WO2018095193A1

WO2018095193A1 - Information transmission method, base station, system, and computer storage medium

Info

Publication number: WO2018095193A1
Application number: PCT/CN2017/107791
Authority: WO
Inventors: 孙军帅; 王莹莹; 黄学艳
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团公司
Priority date: 2016-11-22
Filing date: 2017-10-26
Publication date: 2018-05-31
Also published as: CN108093438B; CN108093438A

Abstract

The invention discloses an information transmission method, base station, system, and computer storage medium. The information transmission method comprises: adding, into a physical downlink control channel (PDCCH), resource information comprising location information of at least one downlink time-domain resource for at least one user equipment; and employing a time-domain multiplexing scrambling code to perform scrambling on the PDCCH, and broadcasting to the at least one user equipment the scrambled PDCCH.

Description

Information transmission method, base station, system and computer storage medium

Cross-reference to related applications

The present application is filed on the basis of the Chinese Patent Application No. PCT Application No. No. No. No. No. No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No

Technical field

The present invention relates to signaling management technologies in the field of communications, and in particular, to an information transmission method, a base station, a system, and a computer storage medium.

Background technique

With the promotion of mobile Internet, various Internet services need to connect terminals and Internet servers through wireless mobile networks. Especially after B4G and even 5G broadband wireless mobile networks are popularized, wireless mobile networks will certainly support more Internet services. Various Internet applications such as QQ service, WeChat service, web browsing service, various microblog interaction services, network instant chat service, website login processing, etc., the common feature is that data transmission is discontinuous (time interval is calculated in seconds, and LTE Compared with the 1ms air interface transmission time interval, the service rate is low, and the burst data packet may be large or small, but once data is sent, it must be sent out in time to avoid affecting the user's experience perception. .

When the downlink burst non-continuous low-rate service data is sent, the amount of data per user is very small, and the number of PRBs to be allocated is small. As a result, excessive fragmentation in the system bandwidth reduces resource utilization and increases the complexity of resource allocation. Degrees may increase the probability of collision of control channels and increase resource fragmentation.

Summary of the invention

In view of the above, an object of the present invention is to provide an information transmission method, a base station, a system, and a computer storage medium, which can solve at least the above problems in the prior art.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

An embodiment of the present invention provides an information transmission method, including:

The resource information is added to the physical downlink control channel PDCCH, where the resource information includes at least location information of at least one downlink time domain resource for the at least one user equipment;

The PDCCH is scrambled by using a time domain multiplexing scrambling code, and the scrambled PDCCH is broadcast to at least one user equipment.

An embodiment of the present invention provides a base station, where the base station includes:

An information generating unit, configured to add the resource information to the physical downlink control channel PDCCH, where the resource information includes at least location information of at least one downlink time domain resource for the at least one user equipment;

And a communication unit, configured to scramble the PDCCH by using a time domain multiplexing scrambling code, and broadcast the scrambled PDCCH to the at least one user equipment.

The processor adds the resource information to the physical downlink control channel PDCCH, where the resource information includes at least location information of at least one downlink time domain resource for the at least one user equipment, and uses the time domain multiplexing scrambling code to the PDCCH. Perform scrambling;

The communication interface broadcasts the scrambled PDCCH to the at least one user equipment.

An embodiment of the present invention provides an information transmission system, where the system includes: a base station and at least one user equipment;

a base station, configured to add resource information to the physical downlink control channel PDCCH, where the resource information includes at least location information of at least one downlink time domain resource for the at least one user equipment; and using a time domain multiplexing scrambling code pair The PDCCH is scrambled to at least one user equipment Broadcast PDCCH after scrambling;

The user equipment is configured to determine location information of the corresponding downlink time domain resource based on the received PDCCH, and perform PDSCH reception based on the location information of the downlink time domain resource.

Embodiments of the present invention provide a communication apparatus, including: a processor and a memory for storing a computer program executable on a processor,

Wherein the processor is configured to perform the steps of the foregoing method when the computer program is run.

Embodiments of the present invention provide a computer storage medium storing computer executable instructions that implement the foregoing method steps when the computer executable instructions are executed.

The embodiment of the present invention provides an information transmission method, a base station, a system, and a computer storage medium, which are capable of allocating corresponding resource information to at least one user equipment through one PDCCH, so that the user equipment performs service data reception based on the received resource information. . In this way, resource fragments generated by respectively transmitting corresponding resource allocation information to multiple user equipments are avoided, and since resource allocation is uniformly performed, the probability of collision between control channels is reduced.

