WO2020083251A1

WO2020083251A1 - Data transmission method and apparatus

Info

Publication number: WO2020083251A1
Application number: PCT/CN2019/112351
Authority: WO
Inventors: 王建国; 曲秉玉; 周永行
Original assignee: 华为技术有限公司
Priority date: 2018-10-22
Filing date: 2019-10-21
Publication date: 2020-04-30
Also published as: CN111083791A; CN111083791B

Abstract

The present application provides a data transmission method and apparatus. A terminal device determines, according to first indication information, the position of a PDCCH actually transmitted by a network device during an initial transmission, and determines, according to the position of the PDCCH actually transmitted by the network device and the position of an initially transmitted PDCCH actually received by the terminal device, whether a false alarm has occurred in the PDCCH. Alternatively, the terminal device determines, according to the first indication information, that the network device has not transmitted an initially transmitted PDCCH or PDSCH to the terminal device. In the process, the terminal device is capable of determining, according to the first indication information, whether a false alarm has occurred in the PDCCH. If it is determined that no false alarm has occurred, the initially transmitted PDSCH and a retransmitted PDSCH can be combined, so as to acquire a combination gain. If it is determined that a false alarm has occurred on the initially transmitted PDSCH, a load is directly acquired by means of a retransmitted PDSCH, thereby preventing an actual initially transmitted PDSCH that has been incorrectly received by the terminal device from "contaminating" the received retransmitted PDSCH, and effectively improving the reliability of data transmission by means of PDSCH combination.

Description

Data transmission method and device

This application requires the priority of the Chinese patent application filed on October 22, 2018, with the application number 2018112310045 and the application name "Data Transmission Method and Device", the entire contents of which are incorporated by reference in this application.

Technical field

This application relates to the field of communication technology, and in particular, to a data transmission method and device.

Background technique

In a long term evolution (LTE) system, network devices can send physical downlink shared channels (PDSCH) to terminal devices through dynamic scheduling or semi-persistent scheduling (SPS). In the fifth generation mobile communication technology (the Fifth-generation, 5G) new radio (NR) system, the network device uses a similar mechanism to send PDSCH to the terminal device.

In the dynamic scheduling method, the network device sends a physical downlink control channel (PDCCH) carrying downlink control information (downlink control information, DCI) to the terminal device. After receiving the PDCCH, the terminal device verifies whether the DCI can pass the cyclic redundancy check (CRC). If the DCI passes the CRC check, the terminal device receives the PDSCH according to the DCI; otherwise, the terminal device thinks that there is no PDSCH to receive. In the semi-persistent scheduling method, network devices use cell radio network temporary identification (cell radio network temporary identity, C-RNTI) or configured radio network temporary identification (configured scheduling--radio network temporary identification, CS-RNTI) scrambling. The PDCCH specifies the radio resource used by the PDSCH for the terminal device, which is hereinafter referred to as SPS resource. Every time a period passes, the terminal device will use the SPS resource to receive the PDSCH. In this way, the network device does not need to send the PDCCH to the terminal device every time before sending the PDSCH, so as to indicate the terminal device to receive PDSCH resources.

After the network device sends the PDSCH (hereinafter referred to as the PDSCH for initial transmission) to the terminal device for the first time through dynamic scheduling or semi-persistent scheduling, the terminal device receives and checks whether the PDSCH for the initial transmission can pass the CRC check: if it is verified If successful, the terminal device sends an acknowledgement (ACKnowledge, ACK) to the network device; if the verification fails, the terminal device sends a negative acknowledgement (NACK) to the network device and caches the PDSCH for the initial transmission. If the network device receives the NACK, the network device determines the retransmitted PDSCH, and sends the retransmitted PDSCH and the PDCCH carrying DCI to the terminal device. The terminal device will receive the PDCCH and receive the retransmitted PDSCH based on the DCI carried by the PDCCH. After receiving the retransmitted PDSCH, the terminal device merges the initially transmitted PDSCH and the retransmitted PDSCH. After that, the terminal device determines whether the combined PDSCH can pass the CRC check. If the combined PDSCH can pass the CRC check, the terminal device will send an ACK to the network device, otherwise, the terminal device sends a NACK to the network device. If the terminal device still fails to receive the PDSCH correctly after the first retransmission (that is, the combined PDSCH still fails the CRC check), the terminal device continues to send NACK to the network device to start the next retransmission and merge. The terminal device and the network device can perform multiple retransmissions, such as 1 to 4 times. Whether retransmission is required and the number of retransmissions depend on the network equipment.

In the above dynamic scheduling or semi-persistent scheduling mode, due to the limited length of the CRC, even if the DCI received by the terminal device through monitoring the PDCCH passes the CRC check, there may be errors in the DCI. This phenomenon is called a PDCCH false alarm. When a PDCCH false alarm occurs, if the DCI error, such as part or all of the resource information or transmission format used by the PDSCH indicated by the DCI, is incorrect, the terminal device cannot correctly receive the PDSCH for the initial transmission. At this time, the terminal device will cache the initial transmission. PDSCH in preparation for merging with the PDSCH to be retransmitted thereafter. However, the erroneous DCI information will cause the terminal device to cache the wrong PDSCH for the initial transmission, and then cause the PDSCH for the initial transmission to "pollute" the retransmitted PDSCH, resulting in the terminal device still not receiving the PDSCH correctly after multiple retransmissions. Therefore, when retransmission occurs, how to prevent the PDSCH of the initial transmission from "polluting" the PDSCH of the retransmission, so as to effectively use the combination of the PDSCH to improve the reliability of data transmission, is an urgent problem to be solved.

Summary of the invention

The present application provides a data transmission method and device to prevent the initial transmission of physical channels from polluting the retransmitted physical channels, and to achieve the purpose of effectively using the combination of physical channels to improve the reliability of data transmission.

In a first aspect, an embodiment of the present application provides a data transmission method, which can be applied to a terminal device or a chip in the terminal device. The method is suitable for dynamic scheduling or semi-persistent scheduling. The method is described below by taking an example of application to a terminal device. The method includes: receiving a first physical downlink control channel PDCCH sent by a network device, where the first PDCCH carries downlink control information DCI, the DCI includes scheduling information for scheduling the first physical downlink shared channel PDSCH and first indication information, where the first indication information is used to indicate the position of the second PDCCH scheduling the second PDSCH in the candidate PDCCH set, or, The first indication information is used to indicate that the network device does not send the second PDCCH or the second PDSCH to the terminal device, and the first PDSCH and the second PDSCH carry the same load; receiving the first PDSCH sent by the network device according to the scheduling information; The first indication information and the first PDSCH determine the load. With this solution, the terminal device can determine whether a PDCCH false alarm has occurred according to the first indication information. If it is determined that no false alarm has occurred, the PDSCH of the initial transmission and the PDSCH of the retransmission can be merged to obtain a merger gain; When a false alarm occurs in the PDCCH transmission, the retransmission PDSCH is used directly to obtain the load, so as to avoid the "pollution" of the PDSCH received by the terminal device from the erroneous reception of the initial transmission PDSCH, so as to realize the effective use of PDSCH and improve the reliability of data transmission. the goal of.

In a feasible design, before receiving the first PDSCH sent by the network device according to the scheduling information, the terminal device also receives a third PDCCH sent by the network device for scheduling the third PDSCH; receiving the third PDSCH according to the third PDCCH; According to the first indication information, determine whether the positions of the second PDCCH and the third PDCCH in the candidate PDCCH set are the same; if the positions of the third PDCCH and the second PDCCH in the candidate PDCCH set are the same, according to the first PDSCH and the third PDSCH Determine the load; if the positions of the third PDCCH and the second PDCCH in the candidate PDCCH set are different, determine the load according to the first PDSCH. With this solution, before receiving the first PDSCH, the terminal device receives the third PDSCH, determines whether a PDCCH false alarm has occurred according to the first indication information, and then determines whether it is necessary to combine the PDSCH of the initial transmission and the PDSCH of the retransmission, thereby avoiding The PDSCH of the initial transmission "contaminates" the PDSCH of the retransmission, so as to effectively utilize the combination of the PDSCH to improve the reliability of data transmission.

In a feasible design, when the terminal device determines the load according to the first indication information and the first PDSCH, it is determined whether the first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to the terminal device; The indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, and then the load is determined according to the first PDSCH. With this scheme, during the initial transmission, if the network device does not send the second PDCCH or the second PDSCH to the terminal device, during the retransmission process, the network device sends the first indication contained in the DCI carried by the first PDCCH to the terminal device The information indicates to the terminal device that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, so that the terminal device determines that a PDCCH false alarm occurs without combining the third PDSCH and the first PDSCH according to the first indication information, thereby avoiding the initial transmission The PDSCH "contaminates" the retransmitted PDSCH to achieve the purpose of effectively using the PDSCH combination to improve the reliability of data transmission.

In a feasible design, after the terminal device determines the load according to the first indication information and the first PDSCH, it also determines whether the load passes the CRC check; if the load passes the CRC check, the terminal device indicates the load according to the second indication information. A positive response is sent to the network device on the resource; if the payload fails the CRC check, the terminal device sends a negative response to the network device on the resource indicated by the second indication information; where the second indication information is carried in the first PDCCH . With this solution, after determining the load, the terminal device determines whether the load can pass the CRC check, and then sends response information to the network device on the response resource indicated by the second indication information carried in the first PDCCH according to the verification result. data transmission.

In a second aspect, an embodiment of the present application provides a data transmission method, which can be applied to a network device or a chip in the network device. This method is suitable for dynamic scheduling or semi-persistent scheduling. The method will be described as an example of applying to a network device. The method includes: sending a first physical downlink control channel PDCCH to a terminal device, the first PDCCH carrying downlink control information DCI , The DCI includes scheduling information for scheduling the first physical downlink shared channel PDSCH and first indication information, the first indication information is used to indicate the position of the second PDCCH scheduling the second PDSCH in the candidate PDCCH set, or, the The first indication information is used to indicate that the network device does not send the second PDCCH or the second PDSCH to the terminal device, and the first PDSCH and the second PDSCH carry the same load; the network device sends the first PDSCH scheduled by the scheduling information to the terminal device. With this solution, the network device sends first indication information to the terminal device, so that the terminal device can determine whether a PDCCH false alarm has occurred according to the first indication information. If it is determined that no false alarm has occurred, the PDSCH and retransmission of the initial transmission can be combined The PDSCH is transmitted to obtain a merger gain; if it is determined that a false alarm occurs in the initial transmission PDCCH, the retransmission PDSCH is directly used to obtain the load to avoid the terminal device actually receiving the initial transmission PDSCH erroneously causing "pollution" to the received retransmission PDSCH, Therefore, the purpose of effectively utilizing the combination of PDSCH to improve the reliability of data transmission is achieved.

