CN102378129A - Method for transmitting and receiving system message, device and equipment thereof - Google Patents

Abstract

The invention discloses a system message sending and receiving method, device and equipment, which are used to reduce the common search space resource occupied when sending the system message, and reduce the energy consumption when receiving the system message. The method for sending a system message includes: generating a system message block 1 on a system carrier, the system message block 1 including scheduling information of other system message blocks 2 to N, and the scheduling information indicating each other system message block Corresponding time-frequency position: carry the generated system information block 1 on the system carrier and send it.

Description

System message sending and receiving method, device and equipment

technical field

The present invention relates to the field of wireless communication, in particular to a method, device and equipment for sending and receiving system messages.

Background technique

MTC (Machine-Type Communication) refers to the communication between machines (devices and devices), also known as M2M communication. As shown in Figure 1, MTC application scenarios include MTC terminals, Operator domain (operating domain ) and the MTC server is a communication scenario that does not require human participation. At present, 3GPP (3rd Generation Partnership Project, the third-generation mobile communication standardization organization) has begun to discuss related study items (learning items), and is studying whether it is necessary to optimize the network for MTC, especially in the future when a large number of MTC terminals are applied to In the actual network, whether it will affect the communication between people, the communication between people is also called H2H (Human to Human) communication. Considering the broad application prospects of MTC in the future, how to optimize the network based on H2H communication for different application scenarios is one of the important directions of MTC research.

The current core network specification 3GPP 22.368 defines 16 important characteristics of MTC, including low mobility, time control type, delay tolerance type, online small data transmission type, etc. For different application scenarios, including meter reading applications, remote control, etc., it may have one of the features or a combination of several features at the same time.

MTC terminals access small-bandwidth dedicated carriers to carry small-data-type MTC services. On the one hand, it can reduce the interaction between MTC services and H2H communication, and on the other hand, it can also improve system resource utilization. Therefore, designing a dedicated carrier for MTC is an important research direction, and the sending and receiving of system messages on the dedicated carrier is the first step of research.

Next, taking the LTE (Long Term Evolution, long-term evolution plan) system as an example, the methods for sending and receiving system messages in the prior art are introduced.

The LTE TDD system adopts the frame structure shown in Figure 2a: a 10ms wireless frame (Frame) consists of two 5ms half-frames, and each half-frame consists of eight 0.5ms service time slots (Time Slot, TS) and three The three special areas are: downlink pilot time slot (DwPTS), downlink-uplink guard interval (GP) and uplink pilot time slot (UpPTS). The length of the three special areas can be flexibly determined by high-level signaling configuration, but the total length remains unchanged at 1ms. Two consecutive business time slots form a sub-frame (Sub-Frame, SF), the length of each sub-frame is 1ms, each half-frame includes 4 sub-frames, and a radio frame includes 8 sub-frames, followed by sub-frames #0, subframe #1...subframe #7, subframe #0 is always allocated to transmit downlink services.

The LTE FDD system adopts the frame structure shown in Figure 2b: a 10ms wireless frame (Frame) consists of two 5ms half-frames, each half-frame consists of ten 0.5ms business time slots (Time Slot, TS), Two consecutive business time slots form a sub-frame (Sub-Frame, SF), the length of each sub-frame is 1ms, each half-frame includes 5 sub-frames, and a radio frame includes 10 sub-frames, followed by sub-frames #0, subframe #1...subframe #9.

The LTE system is based on Orthogonal Frequency Division Multiplex (OFDM) technology. Each subframe in the time domain is divided into several resource blocks according to the frequency. The minimum unit of resource scheduling in the LTE system is the resource block.

In the LTE system, system messages are divided into different message blocks according to different functions undertaken, including main system message, system message block 1, system message block 2... system message block 12. The method of sending system messages, including:

1. Sending of main system messages

The main system information is carried on the fixed resource block position of the 0th subframe of each radio frame of the system carrier, that is, the fixed time-frequency position of the main system information can be known by the terminal device in advance. The main system message includes carrier bandwidth information, system frame number and PHICH (Physical HARQ Indicator Identifier, physical HARQ indicator channel) configuration information.

2. Sending of system message block 1

The system information block 1 is carried on the No. 5 subframe of the even-numbered radio frame of the system carrier. The specific resource block location is unknown to the terminal equipment and needs to be obtained through blind detection; in the public search space of this subframe, it is necessary to place PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) of RNTI (System Information-Radio Network Temporary Identifier, System Information-Radio Network Temporary Identifier, System Information-Radio Network Temporary Identifier) is used to indicate the resource block position occupied by system information block 1. The system information block 1 includes whether to allow user access, the relevant identification of the system, the scheduling information of other system information blocks (system information blocks 2-12), and the length of the scheduling window. The scheduling information of other system information blocks (system information blocks 2-12) is provided by the base station scheduler, including the possible starting positions and ending positions of system information blocks 2-12 (through the start frame and end frame, and the subframe indicated by the number).

