WO2007090357A1

WO2007090357A1 - A method, device and system for hybrid automatic repeat

Info

Publication number: WO2007090357A1
Application number: PCT/CN2007/000487
Authority: WO
Inventors: Deping Liu; Xin Han; Linhong Chen; Sha Ma
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-02-10
Filing date: 2007-02-12
Publication date: 2007-08-16

Abstract

A method, device and system for hybrid automatic repeat are disclosed. The transmitter side transmits a number of data units to the receiver side in the same time transmission internal; the receiver side demodulates, decodes and checks every data unit and transmits the response information corresponding to whether every data unit is right or not to the transmitter side; the transmitter side retransmits the data unit which is not transmitted successfully within the HARQ maximum transmission time according to the response information; after receiving the retransmitted data unit, the physics layer of the receiver side combines, demodulates, decodes, checks, orders and stores, and transmits the response information corresponding to whether the corresponding every data unit is right or not to the transmitter side. The invention can effectively save the physics resource, reduce the processing time for the data block and increase the efficiency of data transmission.

Description

Hybrid automatic retransmission method, device and system

TECHNICAL FIELD The present invention relates to communication technologies, and in particular, to a hybrid automatic retransmission method, apparatus, and system.

Background of the invention

Automatic Repeat ReQuest (ARQ) is a transmission mechanism used to ensure the reliability of transmission. When a current attempt fails to transmit, it is required to retransmit the data unit that failed to transmit. HARQ (Hybrid ARQ) is an improvement of the ARQ protocol, which introduces a FEC subsystem in the ARQ system. This FEC subsystem is used to correct errors to reduce the number of retransmissions. Stop and Wait (SAW) is the simplest form of HARQ: The sender only starts processing the next data unit after the transmitted data unit is correctly received. The receiver should transmit a signal to the sender for transmission. The response information of the data unit is correctly decoded, generally to confirm the correct information and confirm the error information (AC / NAK, ACI nowledgement / Negative AcKnowledgement), this confirmation information generally uses one bit. The N-channel, etc., HARQ (N-channel-SAW- HARQ) is a HARQ process in which N SAWs are simultaneously performed in parallel on one channel. When the downlink is used by a HARQ process to transmit data units, the uplink is used to transmit response information for other HARQ processes. The data unit refers to a data block to which a check code (such as a cyclic redundancy check code CRC) is added.

Currently, in systems with high peak rate requirements, such as Orthogonal Frequency Division Multiplexing (OFDM) systems, in order to achieve high-speed transmission of a single UE, it is generally within a time transmission unit (TTL). Multiple resource blocks are allocated, and each resource block transmits a part of data of one MAC PDU. Each resource block may be in error during transmission, and each MAC PDU needs to be checked and received as a whole. Therefore, if the data transmitted by one resource block is in error, it may cause all the MAC PDUs to be retransmitted. The more the number of blocks, the more likely it is to go wrong. The technical solution of retransmission of the above data wastes data transmission resources and time, and the data transmission efficiency is low. At the same time, the physical layer of the receiving end needs to collect the data transmitted by all the resource blocks and perform the check processing. Therefore, the receiving end performs the verification processing on the data for a long time.

There is also a technical solution for data transmission. The specific process is as follows: The upper layer of the transmitting end hands over a data block to the physical layer, and after receiving the MAC PDU, the physical layer cuts the data into a plurality of data blocks, adds a check code to each data block, and performs coding and modulation processing. At the same time, the transmission unit transmits to the receiving end. A high level is a layer immediately adjacent to the physical layer. The receiving end physical layer performs demodulation and decoding check processing on each data unit in the same time transmission unit. If all the data units are correct, the receiving end physical layer restores all the data blocks into one data block to the upper layer, and transmits to the transmitting end. The physical layer feeds back an ACK signal; if one or more of the physical layer data blocks are incorrect, the receiving end is physically The layer will feed back a NACK signal to the physical layer of the transmitting end, and notify the transmitting end to retransmit all the data blocks.

Although the receiving end physical layer can perform parallel receiving processing on each data block in the same time transmission unit, since the receiving end notifies the transmitting end to retransmit all the data units when one or more data blocks are wrong, there is also an invalid weight. The possibility of transmission, wasting data transmission resources and time, resulting in inefficient data transmission.

