CN113328832A

CN113328832A - Data transmission method, device and system

Info

Publication number: CN113328832A
Application number: CN202110160872.4A
Authority: CN
Inventors: 谭源春; 李俊强; 纪江峰; 蔡晓
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-08-31
Anticipated expiration: 2041-02-05
Also published as: CN113328832B

Abstract

The embodiment of the application provides a data transmission method, a device and a system, comprising the following steps: when determining that the exiting TRP exists, sending exiting indication information to the exiting TRP; enabling the quit TRP to send HARQ retransmission data to the joining TRP; therefore, the franchised TRP directly receives the HARQ retransmission data sent by the quitting TRP, the IP data of the quitting TRP does not need to be coded, and the HARQ retransmission data is directly sent through the HARQ sending entity corresponding to the franchised TRP, so that the terminal can acquire the HARQ retransmission data of the quitting TRP, the transmission delay of the HARQ retransmission data of the quitting TRP is reduced, and the acquisition efficiency of the HARQ retransmission data of the quitting TRP is improved. In addition, the HARQ transmitting entity corresponding to the franchised TRP transmits the HARQ retransmission data for exiting the TRP, so that the reliability of the transmission of the HARQ retransmission data for exiting the TRP can be improved.

Description

Data transmission method, device and system

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, and system.

Background

Low latency and high reliability are important requirements for the fifth generation mobile communication technology (5G) and the subsequent evolution standards. In order to ensure high reliability of Transmission, in 5G, a Multi-Transmission/reception Point (Multi-TRP) cooperative Transmission technique may be employed. Meanwhile, due to the robustness of a conventional Hybrid Automatic Repeat Request (HARQ) technology or an Automatic Repeat Request (ARQ) technology, the HARQ technology or the ARQ technology improves the high reliability of data transmission.

For example, when the position of a terminal changes, the TRP set corresponding to the terminal is also dynamically adjusted, and one or more TRPs exit the TRP set corresponding to the terminal, so as to obtain a new TRP set corresponding to the terminal. For an exiting TRP, data which is not transmitted and/or unsuccessfully transmitted needs to be forwarded to a TRP selected from the new TRP set so as to continue to transmit the data which is not transmitted and/or unsuccessfully transmitted by the exiting TRP through the TRP, thereby improving the reliability of data transmission.

However, when the number of users who quit the TRP and/or unsuccessfully transmitted TRP is forwarded to a TRP in the new TRP set, the TRP is forwarded based on Internet Protocol (IP) layer, that is: the quitted TRP forwards the IP layer data which is not transmitted and/or is not successfully transmitted to a certain TRP in the new TRP set; correspondingly, the terminal can remove the buffered HARQ data sent by the exited TRP and acquire the HARQ retransmission data sent by the exited TRP from the selected TRP again, so that the transmission delay of the HARQ retransmission data is large, and the acquisition efficiency of the HARQ retransmission data is low.

Disclosure of Invention

The embodiment of the invention provides a data transmission method, a device and a system, which can reduce the transmission time delay of HARQ retransmission data when the HARQ retransmission data is transmitted, thereby improving the acquisition efficiency of the HARQ retransmission data.

In a first aspect, an embodiment of the present application provides a data transmission method, where the data transmission method may include:

when determining that an exiting TRP exists in a sending and receiving node TRP set pre-configured for a terminal, determining a joining TRP of data to be transmitted for sending the exiting TRP in a target TRP set; wherein the franchised TRP does not belong to the pre-configured TRP set, the target TRP set does not include the quit TRP, and the data to be transmitted includes hybrid automatic repeat request (HARQ) retransmission data.

Sending exit indication information to the exit TRP; wherein the exit indication information is used for indicating the exit TRP to send the HARQ retransmission data to the joining TRP.

Transmitting transmission indication information to the joining TRP; wherein the transmission indication information is used for indicating the HARQ sending entity corresponding to the franchised TRP to send the HARQ retransmission data.

Sending configuration information to a terminal; wherein the configuration information is used for instructing the terminal to receive the HARQ retransmission data from the HARQ transmission entity corresponding to the franchised TRP.

In one possible implementation, the method further includes:

establishing a mapping relation between the withdrawal TRP and the joining TRP based on the identification of the withdrawal TRP and the identification of the joining TRP, wherein the mapping relation is the transmission indication information.

In one possible implementation manner, the determining, in a target TRP set, an affiliate TRP for transmitting data to be transmitted of the exit TRP includes:

comparing the target set of TRPs with the preconfigured set of TRPs, determining TRPs in the target set of TRPs that do not belong to the preconfigured set of TRPs.

Determining the TRP that does not belong to the preconfigured set of TRPs as the enrolled TRP.

In one possible implementation, the method further includes:

determining, among the preconfigured set of TRPs, TRPs that do not belong to the target set of TRPs; determining the TRP not belonging to the target TRP set as the exit TRP.

In one possible implementation, the method further includes:

receiving channel quality measurement results of a plurality of TRPs to be measured sent by the terminal; wherein all TRPs and at least one other TRP of the pre-configured set of TRPs are comprised in the plurality of TRPs to be measured.

Determining TRPs with channel quality larger than a preset threshold value in the plurality of TRPs to be measured according to the channel quality measurement results of the plurality of TRPs to be measured, wherein the TRPs with the channel quality larger than the preset threshold value form the target TRP set.

In one possible implementation, the method further includes:

and judging whether the target TRP set comprises a main TRP or not.

And if the main TRP is included and the channel quality of the main TRP is greater than a first threshold value, continuously determining the main TRP as a new main TRP.

In one possible implementation, the method further includes:

and if the main TRP is not included, determining the TRP with the best channel quality in the target TRP set.

Sending a change request message to the TRP with the best channel quality; wherein the change request message is used to indicate the TRP with the best channel quality as the new primary TRP.

In a second aspect, an embodiment of the present application further provides a data transmission method, where the data transmission method may include:

receiving transmission indication information sent by a main sending and receiving node TRP; the transmission indication information is used for indicating the joining TRP in the target TRP set to send data to be transmitted which quits the TRP; the joining TRP is determined when the exiting TRP exists in a TRP set pre-configured for a terminal, the joining TRP does not belong to the pre-configured TRP set, the exiting TRP is not included in the target TRP set, and the data to be transmitted comprises hybrid automatic repeat request (HARQ) retransmission data.

And receiving the HARQ retransmission data sent by the exiting TRP.

And sending the HARQ retransmission data to the terminal through the HARQ sending entity corresponding to the joined TRP.

In one possible implementation manner, the transmitting the HARQ retransmission data to the terminal through the HARQ transmitting entity corresponding to the franchised TRP includes:

and analyzing the HARQ retransmission data to obtain packet header information and target HARQ process data corresponding to the quit TRP.

And based on the packet header information, transmitting the target HARQ process data to the terminal through the HARQ transmitting entity corresponding to the franchised TRP.

In a possible implementation manner, the packet header information includes an identifier of a transmission HARQ process used when the target HARQ process data is transmitted by the quit TRP, and the transmitting the target HARQ process data to the terminal through the HARQ transmitting entity corresponding to the franchised TRP based on the packet header information includes:

and in the HARQ sending entity corresponding to the joining TRP, determining a target sending HARQ process which is the same as the identification of the sending HARQ process used when the quitting TRP sends the target HARQ process data.

Transmitting the target HARQ process data to the terminal through the target HARQ process; wherein the target transmission HARQ process can be used for transmitting the HARQ process data of the franchised TRP.

In a possible implementation manner, the target transmission HARQ process transmits the target HARQ process data according to a physical downlink control channel of the franchised TRP.

In one possible implementation, the method further includes:

and updating the transmission times of the target HARQ process data according to the transmission times of the joining TRP and the transmission times of the quitting TRP included in the packet header information.

In one possible implementation, the method further includes:

and receiving a first message that the target transmission HARQ process is successful and sent by the terminal.

And releasing buffer data corresponding to the target transmission HARQ process according to the first message, and transmitting the HARQ process data of the franchised TRP through the target transmission HARQ process.

In one possible implementation, the method further includes:

and receiving a second message which is sent by the terminal and used for the target sending HARQ process failure.

And if the transmission times of the target HARQ process data are determined to be less than the maximum transmission times based on the second message, sending the target HARQ process data to the terminal through the target sending HARQ process again until the transmission times of the target HARQ process data are greater than or equal to the maximum transmission times.

And if the transmission times of the target HARQ process data are determined to be larger than or equal to the maximum transmission times based on the second message, releasing the buffer area data corresponding to the target sending HARQ process, and sending the HARQ process data of the joining TRP through the target sending HARQ process.

In a possible implementation manner, the data to be transmitted includes data to be transmitted in a high layer, and the method further includes:

and sending the high-layer data to be sent and the high-layer data to be sent of the joining TRP to the terminal together through the HARQ sending entity corresponding to the joining TRP.

In one possible implementation, the method further includes:

and in the HARQ transmission entity corresponding to the joining TRP, transmitting the HARQ process data of the joining TRP to the terminal through other transmission HARQ processes except the target transmission HARQ process.

In a third aspect, an embodiment of the present application further provides a data transmission method, where the data transmission method may include:

and receiving the configuration information sent by the main transmitting and receiving node TRP.

Determining an exiting TRP in a TRP set pre-configured for a terminal according to the configuration information, and determining a joining TRP for sending data to be transmitted of the exiting TRP in a target TRP set; wherein the franchised TRP does not belong to the pre-configured TRP set, the target TRP set does not include the quit TRP, and the data to be transmitted includes hybrid automatic repeat request (HARQ) retransmission data.

Determining a HARQ receiving entity corresponding to the exiting TRP in the terminal; and the HARQ receiving entity corresponding to the TRP quitting can be used for receiving the HARQ process data of the joining TRP.

And receiving the HARQ retransmission data sent by the HARQ sending entity corresponding to the joining TRP through the HARQ receiving entity corresponding to the withdrawing TRP.

In one possible implementation, the method further includes:

and stopping sending response information to the exiting TRP, and storing the data which is sent by the HARQ sending entity corresponding to the exiting TRP.

In a possible implementation manner, the HARQ receiving entity corresponding to the TRP quit receives the HARQ retransmission data according to the physical downlink control channel of the TRP franchised.

In a possible implementation manner, the determining, in the terminal, a HARQ receiving entity corresponding to the TRP exit includes:

and receiving the physical downlink control channel of the joining TRP sent by the HARQ sending entity corresponding to the joining TRP.

And determining the HARQ receiving entity corresponding to the withdrawal TRP in the terminal according to the physical downlink control channel of the joining TRP.

In a possible implementation manner, the physical downlink control channel of the franchised TRP includes an identifier of a transmission HARQ process used when the quit TRP transmits target HARQ process data, and the target HARQ process data is obtained by analyzing the HARQ retransmission data.

The receiving, by the HARQ receiving entity corresponding to the drop TRP, the HARQ retransmission data sent by the HARQ sending entity corresponding to the franchised TRP includes:

and in the HARQ receiving entity corresponding to the withdrawing TRP, determining a target receiving HARQ process which is the same as the identification of the transmitting HARQ process used when the withdrawing TRP transmits the target HARQ process data.

And receiving the target HARQ process data sent by the HARQ sending entity corresponding to the franchised TRP through the target receiving HARQ process.

In one possible implementation, the method further includes:

and determining other receiving HARQ processes except the target receiving HARQ process in the HARQ receiving entity corresponding to the franchised TRP.

And receiving the HARQ process data of the franchised TRP through the other receiving HARQ processes.

In one possible implementation, the method further includes:

if the target HARQ process data is retransmission data, caching the target HARQ process data into a cache region corresponding to the target receiving HARQ process; and if the target HARQ process data is newly transmitted data, clearing the cache region data corresponding to the target receiving HARQ process, and caching the target HARQ process data into the cache region corresponding to the target receiving HARQ process.

And carrying out decoding processing on the buffer corresponding to the target receiving HARQ process.

And sending response information to the terminal according to the decoding processing result.

In a possible implementation manner, the sending response information to the terminal according to the decoding processing result includes:

and if the decoding processing result indicates that the decoding is correct, sending a first message that the target sending HARQ process is successful to the joining TRP.

And releasing buffer data corresponding to the target receiving HARQ process according to the first message, and receiving the HARQ process data of the joining TRP through the target receiving HARQ process.

In one possible implementation, the method further includes:

and if the decoding processing result indicates decoding error, sending a second message of the target HARQ process failure to the joining TRP.

And if the transmission times of the target HARQ process data are determined to be less than the maximum transmission times based on the second message, receiving the target HARQ process data through the target receiving HARQ process again until the transmission times of the target HARQ process data are greater than or equal to the maximum transmission times.

And if the transmission times of the target HARQ process data are determined to be larger than or equal to the maximum transmission times based on the second message, releasing the buffer area data corresponding to the target receiving HARQ process, and receiving the HARQ process data of the joining TRP through the target sending HARQ process.

In one possible implementation, the method further includes:

and receiving the identifications of the plurality of TRPs to be detected sent by the main TRP.

