WO2015113295A1

WO2015113295A1 - Data transmission method and device

Info

Publication number: WO2015113295A1
Application number: PCT/CN2014/071826
Authority: WO
Inventors: 栗忠峰
Original assignee: 华为技术有限公司
Priority date: 2014-01-29
Filing date: 2014-01-29
Publication date: 2015-08-06
Also published as: CN105594274A; CN110635885A; CN110582123A; CN105594274B; CN110635885B; CN110582123B

Abstract

Provided are a data transmission method and device, the method comprising: a UE determines a transport block size (TBS); the UE determines time domain resources and frequency resources of a transmission physical downlink shared channel (PDSCH), the PDSCH being used to transmit the transport block; the UE receives the transport block over the time domain resources and frequency resources. The data transmission method and device can reduce control signaling overhead, thus improving transmission efficiency of a system.

Description

Data transmission method and device

Technical field

The present invention relates to communication technologies, and in particular, to a data transmission method and apparatus. Background technique

The development of communication technology is experiencing communication from person to person, to communication between people and things, to communication between things. With the diversification of communication forms, the content of communication is also diversified. From the size of the packet, the communication of small packets is becoming an important part of the communication service. For example, the machine type communication (MTC) discussed by the 3rd Generation Partnership Project (3GPP) standard organization defines the block size of the physical layer (transport block size, referred to as: TBS ) does not exceed 1000 bits (bits). The existing system uses a downlink control information format (DCI format) in the physical layer scheduling/control downlink (DL) or uplink (UL) data transmission, which is in the physical downlink control channel (physical downlink control channel). PDCCH or transmission on an enhanced physical downlink control channel (Eagle: EPDCCH). The corresponding DCI format for scheduling UL data is DCI format 0 and DCI format 4, where formatO is for a single antenna port UE, format 4 is for a multi-antenna port UE, and DCI format for scheduling DL data is DCI format 1, 1A, 1B, 1C, 1D, 2, 2A, 2B, 2C, 2D, where formatl~lD is for a single codeword, and the data is transmitted when the channel rank is 1. Format 2A~2D can be used for data transmission when the channel rank is greater than 1.

Currently, the LTE system uses downlink control information DCI for DL/UL scheduling of small data packets. When the small data packet service is transmitted, the control signaling overhead is not much different from the service data to be transmitted, which results in a large proportion of signaling overhead in the data transmission process. For example, 1 subframe/TTI is only allocated for large packets or small packets for transmission. The system bandwidth is 10 MHz, the DL signaling uses DCI format 1A, and the corresponding DCI size is 28 bits. There are four types of transport blocks: 2000 bits, 1000 bits, 200 bits and 40 bits. Assuming that the bits of data and signaling share the resources within one subframe fairly, the corresponding signaling and data are used. The ratio of the number of bits is: 1.4%, 2.8%, 14%, 70%, and the corresponding resource utilization ratio is about 1.4%, 2.8%, 14%, 70%.

It can be seen that for the transmission of small data, the control signaling overhead of the prior art data transmission method is too large, resulting in a reduction in system capacity. Summary of the invention

Embodiments of the present invention provide a data transmission method and apparatus, which reduce physical layer signaling overhead and improve system capacity.

In a first aspect, an embodiment of the present invention provides a user equipment UE, including:

a determining module, configured to determine a transport block size TBS;

The determining module is further configured to determine a time domain resource and a frequency resource for transmitting a physical downlink shared channel PDSCH, where the PDSCH is used to transmit the transport block;

And a receiving module, configured to receive the transport block on the time domain resource and the frequency resource.

In a first possible implementation manner of the first aspect, the determining module is specifically configured to: determine that the size of the transport block is a preset TBS; or

Receiving a first signaling sent by the base station, and determining a size TBS of the transport block according to the indication information in the first signaling, where the first signaling is at least one of: RRC signaling, PDCCH, EPDCCH, or medium Access Control MAC Control Element CE Signaling.

In a second possible implementation manner of the first aspect, the determining module is specifically configured to: determine a coding rate for transmitting the PDSCH;

The receiving module is specifically configured to receive, according to the coding rate of the PDSCH, the transport block on the time domain resource and the frequency resource.

According to a second possible implementation manner of the first aspect, in a third possible implementation manner, the coding rate of the PDSCH includes an aggregation level of resource granularity of the PDSCH;

The determining module is specifically configured to:

Determining, according to the configuration of the base station, an aggregation level of the resource granularity of the PDSCH; or determining, according to the configuration of the PDSCH, the aggregation level of the resource granularity of the PDSCH is a preset aggregation level;

The aggregation level of the resource granularity of the PDSCH is: the resource granularity CCE of the physical downlink control channel PDCCH or the aggregation level of the resource granularity ECCE of the enhanced physical downlink control channel EPDCCH, or the aggregation level of the transmission PDSCH is at least Contains Aggregation level 6.

According to a third possible implementation manner of the first aspect, in a fourth possible implementation manner, the resource granularity includes any one of the following resource granularities or multiples of any one of the following resource granularities: CCE, ECCE, REG, EREG, PRB, VRB.

According to the first aspect, any one of the first to the fourth possible implementation manners of the first aspect, in the fifth possible implementation, the determining module is specifically configured to:

Determining the resource block RB transmitting the PDSCH is a preset resource block RB; or

Receiving a second signaling sent by the base station, and determining, according to the indication information in the second signaling, a resource block RB that transmits a PDSCH, where the second signaling is at least one of: RRC signaling, PDCCH, EPDCCH, or MAC CE Signaling.

According to the first aspect, any one of the first to the fourth possible implementation manners of the first aspect, in the sixth possible implementation, the determining module is specifically configured to:

Determining the bandwidth of the PDSCH according to the configuration of the base station;

Receiving a third signaling sent by the base station, and determining a first starting location of the frequency resource of the PDSCH according to the indication information in the third signaling, where the third signaling is at least one of the following: RRC signaling, PDCCH , EPDCCH or MAC CE signaling.

According to the fifth or the sixth possible implementation of the first aspect, in a seventh possible implementation, the determining module is specifically configured to:

Receiving a fourth signaling sent by the base station, and determining, according to the indication information in the fourth signaling, a second starting location of the frequency resource that is used to listen to the PDSCH, where the fourth signaling is at least one of the following: RRC signaling , PDCCH, EPDCCH or MAC CE signaling; or,

A second starting position of the frequency resource that listens to the PDSCH is determined according to a preset hash function. In an eighth possible implementation manner of the first aspect, the determining module is specifically configured to: receive a fifth signaling sent by the base station, and determine, according to the indication information in the fifth signaling, a time domain resource for transmitting the PDSCH For the first subframe, the fifth signaling is at least one of: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling; or

Determining that the subframe of the PDSCH is a preset first subframe.

According to the eighth possible implementation manner of the first aspect, in the ninth possible implementation manner, the indication information in the fifth signaling further includes a discontinuous reception period and a start subframe of the discontinuous reception, an active time The activity time includes detecting a time corresponding to the activity timer and/or inactivity The time corresponding to the time.

According to the ninth possible implementation manner of the first aspect, in a tenth possible implementation manner, the first subframe used for transmitting the PDSCH is a subframe in the active time.

According to the first aspect, the first to the tenth possible implementation manners of the first aspect, in an eleventh possible implementation manner,

And a sending module, configured to: after the receiving module correctly receives the PDSCH, send an acknowledgement message ACK to the base station; or, after the determining module determines that the PDSCH cannot be received, send a non-confirmation message NACK to the base station.

According to the first aspect, any one of the first to the eleventh possible implementation manners of the first aspect, in the twelfth possible implementation manner,

The monitoring module is configured to monitor the control channel and the \ or PDSCH in the first time of the search space configured by the base station and/or the base station configuration.

According to the twelfth possible implementation manner of the first aspect, in the thirteenth possible implementation manner, when the monitoring module monitors the control channel and the PDSCH in different the first time, the monitoring The time interval of the first time of the control channel is greater than or less than the time interval of the first time to listen to the PDSCH.

According to the thirteenth possible implementation manner of the first aspect, in the fourteenth possible implementation manner, the monitoring module is specifically configured to: monitor control in a search space configured by the base station and/or a configuration configuration of the base station In the case of the channel and the PDSCH, the control channel and the PDSCH are distinguished by the size of the transport block TBS, or the control channel and the PDSCH are distinguished according to at least one of the resource granularity, the time domain location, and the frequency domain location, or according to the preset first indication. Information to distinguish between control channels and

PDSCH.

According to the fourteenth possible implementation manner of the first aspect, in the fifteenth possible implementation manner, the monitoring module is specifically configured to:

The DCI and the PDSCH are differentiated according to the cyclic redundancy check CRC scrambled scrambling code, and the control channel and the PDSCH are distinguished according to the new indication bit in the DCI or the first indication information in the original bit.

According to the first aspect, any one of the first to the fifteenth possible implementation manners of the first aspect, in the sixteenth possible implementation manner, the TBS is a TBS specified by the Long Term Evolution (LTE) protocol Subset. According to the first aspect, the first to the sixteenth possible implementation manners of the first aspect, in the seventeenth possible implementation manner, the determining module is further configured to:

Determining, according to a preset rule, that the PDSCH is in a listening mode, or

Receiving the sixth signaling sent by the base station, and determining, according to the indication information in the sixth signaling, that the PDSCH is in a listening mode, where the sixth signaling is at least one of: RRC signaling, PDCCH, EPDCCH, or MAC CE Signaling.

In a second aspect, an embodiment of the present invention provides a UE, including: a determining module, configured to determine a range of frequency resources used for downlink control information DCI indication;

The determining module is further configured to determine, according to the indication information in the DCI, a frequency resource used for data transmission;

And a data transmission module, configured to transmit data on the frequency resource used for data transmission.

In a first possible implementation manner of the second aspect, the determining module is specifically configured to: adopt a preset first frequency resource as a range of frequency resources used for the DCI indication; or receive the first Seven signaling, and determining, according to the indication information in the seventh signaling, the range of the frequency resource used for the DCI indication, where the seventh signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH, or media connection Incoming control MAC control element CE signaling.

According to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the method further includes:

And a receiving module, configured to receive a second DCI sent by the base station, where the DCI indicates a coding rate of the data.

According to a second possible implementation manner of the second aspect, in a third possible implementation manner, the coding rate includes an aggregation level of resource granularity of the data.

According to the second aspect, the first to the third possible implementation manner of the second aspect, in the fourth possible implementation, the determining module is further configured to:

Before the data transmission module transmits data on the frequency resource for data transmission, determining that a transport block size TBS of the data is a preset TBS, or receiving an eighth signaling sent by the base station, and Determining the TBS according to the indication information in the eighth signaling, where the eighth signaling includes at least one of the following: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling.

According to the second aspect, the first to the third possible implementation manner of the second aspect, in the fifth possible implementation, the determining module is further configured to: Receiving a third DCI sent by the base station, and determining a TBS in a specific modulation mode according to the indication information in the DCI, where the specific modulation mode is determined by a preset or signaling configuration.

According to the second aspect, any one of the first to fifth possible implementation manners of the second aspect, in a sixth possible implementation manner:

When the system bandwidth is one of {1.4MHz, 3 MHz, 5MHz, 10MHz, 15MHz, 20MHz}, or one of {6RB, 15RB, 30RB, 50RB, 75RB, 100RB}, the DCI indication is used. The range of frequency resources is less than the system bandwidth.

According to the second aspect, the first to the sixth possible implementation manner of the second aspect, in the seventh possible implementation, the receiving module is further configured to:

Receiving a second subframe configured by the base station;

The determining module is further configured to determine a common control channel of the UE in the second subframe. According to the seventh possible implementation manner of the second aspect, in an eighth possible implementation manner, the period of the second subframe is an integer multiple of the discontinuous reception period DRX.

In a third aspect, an embodiment of the present invention provides a base station, including:

a determining module, configured to determine a transport block size TBS to be sent;

And a sending module, configured to send the transport block to the user equipment UE on the time domain resource and the frequency resource.

In a first possible implementation manner of the third aspect, the determining module is specifically configured to: determine that the size of the transport block is a preset TBS; or

Sending, to the UE, first signaling, where the first signaling includes indication information for determining a transport block size TBS, where the first signaling is at least one of: RRC signaling, PDCCH, EPDCCH, or media connection Incoming control MAC control element CE signaling.

In a second possible implementation manner of the third aspect, the determining module is further configured to: determine a coding rate of the PDSCH;

The sending module is specifically configured to send the transport block to the user equipment UE according to the coding rate of the PDSCH on the time domain resource and the frequency resource.

According to a second possible implementation manner of the third aspect, in a third possible implementation manner, the coding rate of the PDSCH includes an aggregation level of resource granularity of the PDSCH; The determining module is specifically configured to:

Determining, by the UE, an aggregation level configuration message to the UE, to determine, by the UE, an aggregation level of a resource granularity of transmitting a PDSCH according to the configuration message;

The aggregation level of the resource granularity of the PDSCH includes a physical downlink control channel.

Resource granularity of the PDCCH CCE or enhanced physical downlink control channel Resource granularity of the EPDCCH The subset of the aggregation level of the ECCE or the aggregation level of the resource granularity of the PDSCH includes at least the aggregation level 6.

According to a third possible implementation manner of the third aspect, in a fourth possible implementation manner, the aggregation level includes any one of the following resource granularities or multiples of any one of the following resource granularities: CCE, ECCE, REG, EREG, PRB, VRB.

According to the third aspect, any one of the first to the fourth possible implementation manners of the third aspect, in the fifth possible implementation, the determining module is specifically configured to:

Transmitting, to the UE, the second signaling, where the second signaling includes indication information for determining a resource block RB of the PDSCH, where the second signaling is at least one of: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling.

According to the third aspect, the first to the fourth possible implementation manners of the third aspect, in the sixth possible implementation, the determining module is specifically configured to:

Determining the bandwidth of the transmitted PDSCH as a preset bandwidth;

Sending the third signaling to the UE, where the third signaling includes indication information of determining a first starting location of a frequency resource of the PDSCH, where the third signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH Or MAC CE signaling.

According to the fifth or sixth possible implementation manner of the third aspect, in a seventh possible implementation, the determining module is further configured to:

Transmitting, to the UE, fourth signaling, where the fourth signaling includes indication information for enabling the UE to determine a second starting location of the frequency resource that is to listen to the PDSCH, where the fourth signaling is at least one of the following : RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

In an eighth possible implementation manner of the third aspect, the determining module is specifically configured to: determine that the time domain resource that transmits the PDSCH is the preset first subframe; or The fifth signaling sent to the UE, where the fifth signaling includes indication information that determines a first subframe in which the PDSCH is transmitted.

According to the eighth possible implementation manner of the third aspect, in the ninth possible implementation manner, the indication information in the fifth signaling further includes a discontinuous reception period and a start subframe of the discontinuous reception, an active time The activity time includes detecting a time corresponding to the activity timer and/or a time corresponding to the inactivity timer.

According to the ninth possible implementation manner of the third aspect, in a tenth possible implementation manner, the first subframe used for transmitting the PDSCH is a subframe in the active time.

According to the third aspect, the first to the tenth possible implementation manners of the third aspect, in an eleventh possible implementation manner,

And a receiving module, configured to receive an acknowledgement message ACK or a non-acknowledgement message NACK sent by the UE. According to the eleventh possible implementation manner of the third aspect, in a twelfth possible implementation manner, when the base station does not receive the acknowledgement message ACK sent by the UE in the first preset time, The base station resends the transport block within a second preset time.

According to the third aspect, the first to the twelfth possible implementation manners of the third aspect, in the thirteenth possible implementation manner, the sending module is further configured to:

The control channel and \ or PDSCH are transmitted to the UE in a preset search space and / or a preset first time.

According to the thirteenth possible implementation manner of the third aspect, in the fourteenth possible implementation manner, when the sending module sends the control channel and the PDSCH in different the first time, the sending The time interval of the first time of the control channel is greater than or less than the time interval of the first time at which the PDSCH is transmitted.

According to the thirteenth or fourteenth possible implementation manner of the third aspect, in the fifteenth possible implementation manner, when the sending module is in a preset search space and/or a preset first time When the control channel and the PDSCH are sent to the UE, the control channel or the PDSCH further includes preset first indication information, where the UE is used to distinguish the control channel from the PDSCH.

According to the third aspect, any one of the first to the fifteenth possible implementation manners of the third aspect, in the sixteenth possible implementation manner, the TBS is a TBS specified by the Long Term Evolution (LTE) protocol Subset.

According to the third aspect, any of the first to sixteenth possible implementations of the third aspect In a seventeenth possible implementation manner, the determining module is further configured to:

Sending, to the UE, a sixth signaling, where the sixth signaling includes indication information for determining that the PDSCH is a listening mode, where the sixth signaling is at least one of: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling.

According to the third aspect, the first to the seventeenth possible implementation manners of the third aspect, in the eighteenth possible implementation, the sending module is specifically configured to:

When the physical downlink shared channel (PDSCH) is transmitted by using the non-MBSFN subframe, the PDSCH is transmitted by using the antenna port 0 or by using the transmit diversity.

When the PDSCH is transmitted using the MBSFN subframe, the antenna port 7 is used to transmit the

PDSCH.

In a fourth aspect, an embodiment of the present invention provides a base station, including:

a determining module, configured to determine a range of frequency resources used for downlink control information DCI indication; a sending module, configured to send the DCI to a user equipment UE, so that the UE determines, according to the indication information in the DCI, for data Frequency resource for transmission;

And a data transmission module, configured to perform data transmission by using the frequency resource used for data transmission. In a first possible implementation manner of the fourth aspect, the determining module is specifically configured to: adopt a preset first frequency resource as a range of frequency resources used for DCI indication; or send a seventh to the UE Signaling, the seventh signaling includes indication information for determining a range of the frequency resource used for the DCI indication, where the seventh signaling is at least one of: RRC signaling, PDCCH, EPDCCH, or media connection Incoming control MAC control element CE signaling.

According to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the sending module is further configured to:

Sending a second DCI to the UE, where the second DCI includes indication information for indicating a coding rate of the data.

According to a second possible implementation manner of the fourth aspect, in a third possible implementation manner, the coding rate indicated by the second DCI includes an aggregation level indicated by the DCI.

According to the fourth aspect, the first to the third possible implementation manner of the fourth aspect, in the fourth possible implementation, the determining module is further configured to:

Determining that the transport block size TBS of the transmitted data is a preset TBS, or Transmitting, to the UE, eighth signaling, where the eighth signaling includes indication information for determining the TBS, where the eighth signaling includes at least one of the following: RRC signaling, MAC CE signaling, or DCI .

According to the fourth aspect, the first to the third possible implementation manner of the fourth aspect, in the fifth possible implementation, the determining module is further configured to:

Determining a TBS in a specific modulation mode of the transmission data, where the specific modulation mode is determined by a preset or signaling configuration;

And transmitting, to the UE, a third DCI, where the third DCI includes indication information for determining a TBS in a specific modulation mode.

According to the fourth aspect, any one of the first to fifth possible implementation manners of the fourth aspect, in a sixth possible implementation manner:

When the system bandwidth is one of {1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz}, or one of {6RB, 15RB, 30RB, 50RB, 75RB, 100RB}, the frequency for DCI indication The range is less than the system bandwidth.

According to the fourth aspect, the first to the sixth possible implementation manner of the fourth aspect, in the seventh possible implementation, the sending module is further configured to:

Sending, to the UE, a configuration message including a second subframe, to indicate that the UE monitors a common control channel of the UE in the second subframe.

According to the seventh possible implementation manner of the fourth aspect, in an eighth possible implementation manner, the period of the second subframe is an integer multiple of the discontinuous reception period DRX.

A fifth aspect of the present invention provides a data transmission method, including:

User equipment UE determines a transport block size TBS;

Determining, by the UE, a time domain resource and a frequency resource for transmitting a physical downlink shared channel PDSCH, where the PDSCH is used to transmit the transport block;

The UE receives the transport block on the time domain resource and the frequency resource.

In a first possible implementation manner of the fifth aspect, the determining, by the UE, a transport block size, a TBS, includes:

Determining, by the UE, that the size of the transport block is a preset TBS; or

The UE receives the first signaling sent by the base station, and determines the size TBS of the transport block according to the indication information in the first signaling, where the first signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or medium access control MAC Control Element CE signaling. In a second possible implementation manner of the fifth aspect, the method further includes: determining, by the UE, a coding rate of transmitting a PDSCH;

Receiving, by the UE, the transport block on the time domain resource and the frequency resource, the method includes: receiving, by the UE, the transport block according to the coding rate on the time domain resource and the frequency resource.

According to a second possible implementation manner of the fifth aspect, in a third possible implementation, the coding rate of the PDSCH is transmitted, including an aggregation level of a resource granularity of the PDSCH, where the UE determines to transmit a PDSCH. The encoding rate, including:

And determining, by the UE, the aggregation level of the resource granularity of the PDSCH to be transmitted according to the configuration of the base station; or, the determining, by the UE, the aggregation level of the resource granularity of the PDSCH is a preset aggregation level, where the aggregation level of the resource granularity of the PDSCH is: The resource granularity CCE of the physical downlink control channel PDCCH or the subset of the aggregation level of the resource granularity ECCE of the enhanced physical downlink control channel EPDCCH is transmitted, or the aggregation level of the transmitted PDSCH includes at least the aggregation level 6.

According to a third possible implementation manner of the fifth aspect, in a fourth possible implementation manner, the resource granularity includes any one of the following resource granularities or multiples of any one of the following resource granularities: CCE, ECCE, REG, EREG, PRB, VRB.