In summary, in the prior art, the hybrid automatic retransmission method has the disadvantage that, in the data transmission process, if the transmitting end receives the NACK response information fed back by the receiving end, even if it is only one physical layer data belonging to the upper layer data block. If the block is faulty, the sender must also retransmit all physical layer data blocks belonging to the same high-level data block, thereby wasting physical resources and reducing transmission efficiency. SUMMARY OF THE INVENTION Embodiments of the present invention provide a hybrid automatic retransmission method apparatus and system, which can reduce data processing delay at a receiving end, and can effectively avoid an invalid retransmission problem, thereby improving data transmission efficiency.

The embodiments of the present invention are implemented by the following technical solutions:

An embodiment of the present invention provides a hybrid automatic retransmission method, including:

The transmitting end sends the plurality of data units to the receiving end at the same time;

The receiving end performs demodulation decoding, verification processing and sorting storage for each data unit, and sends corresponding response information of each data unit to the transmitting end;

The transmitting end performs data retransmission on the erroneous data unit that has not reached the maximum number of retransmissions according to the response information; after receiving the retransmitted data unit, the receiving end performs merging, demodulation decoding, and checksum sorting storage, and sends the data to the transmitting unit. The terminal sends the corresponding response information of each data unit correctly. An embodiment of the present invention provides a hybrid automatic retransmission sending apparatus, including: a data sending module and a data feedback result processing module;

The data sending module is configured to send, by the transmitting unit, the data unit encapsulated by the plurality of data blocks to the receiving end at the same time;

The data feedback result processing module is configured to receive response information of the data unit, and perform data retransmission on the erroneous data unit that does not reach the maximum number of retransmissions according to the response information. An embodiment of the present invention provides a hybrid automatic retransmission receiving apparatus, including: a data receiving module, a response module, and a sorting storage module; The data receiving module is disposed at a physical layer, configured to receive a data unit, perform merging, demodulating, decoding, and receiving each of the received data units, and send the verification result to the response module;

The response module is disposed at the physical layer, and configured to send the response information according to the verification result of the data receiving module;

The sorting storage module is disposed at a physical layer for sorting data units received by the data receiving module. The embodiment of the invention provides a hybrid automatic retransmission system, comprising: the foregoing hybrid automatic retransmission transmitting device and hybrid automatic retransmission receiving device.

It can be seen from the technical solutions provided by the foregoing embodiments of the present invention that the technical solutions provided by the embodiments of the present invention have the following advantages:

1. The transmitting end can use multiple HARQ processes to transmit multiple data units to the receiving end at the same time, and the receiving end can verify each data unit at the same time, so that the data unit processing at the receiving end can be reduced. Delay

2. The receiving end performs HARQ feedback to the transmitting end for each data unit, so that the data unit can be effectively prevented from being retransmitted in an invalid manner, and the data unit transmission resources and time are saved, thereby greatly improving the data unit transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

1 is a flow chart of a method according to an embodiment of the present invention;

2 is a flow chart of Embodiment 1 of the method according to an embodiment of the present invention;

3 is a flow chart of Embodiment 2 of the method according to the embodiment of the present invention;

4A is a diagram showing an example of a structure of a data transmitting module in an automatic hybrid retransmission transmitting apparatus according to an embodiment of the present invention; FIG. 4B is a second structural diagram of a data transmitting module in an automatic hybrid retransmission transmitting apparatus according to an embodiment of the present invention; FIG. 5 is a schematic structural diagram of a system according to an embodiment of the present invention. FIG. 5 is a schematic structural diagram of a system according to an embodiment of the present invention.

Mode for carrying out the invention

In order to make the content of the embodiments of the present invention easier to understand, the following detailed description will be made with reference to the accompanying drawings and specific embodiments.

Referring to FIG. 1 , a technical solution of an embodiment of the present invention includes:

Step A: The transmitting end sends a plurality of data units to the receiving end at the same time.

Step B: The receiving end performs demodulation decoding, verification processing, and sorting storage on each data unit, and sends the data to the transmitting end. Send the corresponding response information of each data unit correctly.