DRAWINGS

1 is a schematic flowchart of an information transmission method according to an embodiment of the present invention;

2 is a schematic diagram of a transmission cycle according to an embodiment of the present invention;

3 is a schematic diagram of ambiguity between sending downlink data and receiving feedback information according to an embodiment of the present invention;

4 is a schematic diagram of reallocating a next round of multiplexing cycle according to an embodiment of the present invention;

5 is a schematic structural diagram 1 of a base station structure according to an embodiment of the present invention;

6 is a schematic structural diagram of a system structure according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram 2 of a base station structure according to an embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Embodiment 1

An embodiment of the present invention provides an information transmission method, as shown in FIG. 1 , including:

Step 101: Add resource information to the physical downlink control channel PDCCH, where the resource information includes at least location information of at least one downlink time domain resource for the at least one user equipment;

Step 102: The PDCCH is scrambled by using a time domain multiplexing scrambling code, and the scrambled PDCCH is broadcast to at least one user equipment.

Here, the location information of the at least one downlink time domain resource may be a subframe position of the downlink shared channel where the at least one user equipment receives the downlink service data. For example, the subframe number can be specifically.

In addition, the resource information may specifically allocate resources in units of resource blocks RB, that is, the time domain resources corresponding to the resource blocks also include location information of the corresponding frequency domain resources.

It should be further noted that the time domain multiplexing period is N times of a half system frame; wherein N is an integer.

For example, specifically, it can be 2N times of a half system frame, and the real-time domain multiplexing period T=2*N*HalfSFN, N∈{1,2,3,...,M}, the value of M should not be exceeded. Large, generally no more than 8 (related to the maximum number of retransmissions of HARQ, can be set by the maximum retransmission of a packet 4 times). HalfSFN is a half system frame and its length can be 5ms.

The broadcasting the scrambled PDCCH to the at least one user equipment further includes:

The control format in the preset subframe of the time domain multiplexing period indicates that the scrambled PDCCH is broadcast to the at least one user equipment in the CFI area.

The preset subframe of the time domain multiplexing period is:

The first subframe in the time domain multiplexing period is used as the preset subframe;

Or, one subframe before the first subframe of the time domain multiplexing period is used as the preset subframe.

That is, the PDCCH is within the CFI (Control Format Indicator) region of the first subframe starting in the time domain multiplexing period T. The dedicated C-RNTI scrambling is used, which is named TFM-RNTI (Time Field Multiplexing RNTI). TFM-RNTI: Decodes the PDCCH for the time domain multiplexing dedicated RNTI, and takes any data that is idle between 0 and 65535.

Further, the CCE level of the physical resource occupied by the PDCCH is one of 1/2/4/8.

The format used for transmitting the resource information in the PDCCH may be similar to the DCI1A in the Downlink Control Information (DCI) format, where the DCI 1A may include: a scheduling compression mode for the PDSCH, and a PDSCH. Fields such as RB allocation and starting position, MCS, HARQ process number, and power control information for PUCCH; specifically, HARQ process number – 3 bits (FDD), 4 bits in DCI 1A are required. (TDD); New data indicator–1 bit, Redundancy version–2 bits, TPC command for PUCCH–2 bits field are to be removed or all set to 0.

It should be noted that, besides some of the above fields are set to be empty or set to 0, it is necessary to add a resource location (such as the location of the PRB), the start and end of the time domain multiplexing period, in the PDCCH.

After the foregoing PDCCH is transmitted, the base station starts to send a PDSCH, that is, a physical downlink shared channel, to each user equipment, and sends downlink service information for each user equipment by using physical downlink shared information. Specifically, determining, according to the location information of the downlink time domain resource of the at least one user equipment, the subframe position of the physical downlink shared channel corresponding to each user equipment, and correspondingly speaking through the physical downlink shared channel User setting Prepare to send business data.

When the PDSCH sends the service data, the C-RNTI corresponding to the user equipment is used for scrambling, and the user equipment determines whether the data is sent to itself according to the correctness after the descrambling.

PDSCH resources: Plan the appropriate number of PRBs according to the specific service type, and adjust the number of PRBs according to the detected data volume changes.

After the foregoing service information is sent, it is determined whether the HARQ retransmission is performed. Specifically, the retransmission process identifier is determined based on the subframe position of the physical downlink shared channel corresponding to the user equipment; when it is determined that the user equipment needs to be performed. When retransmitting, determining, according to the retransmission process identifier, retransmitting a subframe position of the physical downlink shared channel.