3. Sending of other system message blocks (system message blocks 2 to 12)

According to the scheduling information of other system information blocks (system information blocks 2 to 12) provided by the base station equipment, the base station equipment, in a certain section between the possible start position and end position corresponding to the system information block of a certain identification number Place the system message block on the resource block. The system message block can be placed multiple times on different resource blocks between the start position and the end position. And in the common search space of the subframe where the system information block is placed, a PDCCH including SI-RNTI is placed to indicate the position of the resource block occupied by the system information block.

The method of receiving system messages, including:

1. Receive the main system message

The terminal device first receives the main system message, and the terminal device only needs to receive the main system message at a fixed time-frequency position known in advance (the fixed resource block position of the 0th subframe of each radio frame).

2. Reception of system message block 1

After receiving the main system message, the terminal device knows the system frame number and the subframe number, and receives the system message block 1 on the fifth subframe of the even radio frame. However, since the terminal device does not know the resource block position of the system information block 1 in the fifth subframe of the even radio frame, blind detection is required. Blind detection means that the terminal device searches for the PDCCH including SI-RNTI in the common search space of the subframe of the system carrier. After searching for the PDCCH, it can know the position of the system information block 1 in the current subframe by analyzing the position of the resource block carried by it. The specific time-frequency position of the system information block 1 is known by the position of the resource block located above. After knowing the specific time-frequency position of the system information block 1, the terminal device can receive the system information block 1.

3. Reception of other system message blocks (system message blocks 2 to 12)

After receiving the system information block 1, the terminal device obtains the possible starting positions and ending positions of the system information blocks 2-12. If the terminal device needs to know the nth (n is an integer between 2 and 12) system information blocks, it needs to perform blind detection in the common search space of all subframes between its specified start position and end position, and search The PDCCH including SI-RNTI, once the PDCCH is searched, the resource block position of the system information block n in the current subframe can be known by analyzing the resource block position carried by it, and the specific time of the system information block n can be known. frequency position. After knowing the specific time-frequency position of the system information block n, the terminal device can receive the system information block n.

The method for sending and receiving system messages provided in the prior art requires base station equipment to send PDCCH including SI-RNTI in the common search space of the system carrier for sending system message blocks 1 to 12, thereby occupying the common search space of the system carrier. Search space resources: For receiving system message blocks 1-12, the terminal device needs to perform blind detection in the public search space of a certain range of subframes, which consumes the energy of the terminal device. For a system with large bandwidth and supporting H2H communication, the public search space is large, and the requirements for energy consumption of terminal equipment are not strict, so the above shortcomings can be tolerated. However, for a system with a small bandwidth and supporting MTC, the above disadvantages are particularly prominent due to the narrow public search space and strict requirements on energy consumption of terminal equipment.

Contents of the invention

Embodiments of the present invention provide a method, device and device for sending and receiving system messages, which are used to reduce common search space resources occupied when sending system messages, and reduce energy consumption when receiving system messages.

An embodiment of the present invention provides a method for sending a system message, including:

Generate a system information block 1 on the system carrier, the system information block 1 includes scheduling information of other system information blocks 2 to N, and the scheduling information indicates the time-frequency position corresponding to each other system information block;

The generated system information block 1 is carried on the system carrier and sent.

An embodiment of the present invention provides a method for receiving a system message, including:

Receive system message block 1 on the system carrier according to the system frame number extracted from the received main system message and the subframe number determined according to the fixed time-frequency position of the main system message;

The scheduling information of other system information blocks 2 to N is extracted from the received system information block 1, and the scheduling information indicates the corresponding time-frequency position of each other system information block.

An embodiment of the present invention provides a system message sending device, including:

A system information block 1 generation unit, configured to generate a system information block 1 on a system carrier, the system information block 1 includes scheduling information of other system information blocks 2 to N, and the scheduling information indicates that each other system information block is related to corresponding time-frequency position;

The system information block 1 sending unit is configured to carry the generated system information block 1 on the system carrier and send it.

An embodiment of the present invention provides a base station device, including the above apparatus for sending a system message.

An embodiment of the present invention provides a device for receiving system messages, including:

The system information block 1 receiving unit is configured to receive the system information block on the system carrier according to the system frame number extracted from the received main system message and the subframe number determined according to the fixed time-frequency position of the main system message 1;

The extracting unit is configured to extract the scheduling information of other system information blocks 2 to N from the received system information block 1, and the scheduling information indicates the corresponding time-frequency position of each other system information block.

An embodiment of the present invention provides a terminal device, including the above apparatus for receiving a system message.