According to the fifth aspect, any one of the first to the fourth possible implementation manners of the fifth aspect, in a fifth possible implementation manner, the UE determines a frequency resource for transmitting a PDSCH, including:

The UE determines that the resource block RB of the PDSCH is the preset resource block RB; or the UE receives the second signaling sent by the base station, and determines the resource block for transmitting the PDSCH according to the indication information in the second signaling. RB, the second signaling is at least one of the following: RRC signaling,

PDCCH, EPDCCH or MAC CE signaling.

According to the fifth aspect, any one of the first to fourth possible implementation manners of the fifth aspect, in a sixth possible implementation manner, the UE determines a frequency resource for transmitting a PDSCH, including:

Determining, by the UE, a bandwidth of the PDSCH according to a configuration of the base station;

The UE receives the third signaling sent by the base station, and determines a first starting location of the frequency resource of the PDSCH according to the indication information in the third signaling, where the third signaling is at least one of the following : RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

According to the fifth or the sixth possible implementation manner of the fifth aspect, in a seventh possible implementation manner, the determining, by the UE, a frequency resource for transmitting the PDSCH, the method further includes:

The UE receives the fourth signaling sent by the base station, and determines, according to the indication information in the fourth signaling, a second starting location of the frequency resource that is to be used for monitoring the PDSCH, where the fourth signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling; or,

The UE determines a second start position of the frequency resource that listens to the PDSCH according to a preset hash function.

In an eighth possible implementation manner of the fifth aspect, the determining, by the UE, the time domain resource for transmitting the PDSCH includes:

The UE receives the fifth signaling sent by the base station, and determines, according to the indication information in the fifth signaling, that the time domain resource for transmitting the PDSCH is the first subframe, and the fifth signaling is at least one of the following: Or the PDCCH, the PDCCH, the EPDCCH, or the MAC CE signaling, or the UE determines that the subframe of the PDSCH is a preset first subframe.

According to the eighth possible implementation manner of the fifth aspect, in the ninth possible implementation manner, the indication information in the fifth signaling further includes a discontinuous reception period and a start subframe of the discontinuous reception, an active time The activity time includes detecting a time corresponding to the activity timer and/or a time corresponding to the inactivity timer.

According to the ninth possible implementation manner of the fifth aspect, in a tenth possible implementation manner, the first subframe used for transmitting the PDSCH is a subframe in the active time.

According to the fifth aspect, any one of the first to the tenth possible implementation manners of the fifth aspect, in the eleventh possible implementation manner, the UE is in the time domain resource and the frequency resource After receiving the transport block according to the coding rate, the method further includes:

After the UE correctly receives the PDSCH, the UE sends an acknowledgement message ACK to the base station; or, after the UE determines that the PDSCH cannot be received, the UE sends a non-acknowledgement message NACK to the base station.

According to the fifth aspect, the first to the eleventh possible implementation manners of the fifth aspect, in the twelfth possible implementation, the method further includes:

The UE monitors the control channel and/or the PDSCH in a search space configured by the base station and/or a first time configured by the base station. According to the twelfth possible implementation manner of the fifth aspect, in a thirteenth possible implementation manner, when the UE monitors a control channel and a PDSCH in different times, the monitoring control channel is The time interval of the first time is greater than or less than the time interval of the first time to listen to the PDSCH.

According to the thirteenth possible implementation manner of the fifth aspect, in the fourteenth possible implementation manner, when the UE monitors the control channel and the PDSCH in a search space configured by the base station and/or a configuration configured by the base station The control channel and the PDSCH are distinguished by the size of the transport block TBS, or the control channel and the PDSCH are distinguished according to at least one of the resource granularity, the time domain location, and the frequency domain location, or the control is differentiated according to the preset first indication information. Channel and PDSCH.

According to the fourteenth possible implementation manner of the fifth aspect, in the fifteenth possible implementation manner, the distinguishing the control channel and the PDSCH according to the preset first indication information, including:

According to the fifth aspect, any one of the first to the fifteenth possible implementation manners of the fifth aspect, in the sixteenth possible implementation manner, the TBS is the TBS specified by the Long Term Evolution (LTE) protocol Subset.

According to the fifth aspect, the first to the sixteenth possible implementation manners of the fifth aspect, in the seventeenth possible implementation manner,

Determining, by the UE, that the PDSCH is in a listening mode according to a preset rule, or

The UE receives the sixth signaling sent by the base station, and determines that the PDSCH is in the listening mode according to the indication information in the sixth signaling, where the sixth signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH Or MAC CE signaling.

In a sixth aspect, an embodiment of the present invention provides a data transmission method, including:

The user equipment UE determines a range of frequency resources used for downlink control information DCI indication; the UE determines a frequency resource used for data transmission according to the indication information in the DCI; and the frequency resource used by the UE for data transmission Transfer data on.

In a first possible implementation manner of the sixth aspect, the determining, by the UE, a range of frequency resources for the DCI indication includes:

The UE adopts a preset first frequency resource as a range of frequency resources used for DCI indication; or,

The UE receives the seventh signaling sent by the base station, and determines the range of the frequency resource used for the DCI indication according to the indication information in the seventh signaling, where the seventh signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH, or medium access control MAC Control Element CE signaling.

According to the sixth aspect or the first possible implementation manner of the sixth aspect, in a second possible implementation manner, before the UE transmits data on the frequency resource used for data transmission, the method further includes:

Receiving, by the UE, a second DCI sent by the base station, where the DCI indicates a coding rate of the data.

According to a second possible implementation manner of the sixth aspect, in a third possible implementation, the coding rate includes an aggregation level of resource granularity of the data; or

The coding rate includes a number of PRBs of the first data defining the modulation mode and a TBS corresponding to the first data, and the modulation mode is defined by a preset or signaling configuration.

According to the sixth aspect, the first to the third possible implementation manner of the sixth aspect, before the transmitting, by the UE, the data on the frequency resource used for data transmission, the method further includes: The UE determines that the transport block size TBS of the data is a preset TBS, or the UE receives the eighth signaling sent by the base station, and determines the TBS according to the indication information in the eighth signaling. The eighth signaling includes at least one of the following: RRC signaling, PDDCH, EPDCCH, or MAC CE signaling.

According to the sixth aspect, any one of the first to the third possible implementation manners of the sixth aspect, in a fifth possible implementation manner, the frequency resource used by the UE in the data transmission Before transferring data, it also includes:

The UE receives the third DCI sent by the base station, and determines a TBS in a specific modulation mode according to the indication information in the DCI, where the specific modulation mode is determined by a preset or signaling configuration.

According to the sixth aspect, any one of the first to fifth possible implementation manners of the sixth aspect, in a sixth possible implementation manner:

When the system bandwidth is one of {1.4MHz, 3 MHz, 5MHz, 10MHz, 15MHz, 20MHz}, or one of {6RB, 15RB, 30RB, 50RB, 75RB, 100RB}, the DCI indication is used. The range of frequency resources is less than the system bandwidth. According to the sixth aspect, the first to the sixth possible implementation manner of the sixth aspect, in a seventh possible implementation, the method further includes:

The UE receives a second subframe configured by the base station, and the UE monitors a common control channel in the second subframe.

According to the seventh possible implementation manner of the sixth aspect, in an eighth possible implementation manner, the period of the second subframe is an integer multiple of the discontinuous reception period DRX.

The seventh aspect of the present invention provides a data transmission method, including:

The base station determines a transport block size TBS to be sent;

Determining, by the base station, a time domain resource and a frequency resource for transmitting a physical downlink shared channel PDSCH, where the PDSCH is used to transmit the transport block;

The base station sends the transport block to the user equipment UE on the time domain resource and the frequency resource. In a first possible implementation manner of the seventh aspect, the determining, by the base station, a transport block size, a TBS, includes:

Determining, by the base station, that the size of the transport block is a preset TBS; or

The base station sends the first signaling to the UE, where the first signaling includes indication information for determining a transport block size TBS, where the first signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH Or medium access control MAC control element CE signaling.

In a second possible implementation manner of the seventh aspect, the method further includes:

Determining, by the base station, a coding rate for transmitting the PDSCH;

And sending, by the base station, the transport block to the user equipment UE on the time domain resource and the frequency resource, including:

The base station sends the transport block to the user equipment UE according to the coding rate on the time domain resource and the frequency resource.

According to a second possible implementation manner of the seventh aspect, in a third possible implementation manner, the coding rate of the transmit PDSCH includes: an aggregation level of a resource granularity of a PDSCH to be transmitted; and the base station determines a code for transmitting a PDSCH Rate, including:

Determining, by the base station, that the aggregation level of the resource granularity of the PDSCH is a preset aggregation level; or, the base station sends an aggregation level configuration message to the UE, so that the UE determines, according to the configuration message, a resource for transmitting the PDSCH. Aggregate level of granularity;

The aggregation level of the resource granularity of the PDSCH includes a physical downlink control channel. The resource granularity CCE of the PDCCH or the subset of the aggregation level of the resource granularity ECCE of the enhanced physical downlink control channel EPDCCH, or the aggregation level of the resource granularity of the PDSCH at least includes the aggregation level 6.

According to a third possible implementation manner of the seventh aspect, in a fourth possible implementation, the aggregation level includes any one of the following resource granularities or multiples of any one of the following resource granularities: CCE, ECCE, REG, EREG, PRB, VRB.

According to the seventh aspect, the first to the fourth possible implementation manners of the seventh aspect, in the fifth possible implementation, the determining, by the base station, the frequency resource for transmitting the PDSCH includes:

Determining, by the base station, that the resource block RB of the PDSCH is the preset resource block RB; or, the base station sends the second signaling to the UE, where the second signaling includes the resource block RB for determining the PDSCH Instructing information, the second signaling is at least one of: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling.

According to the seventh aspect, the any one of the first to the fourth possible implementation manners of the seventh aspect, in the sixth possible implementation manner, the determining, by the base station, the frequency resource of the PDSCH, Determining the bandwidth of the transmission PDSCH as a preset bandwidth;

The base station sends the third signaling to the UE, where the third signaling includes indication information for determining a first starting position of a frequency resource of the PDSCH, where the third signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

According to the fifth or the sixth possible implementation manner of the seventh aspect, in a seventh possible implementation manner, the determining, by the base station, the frequency resource for transmitting the PDSCH, the method further includes:

The base station sends a fourth signaling to the UE, where the fourth signaling includes indication information for enabling the UE to determine a second starting location of the frequency resource for listening to the PDSCH, where the fourth signaling is At least one of the following: _RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

In an eighth possible implementation manner of the seventh aspect, the determining, by the base station, the time domain resource for transmitting the PDSCH includes:

Determining, by the base station, that the time domain resource for transmitting the PDSCH is the first subframe that is preset; or the fifth signaling sent by the base station to the UE, where the fifth signaling includes determining to determine the first sub-transmission of the PDSCH The indication of the frame.

According to the eighth possible implementation manner of the seventh aspect, in a ninth possible implementation manner, The indication information in the fifth signaling further includes a discontinuous reception period and a start subframe of the discontinuous reception, and an active time, where the active time includes detecting a time corresponding to the active timer and/or a time corresponding to the inactivity timer. .

According to the ninth possible implementation manner of the seventh aspect, in a tenth possible implementation manner, the first subframe used for transmitting the PDSCH is a subframe in the active time.

According to the seventh aspect, any one of the first to the tenth possible implementation manners of the seventh aspect, in the eleventh possible implementation manner, the base station is in the time domain resource, the frequency resource After the transmitting the transport block to the UE according to the coding rate, the method further includes:

The base station receives an acknowledgement message ACK or a non-acknowledgement message NACK sent by the UE.

According to the eleventh possible implementation manner of the seventh aspect, in a twelfth possible implementation manner, when the base station does not receive the acknowledgement message ACK sent by the UE in the first preset time, The base station resends the transport block within a second preset time.

According to the seventh aspect, the first to the twelfth possible implementation manners of the seventh aspect, in the thirteenth possible implementation manner,

The base station sends a control channel and/or a PDSCH to the UE in a preset search space and/or a preset first time.

According to the thirteenth possible implementation manner of the seventh aspect, in the fourteenth possible implementation manner, when the base station sends the control channel and the PDSCH in different the first time, the sending control The time interval of the first time of the channel is greater than or less than the time interval of the first time at which the PDSCH is transmitted.

According to the thirteenth or fourteenth possible implementation manner of the seventh aspect, in the fifteenth possible implementation manner, when the base station is in a preset search space and/or a preset first time When the control channel and the PDSCH are sent to the UE, the control channel or the PDSCH further includes preset first indication information, where the UE is used to distinguish the control channel from the PDSCH.

According to the seventh aspect, the any one of the first to the fifteenth possible implementation manners of the seventh aspect, in the sixteenth possible implementation manner, the TBS is the TBS specified by the Long Term Evolution (LTE) protocol Subset.

According to the seventh aspect, the any one of the first to the sixteenth possible implementation manners of the seventh aspect, in the seventeenth possible implementation manner,

Determining, by the base station, that the PDSCH is in a listening mode according to a preset rule, or The base station sends a sixth signaling to the UE, where the sixth signaling includes indication information for determining that the PDSCH is a listening mode, and the sixth signaling is at least one of the following: RRC signaling, PDCCH , EPDCCH or MAC CE signaling.

According to the seventh aspect, any one of the first to the seventeenth possible implementation manners of the seventh aspect, in the eighteenth possible implementation manner, the base station adopts the frequency used for data transmission Resources for data transfer, including:

When the base station uses the non-MBSFN subframe to transmit the physical downlink shared channel (PDSCH), the base station sends the PDSCH by using the antenna port 0 or using the transmit diversity.

When the base station transmits the PDSCH by using the MBSFN subframe, the base station transmits the PDSCH by using the antenna port port 7.

The eighth aspect of the present invention provides a data transmission method, including:

Determining, by the base station, a range of frequency resources used for downlink control information DCI indication;

Sending, by the base station, the DCI to the user equipment UE, so that the UE determines a frequency resource used for data transmission according to the indication information in the DCI;

The base station uses the frequency resource for data transmission to perform data transmission.

In a first possible implementation manner of the eighth aspect, the determining, by the base station, a range of frequency resources used for the DCI indication includes:

The base station adopts a preset first frequency resource as a range of frequency resources used for DCI indication; or

The base station sends the seventh signaling to the UE, where the seventh signaling includes indication information for determining a range of the frequency resource used for the DCI indication, where the seventh signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH, or medium access control MAC Control Element CE signaling.

According to the eighth aspect or the first possible implementation manner of the eighth aspect, in a second possible implementation manner, the method further includes:

The base station sends a second DCI to the UE, where the second DCI includes indication information for indicating a coding rate of the data.

According to a second possible implementation manner of the eighth aspect, in a third possible implementation, the coding rate indicated by the second DCI includes an aggregation level indicated by the DCI; or

The coding rate includes a number of PRBs of the first data defining the modulation mode and a TBS corresponding to the first data, where the modulation mode is defined by a preset or signaling configuration. According to the eighth aspect, the first to the third possible implementation manner of the eighth aspect, in a fourth possible implementation, the method further includes:

The base station determines that the transport block size TBS of the transmission data is a preset TBS, or the base station sends an eighth signaling to the UE, where the eighth signaling includes an indication for determining the TBS. Information, the eighth signaling includes at least one of the following: RRC signaling, MAC CE signaling, or DCI.

According to the eighth aspect, the first to the third possible implementation manner of the eighth aspect, in a fifth possible implementation, the method further includes:

Determining, by the base station, a TBS in a specific modulation mode of the transmission data, where the specific modulation mode is determined by a preset or signaling configuration;

The base station sends a third DCI to the UE, where the third DCI includes indication information for determining a TBS in a specific modulation mode.

According to the eighth aspect, any one of the first to fifth possible implementation manners of the eighth aspect, in the sixth possible implementation manner:

When the system bandwidth is one of {1.4MHz, 3 MHz, 5MHz, 10MHz, 15MHz, 20MHz}, or one of {6RB, 15RB, 30RB, 50RB, 75RB, 100RB}, the DCI is used for DCI The indicated frequency range is less than the system bandwidth;

According to the eighth aspect, the first to the sixth possible implementation manner of the eighth aspect, in the seventh possible implementation, the method further includes:

The base station sends a configuration message including a second subframe to the UE, to indicate that the UE listens to the common control channel in the second subframe.

According to the seventh possible implementation manner of the eighth aspect, in an eighth possible implementation manner, the period of the second subframe is an integer multiple of the discontinuous reception period DRX.

The data method, device, and system provided by the embodiment of the present invention, after determining the transport block size TBS, the time domain resource for transmitting the PDSCH, the frequency resource, and the PDSCH coding rate, the base station and the UE respectively, in the time domain resource and the frequency resource Transmitting the transport block to the UE according to the coding rate, so that blind detection of the PDSCH can be implemented, so that downlink data can be received without the indication of the DCI, and thus the control signaling overhead can be reduced, thereby improving The transmission efficiency of the system.

The data method, device and system provided by the embodiments of the present invention, the base station and the UE are first determined to be used for DCI The range of the indicated frequency resource, that is, the frequency domain resource corresponding to the maximum bandwidth or the maximum bandwidth that can be indicated by the DCI is determined first, and then the frequency resource used for data transmission is determined according to the indication information in the DCI, and the data transmission is performed by using the frequency resource. The frequency domain resource corresponding to the maximum bandwidth or the maximum bandwidth that the DCI can indicate is no longer the frequency domain resource corresponding to the system bandwidth or the system bandwidth, but a frequency domain resource corresponding to a smaller bandwidth or a smaller bandwidth. Therefore, in the DCI The indication information for determining the frequency resource used for data transmission can be reduced, that is, the content indicated by the DCI is reduced, thereby reducing signaling overhead and improving system transmission efficiency. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic structural diagram of Embodiment 1 of a UE according to the present invention;

2 is a schematic structural diagram of a PDSCH transmission subframe that is discontinuously received;

3 is a schematic structural diagram of Embodiment 2 of a UE according to the present invention;

4 is a schematic structural diagram of Embodiment 3 of a UE according to the present invention;

5 is a schematic diagram of listening to a control channel and a PDSCH in a specific first time; FIG. 6 is a schematic structural diagram of a fourth embodiment of a UE according to the present invention;

7 is a schematic structural diagram of Embodiment 5 of a UE according to the present invention;

8 is a schematic structural diagram of Embodiment 1 of a base station according to the present invention;

9 is a schematic structural diagram of Embodiment 2 of a base station according to the present invention;

10 is a schematic structural diagram of Embodiment 3 of a base station according to the present invention;

11 is a schematic structural diagram of Embodiment 6 of a UE according to the present invention;

12 is a schematic structural diagram of Embodiment 7 of a UE according to the present invention;

13 is a schematic structural diagram of Embodiment 4 of a base station according to the present invention;

14 is a schematic structural diagram of Embodiment 5 of a base station according to the present invention;

15 is a flowchart of Embodiment 1 of a data transmission method according to the present invention;

16 is a flowchart of Embodiment 2 of a data transmission method according to the present invention; 17 is a signaling flowchart of Embodiment 3 of a data transmission method according to the present invention;

18 is a schematic diagram of resource granularity and aggregation level;

19 is a flowchart of Embodiment 4 of a data transmission method according to the present invention;

20 is a flowchart of Embodiment 5 of a data transmission method according to the present invention;

21 is a signaling flowchart of Embodiment 6 of a data transmission method according to the present invention;

Figure 22 is a schematic structural view of Embodiment 1 of the system of the present invention;

FIG. 23 is a schematic structural diagram of Embodiment 2 of the system of the present invention. detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

"Data" as used herein refers to a transport block of traffic data, such as a physical layer, that is distinct from control signaling and other signaling or information for indication such as downlink control channel or downlink control information at the physical layer. The embodiment of the present invention is directed to the problem that the transmission efficiency is low due to excessive signaling overhead in the small data transmission process. The UE, the base station, and the data transmission method provided by the embodiments of the present invention may be used to reduce the DCI indication during uplink or downlink transmission. The overhead of signaling.

The service data of the present invention is embodied at the physical layer as the transport block is transmitted by the physical channel, which may be a data channel or may be transmitted in the form of a control channel. Without loss of generality, the present invention is illustrated using a data channel PDSCH (which may also be an enhanced PDSCH) for transmission.

The pre-defined in the embodiment of the present invention may be a factory setting, or may be a manner agreed between the two parties of the communication, such as a base station and a UE. The configuration in the embodiment of the present invention may be configured by using a base station, or The base station and the UE may be separately configured by using other network maintenance tools, or may be configured on the UE side according to the configuration information by receiving configuration information of the base station.

For some small data services, such as M2M (device to device, Mac ne to Madiine, broadly can be understood as device to person, Machine to Man, people to device, Man to Machine, machine to mobile Machine to Mobile) and other applications, The service is relatively stable for a long period of time, which is reflected in the fact that the physical layer (PHY) can transmit over a period of time using a relatively fixed TBS. A relatively fixed TBS can be predefined or configured. When different TBS handovers are required, DCI signaling, such as DCI format 1A, may be used to perform TBS indication, for example, the size of the current or switched TBS may be indicated. When the UE acquires a data channel, such as a Physical Downlink Shared Channel (PDSCH), and a corresponding TBS, the PDSCH may be detected according to a predefined or configured aggregation level. When the location and or aggregation level of the PDSCH are not indicated, the UE needs to blindly detect the PDSCH. Therefore, when the signaling does not indicate the location and or aggregation level of the PDSCH, the UE needs to blindly detect the PDSCH. When the signaling indicates the location and the aggregation level of the PDSCH, the UE may perform the detection of the PDSCH according to the signaling indication, where the detection may be a Cyclic Redundancy Check (CRC), according to whether the CRC check is correct. Determine if PDSDH is detected successfully. The detection subframe of the UE in the time domain can be obtained according to a predefined or configuration. The subframe of the time domain may be set according to a period of discontinuous reception of DRX or a period of extended DRX.