Measuring the channel quality of the TRPs to be measured according to the identifiers of the TRPs to be measured to obtain parameter information of the TRPs to be measured; wherein all TRPs of the pre-configured set of TRPs are included in the plurality of TRPs to be measured.

Transmitting parameter information of the plurality of TRPs to be measured to the master TRP; wherein the parameter information of the plurality of TRPs to be measured is used for the main TRP to determine the target TRP set according to the parameter information.

In a fourth aspect, an embodiment of the present application further provides a data transmission method, where the data transmission method may include:

receiving exit indication information sent by a main sending and receiving node TRP; the exit indication information is used for indicating the exit TRP to send hybrid automatic repeat request (HARQ) retransmission data of the exit TRP to an affiliate TRP.

And according to the quit indication information, the HARQ retransmission data is sent to a joining TRP through the HARQ sending entity corresponding to the quit TRP, the HARQ retransmission data is stopped being sent to a terminal, and the HARQ retransmission data is sent to the terminal through the HARQ sending entity corresponding to the joining TRP.

In a fifth aspect, an embodiment of the present application further provides a data transmission apparatus, where the data transmission apparatus may include:

the processing unit is used for determining a joining TRP of data to be transmitted for sending the withdrawing TRP in a target TRP set when the withdrawing TRP exists in a sending and receiving node TRP set pre-configured for a terminal; wherein the franchised TRP does not belong to the pre-configured TRP set, the target TRP set does not include the quit TRP, and the data to be transmitted includes hybrid automatic repeat request (HARQ) retransmission data.

A sending unit, configured to send exit indication information to the exit TRP; wherein the exit indication information is used for indicating the exit TRP to send the HARQ retransmission data to the joining TRP.

The sending unit is further used for sending transmission indication information to the joining TRP; wherein the transmission indication information is used for indicating the HARQ sending entity corresponding to the franchised TRP to send the HARQ retransmission data.

The sending unit is further configured to send configuration information to the terminal; wherein the configuration information is used for instructing the terminal to receive the HARQ retransmission data from the HARQ transmission entity corresponding to the franchised TRP.

In a possible implementation manner, the processing unit is further configured to establish a mapping relationship between the exit TRP and the affiliate TRP based on the identifier of the exit TRP and the identifier of the affiliate TRP, where the mapping relationship is the transmission indication information.

In a possible implementation, the processing unit is further configured to compare the target set of TRPs with the preconfigured set of TRPs, determine TRPs in the target set of TRPs that do not belong to the preconfigured set of TRPs; and determining the TRP not belonging to the preconfigured set of TRPs as the enrolled TRP.

In a possible implementation manner, the processing unit is further configured to determine, among the preconfigured set of TRPs, a TRP that does not belong to the target set of TRPs; and determining the TRP not belonging to the target TRP set as the exit TRP.

In one possible implementation, the apparatus further includes a receiving unit.

The receiving unit is used for receiving channel quality measurement results of a plurality of TRPs to be measured sent by the terminal; wherein all TRPs and at least one other TRP of the pre-configured set of TRPs are comprised in the plurality of TRPs to be measured.

The processing unit is further configured to determine, according to the channel quality measurement results of the multiple TRPs to be measured, a TRP of which channel quality is greater than a preset threshold value among the multiple TRPs to be measured, where the TRP of which channel quality is greater than the preset threshold value constitutes the target TRP set.

In a possible implementation manner, the processing unit is further configured to determine whether a master TRP is included in the target TRP set; and if the main TRP is included and the channel quality of the main TRP is greater than a first threshold value, continuously determining the main TRP as a new main TRP.

In a possible implementation manner, the processing unit is further configured to determine a TRP with the best channel quality in the target TRP set if the primary TRP is not included.

The sending unit is further configured to send a change request message to the TRP with the best channel quality; wherein the change request message is used to indicate the TRP with the best channel quality as the new primary TRP.

In a sixth aspect, an embodiment of the present application further provides a data transmission apparatus, where the data transmission apparatus may include:

the receiving unit is used for receiving the transmission indication information sent by the main sending and receiving node TRP; the transmission indication information is used for indicating the joining TRP in the target TRP set to send data to be transmitted which quits the TRP; the joining TRP is determined when the exiting TRP exists in a TRP set pre-configured for a terminal, the joining TRP does not belong to the pre-configured TRP set, the exiting TRP is not included in the target TRP set, and the data to be transmitted comprises hybrid automatic repeat request (HARQ) retransmission data.

The receiving unit is further configured to receive the HARQ retransmission data sent by the exiting TRP.

And a sending unit, configured to send the HARQ retransmission data to the terminal through an HARQ sending entity corresponding to the imposed TRP.

In one possible implementation, the apparatus further includes a processing unit.

And the processing unit is used for analyzing the HARQ retransmission data to obtain packet header information and target HARQ process data corresponding to the quit TRP.

The sending unit is specifically configured to send the target HARQ process data to the terminal through the HARQ sending entity corresponding to the franchised TRP based on the packet header information.

In a possible implementation manner, the packet header information includes an identifier of a transmission HARQ process used when the quit TRP transmits the target HARQ process data.

The processing unit is further configured to determine, in the HARQ transmitting entity corresponding to the joining TRP, a target transmission HARQ process that is the same as the HARQ process identifier used by the quit TRP to transmit the target HARQ process data.

The sending unit is specifically configured to send the target HARQ process data to the terminal through the target transmission HARQ process; wherein the target transmission HARQ process can be used for transmitting the HARQ process data of the franchised TRP.

In a possible implementation manner, the processing unit is further configured to update the transmission number of the target HARQ process data according to the transmission number of the franchised TRP and the transmission number of the exited TRP included in the packet header information.

In a possible implementation manner, the receiving unit is further configured to receive a first message that the target transmission HARQ process is successful, where the first message is sent by the terminal.

The processing unit is further configured to release, according to the first message, buffer data corresponding to the target transmission HARQ process.

The sending unit is further configured to send HARQ process data of the franchised TRP through the target sending HARQ process.

In a possible implementation manner, the receiving unit is further configured to receive a second message that a target transmission HARQ process fails and is sent by the terminal.

The sending unit is further configured to send the target HARQ process data to the terminal through the target transmission HARQ process again if it is determined that the number of transmission times of the target HARQ process data is smaller than the maximum number of transmission times based on the second message, until the number of transmission times of the target HARQ process data is greater than or equal to the maximum number of transmission times.

The processing unit is further configured to release the buffer data corresponding to the target transmission HARQ process if it is determined, based on the second message, that the number of transmission times of the target HARQ process data is greater than or equal to the maximum number of transmission times.

In a possible implementation manner, the data to be transmitted includes data to be transmitted in a higher layer.

The sending unit is further configured to send the high-level data to be sent and the high-level data to be sent of the joining TRP to the terminal together through the HARQ sending entity corresponding to the joining TRP.

In a possible implementation manner, the transmitting unit is further configured to transmit HARQ process data of the franchised TRP to the terminal through a transmission HARQ process other than the target transmission HARQ process in the HARQ transmitting entity corresponding to the franchised TRP.

In a seventh aspect, an embodiment of the present application further provides a data transmission device, where the data transmission device may include:

and the receiving unit is used for receiving the configuration information sent by the main sending and receiving node TRP.

The processing unit is used for determining an exit TRP in a TRP set pre-configured for the terminal according to the configuration information, and determining a joining TRP for sending data to be transmitted of the exit TRP in a target TRP set; wherein the franchised TRP does not belong to the pre-configured TRP set, the target TRP set does not include the quit TRP, and the data to be transmitted includes hybrid automatic repeat request (HARQ) retransmission data.

The processing unit is further configured to determine, in the terminal, an HARQ receiving entity corresponding to the exiting TRP; and the HARQ receiving entity corresponding to the TRP quitting can be used for receiving the HARQ process data of the joining TRP.

The receiving unit is further configured to receive, through the HARQ receiving entity corresponding to the drop TRP, the HARQ retransmission data sent through the HARQ sending entity corresponding to the franchised TRP.

In a possible implementation manner, the processing unit is further configured to stop sending response information to the TRP exit, and store data that has been sent by the HARQ sending entity corresponding to the TRP exit.

In a possible implementation manner, the receiving unit is further configured to receive a physical downlink control channel of the franchised TRP sent by a HARQ sending entity corresponding to the franchised TRP;

the processing unit is specifically configured to determine, in the terminal, an HARQ receiving entity corresponding to the drop-out TRP according to the physical downlink control channel of the imposed TRP.

The processing unit is further configured to determine, in the HARQ receiving entity corresponding to the TRP, a target HARQ receiving process that is the same as the HARQ process transmitting identifier used when the TRP transmits the target HARQ process data.

The receiving unit is specifically configured to receive, through the target reception HARQ process, the target HARQ process data sent by the HARQ sending entity corresponding to the franchised TRP.

In a possible implementation manner, the processing unit is further configured to determine, in the HARQ receiving entity corresponding to the franchised TRP, other receiving HARQ processes except for the target receiving HARQ process.

The receiving unit is further configured to receive HARQ process data of the imposed TRP through the other received HARQ processes.

In one possible implementation, the apparatus further includes a sending unit.

The processing unit is further configured to cache the target HARQ process data in a cache region corresponding to the target reception HARQ process if the target HARQ process data is retransmission data; and if the target HARQ process data is newly transmitted data, clearing the cache region data corresponding to the target receiving HARQ process, and caching the target HARQ process data into the cache region corresponding to the target receiving HARQ process.

The processing unit is further configured to perform decoding processing on the buffer corresponding to the target receiving HARQ process.

And the sending unit is also used for sending response information to the terminal according to the decoding processing result.

In a possible implementation manner, the sending unit is specifically configured to send, to the joining TRP, a first message that the target HARQ process is successfully sent if the decoding processing result indicates that decoding is correct.

The processing unit is further configured to release, according to the first message, buffer data corresponding to the target receiving HARQ process.

The receiving unit is further configured to receive HARQ process data of the franchised TRP through the target reception HARQ process.

In a possible implementation manner, the sending unit is specifically configured to send, to the joining TRP, a second message indicating that the target transmission HARQ process fails, if the decoding processing result indicates a decoding error.

The receiving unit is further configured to receive the target HARQ process data through the target reception HARQ process again until the transmission number of the target HARQ process data is greater than or equal to the maximum transmission number if it is determined that the transmission number of the target HARQ process data is less than the maximum transmission number based on the second message.

The processing unit is further configured to release the buffer data corresponding to the target HARQ process if it is determined, based on the second message, that the number of transmission times of the target HARQ process data is greater than or equal to the maximum number of transmission times.

The receiving unit is further configured to receive HARQ process data of the joining TRP through the target transmission HARQ process.

In a possible implementation manner, the receiving unit is further configured to receive identifiers of a plurality of TRPs to be detected, where the identifiers are sent by the master TRP.

The processing unit is further configured to measure the channel quality of the multiple TRPs to be measured according to the identifiers of the multiple TRPs to be measured, so as to obtain parameter information of the multiple TRPs to be measured; wherein all TRPs of the pre-configured set of TRPs are included in the plurality of TRPs to be measured.

The sending unit is further configured to send parameter information of the plurality of TRPs to be measured to the master TRP; wherein the parameter information of the plurality of TRPs to be measured is used for the main TRP to determine the target TRP set according to the parameter information.

In an eighth aspect, an embodiment of the present application further provides a data transmission apparatus, where the data transmission apparatus may include:

the receiving unit is used for receiving quitting indication information sent by a main sending and receiving node TRP; the exit indication information is used for indicating the exit TRP to send hybrid automatic repeat request (HARQ) retransmission data of the exit TRP to an affiliate TRP.

And the sending unit is used for sending the HARQ retransmission data to the joining TRP through the HARQ sending entity corresponding to the joining TRP according to the exiting indication information, stopping sending the HARQ retransmission data to the terminal and sending the HARQ retransmission data to the terminal through the HARQ sending entity corresponding to the joining TRP.

In this embodiment, the data transmission device may be, for example, a chip or a chip module, and each module in the data transmission device may include the software module and/or a hardware module such as the chip or the chip module described above.

In a ninth aspect, an embodiment of the present application further provides a master transmitting and receiving node TRP, including a processor and a memory; wherein,

the memory for storing a computer program;

the processor is configured to read the computer program stored in the memory, and execute the data transmission method in any one of the possible implementation manners of the first aspect according to the computer program in the memory.

In a tenth aspect, an embodiment of the present application further provides an alliance transmit-receive node TRP, including a processor and a memory; wherein,

the memory for storing a computer program;

the processor is configured to read the computer program stored in the memory, and execute the data transmission method in any one of the possible implementation manners of the second aspect according to the computer program in the memory.

In an eleventh aspect, embodiments of the present application further provide a terminal, including a processor and a memory; wherein,

the memory for storing a computer program;

the processor is configured to read the computer program stored in the memory, and execute the data transmission method in any one of the possible implementation manners of the third aspect according to the computer program in the memory.

In a twelfth aspect, an embodiment of the present application further provides a quitting sending and receiving node TRP, including a processor and a memory; wherein,

the memory for storing a computer program;

the processor is configured to read the computer program stored in the memory, and execute the data transmission method according to the fourth aspect according to the computer program in the memory.