In a feasible design, when the first indication information is used to indicate the position of the second PDCCH scheduling the second PDSCH in the candidate PDCCH set, the network device also sends the first PDSCH to the terminal device according to the scheduling information before sending the first PDSCH to the terminal device. Send a second PDCCH for scheduling the second PDSCH; send the second PDSCH to the terminal device according to the second PDCCH. With this solution, before sending the first PDSCH, the network device also sends the second PDCCH and the second PDSCH to the terminal device, so as to achieve the purpose of sending the initially transmitted PDSCH to the terminal device.

In a feasible design, when the first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, the first indication information indicates that the network device has not sent the second PDCCH or the second Two PDSCH. With this scheme, during the initial transmission, if the network device does not send the second PDCCH or the second PDSCH to the terminal device, during the retransmission process, the network device sends the first indication contained in the DCI carried by the first PDCCH to the terminal device The information indicates to the terminal device that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, so that the terminal device determines that a PDCCH false alarm occurs without combining the third PDSCH and the first PDSCH according to the first indication information, thereby avoiding the initial transmission The PDSCH "contaminates" the retransmitted PDSCH to achieve the purpose of effectively using the PDSCH combination to improve the reliability of data transmission.

In a feasible design, after the network device sends the first PDSCH to the terminal device according to the scheduling information, it also receives a positive response or a negative response sent by the terminal device on the resource indicated by the second indication information, where the second indication information Carried in the first PDCCH. With this solution, after determining the load, the terminal device determines whether the load can pass the CRC check, and then sends response information to the network device on the response resource indicated by the second indication information carried in the first PDCCH according to the verification result. data transmission.

In a third aspect, an embodiment of the present application provides a data transmission method, which can be applied to a terminal device or a chip in the terminal device. This method is suitable for data transmission based on blind detection. The method will be described below by taking an example of application to a terminal device. The method includes: receiving a first physical downlink control channel PDCCH sent by a network device, where the first PDCCH carries downlink control information DCI, the DCI includes scheduling information for scheduling the first physical downlink shared channel PDSCH and first indication information, the first indication information is used to indicate the position of the first physical channel in the set of candidate physical channels, or the first The indication information is used to indicate that the network device does not send the first physical channel to the terminal device, the first PDSCH and the first physical channel carry the same load; receive the first PDSCH sent by the network device according to the scheduling information; according to the first The indication information and the first PDSCH determine the load. With this solution, the terminal device can determine whether physical channel detection or false alarms have occurred based on the first indication information, and then determine whether it is necessary to combine the first physical channel and the first PDSCH that were initially transmitted. If no false alarms have occurred, Then, the first physical channel and the first PDSCH that are initially transmitted are combined and received. Since the first PDSCH carries the redundant version of the retransmission corresponding to the load of the first physical channel, the combined gain can be effectively used to improve data transmission Reliability; if a false alarm occurs, because the first PDSCH actually carries the redundant version of the retransmission corresponding to the load of the first physical channel, the load can be obtained directly from the first PDSCH, thereby avoiding the first transmission The physical channel "contaminates" the first PDCSH to achieve the purpose of effectively using the combination of physical channels to improve the reliability of data transmission and reduce the delay.

In a feasible design, before the terminal device receives the first PDSCH sent by the network device according to the scheduling information, it further includes receiving a second physical channel sent by the network device; the terminal device determines the load according to the first indication information and the first PDSCH Is based on the first indication information to determine whether the first physical channel and the second physical channel are in the same position in the candidate physical channel set; if the first physical channel and the second physical channel are in the same position in the candidate physical channel set , The load is determined according to the first PDSCH and the second physical channel; if the positions of the first physical channel and the second physical channel in the set of candidate physical channels are different, the load is determined according to the first PDSCH. With this scheme, before receiving the first PDSCH, the terminal device receives the second object channel, determines whether physical channel detection or false alarm has occurred according to the first indication information, and then determines whether it is necessary to combine the physical channel and the first channel of the initial transmission. A PDSCH, so as to avoid the “contamination” of the erroneously received initial transmission physical channel for retransmitting the first PDSCH with the same payload, and to achieve the purpose of effectively using the combination of physical channels to improve the reliability of data transmission.

In a feasible design, the terminal device receives the second physical channel sent by the network device, specifically to determine whether there is a candidate physical channel in the set of candidate physical channels that can pass the CRC check of the cyclic redundancy check code, and the candidate physical channel The payload of the candidate physical channels in the set contains transport blocks and control information, which is used to indicate the resources used by the terminal device to send the response information; if there is a candidate physical channel in the candidate physical channel set that can pass the CRC check, The candidate physical channel that can pass the CRC check is used as the second physical channel, and a positive response is sent to the network device; if there is no candidate physical channel that can pass the CRC check in the set of candidate physical channels, the candidate physical channel is cached M candidate physical channels in the channel set, M ≥ 0 and an integer. With this solution, the terminal device receives the second physical channel.

In a feasible design, if the first physical channel and the second physical channel are in the same position in the candidate physical channel set, when determining the load according to the first PDSCH and the second candidate physical channel, if the first physical channel and One candidate physical channel among the cached M candidate physical channels has the same position in the set of candidate physical channels, then the candidate physical channel having the same position as the first physical channel among the M candidate physical channels is used as the second physical channel; The first PDSCH and the second physical channel determine the load. With this solution, the terminal device determines the load according to the cached M candidate physical channels and the first indication information.

In a feasible design, M is predefined; or, M is configured by the network device for the terminal device through high-level signaling. With this scheme, the purpose of determining M is achieved.

In a feasible design, if there is no candidate physical channel that can pass the CRC check in the candidate physical channel set, the terminal device caches at least M candidate physical channels from the candidate physical channel set according to the autocorrelation threshold. M candidate physical channels are determined and cached. With this solution, the terminal device determines and buffers M candidate physical channels from the set of candidate physical channels.

In a feasible design, the terminal device determining the load according to the first indication information and the first PDSCH includes: determining whether the first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, if the first The indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, and then the load is determined according to the first PDSCH. With this scheme, during the initial transmission, if the network device does not send the first physical channel to the terminal device, during the retransmission process, the network device sends the first indication information contained in the DCI carried by the first PDCCH to the terminal device to the terminal device. The device indicates that the network device has not sent the first physical channel to the terminal device, so that the terminal device determines that physical channel detection or false alarm occurs without merging the second physical channel and the first PDSCH according to the first indication information, thereby avoiding the initial transmission The physical channel "pollution" is used to retransmit the first PDSCH of the same payload, so as to effectively utilize the combination of physical channels to improve the reliability of data transmission.

In a feasible design, after determining the load according to the first indication information and the first PDSCH, the terminal device also determines whether the load passes the CRC check; if the load passes the CRC check, it is indicated in the second indication information. A positive response is sent to the network device on the resource; if the load fails the CRC check, a negative response is sent to the network device on the resource indicated by the second indication information; where the second indication information is carried in the first PDCCH. With this solution, after determining the load, the terminal device determines whether the load can pass the CRC check, and then sends response information to the network device on the response resource indicated by the second indication information carried in the first PDCCH according to the verification result. data transmission.

According to a fourth aspect, an embodiment of the present application provides a data transmission method, which can be applied to a network device or a chip in the network device. This method is suitable for data transmission based on blind detection. The method will be described below using network equipment as an example. The method includes: sending a first physical downlink control channel PDCCH to a terminal device, the first PDCCH carrying downlink control information DCI , The DCI includes scheduling information for scheduling the first physical downlink shared channel PDSCH and first indication information, the first indication information is used to indicate the position of the first physical channel in the set of candidate physical channels, or the first indication The information is used to indicate that the network device does not send the first physical channel to the terminal device, the first PDSCH and the first physical channel carry the same load; and send the first PDSCH to the terminal device according to the scheduling information. With this solution, the terminal device can determine whether physical channel detection or false alarms have occurred based on the first indication information, and then determine whether it is necessary to combine the first physical channel and the first PDSCH that were initially transmitted. If no false alarms have occurred, Then, the first physical channel and the first PDSCH that are initially transmitted are combined and received. Since the first PDSCH carries the redundant version of the retransmission corresponding to the load of the first physical channel, the combined gain can be effectively used to improve data transmission Reliability; if a false alarm occurs, because the first PDSCH actually carries the redundant version of the retransmission corresponding to the load of the first physical channel, the load can be obtained directly from the first PDSCH, thereby avoiding the first transmission The physical channel "contaminates" the first PDCSH to achieve the purpose of effectively using the combination of physical channels to improve the reliability of data transmission and reduce the delay.

In a feasible design, when the first indication information is used to indicate the position of the first physical channel in the set of candidate physical channels, the network device sends the first PDSCH to the terminal device according to the scheduling information before sending the first PDSCH to the terminal device. Physical channel. With this solution, the network device sends the first physical channel of the initial transmission to the terminal device.

In a feasible design, after the network device sends the first PDSCH to the terminal device according to the scheduling information, it also receives a positive response or a negative response sent by the terminal device on the resource indicated by the second indication information, where the second indication information carries In the first PDCCH. With this solution, after determining the load, the terminal device determines whether the load can pass the CRC check, and then sends response information to the network device on the response resource indicated by the second indication information carried in the first PDCCH according to the verification result. data transmission.