1 is a schematic structural diagram of Embodiment 1 of a UE according to the present invention. As shown in FIG. 1, the UE in this embodiment may include: a determining module 101 and a receiving module 102, where

a determining module 101, configured to determine a transport block size TBS;

The determining module 101 is further configured to determine a time domain resource and a frequency resource for transmitting a physical downlink shared channel PDSCH, where the PDSCH is used to transmit the transport block;

The receiving module 102 is configured to receive the transport block on the time domain resource and the frequency resource. The UE in this embodiment may be used to detect the PDSCH blindly. Of course, the UE may also perform detection according to the indication of Downlink Control Information (DCI). When the data on the PDSCH is received only by blind detection, the indication of the DCI is not required.

When the UE receives the data on the PDSCH in a blind detection manner, it is preferably applied to a scenario in which the TBS of the data can be different from the existing DCI signaling, but when the TBS of the data is the same as the size of the existing DCI signaling. This method is also applicable to the embodiment of the present invention.

In the UE of this embodiment, after the determining module determines the transport block size TBS, the time domain resource of the PDSCH, and the frequency resource, the receiving module receives the transport block on the time domain resource and the frequency resource, so that the Blind detection of the PDSCH, so that downlink data can be received without the indication of DCI, so the control signaling overhead can be reduced, thereby improving the system Transmission efficiency.

The information required for the blind detection of the PDSCH or the PDSCH blind detection is as follows: TBS, frequency domain resources, and time domain resources. The following describes the information that needs to be determined.

Optionally, when determining the TBS of the data, the TBS of the foregoing embodiment may be preset, or may be determined according to a manner of signaling by the base station, and correspondingly, the determining module 101 may be specifically configured to: determine The size of the transport block is a preset TBS; or

The predefined TBS may be one or more of a subset of existing TBS tables or a newly added TBS. When a plurality of TBSs are predefined, the base station can use signaling to indicate which TBS the UE uses for blind detection.

When the TBS is limited to 1000 bits or less, the TBS listed in the following table can be used when multiplexing the existing TBS values:

Generally, a UE with a relatively stable service, such as an MTC UE, has a relatively fixed TBS for a relatively long period of time. Therefore, the base station can notify the TBS of the period of time by the first signaling, and notify the new TBS by the first signaling when the TBS changes. For this purpose, a finite number of TBS values can be predefined, and then the first signalling is used to inform which TBS value is currently being used. The defined finite number of TBS values may be a subset of existing TBS tables, such as {208, 600, 872, 1000}. The first signaling used may be RRC signaling or DCI format or MAC CE or any combination therebetween. For example, the base station may use RRC signaling indication while using a DCI format such as format 1A to indicate the PDSCH carrying the RRC signaling.

Further, the determining module 101 is further configured to:

Determining a coding rate at which the PDSCH is transmitted;

The receiving module 102 may be specifically configured to use, according to the time domain resource and the frequency resource, The coding rate of the PDSCH receives the transport block.

The coding rate of the PDSCH may include an aggregation level of resource granularity of the PDSCH.

Therefore, for determining the coding rate, the determining module 101 may be specifically configured to: determine an aggregation level of a resource granularity for transmitting the PDSCH.

This is because the PDSCH is transmitted by aggregation of resource granularity consisting of one or a group of identical resource granularity units. The aggregation of resource granularity is represented by the aggregation level. If the aggregation level is 1, the PDSCH is transmitted by 1 resource granularity. If the aggregation level is 2, the PDSCH is transmitted by 2 resource granularities.

Further, the determining module 101 may be specifically configured to:

The resource granularity includes any one of the following resource granularities or a multiple of any one of the following resource granularities: CCE, ECCE, REG, EREG, PRB, VRB.

Optionally, there are two ways to determine the frequency domain resource:

In the first implementation, the resource block (resource block, referred to as:

RB) indicates, or may be indicated by a physical resource block PRB (Physical Resource Block) or a virtual resource block VRB (Virtual Resource Block). The following describes RB as an example. The determining module 101 can be specifically configured to:

Receiving second signaling sent by the base station, and determining transmission according to the indication information in the second signaling

The resource block RB of the PDSCH, the second signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

In the second implementation manner, the frequency domain resource is indicated by the bandwidth and the starting location. This manner is especially applicable to the scenario where the frequency domain resource is a continuous resource. The determining module 101 can be specifically configured to: Determining the bandwidth of the PDSCH according to the configuration of the base station;

Further, in the foregoing two implementation manners, the determining module 101 may determine a larger frequency domain resource range. In a specific implementation, the UE may further determine a smaller range to detect in the larger frequency domain resource range. Therefore, the determining module 101 is further specifically configured to:

A second starting position of the frequency resource that listens to the PDSCH is determined according to a preset hash function. For example, the UE first receives a large frequency resource range according to the first mode, for example: RBs numbered 6, 7, 8, 9, 10, 11, 12, 13 and then determined according to the fourth signaling or hash function. The second starting position is blind detection starting from the second starting position. If it is determined that the second starting position is RB 7, the UE can start detecting from RB 7 up to RB 13.

Optionally, the time domain resource for transmitting the PDSCH may be determined by means of signaling or a predefined manner, so the determining module 101 may specifically be used to:

Receiving a fifth signaling sent by the base station, and determining, according to the indication information in the fifth signaling, that the time domain resource for transmitting the PDSCH is the first subframe, and the fifth signaling is at least one of the following: RRC signaling, PDCCH , EPDCCH or MAC CE signaling; or,

Determining that the subframe of the PDSCH is a preset first subframe.

For specific implementation, you can configure discontinuous reception time (Discontinuous Reception, DRX) for PDSCH transmission. 2 is a schematic diagram showing the structure of a discontinuously received PDSCH transmission subframe. As shown in FIG. 2, the UE performs PDSCH detection on a plurality of non-contiguous time intervals. In Figure 2, the UE performs blind detection of the PDSCH during the On duration of each DRX cycle. Correspondingly, the indication information in the fifth signaling may further include a discontinuous reception period and a start subframe of the discontinuous reception, an active time, where the active time includes detecting a time corresponding to an on-duration timer / or the time corresponding to the inactivity timer.

Further, the indication information in the fifth signaling may further indicate that: the first subframe used for transmitting the PDSCH is a subframe in the active time. FIG. 3 is a schematic structural diagram of Embodiment 2 of a UE according to the present invention. As shown in FIG. 3, the UE in this embodiment may further include: a sending module 103, where the sending module 103 may be configured to: when the receiving module correctly receives the PDSCH After that, the acknowledgment message ACK is sent to the base station; or, after the determining module determines that the PDSCH cannot be received, the non-acknowledgement message NACK is sent to the base station.

In this way, when the base station side receives the NACK, or the time when the ACK is not received exceeds a certain threshold, the base station may determine that the UE does not successfully receive the PDSCH, and therefore may resend. The UE may merge the received PDSCH (or the repeatedly transmitted transport block) after the NACK is sent within a preset or configured time. The repeated PDSCH (or repeatedly transmitted transport block) or the new PDSCH (or newly transmitted transport block) can be distinguished by the scrambling code scrambled in the CRC. The scrambling code can be preset or configured by the base station. Alternatively, the coverage enhancement mode may be started. For example, the PDs may be configured to transmit the same PDSCH in consecutive p subframes, where p is an integer, and the coverage is enhanced by accumulating energy. The UE may detect the PDSCH according to the configuration in consecutive p subframes to improve data reception. Success rate.

4 is a schematic structural diagram of Embodiment 3 of a UE according to the present invention. As shown in FIG. 4, the UE in this embodiment may further include: a monitoring module 104, configured to be used in a search space configured by a base station and/or a first time configured by a base station. , listening to the control channel and / or PDSCH. The control channel includes a PDCCH or an E-PDDCH.

The UE in this embodiment may only listen to the control channel in the dedicated search space of the UE or in a certain period of time (or simultaneously specify the search space and the first time), or only listen to the PDSCH, or simultaneously monitor the control channel and the PDSCH. Corresponding transmission modes may include the following: In the UE's dedicated search space (without limitation on time) only the control channel is transmitted; in the UE's dedicated search space (without limitation on time) only PDSCH is transmitted; dedicated search in the UE Space (no restrictions on time) Simultaneous transmission of control channel and PDSCH; Only PDSCH is transmitted in the first time of a certain period (no restrictions on the frequency domain); In the first time of a certain period (no restrictions on the frequency domain) Transmitting the PDSCH; transmitting the control channel and the PDSCH simultaneously at a certain time (without limitation on the frequency domain); transmitting only the PDSCH in the dedicated search space of the UE and at a certain time in a certain period; in the dedicated search space of the UE and at some The segment transmits only the control channel at the first time; the PDSCH and the control channel are simultaneously transmitted in the UE's dedicated search space and at a certain first time. The first time may be a predefined or configured period of time, such as one subframe or several subframes located at the beginning of the discontinuous reception time period. Figure 5 is the monitoring of the control channel and / or PDSCH in a specific first time The schematic diagram, as shown in Figure 5, the control channel and PDSCH sometimes listen at the same time, sometimes not at the same time.

The search space may be configured by a base station or preset, and the first time may be configured by a base station or preset.

When the control channel and the PDSCH are not transmitted in the same first time, the number of blind detections can be reduced, and the power consumption of the UE can be saved.

Further, it may be further defined that: when the monitoring module 104 monitors the control channel and the PDSCH in the different first time, the time interval or period of the first time of the monitoring control channel is greater than or less than that of the PDSCH. The time interval or period of the first time. If the time interval or period of the first time of monitoring the control channel is greater than the time interval or period of the first time of listening to the PDSCH, the signaling overhead is saved; if the time interval or period of the first time of monitoring the control channel is smaller than that of the PDSCH. The time interval or period of the first time facilitates fast handover to the signaling scheduling mode for other TBS handover or hybrid automatic repeat request (Hybrid-ARQ, referred to as HARQ) or coverage enhanced transmission mode.

Further, in an implementation manner, the monitoring module 104 may be specifically configured to: when the control channel and the PDSCH are monitored in a search space configured by the base station and/or a configuration configured by the base station, the TBS is controlled by the size of the transport block. And the channel and the PDSCH, or the control channel and the PDSCH are differentiated according to at least one of a resource granularity, a time domain location, and a frequency domain location, or the control channel and the PDSCH are distinguished according to the preset first indication information.

When the transport block size is different from the signaling size of the existing control channel, the TBS can directly distinguish whether it is a PDSCH or a control channel. The DCI format used by the DCI carried by the control channel may be a subset or all of the existing DCI format. For example, DCI format 1A can be pre-defined, and the transport block size whose value of TBS is not equal to the size of DCI format 1A is considered to be PDSCH transmission.

When the transport block size is the same as the existing DCI format size, it can be distinguished by using a different resource granularity than the DCI format for aggregation or different time-frequency resource locations or explicit indications.

In another implementation manner, the monitoring module 104 may distinguish the downlink control information DCI and the PDSCH according to the cyclic redundancy check CRC scrambled scrambling code, according to the newly added indicator bit in the DCI or the original The first indication information in the bits distinguishes the control channel from the PDSCH. This method adopts an explicit indication and can be applied to a scenario where the PDSCH and the DCI format have the same TBS and the same aggregate resource granularity.

Specifically, the CRC scrambled scrambling code can be used to distinguish between the PDSCH and the DCI format. The scrambling code is predefined or configured. For example, a 16-bit scrambling code can contain <1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1> Or <0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1>. The scrambling code and the CRC check code and the RNTI (Radio Network Temporary Identifier) are added by bit by bit, and then the modulo two operation is performed. For example, the scrambling code sequence is {R. , Ri , R ₂ , .. ., R _L-1 }, CRC sequence is {P. , Pj , P ₂ , .. ., P _{L- 1} } , the RNTI sequence is {X. , X, , X ₂ , .. ., Xw }, the three sequences can be added bit by bit and then subjected to the modulo two operation, and the obtained new sequence (ie, the scrambled sequence) is:

C _k =(P _k +X _k +R _k )mod2 , k=0, ..., L-1

In addition, when the TBS is smaller than the DCI format, the 0 can be complemented by the bit of the TBS so that it is the same size as the existing DCI format. At this time, the CRC scrambled scrambling code is used to distinguish between PDSCH and DCI format. For example, a 16-bit scrambling code can contain <1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1> or <0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1>. The scrambling code and the CRC check code are added by modulo two. Optionally, different scrambling codes may be used to indicate the TBS of the PDSCH or a fixed number of bits before or after the transmission block bit indicates the TBS of the PDSCH.

Further, in the above embodiments, the determining module 101 may be further configured to: determine, according to a preset rule, that the PDSCH is in a listening mode, or

Further, in the above embodiments, the determining module 101 may be further configured to: determine, according to a preset rule, a modulation mode of the PDSCH, or

Receiving a ninth signaling sent by the base station, and determining a modulation mode of the PDSCH according to the indication information in the ninth signaling, where the ninth signaling is at least one of: RRC signaling, PDCCH, EPDCCH, or MAC CE Signaling.

The preset rule may be at least one of the following: a channel quality range, a signal to noise ratio range, and a bit error. Rate threshold, error rate threshold, spectrum efficiency threshold.

The modulation method may include any one of the following: Gaussian minimum shift keying (GMSK), QuadriPhase Shift Keying (QPSK), 16-phase quadrature amplitude modulation (16 Quadrature) Amplitude Modulation, referred to as: 16QAM), 64 Quadrature Amplitude Modulation (64QAM)

In each of the foregoing UE embodiments, the TBS may be a subset of the TBS specified by the Long Term Evolution (LTE) protocol; and, in the foregoing embodiments, the first signaling, the second signaling, the third signaling, and the fourth signaling The fifth signaling, the sixth signaling, and the ninth signaling may be the same signaling, that is, the indication information in the foregoing multiple signaling may be included in the same signaling.

The UE described in the foregoing embodiment of the UE (the embodiment corresponding to FIG. 1, FIG. 3, and FIG. 4) may perform the technical solution corresponding to the method embodiment shown in FIG. 15 or the corresponding embodiment in the embodiment shown in FIG. The method performed by the UE.

FIG. 6 is a schematic structural diagram of Embodiment 4 of the UE according to the present invention. The UE in this embodiment reduces the control signaling overhead by changing the content of the downlink control information DCI. As shown in FIG. 6, the UE in this embodiment may include: a determining module 601 and a data transmission module 602, where

The determining module 601 is configured to determine a range of frequency resources used for the DCI indication; the determining module 601 is further configured to determine, according to the indication information in the DCI, a frequency resource used for data transmission;

A data transmission module 602 can be used to transmit data on the frequency resource for data transmission.

The data transmission module may be configured to receive downlink data sent by the base station, and may also be used to send uplink data to the base station.

The existing DCI covers the entire system bandwidth under different system bandwidths, and the resource indication overhead is too large. This embodiment considers reducing the maximum bandwidth that the DCI can indicate, thereby reducing the bits of the DCI format. To this end, you can preset or configure the maximum bandwidth or maximum bandwidth corresponding to the DCI format, for example, the bandwidth corresponding to 6 RBs. In addition to presetting or configuring the maximum bandwidth supported by the DCI, the frequency domain resource location corresponding to the DCI supporting the maximum bandwidth may be preset or configured, for example, determining the RB location. When configuring the frequency domain resource location, the LTE resource allocation type may be used, for example, Type 0 or Type 1 or Type 2 is indicated. Among them, resource allocation type 2 supports centralized and distributed resources. Source allocation. The resource allocation type 0 of the LTE is to divide the consecutive RBs into groups, and each group uses 1 bit to indicate whether to use or not; the resource allocation type 1 of LTE divides the discrete RB into several sets, and first indicates whether the set is Using, then indicating whether to use the RBs in the set; LTE resource allocation type 2, indicating the starting position and length of a continuous frequency domain resource, and supporting one RB pair located in 2 slots respectively at the same frequency Or different frequencies.

The range of the frequency resource used for the DCI indication is smaller than the current system bandwidth, and the system bandwidth is one of {1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz}, or is {6 RB, 15 RB, One of 30RB, 50RB, 75RB, 100RB}.

The UE of this embodiment determines the range of the frequency resource used for the DCI indication, that is, first determines the frequency resource corresponding to the maximum bandwidth or the maximum bandwidth that the DCI can indicate, and then determines the frequency resource used for data transmission according to the indication information in the DCI. Data transmission through the frequency resource; the frequency domain resource corresponding to the maximum bandwidth or the maximum bandwidth that the DCI can indicate is no longer the frequency domain resource corresponding to the system bandwidth or the system bandwidth, but a smaller bandwidth or smaller. The bandwidth corresponding to the frequency domain resource, so the indication information used to determine the frequency resource used for data transmission in the DCI can be reduced, that is, the content indicated by the DCI is reduced, thereby reducing signaling overhead and improving system transmission efficiency.

In the foregoing embodiment, the range of the frequency resource used for the DCI indication may be determined by using a preset or signaling manner. Therefore, the determining module 601 may be specifically configured to:

The preset first frequency resource is used as the range of the frequency resource for the DCI indication; or the seventh signaling sent by the base station is received, and the DCI is determined according to the indication information in the seventh signaling. The range of the indicated frequency resource, the seventh signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH, or medium access control MAC control element CE signaling.

FIG. 7 is a schematic structural diagram of Embodiment 5 of a UE according to the present invention. As shown in FIG. 7, the UE in this embodiment may further include:

The receiving module 603 is configured to receive a second DCI sent by the base station, where the DCI indicates a coding rate of the data.

The coding rate may be an encoding rate defined in a Modulation and Coding Scheme (MCS) or an aggregation level of resource granularity for transmitting a PDSCH.

Optionally, the determining module 601 is further configured to:

Before the data transmission module transmits data on the frequency resource for data transmission, Determining that the transport block size TBS of the data is a preset TBS, or receiving the eighth signaling sent by the base station, and determining the TBS according to the indication information in the eighth signaling, the eighth letter The command includes at least one of the following: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling.

Optionally, the determining module 601 is further configured to:

Receiving a third DCI sent by the base station, and determining a TBS in a specific modulation mode according to the indication information in the DCI, where the specific modulation mode is determined by a preset or signaling configuration.

In this way, the indication bits of the MCS can be further reduced, thereby further reducing the overhead of control signaling.

Specifically, in one mode, the modulation mode may be preset to one of QPSK, 16QAM, and 64QAM. Then, the modulation and coding scheme MCS or coding rate of the data in the modulation mode is configured to indicate the TBS, and the configuration signaling can be DCI signaling.

In another mode, the modulation mode of the data may be one of QPSK, 16QAM, and 64QAM, and the configuration signaling may be RRC signaling or MAC CE signaling. Then, the modulation and coding scheme MCS or coding rate of the data in the modulation mode is configured to indicate the TBS, and the configuration signaling can be DCI signaling.

For example, for the PDSCH, when the modulation mode of the data is limited to QPSK, the modulation coding scheme or the MCS index or the TBS index or the coding rate in the LTE existing modulation mode is multiplexed, and the MCS indication bit only needs to indicate the existing MCS. Index 0~9, that is, only 4 bits are needed to indicate the 10 states; when it is limited to 16QAM, the coding rate in the existing LTE modulation mode is multiplexed, and the MCS indication bit only needs to indicate the existing MCS index. 10~16, that is, 3 bits can indicate the 7 states; when limited to 64QAM, the coding rate in the existing LTE modulation mode is multiplexed, and the MCS indication bit only needs to indicate the existing MCS index 17~28. That is, 4 bits can indicate the 12 states.

For the PUSCH, when the modulation mode of the data is limited to QPSK, the modulation coding scheme or the MCS index or the TBS index or the coding rate in the LTE existing modulation mode is multiplexed, and the MCS indication bit only needs to indicate the index of the existing MCS. ~10, that is, only 4 bits are needed to indicate the 11 states; when limited to 16QAM, the coding rate in the existing LTE modulation mode is multiplexed, and the MCS indication bit only needs to indicate the existing MCS index 11~ 20, that is, 4 bits can indicate the 10 states; when limited to 64QAM, the coding rate in the existing LTE modulation mode is multiplexed, and the MCS indication bit only needs to indicate the existing MCS index 21~28, that is, 3 Bits can indicate this 8 states.

Optionally, the receiving module 603 is further configured to:

Receiving a second subframe configured by the base station;

The determining module 601 is further configured to determine that the common control channel is monitored in the second subframe, that is, the dedicated control channel of the UE is not monitored in the second subframe.

The common control channel includes: a control channel carrying a system message, a random access response, a paging, and a power control.

In a specific implementation, the period of the second subframe may be an integer multiple of the discontinuous reception period DRX.

The seventh signaling and the eighth signaling in the foregoing embodiments may be the same signaling, that is, the indication information in the foregoing multiple signaling may be included in the same signaling; or may be different signaling.

The UE described in the foregoing UE embodiment (the embodiment corresponding to FIG. 6 and FIG. 7) may perform the technical solution of the method embodiment shown in FIG. 19 or the method performed by the corresponding UE in FIG.