Step c: The transmitting end performs data retransmission on the erroneous data unit that does not reach the predetermined maximum number of retransmissions according to the response information.

Step D: After receiving the retransmitted data unit, the physical layer of the receiving end performs combining, demodulating, decoding, verifying, and sorting storage, and transmitting corresponding response information of each data unit to the transmitting end.

Specifically, in the foregoing implementation manner, according to the different sources of the multiple data units, there are two cases. One is that multiple data units in step A are generated by the upper layer of the sending end, and the other is generated. The plurality of data units in step A are generated after the correlation processing is performed by the physical layer of the transmitting end. The high layer referred to in the embodiment of the present invention refers to a layer immediately adjacent to the physical layer. For the WCDMA system, it may refer to the medium access control layer MAC, and for the implemented wireless communication system, it may refer to the evolved medium access control layer E-MAC, but may also be other layers.

Referring to FIG. 2, the first embodiment described above is explained in detail, and includes the following steps:

Step 1A: The transmitting end layer submits a plurality of data blocks to the physical layer of the transmitting end, and the physical layer of the transmitting end encapsulates the plurality of data blocks into data units respectively; and sends the encapsulated data units to the transmitting unit at the same time. Receiving end.

Specifically, the upper layer of the transmitting end splits the data to be transmitted into multiple data blocks according to the amount of data transmitted by the upper layer; or, the upper layer of the transmitting end splits into multiple data blocks according to the service type of the data to be transmitted (the splitting method) It is not limited to the method enumerated in the embodiment); the determined plurality of data blocks are delivered to the physical layer. The physical layer adds an error detection code (such as a cyclic redundancy check code) to the received data block and encapsulates it into a data unit, and performs code modulation and transmission at the same time transmission unit.

Before this step, the upper layer of the transmitting end may determine whether it is necessary to split a plurality of data blocks according to a certain scheduling algorithm according to a current channel condition and a service characteristic.

Step 1B: The receiving end physical layer demodulates, decodes, checks, and sorts the received data unit, and sets corresponding response information according to the verification result to send to the sending end. The response information includes ACK and NAK.

Step 1C After receiving the response message, the sender retransmits the data unit that has transmitted the error but has not reached the maximum number of retransmissions.

Step 1D After receiving the retransmitted data unit, the physical layer of the receiving end performs combining, demodulating, decoding, verifying, and sorting storage, and transmitting corresponding response information of each data unit to the transmitting end. Referring to FIG. 3, the second embodiment described above is described in detail below, including the following steps:

Step 2A: The physical layer of the transmitting end cuts the data block submitted by the upper layer of the transmitting end into multiple sub-blocks, and respectively Encapsulated into data units; in the same time transmission unit, the encapsulated data unit is sent to the receiving end.

Specifically, the physical layer of the transmitting end cuts the data block that needs to be transmitted according to the optimal processing capability of the encoder or the amount of information that the unit transmission unit can carry. If the data block submitted by the upper layer of the transmitting end exceeds the optimal processing capability of the encoder or the amount of information that can be carried by the unit transmission unit, the data block is cut into a plurality of sub-blocks to ensure that each sub-block is in the encoder. The optimal processing power is either within the range of the amount of information that the unit transmission unit can carry. After that, an error detection code (such as a cyclic redundancy check code) is added to the cut sub-blocks to be encapsulated into data units, stored, and coded and modulated, and then transmitted at the same time. The unit transmission unit is a time-frequency two-dimensional quantity.

Step 2B: The receiving end performs demodulation decoding, verification processing, and sorting storage for each data unit, and sends corresponding response information of each data unit to the transmitting end.

The process of sorting and storing may be: sorting according to the check result according to the order of the received data units in the sending end. After that, the correct sub-block is stored and stored. The stored form can be the decoded value or other methods. Alternatively, the data unit transmitting the correct sub-block and the transmission error may be stored at the same time, and the stored form may be a value before demodulation, a value after soft demodulation or a value after soft decoding, or may be other methods. In this case, the data unit that transmitted the error is used for merging with the corresponding retransmitted data unit.