According to a fifth aspect, an embodiment of the present application provides a data transmission device, which may be a terminal device or a chip in the terminal device. The device may include a processing unit and a transceiver unit. When the apparatus is a terminal device, the processing unit may be a processor, and the transceiving unit may be a transceiver; the terminal device may further include a storage unit, the storage unit may be a memory; the storage unit is used to store instructions, the processing The unit executes the instructions stored in the storage unit, so that the terminal device implements the above-mentioned first aspect or functions in various possible implementation manners of the first aspect. When the device is a chip in a terminal device, the processing unit may be a processor, and the transceiver unit may be an input / output interface, a pin, or a circuit, etc .; the processing unit executes instructions stored in the storage unit to enable the terminal The device implements the functions in the above first aspect or various possible implementation manners of the first aspect. The storage unit may be a storage unit (for example, a register, a cache, etc.) in the chip, or may be located in the terminal device. The storage unit outside the chip (for example, read-only memory, random access memory, etc.).

According to a sixth aspect, an embodiment of the present application provides a data transmission device. The device may be a network device or a chip in the network device. The device may include a processing unit and a transceiver unit. When the apparatus is a network device, the processing unit may be a processor, and the transceiving unit may be a transceiver; the network device may further include a storage unit, which may be a memory; the storage unit is used to store instructions, the processing The unit executes the instructions stored by the storage unit, so that the network device implements the above-mentioned second aspect or functions in various possible implementation manners of the second aspect. When the device is a chip in a network device, the processing unit may be a processor, and the transceiver unit may be an input / output interface, a pin, or a circuit, etc .; the processing unit executes instructions stored in the storage unit to enable the network The device implements the functions in the second aspect or various possible implementation manners of the second aspect, and the storage unit may be a storage unit (for example, a register, a cache, etc.) in the chip, or may be located in the network device. The storage unit outside the chip (for example, read-only memory, random access memory, etc.).

According to a seventh aspect, an embodiment of the present application provides a data transmission device. The device may be a terminal device or a chip in the terminal device. The device may include a processing unit and a transceiver unit. When the apparatus is a terminal device, the processing unit may be a processor, and the transceiving unit may be a transceiver; the terminal device may further include a storage unit, the storage unit may be a memory; the storage unit is used to store instructions, the processing The unit executes the instructions stored by the storage unit, so that the terminal device implements the above-mentioned third aspect or functions in various possible implementation manners of the third aspect. When the device is a chip in a terminal device, the processing unit may be a processor, and the transceiver unit may be an input / output interface, a pin, or a circuit, etc .; the processing unit executes instructions stored in the storage unit to enable the terminal The device implements the functions in the third aspect or various possible implementation manners of the third aspect, and the storage unit may be a storage unit (for example, a register, a cache, etc.) in the chip, or may be located in the terminal device. The storage unit outside the chip (for example, read-only memory, random access memory, etc.).

In an eighth aspect, an embodiment of the present application provides a data transmission apparatus, which may be a network device or a chip in the network device. The device may include a processing unit and a transceiver unit. When the apparatus is a network device, the processing unit may be a processor, and the transceiving unit may be a transceiver; the network device may further include a storage unit, which may be a memory; the storage unit is used to store instructions, the processing The unit executes the instructions stored by the storage unit, so that the network device implements the above-mentioned fourth aspect or functions in various possible implementation manners of the fourth aspect. When the device is a chip in a network device, the processing unit may be a processor, and the transceiver unit may be an input / output interface, a pin, or a circuit, etc .; the processing unit executes instructions stored in the storage unit to enable the network The device implements the functions in the fourth aspect or various possible implementation manners of the fourth aspect, and the storage unit may be a storage unit (for example, a register, a cache, etc.) in the chip, or may be located in the network device. The storage unit outside the chip (for example, read-only memory, random access memory, etc.).

According to a ninth aspect, an embodiment of the present application provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the method in the foregoing first aspect or various possible implementation manners of the first aspect.

According to a tenth aspect, an embodiment of the present application provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the method in the second aspect or various possible implementation manners of the second aspect.

According to an eleventh aspect, an embodiment of the present application provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the method in the third aspect or various possible implementation manners of the third aspect.

According to a twelfth aspect, an embodiment of the present application provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the method in the fourth aspect or various possible implementation manners of the fourth aspect.

According to a thirteenth aspect, an embodiment of the present application provides a computer-readable storage medium that stores instructions, which when executed on a computer, causes the computer to execute the first aspect or each of the first aspect In a possible implementation.

According to a fourteenth aspect, an embodiment of the present application provides a computer-readable storage medium having instructions stored therein, which when executed on a computer, causes the computer to execute the above-mentioned second aspect or each of the second aspects In a possible implementation.

According to a fifteenth aspect, an embodiment of the present application provides a computer-readable storage medium having instructions stored therein, which when executed on a computer, causes the computer to execute the third aspect or each of the third aspects In a possible implementation.

According to a sixteenth aspect, an embodiment of the present application provides a computer-readable storage medium that stores instructions that, when run on a computer, cause the computer to perform the fourth aspect or each of the fourth aspects In a possible implementation.

In the data transmission method and apparatus provided in the embodiments of the present application, during the retransmission process, the network device sends the first PDCCH carrying the first indication information to the terminal device; correspondingly, the terminal device receives the first PDCCH, and according to the first PDCCH The first indication information contained in the DCI determines the position of the PDCCH actually sent by the network device during the initial transmission, and then determines whether the PDCCH has a false alarm according to the position of the PDCCH actually sent by the network device and the position of the PDCCH actually received by the terminal device . Or, the terminal device determines that the network device does not actually send the initially transmitted PDCCH or PDSCH to the terminal device according to the first indication information. In this process, the terminal device can determine whether a PDCCH false alarm has occurred according to the first indication information. If it is determined that no false alarm has occurred, the PDSCH of the initial transmission and the PDSCH of the retransmission can be merged to obtain the merged gain; if the initial transmission is determined; If a false alarm occurs on the PDCCH, the retransmission PDSCH is used directly to obtain the load, so as to avoid the "pollution" of the initial transmission PDSCH received by the terminal device by the erroneous reception of the received retransmission PDSCH, so as to effectively use the combination of PDSCH to improve the reliability of data transmission. purpose.

BRIEF DESCRIPTION

FIG. 1 is a schematic diagram of a process of erroneously received PDSCH that is erroneously received when a PDCCH false alarm pollutes a retransmitted PDSCH;

2 is a schematic diagram of a communication system architecture to which the communication method provided by an embodiment of the present application is applicable;

3 is a flowchart of a data transmission method provided by an embodiment of the present application;

4 is a schematic diagram of a PDSCH process of the first physical channel pollution retransmission that is initially transmitted when a physical channel detects a false alarm;

5 is a flowchart of another data transmission method provided by an embodiment of the present application;

6 is a schematic diagram of a process of initial transmission and retransmission in a data transmission process based on blind detection provided by an embodiment of the present application;

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

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

9 is a schematic structural diagram of yet another data transmission device provided by an embodiment of the present application;

10 is a schematic structural diagram of yet another data transmission device provided by an embodiment of the present application;

11 is a schematic structural diagram of a data transmission device according to another embodiment of the present application;

12 is a schematic structural diagram of yet another data transmission device according to an embodiment of the present application.

detailed description

In the dynamic scheduling mode, the network device sends a PDCCH carrying DCI to the terminal device, and the DCI is used to indicate to the terminal device the downlink control of the PDSCH resource location, transmission format (such as modulation and coding method, number of transmission layers, etc.) and response resources, etc. Information, the response resource is a resource used by the terminal device to send response information to the network device, and the response information includes ACK, NACK, and so on. After receiving the PDCCH, the terminal device verifies whether the DCI can pass the CRC check. If the DCI passes the CRC check, the terminal device receives the PDSCH according to the DCI at the specified resource location and the specified transmission format; otherwise, the terminal device considers that there is no PDSCH required receive. In semi-persistent scheduling, network equipment uses C-RNTI, semi-persistent wireless network temporary identification (semi-persistent scheduling-radio network identity, SPS-RNTI), or CS-RNTI scrambled PDCCH to specify for terminal equipment The radio resources used by PDSCH are hereinafter referred to as SPS resources. The terminal equipment will use this SPS resource to receive the PDSCH after each period. In this way, the network device does not need to send the PDCCH to the terminal device every time before sending the PDSCH to specify resources for the PDSCH. The SPS cycle, the number of processes used, and the response resources of the feedback response information corresponding to the PDSCH can be configured through radio resource control (RRC) signaling.

After the network device sends the PDSCH (hereinafter referred to as the initial transmission PDSCH) to the terminal device for the first time through dynamic scheduling or semi-persistent scheduling, the terminal device receives and checks whether the initial transmission PDSCH can pass the CRC check: if the check is successful, Then the terminal device sends an ACK to the network device; if the verification fails, the terminal device sends a NACK to the network device and buffers the soft bit information corresponding to the PDSCH of the initial transmission, which is usually the logarithm corresponding to the encoded bits of the PDSCH of the initial transmission Likelihood ratio. If the network device receives an ACK, it determines to send a new PDSCH or stops sending; if the network device receives a NACK, it determines to retransmit the PDSCH or stops sending, where the retransmitted PDSCH and the initially transmitted PDSCH carry the same information bits Sequence, but the coding bit sequence may be the same or different, that is, the same or different redundancy versions are used. After that, the network device will send DCI to the terminal device through the PDCCH, and the terminal device will receive the PDCCH and receive the retransmitted PDSCH based on the DCI carried by the PDCCH. After receiving the retransmitted PDSCH, the terminal device merges the initially transmitted PDSCH and the retransmitted PDSCH, that is, merges the soft bit information corresponding to the initially transmitted PDSCH and the soft bit information corresponding to the retransmitted PDSCH. After that, the terminal device uses the soft bit information obtained after the decoding to decode the obtained information bit sequence. If the CRC check is passed during decoding, the terminal device will send an ACK to the network device; otherwise, the terminal device sends a NACK to the network device . If after the first retransmission, the terminal device still fails to receive the PDSCH correctly (that is, the PDSCH of the initial transmission and the PDSCH of the retransmission still fail to pass the CRC check), then the terminal device continues to send NACK to the network device to start downloading One retransmission and merge. The terminal device and the network device can perform multiple retransmissions, such as 1 to 4 times.