The method, device and device for sending and receiving system messages provided by the embodiments of the present invention carry scheduling information of other system message blocks (system message blocks 2 to N) in system message block 1 when sending system messages, and the scheduling information Indicate the time-frequency position corresponding to each other system information block; when sending other system information blocks, carry other system information blocks on the time-frequency position indicated by the scheduling information and send; thus no need for common search in the corresponding subframe The PDCCH including the SI-RNTI is placed in the space to indicate the position of the resource block occupied by other system information blocks, so there is no need to occupy the common search space of the corresponding subframe, thereby reducing the common search space resources occupied when sending the system information. When receiving system information, it only needs to receive other corresponding system information blocks at the time-frequency position indicated by it according to the scheduling information of other system information blocks carried in system information block 1, without needing to be in the common search space of the corresponding subframe Blind detection is performed to reduce energy consumption when receiving system messages. The method, device and device for sending and receiving system messages provided by the embodiments of the present invention are especially suitable for communication systems with small bandwidth and limited public search space.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

FIG. 1 is a schematic diagram of an MTC application scenario in the prior art;

Fig. 2 a is a schematic diagram of a wireless frame structure of an LTE TDD system in the prior art;

Figure 2b is a schematic diagram of a wireless frame structure of an LTE FDD system in the prior art;

FIG. 3 is a flow chart for implementing a method for sending a system message in an embodiment of the present invention;

FIG. 4 is a flow chart for implementing a method for receiving a system message in an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a device for sending a system message in an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a device for receiving system messages in an embodiment of the present invention;

FIG. 7 is a flow chart for implementing a method for sending a main system message in a system supporting MTC in an embodiment of the present invention;

FIG. 8 is a flow chart of an implementation method for sending a system message block 1 in a system supporting MTC in an embodiment of the present invention;

FIG. 9 is a flow chart of an implementation method for sending other system message blocks 2 to N in a system supporting MTC in an embodiment of the present invention;

FIG. 10 is an implementation flow chart of a method for receiving a main system message in a system supporting MTC in an embodiment of the present invention;

FIG. 11 is a flow chart for implementing a method for receiving system message block 1 in a system supporting MTC in an embodiment of the present invention;

FIG. 12 is a flow chart of an implementation method for receiving other system message blocks 2 to N in a system supporting MTC in an embodiment of the present invention.

Detailed ways

In order to reduce the common search space resources occupied when sending system messages and reduce the energy consumption when receiving system messages, embodiments of the present invention provide a method, device and device for sending and receiving system messages, which is especially suitable for small bandwidth , Communication systems with limited public search space.

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention, and in the absence of conflict, the present invention The embodiments and the features in the embodiments can be combined with each other.

As shown in FIG. 3, an embodiment of the present invention provides a method for sending a system message, including the following steps:

S301. Generate a system information block 1 on the system carrier, the system information block 1 includes scheduling information of other system information blocks (system information blocks 2 to N), and the scheduling information indicates the time frequency corresponding to each other system information block Location;

In a specific implementation, the generated system message block 1 may include whether to allow user access, the relevant identification of the system, and scheduling information and scheduling window length of other system message blocks. In general, the scheduling information of other system information blocks is generated according to the indication information of the base station scheduler, and is used to indicate the time-frequency position corresponding to each other system information block, and the scheduling information indicates the system where other system information blocks will appear. The frame number and the subframe number, the position information of the resource block on the subframe, and the period in which the information block repeatedly appears (referred to as the repetition period). Specifically, a scheduling table of other system message blocks can be set in system message block 1. There is at least one scheduling entry in the scheduling table, and each scheduling entry includes a scheduling entry number, a system message block identification number corresponding to the scheduling entry, and a resource block indication Information and the cycle of system message blocks recurring. The scheduling entry number can be provided in an explicit or implicit way. The explicit way is to directly give the scheduling entry number, and the implicit way can be through the order in which the scheduling entries appear in the scheduling information. The dispatch entry number is implicitly given.

S302. Carry the generated system information block 1 on the system carrier and send it.

In a specific implementation, the generated system information block 1 can be carried on the fifth subframe of the radio frame whose system frame number is an even number of the system carrier; or, the generated system information block 1 can be carried on the system frame of the system carrier Send at the fixed resource block position of the 5th subframe of the radio frame with an even number.

In specific implementation, the sending method of the system message may also include:

Generate other system message blocks on the system carrier;

Each of the generated other system information blocks is respectively carried and sent at the time-frequency position corresponding to the other system information blocks indicated by the scheduling information.

In the specific implementation, other system information blocks on the system carrier are generated, and according to the instruction information provided by the base station scheduler, determine the system frame number and subframe number carrying other system information blocks, and the location where other system information blocks are placed on the subframe The resource block position, other system information blocks are placed in the fixed resource block position of the corresponding subframe for transmission.

In a specific implementation, the system carrier may be an MTC (Machine Type Communication) dedicated carrier. The main system message sent on the MTC dedicated carrier includes identification information indicating that the current system carrier is an MTC dedicated carrier, and the identification information can be set as a carrier that only the MTC terminal can identify by setting the carrier bandwidth information included in the main system message The bandwidth value is realized; and the main system message sent on the MTC dedicated carrier is sent on the fixed resource block position of the 0th subframe of each radio frame.