Step 2C: The transmitting end performs data retransmission on the erroneous data unit according to the response information;

After receiving the response information, the physical layer of the transmitting end determines the encoding mode and the modulation mode and then performs code modulation on the data unit that transmits the error, and maps the erroneous one or more data units to the unit transmission unit for retransmission. Until the response information fed back by the physical layer of the receiver, the data unit transmits correctly or the number of retransmissions reaches a predetermined maximum number of retransmissions, and the corresponding storage unit can be emptied.

Specifically, the foregoing determining the coding mode and the modulation mode may be: the high layer sends a coded modulation format selected according to a current physical channel condition, or the system presets a coded modulation format. The coded modulation format may be the same as or different from the original coding and modulation format of the data unit.

Step 2D: After receiving the retransmitted data unit, the receiving end physical layer performs merging, demodulation decoding, and checksum sorting storage, and sends corresponding response information of each data unit to the transmitting end.

Specifically, the above merged process is prior art, directly performing demodulation decoding and verification or combining with stored corresponding data units, such as maximum ratio combining, equal gain combining or other combining manner. Demodulation (also before the combination) is performed for decoding and verification, and corresponding response information is set and sent to the transmitting end according to the verification result. For this time, the correct sub-blocks are received, and the order of the HARQ process numbers of each data unit or the order of the physical resources is reordered with other sub-blocks that are received correctly by the receiving end physical layer. Storage transfer The correct sub-block, or similar to the above, includes the transmission of the correct sub-block and the transmission of the data unit. Step 2E: When all sub-blocks are transmitted correctly or the number of retransmissions of the erroneous sub-data unit reaches a predetermined maximum number of retransmissions, the physical layer of the receiving end combines all the sub-blocks received into one total data block or reorders. After that, a total data block is formed and sent to the upper layer of the receiving end. The ordering principle is the same as the ordering principle in the above steps. All of the sub-blocks include the transmission of the correct sub-block and the erroneous data unit that retransmits more than the maximum number of retransmissions.

For any of the foregoing specific embodiments, the multiple data units may belong to different hybrid automatic repeat (HARQ) processes, or may belong to the same HARQ process; the response information generally includes ACK and NAK, when multiple data When the units belong to different HARQ processes, the response information may be sorted according to the order of the HARQ process numbers, and the sorted response information is sent to the sending end. When multiple data units belong to the same HARQ process, the information may be occupied. The order of the physical resources is sorted, the response information is sorted, and the sorted response information is sent to the sender.

For any of the foregoing embodiments, the receiving end sending the response information to the sending end may be as follows:

Manner 1: Send the response message to the sender using the code division method.

For example, the codeword corresponding to each process/data unit is determined according to each process number/data unit or according to a predetermined algorithm, and the response information is modulated to be transmitted to the corresponding codeword. The process number refers to a HARQ process number, which is used to identify different HARQ processes.

Manner 2: Send a response message to the sender in frequency division mode.

The specific process is as follows: Assume that the system only allows a maximum of 8 data units to be transmitted simultaneously. The receiving end divides the bandwidth used for transmitting the response information into 8 sub-bands, then establishes a correspondence between each sub-band and each process number/data unit and notifies the transmitting end. When the receiving end physical layer needs to feed back the response information of each data unit to the physical layer of the transmitting end, the response information of each data unit is sent to the sending by the sub-band corresponding to the data unit or the process corresponding to the data unit. The physical layer of the transmitting end determines the corresponding process number or data unit response information according to the correspondence between the subband and the process number/data unit.

Manner 3: When the receiving end sends the response information of each data unit to the sending end, it needs to carry the information indicating the corresponding process number. In this manner, the physical layer of the transmitting end determines whether the data of the corresponding process is correctly received according to the response information carrying the corresponding process number information.

For the foregoing specific implementation examples, in the same time transmission unit, the receiving end may carry the response information of each data unit in the response channel and send it to the sending end; or may transmit the response information of the multiple data units to The same acknowledgement channel is sent to the sender. The response channel refers to a channel for carrying user response information. Corresponding to the foregoing method embodiment, the embodiment of the present invention further provides a hybrid automatic retransmission sending device. The sending device in this embodiment includes: a data sending module and a data feedback result processing module.

Preferably, as shown in FIG. 4A, the data sending module may further be: a first sending data determining module and a first sending module.