In the above dynamic scheduling or semi-persistent scheduling mode, due to the limited length of the CRC, even if the DCI received by the terminal device through monitoring the PDCCH passes the CRC check, there may be errors in the DCI. This phenomenon is called PDCCH false alarm. Exemplarily, please refer to FIG. 1, which is a schematic diagram of a process of erroneously received PDSCH that is erroneously received when a PDCCH false alarm pollutes a retransmitted PDSCH.

Referring to FIG. 1, when a PDCCH false alarm occurs, if DCI error occurs, for example, some or all of the resource information or transmission format used by PDSCH indicated by DCI is incorrect, the terminal device cannot correctly receive the initial PDSCH. At this time, the terminal device will The received soft bit information of the erroneous PDSCH is buffered to be merged with the soft bit information of the PDSCH that is retransmitted thereafter. However, the erroneous DCI information will cause the terminal device to buffer the erroneous PDSCH soft bit information, which in turn causes the erroneous PDSCH soft bit information to "pollute" the retransmitted PDSCH soft bit information. Therefore, after multiple retransmissions, the terminal device still cannot correctly receive the PDSCH.

Therefore, when retransmission occurs, how to prevent the PDSCH of the initial transmission from "polluting" the PDSCH of the retransmission, so as to effectively use the combination of the PDSCH to improve the reliability of data transmission, is an urgent problem to be solved.

In view of this, the embodiments of the present application provide a data transmission method and device to avoid the "contamination" of the retransmitted PDSCH from the initially transmitted PDSCH, and to achieve the purpose of effectively using the PDSCH combination to improve the reliability of data transmission.

The communication method described in this application can be used in various communication systems, for example, Wifi, Worldwide Interoperability for Microwave Access (WiMAX), Global System for Mobile Communications (GSM) System, code division multiple access (Code Division Multiple Access, CDMA) system, time division multiple access (Time Division Multiple Access, TDMA) system, wideband code division multiple access (Wideband Code Multiple Division Access Multiple Wireless, WCDMA), frequency division multiple access ( Frequency Division Multiple Access (FDMA) system, Orthogonal Frequency-Division Multiple Access (OFDMA) system, single carrier FDMA (SC-FDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS) system , The third-generation mobile communication (the 3rd Generation Mobile Communication, 3G), long-term evolution (Long Term Evolution, LTE) system, advanced long-term evolution system (Advanced long term evolution (LTE-A), third-generation partnership program ( The 3rd Generation Partnership Project (3GPP) Cellular systems, a fifth-generation mobile communication (the 5th Generation Mobile Communication, 5G) and subsequent evolved system, the communication system.

The terminal device involved in the embodiments of the present application is a device that provides voice and / or data connectivity to a user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, and the like. Common terminal devices include: mobile phones, tablets, laptops, PDAs, mobile Internet devices (MID), and wearable devices, such as smart watches, smart bracelets, and pedometers.

The network equipment involved in the embodiments of the present application may be an ordinary base station (such as NodeB or eNB or gNB), a new radio controller (New Radio Controller, NR controller), a centralized network element (Centralized Unit), a new radio base station, RF remote module, micro base station, relay, distributed network unit (Distributed Unit), reception point (Transmission Reception Point, TRP), transmission point (Transmission Point, TP) or any other equipment, but this application is implemented Examples are not limited to this.

In the following, for convenience of description and clarity, the communication system architecture is specifically a 5G system as an example, and the communication system architecture of the present application will be described in detail. Exemplary, see Figure 2.

FIG. 2 is a schematic diagram of a communication system architecture to which the communication method provided by an embodiment of the present application is applicable. In this schematic diagram, the network device is, for example, gNB. During the data transmission process based on dynamic scheduling or semi-persistent scheduling, during the retransmission process, the network device carries the position of the PDCCH actually sent during the initial transmission in the candidate PDCCH set in the first indication The information is sent to the terminal device. For the terminal device, it can determine the position of the PDCCH actually received during the initial transmission and the position of the PDCCH actually received during the retransmission. During the retransmission process, since the network device sends the first indication information to the terminal device, the terminal device can also determine the position of the PDCCH actually sent by the network device during the initial transmission. Therefore, the terminal device can determine whether the position of the PDCCH actually sent by the network device and the PDCCH actually received by the terminal device are the same during the initial transmission. If they are not the same, it indicates that the PDCCH actually received by the terminal device and the actual network device during the initial transmission The transmitted PDCCH is not consistent, that is, a PDCCH false alarm has occurred. At this time, if the PDSCH of the initial transmission and the PDSCH of the retransmission are combined, the PDSCH of the initial transmission will pollute the PDSCH of the retransmission. Therefore, the terminal device will not merge the PDSCH of the initial transmission and the PDSCH of the retransmission, but directly The transmitted PDSCH determines the load. If the terminal device determines that the position of the PDCCH actually sent by the network device is the same as the position of the PDCCH actually received by the terminal device when the initial transmission is determined, the terminal device considers that no PDCCH false alarm has occurred, and combines the PDSCH of the initial transmission and the PDSCH of the retransmission.

It should be noted that in the embodiment of the present application, initial transmission and retransmission are two relative concepts, and the initial transmission is not limited to the first transmission, and the retransmission is the first retransmission. That is to say, in the two adjacent transmissions, the former is called initial transmission and the latter is called retransmission. For example, after the first retransmission, if the terminal device fails to correctly receive the PDSCH, the terminal device sends a NACK to the network device to start the second retransmission. In this process, the first retransmission is called the initial transmission, and the second retransmission is called the retransmission. For another example, after the second retransmission, if the terminal device fails to correctly receive the PDSCH, the terminal device sends a NACK to the network device to start the third retransmission. In this process, the second retransmission is called the initial transmission, and the third retransmission is called the retransmission.

Next, based on the system architecture shown in FIG. 2, taking the initial transmission as the first transmission and the retransmission as the first retransmission as an example, the data transmission method described in this application will be described in detail. Exemplary, see Figure 3.

FIG. 3 is a flowchart of a data transmission method provided by an embodiment of the present application. This embodiment is applicable to data transmission scenarios of dynamic scheduling or semi-persistent scheduling. This embodiment describes the data transmission method described in this application from the perspective of interaction between the network device and the terminal device. This embodiment includes:

101. Send a first physical downlink control channel PDCCH to a terminal device.

Wherein, the first PDCCH carries downlink control information DCI, and the DCI includes scheduling information and first indication information for scheduling the first physical downlink shared channel PDSCH, and the first indication information is used to indicate scheduling of the second PDSCH The position of the second PDCCH in the candidate PDCCH set, or the first indication information is used to indicate that the network device does not send the second PDCCH or the second PDSCH to the terminal device, and the first PDSCH and the second PDSCH carry the same load .

In the embodiment of the present application, the second PDCCH and the second PDSCH refer to the PDCCH and PDSCH actually sent by the network device during the initial transmission, and the first PDCCH and the first PDSCH refer to the PDCCH and PDSCH sent by the network device to the terminal device during the retransmission process. PDSCH.

In the embodiment of the present application, the candidate PDCCH set is, for example, a candidate PDCCH set configured by the network device through high-level signaling, and may be notified to the terminal device through high-level signaling. The high-level signaling is, for example, radio resource control (radio resource control) signaling, Main information block (main information block, MIB), system information block (system information block, SIB), or media access control layer (media access control, MAC) information unit (information element, IE), etc., or through the system or protocol A candidate PDCCH set is predefined, so it is known to network equipment and terminal equipment.

102. Send the first PDSCH scheduled by the scheduling information to the terminal device.

In this step, the network device sends the first PDSCH scheduled by the scheduling information to the terminal device, that is, the network device sends the retransmitted PDSCH to the terminal device; correspondingly, the terminal device receives the retransmitted PDSCH sent by the network device according to the scheduling information included in the DCI , That is, the first PDSCH. For example, DCI is used to indicate the resource position, modulation and coding method, number of transmission layers, etc. to receive the first PDSCH. At the resource location indicated by the DCI, the terminal device receives the first PDSCH according to the transmission format indicated by the DCI, and the transmission format is, for example, a modulation and coding method.

In the embodiment of the present application, the first PDSCH and the second PDSCH carry the same load, that is, the load of the initial transmission and the retransmission are the same.

103. Determine the load according to the first indication information and the first PDSCH.

After receiving the first PDSCH, the terminal device determines the load according to the first indication information included in the DCI and the first PDSCH. Exemplarily, the terminal device determines whether a PDCCH false alarm occurs according to the first indication information. If a false alarm occurs, the retransmitted PDSCH and the initially transmitted PDSCH are not combined, but the load is directly determined according to the retransmitted PDSCH; if it does not occur False alarm, then merge the retransmitted PDSCH and the initially transmitted PDSCH, and obtain the load according to the merged result.

In the data transmission method provided by the embodiment of the present application, during the retransmission process, the network device sends the first PDCCH carrying the first indication information to the terminal device; correspondingly, the terminal device receives the first PDCCH and includes the DCI according to the DCI of the first PDCCH. The first indication information determines the position of the PDCCH actually sent by the network device during the initial transmission, and then determines whether a PDCCH false alarm has occurred according to the position of the PDCCH actually sent by the network device and the position of the PDCCH actually received by the terminal device. Or, the terminal device determines that the network device does not actually send the initially transmitted PDCCH or PDSCH to the terminal device according to the first indication information. In this process, the terminal device can determine whether a PDCCH false alarm has occurred according to the first indication information. If it is determined that no false alarm has occurred, the PDSCH of the initial transmission and the PDSCH of the retransmission can be merged to obtain the merged gain; if the initial transmission is determined; If a false alarm occurs on the PDCCH, the retransmission PDSCH is used directly to obtain the load, so as to avoid the "pollution" of the initial transmission PDSCH received by the terminal device by the erroneous reception of the received retransmission PDSCH, so as to effectively use the combination of PDSCH to improve the reliability of data transmission. purpose.

The candidate PDCCH set in the above embodiment will be described in detail below.