In a thirteenth aspect, an embodiment of the present invention further provides a computer-readable storage medium, where a computer-executable instruction is stored in the computer-readable storage medium, and when a processor executes the computer-executable instruction, the data transmission method described in any one of the foregoing possible implementation manners of the first aspect, or the data transmission method described in any one of the foregoing possible implementation manners of the second aspect, or the data transmission method described in any one of the foregoing possible implementation manners of the third aspect, or the data transmission method described in the foregoing fourth aspect is implemented.

In a fourteenth aspect, an embodiment of the present application further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the computer program implements the data transmission method described in any one of the foregoing possible implementation manners of the first aspect, or the data transmission method described in any one of the foregoing possible implementation manners of the second aspect, or the data transmission method described in any one of the foregoing possible implementation manners of the third aspect, or the data transmission method described in the foregoing fourth aspect.

In a fifteenth aspect, an embodiment of the present application further provides a data transmission system, where the data transmission system may include:

a master transceiver node TRP according to the ninth aspect, a franchised transceiver node TRP according to the tenth aspect, a terminal according to the eleventh aspect, and a quit transceiver node TRP according to the twelfth aspect.

The data transmission method, device and system provided by the embodiment of the application comprise the following steps: when determining that the exiting TRP exists, sending exiting indication information to the exiting TRP; enabling the quit TRP to send HARQ retransmission data to the joining TRP; therefore, the franchised TRP directly receives the HARQ retransmission data sent by the quitting TRP, the IP data of the quitting TRP does not need to be coded, and the HARQ retransmission data is directly sent through the HARQ sending entity corresponding to the franchised TRP, so that the terminal can acquire the HARQ retransmission data of the quitting TRP, the transmission delay of the HARQ retransmission data of the quitting TRP is reduced, and the acquisition efficiency of the HARQ retransmission data of the quitting TRP is improved. In addition, the HARQ transmitting entity corresponding to the franchised TRP transmits the HARQ retransmission data for exiting the TRP, so that the reliability of the transmission of the HARQ retransmission data for exiting the TRP can be improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram of an application scenario provided in an embodiment of the present application;

fig. 2 is a schematic diagram of data transmission according to an embodiment of the present application;

fig. 3 is a schematic flowchart of a data transmission method according to an embodiment of the present application;

fig. 4 is a schematic diagram of another data transmission provided in the embodiments of the present application;

FIG. 5 is a schematic diagram of yet another data transmission provided by an embodiment of the present application;

fig. 6 is a schematic structural diagram of a data transmission device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a primary transmitting and receiving node TRP according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of an affiliate sending and receiving node TRP according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a quitting transmitting and receiving node TRP according to an embodiment of the present application.

With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

In the embodiments of the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In the description of the present invention, the character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The technical scheme provided by the embodiment of the application can be applied to a Multi-Transmission/reception node (Multi-TRP) cooperative Transmission scene. In a multi-point TRP cooperative transmission scenario, a network configures a terminal with a corresponding TRP set, where the TRP set may include multiple TRPs for the terminal to transmit data. Referring to fig. 1, fig. 1 is a schematic diagram of an application scenario provided by an embodiment of the present application, and it is assumed that a network configures a terminal with a TRP set { TRP #0, …, TRP # i, …, TRP # N-1}, which includes N TRPs for the terminal to transmit data. Each TRP corresponds to a respective HARQ transmission entity, assuming that the HARQ transmission entity corresponding to TRP #0 is HARQ transmission entity #0, …, the HARQ transmission entity corresponding to TRP # i is HARQ transmission entity # i, …, the HARQ transmission entity corresponding to TRP # N-1 is HARQ transmission entity # N-1, and each TRP can transmit HARQ data to be transmitted to the terminal through its HARQ transmission entity; correspondingly, the terminal may also be configured with HARQ receiving entities corresponding to the HARQ transmitting entities, where the HARQ receiving entities include HARQ receiving entities #0 and … corresponding to HARQ transmitting entity #0, HARQ receiving entities # i and … corresponding to HARQ transmitting entity # i, and HARQ receiving entity # N-1 corresponding to HARQ transmitting entity # N-1, which may be respectively recorded as: rx #0, …, Rx # i, …, Rx # N-1; and receives the HARQ data transmitted by the HARQ transmitting entity #0 through Rx #0, …, Rx # i receives the HARQ data transmitted by the HARQ transmitting entity # i, …, Rx # N-1 receives the HARQ data transmitted by the HARQ transmitting entity # N-1, thereby completing the transmission of the HARQ data.

It can be understood that, when the network transmits data to the terminal through N TRPs in the TRP set configured for the terminal, in addition to the above case, another case is included: dividing the N TRPs into M subsets, wherein M is more than or equal to 1 and less than or equal to N, and each subset is jointly transmitted with a terminal; the terminal generates M HARQ receiving entities, and respectively receives the M subsets of data.

When the position of a terminal changes, the TRP set corresponding to the terminal is also dynamically adjusted, and one or more TRPs exist to quit the TRP set corresponding to the terminal, and in combination with the description of fig. 1, if there is a certain TRP # i in the TRP set configured for the terminal that no longer transmits data to the terminal, the TRP # i may be recorded as a quit TRP # i, and the quit TRP # i forwards IP layer data that is not transmitted and/or not successfully transmitted to other TRPs and is recorded as an imposed TRP # N, so that HARQ retransmission data that quits the TRP # i is transmitted to the terminal through the imposed TRP # N. Correspondingly, the terminal clears the buffered HARQ data exiting TRP # i and acquires the HARQ retransmission data exiting TRP # i from the franchised TRP # N again.

However, when the terminal acquires the HARQ retransmission data exiting the TRP # i from the TRP # N again, since the TRP # N only receives the IP layer data transmitted by the TRP # i and not transmitted and/or not successfully transmitted, the TRP # N needs to encode the IP layer data transmitted by the TRP # i and not transmitted and/or not successfully transmitted to acquire the HARQ retransmission data exiting the TRP # i, and needs to construct a HARQ transmitting entity for transmitting the HARQ retransmission data in the TRP # N and a HARQ receiving entity for receiving the HARQ retransmission data in the terminal, so that the transmission delay of the HARQ retransmission data exiting the TRP # i is large, and the acquisition efficiency of the HARQ retransmission data exiting the TRP # i is low.

In order to reduce the transmission delay of the HARQ retransmission data exiting the TRP # i and thus improve the acquisition efficiency of the HARQ retransmission data exiting the TRP # i, when the HARQ retransmission data exiting the TRP # i is transmitted, it may be assumed that a certain TRP exiting # i does not send data to the terminal any more in the TRP set configured for the terminal, and the master TRP corresponding to the serving cell where the terminal currently resides may select a franchise TRP # N for sending the to-be-transmitted data exiting the TRP # i, and send the HARQ retransmission data exiting the TRP # i to the terminal through the HARQ sending entity corresponding to the franchise TRP # N. Referring to fig. 2, fig. 2 is a schematic diagram of data transmission provided in an embodiment of the present application, where after a master TRP determines a joining TRP # N, the master TRP may send withdrawal indication information to a withdrawal TRP # i, so that the withdrawal TRP # i directly sends HARQ retransmission data to the joining TRP # N; and transmitting transmission indication information to the joining TRP # N so that the joining TRP # N transmits HARQ retransmission data through a corresponding HARQ transmission entity # N; and then transmitting the configuration information to the terminal, so that the terminal receives the HARQ retransmission data exiting the TRP # i transmitted by the HARQ transmitting entity # N through the HARQ receiving entity # i. Therefore, the franchised TRP # N directly receives the HARQ retransmission data exiting the TRP # i, does not need to code the IP data exiting the TRP # i, and directly sends the HARQ retransmission data exiting the TRP # i to the terminal through the HARQ sending entity # N, so that the terminal can acquire the HARQ retransmission data exiting the TRP # i, the transmission delay of the HARQ retransmission data exiting the TRP # i is reduced, and the acquisition efficiency of the HARQ retransmission data exiting the TRP # i is improved.

Based on the above concept, the embodiments of the present application provide a data transmission method, which can be applied to a multi-point TRP cooperative transmission system, where the multi-point TRP cooperative transmission system may include a master TRP, an exit TRP, an affiliate TRP, and a terminal. The primary TRP may be understood as a TRP corresponding to a serving cell where the terminal currently resides. The main TRP is mainly used for determining an alliance TRP for sending data to be transmitted of the exiting TRP in a target TRP set when the exiting TRP exists in a TRP set pre-configured for a terminal; sending quitting indication information to a quitting TRP to indicate the quitting TRP to send HARQ retransmission data included in the data to be transmitted to the joining TRP; transmitting transmission indication information to the joining TRP so that the joining TRP transmits HARQ retransmission data through a HARQ transmitting entity corresponding to the joining TRP; then sending configuration information to the terminal; correspondingly, after receiving the configuration information, the terminal determines an HARQ receiving entity corresponding to the TRP quitting in the terminal, wherein the HARQ receiving entity corresponding to the TRP quitting can be used for receiving HARQ process data of the joining TRP; and receiving HARQ retransmission data sent by the HARQ sending entity corresponding to the joined TRP by exiting the HARQ receiving entity corresponding to the TRP.

Wherein the franchised TRP does not belong to the preconfigured TRP set, and the target TRP set does not include the exit TRP. It should be noted that, when the franchised TRP is used to send data to be transmitted that exits the TRP, the HARQ data that the franchised TRP needs to send by the HARQ sending entity corresponding to the franchised TRP includes two parts, wherein one part of the HARQ data is HARQ retransmission data included in the data to be transmitted that exits the TRP, and one part of the data is HARQ process data of the franchised TRP itself. In the embodiment of the present application, "HARQ retransmission data" described refers to only HARQ retransmission data for which TRP is exited, and "HARQ process data for which TRP is franchised" refers to only HARQ process data for which TRP itself is franchised.

It can be seen that, in the embodiment of the application, when it is determined that the exit TRP exists in the TRP set configured for the terminal, the main TRP sends exit indication information to the exit TRP, so that the exit TRP directly sends HARQ retransmission data to the franchised TRP; transmitting transmission indication information to the joining TRP so that the joining TRP transmits HARQ retransmission data through a HARQ transmitting entity corresponding to the joining TRP; and sending configuration information to the terminal so that the terminal receives HARQ retransmission data by exiting the HARQ receiving entity corresponding to the TRP. Therefore, the franchised TRP directly receives the HARQ retransmission data sent by the quitting TRP, the IP data of the quitting TRP does not need to be coded, and the HARQ retransmission data is directly sent through the HARQ sending entity corresponding to the franchised TRP, so that the terminal can acquire the HARQ retransmission data of the quitting TRP, the transmission delay of the HARQ retransmission data of the quitting TRP is reduced, and the acquisition efficiency of the HARQ retransmission data of the quitting TRP is improved. In addition, the HARQ transmission entity # N corresponding to the franchised TRP transmits the HARQ retransmission data exiting the TRP, so that the reliability of the transmission of the HARQ retransmission data exiting the TRP can be improved.

A terminal, also called a terminal device or a user device, is a device for providing voice and/or data connectivity to a user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, and so on. Common terminal devices include, for example: cell-phone, panel computer, notebook computer, palm computer, Mobile Internet Device (MID), wearable equipment, wherein, wearable equipment includes for example: smart watches, smart bracelets, pedometers, and the like.

A TRP, also known as a base station device, is a device that provides voice and/or data connectivity to a terminal. Common base station devices include, for example: macro base stations, micro base stations, vehicle-mounted base stations, and the like.

It should be noted that the data transmission method provided in the embodiment of the present application may be applied to a scenario in which an exit device exists in a TRP set preconfigured for a terminal, and the method may also be extended to the following scenario without loss of generality: the configured TRP set has a plurality of exiting TRPs, namely, only other TRPs except the plurality of exiting TRPs in the pre-configured TRP set are used for sending data to the terminal. It can be understood that when the configured TRP set has a plurality of exiting TRPs, the corresponding data transmission method is similar to that when the configured TRP set has one exiting TRP.

In the following, a detailed description will be given of the data transmission method provided in the present application, taking an example that there is one exit device in a TRP set preconfigured for a terminal. It is to be understood that the following detailed description may be combined with other embodiments, and that the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 3 is a schematic flow chart of a data transmission method according to an embodiment of the present application, for example, please refer to fig. 3, where the method for detecting an application program may include:

s301, when the main TRP determines that the exiting TRP exists in a TRP set pre-configured for the terminal, determining an affiliation TRP for sending data to be transmitted of the exiting TRP in a target TRP set.

The franchised TRP does not belong to a pre-configured TRP set, the target TRP set does not comprise the quit TRP, and the data to be transmitted comprises HARQ retransmission data.

For example, in conjunction with the related description of fig. 1, it is assumed that the master TRP pre-configures a set of TRPs for the terminal as RPSet ═ { TRP #0, …, TRP # i, …, TRP # N-1}, that is, the set of RPSet includes N TRPs for the terminal to transmit data. Each TRP corresponds to a respective HARQ transmission entity, the HARQ transmission entity corresponding to TRP #0 is HARQ transmission entity #0, …, the HARQ transmission entity corresponding to TRP # i is HARQ transmission entity # i, …, the HARQ transmission entity corresponding to TRP # N-1 is HARQ transmission entity # N-1, and each TRP can transmit HARQ data to be transmitted to the terminal through its HARQ transmission entity.