Because there is no PDCCH indicating the HARQ process and the retransmission information in each TTI, the synchronous HARQ mode is adopted, and the process ID of the HARQ is the air interface subframe number of the data received by the user in HalfSFN (value 0 to 4) or SFN (value) The index of 0 to 9); if retransmitted, it is retransmitted at the same subframe index of the HalfSFN or SFN included in the time domain period T. The RV version is determined by signaling and then used sequentially according to the number of retransmissions.

The selection of the Half SFN and the SFN mode needs to be determined according to the uplink and downlink subframe ratio and the delay of the air interface data transmission, as long as all the subframe number indexes do not appear ambiguous.

Among them, the choice of HalfSFN and SFN modes is as follows: Cfg2: 1UL: 3DL, because there are many DLs, the halfSFN mode can be selected. Cfg0: 3UL: 1DL, because DL is relatively small, you can choose SFN mode.

As shown in FIG. 3, the uplink feedback delay of subframe 1 (A) exceeds subframe 1 (B), resulting in ambiguity of the feedback.

Further, the method further includes: the base station sending control information to the user equipment, and controlling, by the control information, the user equipment to feed back a timing advance (TA). The current synchronization mechanism requires a random access procedure and then sends a TA. The scheme provided in this embodiment periodically sends a TA to ensure that random access is not triggered, thereby further reducing the time taken for synchronization.

The processing flow of the information transmission method performed by the base station side may specifically include:

1. Establish a time domain multiplexed physical channel using the PDCCH broadcast of the TFM-RNTI. In the time domain period T, the allocated PRB is fixedly used in each TTI.

2. The data of each user is sequentially transmitted in the time domain period T, and the index of the subframe number in the HalfSFN or the SFN when the data is transmitted is used as the HARQ process identifier of the data, and is ready for retransmission.

3. If the base station transmits all the users' data in the time domain period T and does not retransmit, then the next round of the time domain period and the resource dynamic exchange are initiated, or determined according to the data transmission situation. For the change of the time domain multiplexing period, refer to FIG. 4. It can be seen from FIG. 4 that the next round of the time domain period is shown by the dotted line, and the next round of the time domain period and the starting position of the current time domain period may be different. The length can also be different.

4. In the time domain period T, the base station can send the Time Advance Command MAC Control Element control frame to the user, and report the uplink synchronization and time alignment through the terminal reporting TA Command.

It can be seen that, by adopting the foregoing solution, corresponding resource information can be allocated to at least one user equipment by using one PDCCH, so that the user equipment performs service data reception based on the received resource information. In this way, resource fragments generated by respectively transmitting corresponding resource allocation information to multiple user equipments are avoided, and since resource allocation is uniformly performed, the probability of collision between control channels is reduced.

Embodiment 2

An embodiment of the present invention provides a base station, as shown in FIG. 5, including:

The information generating unit 51 is configured to add the resource information to the physical downlink control channel PDCCH, where the resource information includes at least location information of at least one downlink time domain resource for the at least one user equipment;

The communication unit 52 is configured to scramble the PDCCH by using a time domain multiplexing scrambling code, to at least one The user equipment broadcasts the scrambled PDCCH.

The communication unit 52 is configured to broadcast the scrambled PDCCH to the at least one user equipment in the control format indication CFI area in the preset subframe of the time domain multiplexing period.

The preset subframe of the time domain multiplexing period is:

It should be noted that, besides some of the above fields are set to be empty or set to 0, it is necessary to add a resource location (for example, a location of an RB), a start and a termination location of a time domain multiplexing period in the PDCCH.

After the foregoing PDCCH is transmitted, the base station starts to send a PDSCH, that is, a physical downlink shared channel, to each user equipment, and sends downlink service information for each user equipment by using physical downlink shared information. Specifically, the communication unit 52 is configured to determine, according to the location information of the downlink time domain resource of the at least one user equipment, the subframe position of the physical downlink shared channel corresponding to each user equipment, and pass the physical The service data is sent to the corresponding user equipment in the downlink shared channel.

On the basis of the foregoing service information, it is required to determine whether to perform the HARQ retransmission. Specifically, the base station further includes:

The retransmission unit 53 is configured to determine, according to a subframe position of the physical downlink shared channel corresponding to the user equipment, a retransmission process identifier, and when determining that the user equipment needs to perform retransmission, determining, according to the retransmission process identifier, retransmission The subframe position of the physical downlink shared channel.