The network device may define candidate PDCCH sets based on different aggregation levels (AL) of the PDCCH or search space types. When the network device configures different candidate PDCCH sets for different aggregation levels, different aggregation levels correspond to different candidate PDCCH sets, and different aggregation levels correspond to different resource granularities of the PDCCH. For example, the aggregation levels are 1, 2, When 4, 8, 16, 32, the corresponding PDCCH uses 1, 2, 4, 8, 16, 32 control channel units respectively; when the network device configures different candidate PDCC sets for different search space types, different search spaces The types correspond to different candidate PDCCH sets, for example, the common search space and the user equipment specific search space respectively correspond to different candidate PDCCH sets.

The network device may configure different candidate PDCCH sets through high-level signaling according to the aggregation level, etc., and the number of candidate PDCCHs in different PDCCH sets is different. For example, when the aggregation level is 1, 2, 4, 8, 16, 32, different aggregation levels correspond to different candidate PDCCH sets, and the number of candidate PDCCHs in these candidate PDCCH sets is 32, 16, 8, 4, respectively. 2. 1. Among them, high-level signaling such as RRC signaling, system information block (SIB), main information block (MIB) or media access control (MAC) layer information element (information element), IE).

In the following, the position of the candidate PDCCH in the candidate PDCCH set in the above embodiment will be described in detail.

In one design, in the candidate PDCCH set, the position of the candidate PDCCH may be the sequence number of the candidate PDCCH in the corresponding aggregation level of the candidate PDCCH; for example, the fourth candidate PDCCH in the candidate PDCCH set corresponding to AL = 1, AL = 2nd candidate PDCCH in the candidate PDCCH set corresponding to 2 or 0th candidate PDCCH in the candidate PDCCH set corresponding to AL = 4.

In a design, the position of the candidate PDCCH may also be the index of the first resource particle used by the candidate PDCCH. The resource granularity may be a control channel element (CCE), etc. The CCE index may be 1 or 3 or other positive integer.

In one design, the position of the candidate PDCCH indicated by the first indication information may be two indexes, one of which is an index of the aggregation level, and the other index is the position index of the PDCCH in the candidate PDCCH set corresponding to the aggregation level ; For example, AL = 1, 2, 4, 8 and there are 6, 4, 4, and 2 candidate PDCCHs respectively, then the position values corresponding to the candidate PDCCHs corresponding to AL = 1, 2, 4, and 8 are from 0 to 5, respectively. , From 0 to 3, from 0 to 3, from 0 to 1. Assuming that the indexes of the aggregation level are 0, 1, 2, and 3, respectively, if the two indexes carried by the first indication information are 2, 3 in sequence, it means that the candidate PDCCH is the last candidate PDCCH in the candidate PDCCH set corresponding to AL = 4. , That is, the PDCCH with a position index of 3.

The position of the candidate PDCCH indicated by the first indication information may also be the joint coding of the above two indexes; for example, AL = 1, 2, 4, 8 and there are 6, 4, 4, 2 candidate PDCCHs respectively, then AL The joint coding values corresponding to candidate PDCCHs corresponding to = 1, 2, 4, and 8 are from 0 to 5, from 6 to 9, from 10 to 13, and from 14 to 15, respectively.

In the embodiment of the present application, the second PDCCH and the second PDSCH refer to the PDCCH and PDSCH actually sent by the network device during the initial transmission, and the third PDCCH and the third PDSCH refer to the PDCCH and PDSCH actually received by the terminal device during the initial transmission , Where the positions of the second PDCCH and the third PDCCH in the candidate PDCCH set may be the same or different, when the positions of the second PDCCH and the third PDCCH in the candidate PDCCH set are the same, it means that the second PDCCH and the third PDCCH are the same PDCCH, that is, the PDCCH actually received by the terminal device during the initial transmission is the PDCCH actually sent by the network device, and no PDCCH false alarm will occur at this time; the position of the second PDCCH and the position of the third PDCCH in the candidate PDCCH set When they are different, it means that the second PDCCH and the third PDCCH are different PDCCHs. That is, during the initial transmission, the PDCCH actually received by the terminal device is not the PDCCH actually sent by the network device to the terminal device, and a PDCCH false alarm will occur at this time.

During the initial transmission, the terminal device actually receives the third PDCCH and receives the third PDSCH based on the DCI carried by the third PDCCH. If the DCI carried by the third PDCCH passes the CRC check, but the third PDSCH fails the CRC check , The terminal device sends a NACK to the network device to notify the network device that the terminal device did not receive the PDSCH correctly. After receiving the NACK, the network device sends the first PDCCH carrying DCI to the terminal device; correspondingly, the terminal device receives the first PDCCH carrying DCI. The DCI includes scheduling information and first indication information. The scheduling information is used to schedule the first PDSCH, that is, the retransmitted PDSCH. The first indication information is used to indicate the position of the second PDCCH scheduling the second PDSCH in the set of candidate PDCCHs. That is, the first indication information is used to indicate the position of the PDCCH that schedules the second PDSH actually sent by the network device. Or, the first indication information is used to indicate to the terminal device that the network device is actually and is sent the second PDCCH or the second PDSCH to the terminal device. Next, how the terminal device receives the PDSCH for initial transmission and how the terminal device determines the load will be described in detail.

In a feasible implementation manner, before receiving the first PDSCH sent by the network device according to the scheduling information, the method further includes: receiving a third PDCCH sent by the network device for scheduling a third PDSCH; Receiving the third PDSCH sent by the network device according to the third PDCCH; determining the load according to the first indication information and the first PDSCH includes: determining according to the first indication information Whether the positions of the second PDCCH and the third PDCCH in the candidate PDCCH set are the same; if the positions of the third PDCCH and the second PDCCH in the candidate PDCCH set are the same, according to the The first PDSCH and the third PDSCH determine the load; if the positions of the third PDCCH and the second PDCCH in the candidate PDCCH set are different, the load is determined according to the first PDSCH.

Exemplarily, during the initial transmission, when the first indication information is used to indicate the position of the second PDCCH scheduling the second PDSCH in the candidate PDCCH set, the network device sends the first Two PDCCHs and send the second PDSCH scheduled by the second PDCCH to the terminal device. In this process, the PDCCH and PDSCH sent by the network device to the terminal device are actually the second PDCCH and the second PDSCH, respectively. For the terminal device, the actually received PDCCH and PDSCH are the third PDCCH and the third PDSCH, respectively. In an actual implementation process, the positions of the second PDCCH actually sent by the network device and the third PDCCH actually received by the terminal device in the candidate resource set may be the same or different. The terminal device determines whether the position of the second PDCCH actually sent by the network device and the third PDCCH actually received by the terminal device in the candidate resource set are the same according to the first indication information carried by the first PDCCH, and if they are the same, the second PDCCH and The third PDCCH is the same PDCCH, that is, during the initial transmission, the PDCCH actually received by the terminal device is the PDCCH actually sent by the network device, the DCI carried by the third PDCCH passes the CRC check, there is no PDCCH false alarm, and the third PDSCH The first PDSCH will not be polluted. At this time, the terminal device determines the load according to the first PDSCH and the third PDSCH, that is, the terminal device determines the load according to the retransmitted PDSCH and the initially transmitted PDSCH.

If the position of the second PDCCH and the position of the third PDCCH in the candidate PDCCH set are different, it means that the second PDCCH and the third PDCCH are different PDCCHs, that is, the PDCCH actually received by the terminal device during the initial transmission is not a network device The PDCCH actually sent to the terminal device, although the DCI carried by the third PDCCH passes the CRC check, but a PDCCH false alarm occurs, and the third PDSCH will pollute the first PDSCH. At this time, the terminal device does not merge the first PDSCH and the third PDSCH Instead, the load is determined only based on the first PDSCH, that is, the terminal device does not combine the PDSCH of the initial transmission and the PDSCH of the retransmission, but directly determines the load based on the PDSCH of the retransmission, which avoids the PDSCH of the initial transmission from polluting the PDSCH of the retransmission.

In addition, when the first indication information is used to indicate that the network device does not send the second PDCCH or the second PDSCH to the terminal device, even if the terminal device receives the third PDCCH, and the DCI carried by the third PDCCH passes the CRC check. Since the first indication information indicates that the network device does not send the second PDCCH or the second PDSCH, the terminal device may determine that the received third PDCCH and / or third PDSCH is not sent by the network device to itself, and the PDCCH has occurred False alarm. At this time, the terminal device does not merge the first PDSCH and the third PDSCH, but only determines the load according to the first PDSCH, that is, the terminal device does not merge the PDSCH of the initial transmission and the PDSCH of the retransmission, but directly determines the load according to the PDSCH of the retransmission. , To avoid the PDSCH of the initial transmission polluting the PDSCH of the retransmission.

Exemplarily, when the first indication information is used to indicate that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, the first indication information may be set as follows:

Method 1: Use a separate DCI field to indicate the first indication information. For example, when the DCI field is 0, it indicates that the network device has not sent the second PDCCH or the second PDSCH to the terminal device. When the DCI field is 1, it indicates that the network device Send the second PDCCH or the second PDSCH to the terminal device.

Manner 2: The invalid position of one candidate PDCCH is used to indicate the first indication information, for example, the candidate PDCCH position takes a value of -1, so that it can be jointly encoded with the position of the PDCCH in the candidate PDCCH set. Specifically, the position of the candidate PDCCH indicated by the first indication information may be the joint coding of the above-mentioned aggregation level and the index of the candidate physical channel in the candidate PDCCH set corresponding to the aggregation level; for example, AL = 1, 2, 4, 8 respectively 6, 4, 4, 2 candidate PDCCHs, then the joint coding values corresponding to candidate PDCCHs corresponding to AL = 1, 2, 4, 8 are from 0 to 5, from 6 to 9, from 10 to 13, from 14 To 15. The joint coding value ≥ 16 or <0 may be used to indicate that the second PDCCH or the second PDSCH is not sent to the terminal device.

In this embodiment, before receiving the first PDSCH, the terminal device receives the third PDSCH, determines whether a PDCCH false alarm occurs according to the first indication information, and then determines whether it is necessary to combine the PDSCH of the initial transmission and the PDSCH of the retransmission, thereby avoiding The PDSCH of the initial transmission "contaminates" the PDSCH of the retransmission, so as to effectively utilize the combination of the PDSCH to improve the reliability of data transmission.