Correspondingly, as shown in FIG. 4, an embodiment of the present invention provides a method for receiving a system message, including the following steps:

S401. Receive system information block 1 on a system carrier according to the system frame number extracted from the received main system message and the subframe number determined according to the fixed time-frequency position of the main system message;

S402. Extract the scheduling information of other system information blocks 2 to N from the received system information block 1, where the scheduling information indicates the corresponding time-frequency position of each other system information block.

In a specific implementation, after receiving the main system message, the subframe number is determined according to the system frame number carried in the main system message and according to the fixed time-frequency position of the main system message.

Corresponding to the sending method of system message block 1:

If the terminal device does not know the location of the resource block where the system information block 1 is located, it searches for the PDCCH including the SI-RNTI in the common search space of the fifth subframe of the radio frame whose system frame number is an even number of the system carrier; once found The PDCCH, by analyzing the resource block position carried by it, can know the resource block position of the system information block 1 in the current subframe, and then know the specific time-frequency position of the system information block 1; after knowing the specific time-frequency position , the terminal device can receive system message block 1;

If the terminal device knows the resource block position where the system information block 1 is located, it can directly receive it at the resource block position corresponding to the No. 5 subframe of the radio frame whose system frame number of the system carrier is even, without blind detection.

After receiving system message block 1, the scheduling information of other system message blocks can be extracted from system message block 1. The scheduling information includes the system frame number and subframe number where other system message blocks will appear, and the The fixed resource block location information and the period of repetition of other system information blocks.

In specific implementation, the method for receiving the system message may also include:

According to the scheduling information of other system information blocks extracted from system information block 1, determine the time-frequency positions corresponding to other system information blocks to be received;

According to the system frame number extracted from the main system message and the subframe number determined according to the fixed time-frequency position of the main system message, the other system message blocks to be received are received at the determined time-frequency position.

In the specific implementation, after receiving the system information block 1, according to the scheduling information of other system information blocks carried in the system information block 1, determine the fixed time-frequency position carrying other system information blocks, and according to the received main system information block The system frame number in the system and the subframe number determined according to the fixed time-frequency position of the main system message can determine the corresponding fixed time-frequency position of other system message blocks that need to be received. Other system information blocks are received at the fixed resource block positions of the corresponding subframes of the carrier.

Preferably, at least one scheduling entry may be included in the system message block 1, and each scheduling entry includes a scheduling entry number or a scheduling entry number implicitly given by the order in which the scheduling entries appear in the scheduling information, and the scheduling The identification number of the system message block corresponding to the entry, the indication information of the resource block, and the recurring cycle of the system message block. The terminal device can determine the scheduling parameter value according to the scheduling entry number corresponding to the identification number of the other system information block that needs to be received, and determine the wireless frame where the other system information block is located according to the determined scheduling parameter value and the cycle of repeated occurrence of the system information block Therefore, the subframe number of the subframe where the other system information block is located is determined according to the determined scheduling parameter value, and finally, the position of the fixed resource block where the other system information block is located is determined according to the resource block indication information.

In a specific implementation, the system carrier may be an MTC (Machine Type Communication) dedicated carrier, and the main system message received at the fixed time-frequency position of the MTC dedicated carrier known in advance includes a message indicating that the current system carrier is an MTC dedicated carrier. identification information; and when confirming that the identification information included in the main system message can be identified, extracting the system frame number included in the main system message, and determining the subframe number according to the above-mentioned fixed time-frequency position.

Based on the same inventive concept, the embodiment of the present invention also provides a device and device for sending and receiving system messages. Since the principles of these sending and receiving devices and devices to solve problems are similar to the methods for sending and receiving system messages, these For the implementation of the device and equipment, refer to the implementation of the method, and repeated descriptions will not be repeated.

As shown in FIG. 5, an embodiment of the present invention provides a device for sending a system message, including:

The generating unit 501 is configured to generate a system information block 1 on a system carrier, where the system information block 1 includes scheduling information of other system information blocks (system information blocks 2 to N), and the scheduling information indicates that each other system information block is related to corresponding time-frequency position;

The sending unit 502 is configured to carry the generated system information block 1 on the system carrier and send it.

In a specific implementation, the generation unit 501 is configured to generate a system information block 1 on the system carrier, the system information block 1 includes scheduling information of other system information blocks, and the scheduling information indicates the time-frequency corresponding to each other system information block Location. The sending unit 502 is specifically configured to carry the system information block 1 generated by the generating unit 501 on the fifth subframe of the radio frame whose system frame number is an even number of the system carrier; The system information block 1 of the system carrier is sent at the fixed resource block position of the fifth subframe of the radio frame whose system frame number is an even number.

In a specific implementation, the generating unit 501 can also be used to generate other system information blocks on the system carrier; the sending unit 502 can also be used to carry each other system information block generated by the generating unit 501 on the other system information blocks indicated by the scheduling information. It is sent at the time-frequency position corresponding to the system message block.