Correspondingly, the terminal is also configured with HARQ receiving entities corresponding to the HARQ transmitting entities, the HARQ receiving entities include HARQ receiving entity #0 … corresponding to HARQ transmitting entity #0, HARQ receiving entities # i and … corresponding to HARQ transmitting entity # i, and HARQ receiving entity # N-1 corresponding to HARQ transmitting entity # N-1, and receives HARQ data transmitted by HARQ transmitting entity #0 through HARQ receiving entity #0, …, HARQ receiving entity # i receives HARQ data transmitted by HARQ transmitting entity # i, …, and HARQ receiving entity # N-1 receives HARQ data transmitted by HARQ transmitting entity # N-1, thereby completing transmission of HARQ data.

If the TRP corresponding to the serving cell where the terminal currently resides is TRP # k, and k is less than or equal to N-1, the TRP # k can be determined as the main TRP. The master TRP # k may issue M TRP measurement object sets to the terminal, where { TRP #0, …, TRP # i, …, TRP # M-1}, where M is greater than or equal to N, that is, the M TRP measurement object sets include all TRPs and at least one other TRP in the preconfigured TRP set, and the at least one other TRP does not belong to the preconfigured TRP set, so that the terminal measures channel quality of the TRPs in the M TRP measurement object sets; the terminal measures the channel quality of TRPs in the M TRP measurement object sets, reports M measurement results { Meas # k, k ═ 0, …, M-1} corresponding to the M TRP measurement object sets to a main TRP # k, the main TRP # k compares the M measurement results { Meas # k, k ═ 0, …, M-1} with preset threshold values respectively, and if the measurement result Meas # i is smaller than the preset threshold value, the main TRP determines the TRP composed of TRPs corresponding to the measurement results { Meas #0, …, Meas # i-1, Meas # i +1 …, Meas # N-1} as are larger than or equal to the preset threshold values, the TRP set of TRP sets { TRP #0, …, Meas # i-1, Meas # i + …, Meas # N-1} as # N-1} as is set as target TRP set { TRP set _ new _ 0, TRP _ new _ 25, TRP _ w _ …, TRP # i +1 …, TRP # N-1, and the TRP in the TRP set _ new of the target TRP set is used for data transmission of the terminal.

The master TRP # k may compare the pre-configured TRP set TRPSet and the target TRP set TRPSet _ new when determining whether there is an exit TRP, and determine, among the pre-configured TRP sets TRPSet, a TRP that does not belong to the target TRP set TRPSet _ new, that is, a TRP that belongs to the pre-configured TRP set TRPSet but does not belong to the target TRP set TRPSet _ new, as an exit TRP. Illustratively, in the present embodiment, the TRP # i belongs to the pre-configured TRP set and does not belong to the target TRP set TRPSet _ new, and thus, the TRP # i is determined as the exit TRP of the terminal.

When determining that the exiting TRP # i exists, the master TRP # k needs to determine an affiliate TRP for transmitting data to be transmitted of the exiting TRP # i in the target TRP set TRPSet _ new. When determining the franchised TRP, the target TRP set may be compared with the preconfigured TRP set, and TRPs not belonging to the preconfigured TRP set are determined in the target TRP set; a TRP that does not belong to a preconfigured set of TRPs is determined as an affiliate TRP. For example, in the embodiment of the present application, assuming that the TRP # N belongs to the target TRP set but does not belong to a preconfigured TRP, the TRP # N is determined to be an imposed TRP and may be denoted as an imposed TRP # N.

After determining the TRP # i and the assist TRP # N, the master TRP # k may send exit instruction information to the TRP # i to instruct the TRP # i to send HARQ retransmission data thereof to the TRP # N, that is, to execute the following S302-S303; and transmits transmission instruction information to the joining TRP # N to instruct the joining TRP # N to transmit the HARQ retransmission data exiting the TRP # i to the terminal, that is, to perform the following S304-S305.

For example, the transmission indication information may be a mapping relationship between the withdrawal TRP and the affiliate TRP established based on the identity of the withdrawal TRP and the identity of the affiliate TRP. The method specifically comprises the following steps: the master TRP # k may map the identifier of the quit TRP # i and the identifier of the franchised TRP # N one by one to form HARQ transmission indication information of the terminal. If the TRP # i is not exited and/or the TRP # N is joined, the HARQ transmission indication information is empty. In the embodiment of the present application, the TRP # i is mapped to the TRP # N one to one, that is, the transmission indicator information may be represented as { TRP # i, TRP # N }, and is used to describe that HARQ retransmission data exiting TRP # i is HARQ retransmitted by the TRP # N following HARQ retransmission.

S302, the main TRP sends exit indication information to the exit TRP.

The quitting indication information is used for indicating the quitting TRP to send the HARQ retransmission data to the franchised TRP.

With reference to the description in S301, after receiving the exit instruction information transmitted by the master TRP # k, the TRP # i determines, according to the exit instruction, that the HARQ retransmission data of the TRP # i is HARQ-retransmitted subsequently by the TRP # N, so that the TRP # i stops transmitting the HARQ retransmission data to the terminal, and transmits the HARQ retransmission data to the TRP # N through the HARQ transmitting entity # i corresponding to the TRP # i, that is, S303 is executed, so that the TRP # N transmits the HARQ retransmission data of the TRP # i to the terminal through the HARQ transmitting entity # N corresponding to the TRP # i, thereby completing transmission of the HARQ retransmission data of the TRP # i.

And S303, the withdrawal TRP sends the HARQ retransmission data to the joining TRP through the HARQ sending entity corresponding to the withdrawal TRP according to the withdrawal indication information.

Wherein, HARQ retransmission data: consists of a Header (Header) and one or more HARQ process data. The HARQ process refers to an HARQ process in which the exiting TRP # i has already been transmitted to the terminal but has not received ACK/NACK feedback from the terminal, and the number of transmissions has not reached the maximum number of transmissions. Correspondingly, the data in the HARQ buffer area is correspondingly sent by the HARQ process; and/or the quitting TRP # i sends HARQ process data to the terminal, receives NACK information fed back by the terminal, and sends data in a HARQ buffer corresponding to the HARQ process which has not reached the maximum transmission times but has not retransmitted the HARQ data to form HARQ process data.

And the data in the transmission HARQ buffer area is generated by coding the data to be transmitted by the high layer HARQ. The packet header is composed of the following information: HARQ information, retransmission HARQ process information and mapping information of high-level data to be confirmed sent by the HARQ, wherein the number of the retransmission HARQ process information is the same as that of the HARQ process data, and each retransmission HARQ process information corresponds to each HARQ process data in sequence; the number of the HARQ process data is the same as the number of the high-level data to be confirmed sent by the HARQ, and each HARQ process data corresponds to each high-level data block to be confirmed sent by the HARQ in sequence. For example, the HARQ information may include: identity of joined TRP, total number of HARQ processes H, HARQ maximum transmission times C, and Redundancy Version (RV) selection strategy. The retransmitting HARQ process information may include: HARQ process identification, number of times count that HARQ process has been transmitted, RV used for each transmission, and length of transmission HARQ buffer. The mapping information with the HARQ transmitted higher layer data to be acknowledged may include: the number of the high-level data blocks to be confirmed are sent by the HARQ, and the length of each high-level data block to be confirmed is sent by the HARQ. For example, in the embodiment of the present application, the HARQ retransmission data exiting the TRP # i may be denoted as HARQ retransmission data # i.

After receiving the quit instruction information, the quit TRP # i transmits the HARQ retransmission data # i to the franchised TRP # N through the HARQ transmission entity # i corresponding to the quit TRP # i before quitting, so that the franchised TRP # N can directly receive the HARQ retransmission data # i from the HARQ transmission entity # i corresponding to the quit TRP # i, and the obtaining efficiency of the HARQ retransmission data # i can be effectively improved because the franchised TRP # N can further reduce the transmission delay of the HARQ retransmission data # i when transmitting the HARQ retransmission data # i without receiving IP data from the HARQ transmission entity # i corresponding to the quit TRP # i and coding the IP data as in the prior art.

For example, in the embodiment of the present application, after receiving the exit instruction information, the exit TRP # i may send its HARQ retransmission data to the franchised TRP # N, and may also send its high-layer data to be sent to the franchised TRP # N, which may of course include other data, and may be specifically set according to actual needs. The data to be transmitted by the higher layer may include the data to be transmitted by the HARQ to be confirmed and the data to be transmitted by the HARQ to be transmitted by the higher layer. The HARQ transmission of the high-level data to be confirmed is composed of one or more HARQ transmission high-level data blocks to be confirmed, and each HARQ transmission high-level data block to be confirmed is high-level data corresponding to HARQ retransmission data in the exiting TRP # i. The high-layer data to be sent by the HARQ means high-layer data which exits TRP # i and is to be sent to the terminal but is not coded and enters the HARQ circular buffer. For example, in the embodiment of the present application, the data to be transmitted in the higher layer exiting the TRP # i may be recorded as the data to be transmitted in the higher layer # i.

Referring to fig. 4, fig. 4 is a schematic diagram of another data transmission provided in the embodiment of the present application, taking TRP # i as an exit TRP, which may be denoted as an exit TRP # i, and assuming that the exit TRP # i performs HARQ transmission with a terminal through 6 HARQ processes, where the 6 HARQ processes are HARQ process #0, HARQ process #1, HARQ process #/2, HARQ process #3, HARQ process #/4, and HARQ process #/5, respectively, to perform HARQ transmission with the terminal. Assuming that when exiting TRP # i to interact with the terminal, the data in the buffer of transmission HARQ process #0 in the corresponding HARQ transmission entity # i has been transmitted through HARQ process 0, the data in the buffer of transmission HARQ process #1 in the corresponding HARQ transmission entity # i has been transmitted through HARQ process 1, the data in the buffer of transmission HARQ process #2 in the corresponding HARQ transmission entity # i has been transmitted through HARQ process 2, the data in the buffer of transmission HARQ process #3 in the corresponding HARQ transmission entity # i has been transmitted through HARQ process 3, the data in the buffer of transmission HARQ process #4 in the corresponding HARQ transmission entity # i has been transmitted through HARQ process 4, and the data in the buffer of transmission HARQ process #5 in the corresponding HARQ transmission entity # i has been transmitted through HARQ process 5; moreover, the HARQ sending entity # i receives the NACK information of the HARQ process 0 sent by the terminal, which indicates that the decoding of the data in the buffer area of the HARQ process #0 is failed; and not receiving the NACK information of HARQ process 1 and HARQ process 5 sent by the terminal, receiving the ACK information of HARQ process 2, HARQ process 3, and HARQ process 4 sent by the terminal, which indicates that decoding of sending HARQ process #2 buffer data, sending HARQ process #3 buffer data, and sending HARQ process #4 buffer data is successful, releasing the sending HARQ process #2 buffer data, sending HARQ process #3 buffer data, and sending HARQ process #4 buffer data; and transmitting the unsuccessfully decoded transmission HARQ process #0 buffer data, transmission HARQ process #1 buffer data and transmission HARQ process #5 buffer data as the HARQ retransmission data # i exiting the TRP # i to the joining TRP # N, so that the joining TRP # N continuously transmits the HARQ retransmission data # i exiting the TRP # i.

Through the above S302 and S303, when the master network determines that the exit TRP # i exists, the exit TRP # i may transmit the HARQ retransmission data thereof to the franchised TRP through the HARQ transmitting entity corresponding to the exit TRP # i according to the exit indication information by transmitting the exit indication information to the exit TRP # i, thereby completing data interaction between the exit TRP # i and the franchised TRP # N, and the franchised TRP # N continuously transmits the HARQ retransmission data of the exit TRP # i to the terminal.

The master TRP also transmits transmission instruction information to the TRP # N so that the TRP # N transmits HARQ retransmission data exiting the TRP # i to the terminal through the HARQ transmitting entity # N corresponding to the TRP # N, thereby realizing retransmission of the HARQ retransmission data exiting the TRP # i, that is, the following S304 and S305 are performed:

and S304, the main TRP sends transmission indication information to the franchised TRP.

The transmission indication information is used for indicating the HARQ sending entity corresponding to the joining TRP to send HARQ retransmission data.

And S305, the franchised TRP transmits HARQ retransmission data to the terminal through the HARQ transmission entity corresponding to the franchised TRP.

With continuing the description in S302, when the franchised TRP # N receives the HARQ retransmission data # i forwarded by the quit TRP # i and then transmits the HARQ retransmission data # i to the terminal through the HARQ transmitting entity # N corresponding to the franchised TRP # N, the franchised TRP # N may analyze the HARQ retransmission data # i to obtain the header information and the HARQ process data of the quit TRP # i, where the HARQ process data is the target HARQ process data that the franchised TRP # N needs to transmit. When transmitting the target HARQ process data to the terminal based on the header information, a Physical Downlink Control Channel (PDCCH) of the header may be analyzed, a PDCCH for exiting the scheduling of the HARQ retransmission data # i of the TRP # i may be acquired and denoted as PDCCH # i, and a target transmission HARQ process for transmitting the target HARQ process data may be determined in the HARQ transmitting entity # N corresponding to the joining TRP # N based on the PDCCH # i. For example, the physical downlink control channel may include, in addition to the TRP identifier of the PDCCH, that is, the TRP # i, information used for terminal demodulation, such as a time-frequency domain position, a modulation and coding scheme, and interleaving, and may be specifically set according to actual needs.