In a feasible implementation manner, the determining the load according to the first indication information and the first PDSCH includes: determining whether the first indication information indicates that the network device has not sent The value of the second PDCCH or the second PDSCH, if the first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, then according to the first A PDSCH determines the load.

Exemplarily, the network device configures multiple predefined values through high-level signaling and the like, and different predefined values have different meanings.

For example, the predefined values of the network device through high-level signaling include: -1, 0, 3, 5, 6, and so on. Among them, 0, 3, 5, and 6 respectively correspond to different positions in the PDCCH set. Compared with 0, 3, 5, and 6, -1 is a value less than 0, that is, a specific value. When the value of the first indication information is the specific value, the first indication information indicates that the network device has not sent the second PDCCH or the second PDSCH to the terminal device. When the first indication information is a specific value, during the initial transmission, even if the terminal device receives the third PDCCH or the third PDSCH, the terminal device determines that the third PDCCH or the third PDSCH is incorrect according to the first indication information, A PDCCH false alarm occurs, and if the third PDSCH and the first PDSCH are combined, the first PDSCH will be contaminated. Therefore, the terminal device determines the load according to the retransmitted PDSCH, that is, the first PDSCH.

In this embodiment, during the initial transmission, if the network device does not send the second PDCCH or the second PDSCH to the terminal device, during the retransmission process, the network device sends the first indication contained in the DCI carried by the first PDCCH to the terminal device The information indicates to the terminal device that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, so that the terminal device determines that a PDCCH false alarm occurs without combining the third PDSCH and the first PDSCH according to the first indication information, thereby avoiding the initial transmission The PDSCH "contaminates" the retransmitted PDSCH to achieve the purpose of effectively using the PDSCH combination to improve the reliability of data transmission.

Hereinafter, after the terminal device determines the load according to the first instruction information and the first PDSCH, how to process the determined load will be described in detail.

In a feasible implementation manner, after determining the load according to the first indication information and the first PDSCH, the method further includes: the terminal device determining whether the load passes a CRC check; if the load Pass the CRC check, the terminal device sends a positive response to the network device on the resource indicated by the second indication information, that is, sends an ACK; if the load fails the CRC check, the terminal device Sending a negative response, ie NACK, to the network device on the resource indicated by the second indication information; wherein, the second indication information is carried in the first PDCCH.

Exemplarily, after the terminal device determines the load, for example, after the terminal device determines the load according to the first PDSCH and the third PDSCH, for example, after the terminal device determines the load according to the first PDSCH, the terminal device determines whether the load can pass CRC check. If the load can pass the CRC check, send an ACK to the network device on the resource indicated by the second indication information; if the load does not pass the CRC check, the terminal device sends to the network device on the resource indicated by the second indication information NACK, so that the network device determines the retransmitted PDSCH again or stops data transmission. The second indication information is carried in the first PDCCH, that is, the first PDCCH carries second indication information for indicating the response resource.

In this embodiment, after determining the load, the terminal device determines whether the load can pass the CRC check, and then sends response information to the network device on the response resource indicated by the second indication information carried in the first PDCCH according to the check result to achieve data transmission.

In addition, an improvement to the semi-persistent scheduling method is data transmission based on blind detection: a resource configured by the network device through RRC signaling or predefined by the system to send one or more candidate physical channels, where each candidate The payload of the physical channel contains control information and transport blocks, and the control information contains first information used to indicate the response resource to the terminal device. The terminal device blindly detects the candidate physical channel in the set of candidate physical channels on the designated resource to obtain the physical channel of the initial transmission, and obtains the control information and the transport block according to the load of the physical channel of the initial transmission. For this blind detection-based data transmission, if the terminal device fails to blindly detect the candidate physical channel in the set of candidate physical channels, the physical channel carried by the PDSCH retransmission is scheduled through the PDCCH to obtain control information and transport blocks. There may be an error, and the wrong physical channel cached by the terminal device will "pollute" the retransmitted physical channel. Therefore, even after multiple retransmissions, the terminal device still cannot correctly receive the physical channel. For example, reference may be made to FIG. 4, which is a schematic diagram of a PDSCH process in which the first physical channel that is initially transmitted when the physical channel detects a false alarm pollutes the retransmission.

Please refer to FIG. 4. The initial transmission is a data transmission process based on blind detection. The payload of the physical channel of the initial transmission includes control information and transmission blocks. After channel coding, the network device configures candidate physical channels from high-level signaling. The first physical channel is determined from the N candidate physical channels included in the set, and the first physical channel is sent out. The retransmission is based on the dynamic scheduling of the PDCCH. When the first physical channel received by the terminal device is wrong, the wrong physical channel is buffered, and the wrong physical channel will pollute the retransmitted PDSCH.

Based on the above, it can be seen that, similar to the dynamic scheduling and semi-persistent scheduling methods, in the data transmission process based on blind detection, the problem that the physical channel of the initial transmission pollutes the physical channel of the retransmission also occurs during the retransmission.

Therefore, when retransmission occurs, how to prevent the physical channel of the initial transmission from polluting the retransmitted physical channel, thereby effectively using the combination of physical channels to improve the reliability of data transmission, is a problem that needs to be resolved.

In view of this, embodiments of the present application provide a data transmission method and device to avoid the initial transmission of physical channels from "polluting" the retransmitted physical channels, and to achieve the purpose of effectively using the combination of physical channels to improve the reliability of data transmission.

In this embodiment, for network equipment, terminal equipment, and applicable systems, reference may be made to the dynamic scheduling-based and semi-persistent scheduling methods described above, and details are not described herein again. In the following, how to avoid the contamination of the retransmitted physical channel with the physical channel of the initial transmission is described in detail during the data transmission process based on the blind detection. Exemplary, see Figure 4.

FIG. 5 is a flowchart of another data transmission method provided by an embodiment of the present application. This embodiment is applicable to an improved method for semi-persistent scheduling data transmission, that is, a data transmission scenario based on blind detection. This embodiment describes the data transmission method described in this application from the perspective of interaction between the network device and the terminal device. This embodiment includes:

201. The network device sends the first physical downlink control channel PDCCH to the terminal device.

Wherein, the first PDCCH carries downlink control information DCI, and the DCI includes scheduling information and first indication information for scheduling a first physical downlink shared channel PDSCH, and the first indication information is used to indicate that the first physical channel is in The position in the set of candidate physical channels, or the first indication information is used to indicate that the network device does not send the first physical channel to the terminal device, and the first PDSCH and the first physical channel carry the same load.

In the embodiment of the present application, the first physical channel refers to the physical channel actually sent by the network device during the initial transmission, and the first PDSCH refers to the PDSCH sent by the network device to the terminal device during the retransmission process.

In the embodiment of the present application, the set of candidate physical channels is, for example, a set of candidate physical channels configured by the network device through high-level signaling, and can be notified to the terminal device through high-level signaling, such as RRC signaling and the main information block ( main information block (MIB), system information block (system information block, SIB), or media access control (media access control, MAC) layer information element (information element, IE), etc .; or, one predefined by the system or protocol The set of candidate physical channels is known to network equipment and terminal equipment.

202. The network device sends the first PDSCH scheduled by the scheduling information to the terminal device.

In this step, the network device sends the first PDSCH scheduled by the scheduling information to the terminal device; correspondingly, the terminal device receives the first PDSCH sent by the network device according to the scheduling information included in the DCI. For example, DCI is used to indicate the resource position, modulation and coding method, number of transmission layers, etc. to receive the first PDSCH. The terminal device receives the first PDSCH according to the modulation and coding method indicated by the DCI at the resource position indicated by the DCI.

In the embodiment of the present application, the first PDSCH and the first physical channel carry the same payload; the bit sequence after the payload encoding carried by the first PDSCH may be the same as or different from the bit sequence after the payload encoding carried by the first physical channel That is, the redundancy version corresponding to the load carried by the first PDSCH is the same as or different from the redundancy version corresponding to the load carried by the first physical channel.

203. The terminal device determines the load according to the first indication information and the first PDSCH.

After receiving the first PDSCH, the terminal device determines the load according to the first indication information included in the DCI and the first PDSCH. Exemplarily, the terminal device determines whether a physical channel detection or a false alarm has occurred according to the first indication information. If a physical channel detection or a false alarm has occurred, the retransmitted first PDSCH and the initially transmitted physical channel are not combined, but The load is directly determined according to the first PDSCH; if no physical channel detection or false alarm is received, the retransmitted first PDSCH and the initially transmitted physical channel are combined, and the load is obtained according to the combined result.

In the data transmission method provided by the embodiment of the present application, during the retransmission process, the network device sends the first PDCCH carrying the first indication information to the terminal device; correspondingly, the terminal device receives the first PDCCH and includes the DCI according to the DCI of the first PDCCH. The first indication information determines the position of the first physical channel actually sent by the network device during the initial transmission, and then based on the position of the first physical channel actually sent by the network device and the second physical channel of the initial transmission actually received by the terminal device Position determines the load. In this process, the terminal device can determine whether physical channel detection or false alarms have occurred according to the first indication information, and then determine whether it is necessary to merge the first physical channel and the first PDSCH that were initially transmitted. If no false alarms have occurred, Then, the first physical channel and the first PDSCH that are initially transmitted are combined and received. Since the first PDSCH carries the redundant version of the retransmission corresponding to the load of the first physical channel, the combined gain can be effectively used to improve data transmission Reliability; if a false alarm occurs, because the first PDSCH actually carries the redundant version of the retransmission corresponding to the load of the first physical channel, the load can be obtained directly from the first PDSCH, thereby avoiding the first transmission The physical channel "contaminates" the first PDCSH to achieve the purpose of effectively using the combination of physical channels to improve the reliability of data transmission and reduce the delay.