FIG. 8 is a schematic structural diagram of Embodiment 1 of a base station according to the present invention. In this embodiment, a blind detection manner is used to reduce control signaling overhead. As shown in FIG. 8, the base station in this embodiment may include: a determining module 801 and a sending module 802, where

a determining module 801, configured to determine a transport block size TBS to be sent;

The determining module 801 is further configured to determine a time domain resource and a frequency resource for transmitting a physical downlink shared channel (PDSCH), where the PDSCH is used to transmit the transport block;

The sending module 802 is configured to send the transport block to the user equipment UE on the time domain resource and the frequency resource.

The base station of this embodiment may be used for the UE side to detect the PDSCH blindly. Of course, the base station may also send the DCI at the same time, so that the UE performs detection according to the indication of the DCI. When the UE receives the data on the PDSCH by using only the blind detection mode, the DCI does not need to be sent. This manner is preferably applied to a scenario where the TBS of the data can be different from the existing DCI signaling, but the TBS of the data is This mode is also applicable to the case where the size of the existing DCI signaling is the same, which is not limited by the embodiment of the present invention.

In the base station of this embodiment, after the determining module determines the transport block size TBS, the time domain resource of the PDSCH, and the frequency resource, the sending module sends the UE to the UE on the time domain resource and the frequency resource. The transmission of the transport block enables the UE to implement blind detection of the PDSCH, so that the downlink data can be received without the indication of the DCI, and thus the control signaling overhead can be reduced, thereby improving the transmission efficiency of the system.

When the scheme for blind detection of the PDSCH is adopted, the required information is: TBS, frequency domain resources, and time domain resources. The following information will be separately described.

For the determination of the TBS, the preset may be used, or may be determined according to the manner in which the base station signaling is notified. Correspondingly, the determining module 801 may be specifically configured to:

Determining that the size of the transport block is a preset TBS; or

Generally, UEs with relatively stable services, such as MTC UEs, have a relatively fixed TBS for a long period of time. Therefore, the base station can notify the TBS of the time period by using the first signaling, and notify the new TBS by the first signaling when the TBS changes. For this purpose, a finite number of TBS values can be predefined, and then the first signalling is used to inform which TBS value is currently being used. The defined finite number of TBS values can be a subset of existing TBS tables, such as {208, 600, 872, 1000}. The first signaling used may be RRC signaling or DCI format or MAC CE or any combination therebetween. For example, the base station may use the RRC signaling indication while indicating the PDSCH carrying the RRC signaling using a DCI format such as format 1A.

Optionally, in an implementation manner, the base station may further determine a coding rate of the PDSCH, and send data according to the coding rate. Specifically, the determining module 801 is further configured to determine a coding rate for transmitting the PDSCH;

The sending module 802 is specifically configured to send the transport block to the user equipment UE according to the encoding rate on the time domain resource and the frequency resource.

The determining module 801 can be specifically configured to: The aggregation level of the resource granularity of the transmission PDSCH is determined.

Further, the determining module 801 can be specifically configured to:

The aggregation level includes any one of the following resource granularities or a multiple of any one of the following resource granularities: CCE, ECCE, REG, EREG, PRB, VRB.

Optionally, there are two ways to determine the frequency domain resource:

In the first implementation, the frequency domain resource is indicated by the resource block RB, and the determining module 801 can be specifically used to:

Sending, to the UE, the second signaling, where the second signaling includes indication information for determining a resource block RB of the PDSCH, where the second signaling is at least one of: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling.

It should be noted that the frequency resource may also be indicated by PRB or VRB. In the present invention, the resource block indicated by RB is only an example.

In the second implementation manner, the frequency domain resource is indicated by the bandwidth and the starting location. This mode is especially applicable to the scenario where the frequency domain resource is a continuous resource. The determining module 801 can be specifically configured to:

Determining the bandwidth of the transmitted PDSCH as a preset bandwidth;

Sending the third signaling to the UE, where the third signaling includes indication information for determining a first starting location of a frequency resource of the PDSCH, where the third signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

Further, in the foregoing two implementation manners, the determining module 801 can determine a larger frequency domain resource range. In a specific implementation, the UE can also determine a smaller range to detect in the larger frequency domain resource range. Therefore, the determining module 801 can be specifically configured to:

Transmitting, to the UE, the fourth signaling, where the fourth signaling includes indication information for enabling the UE to determine a second starting location of the frequency resource that is to be monitored by the PDSCH, where the fourth signaling is at least one of the following : RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

For example, the base station may first send a larger frequency resource range to the UE according to the first manner, for example: RBs numbered 6, 7, 8, 9, 10, 11, 12, 13, and then the UE sends the fourth. The signaling is used to enable the UE to determine the second starting position according to the hash function according to the second starting position of the indication information in the fourth signaling, or may not send the fourth signaling, starting from the second starting position. Blind detection, if it is determined that the second starting position is RB 7, the UE can start detecting from RB 7 up to RB 13.

Optionally, the time domain resource for transmitting the PDSCH may be determined by means of signaling or a predefined manner, so the determining module 801 may specifically be used to:

Determining that the time domain resource for transmitting the PDSCH is the preset first subframe; or

The fifth signaling sent to the UE, where the fifth signaling includes indication information for determining a first subframe of the transmission PDSCH.

For specific implementation, you can configure discontinuous reception time (Discontinuous Reception, DRX) for PDSCH transmission. Referring to FIG. 2, the UE performs PDSCH detection on a plurality of non-contiguous time intervals. In Figure 2, the UE performs blind detection of the PDSCH during the On duration of each DRX cycle. Correspondingly, the indication information in the fifth signaling may further include a discontinuous reception period and a start subframe of the discontinuous reception, an active time, where the active time includes detecting a time corresponding to an on timer / or the time corresponding to the inactivity timer.

Further, the indication information in the fifth signaling may further indicate that: the first subframe used for transmitting the PDSCH is a subframe in the active time.

FIG. 9 is a schematic structural diagram of Embodiment 2 of a base station according to the present invention. As shown in FIG. 9, the base station in this embodiment may further include: a receiving module 803, where the sending module 803 may be configured to receive an acknowledgement message ACK sent by the UE or Non-confirmation message NACK. When the base station does not receive the acknowledgment message ACK sent by the UE within the first preset time, the base station resends the transport block within a second preset time.

When the base station side receives the NACK, or when the base station does not receive the acknowledgement message ACK sent by the UE within the first preset time, the base station resends the transport block within the second preset time. The base station can distinguish between the repeatedly transmitted PDSCH (or repeatedly transmitted transport block) or the newly transmitted PDSCH (or newly transmitted transport block) by the scrambling code scrambled in the CRC. The scrambling code can be preset or configured by the base station. In addition, the base station may also start the coverage enhancement mode. For example, the PDs may be configured to transmit the same PDSCH in consecutive p subframes, where p is an integer, and the energy is used for coverage enhancement. The UE may detect the PDSCH according to the configuration in consecutive p subframes to improve the PDSCH. The success rate of data reception.

Further, the sending module 802 is further configured to:

The control channel and \ or PDSCH are transmitted to the UE in a preset search space and / or a preset first time. The control channel includes PDDCH and E-PDDCH.

The base station in this embodiment may only send a control channel to the UE in a dedicated search space of the UE or a certain period of time (or simultaneously specify a search space and a first time), or only send a PDSCH to the UE. Or transmitting the control channel and the PDSCH to the UE at the same time. Corresponding transmission modes may include the following: In the UE's dedicated search space (without limitation on time) only the control channel is transmitted; in the UE's dedicated search space (without limitation on time) only PDSCH is transmitted; dedicated search in the UE Space (no restrictions on time) Simultaneous transmission of control channel and PDSCH; Only PDSCH is transmitted in the first time of a certain period (no restrictions on the frequency domain); In the first time of a certain period (no restrictions on the frequency domain) Transmitting the PDSCH; simultaneously transmitting the control channel and the PDSCH at a certain time (without limitation on the frequency domain); transmitting only the PDSCH in the dedicated search space of the UE and at a certain time in a certain period; in the dedicated search space of the UE and at some The segment transmits only the control channel at the first time; the PDSCH and the control channel are simultaneously transmitted in the UE's dedicated search space and at a certain first time. The first time may be a predefined or configured period of time, such as one subframe or several subframes at the beginning of the discontinuous reception time period. As shown in Figure 5, the control channel and PDSCH sometimes listen at the same time, sometimes not at the same time.

When the control channel and the PDSCH are not transmitted in the same first time, they can be reduced. The number of blind detections saves the power consumption of the UE.

Further, it may be further defined that: when the sending module sends the control channel and the PDSCH in the different first time, the time interval or period of the first time of sending the control channel is greater than or less than the number of sending the PDSCH A time interval or period of time. When the time interval or period of the first time of transmitting the control channel is greater than the time interval or period of the first time of transmitting the PDSCH, it is advantageous to save signaling overhead; when the time interval of the first time of transmitting the control channel or When the period is smaller than the time interval or period of the first time when the PDSCH is sent, it is convenient to quickly switch to the signaling scheduling mode for other TBS handover or HARQ or coverage enhanced transmission mode.

Further, in an implementation manner, when the sending module 802 sends a control channel and a PDSCH to the UE in a preset search space and/or a preset first time, the control channel or the The PDSCH further includes preset first indication information, configured to enable the UE to distinguish between the control channel and the PDSCH.

In the scenario where the PDSCH and the DCI format have the same TBS and the same aggregation resource granularity, the method in the foregoing implementation manner may be adopted, that is, the explicit indication information is used to enable the UE to distinguish the control channel from the PDSCH.

Specifically, the CRC scrambled scrambling code can be used to distinguish the PDSCH from the control channel. The scrambling code is predefined or configured. For example, a 16-bit scrambling code can contain <1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1> Or <0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1>. The scrambling code and the CRC check code use the modulo two operation.

In addition, when the TBS is smaller than the DCI format, it can be compensated by the bit after the TBS. Charge 0 to make it the same size as the existing DCI format. At this time, the CRC scrambled scrambling code is used to distinguish the PDSCH from the DCI format. For example, a 16-bit scrambling code can contain <1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1> or <0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1>. The scrambling code and the CRC check code are added by modulo two. Optionally, different scrambling codes may be used to indicate the TBS of the PDSCH or to add a fixed number of bits to the TBS of the PDSCH before or after the transport block bit.

Further, in the above embodiments, the determining module 801 may be further configured to: determine, according to a preset rule, that the PDSCH is in a listening mode, or

Optionally, the sending module 802 is specifically configured to:

When the physical downlink shared channel (PDSF) is transmitted by using a non-multimedia broadcast multicast service single frequency network (MBSFN) subframe, the PDSCH is transmitted by using antenna port 0 or by using transmit diversity; When the PDSCH is transmitted using the MBSFN subframe, the PDSCH is transmitted using the antenna port port 7.

Further, in each of the foregoing base station embodiments, the determining module 801 may be further configured to: determine, according to a preset rule, a modulation mode of the PDSCH, or

Sending ninth signaling to the UE, so that the UE determines, according to the indication information in the ninth signaling,

The modulation mode of the PDSCH, the ninth signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling.

The preset rule may be at least one of the following: a channel quality range, a signal to noise ratio range, a bit error rate threshold, a packet error rate threshold, and a preset rule corresponding to a spectrum efficiency threshold.

The modulation method may include any one of the following: GMSK, QPSK, 16QAM, 64QAM. In the foregoing embodiment of the base station, the TBS may be a subset of the TBS specified by the Long Term Evolution (LTE) protocol; and, in the foregoing embodiments, the first signaling, the second signaling, the third signaling, the fourth signaling, The fifth signaling, the sixth signaling, and the ninth signaling may be the same signaling, that is, the indication information in the foregoing multiple signaling may be included in the same signaling.

The base station described in each of the foregoing base station embodiments (the embodiments corresponding to FIG. 8 and FIG. 9) To implement the technical solution of the method embodiment shown in FIG. 16 below or the method performed by the corresponding base station in FIG.

FIG. 10 is a schematic structural diagram of Embodiment 3 of a base station according to the present invention. In this embodiment, the control signaling overhead is reduced by changing the content of the DCI indication information. As shown in FIG. 10, the base station in this embodiment may include: a determining module 1001, a sending module 1002, and a data transmission module 1003, where

The determining module 1001 may be configured to determine a range of frequency resources used for the downlink control information DCI indication;

The sending module 1002 may be configured to send the DCI to the UE, so that the UE determines a frequency resource used for data transmission according to the indication information in the DCI.

The data transmission module 1003 can be configured to perform data transmission by using the frequency resource for data transmission.

The data transmission module may be configured to receive uplink data sent by the UE, and may also be used to send downlink data to the UE.

In view of the fact that the existing DCI covers the entire system bandwidth under different system bandwidths, the resource indication overhead is too large. In this embodiment, the maximum bandwidth that the DCI can indicate is reduced, thereby reducing the bits of the DCI format. To this end, you can preset or configure the maximum bandwidth or maximum bandwidth corresponding to the frequency domain resources that the DCI format can support, for example, the bandwidth corresponding to 6 RBs. In addition to presetting or configuring the frequency domain resource corresponding to the maximum bandwidth or the maximum bandwidth supported by the DCI, the frequency domain resource location corresponding to the DCI supporting the maximum bandwidth may be preset or configured, for example, determining the RB location, and when configuring the frequency domain resource location, Use LTE's resource allocation type, such as Type 0 or Type 1 or Type 2. Among them, resource allocation type 2 supports centralized and distributed resource allocation. The resource allocation type 0 of the LTE is to divide the consecutive RBs into groups, and each group uses 1 bit to indicate whether to use or not; the resource allocation type 1 of LTE divides the discrete RB into several sets, and first indicates whether the set is Using, then indicating whether the RB in the set is used; the resource allocation type 2 of the LTE is a starting position and length indicating a continuous frequency domain resource, and supports one RB pair located in two time slots at the same frequency Or different frequencies.

The range of the frequency resource used for the DCI indication is smaller than the system bandwidth, and the system bandwidth is one of {1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz}, or is {6 RB, 15 RB, 30 RB, One of 50RB, 75RB, 100RB}.

The base station in this embodiment first determines the range of the frequency resource used for the DCI indication, that is, first determines The frequency resource corresponding to the maximum bandwidth or the maximum bandwidth that the DCI can indicate, and then determining the frequency resource used for data transmission according to the indication information in the DCI, and performing data transmission on the frequency resource; the maximum bandwidth that the DCI can indicate is no longer The system bandwidth is a smaller bandwidth. Therefore, the indication information used to determine the frequency resource used for data transmission in the DCI can be reduced, that is, the content indicated by the DCI is reduced, thereby reducing signaling overhead and improving system transmission efficiency.

In the foregoing embodiment, the range of the frequency resource for the DCI indication may be determined by using a preset or signaling manner. Therefore, the determining module 1001 may be specifically configured to:

Using a preset first frequency resource as a range of frequency resources for DCI indication; or sending seventh signaling to the UE, where the seventh signaling includes determining a frequency for the DCI indication The indication information of the range of resources, the seventh signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH, or medium access control MAC control element CE signaling.

Further optionally, the sending module 1002 is further configured to:

Wherein, the coding rate can be a modulation and coding scheme (Modulation and Coding)

The coding rate defined in Scheme, referred to as MCS), or the aggregation level of the resource granularity of the PDSCH.

Optionally, the determining module 1001 is further configured to:

Determining a transport block size of the transmitted data, the TBS is a preset TBS, or

Transmitting, to the UE, eighth signaling, where the eighth signaling includes indication information for determining the TBS, where the eighth signaling includes at least one of the following: RRC signaling, MAC CE signaling, or DCI .

Optionally, the determining module 1001 is further configured to:

Specifically, in one mode, the modulation mode may be preset to one of QPSK, 16QAM, and 64QAM. Then, a modulation and coding scheme of the data in the modulation mode is configured to indicate the TBS, and the configuration signaling may be DCI signaling.

In another mode, the modulation mode of the data can be configured as QPSK, 16QAM, 64QAM. In one of the configurations, the configuration signaling may be RRC signaling or MAC CE signaling. The modulation and coding scheme of the data in the modulation mode is then configured to indicate the TBS, which may be DCI signaling.

Optionally, the sending module 1002 is further configured to:

Transmitting, by the UE, a configuration message that includes a second subframe, where the UE is instructed to listen to the common control channel in the second subframe, that is, to indicate that the UE does not monitor the UE in the second subframe. Road.

In a specific implementation, the period of the second subframe is an integer multiple of the discontinuous reception period DRX. The seventh signaling and the eighth signaling in the foregoing embodiments may be the same signaling, that is, the indication information in the foregoing multiple signaling may be included in the same signaling; or may be different signaling.

The base station described in each of the foregoing base station embodiments (the embodiment corresponding to FIG. 10) may perform the technical solution of the method embodiment shown in FIG. 20 or the method performed by the corresponding base station in FIG.

FIG. 11 is a schematic structural diagram of Embodiment 6 of a UE according to the present invention. The UE in this embodiment may receive data in a blind detection manner, thereby reducing control signaling overhead. As shown in FIG. 11, the UE 1100 of this embodiment may include: a receiver 1101, a transmitter 1102, and a processor 1103. The memory 1104 and the bus 1105 are also shown. The receiver 1101, the transmitter 1102, and the processor are shown. 1103. The memory 1104 is connected through the bus 1105 and completes communication with each other.

The bus 1105 can be an Industry Standard Architecture (Industry Standard Architecture,

ISA) Bus, Peripheral Component (PCI) bus or Extended Industry Standard Architecture (ESA) bus. The bus 1105 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 11, but it does not mean that there is only one bus or one type of bus.

Memory 1104 is for storing executable program code, the program code including computer operating instructions. Memory 1104 may include high speed RAM memory and may also include non-volatile memory, such as at least one disk memory.

The processor 1103 can be a central processing unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention. The processor 1103 is configured to determine a transport block size TBS.

The processor 1103 is further configured to determine a time domain resource and a frequency resource for transmitting a physical downlink shared channel (PDSCH), where the PDSCH is used to transmit the transport block;

The receiver 1101 is configured to receive the transport block on the time domain resource and the frequency resource.

Optionally, the processor 1101 is specifically configured to: determine that the size of the transport block is preset.

TBS; or,

Optionally, the processor 1103 is further configured to:

Determining a coding rate at which the PDSCH is transmitted;

The receiver 1101 is specifically configured to receive, according to the coding rate of the PDSCH, the transport block on the time domain resource and the frequency resource.

Optionally, the coding rate of the PDSCH includes an aggregation level of resource granularity of the PDSCH;

The processor 1103 is specifically configured to:

Optionally, the resource granularity includes any one of the following resource granularities or a multiple of any one of the following resource granularities: CCE, ECCE, REG, EREG, PRB, VRB.

Optionally, the processor 1103 is specifically configured to:

Optionally, the processor 1103 is specifically configured to: Determining the bandwidth of the PDSCH according to the configuration of the base station;

Instructing the receiver 1101 to receive the third signaling sent by the base station, and determining a first starting location of the frequency resource of the PDSCH according to the indication information in the third signaling, where the third signaling is at least one of the following: RRC Signaling, PDCCH, EPDCCH or MAC CE signaling.

Optionally, the processor 1103 is specifically configured to:

Instructing the receiver 1101 to receive the fourth signaling sent by the base station, and determining, according to the indication information in the fourth signaling, a second starting location of the frequency resource that listens to the PDSCH, where the fourth signaling is at least one of the following : _RRC signaling, PDCCH, EPDCCH or MAC CE signaling; or determining a second starting position of the frequency resource that listens to the PDSCH according to a preset hash function. Optionally, the processor 1101 is specifically configured to:

Instructing the receiver 1101 to receive the fifth signaling sent by the base station, and determining, according to the indication information in the fifth signaling, that the time domain resource for transmitting the PDSCH is the first subframe, and the fifth signaling is at least one of the following: Signaling, PDCCH, EPDCCH or MAC CE signaling; or,

Determining that the subframe of the PDSCH is a preset first subframe.

Optionally, the indication information in the fifth signaling further includes a discontinuous reception period and a start subframe of the discontinuous reception, and an active time, where the active time includes detecting a time corresponding to an on-duration timer. / or the time corresponding to the inactivity timer.

Optionally, the first subframe used for transmitting the PDSCH is a subframe in the active time. Optionally, the transmitter 1102 is configured to: after the receiver 1101 correctly receives the PDSCH, send an acknowledgement message ACK to the base station; or, after the processor 1101 determines that the PDSCH cannot be received, to the base station. A non-acknowledgement message NACK is sent.

Optionally, the receiver 1101 is further configured to:

The control channel and / or PDSCH are monitored during the search space configured by the base station and / or the first time configured by the base station.

Optionally, when the receiver 1101 monitors the control channel and the PDSCH in the different first time, the time interval of the first time of the interception control channel is greater than or less than the time of the first time of listening to the PDSCH. interval.

Optionally, the receiver 1101 is specifically configured to: when the control channel and the PDSCH are monitored in a search space configured by the base station and/or a configuration configured by the base station, distinguish the control channel and the PDSCH by using a size TBS of the transport block, or, according to Resource granularity, time domain location, frequency domain location At least one of the control channel and the PDSCH is distinguished, or the control channel and the PDSCH are distinguished according to the preset first indication information.

Optionally, the receiver 1101 is specifically configured to:

Optionally, the TBS is a subset of the TBS specified by the Long Term Evolution (LTE) protocol.

Optionally, the processor 1103 is further configured to:

Receiving a sixth signaling sent by the base station, and determining, according to the indication information in the sixth signaling,

The PDSCH is a listening mode, and the sixth signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling.