For example, when determining a target transmission HARQ process for transmitting target HARQ process data in the HARQ transmission entity agent # i, a transmission HARQ process that is the same as an identifier of a transmission HARQ process used when exiting the TRP # i to transmit the target HARQ process data may be determined in the HARQ transmission entity agent # i according to the packet header information including the identifier of the transmission HARQ process used when exiting the TRP # i to transmit the target HARQ process data, and the same transmission HARQ process may be determined as the target transmission HARQ process for transmitting the target HARQ process data. The target transmission HARQ process can be used for transmitting HARQ process data of the franchised TRP # N, and the target transmission HARQ process transmits the target HARQ process data according to PDCCH # i exiting TRP # i.

In addition, after sequentially transmitting the target HARQ process data to the terminal through the target transmission HARQ process, updating the transmission times of the target HARQ process data according to the transmission times of the franchised TRP # N and the transmission times of the quitting TRP # i included in the packet header information; and waits for ACK/NACK feedback, i.e., response information, of the receiving terminal. If the joining TRP # N receives first information, namely ACK feedback information, sent by the terminal and indicating that the target sending HARQ process is successful; explaining that the decoding of the HARQ process data transmitted through the target transmission HARQ process is successful, the franchised TRP # N may release the buffer data corresponding to the target transmission HARQ process and transmit the HARQ process data of the franchised TRP # N through the target transmission HARQ process. Or, if the joining TRP # N receives second information, that is, NACK feedback information, indicating that decoding of the HARQ process data sent by the target sending HARQ process fails, that is, the joining TRP # N may further determine that the number of transmission times of the target HARQ process data is less than the maximum number of transmission times, and if the number of transmission times is less than the maximum number of transmission times, send the target HARQ process data to the terminal through the target sending HARQ process again until the number of transmission times of the target HARQ process data is greater than or equal to the maximum number of transmission times; and if the transmission times of the target HARQ process data are larger than or equal to the maximum transmission times, releasing the buffer area data corresponding to the target transmission HARQ process, and transmitting the HARQ process data of the franchised TRP # N through the target transmission HARQ process.

It can be seen that, in the embodiment of the present application, the franchised TRP # N determines the target transmission HARQ process for transmitting the HARQ retransmission data # i exiting the TRP # i in the corresponding HARQ transmission entity # N, and transmits the HARQ retransmission data # i of the TRP # i to the terminal through the target transmission HARQ process, and with respect to the HARQ process data # N of the TRP # N itself, the HARQ process data # N of the franchised TRP # N can be transmitted to the terminal through the other transmission HARQ processes except the target transmission HARQ process in the HARQ transmission entity # N.

For example, in combination with the description in S303, in addition to sending the HARQ retransmission data # i to the franchised TRP # N, the quit TRP # i may also send the higher layer data to be sent to the franchised TRP # N, so that the franchised TRP # N also sends the higher layer data to be sent that quits TRP # i to the terminal. When the franchised TRP # N sends the HARQ retransmission data quitting TRP # i and the high-level data to be sent to the terminal, the franchised TRP # N can send the HARQ retransmission data quitting TRP # i preferentially and send the high-level data to be sent quitting TRP # i secondly; the high-level data to be transmitted exiting the TRP # i can also be transmitted preferentially, and the HARQ retransmission data exiting the TRP # i can be transmitted secondly, which can be specifically set according to actual needs. In order to reduce the transmission delay of the HARQ retransmission data exiting from the TRP # i, the embodiment of the present application is described by taking an example that the HARQ retransmission data exiting from the TRP # i is transmitted first and then the higher layer data to be transmitted exiting from the TRP # i is transmitted second, but the embodiment of the present application is not limited thereto.

After receiving high-level data to be sent of TRP # i quits, the joining TRP # N establishes a mapping relation between each HARQ-sent high-level data block to be confirmed and each HARQ process data in the high-level data to be sent of TRP # i quits and the high-level data to be sent of the joining TRP # N to be confirmed based on mapping information between packet headers and the HARQ-sent high-level data to be confirmed, soft-combines the high-level data to be sent of TRP # i quits into the high-level data to be sent of the joining TRP # N, and sends the high-level data to be sent of the joining TRP # N and the high-level data to be sent of the joining TRP # N to a terminal together through a HARQ sending entity corresponding to the joining TRP # N.

After the master TRP # k transmits the transmission instruction information to the franchised TRP # N through the above-described S304 and S305, the franchised TRP # N determines the target transmission HARQ process for transmitting the HARQ retransmission data # i for exiting the TRP # i in the corresponding HARQ transmission entity, and transmits the HARQ retransmission data # i for the TRP # i to the terminal through the target transmission HARQ process. In order to ensure normal transmission of target HARQ process data exiting TRP # i, correspondingly, the main TRP # k also sends configuration information to the terminal, so that the terminal determines, after determining the exiting TRP # i and the franchised TRP # N, a HARQ receiving entity corresponding to the exiting TRP # i for receiving the target HARQ process data exiting TRP # i from the HARQ receiving entities corresponding to the terminal, and receives retransmission data through HARQ by the HARQ receiving entity corresponding to the exiting TRP # i, that is, the following S306-S308 are executed:

s306, the main TRP sends configuration information to the terminal.

The configuration information is used for instructing the terminal to receive HARQ retransmission data from the HARQ transmission entity corresponding to the franchised TRP.

For example, the master TRP # k may determine whether the master TRP needs to be changed before transmitting the configuration information to the terminal. When judging whether the master TRP needs to be changed, in order to avoid frequently switching the master TRP and influence on data transmission, whether the master TRP # k is included in the target TRP set or not can be judged firstly; if the primary TRP # k is included and the channel quality of the primary TRP # k is greater than the first threshold, the primary TRP # k is continuously determined as a new primary TRP, i.e., the primary TRP does not need to be changed, even if the channel quality of the primary TRP # k is not optimal, as long as the channel quality is greater than the first threshold, so that the influence of frequently switching the primary TRP on data transmission can be avoided. On the contrary, if the main TRP # k is not included, determining a TRP having the best channel quality in the target TRP set, and determining the TRP having the best channel quality as a new TRP; sending a change request message to the TRP with the best channel quality, wherein the change request message is used for indicating the TRP with the best channel quality as a new main TRP; of course, the TRP with the second best channel quality in the target TRP set may also be used as the new primary TRP, and may be specifically set according to actual needs. And the new main TRP receives the change request message sent by the main TRP, performs corresponding configuration according to the change request message, and can reply a change confirmation message to the main TRP # k after the configuration is completed. For example, in the embodiment of the present application, after the determination, it is determined that the master TRP # k continues to be used as a new master TRP, that is, the master TRP is not changed.

The master TRP # k may send configuration information to the terminal, for example, the configuration information includes two TRP sets, which are a pre-configured TRP set and a target TRP set, respectively; and/or transmitting indication information. In addition, if the master TRP is changed, the configuration information may further include an identifier of the changed TRP.

It is to be understood that, in the above configuration information, if a pre-configured TRP set and a target TRP set exist, the pre-configured TRP set and the target TRP set may be included in the configuration information, and if not, the pre-configured TRP set and the target TRP set may be absent; similarly, if there is transmission indication information, the transmission indication information may be included in the configuration information, and if there is no transmission indication information, the configuration information may be left blank; if there is a change in the master TRP, the identity of the TRP after the change may be included in the configuration information. If all the three kinds of information are vacant, that is, there is no configuration/reconfiguration signaling, the procedure is ended.

After the master TRP # k transmits the configuration information to the terminal, the terminal may determine an exit TRP # i from a TRP set preconfigured for the terminal according to the configuration information, and determine an affiliate TRP # N for transmitting HARQ retransmission data of the exit TRP # k from a target TRP set, that is, perform the following S307:

s307, the terminal determines an exiting TRP in a TRP set pre-configured for the terminal according to the configuration information, and determines a joining TRP for sending HARQ retransmission data of the exiting TRP in a target TRP set.

Wherein the franchised TRP does not belong to the preconfigured TRP set, and the target TRP set does not include the exit TRP.

Taking the example that the configuration information includes two TRP sets, the terminal may compare the two TRP sets, that is, the preconfigured TRP set and the target TRP set, determine the TRP exit from the preconfigured TRP set, and determine the TRP belonging to the target TRP set and not belonging to the preconfigured TRP set as the TRP exit, and similarly, the terminal may determine the TRP not belonging to the preconfigured TRP set in the target TRP set; a TRP that does not belong to a preconfigured set of TRPs is determined as an affiliate TRP. For example, in the embodiment of the present application, assuming that the TRP # N belongs to the target TRP set but does not belong to a preconfigured TRP, the TRP # N is determined to be an imposed TRP and may be denoted as an imposed TRP # N.

Taking the example that the configuration information includes the transmission indication information, the terminal may directly determine the withdrawal TRP # i and the alignment TRP # N, based on the transmission indication information, e.g., { TRP # i, TRP # N }, that HARQ retransmission data describing the withdrawal TRP # i is HARQ-retransmitted by the alignment TRP # N.

And after determining to quit the TRP # i, the terminal stops feeding back the response information to the quit TRP # i and stores the data which is transmitted by the HARQ transmitting entity corresponding to the quit TRP # i. Furthermore, the terminal needs to determine an HARQ receiving entity for receiving HARQ retransmission data exiting TRP # i from HARQ receiving entities corresponding to the terminal, that is, to perform the following S307:

s308, the terminal determines to quit the HARQ receiving entity corresponding to the TRP in the terminal.

The HARQ receiving entity corresponding to the TRP quitting can be used for receiving HARQ process data of the TRP joining, and the HARQ receiving entity corresponding to the TRP quitting receives HARQ retransmission data of the TRP quitting # i according to a physical downlink control channel of the TRP joining.

In conjunction with the related description of fig. 1, because the network configures a terminal with a TRP set TRPSet, { TRP #0, …, TRP # i, …, TRP # N-1}, each TRP corresponds to a respective HARQ transmitting entity; correspondingly, the terminal may be configured with N HARQ receiving entities corresponding to the HARQ transmitting entities, where the N HARQ receiving entities may be represented by a set RxSet ═ { HARQ receiving entity #0, …, HARQ receiving entity # N-1}, and elements of the RxSet correspond to elements of the TRPSet one to one.

When determining the HARQ receiving entity for receiving the HARQ retransmission data exiting from the TRP # i among the N HARQ receiving entities of the terminal, the HARQ receiving entity corresponding to the exiting TRP # i may continue to receive the HARQ retransmission data exiting from the TRP # i, which assists the TRP transmission. For example, when determining to quit the HARQ receiving entity corresponding to TRP # i, the physical downlink control channel of the quit TRP # i sent by the HARQ transmitting entity corresponding to the franchised TRP # N may be received; and determining an HARQ receiving entity corresponding to the quit TRP # i in the terminal according to the physical downlink control channel which is used for quitting the scheduling of the HARQ retransmission data # i of the TRP # i and is included in the physical downlink control channel. For example, in the embodiment of the present application, the HARQ receiving entity corresponding to the exited TRP # i may be denoted as HARQ receiving entity # i.

After determining to quit the HARQ receiving entity corresponding to TRP # i, the HARQ retransmission data sent by the HARQ sending entity corresponding to the imposed TRP # N may be received, that is, the following S308 is executed:

s309, the terminal receives HARQ retransmission data sent by the HARQ sending entity corresponding to the joined TRP by exiting the HARQ receiving entity corresponding to the TRP.

After determining the HARQ receiving entity corresponding to the TRP # i to quit, it is further necessary to determine a target receiving HARQ process for receiving the HARQ retransmission data of the TRP # i in the HARQ receiving entity corresponding to the TRP # i to quit, and receive the HARQ retransmission data of the TRP # i to quit, which is sent by the HARQ sending entity corresponding to the franchised TRP # N, through the target receiving HARQ process.

For example, when determining a target HARQ process in the HARQ receiving entity corresponding to the TRP # i, because the physical downlink control channel of the TRP # i also includes an identifier of a transmission HARQ process used when the TRP # i transmits target HARQ process data, the target HARQ process that is the same as the identifier of the transmission HARQ process used when the TRP # i transmits target HARQ process data may be determined in the HARQ receiving entity corresponding to the TRP # i; and receiving target HARQ process data transmitted through the HARQ transmission entity corresponding to the franchised TRP # N through the target receiving HARQ process.