In this embodiment, the aggregation level of the candidate physical channel may be defined according to the number of resource units used by the candidate physical channel, for example, the aggregation level is 1, 2, 4, 8, and the set of candidate physical channels may be aggregated for different candidate physical channels Defined separately, the indication format of the location of the candidate physical channel may be the aggregation level of the candidate physical channel and the index of the candidate physical channel in the corresponding set of candidate physical channels, or may be the joint coding of the above aggregation level and the corresponding index, etc. For the location of the physical channel set and the location of the candidate physical channel, reference may be made to the relevant description about the location of the candidate PDCCH set and the location of the candidate PDCCH in the above dynamic scheduling or semi-persistent scheduling scenario, which is not repeated here.

In the embodiment of the present application, the first physical channel refers to the physical channel actually sent by the network device during the initial transmission, and the second physical channel refers to the physical channel actually received by the terminal device during the initial transmission. Among them, the first physical channel and the second physical channel The positions in the set of candidate physical channels of the two physical channels may be the same or different. When the positions in the set of candidate physical channels of the first physical channel and the second physical channel are the same, it means that the first physical channel and the second physical channel are the same physical channel , That is, during the initial transmission, the physical channel actually received by the terminal device is the physical channel actually sent by the network device, and no physical channel detection false alarm will occur at this time; the first physical channel and the second physical channel are in the set of candidate physical channels When the positions in are different, it means that the first physical channel and the second physical channel are different physical channels. That is, during the initial transmission, the physical channel actually received by the terminal device is not the physical channel actually sent by the network device to the terminal device. At this time, a physical channel detection false alarm will occur.

During the initial transmission, the terminal device actually receives the second physical channel. If the second physical channel fails the CRC check, the terminal device does not send a response message to the network device. If the terminal equipment responds positively, it is considered that the terminal equipment has not correctly received the physical channel. The network device sends the first PDCCH carrying DCI to the terminal device; correspondingly, the terminal device receives the first PDCCH carrying DCI. The DCI includes scheduling information and first indication information. The scheduling information is used to schedule the first PDSCH, that is, the retransmitted PDSCH, and the first indication information is used to indicate the position of the first physical channel in the set of candidate physical channels, that is, That is, the first indication information is used to indicate the position of the first physical channel actually sent by the network device in the set of candidate physical channels. Or, the first indication information is used to indicate that the network device does not actually send the first physical channel to the terminal device. Next, how the terminal device receives the physical channel of the initial transmission and how the terminal device determines the load will be described in detail.

In a feasible implementation manner, before receiving the first PDSCH sent by the network device according to the scheduling information, the method further includes: receiving a second physical channel sent by the network device; The indication information and the first PDSCH determining the payload include: according to the first indication information, determining whether the positions of the first physical channel and the second physical channel in the set of candidate physical channels are the same ; If the first physical channel and the second physical channel are in the same position in the set of candidate physical channels, the load is determined according to the first PDSCH and the second physical channel; if the first If a physical channel and the second physical channel have different positions in the set of candidate physical channels, the load is determined according to the first PDSCH.

For example, please refer to FIG. 6, which is a schematic diagram of a process of initial transmission and retransmission in a data transmission process based on blind detection provided by an embodiment of the present application.

Referring to FIG. 6, during the initial transmission, when the first indication information is used to indicate the position of the first physical channel actually sent by the network device in the set of candidate physical channels, the network device sends the first physical channel to the terminal device, that is, the network The device determines the first physical channel from the set of candidate physical channels containing N candidate physical channels and sends it to the terminal device. The terminal device receives the first physical channel by blindly detecting the candidate physical channel in the set of candidate physical channels. In this process, the physical channel actually sent by the network device to the terminal device is the first physical channel. For the terminal device, the physical channel it actually receives is the second physical channel. In an actual implementation process, the positions of the first physical channel actually sent by the network device and the second physical channel actually sent by the terminal device in the set of candidate physical channels may be the same or different. The terminal device determines whether the positions of the first physical channel actually sent by the network device and the second physical channel actually received by the terminal device in the set of candidate physical channels are the same according to the first indication information carried in the first PDCCH. One physical channel and the second physical channel are the same physical channel, that is, during the initial transmission, the second physical channel that the terminal device actually blindly detected successfully is the first physical channel actually sent by the network device, and no physical channel detection or When receiving a false alarm, the second physical channel and the first PDSCH can be combined and received. The second physical channel does not pollute the first PDSCH. At this time, the terminal device determines the load according to the second physical channel and the first PDSCH, that is, the terminal device The PDSCH and the second physical channel of the initial transmission determine the payload, where the first PDSCH carries the redundant version of the retransmission corresponding to the payload.

If the positions of the second physical channel and the first physical channel in the set of candidate physical channels are different, it means that the first physical channel and the second physical channel are different physical channels in the set of candidate physical channels. That is, during the initial transmission, the terminal device actually The received physical channel is not the physical channel actually sent by the network device to the terminal device. At this time, if the second physical channel and the first PDSCH are combined and received, it will cause the erroneously received second physical channel to pollute the first PDSCH. Therefore, The terminal device does not combine the first PDSCH and the second physical channel, but only determines the load according to the first PDSCH, which avoids the initial transmission of the physical channel from polluting the first PDSCH.

In addition, when the first indication information is used to indicate that the network device has not sent the first physical channel to the terminal device, even though the terminal device has received the second physical channel, the first indication information indicates that the network device has not sent the first physical channel, so , The terminal device may determine that the received second physical channel is not sent by the network device to itself, and a physical channel detection or reception false alarm has occurred. At this time, the terminal device does not merge the first PDSCH and the second physical channel, but only determines the load according to the first PDSCH, thereby avoiding the initial transmission of the physical channel from polluting the first PDSCH.

In this embodiment, before receiving the first PDSCH, the terminal device receives the second object channel, determines whether a physical channel detection or a false alarm has occurred according to the first indication information, and then determines whether it is necessary to combine the physical channel of the initial transmission and the first A PDSCH, so as to avoid the “contamination” of the erroneously received initial transmission physical channel for retransmitting the first PDSCH with the same payload, and to achieve the purpose of effectively using the combination of physical channels to improve the reliability of data transmission.

In a feasible implementation manner, the determining the load according to the first indication information and the first PDSCH includes: determining whether the first indication information indicates that the network device has not sent The value of the second PDCCH or the second PDSCH, if the first indication information is the predefined value, the load is determined according to the first PDSCH.

Exemplarily, the network device configures multiple predefined values through high-level signaling and the like, and different predefined values have different meanings. For example, the predefined values of the network device through high-level signaling include: -2, 0, 3, 5, 6, and so on. Among them, 0, 3, 5, and 6 respectively correspond to different positions in the PDCCH set. Compared with 0, 3, 5, and 6, -2 is a value less than 0, that is, a specific value. When the value of the first indication information is the specific value, the first indication information indicates that the network device has not sent the first physical channel to the terminal device. When the first indication information is a specific value, during the initial transmission, even if the terminal device receives the second physical channel, the terminal device determines that the second physical channel is not correct according to the first indication information, physical channel detection or Receiving a false alarm, if the second physical channel and the first PDSCH are combined, the first PDSCH will be contaminated. Therefore, the terminal device determines the load according to the retransmitted PDSCH, that is, the first PDSCH.

In this embodiment, during the initial transmission, if the network device does not send the first physical channel to the terminal device, during the retransmission process, the network device sends the first indication information contained in the DCI carried by the first PDCCH to the terminal device to the terminal device The device indicates that the network device has not sent the first physical channel to the terminal device, so that the terminal device determines that physical channel detection or false alarm occurs without merging the second physical channel and the first PDSCH according to the first indication information, thereby avoiding the initial transmission The physical channel "pollution" is used to retransmit the first PDSCH of the same payload, so as to effectively utilize the combination of physical channels to improve the reliability of data transmission.

In the following, how the terminal device receives the second physical channel based on blind detection in the foregoing embodiment will be described in detail.

In a feasible implementation manner, the receiving the second physical channel sent by the network device includes: determining whether there is a candidate physical channel in the candidate physical channel set that can be checked by a cyclic redundancy check code CRC ; If there is a candidate physical channel that can pass the CRC check in the candidate physical channel set, then a candidate physical channel that can pass the CRC check is used as the second physical channel, and a positive response is sent to the network device ; If there is no candidate physical channel that can pass the CRC check in the candidate physical channel set, cache M candidate physical channels in the candidate physical channel set, where M≥0. Wherein, the load of the candidate physical channels in the set of candidate physical channels includes transport blocks and control information, and the control information is used to indicate the resources used by the terminal device to send the response information.

Exemplarily, the candidate physical channel set includes N candidate physical channels, and the terminal device may sequentially detect the N candidate physical channels. As long as one candidate physical channel in the candidate physical channel set passes the CRC check, the candidate The other candidate physical channels in the physical channel set are further detected, and the terminal device uses the candidate physical channel that passes the CRC check as a second physical channel, and sends the response resource indicated by the control information in the payload of the second physical channel to the network device Affirmative response is sent; this solution does not need to detect all N candidate physical channels, which can effectively reduce the processing delay.

Exemplarily, the terminal device may also detect all the N candidate physical channels, and select one candidate physical channel as the second physical channel from the multiple candidate physical channels that pass the CRC check, and select the candidate physical channel as the second physical channel. A positive response is sent to the network device on the response resource indicated by the control information in the payload. Optionally, the second physical channel may be a plurality of candidate physical channels with the largest auto-correlation value among the candidate physical channels that pass the CRC check. The auto-correlation may be that the terminal device correlates the received symbol sequence and the modulation symbol sequence. The received symbol sequence is obtained by the terminal device performing channel equalization on the received candidate physical channel, and the modulation symbol sequence is obtained after the terminal device performs channel decoding on the received candidate physical channel, and then performs channel coding and modulation. In this solution, the terminal device detects all candidate physical channels in the set of candidate physical channels. By selecting the candidate physical channel with the largest autocorrelation, the reliability of detection can be effectively improved, retransmission is avoided, and the time caused by retransmission is effectively reduced Delay.

If there is no candidate physical channel that can pass the CRC check in the candidate physical channel set, the terminal device cache selects and caches M candidate physical channels from the N candidate physical channels included in the candidate physical channel set. One of the M candidate channels will serve as the second physical channel.