In a specific implementation, the system carrier may be an MTC (Machine Type Communication) dedicated carrier, and the generating unit 501 may also be used to generate a main system message on the MTC dedicated carrier, and the main system message includes a message indicating that the current system carrier is an MTC dedicated carrier Identification information; the sending unit 502 may also be configured to carry the main system information generated by the generating unit 501 on the fixed resource block position of the 0th subframe of each radio frame and send it.

As shown in FIG. 6, an embodiment of the present invention provides a device for receiving system messages, including:

The receiving unit 601 is configured to receive system information block 1 on the system carrier according to the system frame number extracted from the received main system message and the subframe number determined according to the fixed time-frequency position of the main system message;

The extracting unit 602 is configured to extract the scheduling information of other system information blocks (system information blocks 2 to N) from the received system information block 1, and the scheduling information indicates the corresponding time-frequency position of each other system information block.

In specific implementation, the receiving device of the system message may also include:

A determining unit 603, configured to determine the time-frequency positions corresponding to other system information blocks to be received according to the scheduling information of other system information blocks extracted from system information block 1; and

The receiving unit 601 can also be configured to receive the other frames to be received at the determined time-frequency position according to the system frame number extracted from the main system message and the subframe number determined according to the time-frequency position of the main system message. System message block.

Wherein, the scheduling information includes at least one scheduling entry, and each scheduling entry includes a scheduling entry number or a scheduling entry number implicitly given by the order in which the scheduling entry appears in the scheduling information, and a system message corresponding to the scheduling entry The identification number of the block, the resource block indication information and the cycle of repeated appearance of the system message block; then the determining unit 603 specifically includes:

The first determining subunit 6031 is configured to determine the scheduling parameter value according to the corresponding scheduling entry numbers of other system message blocks that need to be received;

The second determination subunit 6032 is configured to determine the system frame number of the wireless frame where the other system information block is located according to the scheduling parameter value determined by the first determination subunit 6031 and the cycle of repeated occurrence of the system information block;

The third determination subunit 6033 is configured to determine the subframe number of the subframe where the other system information block is located according to the scheduling parameter value determined by the first determination subunit 6031;

The fourth determination subunit 6034 is configured to determine the position of the fixed resource block where the other system information block is located according to the resource block indication information.

In specific implementation, the system carrier can be an MTC (Machine Type Communication) dedicated carrier, and the system message receiving device can also include:

The judging unit 604 is configured to judge whether the identification information indicating that the current system carrier is an MTC dedicated carrier included in the received primary system message can be identified, and the primary system received at the fixed time-frequency position of the pre-known MTC dedicated carrier The identification information is included in the message;

The obtaining unit 605 is configured to extract the system frame number included in the main system message and determine the subframe number according to the fixed time-frequency position when the judging result is yes.

It should be noted that, the sending apparatus of the above-mentioned system messages is generally set in the base station equipment, and the receiving apparatus of the above-mentioned system messages is generally set in the terminal equipment.

The system message sending and receiving method provided by the embodiment of the present invention can be applied to a system supporting H2H (Human to Human) communication, a system supporting MTC (Machine Type Communication), and the like. It is especially applicable to the MTC-supporting system with small bandwidth and limited public search space. In order to better understand the present invention, the application in the MTC-supporting system is taken as an example below to describe the specific implementation manner of the embodiment of the present invention.

Considering that a new system message block may be introduced for the MTC service, therefore, in the embodiment of the present invention, in the system with small bandwidth and supporting MTC, system messages are divided into: main system message, system message block 1, and system message block 2. ..... system message block N, where N is an integer greater than or equal to 12.

Based on the division of system message blocks, the embodiment of the present invention provides a method for sending system messages in a system supporting MTC, including the sending of the main system message, the sending of system message block 1, and the sending of other system message blocks 2 to N, respectively. Make an introduction.

The sending method of the main system message in the system supporting MTC, as shown in Figure 7, includes the following steps:

S701. Generate a primary system message on an MTC (Machine Type Communication) dedicated carrier, where the primary system message includes identification information indicating that the current system carrier is an MTC dedicated carrier;

The generated main system message includes the carrier bandwidth information, the system frame number of the radio frame and the configuration information of the PHICH (Physical Hybrid Automatic Repeat Request Indication Channel), and the generated main system message also includes information indicating that the current system carrier is an MTC dedicated carrier. identification information.

In a specific implementation, an implementation scheme indicating that the current system carrier is an MTC dedicated carrier may be to set the carrier bandwidth information in the main system message to a carrier bandwidth value that cannot be recognized by ordinary terminals, but only MTC terminals can recognize the carrier bandwidth. value, and the carrier bandwidth value not only represents that the current carrier is an MTC dedicated carrier, but also represents the bandwidth of the current carrier.

S702. Carry the generated primary system message on the fixed time-frequency position of the dedicated MTC carrier and send it.

In a specific implementation, the primary system information is sent at the fixed resource block position of the 0th subframe of each radio frame of the dedicated carrier, and the fixed time-frequency position is known to the terminal device in advance.