In this embodiment, the TBS may be a subset of the TBS specified by the Long Term Evolution (LTE) protocol; and, in the foregoing embodiment, the first signaling, the second signaling, the third signaling, the fourth signaling, and the fifth The signaling, the sixth signaling, and the ninth signaling may be the same signaling, that is, the indication information in the foregoing multiple signaling may be included in the same signaling.

The UE described in this embodiment may perform the method performed by the corresponding UE in FIG. 15 or FIG. 17 below.

The UE in this embodiment, the UE in this embodiment, receives the transmission on the time domain resource and the frequency resource after the processor determines the transport block size TBS, the time domain resource of the PDSCH, and the frequency resource. Therefore, the blind detection of the PDSCH can be implemented, so that the downlink data can be received without the indication of the DCI, and thus the control signaling overhead can be reduced, thereby improving the transmission efficiency of the system.

FIG. 12 is a schematic structural diagram of Embodiment 7 of the UE according to the present invention. The UE in this embodiment may reduce the control signaling overhead by changing the content of the DCI. As shown in FIG. 12, the UE 1200 of this embodiment may include: a receiver 1201, a transmitter 1202, and a processor 1203. The memory 1204 and the bus 1205 are also shown. The receiver 1201, the transmitter 1202, and the processor are shown. 1203. The memory 1204 is connected through the bus 1205 and completes communication with each other.

The bus 1205 can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an extended industrial standard. Extended Industry Standard Architecture (ESA) bus, etc. The bus 1205 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 12, but it does not mean that there is only one bus or one type of bus.

Memory 1204 is for storing executable program code, including computer operating instructions. The memory 1204 may include a high speed RAM memory and may also include a non-volatile memory such as at least one disk memory.

The processor 1203 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.

The processor 1203 is configured to determine a range of frequency resources used for the downlink control information DCI indication;

The processor 1203 is further configured to determine, according to the indication information in the DCI, a frequency resource used for data transmission;

Receiver 1201 and transmitter 1202 are configured to upload data in the frequency resource for data transmission.

Optionally, the processor 1203 is specifically configured to:

Using the preset first frequency resource as the range of the frequency resource for the DCI indication; or, instructing the receiver 1201 to receive the seventh signaling sent by the base station, and according to the indication information in the seventh signaling Determining the range of the frequency resource used for the DCI indication, where the seventh signaling is at least one of: RRC signaling, PDCCH, EPDCCH, or medium access control MAC control element CE signaling.

Optionally, the receiver 1201 is further configured to receive a second DCI sent by the base station, where the DCI indicates a coding rate of the data.

Optionally, the coding rate includes an aggregation level of resource granularity of the data.

Optionally, the processor 1203 is further configured to:

Before the receiver 1201 and the transmitter 1202 transmit data on the frequency resource for data transmission, determine that the transport block size TBS of the data is a preset TBS, or receive the eighth sent by the base station. And determining, according to the indication information in the eighth signaling, the TBS, where the eighth signaling includes at least one of the following: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling. Optionally, the processor 1203 is further configured to:

Optionally, when the system bandwidth is one of {1.4MHz, 3 MHz, 5MHz, 10MHz, 15MHz, 20MHz}, or one of {6RB, 15RB, 30RB, 50RB, 75RB, 100RB}, The range of frequency resources indicated by the DCI is less than the system bandwidth.

Optionally, the receiver 1201 is further configured to:

Receiving a second subframe configured by the base station;

The processor 1203 is further configured to instruct the receiver 1201 to determine a common control channel of the UE in the second subframe.

Optionally, the period of the second subframe is an integer multiple of the discontinuous reception period DRX.

The seventh signaling and the eighth signaling in this embodiment may be the same signaling, that is, the indication information in the foregoing multiple signaling may be included in the same signaling; or may be different signaling.

The UE of the UE embodiment may perform the technical solution of the method embodiment shown in FIG. 19 or the method performed by the corresponding UE in FIG. 21 in the following.

FIG. 13 is a schematic structural diagram of Embodiment 4 of a base station according to the present invention. The base station in this embodiment may use the method of blind detection by the UE to send data, thereby reducing control signaling overhead. As shown in FIG. 13, the base station 1300 of this embodiment may include: a receiver 1301, a transmitter 1302, and a processor 1303. The memory 1304 and the bus 1305 are also shown. The receiver 1301, the transmitter 1302, and the processor 1303. The memory 1304 is connected through the bus 1305 and completes communication with each other.

The bus 1305 can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (ESA) bus. The bus The 1305 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 13, but it does not mean that there is only one bus or one type of bus.

Memory 1304 is for storing executable program code, including computer operating instructions. Memory 1304 may include high speed RAM memory and may also include non-volatile memory, such as at least one disk memory.

The processor 1303 can be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

The processor 1303 is configured to determine a transport block size TBS to be sent;

The processor 1303 is further configured to determine a time domain resource and a frequency resource for transmitting a physical downlink shared channel PDSCH, where the PDSCH is used to transmit the transport block;

The transmitter 1302 is configured to send the transport block to the user equipment UE on the time domain resource and the frequency resource.

Optionally, the processor 1303 is specifically configured to:

Determining that the size of the transport block is a preset TBS; or

Instructing the sender 1302 to send the first signaling to the UE, where the first signaling includes indication information for determining a transport block size TBS, where the first signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or Medium Access Control MAC Control Element CE Signaling.

Optionally, the processor 1303 is further configured to:

Determining a coding rate of the PDSCH;

The transmitter 1302 is specifically configured to send the transport block to the user equipment UE according to the coding rate of the PDSCH on the time domain resource and the frequency resource.

Optionally, the coding rate of the PDSCH includes an aggregation level of the resource granularity of the PDSCH; the processor 1303 is specifically configured to:

The aggregation level of the resource granularity of the PDSCH includes a subset of the aggregation level of the resource granularity CCE of the physical downlink control channel PDCCH or the resource granularity ECCE of the enhanced physical downlink control channel EPDCCH, or an aggregation level of the resource granularity of the PDSCH At least included Aggregation level 6.

Optionally, the aggregation level includes any one of the following resource granularities or a multiple of any one of the following resource granularities: CCE, ECCE, REG, EREG, PRB, VRB.

Optionally, the processor 1303 is specifically configured to:

Instructing the transmitter 1302 to send the second signaling to the UE, where the second signaling includes indication information for determining a resource block RB of the PDSCH, where the second signaling is at least one of the following: RRC signaling , PDCCH, EPDCCH or MAC CE signaling.

Optionally, the processor 1303 is specifically configured to:

Determining the bandwidth of the transmitted PDSCH as a preset bandwidth;

Instructing the transmitter 1302 to send the third signaling to the UE, where the third signaling includes indication information for determining a first start position of a frequency resource of the PDSCH, where the third signaling is at least one of the following: RRC Signaling, PDCCH, EPDCCH or MAC CE signaling.

Optionally, the processor 1303 is further configured to:

Instructing the transmitter 1302 to send fourth signaling to the UE, where the fourth signaling includes indication information for causing the UE to determine a second starting location of the frequency resource that listens to the PDSCH, where the fourth The signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling.

Optionally, the processor 1303 is specifically configured to:

The fifth signaling sent by the sender 1302 to the UE is indicated, where the fifth signaling includes indication information for determining a first subframe for transmitting a PDSCH.

Optionally, the first subframe used for transmitting the PDSCH is a subframe in the active time.

Optionally, the receiver 1301 is configured to receive an acknowledgement message ACK or a non-acknowledgement message NACK sent by the UE.

Optionally, when the base station does not receive the acknowledgement message ACK sent by the UE in the first preset time, the base station resends the transport block in a second preset time. Optionally, the transmitter 1302 is further configured to:

Optionally, when the transmitter 1302 sends the control channel and the PDSCH in the different first time, the time interval of the first time of sending the control channel is greater than or less than the time of sending the PDSCH. interval.

Optionally, when the transmitter 1302 sends a control channel and a PDSCH to the UE in a preset search space and/or a preset first time, the control channel or the PDSCH further includes a pre- The first indication information is used to enable the UE to distinguish between the control channel and the PDSCH.

Optionally, the processor 1303 is further configured to:

Instructing the transmitter 1302 to send the sixth signaling to the UE, where the sixth signaling includes indication information for determining that the PDSCH is a listening mode, and the sixth signaling is at least one of the following: Order, PDCCH, EPDCCH or MAC CE signaling.

Optionally, the transmitter 1302 is specifically configured to:

When the PDSCH is transmitted using the MBSFN subframe, the PDSCH is transmitted using the antenna port port 7.

In the embodiment of the base station, the first signaling, the second signaling, the third signaling, the fourth signaling, the fifth signaling, the sixth signaling, and the ninth signaling may be the same signaling, that is, The same signaling includes indication information in the foregoing multiple signaling.

The base station of this embodiment may perform the technical solution of the method embodiment shown in FIG. 16 or the method performed by the corresponding base station in FIG. 17 in the following.

In the base station of this embodiment, after the processor determines the transport block size TBS, the time domain resource of the PDSCH, and the frequency resource, the sending module sends the transport block to the UE on the time domain resource and the frequency resource, thereby enabling the UE The blind detection of the PDSCH can be implemented, so that the downlink data can be received without the indication of the DCI, and thus the control signaling overhead can be reduced, thereby improving the transmission efficiency of the system. FIG. 14 is a schematic structural diagram of Embodiment 5 of a base station according to the present invention. The base station in this embodiment may reduce control signaling overhead by changing the content of the DCI. As shown in FIG. 14, the base station 1400 of this embodiment may include: a receiver 1401, a transmitter 1402, and a processor 1403. The memory 1404 and the bus 1405 are also shown. The receiver 1401, the transmitter 1402, and the processor are shown. 1403. The memory 1404 is connected through the bus 1405 and completes communication with each other.

The bus 1405 can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (ESA) bus. The bus 1405 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 14, but it does not mean that there is only one bus or one type of bus.

Memory 1404 is for storing executable program code, including computer operating instructions. Memory 1404 may include high speed RAM memory and may also include non-volatile memory, such as at least one disk memory.

The processor 1403 can be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

The processor 1403 is configured to determine a range of frequency resources used for the downlink control information DCI indication.

The transmitter 1402 is configured to send the DCI to the user equipment UE, so that the UE determines a frequency resource used for data transmission according to the indication information in the DCI.

The transmitter 1402 and the receiver 1401 are configured to perform data transmission by using the frequency resource for data transmission.

Optionally, the processor 1403 is specifically configured to:

Using the preset first frequency resource as the range of the frequency resource for the DCI indication; or, instructing the transmitter 1402 to send the seventh signaling to the UE, where the seventh signaling includes determining the The indication information for the range of the frequency resource indicated by the DCI, the seventh signaling is at least one of the following: _RRC signaling, PDCCH, EPDCCH, or medium access control MAC control element CE signaling.

Optionally, the transmitter 1402 is further configured to:

Transmitting, to the UE, a second DCI, where the second DCI includes An indication of the encoding rate.

Optionally, the coding rate indicated by the second DCI includes an aggregation level indicated by the DCI. Optionally, the processor 1403 is further configured to:

Determining a transport block size of the transmission data, the TBS is a preset TBS, or

Instructing the sender 1402 to send the eighth signaling to the UE, where the eighth signaling includes indication information for determining the TBS, where the eighth signaling includes at least one of the following: RRC signaling, MAC CE signaling or DCI.

Optionally, the processor 1403 is further configured to:

The transmitter 1402 is instructed to send a third DCI to the UE, where the third DCI includes indication information for determining a TBS in a specific modulation mode.

Optionally, when the system bandwidth is one of {1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz}, or one of {6RB, 15RB, 30RB, 50RB, 75RB, 100RB}, the The frequency range indicated by the DCI is less than the system bandwidth.

Optionally, the transmitter 1402 is further configured to:

The base station of this embodiment may perform the technical solution of the method embodiment shown in FIG. 20 or the method performed by the corresponding base station in FIG.

The base station in this embodiment first determines the range of the frequency resource used for the DCI indication, that is, first determines the frequency resource corresponding to the maximum bandwidth or the maximum bandwidth that the DCI can indicate, and then determines the frequency resource used for data transmission according to the indication information in the DCI. Data transmission through the frequency resource; since the maximum bandwidth that the DCI can indicate is no longer the system bandwidth, but a smaller bandwidth, the indication information used in the DCI to determine the frequency resource used for data transmission can be reduced. That is, the content indicated by the DCI is reduced, thereby reducing signaling overhead and improving system transmission efficiency.

15 is a flowchart of Embodiment 1 of a data transmission method according to the present invention. The execution body of this embodiment is The UE may perform a data transmission method in cooperation with the base station. As shown in FIG. 15, the data transmission method in this embodiment may include:

Step 1501: The UE determines a transport block size TBS.

Step 1502: The UE determines to transmit a time domain resource and a frequency resource of a physical downlink shared channel PDSCH, where the PDSCH is used to transmit the transport block.

Step 1503: The UE receives the transport block on the time domain resource and the frequency resource. In this embodiment, the UE may blindly detect the PDSCH according to the determined TBS, the time domain resource of the transmission PDSCH, and the frequency resource. Of course, the UE may also perform detection according to the indication of the DCI. When the data on the PDSCH is received only by blind detection, the indication of the DCI is not required.

In this embodiment, after determining the transport block size TBS, the time domain resource for transmitting the PDSCH, and the frequency resource, the UE receives the transport block on the time domain resource and the frequency resource, thereby enabling blind detection of the PDSCH, thereby enabling blind detection of the PDSCH. The downlink data can be received without the indication of DCI, so the control signaling overhead can be reduced, thereby improving the transmission efficiency of the system.

FIG. 16 is a flowchart of Embodiment 2 of a data transmission method according to the present invention. The execution entity of this embodiment is a base station, and may perform a data transmission method in cooperation with the UE. As shown in FIG. 16, the data transmission method of this embodiment may include:

Step 1601: The base station determines a transport block size TBS to be sent;

Step 1602: The base station determines to transmit a time domain resource and a frequency resource of a physical downlink shared channel PDSCH, where the PDSCH is used to transmit the transport block;

Step 1603: The base station sends the transport block to the UE on the time domain resource and the frequency resource.

In this embodiment, after determining the transport block size TBS, the time domain resource for transmitting the PDSCH, and the frequency resource, the base station sends the transport block to the UE on the time domain resource and the frequency resource, so that the PDSCH can be blindly detected. Therefore, downlink data can be received without an indication of DCI, and thus control signaling overhead can be reduced, thereby improving transmission efficiency of the system.

FIG. 17 is a signaling flowchart of Embodiment 3 of a data transmission method according to the present invention. The body is a base station and a UE. As shown in FIG. 17, the data transmission method in this embodiment may include: Step 1701: The base station determines a transport block size TBS to be sent.

Step 1702: The UE determines a transport block size TBS to be received.

The TBS may be a subset of the TBS specified by the Long Term Evolution (LTE) protocol.

Step 1701 and step 1702 may be performed simultaneously, or may not be performed at the same time, and there is no order.

Step 1703: The base station determines a time domain resource and a frequency resource for transmitting a PDSCH, where the PDSCH is used to transmit the transport block.

Step 1704: The UE determines a time domain resource and a frequency resource for transmitting a PDSCH, where the PDSCH is used to transmit the transport block.

Step 1703 and step 1704 may be performed simultaneously, or may not be performed at the same time, and there is no order.

Step 1705: The base station sends the transmission block to the UE on the time domain resource and the frequency resource.

Correspondingly, the UE receives the transport block on the time domain resource and the frequency resource. In this embodiment, after determining the transport block size TBS, the time domain resource for transmitting the PDSCH, and the frequency resource, the base station and the UE respectively send the transport block to the UE on the time domain resource and the frequency resource, so that the PDSCH can be implemented. The blind detection enables the downlink data to be received without the indication of the DCI, so that the control signaling overhead can be reduced, thereby improving the transmission efficiency of the system.

Optionally, for the determination of the TBS, the TBS of the PDSCH may be preset or used for signaling.

Specifically, the determining, by the base station, the TBS may include:

The base station sends first signaling to the UE, where the first signaling includes indication information for determining a transport block size TBS.

Correspondingly, the UE determines a transport block size TBS, including:

Determining, by the UE, that the size of the transport block is a preset TBS; or The UE receives the first signaling sent by the base station, and determines the size TBS of the transport block according to the indication information in the first signaling.

The first signaling may be at least one of the following: RRC signaling, PDCCH, EPDCCH, or medium access control MAC control element CE signaling.

The preset TBS may be one or more, and the TBS used herein may be a subset of the existing TBS table or a newly added TBS. When multiple TBSs are predefined, signaling can be used to indicate which TBS to use for blind detection.

When the TBS is limited to 1000 bits or less, the existing TBS values can be multiplexed according to the following table:

Generally, a UE with a relatively stable service, such as an MTC UE, has a relatively fixed TBS for a relatively long period of time. Therefore, the base station can notify the TBS of the time period by using the first signaling, and notify the new TBS by the first signaling when the TBS changes. For this purpose, a finite number of TBS values can be predefined, and then the first signalling is used to inform which TBS value is currently being used. The defined finite number of TBS values may be a subset of existing TBS tables, such as {208, 600, 872, 1000}. The first signaling used may be RRC signaling or DCI format or MAC CE or any combination therebetween. For example, the base station may use RRC signaling indication while using a DCI format such as format 1A to indicate the PDSCH carrying the RRC signaling.

Optionally, in addition to the foregoing TBS, time domain resources, and frequency domain resources, the coding rate may also be determined. Specifically, the method may further include: determining, by the base station and the UE, a coding rate of the PDSCH, respectively, the base station transmitting, according to the coding rate of the PDSCH, the coding rate to the UE on the time domain resource and the frequency resource a transport block; the UE receives the transport block according to an encoding rate of the PDSCH on the time domain resource and the frequency resource.

And transmitting the coding rate of the PDSCH may include: transmitting an aggregation level of the resource granularity of the PDSCH. The transmission of the transport block of the PDSCH may be performed using one or more aggregates of resource granularity. FIG. 18 is a schematic diagram of resource granularity and aggregation level, and resource granularity used in the embodiment of the present invention. It may be REG or EREG, CCE or ECCE, RB or PRB or VRB or N REG or N EREG or N CCEs or N ECCEs or N RBs (or PRBs or VRBs) in an LTE system, where N is a natural number. The aggregation level used may be level 1, level 2, level 4, level 6, level 8, level 16, level 32, or a subset thereof as shown in FIG.

In an implementation manner, the resource granularity includes any one of the following resource granularities or a multiple of any one of the following resource granularities: CCE, ECCE, REG, EREG, PRB, VRB.

For determining the aggregation level, the determining, by the base station, the aggregation level of the resource granularity of the PDSCH, may include:

Determining, by the base station, that the aggregation level of the resource granularity of the PDSCH is a preset aggregation level; or, the base station sends an aggregation level configuration message to the UE, so that the UE determines, according to the configuration message, a resource for transmitting the PDSCH. The level of aggregation of the granularity.

Correspondingly, the determining, by the UE, the aggregation level of the resource granularity of transmitting the PDSCH may include: determining, by the UE, an aggregation level of the resource granularity of transmitting the PDSCH according to the configuration of the base station; or determining, by the UE, an aggregation level of the resource granularity of transmitting the PDSCH The default aggregation level. The aggregation level of the resource granularity of the PDSCH is: the resource granularity CCE of the physical downlink control channel PDCCH or the aggregation level of the resource granularity ECCE of the enhanced physical downlink control channel EPDCCH, or the aggregation level of the transmission PDSCH is at least Contains aggregation level 6.

For the coding mode of the channel, the transport block can be coded (or decoded) using convolutional coding or Turbo coding, and then rate matched (or aggregated level detection) according to the aggregation level and the corresponding resource granularity. Among them, convolutional coding has lower complexity than Turbo code, which is beneficial to UE complexity/power consumption reduction. Turbo coding has better performance than convolutional coding because it exceeds the number of bits of the transport block to be encoded. For example, at 400 bits, Turbo coding is better than convolutional coding by about ldB. Therefore, the coding mode of the transport block can be predefined or configured. For example, when the complexity is mainly considered, the convolutional coding can be predefined or configured by signaling; when the coding is selected according to the performance, the channel coding mode can be determined according to the transport block size. Convolutional coding is used when the transport block size is below a certain value, and Turbo coding is used when the transport block size is higher than a certain value. The encoding process of the transport block is as follows: Add CRC, channel coding (convolutional coding or Turbo coding), rate matching, and coded output to the transmission block.

Optionally, for the frequency domain resource, the frequency domain resource or location of the transmission PDSCH may be predefined or notified by signaling. There are two ways to indicate the frequency domain resource: One is to use RB. The indication, one is indicated by the way of bandwidth and starting position.

When the frequency domain resource is indicated by RB,

Correspondingly, the determining, by the UE, the frequency resource for transmitting the PDSCH may include:

The UE determines that the resource block RB of the PDSCH is the preset resource block RB; or the UE receives the second signaling sent by the base station, and determines the resource block for transmitting the PDSCH according to the indication information in the second signaling. RB, the second signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling.

When the frequency domain resource is indicated by the bandwidth and the starting location, this method is especially applicable to the scenario where the frequency domain resource is a continuous resource.

The determining, by the base station, the frequency resource for transmitting the PDSCH may include:

Determining, by the base station, that the resource block RB of the PDSCH is the preset resource block RB; or, the base station sends the second signaling to the UE, where the second signaling includes the resource block RB for determining the PDSCH Instructions.