It can be seen that, in the embodiment of the present application, the terminal determines, from among the plurality of HARQ receiving entities corresponding to the terminal, the HARQ receiving entity corresponding to the TRP # i to quit, and receives, through the target receiving HARQ process therein, the target HARQ process data of the TRP # i to quit, which is sent by the TRP # N to be joined. For the HARQ process data of the joining TRP # N itself, other receiving HARQ processes except the target receiving HARQ process may be determined in the HARQ receiving entity corresponding to the joining TRP # N; and receiving the HARQ process data of the joining TRP # N through other receiving HARQ processes, thereby realizing that the receiving of the HARQ process data of the joining TRP # N can not be influenced under the condition of receiving the target HARQ process data exiting the TRP # i.

After receiving target HARQ process data through a target receiving HARQ process, the terminal caches the target HARQ process data to a cache region corresponding to the target receiving HARQ process if the target HARQ process data is retransmission data; if the target HARQ process data is newly transmitted data, clearing cache region data corresponding to the target receiving HARQ process, and caching the target HARQ process data into a cache region corresponding to the target receiving HARQ process; decoding a cache region corresponding to a target receiving HARQ process; and sending response information to the terminal according to the decoding processing result.

Illustratively, when response information is sent to a terminal according to a decoding processing result, if the decoding processing result indicates that the decoding is correct, first information that a target sending HARQ process is successful is sent to the target joining TRP # N, buffer area data corresponding to the target sending HARQ process is released, and HARQ process data of the joining TRP is received through the target receiving HARQ process; on the contrary, if the decoding processing result indicates that the decoding is wrong, sending second information that the target sending HARQ process fails to the joined TRP # N, further judging whether the transmission times of the target HARQ process data are smaller than the maximum transmission times, if so, receiving the data passing through the target HARQ process again through the target receiving HARQ process until the transmission times of the target HARQ process data are larger than or equal to the maximum transmission times; and if the number of times of transmission is larger than or equal to the maximum number of times of transmission, releasing the buffer data corresponding to the target transmission HARQ process, and receiving the HARQ process data of the franchised TRP # N through the target receiving HARQ process.

It can be seen that, in the embodiment of the application, when it is determined that the exit TRP exists in the TRP set configured for the terminal, the main TRP sends exit indication information to the exit TRP, so that the exit TRP directly sends HARQ retransmission data to the franchised TRP; transmitting transmission indication information to the joining TRP so that the joining TRP transmits HARQ retransmission data through a HARQ transmitting entity corresponding to the joining TRP; and sending configuration information to the terminal so that the terminal receives HARQ retransmission data by exiting the HARQ receiving entity corresponding to the TRP. Therefore, the franchised TRP directly receives the HARQ retransmission data sent by the quitting TRP, the IP data of the quitting TRP does not need to be coded, and the HARQ retransmission data is directly sent through the HARQ sending entity corresponding to the franchised TRP, so that the terminal can acquire the HARQ retransmission data of the quitting TRP, the transmission delay of the HARQ retransmission data of the quitting TRP is reduced, and the acquisition efficiency of the HARQ retransmission data of the quitting TRP is improved. In addition, the HARQ transmitting entity corresponding to the franchised TRP transmits the HARQ retransmission data exiting the TRP, so that the reliability of the transmission of the HARQ retransmission data exiting the TRP can be improved.

It should be noted that, in this embodiment of the present application, after the whole data transmission process is finished, the determined target TRP set may be preconfigured to the terminal, and the target TRP set is used as a new preconfigured TRP set of the terminal, so as to update the TRP set preconfigured by the terminal.

It can be seen that, in the embodiment of the present application, when there is an exit TRP in a TRP set configured for a terminal, a target TRP set is determined to be a franchised TRP, and HARQ retransmission data is sent by a HARQ sending entity corresponding to the franchised TRP, so that the terminal acquires the HARQ retransmission data of the exit TRP. Note that the target TRP set may include a cooperative TRP in addition to the franchised TRP, and the cooperative TRP belongs to a pre-configured network device set unlike the franchised TRP. When the franchised TRP and the cooperative TRP exist in the target TRP set at the same time, HARQ retransmission data exiting the TRP can be jointly transmitted through the franchised TRP and the cooperative TRP.

For example, when HARQ retransmission data for withdrawing a TRP is jointly transmitted through a franchised TRP and a cooperative TRP, a method for transmitting the HARQ retransmission data for withdrawing the TRP for the franchised TRP may be similar to the above-mentioned method for transmitting HARQ retransmission data for withdrawing a TRP separately through a franchised TRP, and reference may be made to the above-mentioned related description of the method for transmitting HARQ retransmission data for withdrawing a TRP separately through a franchised TRP, and details of the embodiments of the present application are not repeated herein. For the cooperative TRP, by receiving the transmission indication information sent by the main TRP, after HARQ retransmission data exiting the TRP is received, the HARQ retransmission data exiting the TRP is sent by a corresponding HARQ sending entity, so that the terminal can acquire the HARQ retransmission data exiting the TRP.

For convenience of understanding the technical solution provided by the embodiment of the present application, refer to fig. 5, where fig. 5 is a schematic diagram of another data transmission provided by the embodiment of the present application, taking TRP # i as an example of exiting TRP, which may be denoted as exiting TRP # i, and it is assumed that the exiting TRP # i performs HARQ transmission with a terminal through 6 HARQ processes, where the 6 HARQ processes are HARQ process #0, HARQ process #1, HARQ process #/2, HARQ process #3, HARQ process #/4, and HARQ process #/5, respectively, to perform HARQ transmission with the terminal. Suppose that when exiting TRP # i and interacting with a terminal, the high-level data to be transmitted by HARQ and the high-level data to be confirmed which are transmitted by HARQ are transmitted to the joining TRP # N, the joining TRP # N soft-combines the high-level data to be transmitted by HARQ which exits TRP # i into the high-level data to be transmitted by the self-body HARQ, and the combined high-level data is transmitted to the terminal through the HARQ transmitting entity # N of the joining TRP # N. For the HARQ exiting TRP # i to send the high-level data to be confirmed, determining a target transmission HARQ process for sending the HARQ retransmission data # i exiting TRP # i in the HARQ sending entity # N. Assuming that HARQ exiting TRP # i transmits HARQ retransmission data # i corresponding to higher layer data to be confirmed, the HARQ retransmission data # i includes HARQ process #0 buffer data, HARQ process #1 buffer data, and HARQ process #5 buffer data, and correspondingly, a joining TRP # N may determine HARQ process #0, HARQ process #1, and HARQ process #5 for transmitting HARQ retransmission data # i in its HARQ transmitting entity # N, and transmit HARQ process #0 buffer data to a terminal through HARQ process #0 in HARQ transmitting entity # N, and correspondingly, the terminal also receives and transmits HARQ process #0 buffer data through HARQ process #0 in HARQ receiving entity # i exiting TRP # i, and buffers the received and transmitted HARQ process #0 buffer data into a received HARQ process #0 buffer; similarly, the data in the buffer of the transmission HARQ process #1 is transmitted to the terminal through the HARQ process #1 in the HARQ transmitting entity # N, and correspondingly, the terminal also receives the data in the buffer of the transmission HARQ process #1 through the HARQ process #1 in the HARQ receiving entity # i which exits the TRP # i, and buffers the data in the buffer of the transmission HARQ process #1 into the buffer of the reception HARQ process # 1; and correspondingly, the terminal also receives the buffer data of the transmission HARQ process #5 through the HARQ process #5 in the HARQ receiving entity # i which exits the TRP # i, and buffers the received buffer data of the transmission HARQ process #5 into the buffer of the receiving HARQ process # 5.

The terminal respectively decodes the data of the buffer area of the received HARQ process #0, the data of the buffer area of the received HARQ process #1 and the data of the buffer area of the received HARQ process #5, and if the data of the buffer area of the received HARQ process #0 is decoded correctly, the ACK information of the HARQ process #0 is sent to the HARQ sending entity # N, the HARQ sending entity # N releases and sends the data of the buffer area of the HARQ process #0, and the HARQ process data of the franchised TRP # N can be received through the sent HARQ process # 0. Assuming that the decoding of the received HARQ process #1 buffer data is also correct, ACK information that the HARQ process #1 succeeds is transmitted to the HARQ transmitting entity # N, and the HARQ transmitting entity # N releases the transmission of the HARQ process #1 buffer data and can receive HARQ process data of the imposed TRP # N through the transmission of the HARQ process # 1. If the received HARQ process #5 buffer data is decoded incorrectly, ACK information of HARQ process #5 failure is sent to a HARQ sending entity # N, the HARQ sending entity # N judges whether the transmission times of the received HARQ process #5 buffer data are smaller than the maximum transmission times, if the transmission times are smaller than the maximum transmission times, the HARQ process #5 in the HARQ sending entity # N is used for sending the sent HARQ process #5 buffer data to a terminal, and correspondingly, the terminal also receives the sent HARQ process #5 buffer data again through the HARQ process #5 in the HARQ receiving entity # i which exits TRP # i and caches the received sent HARQ process #5 buffer data to the received HARQ process #5 buffer; and decoding the data in the buffer area of the received HARQ process #5 again until the data in the buffer area of the received HARQ process #5 is decoded successfully, or the transmission times of the data in the buffer area of the received HARQ process #5 are more than or equal to the maximum transmission times, releasing and sending the data in the buffer area of the HARQ process #5 by the terminal, and receiving the data in the HARQ process of the franchised TRP # N by the sending HARQ process # 5.

When the HARQ retransmission data # i exiting the TRP # i is continuously transmitted, the franchised TRP # N does not affect the transmission of the HARQ process data # N of the franchised TRP # N, and other HARQ processes except the HARQ process #0, the HARQ process #1 and the HARQ process #5 are determined in the HARQ receiving entity # N corresponding to the franchised TRP # N, and are respectively the HARQ process #2, the HARQ process #3 and the HARQ process #4, and the HARQ process data # N of the franchised TRP # N is transmitted through the HARQ process #2, the HARQ process #3 and the HARQ process # 4. When any HARQ process buffer data is released among HARQ process #0, HARQ process #1, and HARQ process #5, the HARQ process may be added to the set of HARQ process data # N for transmitting the imposed TRP # N, and the HARQ process data # N for the imposed TRP # N may be transmitted together with HARQ process #2, HARQ process #3, and HARQ process # 4.

It can be seen that, in the embodiment of the application, when exiting the TRP # i and performing data interaction with the terminal, the exiting TRP # i directly sends HARQ retransmission data # i to the franchised TRP # N; correspondingly, the franchised TRP # N determines a target transmission HARQ process for transmitting the HARQ retransmission data # i quitting the TRP # i in the corresponding HARQ transmission entity # N, and transmits the HARQ retransmission data # i quitting the TRP # i to the terminal through the target transmission HARQ process; correspondingly, the terminal receives the HARQ retransmission data # i by exiting the HARQ process in the HARQ receiving entity # i corresponding to the TRP # i. Therefore, the franchised TRP # N directly receives the HARQ retransmission data # i sent by the quitting TRP # i, the IP data of the quitting TRP # i does not need to be coded, and the HARQ retransmission data # i is directly sent through the target sending HARQ process in the HARQ sending entity # N corresponding to the franchised TRP # N, so that the terminal can obtain the HARQ retransmission data # i of the quitting TRP # i, the transmission delay of the HARQ retransmission data # i of the quitting TRP # i is reduced, and the obtaining efficiency of the HARQ retransmission data # i of the quitting TRP # i is improved. In addition, the HARQ transmission entity # N corresponding to the franchised TRP # N transmits the HARQ retransmission data # i quitting the TRP # i, so that the reliability of the transmission of the HARQ retransmission data # i quitting the TRP # i can be improved.

Fig. 6 is a schematic structural diagram of a data transmission device 60 according to an embodiment of the present application, for example, please refer to fig. 6, where the data transmission device 60 may include:

a processing unit 601, configured to determine a joining TRP for sending data to be transmitted that exits the TRP in a target TRP set when it is determined that the exiting TRP exists in a TRP set of sending and receiving nodes preconfigured for a terminal; the franchised TRP does not belong to a pre-configured TRP set, the target TRP set does not comprise the quit TRP, and the data to be transmitted comprises hybrid automatic repeat request (HARQ) retransmission data.

A sending unit 602, configured to send exit indication information to an exit TRP; the quitting indication information is used for indicating the quitting TRP to send the HARQ retransmission data to the franchised TRP.

A sending unit 602, configured to send transmission indication information to the joining TRP; the transmission indication information is used for indicating the HARQ sending entity corresponding to the joining TRP to send HARQ retransmission data.

A sending unit 602, configured to send configuration information to the terminal; the configuration information is used for instructing the terminal to receive HARQ retransmission data from the HARQ transmission entity corresponding to the franchised TRP.

Optionally, the processing unit 601 is further configured to establish a mapping relationship between the TRP quit and the TRP franchised based on the identifier of the TRP quit and the identifier of the TRP franchised, where the mapping relationship is transmission indication information.

Optionally, the processing unit 601 is further configured to compare the target TRP set with the preconfigured TRP set, and determine TRPs in the target TRP set that do not belong to the preconfigured TRP set; and determining TRPs that do not belong to the preconfigured set of TRPs as enrolled TRPs.

Optionally, the processing unit 601 is further configured to determine, in the pre-configured TRP set, a TRP that does not belong to the target TRP set; and determining a TRP not belonging to the target TRP set as an exit TRP.