The sending method of system message block 1 in the system supporting MTC, as shown in Figure 8, comprises the following steps:

S801. Generate a system message block 1 on an MTC (Machine Type Communication) dedicated carrier. The system message block 1 includes scheduling information of other system message blocks (system message blocks 2 to N), and the scheduling information is used to indicate each other The time-frequency position corresponding to the system message block;

S802. Carry the generated system information block 1 on the MTC dedicated carrier and send it.

Taking the scheduling information as setting a schedule table of other system message blocks in system message block 1 as an example, the sending of system message block 1 in a system supporting MTC for small bandwidth will be described below. In the implementation, the scheduling information takes the scheduling table as an example because it is easier to manage the scheduling of other system message blocks in this way, and it is also a relatively common management method; however, in theory, it is also possible to use other methods, as long as Any method that can schedule and manage other system message blocks is acceptable. The implementation of establishing other system message block schedules is only used to illustrate how to implement the present invention, but it does not mean that only the schedule can be used. During the implementation process, you can Combined with practical needs to determine the corresponding method.

The schedule for carrying the time-frequency positions of other system information blocks adopted in this embodiment may be set in the following format, as shown in Table 1.

Table 1

Scheduling entry number Corresponding system message block identification number Resource block indication information recurrence 1 System message block 2 x 80ms 2 System message blocks 3, 4, 5 Y 160ms

Wherein, the number of the scheduling entry may also be given in an implicit manner, that is, given by the sequence in which each scheduling entry in the scheduling table appears in the scheduling table. The system message block identification number corresponding to the scheduling entry is used to indicate which system message block or blocks the current scheduling entry corresponds to. The resource block indication information is used to indicate the specific position of the corresponding system information block carried on the PDSCH (Physical Downlink Shared Channel), that is, the corresponding system information block occupies the position of the PRB (Physical Resource Block, physical resource block) on the PDSCH and quantity. The resource block indication information can be set according to the RIV (Resource Indicator Value, resource block indication information) or Resource Block Assignment (resource block assignment) value carried in the PDCCH (Physical Downlink Control Channel) in 3GPP protocols 36.213 and 36.212. The recurrence period is used to indicate the period in which the system message block recurs. The terminal device can receive the required system information block according to the cycle of repeated appearance of the system information block according to the requirement.

For example, as shown in Table 1, the system information block corresponding to the scheduling entry whose scheduling entry number is 1 is system information block 2. According to the resource block indication information, the system information block 2 is carried on the X position of the PDSCH, and the system information block Block 2 is sent repeatedly every 80ms; the system information blocks corresponding to the scheduling entry number 2 are system information blocks 3, 4, and 5. According to the resource block indication information, the three system information blocks are carried on the Y position of PDSCH , the 3 system message blocks are sent repeatedly every 160ms.

The sending method of other system information blocks (system information blocks 2 to N) in the system supporting MTC, as shown in Figure 9, includes the following steps:

S901. Generate other system information blocks 2 to N on the MTC (Machine Type Communication) dedicated carrier;

S902. Carry each generated other system information block at the time-frequency position corresponding to the other system information block indicated by the scheduling information, and send it.

Correspondingly, the embodiment of the present invention provides a method for receiving system messages in a system supporting MTC, including receiving a main system message, receiving system message block 1, and receiving other system message blocks 2 to N, which will be introduced respectively below.

The method for receiving the main system message in the system supporting MTC, as shown in Figure 10, includes the following steps:

S1001. Receive a primary system message at a pre-known fixed time-frequency position, where the primary system message includes identification information indicating that the current system carrier is an MTC (Machine Type Communication) dedicated carrier;

S1002. When it is confirmed that the identification information included in the main system message can be identified, acquire a system frame number carried in the main system message, and determine a subframe number according to the fixed time-frequency position.

In a specific implementation, the primary system message is received at the fixed resource block position of the 0th subframe of each radio frame of the dedicated carrier, and the primary system message includes identification information indicating that the current system carrier is an MTC dedicated carrier. The terminal device confirms whether it can identify the identification information, and if it can, obtains the system frame number carried in the main system message and determines the subframe number carrying the main system message.

The method for receiving system message block 1 in a system supporting MTC, as shown in Figure 11, includes the following steps:

S1101. According to the system frame number extracted from the main system message and the subframe number determined according to the main system message, receive system message block 1 on an MTC (Machine Type Communication) dedicated carrier;

S1102. Extract the scheduling information of other system information blocks (system information blocks 2 to N) from the received system information block 1, where the scheduling information is used to indicate the corresponding time-frequency position of each other system information block.

The receiving method of other system information blocks (system information blocks 2 to N) in the system supporting MTC communication, as shown in Figure 12, includes the following steps:

S1201. According to the scheduling information of other system information blocks extracted from system information block 1, determine the time-frequency positions corresponding to other system information blocks to be received;

S1202. According to the system frame number extracted from the main system message and the determined subframe number according to the main system message, receive the other system message blocks to be received at the determined time-frequency position.