The UE receives the third signaling sent by the base station, and determines a first starting location of the frequency resource of the PDSCH according to the indication information in the third signaling.

The third signaling may be at least one of the following: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling.

The foregoing process may determine a larger frequency domain resource range. In a specific implementation, the UE may also determine a smaller range to detect in the larger frequency domain resource range.

The determining, by the base station, the frequency resource for transmitting the PDSCH, the method further includes: the base station sending the fourth signaling to the UE, where the fourth signaling includes a second start for determining, by the UE, the frequency resource that listens to the PDSCH Location information.

Correspondingly, the determining, by the UE, the frequency resource for transmitting the PDSCH, the method further includes: receiving, by the UE, the fourth signaling sent by the base station, and determining, according to the indication information in the fourth signaling, the frequency resource that listens to the PDSCH The second starting position. Or the UE determines, according to a preset hash function, a second starting position of the frequency resource that listens to the PDSCH.

The fourth signaling may be at least one of the following: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling. Specifically, the bandwidth of the frequency domain resource for transmitting the PDSCH may be predefined or configured, for example, the bandwidth corresponding to the bandwidth of 6 RB is predefined. The search space is defined as a set of possible frequency domain locations of the PDSCH, that is, a set of candidate frequency domain locations, which are distributed over the configured bandwidth. The starting position of the PDSCH search space may be configured by the fourth signaling, and the UE performs blind detection according to a predefined or configured aggregation level from the starting position. The starting position of the PDSCH search space may also be dynamically changed. In this case, the UE may determine according to a hash function. The method of determining the frequency domain location of the PDSCH according to the hash function is similar to determining the frequency domain location of the PDCCH or the EPDCCH. Methods. For example, the method can include:

In subframe k, for a predefined or configured PDSCH PRB set p (corresponding to the frequency domain position mentioned above), the resource granularity included or corresponding to the set m of frequency domain locations of the candidate PDSCH is: + i

L is an aggregation level, which is a subset of the EPDCCH aggregation level or an aggregation level of 6. The EPDCCH aggregation level is {1, 2, 4, 8, 16, 32}.

Where _e is the number of PDSCH resource granularities included in the subframe k PDSCH PRB set p; = 0,..., Ll ; m = 0,l, ...M -l; M is the UE corresponding to the PRB set p corresponding aggregation The number of candidates (locations) to be monitored or blindly detected when the level is L.

The variable ^ is defined as =(^ . — J touch dZ) , Υ _ρ> _, = n _Rmi ≠ 0 , = 39827 , A = 39829 , ο = 65537 and fc = L« _s /2" , RNTI is UE The assigned identifier, /3⁄4 is the slot number within one frame, and takes one of 0 to 19.

The time domain resources for transmitting the PDSCH can be determined by signaling notification or pre-configuration.

Specifically, the determining, by the base station, the time domain resource for transmitting the PDSCH may include:

Determining, by the base station, that the time domain resource for transmitting the PDSCH is the preset first subframe; or the fifth signaling sent by the base station to the UE, where the fifth signaling includes determining the transmission

The indication information of the first subframe of the PDSCH.

Correspondingly, the UE determining the time domain resource for transmitting the PDSCH may include:

The UE receives the fifth signaling sent by the base station, and determines, according to the indication information in the fifth signaling, that the time domain resource for transmitting the PDSCH is the first subframe, or the UE determines that the subframe of the PDSCH is The first subframe of the preset. Or MAC CE signaling.

For specific implementation, you can configure discontinuous reception time (Discontinuous Reception, DRX) for PDSCH transmission. Referring to FIG. 2, the UE may perform PDSCH detection on a plurality of non-contiguous time intervals. In Figure 2, the UE performs blind detection of the PDSCH during the On duration of each DRX cycle. Correspondingly, the indication information in the fifth signaling may further include a discontinuous reception period and a start subframe of the discontinuous reception, an active time, where the active time may include detecting a time corresponding to an on timer And/or the time corresponding to the inactivity timer ( inactivity timer ).

In this manner, the indication information in the fifth signaling further includes a discontinuous reception period and a start subframe of the discontinuous reception, and an active time, where the active time includes a corresponding activity timer (on duration timer). Time and/or time corresponding to the inactivity timer.

Further, the first subframe used for transmitting the PDSCH is a subframe in the active time. The non-contiguous period may be a discontinuous reception period for the PDCCH configuration or an extension thereof. For example, the discontinuous reception period for transmitting the PDSCH may be an integer multiple of the non-contiguous reception period for transmitting the PDCCH.

The subframe number corresponding to the start subframe can be obtained from the following formula: [ SFN * 10) + subframe number] modulo (DRX-Cycle) = drxStartOffset. In the formula, SFN is the system frame number, the range is 0~xx, the subframe number is 0~9, DRX-Cycle is the period of discontinuous reception of PDSCH, the DRX-Cycle finger can be configured by the base station, and drxStartOffset is defined as DRX. The subframe at which the cycle starts can be configured by the base station.

The active time represents the time when the UE needs to blindly detect the PDSCH. It can include at least the time on which the on duration timer runs or the time the inactivity timer runs. The time when the Inactivity timer is running indicates the time when the UE needs to perform continuous detection after receiving the PDSCH. When the UE does not detect the PDSCH within the timer time value and exceeds the configured time value, the UE enters the DRX cycle, or when the UE enters the DRX cycle. Upon receiving a MAC signaling configured for DRX, the UE enters a DRX cycle. In addition to long periods, there may be a short DRX cycle. At this time, the UE may enter a short period first, and does not receive the PDSCH in a short period and enters the long DRX cycle.

Further, whether the UE successfully detects the PDSCH blindly can be confirmed in the following manner. One is that the UE sends an ACK to the base station after detecting the subframe of the PDSCH, and the ACK is sent to the base station for confirmation. If the base station does not receive the ACK acknowledgement within the preset time, the UE may continue to send. The PDSCH is transmitted, for example, in an n+k+m subframe, and at this time, the PDSCH is transmitted at a lower code rate or higher aggregation level. A duplicate PDSCH (or a repeatedly transmitted transport block) or a new PDSCH (or a newly transmitted transport block) can be distinguished by a scrambling code that is scrambled in the CRC. The scrambling code can be preset or configured by the base station. If the time when the ACK is not received exceeds a certain threshold, the base station may also start the coverage enhancement mode. For example, the consecutive PD subframes may be configured to transmit the same PDSCH to accumulate energy for coverage enhancement, and the UE performs PDSCH for consecutive p subframes according to the configuration. Detection to improve the success rate of data reception. Where n, k, m, p are all integers.

For the UE, after the UE receives the transport block according to the coding rate on the time domain resource and the frequency resource, the UE may further include:

Correspondingly, after the base station sends the transport block to the UE on the time domain resource and the frequency resource, the base station further includes:

The third embodiment of the data transmission method and the various implementation manners thereof describe the downlink data transmission by using the blind detection PDSCH. In the following implementation manner, the UE is supported in a specific search space and/or a specific first time. Retreat to the manner in which the PDSCH is received according to the indication of the control channel.

Specifically, the base station may send a control channel and/or a PDSCH to the UE in a preset search space and/or a preset first time. The control channels include PDDCH and E-PDDCH.

Correspondingly, the UE monitors the control channel and/or the PDSCH in a search space configured by the base station and a first time configured by the base station.

The control channel may be sent only to the UE in a dedicated search space of the UE or a certain period of time (or simultaneously specify a search space and a first time), or only the PDSCH may be sent to the UE, or simultaneously The UE transmits a control channel and a PDSCH. Corresponding transmission modes may include the following: In the UE's dedicated search space (without limitation on time) only the control channel is transmitted; in the UE's dedicated search space (without limitation on time) only PDSCH is transmitted; dedicated search in the UE Space (no restrictions on time) simultaneous transmission of control channels and PDSCH; During the first time of a certain period (no restrictions on the frequency domain), only the PDSCH is transmitted; in the first time of a certain period (no restriction on the frequency domain), only the PDSCH is transmitted; in the first time of a certain period (there is no restriction on the frequency domain) Transmitting the control channel and the PDSCH simultaneously; transmitting only the PDSCH in the dedicated search space of the UE and at a certain time in a certain period; transmitting only the control channel in the dedicated search space of the UE and at a certain time in a certain period; in the dedicated search space of the UE and The PDSCH and the control channel are simultaneously transmitted at a certain time. The first time may be a predefined or configured period of time, such as one subframe or several subframes located at the beginning of the discontinuous reception time period. As shown in Figure 5, the control channel and the PDSCH sometimes listen at the same time, sometimes not at the same time.

Further, it may be further defined that: when the base station sends the control channel and the PDSCH in the different first time, the time interval or period of the first time of sending the control channel is greater than or less than the first time of sending the PDSCH. Time interval or period. When the time interval or period of the first time of transmitting the control channel is greater than the time interval or period of the first time of transmitting the PDSCH, it is advantageous to save signaling overhead; when the time interval of the first time of transmitting the control channel or When the period is smaller than the time interval or period of the first time when the PDSCH is sent, it is convenient to quickly switch to the signaling scheduling mode for other TBS handover or HARQ or coverage enhanced transmission mode.

Further, in an implementation manner, when the base station sends a control channel and a PDSCH to the UE in a preset search space and/or a preset first time, the control channel or the PDSCH The method further includes preset first indication information, configured to enable the UE to distinguish between the control channel and the PDSCH.

When the transport block size is the same as the existing DCI format size, it can be aggregated by using a different resource granularity than the DCI format or a different time-frequency resource location or an explicit indication. the difference.

Further, in each of the foregoing embodiments, the base station may determine, according to a preset rule, that the PDSCH is in a listening mode, or send a message to the UE, whether the PDSCH that is currently transmitted is a monitoring module, that is, whether the UE side needs to perform blind detection. Six signaling notifies the UE that the PDSCH is in a listening mode.

Correspondingly, the UE may determine that the PDSCH is in the listening mode according to the preset rule, or receive the sixth signaling sent by the base station, and determine, according to the indication information in the sixth signaling, that the PDSCH is in the listening mode.

The sixth signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling. When RRC signaling is used, an enable enable signaling can be configured for configuration.

In addition, when the base station transmits the PDSCH, the PDSCH may be transmitted by using the MBSFN subframe or the PDSCH by using the non-MBSFN subframe. When the PDSCH is transmitted by using the non-MBSFN subframe, the PDSCH may be sent by using the antenna port 0 or using the transmit diversity. When the PDSCH is transmitted using the MBSFN subframe, the PDSCH may be transmitted using the antenna port port 7. Further, in the foregoing method embodiment, the method may further include:

Determining, by the base station and the UE, the modulation mode of the PDSCH according to a preset rule, or

The UE receives the ninth signaling sent by the base station, and determines the modulation mode of the PDSCH according to the indication information in the ninth signaling, where the ninth signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling.

The preset rule may be at least one of the following: a channel quality range, a signal to noise ratio range, a bit error rate threshold, a packet error rate threshold, and a spectrum efficiency threshold.

For example, the UE may determine whether the PDSCH is the specific modulation mode according to whether the channel quality range of the PDSCH is in a channel quality range corresponding to a specific modulation mode.

The modulation method may include any one of the following: GMSK, QPSK, 16QAM, 64QAM. In the above method embodiment, the TBS may be a subset of the TBS specified by the Long Term Evolution (LTE) protocol; and, in the foregoing embodiments, the first signaling, the second signaling, the third signaling, the fourth signaling, The fifth signaling, the sixth signaling, and the ninth signaling may be the same signaling, that is, the indication information in the foregoing multiple signaling may be included in the same signaling.

FIG. 19 is a flowchart of Embodiment 4 of a data transmission method according to the present invention. The execution body of this embodiment is

The UE may perform the data transmission method in cooperation with the base station. In this embodiment, the overhead of the control signaling is reduced by reducing the indication information of the DCI. As shown in FIG. 19, the data transmission method of this embodiment may include:

Step 1901: The UE determines a range of frequency resources used for the DCI indication.

Step 1902: The UE determines a frequency resource used for data transmission according to the indication information in the DCI.

Step 1903: The UE transmits data on the frequency resource used for data transmission.

In this embodiment, the UE determines the frequency resource corresponding to the maximum bandwidth or the maximum bandwidth that the DCI can indicate, and then determines the frequency resource used for data transmission according to the indication information in the DCI, and performs data transmission by using the frequency resource; Since the maximum bandwidth that the DCI can indicate is no longer the system bandwidth, but a smaller bandwidth, the indication information for determining the frequency resource used for data transmission in the DCI can be reduced, that is, the content indicated by the DCI is reduced, thereby being able to be reduced. Signaling overhead, improving the efficiency of system transmission.

FIG. 20 is a flowchart of Embodiment 5 of the data transmission method of the present invention. The execution entity of this embodiment is a base station, and may perform a data transmission method with the UE. In this embodiment, the DCI indication message is reduced. The way of reducing the control signaling overhead. As shown in FIG. 20, the data transmission method in this embodiment may include:

Step 2001: The base station determines a range of frequency resources used for the DCI indication.

Step 2002: The base station sends the DCI to the UE, so that the UE determines a frequency resource used for data transmission according to the indication information in the DCI.

Step 2003: The base station performs data transmission by using the frequency resource used for data transmission. In the method of the embodiment, the base station first determines the range of the frequency resource used for the DCI indication, that is, first determines the frequency resource corresponding to the maximum bandwidth or the maximum bandwidth that the DCI can indicate, and then determines the frequency used for data transmission according to the indication information in the DCI. Resource, data transmission through the frequency resource; since the maximum bandwidth or maximum bandwidth that the DCI can indicate is no longer the system bandwidth, but a smaller bandwidth, the indication in the DCI for determining the frequency resource used for data transmission The information can be reduced, that is, the content indicated by the DCI is reduced, thereby reducing signaling overhead and improving system transmission efficiency.

FIG. 21 is a signaling flowchart of Embodiment 6 of the data transmission method of the present invention. The execution subject of this embodiment is a base station and a UE. As shown in FIG. 21, the method in this embodiment may include:

Step 2101: The base station determines a range of frequency resources used for the DCI indication.

Step 2102: The UE determines a range of frequency resources used for the DCI indication.

There is no order relationship between step 2101 and step 2102.

Step 2103: The base station sends the DCI to the UE.

Step 2104: The UE determines a frequency resource used for data transmission according to the indication information in the DCI.

The DCI information is carried by the PDCCH or the EPDCCH, and the UE obtains information in the DCI by detecting and decoding the PDCCH or the EPDCCH.

Step 2105: The base station and the UE transmit data on the frequency resource used for data transmission.

The data transmission here includes the UE receiving the downlink data sent by the base station, and the UE transmitting the uplink data to the base station. That is, the channel carrying the data may be a PDSCH and a Physical Uplink Shared Channel (PUSCH).

Compared with the DCI of the prior art, this embodiment reduces the indication content in the DCI, thereby reducing the number of indication bits included in the DCI. Specifically, in the case that the existing DCI covers the entire system bandwidth under different system bandwidths, the resource indication overhead is too large, and the embodiment considers reducing the maximum DCI indication. The frequency resource corresponding to the bandwidth or the maximum bandwidth, thereby reducing the bits of the DCI format. To this end, you can preset or configure the maximum bandwidth or maximum bandwidth corresponding to the DCI format, for example, the bandwidth corresponding to 6 RBs. In addition to presetting or configuring the frequency resource corresponding to the maximum bandwidth or the maximum bandwidth supported by the DCI, the frequency domain resource location corresponding to the DCI supporting the maximum bandwidth may be preset or configured, for example, determining the RB location, and may be used when configuring the frequency domain resource location. The resource allocation type of LTE, such as type 0 or type 1 or type 2, is indicated. Resource allocation type 2 supports centralized and distributed resource allocation. The resource allocation type 0 of the LTE is to divide the consecutive RBs into groups, and each group uses 1 bit to indicate whether to use or not; the resource allocation type 1 of LTE divides the discrete RB into several sets, and first indicates whether the set is Using, then indicating whether to use the RBs in the set; LTE resource allocation type 2, indicating the starting position and length of a continuous frequency domain resource, and supporting one RB pair located in 2 slots respectively at the same frequency Or different frequencies.

In the method of the embodiment, the base station and the UE first determine the range of the frequency resource used for the DCI indication, that is, first determine the maximum bandwidth or the maximum bandwidth corresponding to the DC resource, and then determine the data transmission according to the indication information in the DCI. Frequency resource, data transmission through the frequency resource; since the maximum bandwidth that the DCI can indicate is no longer the system bandwidth, but a smaller bandwidth, the indication information used in the DCI to determine the frequency resource used for data transmission It can be reduced, that is, the content indicated by the DCI can be reduced, thereby reducing the signaling overhead and improving the efficiency of system transmission.

In the foregoing embodiment, the range of the frequency resource used for the DCI indication may be determined by using a preset or signaling manner. Therefore, for the step 2101, the base station may use the preset first frequency resource as the DCI. The range of the indicated frequency resource; or the base station sends the seventh signaling to the UE, where the seventh signaling includes indication information for determining a range of the frequency resource for the DCI indication.

Correspondingly, for the step 2102, the UE may use the preset first frequency resource as the range of the frequency resource for the DCI indication; or, receive the seventh signaling sent by the base station, and according to the seventh letter The indication information in the order determines the range of frequency resources used for the DCI indication.

The seventh signaling may be at least one of the following: RRC signaling, PDCCH, EPDCCH Or medium access control MAC control element CE signaling.

Further, in the above embodiment, the TBS and the encoding rate of the data may also be preset or configured. When the TBS is predefined or configured, the transport block may be transmitted with different aggregation levels or resource granularity for the PDSCH or the PUSCH to support different code rates and save MCS signaling overhead. In this case, signaling may be used for aggregation. Level notifications, for example, can be used to support indications of aggregation levels 1, 2, 4, 8, 16, 32, etc., using 3 bits.

Specifically, the base station may further send a second DCI to the UE, where the second DCI includes indication information for indicating a coding rate of the data.

Before the UE transmits data on the frequency resource used for data transmission, the method further includes: the UE receiving a second DCI sent by the base station, where the DCI indicates a coding rate of the data, that is, a PDSCH or a PUSCH The encoding rate.

The coding rate may be an aggregation level of resource granularity of the data, or a coding rate defined in a Modulation and Coding Scheme (MCS). The coding rate indicated by the second DCI includes an aggregation level indicated by the DCI.

Optionally, the base station may further determine that the transport block size TBS of the transmission data is a preset TBS, or the base station sends an eighth signaling to the UE, where the eighth signaling includes Determining the indication information of the TBS.

Correspondingly, before the UE transmits data on the frequency resource used for data transmission, the method further includes:

Determining, by the UE, that a transport block size TBS of the data is a preset TBS, or

The UE receives the eighth signaling sent by the base station, and determines the TBS according to the indication information in the eighth signaling.

The eighth signaling may include at least one of the following: RRC signaling, PDCCH, EPDCCH, or MAC CE signaling.

Optionally, the base station may further determine a TBS in a specific modulation mode, and send a third DCI to the UE, so that the UE determines the TBS in a specific modulation mode according to the indication information in the DCI.

Receiving a third DCI sent by the base station, and determining, according to the indication information in the DCI TBS in fixed modulation mode.

Wherein, the specific modulation mode is specifically determined by which modulation mode can be determined by preset or signaling configuration.

That is, in the above embodiments, the modulation and coding scheme of the data may also be preset or configured or a combination of preset and configuration. This method reduces the MCS indication bits by defining the modulation scheme indicated by the MCS in the DCI.

In one mode, the modulation mode may be preset to one of QPSK, 16QAM, and 64QAM. The modulation and coding scheme (MCS) or coding rate of the data in the modulation mode is then configured to indicate the TBS, which may be DCI signaling.

In another mode, the modulation mode of the data may be one of QPSK, 16QAM, and 64QAM, and the configuration signaling may be RRC signaling or MAC CE signaling. The modulation and coding scheme (MCS) or coding rate of the data in the modulation mode is then configured to indicate the TBS, which may be DCI signaling.

For the PUSCH, when the modulation mode of the data is limited to QPSK, the modulation coding scheme or the MCS index or the TBS index or the coding rate in the LTE existing modulation mode is multiplexed, and the MCS indication bit only needs to indicate the index of the existing MCS. ~10, that is, only 4 bits are needed to indicate the 11 states; when limited to 16QAM, the coding rate in the existing LTE modulation mode is multiplexed, and the MCS indication bit only needs to indicate the existing MCS index 11~ 20, that is, 4 bits can indicate the 10 states; when limited to 64QAM, the coding rate in the existing LTE modulation mode is multiplexed, and the MCS indication bit only needs to indicate the existing MCS index 21~28, that is, 3 The bits can indicate the 8 states.

The following describes the three resource allocation types for LTE, and the method described in this embodiment is used. Method, the change in the amount of information in the DCI.

In the first example, DCI format 1 with resource allocation types of 0 and 1 supporting LTE is taken as an example. Assume that the system bandwidth is 10 MHz, that is, 50 RB, and the duplex mode is FDD.

Before changing the DCI format1 content, the information included in the DCI and the number of bytes occupied are as follows: Resource allocation header: 1 bit;

Resource block allocation: 18 bits;

Modulation and coding scheme: 5 bits;

HARQ process number: 3 bits;

New data indication: 1 bit;

Redundancy version: 2 bits;

PUCCH transmission power control command: 2 bits;

HARQ resource offset indication: 2 bits;

A total of 34 bits.

Applying the method of this embodiment, the range of the frequency resource indicated by the DCI is set to 6 RB. The content in DCI formatl can be different for different resource sizes that are predefined or configured, as described below.