Optionally, the data transmission apparatus 60 further includes a receiving unit 603.

A receiving unit 603, configured to receive channel quality measurement results of multiple TRPs to be measured sent by a terminal; wherein all TRPs and at least one other TRP in a pre-configured set of TRPs are included in the plurality of TRPs to be measured.

The processing unit 601 is further configured to determine, according to channel quality measurement results of the multiple TRPs to be measured, a TRP of which channel quality is greater than a preset threshold among the multiple TRPs to be measured, where the TRP of which channel quality is greater than the preset threshold constitutes a target TRP set.

Optionally, the processing unit 601 is further configured to determine whether the target TRP set includes a master TRP; if the primary TRP is included and the channel quality of the primary TRP is greater than the first threshold, the primary TRP is continuously determined as a new primary TRP.

Optionally, the processing unit 601 is further configured to determine a TRP with the best channel quality in the target TRP set if the primary TRP is not included.

A sending unit 602, configured to send a change request message to the TRP with the best channel quality; wherein, the change request message is used for indicating the TRP with the best channel quality as the new main TRP.

The data transmission device 60 provided in this embodiment of the present application can implement the technical solution of the data transmission method on the main TRP side in any one of the embodiments described above, and its implementation principle and beneficial effect are similar to those of the data transmission method on the main TRP side, and reference may be made to the implementation principle and beneficial effect of the data transmission method on the main TRP side, which are not described herein again.

Fig. 7 is a schematic structural diagram of another data transmission device 70 according to an embodiment of the present application, and for example, please refer to fig. 7, the data transmission device 70 may include:

a receiving unit 701, configured to receive transmission indication information sent by a master transmitting and receiving node TRP; the transmission indication information is used for indicating the joining TRP in the target TRP set to send data to be transmitted which quits the TRP; the joining TRP is determined when the exiting TRP exists in a TRP set pre-configured for the terminal, the joining TRP does not belong to the pre-configured TRP set, the exiting TRP is not included in a target TRP set, and the data to be transmitted comprises hybrid automatic repeat request (HARQ) retransmission data.

The receiving unit 701 is further configured to receive HARQ retransmission data exiting TRP transmission.

A sending unit 702, configured to send HARQ retransmission data to the terminal through the HARQ sending entity corresponding to the imposed TRP.

Optionally, the data transmission apparatus 70 further includes a processing unit 703.

The processing unit 703 is configured to parse the HARQ retransmission data to obtain packet header information and target HARQ process data corresponding to the exited TRP.

The sending unit 702 is specifically configured to send target HARQ process data to the terminal through the HARQ sending entity corresponding to the imposed TRP based on the packet header information.

Optionally, the packet header information includes an identifier of a transmission HARQ process used when exiting the TRP to transmit the target HARQ process data.

The processing unit 703 is further configured to determine, in the HARQ transmission entity corresponding to the imposed TRP, a target HARQ process that is the same as the HARQ process identifier used when the TRP is exited to transmit the target HARQ process data.

A sending unit 702, specifically configured to send target HARQ process data to a terminal through a target transmission HARQ process; wherein, the target transmission HARQ process can be used for transmitting HARQ process data of the franchised TRP.

Optionally, the target HARQ process is to send target HARQ process data according to a physical downlink control channel of the franchised TRP.

Optionally, the processing unit 703 is further configured to update the transmission number of the target HARQ process data according to the transmission number of the franchised TRP and the transmission number of the quit TRP included in the packet header information.

Optionally, the receiving unit 701 is further configured to receive a first message that a target transmission HARQ process is successful, where the first message is sent by the terminal.

The processing unit 703 is further configured to release, according to the first message, the buffer data corresponding to the target transmission HARQ process.

The transmitting unit 702 is further configured to transmit HARQ process data of the imposed TRP through the target transmission HARQ process.

Optionally, the receiving unit 701 is further configured to receive a second message that the target transmission HARQ process fails, where the second message is sent by the terminal.

The sending unit 702 is further configured to, if it is determined based on the second message that the number of transmission times of the target HARQ process data is less than the maximum number of transmission times, send the target HARQ process data to the terminal through the target transmission HARQ process again until the number of transmission times of the target HARQ process data is greater than or equal to the maximum number of transmission times.

The processing unit 703 is further configured to release the buffer data corresponding to the target transmission HARQ process if it is determined that the number of transmissions of the target HARQ process data is greater than or equal to the maximum number of transmissions based on the second message.

Optionally, the data to be transmitted includes data to be transmitted in a high layer.

The sending unit 702 is further configured to send the high-layer data to be sent and the high-layer data to be sent of the franchised TRP to the terminal together through the HARQ sending entity corresponding to the franchised TRP.

Optionally, the transmitting unit 702 is further configured to transmit HARQ process data of the joining TRP to the terminal through another transmission HARQ process except the target transmission HARQ process in the HARQ transmitting entity corresponding to the joining TRP.

The data transmission device 70 provided in this embodiment of the present application can execute the technical solution of the data transmission method on the joining TRP side in any one of the above embodiments, and its implementation principle and beneficial effect are similar to those of the data transmission method on the joining TRP side, and reference may be made to the implementation principle and beneficial effect of the data transmission method on the joining TRP side, which are not described herein again.

Fig. 8 is a schematic structural diagram of another data transmission device 80 according to an embodiment of the present application, for example, please refer to fig. 8, where the data transmission device 80 may include:

a receiving unit 801, configured to receive configuration information sent by the primary transmitting and receiving node TRP.

A processing unit 802, configured to determine, according to configuration information, a quit TRP in a TRP set preconfigured for a terminal, and determine, in a target TRP set, a joining TRP for sending data to be transmitted that quits the TRP; the franchised TRP does not belong to a pre-configured TRP set, the target TRP set does not comprise the quit TRP, and the data to be transmitted comprises hybrid automatic repeat request (HARQ) retransmission data.

A processing unit 802, further configured to determine, in the terminal, to exit an HARQ receiving entity corresponding to the TRP; the HARQ receiving entity corresponding to the TRP quitting can be used for receiving the HARQ process data of the joining TRP.

The receiving unit 801 is further configured to receive HARQ retransmission data sent by the HARQ transmitting entity corresponding to the imposed TRP by exiting the HARQ receiving entity corresponding to the TRP.

Optionally, the processing unit 802 is further configured to stop sending the response information to the TRP exit, and store the data that has been sent by the HARQ sending entity corresponding to the TRP exit.

Optionally, the HARQ receiving entity that exits the TRP receives HARQ retransmission data according to a physical downlink control channel of the joined TRP.

Optionally, the receiving unit 801 is further configured to receive a physical downlink control channel of the joining TRP sent by the HARQ sending entity corresponding to the joining TRP;

the processing unit 802 is specifically configured to determine, in the terminal, an HARQ receiving entity corresponding to the TRP to quit according to the physical downlink control channel of the TRP.

Optionally, the physical downlink control channel of the joined TRP includes an identifier of a transmission HARQ process used when the TRP exits from transmitting target HARQ process data, and the target HARQ process data is obtained by analyzing HARQ retransmission data.

The processing unit 802 is further configured to, in the HARQ receiving entity corresponding to the TRP, determine a target receiving HARQ process that is the same as the identifier of the transmitting HARQ process used when the TRP transmits the target HARQ process data.

The receiving unit 801 is specifically configured to receive, through the target HARQ process, target HARQ process data transmitted by the HARQ transmitting entity corresponding to the imposed TRP.

Optionally, the processing unit 802 is further configured to determine, in the HARQ receiving entity corresponding to the imposed TRP, other receiving HARQ processes except the target receiving HARQ process.

The receiving unit 801 is further configured to receive HARQ process data of the imposed TRP through another received HARQ process.

Optionally, the data transmission apparatus further includes a sending unit 803.

The processing unit 802 is further configured to, if the target HARQ process data is retransmission data, cache the target HARQ process data in a cache region corresponding to the target receiving HARQ process; and if the target HARQ process data is newly transmitted data, clearing the cache region data corresponding to the target receiving HARQ process, and caching the target HARQ process data into the cache region corresponding to the target receiving HARQ process.

The processing unit 802 is further configured to perform decoding processing on the buffer corresponding to the target receiving HARQ process.

The sending unit 803 is further configured to send response information to the terminal according to the decoding processing result.

Optionally, the sending unit 803 is specifically configured to send a first message that the HARQ process is successful to the target of the franchised TRP if the decoding processing result indicates that the decoding is correct.

The processing unit 802 is further configured to release, according to the first message, buffer data corresponding to the target receiving HARQ process.

The receiving unit 801 is further configured to receive HARQ process data of the imposed TRP through the target reception HARQ process.

Optionally, the sending unit 803 is specifically configured to send a second message that the HARQ process failed to the target of the imposed TRP if the decoding processing result indicates a decoding error.

The receiving unit 801 is further configured to, if it is determined that the number of transmissions of the target HARQ process data is less than the maximum number of transmissions based on the second message, receive the data passing through the target HARQ process again through the target reception HARQ process until the number of transmissions of the target HARQ process data is greater than or equal to the maximum number of transmissions.

The processing unit 802 is further configured to release the buffer data corresponding to the target receiving HARQ process if it is determined that the number of transmissions of the target HARQ process data is greater than or equal to the maximum number of transmissions based on the second message.

The receiving unit 801 is further configured to receive HARQ process data of the imposed TRP through the target transmission HARQ process.

Optionally, the receiving unit 801 is further configured to receive identifiers of a plurality of TRPs to be detected, where the identifiers are sent by the master TRP.

The processing unit 802 is further configured to measure channel quality of the multiple TRPs to be measured according to the identifiers of the multiple TRPs to be detected, so as to obtain parameter information of the multiple TRPs to be measured; wherein all TRPs in a pre-configured set of TRPs are included in the plurality of TRPs to be measured.

A sending unit 803, configured to send parameter information of a plurality of TRPs to be measured to a master TRP; and the parameter information of the plurality of TRPs to be measured is used for the main TRP to determine a target TRP set according to the parameter information.

The data transmission apparatus 80 provided in this embodiment of the application can execute the technical solution of the data transmission method at the terminal side in any embodiment, and the implementation principle and the beneficial effect thereof are similar to those of the data transmission method at the terminal side, and reference may be made to the implementation principle and the beneficial effect of the data transmission method at the terminal side, which is not described herein again.

Fig. 9 is a schematic structural diagram of another data transmission device 90 according to an embodiment of the present application, for example, please refer to fig. 9, where the data transmission device 90 may include:

a receiving unit 901, configured to receive exit indication information sent by a master transmitting and receiving node TRP; the exit indication information is used for indicating the exit TRP to send hybrid automatic repeat request HARQ retransmission data exiting the TRP to the joining TRP.

A sending unit 902, configured to send the HARQ retransmission data to the franchised TRP through the HARQ sending entity corresponding to the quit TRP according to the quit indication information, and stop sending the HARQ retransmission data to the terminal, so as to send the HARQ retransmission data to the terminal through the HARQ sending entity corresponding to the franchised TRP.

The data transmission apparatus 90 provided in this embodiment of the application can implement the technical solution of the data transmission method exiting from the TRP side in any one of the embodiments, and the implementation principle and the beneficial effect thereof are similar to those of the data transmission method exiting from the TRP side, and reference may be made to the implementation principle and the beneficial effect of the data transmission method exiting from the TRP side, which is not described herein again.

Fig. 10 is a schematic structural diagram of a master transmission and reception node TRP100 according to an embodiment of the present application, for example, please refer to fig. 10, where the master transmission and reception node TRP100 may include a processor 1001 and a memory 1002; wherein,

a memory 1002 for storing a computer program.

The processor 1001 is configured to read the computer program stored in the memory 1002, and execute the technical scheme of the data transmission method on the main TRP side in any one of the embodiments according to the computer program in the memory 1002, which has similar implementation principles and beneficial effects to those of the data transmission method on the main TRP side, and for reference, the implementation principles and beneficial effects of the data transmission method on the main TRP side are not described herein again.

Fig. 11 is a schematic structural diagram of an affiliated wtru TRP110 according to an embodiment of the present application, for example, please refer to fig. 11, where the affiliated wtru TRP110 may include a processor 1101 and a memory 1102; wherein,

a memory 1102 for storing a computer program.

The processor 1101 is configured to read the computer program stored in the memory 1102, and execute the technical solution of the data transmission method on the franchised TRP side in any one of the embodiments according to the computer program in the memory 1102, where the implementation principle and the beneficial effect of the technical solution are similar to those of the data transmission method on the franchised TRP side, and reference may be made to the implementation principle and the beneficial effect of the data transmission method on the franchised TRP side, which is not described herein again.

Fig. 12 is a schematic structural diagram of a terminal 120 according to an embodiment of the present application, for example, please refer to fig. 12, where the terminal 120 may include a processor 1201 and a memory 1202; wherein,

a memory 1202 for storing a computer program.

The processor 1201 is configured to read the computer program stored in the memory 1202, and execute the technical scheme of the data transmission method of the terminal in any embodiment according to the computer program in the memory 1202, which has similar implementation principles and beneficial effects to those of the data transmission method at the terminal side, and reference may be made to the implementation principles and beneficial effects of the data transmission method at the terminal side, which are not described herein again.