The scheduling information of the time-frequency positions of other system information blocks is described below by taking the scheduling table as an example to illustrate the receiving method of other system information blocks. In this embodiment, the method for determining the resource block carrying the system information block N (N is an integer greater than or equal to 2) is: find the scheduling entry number n corresponding to the system information block N in the scheduling table, if the scheduling entry number is hidden In this way, the number n of the scheduling entry can be obtained by observing the position of the scheduling entry in the entire scheduling table. Calculate x=(n-1)×w, w is the length of the scheduling window, x is an integer, and the SFN (System Frequency Number, system frame number) of the wireless frame carrying the system message block N should satisfy: SFN mod T = FLOOR(x /10), wherein, T is the repetition period of the other system information blocks in the scheduling table, and the subframe number SUB in which the system information block N appears should satisfy SUB=x mod 10. After the SFN and SUB are determined, the fixed resource block position of the system information block N on the subframe is determined according to the resource block indication information in the scheduling table. After the terminal device determines the time-frequency position of other system information blocks that need to be received, it can receive the other system information blocks at the determined time-frequency position, so that the terminal device does not need to perform blind detection when receiving other system information blocks up.

The method, device and device for sending and receiving system messages provided by the embodiments of the present invention carry scheduling information of other system message blocks (system message blocks 2 to N) in system message block 1 when sending system messages, and the scheduling information Indicate the time-frequency position corresponding to each other system information block; when sending other system information blocks, carry other system information blocks on the time-frequency position indicated by the scheduling information and send; thus no need for common search in the corresponding subframe The PDCCH including the SI-RNTI is placed in the space to indicate the position of the resource block occupied by other system information blocks, so there is no need to occupy the common search space of the corresponding subframe, thereby reducing the common search space resources occupied when sending the system information. When receiving system information, it only needs to receive other corresponding system information blocks at the time-frequency position indicated by it according to the scheduling information of other system information blocks carried in system information block 1, without needing to be in the common search space of the corresponding subframe Blind detection is performed to reduce energy consumption when receiving system messages. The method, device and equipment for sending and receiving system messages provided by the embodiments of the present invention are especially suitable for communication systems with small bandwidth and limited public search space.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (22)