In the first mode, the RB is the resource granularity, and the corresponding bandwidth or the number of RBs is W RB, where the value is 6 (corresponding to the range of the frequency resource indicated by the DCI is 6 RB), and the content of the DCI format1 can be changed to :

Resource allocation header: 1 bit;

Resource block allocation: 6 bits;

Modulation and coding scheme: 3 bits;

HARQ process number: 3 bits;

New data indication: 1 bit;

Redundancy version: 2 bits;

PUCCH transmission power control command: 2 bits;

HARQ resource offset indication: 2 bits;

A total of 20 bits. According to the existing DCI constraint, when the number of DCI bits is 20, it needs to be zero-padded and becomes 21 bits.

In the second mode, with 1 ECCE as the resource granularity, the range of the frequency resource indicated by the DCI The relationship between the ECCE group size and the number of ECCEs of the resource allocation type 0 is also as follows:

Then for the ECCE group

/PI fixed bandwidth is 6RB corresponding to the number of ECCE is ^E^CE is 24, so ECCE group P=2, the number of bits required is ^N CC ^IP

_y Bay ijDCI formatl content can be changed to ί source allocation header: 1 bit;

ί source block allocation: 12 bits;

Modulation and coding scheme: 3 bits;

HARQ process number: 3 bits;

New data indication: 1 bit;

Redundancy version: 2 bits;

PUCCH transmission power control command: 2 bits;

HARQ resource offset indication: 2 bits;

A total of 26 bits. According to the existing DCI constraint, when the number of DCI bits is 26, it needs to be zero-padded and becomes 27 bits.

In the third mode, the two ECCEs are used as the resource granularity, and the range of the frequency resources indicated by the DCI is also 6 RB. The correspondence between the ECCE group size and the number of ECCEs of the resource allocation type 0 is as shown in the following table.

'P When the fixed bandwidth is 6 RB, the number of corresponding ECCEs is 12, so the ECCE group P=2, the number of bits needed, the content of the IjDCI formatl can be changed.

Modulation and coding scheme: 3 bits;

HARQ process number: 3 bits;

New data indication: 1 bit;

Redundancy version: 2 bits;

PUCCH transmission power control command: 2 bits;

HARQ resource offset indication: 2 bits;

A total of 20 bits. According to the existing DCI constraint, when the number of DCI bits is 20, it needs to be zero-padded and becomes

21 bits.

In the second example, DCI formatlA supporting resource allocation type 2 is taken as an example. Assume that the system bandwidth is 10 MHz, that is, 50 RB, FDD duplex mode, and the DCI content change before and after the overhead is reduced.

Before changing the content of DCI format1A, the information included in the DCI and the number of bytes occupied are as follows: Format0/1A distinguishes: 1 bit;

Centralized/distributed VRB allocation identifier: 1 bit;

Resource allocation: "l ₀ g ₂ ( ^L ( ^l +l)/2)] = "log ₂ (50 *(50 + l)/2), = ll bits;

MCS: 5 bits;

Number of HARQ processes: 3 bits;

New data indication: 1 bit;

Redundancy version: 2 bits;

PUCCH power control command: 2 bits;

HARQ-ACK resource offset: 2 bits;

A total of 28 bits.

Applying the method of this embodiment, the range of the frequency resource indicated by the DCI is set to 6 RB. For different resource granularities predefined or configured, the content in DCI formatl can include:

In the first mode, the RB is the resource granularity, and the corresponding bandwidth or the number of RBs is W, where the value is 6 (corresponding to the range of the frequency resource indicated by the DCI, 6 RB), and the content of the DCI formatl can be changed to:

Format0/1A distinction: 1 bit; Centralized/distributed VRB allocation identifier: 1 bit;

Resource allocation: "log ₂ (A (A + l)/2)] = "log ₂ (6*(6 + l)/2)] = 5 bits;

MCS: 3 bits;

Number of HARQ processes: 3 bits;

New data indication: 1 bit;

Redundancy version: 2 bits;

PUCCH power control command: 2 bits;

HARQ-ACK resource offset: 2 bits;

In the second mode, one ECCE is used as the resource granularity, the corresponding number of ECCEs is N _E ^ _E , the fixed bandwidth is 6 RBs, and 24 ECCEs are included, and the corresponding number of resource allocation bits is “log ₂ (N _E ^D _c ^L _CE (N _E ^D _c ^L _CE +l)/2)] = "l.g ₂ (N _E ^D _c ^L _CE (N _E ^D _c ^L _CE +l)/2)] = "l.g ₂ (24*(24 + l)/2), = 9 bits.

The IJDCI formatl content can be changed to:

Format0/1A distinction: 1 bit;

Centralized/distributed VRB allocation identifier: 1 bit;

Resource allocation: 9 bits;

MCS: 3 bits;

Number of HARQ processes: 3 bits;

New data indication: 1 bit;

Redundancy version: 2 bits;

PUCCH power control command: 2 bits;

HARQ-ACK resource offset: 2 bits;

A total of 24 bits.

In the third mode, the number of frequency resources indicated by the DCI is 6 RB, and the number of the corresponding resource allocation bits is "1". _{§ 2} «^.«^. +1)/2)1 = riog ₂ (N _E ^D _c ^L _CEG (N _E ^D _c ^L _CEG +1)/2)] = Γΐο _§2 (12*(12 + 1 ) / 2) 1 = 7 bits, the content of the IJDCI formatl can be changed to:

Format0/1A distinction: 1 bit;

Centralized/distributed VRB allocation identifier: 1 bit; Resource allocation: 9 bits;

MCS: 3 bits;

Number of HARQ processes: 3 bits;

New data indication: 1 bit;

Redundancy version: 2 bits;

PUCCH power control command: 2 bits;

HARQ-ACK resource offset: 2 bits;

A total of 24 bits.

In the third example, taking UL DCI format O as an example, analyze the DCI signaling changes caused by limiting the maximum supported bandwidth, such as 6RB, combined with the changed content:

Assuming that the duplex mode is FDD, the system bandwidth is 10 MHz or 50 RBs.

With RB as the resource granularity, before changing the DCI format O content, the information included in the DCI and the number of bytes occupied are as follows:

Format0/1A distinguishes the identifier: 1 bit;

Frequency hopping identifier: 1 bit;

Resource block allocation and frequency hopping resource allocation | log ₂ (A (A +l)/2) |= "log ₂ (50*(50 + l)/2)] = ll bits;

MCS: 5 bits;

New data indication: 1 bit;

Scheduled PUSCH power control command: 2 bits;

Demodulation pilot period offset and orthogonal code index: 3 bits;

Channel status information request: 1 bit;

A total of 25 bits.

Applying the method of this embodiment, the range of the frequency resource indicated by the DCI is set to 6 RB.

In the first mode, the resource granularity is RB, and the corresponding bandwidth or number of RBs is N, where the value is 6, and the content of ijDCI formatO can be changed to:

The number or composition of bits after FormatO supports bandwidth and MCS content is:

Format0/1 A distinguishes the identifier: 1 bit;

Frequency hopping identifier: 1 bit;

Resource block allocation and frequency hopping resource allocation | log ₂ (A (A +l)/2) |=“log ₂ (6* (6 + l)/2)] = 5 ratio Special

MCS: 3 bits;

New data indication: 1 bit;

Scheduled PUSCH power control command: 2 bits;

Demodulation pilot period offset and orthogonal code index: 3 bits;

Channel status information request: 1 bit;

A total of 17 bits.

In the second mode, one ECCE is used as the resource granularity, the corresponding number of _ECCEs is Λ^ _εΕ , the fixed bandwidth is 6 RBs, and 24 _{ECCEs are} included, and the corresponding resource block allocation and frequency hopping resource allocation bits are

+Ι) )] = "l.g ₂ (24* (24 + l)/2), = 9 bits.

The IJDCI formatl content can be changed to:

Format0/1 A distinguishes the identifier: 1 bit;

Frequency hopping identifier: 1 bit;

Resource block allocation and frequency hopping resource allocation 9 bits;

MCS: 3 bits;

New data indication: 1 bit;

Scheduled PUSCH power control command: 2 bits;

Demodulation pilot period offset and orthogonal code index: 3 bits;

Channel status information request: 1 bit;

A total of 21 bits.

In the third mode, the two ECCEs are used as the resource granularity, or the ECCEG, that is, the ECCE group contains two ECCEs, and the corresponding ECCEG number is N _E ^u _e L _eEe , and the fixed bandwidth is 6 RBs, including 24 _ECCEs . , the number of corresponding ECCEG is 12, then the corresponding number of resource allocation bits is riog ₂ (N _E ^U c ^L _CEG (N _E ^U c ^L cEo + l) 2) l = "l.g ₂ (12*(12 + l)/2), = 7 bits.

The IJDCI formatl content can be changed to:

Format0/1 A distinguishes the identifier: 1 bit;

Frequency hopping identifier: 1 bit;

Resource block allocation and frequency hopping resource allocation 7 bits;

MCS: 3 bits;

New data indication: 1 bit; Scheduling PUSCH power control command: 2 bits;

Demodulation pilot period offset and orthogonal code index: 3 bits;

Channel status information request: 1 bit;

A total of 19 bits.

In the above example, the DCI considers the value of the other indication bits including the resource allocation bits. The DCI of the present invention includes at least resource allocation bits and may also include one or more other indication bits in the DCI. The indication information not included in the DCI can be configured through predefined or higher layer signaling such as RRC or MAC CE.

The following two examples are used to illustrate the case where no other indication bits are included.

In the first example, for DCI formt O, the maximum supported bandwidth is limited to 6 RB. In the first mode, the resource granularity is RB, and the corresponding bandwidth or number of RBs is N, where the value is 6, and ijDCI The content of formatO can be changed to:

Resource block allocation bits: | log ₂ (N (N + l) / 2) | = "l ₀ g ₂ (6 * (6 + l)/2), = 5 bits; total 5 bits at this time.

If a new data indicator bit is superimposed, the total number of bits is 6 bits.

In the second example, for DCI formt 0, the maximum supported frequency resource range is 2 RB. In addition to the above-mentioned indication method, it may be considered to use a bit bitmap to indicate, and the 2-bit corresponding state may be 00, 01, 10, 11, can set the bit to 1 to indicate the corresponding RB, and the bit to 0 means that the corresponding RB is not configured.

As can be seen from the above example, with the method of this embodiment, the proportion of the indication content in the DCI can be reduced, so that the signaling overhead can be saved relative to the prior art.

Optionally, in the foregoing embodiment, semi-persistent scheduling or permanent scheduling or non-dynamic scheduling may also be introduced, and the DCI indication of the specific UE is not included in the non-dynamic scheduling indication period. Semi-persistent scheduling means that the initial transmission of the PDSCH or the PUSCH occurs in a certain period, for example, once in 20 ms. Only the PDSCH or the PUSCH when the semi-persistent scheduling is started initially has a corresponding DCI indication, and the subsequent PDSCH or PUSCH that does not appear in a certain period has no DCI. The indication is therefore called semi-persistent scheduling. However, once a certain initial PDSCH or PUSCH transmission error occurs, that is, after the receiver detects an error and returns a NACK to the sender, the sender may send a DCI to perform a HARQ retransmission scheduling indication. Since some applications such as M2M may have a long service transmission interval, such as a minute level or an hour level, the UE may perform discontinuous reception or idle state between 2 transmission times to facilitate power saving. It is therefore conceivable to make the periods of non-dynamic scheduling correspond to the periods of DRX, such as to have the same period. The current DRX cycle supports a maximum of 2.56 s. Therefore, the period of the above non-dynamic scheduling may be equal to the extended DRX cycle, for example, may be set to an integral multiple of the DRX cycle.

In the non-dynamic scheduling period, when there is no HARQ retransmission, in order to ensure relatively reliable transmission, the base station may configure a lower code rate and modulation mode for the PDSCH or the PUSCH during initial scheduling, when a certain amount of erroneous packets are accumulated. It can be solved by high-level retransmission, such as ARQ. When there is HARQ retransmission, the uplink or downlink retransmission is initiated according to the feedback from the receiving end received by the transmitting end. For PUSCH transmission, the UE may perform retransmission after receiving a Physical HARQ Indicator Channel (PHICH) channel or a PDCCH or EPDCCH channel indication on the downlink. For PDSCH transmission, the UE may receive a PDCCH or EPDCCH channel on the downlink indicating the retransmitted PDSCH. In order to reduce the signaling overhead caused by the PDCCH or the EPDCCH indicating retransmission, the method for reducing the indication information of the DCI in the above embodiment may also be employed.

Specifically, the method in the foregoing embodiment may further include:

The UE receives the second subframe configured by the base station, and the UE monitors the public control channel in the second subframe, that is, the UE does not monitor the dedicated control channel of the UE in the second subframe.

Further, it is also possible to limit the period of the second subframe to an integer multiple of the discontinuous reception period DRX.

The seventh signaling and the eighth signaling in the foregoing embodiment may be the same signaling, that is, the indication information in the foregoing multiple signaling may be included in the same signaling; or different signaling may be used.

FIG. 22 is a schematic structural diagram of Embodiment 1 of the system according to the present invention. As shown in FIG. 22, the system in this embodiment may include: the UE described in any one of FIG. 1, FIG. 2 to FIG. 4, and FIG. 8 or FIG. The base station of the illustrated embodiment; or the UE described in the embodiment shown in FIG. 11 and the base station described in the embodiment shown in FIG.

FIG. 23 is a schematic structural diagram of Embodiment 2 of the system of the present invention. As shown in FIG. 23, the system in this embodiment may include: the UE in the embodiment shown in FIG. 6 or FIG. 7 and the base station in the embodiment shown in FIG. 10; The UE described in the embodiment shown in FIG. 12 and the base station described in the embodiment shown in FIG.

It will be understood by those skilled in the art that all or part of the steps of implementing the above method embodiments may be performed by hardware related to the program instructions. The aforementioned program can be stored in a calculation The machine can be read from the storage medium. When the program is executed, the steps including the foregoing method embodiments are performed; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

claims

1. A user equipment UE, characterized by: including:

Determination module for determining the transport block size TBS;

The determination module is also used to determine the time domain resources and frequency resources for transmitting the physical downlink shared channel PDSCH, where the PDSCH is used to transmit the transport block;

A receiving module, configured to receive the transmission block on the time domain resource and frequency resource.

2. The UE according to claim 1, wherein the determining module is specifically configured to: determine the size of the transport block to be a preset TBS; or,

Receive the first signaling sent by the base station, and determine the size of the transport block TBS according to the indication information in the first signaling, where the first signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or medium Access control MAC control element CE signaling.

3. The UE according to claim 1, wherein the determining module is further used to: determine the coding rate for transmitting the PDSCH;

The receiving module is specifically configured to receive the transport block according to the coding rate of the PDSCH on the time domain resources and frequency resources.

4. The UE according to claim 3, wherein the coding rate of the PDSCH includes an aggregation level of resource granularity of the PDSCH;

The determination module is specifically used for:

Determine the aggregation level of resource granularity for transmitting PDSCH according to the configuration of the base station; or, determine the aggregation level of resource granularity for transmitting PDSCH to a preset aggregation level;

Wherein, the aggregation level of resource granularity for transmitting PDSCH includes: a subset of the aggregation level of resource granularity CCE for transmitting physical downlink control channel PDCCH or the resource granularity ECCE for transmitting enhanced physical downlink control channel EPDCCH, or, the aggregation level of transmitting PDSCH is at least Contains aggregation level 6.

5. The UE according to claim 4, wherein the resource granularity includes any one of the following resource granularities or a multiple of any one of the following resource granularities: CCE, ECCE, REG, EREG, PRB, VRB.

6. The UE according to claims 1 to 5, characterized in that the determination module is specifically used to: determine that the resource block RB for transmitting PDSCH is a preset resource block RB; or,

Receive the second signaling sent by the base station, and determine the transmission according to the indication information in the second signaling Resource block RB of PDSCH, and the second signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

7. The UE according to any one of claims 1 to 5, characterized in that the determination module is specifically used for:

Determine the bandwidth of PDSCH according to the configuration of the base station;

Receive the third signaling sent by the base station, and determine the first starting position of the frequency resource of the PDSCH according to the indication information in the third signaling, where the third signaling is at least one of the following: RRC signaling, PDCCH , EPDCCH or MAC CE signaling.

8. The UE according to claim 6 or 7, characterized in that the determining module is specifically used to:

Receive the fourth signaling sent by the base station, and determine the second starting position for monitoring the frequency resource of the PDSCH according to the indication information in the fourth signaling, where the fourth signaling is at least one of the following: RRC signaling , PDCCH, EPDCCH or MAC CE signaling; or,

The second starting position of the frequency resource for monitoring the PDSCH is determined according to a preset hash function.

9. The UE according to claim 1, wherein the determining module is specifically configured to: receive the fifth signaling sent by the base station, and determine the time domain for transmitting the PDSCH according to the indication information in the fifth signaling. The resource is the first subframe, and the fifth signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or MAC CE signaling; or,

The subframe of the PDSCH is determined to be the preset first subframe.

10. The UE according to claim 9, wherein the indication information in the fifth signaling also includes a discontinuous reception cycle, a starting subframe of discontinuous reception, and an activity time, and the activity time includes detection activity. The time corresponding to the timer and/or the time corresponding to the inactive timer.

11. The UE according to claim 10, wherein the first subframe used for transmitting PDSCH is a subframe within the active time.

12. The UE according to any one of claims 1 to 11, further comprising: a sending module, configured to send an acknowledgment message ACK to the base station after the receiving module correctly receives the PDSCH; or, When the determination module determines that the PDSCH cannot be received, it sends a non-acknowledgment message NACK to the base station.

13. The UE according to any one of claims 1 to 12, further comprising: a monitoring module, configured to monitor the search space configured by the base station and\or the first time configured by the base station. Listen to control channel and\or PDSCH.

14. The UE according to claim 13, wherein when the monitoring module monitors the control channel and the PDSCH in different first times, the time interval of the first time to monitor the control channel is greater than Or the time interval is less than the first time of monitoring the PDS CH.

15. The UE according to claim 14, wherein the monitoring module is specifically configured to: when monitoring the control channel and PDSCH in the search space configured by the base station and/or within the time configured by the base station configuration, pass the size of the transport block The TBS distinguishes the control channel and the PDSCH, or distinguishes the control channel and the PDSCH according to at least one of resource granularity, time domain position, and frequency domain position, or distinguishes the control channel and the PDSCH according to preset first indication information.

16. The UE according to claim 15, characterized in that the monitoring module is specifically configured to: distinguish DCI and PDSCH according to the scrambling code of cyclic redundancy check CRC or, according to the new addition in the DCI The first indication information in the indication bit or the original bit is used to distinguish the control channel and the PDSCH.

17. The UE according to any one of claims 1 to 16, wherein the TBS is a subset of TBS specified by the Long Term Evolution LTE protocol.

18. The UE according to any one of claims 1 to 17, characterized in that the determining module is also used to:

Determine that the PDSCH is in monitoring mode according to preset rules, or,

Receive the sixth signaling sent by the base station, and determine that the PDSCH is in the listening mode according to the indication information in the sixth signaling, where the sixth signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

19. A user equipment UE, characterized by including:

The determination module is used to determine the range of frequency resources indicated by the downlink control information DCI; the determination module is also used to determine the frequency resources used for data transmission according to the indication information in the DCI;

A data transmission module, configured to transmit data on the frequency resources used for data transmission.

20. The UE according to claim 19, wherein the determining module is specifically configured to: use a preset first frequency resource as a range of frequency resources for DCI indication; or, receive a frequency resource sent by the base station. Seventh signaling, and determining the range of frequency resources for DCI indication according to the indication information in the seventh signaling, where the seventh signaling is at least one of the following: RRC Signaling, PDCCH, EPDCCH or medium access control MAC control element CE signaling.

21. The UE according to claim 19 or 20, further comprising: a receiving module, configured to receive the second DCI sent by the base station, the DCI indicating the coding rate of the data.

22. The UE according to claim 21, wherein the coding rate includes an aggregation level of resource granularity of the data.

23. The UE according to any one of claims 19 to 21, characterized in that the determining module is also used to:

Before the data transmission module transmits data on the frequency resource for data transmission, determine the transmission block size TBS of the data to be the preset TBS, or receive the eighth signaling sent by the base station, and The TBS is determined according to the indication information in the eighth signaling, and the eighth signaling includes at least one of the following: RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

24. The UE according to any one of claims 19 to 21, characterized in that the determining module is also used to:

Receive the third DCI sent by the base station, and determine the TBS under a specific modulation method according to the indication information in the DCI, and the specific modulation method is determined through preset or signaling configuration.

25. The UE according to any one of claims 19 to 24, characterized in that:

When the system bandwidth is one of {1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz}, or one of {6RB, 15RB, 30RB, 50RB, 75RB, 100RB}, the frequency used for DCI indication The scope of the resource is less than the stated system bandwidth.

26. The UE according to any one of claims 19 to 25, characterized in that the receiving module is also used to:

Receive the second subframe configured by the base station;

The determining module is also configured to determine the common control channel for monitoring the UE in the second subframe.

27. The UE according to claim 26, wherein the period of the second subframe is an integer multiple of the discontinuous reception period DRX.

28. A base station, characterized by including:

Determination module, used to determine the transport block size TBS to be sent;

The determination module is also used to determine the time domain resources and frequency resources for transmitting the physical downlink shared channel PDSCH, where the PDSCH is used to transmit the transport block; A sending module, configured to send the transmission block to the user equipment UE on the time domain resources and frequency resources.