Fig. 13 is a schematic structural diagram of a quitting sending and receiving node TRP130 according to an embodiment of the present application, for example, please refer to fig. 13, where the quitting sending and receiving node TRP130 may include a processor 1301 and a memory 1302; wherein,

a memory 1302 for storing a computer program.

The processor 1301 is configured to read the computer program stored in the memory 1302, and execute the technical solution of the data transmission method exiting from the TRP side in any one of the embodiments according to the computer program in the memory 1302, which has similar implementation principles and beneficial effects to those of the data transmission method exiting from the TRP side, and for reference, the implementation principles and beneficial effects of the data transmission method exiting from the TRP side are not described herein again.

The embodiment of the present application further provides a computer-readable storage medium, where a computer execution instruction is stored in the computer-readable storage medium, and when a processor executes the computer execution instruction, the data transmission method according to any of the above embodiments is implemented, and the implementation principle and the beneficial effect of the data transmission method are similar to those of the data transmission method, which can be referred to as the implementation principle and the beneficial effect of the data transmission method, and are not described herein again.

The embodiment of the present application further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the data transmission method according to any of the above embodiments is implemented, and the implementation principle and the beneficial effect of the computer program are similar to those of the data transmission method, which can be referred to as the implementation principle and the beneficial effect of the data transmission method, and are not described herein again.

An embodiment of the present application further provides a data transmission system, where the data transmission system may include: the implementation principle and the beneficial effect of the main sending and receiving node TRP according to any one of the embodiments, the franchised sending and receiving node TRP according to any one of the embodiments, the terminal according to any one of the embodiments, and the quitting sending and receiving node TRP according to any one of the embodiments are similar to those of the data transmission method, and reference may be made to the implementation principle and the beneficial effect of the data transmission method, and no further description is provided here.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts shown as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a TRP, etc.) or a processor (english: processor) to execute some steps of the methods according to the embodiments of the present application.

It should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.

The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc.

The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.

The computer-readable storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method of data transmission, comprising:

when determining that an exiting TRP exists in a sending and receiving node TRP set pre-configured for a terminal, determining a joining TRP of data to be transmitted for sending the exiting TRP in a target TRP set; wherein the franchised TRP does not belong to the pre-configured TRP set, the target TRP set does not comprise the quit TRP, and the data to be transmitted comprises hybrid automatic repeat request (HARQ) retransmission data;

sending exit indication information to the exit TRP; wherein the exit indication information is used for indicating the exit TRP to send the HARQ retransmission data to the joining TRP;

transmitting transmission indication information to the joining TRP; wherein, the transmission indication information is used for indicating the HARQ sending entity corresponding to the joining TRP to send the HARQ retransmission data;

2. The method of claim 1, further comprising:

3. The method of claim 1, wherein the determining an affiliate TRP of data to be transmitted for transmitting the exit TRP in a target TRP set comprises:

comparing the target set of TRPs with the preconfigured set of TRPs, determining TRPs in the target set of TRPs that do not belong to the preconfigured set of TRPs;

4. The method according to any one of claims 1-3, further comprising:

determining, among the preconfigured set of TRPs, TRPs that do not belong to the target set of TRPs;

determining the TRP not belonging to the target TRP set as the exit TRP.

5. The method according to any one of claims 1-3, further comprising:

receiving channel quality measurement results of a plurality of TRPs to be measured sent by the terminal; wherein all TRPs and at least one other TRP of the pre-configured set of TRPs are included in the plurality of TRPs to be measured;

6. The method according to any one of claims 1-3, further comprising:

judging whether the target TRP set comprises a main TRP or not;

7. The method of claim 6, further comprising:

if the main TRP is not included, determining the TRP with the best channel quality in the target TRP set;

8. A method of data transmission, comprising:

receiving transmission indication information sent by a main sending and receiving node TRP; the transmission indication information is used for indicating the joining TRP in the target TRP set to send data to be transmitted which quits the TRP; the joining TRP is determined when the exiting TRP exists in a TRP set pre-configured for a terminal, the joining TRP does not belong to the pre-configured TRP set, the exiting TRP is not included in the target TRP set, and the data to be transmitted comprises hybrid automatic repeat request (HARQ) retransmission data;

receiving the HARQ retransmission data sent by the exiting TRP;

9. The method of claim 8, wherein the transmitting the HARQ retransmission data to the terminal through the HARQ transmitting entity corresponding to the imposed TRP comprises:

analyzing the HARQ retransmission data to obtain packet header information and target HARQ process data corresponding to the quit TRP;

10. The method as claimed in claim 9, wherein the packet header information includes an identifier of a transmission HARQ process used when the target HARQ process data is transmitted by the drop TRP, and the transmitting the target HARQ process data to the terminal through the HARQ transmitting entity corresponding to the franchised TRP based on the packet header information includes:

determining a target transmission HARQ process which is the same as the identification of the transmission HARQ process used when the quit TRP transmits the target HARQ process data in the HARQ transmission entity corresponding to the franchised TRP;

11. The method of claim 10,

and the target transmission HARQ process is used for transmitting the target HARQ process data according to the physical downlink control channel of the franchised TRP.

12. The method of claim 10, further comprising:

13. The method of claim 10, further comprising:

receiving a first message that the target transmission HARQ process is successful and sent by the terminal;

14. The method of claim 10, further comprising:

receiving a second message of target transmission HARQ process failure sent by the terminal;

if the transmission times of the target HARQ process data are determined to be less than the maximum transmission times based on the second message, the target HARQ process data are sent to the terminal through the target sending HARQ process again until the transmission times of the target HARQ process data are greater than or equal to the maximum transmission times;

15. The method according to any of claims 8-14, wherein the data to be transmitted comprises higher layer data to be transmitted, the method further comprising:

16. The method according to any one of claims 10-14, further comprising:

17. A method of data transmission, comprising:

receiving configuration information sent by a main sending and receiving node TRP;

determining an exiting TRP in a TRP set pre-configured for a terminal according to the configuration information, and determining a joining TRP for sending data to be transmitted of the exiting TRP in a target TRP set; wherein the franchised TRP does not belong to the pre-configured TRP set, the target TRP set does not comprise the quit TRP, and the data to be transmitted comprises hybrid automatic repeat request (HARQ) retransmission data;

determining a HARQ receiving entity corresponding to the exiting TRP in the terminal; the HARQ receiving entity corresponding to the TRP quitting can be used for receiving the HARQ process data of the joining TRP;

18. The method of claim 17, further comprising:

19. The method of claim 17,

and the HARQ receiving entity corresponding to the TRP quits receives the HARQ retransmission data according to the physical downlink control channel of the joining TRP.

20. The method of claim 17, wherein the determining, in the terminal, the HARQ receiving entity corresponding to the exited TRP comprises:

receiving a physical downlink control channel of the joining TRP sent by a HARQ sending entity corresponding to the joining TRP;

21. The method according to claim 10, wherein the physical downlink control channel of the joining TRP includes an identifier of a transmission HARQ process used when the withdrawing TRP transmits target HARQ process data, and the target HARQ process data is obtained by parsing the HARQ retransmission data;

determining a target receiving HARQ process which is the same as the identification of the sending HARQ process used when the quit TRP sends the target HARQ process data in the HARQ receiving entity corresponding to the quit TRP;

22. The method of claim 21, further comprising:

determining other receiving HARQ processes except the target receiving HARQ process in the HARQ receiving entity corresponding to the joining TRP;

23. The method of claim 21, further comprising:

if the target HARQ process data is retransmission data, caching the target HARQ process data into a cache region corresponding to the target receiving HARQ process; if the target HARQ process data is newly transmitted data, clearing cache region data corresponding to the target receiving HARQ process, and caching the target HARQ process data into the cache region corresponding to the target receiving HARQ process;

decoding the cache region corresponding to the target receiving HARQ process;

24. The method according to claim 23, wherein said sending response information to the terminal according to the decoding processing result comprises:

if the decoding processing result indicates that the decoding is correct, sending a first message that the target sending HARQ process is successful to the joining TRP;

25. The method of claim 23, further comprising:

if the decoding processing result indicates that the decoding is wrong, sending a second message that the target sending HARQ process fails to the joining TRP;

if the transmission times of the target HARQ process data are determined to be less than the maximum transmission times based on the second message, receiving the target HARQ process data through the target receiving HARQ process again until the transmission times of the target HARQ process data are greater than or equal to the maximum transmission times;

26. The method according to any one of claims 17-25, further comprising:

receiving the identifications of a plurality of TRPs to be detected sent by a main TRP;

measuring the channel quality of the TRPs to be measured according to the identifiers of the TRPs to be measured to obtain parameter information of the TRPs to be measured; wherein all TRPs in the pre-configured set of TRPs are included in the plurality of TRPs to be measured;

27. A method of data transmission, comprising:

receiving exit indication information sent by a main sending and receiving node TRP; the exit indication information is used for indicating the exit TRP to send hybrid automatic repeat request (HARQ) retransmission data of the exit TRP to an affiliate TRP;

28. A data transmission apparatus, comprising:

the processing unit is used for determining a joining TRP of data to be transmitted for sending the withdrawing TRP in a target TRP set when the withdrawing TRP exists in a sending and receiving node TRP set pre-configured for a terminal; wherein the franchised TRP does not belong to the pre-configured TRP set, the target TRP set does not comprise the quit TRP, and the data to be transmitted comprises hybrid automatic repeat request (HARQ) retransmission data;

a sending unit, configured to send exit indication information to the exit TRP; wherein the exit indication information is used for indicating the exit TRP to send the HARQ retransmission data to the joining TRP;

the sending unit is further used for sending transmission indication information to the joining TRP; wherein, the transmission indication information is used for indicating the HARQ sending entity corresponding to the joining TRP to send the HARQ retransmission data;

29. A data transmission apparatus, comprising:

the receiving unit is used for receiving the transmission indication information sent by the main sending and receiving node TRP; the transmission indication information is used for indicating the joining TRP in the target TRP set to send data to be transmitted which quits the TRP; the joining TRP is determined when the exiting TRP exists in a TRP set pre-configured for a terminal, the joining TRP does not belong to the pre-configured TRP set, the exiting TRP is not included in the target TRP set, and the data to be transmitted comprises hybrid automatic repeat request (HARQ) retransmission data;

the receiving unit is further configured to receive the HARQ retransmission data sent by the exiting TRP;

30. A data transmission apparatus, comprising:

the receiving unit is used for receiving the configuration information sent by the main sending and receiving node TRP;

the processing unit is used for determining an exit TRP in a TRP set pre-configured for the terminal according to the configuration information, and determining a joining TRP for sending data to be transmitted of the exit TRP in a target TRP set; wherein the franchised TRP does not belong to the pre-configured TRP set, the target TRP set does not comprise the quit TRP, and the data to be transmitted comprises hybrid automatic repeat request (HARQ) retransmission data;

the processing unit is further configured to determine, in the terminal, an HARQ receiving entity corresponding to the exiting TRP; the HARQ receiving entity corresponding to the TRP quitting can be used for receiving the HARQ process data of the joining TRP;

31. A data transmission apparatus, comprising:

the receiving unit is used for receiving quitting indication information sent by a main sending and receiving node TRP; the exit indication information is used for indicating the exit TRP to send hybrid automatic repeat request (HARQ) retransmission data of the exit TRP to an affiliate TRP;

32. A primary transmitting and receiving node, TRP, comprising a processor and a memory; wherein,

the memory for storing a computer program;

the processor is used for reading the computer program stored in the memory and executing the data transmission method of any one of the claims 1 to 7 according to the computer program in the memory.

33. A franchise sending and receiving node TRP is characterized by comprising a processor and a memory; wherein,

the memory for storing a computer program;

the processor is configured to read the computer program stored in the memory, and execute the data transmission method according to any one of the claims 8 to 16 according to the computer program in the memory.

34. A terminal comprising a processor and a memory; wherein,

the memory for storing a computer program;

the processor is configured to read the computer program stored in the memory, and execute the data transmission method according to any one of claims 17 to 26 according to the computer program in the memory.

35. A TRP exiting a sending and receiving node is characterized by comprising a processor and a memory; wherein,

the memory for storing a computer program;

the processor is configured to read the computer program stored in the memory, and execute the data transmission method according to claim 27 according to the computer program in the memory.

36. A computer-readable storage medium having computer-executable instructions stored thereon, which, when executed by a processor, implement the data transmission method of any one of claims 1 to 7, or the data transmission method of any one of claims 8 to 16, or the data transmission method of any one of claims 17 to 26, or the data transmission method of claim 27.

37. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, carries out the data transmission method of any one of the preceding claims 1 to 7, or the data transmission method of any one of the preceding claims 8 to 16, or the data transmission method of any one of the preceding claims 17 to 26, or the data transmission method of claim 27.

38. A data transmission system, comprising:

a master transceiver node TRP according to claim 32, an affiliated transceiver node TRP according to claim 33, a terminal according to claim 34, and a quit transceiver node TRP according to claim 35.