The first sending data determining module is disposed at a higher layer, and is configured to split the data transmitted by the upper layer into a plurality of data blocks and send the data to the physical layer;

The first sending module is configured to be configured to encapsulate the plurality of data blocks into data units, and send the encapsulated data units to the receiving end in the same time transmission unit.

Preferably, as shown in FIG. 4B, the data sending module may further include: a determining module and a second sending data determining module, and a first sending module, where the determining module is configured to use a certain scheduling algorithm according to a current scheduling algorithm. The channel status and the service characteristic determine whether it is necessary to split the data transmitted by the upper layer into a plurality of data blocks; the second sending data determining module is disposed at a higher layer, and is configured to: according to the determining module, the data transmitted by the upper layer when determining that the splitting is needed Splitting into multiple data blocks and transmitting to the physical layer; the first sending module is disposed at the physical layer, and is configured to encapsulate the plurality of data blocks into data units respectively; and at the same time, the encapsulated data in the transmission unit The unit is sent to the receiving end.

Preferably, as shown in FIG. 4C, the data sending module may further be: a cutting module and a second sending module; the cutting module is disposed at a physical layer, and is configured to cut a data block submitted by a higher layer into multiple sub-blocks. . The cutting principle may be: cutting a portion of the data block to be transmitted that exceeds an optimal processing capability of the encoder or an amount of information that the unit transmission unit can carry; the second sending module is disposed at the physical layer, and is configured to: The plurality of sub-blocks generated by the dicing module are respectively encapsulated into data units; and in the same time transmission unit, the encapsulated data units are sent to the receiving end.

The data feedback result processing module is configured to receive response information of the data unit, and perform data retransmission on the erroneous data unit that does not reach the maximum number of retransmissions according to the response information.

Corresponding to the foregoing method embodiment, the embodiment of the present invention further provides a hybrid automatic retransmission receiving device. The receiving device in this embodiment includes: a data receiving module, a response module, and a sorting storage module.

The data receiving module is disposed at a physical layer, configured to receive a data unit, perform merging, demodulating, decoding, and receiving each of the received data units, and send the verification result to the response module.

The response module is disposed at the physical layer, and configured to send a response message according to the verification result of the data receiving module Interest.

The sorting storage module is disposed at the physical layer for sorting the data unit received by the storage data receiving module, and can store and transmit the correct data unit, or simultaneously store the data unit with the correct data unit and the transmission error.

When the received data unit is a sub-data block after the physical layer of the transmitting end is cut, the device further includes:

The data reporting module is configured at the physical layer, and is configured to form all the total data data blocks into a total data when the number of retransmissions of all sub-blocks transmitted correctly or the wrong sub-data unit reaches a predetermined maximum number of retransmissions. After the block or reordering, a total data block is formed and sent to the upper layer of the receiving end. The all sub-blocks include erroneous data units that transmit the correct sub-blocks and retransmits more than the maximum number of retransmissions. As shown in FIG. 5, an embodiment of the present invention further provides a hybrid automatic retransmission system, where the system includes a transmitting device and a receiving device, and the transmitting device is provided with: a data sending module and a data feedback result processing module.

Preferably, the data sending module may further be: a first sending data determining module and a first sending module. The first sending data determining module is disposed at a higher layer, and is configured to split the data transmitted by the upper layer into a plurality of data blocks and send the data to the physical layer;

Preferably, the data sending module may further include: a determining module, a second sending data determining module, and a first sending module, where the determining module is configured to determine, according to a certain scheduling algorithm, current channel conditions and service characteristics. Whether it is necessary to split the data transmitted by the upper layer into a plurality of data blocks; the second sending data determining module is disposed at a high level, and is configured to split the data transmitted by the upper layer into multiple data according to the determining module when determining that the splitting is needed The block is sent to the physical layer; the first sending module is disposed at the physical layer, and is configured to encapsulate the plurality of data blocks into data units respectively; and in the same time transmission unit, send the encapsulated data unit to the receiving end.