Further, the communication unit is configured to send control information to the user equipment, and control, by the control information, the user equipment to feed back a timing advance (TA). The current synchronization mechanism requires a random access procedure and then sends a TA. The scheme provided in this embodiment periodically sends a TA to ensure that random access is not triggered, thereby further reducing the time taken for synchronization.

Embodiment 3

An embodiment of the present invention provides an information transmission system. As shown in FIG. 6, the system includes: a base station 61 and at least one user equipment 62;

The base station 61 is configured to add the resource information to the physical downlink control channel PDCCH, where the resource information includes at least location information of at least one downlink time domain resource for the at least one user equipment, and the time domain multiplexing scrambling code The PDCCH is scrambled, and the scrambled PDCCH is broadcast to at least one user equipment;

The user equipment 62 is configured to determine location information of the corresponding downlink time domain resource based on the received PDCCH, and perform PDSCH reception based on the location information of the downlink time domain resource.

The preset subframe of the time domain multiplexing period is:

After the foregoing PDCCH is transmitted, the base station starts to send a PDSCH, that is, a physical downlink shared channel, to each user equipment, and sends downlink service information for each user equipment by using physical downlink shared information. Specifically, determining, according to the location information of the downlink time domain resource of the at least one user equipment, the subframe position of the physical downlink shared channel corresponding to each user equipment, and correspondingly speaking through the physical downlink shared channel User equipment sends business data.

As shown in FIG. 7, the user equipment includes:

The information receiving unit 71 is configured to receive control information that is sent by the base station, where the control information includes at least time advance amount uploading control information;

The information sending unit 72 is configured to report time advance to the base station based on the control information. the amount.

Embodiment 4

An embodiment of the present invention provides a base station, as shown in FIG. 8, including:

The processor 81 adds the resource information to the physical downlink control channel PDCCH, where the resource information includes at least location information of at least one downlink time domain resource for the at least one user equipment, and uses the time domain multiplexing scrambling code pair. The PDCCH is scrambled;

The communication interface 82 broadcasts the scrambled PDCCH to the at least one user equipment.

The communication interface broadcasts the scrambled PDCCH to the at least one user equipment in the control format indication CFI area in the preset subframe of the time domain multiplexing period.

The preset subframe of the time domain multiplexing period is:

After the foregoing PDCCH is transmitted, the base station starts to send a PDSCH to each user equipment, that is, a physical downlink shared channel, and sends out a physical downlink shared information for each Downstream service information of user equipments. Specifically, the processor determines, according to the location information of the downlink time domain resource of the at least one user equipment, the subframe position of the physical downlink shared channel corresponding to each user equipment;

The communication interface sends service data to the corresponding user equipment in the physical downlink shared channel.

On the basis of the foregoing service information, it is required to determine whether to perform the HARQ retransmission. Specifically, the processor determines the retransmission process identifier based on the subframe position of the physical downlink shared channel corresponding to the user equipment; When the user equipment needs to perform retransmission, it is determined that the subframe position of the physical downlink shared channel is retransmitted based on the retransmission process identifier.

A base station in an embodiment of the present invention includes: a processor and a memory for storing a computer program executable on the processor,

The method steps of the foregoing Embodiment 1 are performed when the processor is used to run the computer program, and details are not described herein.

The embodiment of the present invention provides a computer storage medium, where the computer storage medium stores computer executable instructions, and when the computer executable instructions are executed, the method steps of the foregoing first embodiment are implemented.

The integrated modules described in the embodiments of the present invention may also be stored in a computer readable storage medium if they are implemented in the form of software functional modules and sold or used as separate products. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions. A computer device (which may be a personal computer, a network device, or a network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), and a random access memory (RAM, Random). A variety of media that can store program code, such as Access Memory, disk, or optical disk. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

An information transmission method is applied to a base station, where the method includes:

The resource information is added to the physical downlink control channel PDCCH, where the resource information includes at least location information of at least one downlink time domain resource for the at least one user equipment;

The PDCCH is scrambled by using a time domain multiplexing scrambling code, and the scrambled PDCCH is broadcast to at least one user equipment.
The method according to claim 1, wherein the broadcasting the scrambled PDCCH to the at least one user equipment further comprises:

The control format in the preset subframe of the time domain multiplexing period indicates that the scrambled PDCCH is broadcast to the at least one user equipment in the CFI area.
The method according to claim 2, wherein the preset subframe of the time domain multiplexing period is:

The first subframe in the time domain multiplexing period is used as the preset subframe;