1. A method for sending a system message, comprising: Generate a system information block 1 on the system carrier, the system information block 1 includes scheduling information of other system information blocks 2 to N, and the scheduling information indicates the time-frequency position corresponding to each other system information block; The generated system information block 1 is carried on the system carrier and sent. 2. The method according to claim 1, wherein said sending the generated system message block 1 on the system carrier, specifically comprises: carrying the generated system message block 1 on the fifth subframe of the radio frame whose system frame number of the system carrier is even; or, The generated system information block 1 is borne on the fixed resource block position of the fifth subframe of the radio frame whose system frame number of the system carrier is even and sent. 3. The method according to claim 1, wherein the scheduling information includes at least one scheduling entry, and each scheduling entry includes a scheduling entry number or is implicitly given by the order in which the scheduling entries appear in the scheduling information. The output scheduling entry number, the identification numbers of other system message blocks corresponding to the scheduling entry, the resource block indication information, and the recurrence period of other system message blocks. 4. The method of claim 1, further comprising: Generate other system information blocks 2 to N on the system carrier; Each of the generated other system information blocks is respectively carried and sent at the time-frequency position corresponding to the other system information blocks indicated by the scheduling information. 5. The method according to any one of claims 1 to 4, wherein the system carrier includes a dedicated carrier for Machine Type Communication (MTC). 6. The method according to claim 5, wherein the primary system message on the MTC dedicated carrier includes identification information indicating that the current system carrier is an MTC dedicated carrier; and The main system message sent on the MTC dedicated carrier is sent on the fixed resource block position of the 0th subframe of each radio frame. 7. The method according to claim 6, wherein the identification information indicating that the current system carrier is an MTC dedicated carrier is set to be identifiable only by the MTC terminal by setting the carrier bandwidth information included in the main system message The carrier bandwidth value is implemented. 8. A method for receiving a system message, comprising: Receive system message block 1 on the system carrier according to the system frame number extracted from the received main system message and the subframe number determined according to the fixed time-frequency position of the main system message; The scheduling information of other system information blocks 2 to N is extracted from the received system information block 1, and the scheduling information indicates the corresponding time-frequency position of each other system information block. 9. The method of claim 8, further comprising: According to the scheduling information of other system information blocks 2 to N extracted from system information block 1, determine the time-frequency positions corresponding to other system information blocks to be received; According to the system frame number extracted from the main system message and the subframe number determined according to the fixed time-frequency position of the main system message, the other system message blocks to be received are received at the determined time-frequency position. 10. The method according to claim 9, wherein the scheduling information includes at least one scheduling entry, and each scheduling entry includes a scheduling entry number or is implicitly given by the order in which the scheduling entries appear in the scheduling information. The scheduling entry number, the identification number of other system information blocks corresponding to the scheduling entry, the resource block indication information, and the recurrence period of other system information blocks; and According to the scheduling information of other system information blocks 2 to N extracted from system information block 1, determining the time-frequency positions corresponding to other system information blocks to be received specifically includes: Determine the scheduling parameter value according to the scheduling entry number corresponding to the identification number of other system message blocks that need to be received; Determine the system frame number of the radio frame where the other system information blocks to be received are located according to the determined scheduling parameter value and the period of recurrence of other system information blocks; Determine the subframe number of the subframe where the other system message blocks to be received are located according to the determined scheduling parameter value; The position of the fixed resource block where the other system information block that needs to be received is determined according to the resource block indication information. 11. The method according to claim 8, 9 or 10, wherein the system carrier includes a machine type communication (MTC) dedicated carrier. 12. The method according to claim 11, wherein the primary system message received at the fixed time-frequency position of the MTC dedicated carrier known in advance includes identification information indicating that the current system carrier is an MTC dedicated carrier; as well as When it is confirmed that the identification information included in the main system message can be identified, extract the system frame number included in the main system message, and determine the subframe number according to the fixed time-frequency position. 13. A device for sending a system message, comprising: A generation unit, configured to generate a system information block 1 on a system carrier, the system information block 1 including scheduling information of other system information blocks 2 to N, the scheduling information indicating the time frequency corresponding to each other system information block Location; The sending unit is configured to carry the generated system information block 1 on the system carrier and send it. 14. The apparatus of claim 13, wherein The sending unit is specifically configured to carry the generated system message block 1 on the No. 5 subframe of the even radio frame of the dedicated carrier and send it; or, The sending unit is specifically configured to carry the generated system information block 1 on the fixed resource block position of the fifth subframe of the even-numbered radio frame of the dedicated carrier and send it. 15. The apparatus of claim 13, wherein: The generating unit is further configured to generate other system information blocks 2 to N on the system carrier; The sending unit is further configured to respectively bear each generated other system information block at the time-frequency position corresponding to the other system information block indicated by the scheduling information and send it. 16. The apparatus according to claim 13, 14 or 15, wherein the system carrier comprises a machine type communication (MTC) dedicated carrier; and The generating unit is further configured to generate a primary system message on an MTC dedicated carrier, where the primary system message includes identification information indicating that the current system carrier is an MTC dedicated carrier; The sending unit is further configured to carry the generated main system information on the fixed resource block position of the 0th subframe of each radio frame and send it. 17. A base station device, characterized by comprising the sending device according to any one of claims 14 to 16. 18. A device for receiving system messages, comprising: The receiving unit is configured to receive system information block 1 on the system carrier according to the system frame number extracted from the received main system message and the subframe number determined according to the fixed time-frequency position of the main system message; The extracting unit is configured to extract the scheduling information of other system information blocks 2 to N from the received system information block 1, and the scheduling information indicates the corresponding time-frequency position of each other system information block. 19. The apparatus of claim 18, further comprising: A determining unit, configured to determine the time-frequency positions corresponding to other system information blocks to be received according to the scheduling information of other system information blocks 2 to N extracted from system information block 1; and The receiving unit is further configured to receive the frame number to be received at the determined time-frequency position according to the system frame number extracted from the main system message and the subframe number determined according to the time-frequency position of the main system message Other system message blocks. 20. The device according to claim 19, wherein the scheduling information includes at least one scheduling entry, and each scheduling entry includes a scheduling entry number or is implicitly given by the order in which the scheduling entries appear in the scheduling information. The scheduling entry number, the identification number of other system information blocks corresponding to the scheduling entry, the resource block indication information, and the recurrence period of other system information blocks; and The determining unit specifically includes: The first determination subunit is configured to determine the scheduling parameter value according to the scheduling entry number corresponding to the identification number of other system message blocks that need to be received; The second determining subunit is configured to determine the system frame number of the wireless frame where the other system information block to be received is located according to the determined scheduling parameter value and the period of recurrence of other system information blocks; The third determining subunit is configured to determine the subframe number of the subframe where the other system information block to be received is located according to the determined scheduling parameter value; The fourth determining subunit is configured to determine the position of the fixed resource block where the other system information block that needs to be received is located according to the resource block indication information. 21. The device according to claim 18, 19 or 20, wherein the system carrier comprises a machine type communication (MTC) dedicated carrier, and the device further comprises: A judging unit, configured to judge whether it is possible to identify the identification information indicating that the current system carrier is a machine type communication (MTC) dedicated carrier included in the received main system message, wherein the received information is received at a fixed time-frequency position of a pre-known MTC dedicated carrier The received main system message includes the identification information; The obtaining unit is configured to extract the system frame number included in the main system message and determine the subframe number according to the fixed time-frequency position when the judging result is yes. 22. A terminal device, characterized by comprising the receiving device according to any one of claims 18-21.

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