Preferably, the data sending module may further be: a cutting module and a second sending module; the cutting module is disposed at a physical layer, and is configured to cut the data blocks submitted by the higher layer into a plurality of sub-blocks. The cutting principle may be: cutting a portion of the data block to be transmitted that exceeds an optimal processing capability of the encoder or an amount of information that the unit transmission unit can carry; the second sending module is disposed at the physical layer, and is configured to: Generated by the cutting module The plurality of sub-blocks are respectively encapsulated into data units; and the encapsulated data units are sent to the receiving end in the same time transmission unit.

The receiving device includes: a data receiving module, a response module, and a sorting storage module.

The response module is disposed at the physical layer, and configured to send the response information according to the verification result of the data receiving module.

The data reporting module is configured at the physical layer, and is configured to form all the total data data blocks into a total data when the number of retransmissions of all sub-blocks transmitted correctly or the wrong sub-data unit reaches a predetermined maximum number of retransmissions. After the block or reordering, a total data block is formed and sent to the upper layer of the receiving end. The all sub-blocks include erroneous data units that transmit the correct sub-blocks and retransmits more than the maximum number of retransmissions.

The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Claims

Claim

A hybrid automatic retransmission method, comprising:

The transmitting end performs data retransmission on the erroneous data unit that has not reached the maximum number of retransmissions according to the response information; after receiving the retransmitted data unit, the receiving end performs merging, demodulation decoding, and checksum sorting storage, and sends the data to the transmitting unit. The terminal sends the corresponding response information of each data unit correctly.

2. The method according to claim 1, wherein the transmitting end sends the data unit to the receiving end at the same time by the transmitting unit:

The high layer of the transmitting end delivers a plurality of data blocks to the physical layer of the transmitting end, and the physical layer of the transmitting end encapsulates the plurality of data blocks into data units, respectively; and transmits the encapsulated data unit to the receiving end in the transmitting unit at the same time;

The method according to claim 1, wherein the transmitting end sends the data unit to the receiving end at the same time by the transmitting unit:

The physical layer of the transmitting end cuts the data block submitted by the upper layer of the transmitting end into a plurality of sub-blocks, and respectively encapsulates them into data units. In the same time, the data unit is sent to the receiving end.

The method of claim 2, wherein the method of the upper layer of the transmitting end splits the data transmitted by the upper layer into a plurality of data blocks, the method further includes:

According to a certain scheduling algorithm, it is determined whether the data to be transmitted needs to be split into multiple data blocks for the current channel condition and service characteristics.

The method according to claim 2, wherein the method for the upper layer of the transmitting end to split the data transmitted by the upper layer into the plurality of data blocks comprises:

The transmitting end layer splits the data to be transmitted into a plurality of data blocks according to the amount of data transmitted by the upper layer; or, the transmitting end layer is split into a plurality of data blocks according to the service type of the data to be transmitted.

The method according to claim 3, wherein the method for the physical layer of the transmitting end to cut the data block submitted by the transmitting end to the plurality of sub-blocks includes:

The physical layer of the transmitting end determines whether the data block submitted by the upper layer needs to be cut according to the optimal processing capability of the encoder or the amount of information that the unit transmission unit can bear;

If dicing is required, the data block is diced into a plurality of sub-blocks, ensuring that each sub-block is within the range of the optimal processing power of the encoder or the amount of information that the unit of transmission unit can carry.

7. The method according to claim 1, wherein the receiving end of the method for sorting the received data unit comprises:

The physical layer of the receiving end sorts the data units according to the verification result according to the sequence of the received data units at the transmitting end; or

When the plurality of data units respectively belong to different HARQ processes, the data units are sorted according to the order of the HARQ process numbers;

When the plurality of data units belong to the same HARQ process, the data units are sorted according to an agreed order of physical resources occupied by each data unit.

8. The method of claim 1, wherein the stored data comprises:

Store the correct data unit; or,

At the same time, it stores the correct data unit and the wrong data unit.

9. The method of claim 3, wherein the stored data comprises:

Store the decoded value of the correct data unit; or,

At the same time, the decoded value of the transmitted correct data unit and the pre-demodulation or soft-decoded or soft-demodulated value of the data unit in which the error was transmitted are stored.

The method of claim 3, wherein the method further comprises:

When all sub-blocks are transmitted correctly or the number of retransmissions of the erroneous sub-data unit reaches a predetermined maximum number of retransmissions, the physical layer of the receiving end combines all the sub-blocks received into one total data block or reorders to form a The total data block is sent to the receiver's upper layer.