Or, one subframe before the first subframe of the time domain multiplexing period is used as the preset subframe.
The method according to claim 2 or 3, wherein the time domain multiplexing period is N times a half system frame; wherein N is an integer.
The method of claim 1 further comprising:

Determining, according to the location information of the downlink time domain resource of the at least one user equipment, the subframe position of the physical downlink shared channel corresponding to each user equipment, and using the physical downlink shared channel to the corresponding user equipment Send business data.
The method of claim 5, wherein the method further comprises:

Determining a retransmission process identifier based on a subframe position of the physical downlink shared channel corresponding to the user equipment;

When it is determined that the user equipment needs to perform retransmission, determining, according to the retransmission process identifier, retransmitting a subframe position of the physical downlink shared channel.
A base station, the base station includes:

An information generating unit, configured to add the resource information to the physical downlink control channel PDCCH, where the resource information includes at least location information of at least one downlink time domain resource for the at least one user equipment;

And a communication unit, configured to scramble the PDCCH by using a time domain multiplexing scrambling code, and broadcast the scrambled PDCCH to the at least one user equipment.
The base station according to claim 7, wherein the communication unit is configured to broadcast the scrambled to the at least one user equipment in a control format indication CFI area in a preset subframe of the time domain multiplexing period. PDCCH;

The preset subframe of the time domain multiplexing period is:

The first subframe in the time domain multiplexing period is used as the preset subframe;

Or, one subframe before the first subframe of the time domain multiplexing period is used as the preset subframe.
The base station according to claim 8, wherein the time domain multiplexing period is N times a half system frame; wherein N is an integer.
The base station according to claim 7, wherein the communication unit is configured to determine, according to the location information of the downlink time domain resource of the at least one user equipment, the physical downlink sharing corresponding to each user equipment. The subframe position of the channel, and the service data is sent to the corresponding user equipment in the physical downlink shared channel.
The base station according to claim 10, wherein the base station further comprises:

a retransmission unit, configured to determine, according to a subframe position of the physical downlink shared channel corresponding to the user equipment, a retransmission process identifier; when determining that the user equipment needs to perform retransmission, determining, according to the retransmission process identifier, retransmission of the physical The subframe position of the downlink shared channel.
A base station, the base station includes:

The processor adds the resource information to the physical downlink control channel PDCCH, where the resource information includes at least one downlink time domain resource for the at least one user equipment. Location information; scrambling the PDCCH by using a time domain multiplexing scrambling code;

The communication interface broadcasts the scrambled PDCCH to the at least one user equipment.
The base station according to claim 12, wherein the communication interface broadcasts the scrambled PDCCH to at least one user equipment in a control format indication CFI area in a preset subframe of the time domain multiplexing period;

The preset subframe of the time domain multiplexing period is:

The first subframe in the time domain multiplexing period is used as the preset subframe;

Or, one subframe before the first subframe of the time domain multiplexing period is used as the preset subframe.
The base station according to claim 13, wherein said time domain multiplexing period is N times a half of a system frame; wherein N is an integer.
The base station according to claim 12, wherein the processor determines, according to the location information of the downlink time domain resource of the at least one user equipment, the physical downlink shared channel corresponding to each user equipment. Subframe position;

The communication interface sends service data to the corresponding user equipment in the physical downlink shared channel.
The base station according to claim 15, wherein the processor determines a retransmission process identifier based on a subframe position of a physical downlink shared channel corresponding to the user equipment; and when determining that the user equipment needs to perform retransmission, based on The retransmission process identifier determines a subframe position for retransmitting the physical downlink shared channel.
An information transmission system, comprising: a base station and at least one user equipment; wherein

a base station, configured to add resource information to the physical downlink control channel PDCCH, where the resource information includes at least location information of at least one downlink time domain resource for the at least one user equipment; and using a time domain multiplexing scrambling code pair The PDCCH is scrambled, and the scrambled PDCCH is broadcast to at least one user equipment;

The user equipment is configured to determine location information of the corresponding downlink time domain resource based on the received PDCCH, and perform PDSCH reception based on the location information of the downlink time domain resource.
The system of claim 17, wherein the user equipment comprises:

An information receiving unit, configured to receive control information delivered by the base station, where the control information includes at least time advance amount uploading control information;

And an information sending unit, configured to report a timing advance to the base station based on the control information.
A base station includes: a processor and a memory for storing a computer program executable on the processor,

Wherein the processor is operative to perform the steps of the method of any of claims 1-6 when the computer program is run.
A computer storage medium storing computer executable instructions that, when executed, implement the method steps of any of claims 1-6.