29. The base station according to claim 28, wherein the determining module is specifically configured to: determine the size of the transmission block to be a preset TBS; or,

Send first signaling to the UE, where the first signaling includes indication information for determining the transport block size TBS, where the first signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or medium access Incoming control MAC control element CE signaling.

30. The base station according to claim 28, characterized in that the determination module is also used to: determine the coding rate of the PDSCH;

The sending module is specifically configured to send the transport block to the user equipment UE according to the coding rate of the PDSCH on the time domain resources and frequency resources.

31. The base station according to claim 30, characterized in that the coding rate of PDSCH includes an aggregation level of resource granularity of the PDSCH;

The determination module is specifically used for:

Determine that the aggregation level of resource granularity for transmitting PDSCH is a preset aggregation level; or, send an aggregation level configuration message to the UE, so that the UE determines the aggregation level of resource granularity for transmitting PDSCH according to the configuration message;

Wherein, the aggregation level of the resource granularity of the PDSCH includes a subset of the aggregation level of the resource granularity CCE of the physical downlink control channel PDCCH or the resource granularity ECCE of the enhanced physical downlink control channel EPDCCH, or the aggregation level of the resource granularity of the PDSCH Contains at least aggregation level 6.

32. The base station according to claim 31, wherein the aggregation level includes any one of the following resource granularities or a multiple of any of the following resource granularities: CCE, ECCE, REG, EREG, PRB, VRB.

33. The base station according to claims 28 to 32, characterized in that the determination module is specifically used for:

Determine the resource block RB for transmitting PDSCH to be the preset resource block RB; or,

Send second signaling to the UE, where the second signaling includes indication information for determining the resource block RB of the PDSCH, and the second signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

34. The base station according to any one of claims 28 to 32, characterized in that the determination module is specifically used for:

Determine the bandwidth for transmitting PDSCH to be the preset bandwidth;

Send third signaling to the UE, where the third signaling includes indication information for determining the first starting position of the frequency resource of the PDSCH, where the third signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

35. The base station according to claim 33 or 34, characterized in that the determining module is also used to:

Send fourth signaling to the UE, where the fourth signaling includes indication information for the UE to determine a second starting position for monitoring the frequency resource of the PDSCH, where the fourth signaling is at least one of the following: : RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

36. The base station according to claim 28, wherein the determining module is specifically configured to: determine that the time domain resource for transmitting PDSCH is the preset first subframe; or,

The fifth signaling sent to the UE includes indication information for determining the first subframe in which the PDSCH is transmitted.

37. The base station according to claim 36, wherein the indication information in the fifth signaling also includes a discontinuous reception cycle, a starting subframe of discontinuous reception, and an activity time, and the activity time includes detection activity. The time corresponding to the timer and/or the time corresponding to the inactive timer.

38. The base station according to claim 37, characterized in that the first subframe used to transmit the PDSCH is a subframe within the active time.

39. The base station according to any one of claims 28 to 38, further comprising: a receiving module, configured to receive an acknowledgment message ACK or a non-acknowledgment message NACK sent by the UE.

40. The base station according to claim 39, characterized in that, when the base station does not receive the acknowledgment message ACK sent by the UE within the first preset time, the base station restarts the process within the second preset time. Send the transport block.

41. The base station according to any one of claims 28 to 40, characterized in that the sending module is also used to:

In the preset search space and/or the preset first time, send the control channel and/or PDSCH to the UE.

42. The base station according to claim 41, characterized in that when the sending module is respectively When the control channel and the PDSCH are sent in different first times, the time interval of the first time of sending the control channel is greater or smaller than the time interval of the first time of sending the PDSCH.

43. The base station according to claim 41 or 42, characterized in that when the sending module sends the control channel and PDSCH to the UE in the preset search space and/or the preset first time, The control channel or the PDSCH also includes preset first indication information, which is used to enable the UE to distinguish the control channel and the PDSCH.

44. The base station according to any one of claims 28 to 43, characterized in that the TBS is a subset of TBS specified by the Long Term Evolution LTE protocol.

45. The base station according to any one of claims 28 to 44, characterized in that the determination module is also used to:

Determine that the PDSCH is in monitoring mode according to preset rules, or,

Send sixth signaling to the UE, where the sixth signaling includes indication information for determining that the PDSCH is in listening mode, and the sixth signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

46. The base station according to any one of claims 28 to 45, characterized in that the sending module is specifically used for:

When a non-MBSFN subframe is used to transmit the physical downlink shared channel PDSCH, antenna port 0 or transmit diversity is used to transmit the PDSCH;

When the MBSFN subframe is used to transmit PDSCH, antenna port port 7 is used to transmit the PDSCH.

47. A base station, characterized by including:

Determining module, used to determine the range of frequency resources indicated by the downlink control information DCI; Transmitting module, used to send the DCI to the user equipment UE, so that the UE determines the frequency resource used for the data according to the indication information in the DCI. Frequency resources for transmission;

A data transmission module, configured to use the frequency resources used for data transmission for data transmission.

48. The base station according to claim 47, wherein the determining module is specifically configured to: use a preset first frequency resource as a range of frequency resources for DCI indication; or, send a first frequency resource to the UE. Seven signaling, the seventh signaling includes indication information used to determine the range of frequency resources used for DCI indication, the seventh signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or medium Access control MAC control element CE signaling.

49. The base station according to claim 47 or 48, wherein the sending module is further configured to: send a second DCI to the UE, the second DCI including an indication indicating the coding rate of the data. information.

50. The base station according to claim 49, wherein the coding rate indicated by the second DCI includes an aggregation level indicated by the DCI.

51. The base station according to any one of claims 47 to 49, characterized in that the determination module is also used to:

Determine the transmission block size TBS of the transmission data to be the preset TBS, or,

Send eighth signaling to the UE, where the eighth signaling includes indication information for determining the TBS, where the eighth signaling includes at least one of the following: RRC signaling, MAC CE signaling, or DCI. .

52. The base station according to any one of claims 47 to 49, characterized in that the determination module is also used to:

Determine the TBS under the specific modulation mode of the transmitted data, and the specific modulation mode is determined by preset or signaling configuration;

Send a third DCI to the UE, where the third DCI includes indication information for determining the TBS under a specific modulation mode.

53. The base station according to any one of claims 47 to 52, characterized in that:

When the system bandwidth is one of {1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz}, or one of {6RB, 15RB, 30RB, 50RB, 75RB, 100RB}, the frequency used for DCI indication The range is less than the stated system bandwidth.

54. The base station according to any one of claims 47 to 53, characterized in that the sending module is also used to:

Send a configuration message including the second subframe to the UE, used to instruct the UE to monitor the common control channel of the UE in the second subframe.

55. The base station according to claim 54, wherein the period of the second subframe is an integer multiple of the discontinuous reception period DRX.

56. A data transmission method, characterized by including:

User Equipment UE determines the transport block size TBS;

The UE determines the time domain resources and frequency resources for transmitting the physical downlink shared channel PDSCH, and the PDSCH is used to transmit the transport block; The UE receives the transport block on the time domain resource and frequency resource.

57. The method according to claim 56, characterized in that the UE determines the transmission block size TBS, including:

The UE determines that the size of the transport block is a preset TBS; or,

The UE receives the first signaling sent by the base station, and determines the size of the transport block TBS according to the indication information in the first signaling. The first signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or Medium Access Control MAC Control Element CE signaling.

58. The method according to claim 56, further comprising: the UE determining a coding rate for transmitting PDSCH;

The UE receiving the transmission block on the time domain resource and the frequency resource includes: the UE receiving the transmission block on the time domain resource and the frequency resource according to the coding rate.

59. The method according to claim 58, wherein transmitting the coding rate of the PDSCH includes transmitting an aggregation level of resource granularity of the PDSCH;

The UE determines the coding rate for transmitting PDSCH, including:

The UE determines the aggregation level of resource granularity for transmitting PDSCH according to the configuration of the base station; or, the UE determines that the aggregation level of resource granularity for transmitting PDSCH is a preset aggregation level; wherein, the aggregation level of resource granularity for transmitting PDSCH includes: A subset of the aggregation level of the resource granularity CCE for transmitting the physical downlink control channel PDCCH or the resource granularity ECCE for transmitting the enhanced physical downlink control channel EPDCCH, or the aggregation level for transmitting the PDSCH includes at least aggregation level 6.

60. The method according to claim 59, characterized in that the resource granularity includes any one of the following resource granularities or a multiple of any one of the following resource granularities: CCE, ECCE, REG, EREG, PRB, VRB.

61. The method according to claims 56 to 60, characterized in that the UE determines the transmission

PDSCH frequency resources include:

The UE determines that the resource block RB for transmitting PDSCH is a preset resource block RB; or, the UE receives the second signaling sent by the base station, and determines the resource block for transmitting PDSCH according to the indication information in the second signaling. RB, the second signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

62. The method according to any one of claims 56 to 60, wherein the UE determines the frequency resource for transmitting PDSCH, including:

The UE determines the bandwidth of the PDSCH according to the configuration of the base station;

The UE receives the third signaling sent by the base station, and determines the first starting position of the frequency resource of the PDSCH according to the indication information in the third signaling, where the third signaling is at least one of the following: RRC signaling signaling, PDCCH, EPDCCH or MAC CE signaling.

63. The method according to claim 61 or 62, wherein the UE determines the frequency resource for transmitting PDSCH, and further includes:

The UE receives the fourth signaling sent by the base station, and determines a second starting position for monitoring the frequency resource of the PDSCH according to the indication information in the fourth signaling, where the fourth signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or MAC CE signaling; or,

The UE determines the second starting position of the frequency resource for monitoring the PDSCH according to the preset hash function.

64. The method according to claim 56, wherein the UE determines the time domain resource for transmitting PDSCH, including:

The UE receives the fifth signaling sent by the base station, and determines that the time domain resource for transmitting the PDSCH is the first subframe according to the indication information in the fifth signaling, and the fifth signaling is at least one of the following: RRC signaling signaling, PDCCH, EPDCCH or MAC CE signaling, or the UE determines that the subframe of the PDSCH is a preset first subframe.

65. The method according to claim 64, wherein the indication information in the fifth signaling also includes a discontinuous reception cycle, a starting subframe of discontinuous reception, and an activity time, and the activity time includes detection activity The time corresponding to the timer and/or the time corresponding to the inactive timer.

66. The method according to claim 65, wherein the first subframe used for transmitting PDSCH is a subframe within the active time.

67. The method according to any one of claims 56 to 66, characterized in that, after the UE receives the transport block on the time domain resource, the frequency resource and according to the coding rate, it further includes: :

When the UE correctly receives the PDSCH, the UE sends an acknowledgment message ACK to the base station; or, when the UE determines that it cannot receive the PDSCH, the UE sends a non-acknowledgment message NACK to the base station.

68. The method according to any one of claims 56 to 67, further comprising: the UE monitors the control channel and/or the search space configured by the base station and/or the first time configured by the base station. PDSCH.

69. The method according to claim 68, wherein when the UE monitors the control channel and the PDSCH at different times, the time interval of the first time of monitoring the control channel is greater than or less than the monitoring time. The first time interval of PDSCH.

70. The method according to claim 69, characterized in that, when the UE monitors the control channel and the PDSCH in the search space configured by the base station and/or the time configured by the base station configuration, the control channel is distinguished by the size of the transport block TBS and PDSCH, or the control channel and the PDSCH are distinguished according to at least one of resource granularity, time domain position, and frequency domain position, or the control channel and the PDSCH are distinguished according to preset first indication information.

71. The method according to claim 70, wherein the distinguishing the control channel and the PDSCH according to the preset first indication information includes:

The DCI and the PDSCH are distinguished according to the scrambling code of the cyclic redundancy check CRC or the control channel and the PDSCH are distinguished according to the newly added indication bit in the DCI or the first indication information in the original bit.

72. The method according to any one of claims 56 to 71, characterized in that the TBS is a subset of TBS specified by the Long Term Evolution LTE protocol.

73. The method according to any one of claims 56 to 72, further comprising: the UE determines that the PDSCH is in monitoring mode according to preset rules, or,

The UE receives the sixth signaling sent by the base station, and determines that the PDSCH is in the listening mode according to the indication information in the sixth signaling. The sixth signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

74. A data transmission method, characterized by including:

The user equipment UE determines the range of frequency resources indicated by the downlink control information DCI; the UE determines the frequency resources used for data transmission according to the indication information in the DCI; the UE determines the frequency resources used for data transmission in the frequency resources used for data transmission. transfer data on.

75. The method according to claim 74, wherein the UE determines the range of frequency resources used for DCI indication, including:

The UE adopts the preset first frequency resource as the range of frequency resources used for DCI indication; or,

The UE receives the seventh signaling sent by the base station, and determines the range of frequency resources used for DCI indication according to the indication information in the seventh signaling, where the seventh signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or medium access control MAC control element CE signaling.

76. The method according to claim 74 or 75, characterized in that, before the UE transmits data on the frequency resource used for data transmission, it further includes:

The UE receives the second DCI sent by the base station, and the DCI indicates the coding rate of the data.

77. The method of claim 76, wherein the encoding rate includes an aggregation level of resource granularity of the data; or,

The coding rate includes the number of PRBs of the first data that defines the modulation method and the TBS corresponding to the first data. The modulation method is defined by preset or signaling configuration.

78. The method according to any one of claims 74 to 77, characterized in that, before the UE transmits data on the frequency resource used for data transmission, it further includes:

The UE determines that the transmission block size TBS of the data is the preset TBS, or, the

The UE receives the eighth signaling sent by the base station and determines the TBS according to the indication information in the eighth signaling. The eighth signaling includes at least one of the following: RRC signaling, PDDCH, EPDCCH or MAC. CE signaling.

79. The method according to any one of claims 74 to 77, characterized in that, before the UE transmits data on the frequency resource used for data transmission, it further includes:

The UE receives the third DCI sent by the base station, and determines the TBS under a specific modulation method according to the indication information in the DCI. The specific modulation method is determined through preset or signaling configuration.

80. The method according to any one of claims 74 to 78, characterized in that:

81. The method according to any one of claims 74 to 80, further comprising: the UE receiving the second subframe configured by the base station, and the UE monitoring the public in the second subframe. control channel.

82. The method according to claim 81, wherein the period of the second subframe is an integer multiple of the discontinuous reception period DRX.

83. A data transmission method, characterized by including:

The base station determines the transport block size TBS to be sent;

The base station determines the time domain resources and frequency resources for transmitting the physical downlink shared channel PDSCH, and the PDSCH is used to transmit the transport block;

The base station sends the transmission block to the user equipment UE on the time domain resource and frequency resource.

84. The method according to claim 83, characterized in that the base station determines the transmission block size TBS, including:

The base station determines that the size of the transport block is a preset TBS; or,

The base station sends first signaling to the UE. The first signaling includes indication information for determining the transport block size TBS. The first signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or medium access control MAC control element CE signaling.

85. The method according to claim 83, further comprising:

The base station determines a coding rate for transmitting the PDSCH;

The base station sends the transmission block to the user equipment UE on the time domain resource and frequency resource, including:

The base station sends the transmission block to the user equipment UE according to the coding rate on the time domain resource and frequency resource.

86. The method according to claim 85, wherein said transmitting the coding rate of PDSCH includes: transmitting an aggregation level of resource granularity of PDSCH;

The base station determines the coding rate for transmitting PDSCH, including:

The base station determines that the aggregation level of resource granularity for transmitting PDSCH is a preset aggregation level; or, the base station sends an aggregation level configuration message to the UE, so that the UE determines the resource for transmitting PDSCH according to the configuration message. Aggregation level of granularity;

87. The method according to claim 86, characterized in that the aggregation level includes the following Any resource granularity or a multiple of any of the following resource granularities: CCE, ECCE, REG, EREG, PRB, VRB.

88. The method according to claims 83 to 87, characterized in that the base station determines the frequency resource for transmitting PDSCH, including:

The base station determines that the resource block RB for transmitting PDSCH is a preset resource block RB; or, the base station sends second signaling to the UE, and the second signaling includes the resource block RB used to determine the PDSCH. Indication information, the second signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

89. The method according to any one of claims 83 to 87, characterized in that the base station determines the frequency resources of PDSCH, including:

The base station determines that the bandwidth for transmitting PDSCH is the preset bandwidth;

The base station sends third signaling to the UE, where the third signaling includes indication information for determining the first starting position of the frequency resource of the PDSCH, where the third signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

90. The method according to claim 88 or 89, characterized in that the base station determines the frequency resource for transmitting PDSCH, and further includes:

The base station sends fourth signaling to the UE, where the fourth signaling includes indication information for the UE to determine a second starting position for monitoring the frequency resource of the PDSCH, where the fourth signaling is At least one of the following: _RRC signaling, PDCCH, EPDCCH or MAC CE signaling.

91. The method according to claim 83, characterized in that the base station determines the time domain resources for transmitting PDSCH, including:

The base station determines that the time domain resource for transmitting PDSCH is the preset first subframe; or, the fifth signaling sent by the base station to the UE, the fifth signaling includes determining the first subframe for transmitting PDSCH. Frame indication information.

92. The method according to claim 91, wherein the indication information in the fifth signaling also includes a discontinuous reception cycle, a starting subframe of discontinuous reception, and an activity time, and the activity time includes detection activity The time corresponding to the timer and/or the time corresponding to the inactive timer.

93. The method according to claim 92, wherein the first subframe used to transmit the PDSCH is a subframe within the active time.

94. The method according to any one of claims 83 to 93, characterized in that, on the basis After the station sends the transport block to the UE on the time domain resource and the frequency resource according to the coding rate, it also includes:

The base station receives the confirmation message ACK or the non-confirmation message NACK sent by the UE.

95. The method according to claim 94, characterized in that, when the base station does not receive the acknowledgment message ACK sent by the UE within the first preset time, the base station restarts within the second preset time. Send the transport block.

96. The method according to any one of claims 83 to 95, further comprising: the base station sending control to the UE in a preset search space and/or within a preset first time channel and\or PDSCH.

97. The method according to claim 96, wherein when the base station sends the control channel and the PDSCH in different first times, the time interval of the first time for sending the control channel is greater than or equal to The time interval is less than the first time the PDS CH is sent.

98. The method according to claim 96 or 97, characterized in that when the base station sends the control channel and PDSCH to the UE in a preset search space and/or a preset first time, the The control channel or the PDSCH also includes preset first indication information, which is used to enable the UE to distinguish the control channel and the PDSCH.

99. The method according to any one of claims 83 to 98, wherein the TBS is a subset of TBS specified by the Long Term Evolution LTE protocol.

100. The method according to any one of claims 83 to 99, further comprising: the base station determining that the PDSCH is in monitoring mode according to preset rules, or,

The base station sends sixth signaling to the UE. The sixth signaling includes indication information for determining that the PDSCH is in the listening mode. The sixth signaling is at least one of the following: RC signaling, PDCCH , EPDCCH or MAC CE signaling.

101. The method according to any one of claims 83 to 100, characterized in that the base station uses the frequency resource for data transmission to perform data transmission, including. - When the base station uses a non-MBSFN subframe When transmitting the physical downlink shared channel PDSCH, the base station uses antenna port 0 or transmits diversity to transmit the PDSCH;

When the base station uses the MBSFN subframe to transmit the PDSCH, the base station uses antenna port port 7 to transmit the PDSCH.

102, a data transmission method, characterized by including: correction page (Article 91 of the Rules) The base station determines the range of frequency resources indicated by the downlink control information DCI; the base station sends the DCI to the user equipment UE, so that the UE determines the frequency resources used for data transmission according to the indication information in the DCI;

The base station uses the frequency resources used for data transmission to perform data transmission.

103. The method according to claim 102, characterized in that, the base station determines for

The range of frequency resources indicated by DCI includes:

The base station uses the preset first frequency resource as the range of frequency resources used for DCI indication; or,

The base station sends seventh signaling to the UE, where the seventh signaling includes indication information for determining the range of frequency resources used for DCI indication, and the seventh signaling is at least one of the following: RRC signaling, PDCCH, EPDCCH or medium access control MAC control element CE signaling.

104. The method according to claim 102 or 103, further comprising: the base station sending a second DCI to the UE, the second DCI including an indication indicating the coding rate of the data. information.

105. The method of claim 104, wherein the coding rate of the second DCI indication includes an aggregation level of the DCI indication; or,

106. The method according to any one of claims 102 to 105, further comprising: the base station determining the transmission block size TBS of the transmission data to be a preset TBS, or, the base station transmitting the data to the base station. The UE sends eighth signaling, where the eighth signaling includes indication information for determining the TBS, and the eighth signaling includes at least one of the following: RRC signaling, MAC CE signaling, or DCI.

107. The method according to any one of claims 102 to 105, further comprising: the base station determining the TBS in a specific modulation mode of the transmission data, wherein the specific modulation mode is determined by preset or Signaling configuration determined;

The base station sends a third DCI to the UE, where the third DCI includes indication information for determining the TBS under a specific modulation mode.

108. The method according to any one of claims 102 to 106, characterized in that: when the system bandwidth is {1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz} When it is one of {6RB, 15RB, 30RB, 50RB, 75RB, 100RB}, the frequency range used for DCI indication is smaller than the system bandwidth;

109. The method according to any one of claims 102 to 108, further comprising: the base station sending a configuration message containing a second subframe to the UE, used to instruct the UE to The second subframe monitors the common control channel.

110. The method according to claim 109, wherein the period of the second subframe is an integer multiple of the discontinuous reception period DRX.