The method according to claim 1, wherein the method for the data retransmission of the erroneous data unit that does not reach the maximum number of retransmissions according to the response information by the sending end includes:

After determining the coding mode and modulation mode of the erroneous data unit that does not reach the maximum number of retransmissions, the coding is modulated, and then mapped to the unit transmission unit for retransmission.

The method according to claim 11, wherein the process of determining the coding mode and the modulation mode is specifically:

The transmitting end layer sends a coded modulation format selected based on the current physical channel condition; or

The system presets the code modulation format.

The method according to claim 1, wherein the plurality of data units sent by the transmitting end belong to different hybrid automatic retransmission HARQ processes; or, belong to the same HARQ over-presentation.

14. The method according to claim 13, wherein the process of sending the response information is specifically: When the multiple data units belong to different HARQ processes, the response information is sorted according to the order of the HARQ process numbers, and the sorted response information is sent to the sending end;

When the multiple data units belong to the same HARQ process, the response information is sorted according to the order of the physical resources occupied by each data unit, and the sorted response information is sent to the sending end.

The method according to claim 1, wherein the method for the receiving end to send the response information to the transmitting end comprises:

Sending a response message to the sender in a code division manner; or

发送 Send a response message to the sender in a frequency division manner; or,

The receiving end sends a response message carrying the corresponding process number to the sending end.

16. The method of claim 1 wherein:

The receiving end sends the response information of each data unit to the sending end in the response channel; or, the response information of the multiple data units is carried in the same answering channel and sent to the sending end.

A hybrid automatic repeat transmission device, comprising: a data sending module and a data feedback result processing module;

The device according to claim 17, wherein the data sending module comprises:

a first sending data determining module, configured at a higher layer, configured to split the data transmitted by the upper layer into a plurality of data blocks and send the data to the physical layer;

The first sending module is disposed at the physical layer, and is configured to encapsulate the plurality of data blocks into data units respectively; and in the same time transmission unit, send the encapsulated data unit to the receiving end.

The device according to claim 17, wherein the data sending module comprises: a determining module, a second sending data determining module, and a first sending module,

The determining module is configured to determine, according to a certain scheduling algorithm, whether the data transmitted by the upper layer needs to be split into multiple data blocks according to current channel conditions and service characteristics;

The second sending data determining module is configured to split the data transmitted by the upper layer into a plurality of data blocks and then send the data to the physical layer when the determining module determines that the splitting is required;

a first sending module, configured in the physical layer, configured to encapsulate the plurality of data blocks into data units respectively; In a time transmission unit, the encapsulated data unit is sent to the receiving end.

The device according to claim 17, wherein the data sending module comprises: a cutting module, and a second sending module;

a cutting module, configured to cut the data blocks submitted by the high-level into a plurality of sub-blocks; the second sending module is disposed at the physical layer, and is configured to encapsulate the plurality of sub-blocks generated by the cutting module into data Unit; sends the encapsulated data unit to the receiving end within the same time transmission unit.

A hybrid automatic retransmission receiving device, comprising: a data receiving module, a response module, and a sorting storage module;

The data receiving module is disposed at a physical layer, configured to receive a data unit, perform merging, demodulating, decoding, and receiving each of the received data units, and send the verification result to the response module;

The sorting storage module is disposed at a physical layer for sorting data units received by the data receiving module.

The device according to claim 21, wherein, when the received data unit is a sub-data block after the physical layer is cut by the transmitting end, the device further includes:

The data reporting module is configured at the physical layer, and is configured to form all the total data data blocks into a total data when the number of retransmissions of all sub-blocks transmitted correctly or the wrong sub-data unit reaches a predetermined maximum number of retransmissions. After the block or reordering, a total data block is formed and sent to the upper layer of the receiving end.

A hybrid automatic retransmission system, comprising: a transmitting device and a receiving device; wherein the transmitting device is provided with: a data sending module and a data feedback result processing module;

The data feedback result processing module is configured to receive response information of the data unit, and perform data retransmission on the erroneous data unit that does not reach the maximum number of retransmissions according to the response information;

The receiving device includes: a data receiving module, a response module, and a sorting storage module;