In this embodiment, the terminal device receives the second physical channel.

Next, how to determine the load according to the first indication information and the M candidate physical channels after the terminal device caches the M candidate physical channels is described in detail.

In a feasible implementation manner, if the positions of the first physical channel and the second physical channel in the set of candidate physical channels are the same, the determined location is determined according to the first PDSCH and the second physical channel The payload includes: if the first physical channel and the buffered one of the M candidate physical channels have the same position in the candidate physical channel set, then at least M candidate physical channels are combined with The candidate physical channel with the same position of the first physical channel is used as the second physical channel; the load is determined according to the first PDSCH and the second physical channel.

Exemplarily, the terminal device sequentially determines whether there are candidate physical channels at the same position as the first physical channel among the M candidate physical channels. If there is, it indicates that the M candidate physical channels actually cached by the terminal device include the actual transmission by the network device Of the first physical channel, the candidate physical channel at the same position as the first physical channel among the M candidate physical channels is used as the second physical channel. At this time, no physical channel detection or false alarm occurs, and the terminal device uses the second physical channel Determine the load with the first PDSCH, that is, combine the second physical channel with the first PDSCH; if there is no candidate physical channel with the same position as the first physical channel among the M candidate physical channels, it indicates that the M candidate physical channels actually cached by the terminal device The first physical channel actually sent by the network device is not included. At this time, physical channel detection or false alarm occurs, and the terminal device determines the load according to the first PDSCH, that is, the terminal device does not merge the first PDSCH and the second physical channel.

In this embodiment, the terminal device determines the load according to the cached M candidate physical channels and the first indication information.

In the foregoing embodiment, the terminal device caches M candidate physical channels. The size of M may be predefined by the network device and the terminal device, or may be configured by the network device for the terminal device through high-level signaling.

Next, how does the terminal device select and cache M candidate physical channels from the set of candidate physical channels containing N candidate physical channels, and select one candidate physical channel from the M candidate physical channels as the second physical channel? The first indication information describes in detail the combination of the second physical channel and the first PDSCH.

In a feasible implementation manner, if there is no candidate physical channel in the candidate physical channel set that can pass the CRC check, the terminal device caches M candidate physical channels, including: The autocorrelation threshold determines M candidate physical channels from the set of candidate physical channels and caches them.

Exemplarily, the terminal device sorts the N candidate physical channels included in the set of candidate physical channels according to the autocorrelation threshold, selects the first M candidate physical channels with a higher autocorrelation threshold according to the sorting result, and caches the M candidates Physical channel. In this process, the autocorrelation may be that the terminal device correlates the received symbol sequence and the modulation symbol sequence. The received symbol sequence is obtained by the terminal device performing channel equalization on the received candidate physical channel, and the modulation symbol sequence is obtained after the terminal device performs channel decoding on the received candidate physical channel, and then performs channel coding and modulation. In addition, auto-correlation can also be achieved in other ways, which is not limited here.

In this embodiment, the terminal device determines and buffers M candidate physical channels from the set of candidate physical channels.

In a feasible implementation manner, after determining the load according to the first indication information and the first PDSCH, the method further includes: determining whether the load passes the CRC check; if the load passes the CRC Check, then send a positive response to the network device on the resource indicated by the second indication information; if the load fails the CRC check, send to the network device on the resource indicated by the second indication information Negative answer; wherein, the second indication information is carried in the first PDCCH.

Exemplarily, after the terminal device determines the load, for example, after the terminal device determines the load according to the first PDSCH and the second physical channel, for example, after the terminal device determines the load according to the first PDSCH, the terminal device determines whether the load can be Pass CRC check. If the load can pass the CRC check, send an ACK to the network device on the resource indicated by the second indication information; if the load does not pass the CRC check, the terminal device sends to the network device on the resource indicated by the second indication information NACK, so that the network device determines the retransmitted PDSCH again or stops data transmission. The second indication information is carried in the first PDCCH, that is, the first PDCCH carries second indication information for indicating the response resource.

In addition, because during the initial transmission, during the data transmission process based on blind detection, the terminal device actually receives the second physical channel of the initial transmission, the payload of the second physical channel includes control information and a transmission block, and the control information includes an indication Resource indication information of the response resource. Therefore, after determining the load and verifying the load, the terminal device may also send response information on the response resource indicated by the control information included in the load of the second physical channel. For example, the response resource indicated by the control information contained in the payload of the second physical channel includes a slot resource used for sending the response information, and time-frequency resources such as symbols and resource blocks (RB) in the slot resource ), Sequence or code resources, etc. After receiving the second physical channel, the terminal device sends response information to the network device on the response resource to indicate to the network device whether the terminal device correctly receives the second physical channel. In the embodiment of the present application, after determining the load according to the first indication information and the first PDSCH, the terminal device continues to send the response resource to the network device on the response resource according to the CRC check result of the load to indicate to the network device Correctly combine and receive physical channels.

In other implementation manners, the terminal device determines the load according to the first indication information and the first PDSCH, and performs a CRC check on the load. After obtaining the CRC check result, the response resource indicated by the control information of the second physical channel may not be used. The network device sends the response information, but determines the response resource for sending the response information by other means. For example, the first PDCCH carries the index of the time slot, the response resources indicated by the control information of the second physical channel include the slot resources used to send the response information, and the time frequency resources within the slot resources such as For symbols, resource blocks (RBs), sequences, or code resources, the terminal device determines the slot index according to the first PDCCH, and determines the time-frequency resource in the slot resource according to the control information of the second physical channel, thereby determining A response resource, the time slot of the response resource is different from the time slot of the response resource indicated by the second physical channel.

7 is a schematic structural diagram of a data transmission device according to an embodiment of the present application. The data transmission device involved in this embodiment may be a terminal device or a chip applied to the terminal device. The data transmission device may be used to perform the functions of the terminal device in FIG. 3 or the optional embodiment described above. As shown in FIG. 7, the data transmission device 100 may include: a receiving unit 11, a processing unit 12 and a transceiving unit 13. among them,

The receiving unit 11 is configured to receive a first physical downlink control channel PDCCH sent by a network device, where the first PDCCH carries downlink control information DCI, and the DCI includes scheduling information and a first physical downlink shared channel PDSCH scheduling information Indication information, the first indication information is used to indicate the position of the second PDCCH scheduling the second PDSCH in the candidate PDCCH set, or the first indication information is used to indicate that the network device has not sent the second to the terminal device PDCCH or the second PDSCH, the first PDSCH and the second PDSCH carry the same load;

The sending unit 13 is configured to receive the first PDSCH sent by the network device according to the scheduling information;

The processing unit 12 is configured to determine the load according to the first indication information and the first PDSCH.

In a feasible design, before receiving the first PDSCH sent by the network device according to the scheduling information, the receiving unit 11 is further configured to receive a schedule sent by the network device for scheduling the third PDSCH A third PDCCH; receiving the third PDSCH sent by the network device according to the third PDCCH;

The processing unit 12 is specifically configured to determine whether the positions of the second PDCCH and the third PDCCH in the candidate PDCCH set are the same according to the first indication information; if the third PDCCH and the The second PDCCH has the same position in the candidate PDCCH set, then the load is determined according to the first PDSCH and the third PDSCH; and / or if the third PDCCH and the second PDCCH are in If the positions in the candidate PDCCH set are different, the load is determined according to the first PDSCH.

In a feasible design, the processing unit 12 is specifically configured to determine whether the first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to a terminal device; if The first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, and then the load is determined according to the first PDSCH.

In a feasible design, the sending unit 13, after the processing unit 12 determines the load according to the first indication information and the first PDSCH, is also used to determine whether the load passes the CRC check If the load passes the CRC check, then send a positive response to the network device on the resource indicated by the second indication information; and / or, if the load does not pass the CRC check, then in the first Sending a negative response to the network device on the resource indicated by the second indication information; wherein, the second indication information is carried in the first PDCCH.

The data transmission device provided in the embodiment of the present application can perform the actions of the terminal device in FIG. 3 and the optional embodiments described above. The implementation principles and technical effects are similar, and details are not described herein again.

FIG. 8 is a schematic structural diagram of another data transmission device according to an embodiment of the present application. The data transmission device involved in this embodiment may be a network device or a chip applied to the network device. The data transmission apparatus may be used to perform the functions of the network device in FIG. 3 or the optional embodiment described above. As shown in FIG. 8, the data transmission device 200 may include:

The sending unit 21 is configured to send a first physical downlink control channel PDCCH to a terminal device, where the first PDCCH carries downlink control information DCI, and the DCI includes scheduling information and a first indication for scheduling a first physical downlink shared channel PDSCH Information, the first indication information is used to indicate the position of the second PDCCH scheduling the second PDSCH in the candidate PDCCH set, or the first indication information is used to indicate that the network device has not sent the second PDCCH to the terminal device Or the second PDSCH, the first PDSCH and the second PDSCH carry the same load; and send the first PDSCH scheduled by the scheduling information to the terminal device.

In a feasible design, when the first indication information is used to indicate the position of the second PDCCH scheduling the second PDSCH in the candidate PDCCH set, the sending unit 21 sends to the terminal device according to the scheduling information Before the first PDSCH, it is also used to send a second PDCCH for scheduling a second PDSCH to the terminal device; and send the second PDSCH to the terminal device according to the second PDCCH.

In a feasible design, when the first indication information indicates that the network device has not sent the value of the second PDCCH or the second PDSCH to the terminal device, the first indication information indicates that the network device has not Sending the second PDCCH or the second PDSCH to the terminal device.

In a feasible design, the foregoing data transmission device 200 further includes:

The receiving unit 22 is configured to, after the sending unit 21 sends the first PDSCH to the terminal device according to the scheduling information, receive a positive response or a negative response sent by the terminal device on the resource indicated by the second indication information A response, wherein the second indication information is carried in the first PDCCH.

The data transmission apparatus provided in the embodiments of the present application can perform the actions of the network device in FIG. 3 and the optional embodiments described above. The implementation principles and technical effects are similar, and details are not described herein again.

9 is a schematic structural diagram of yet another data transmission device according to an embodiment of the present application. The data transmission device involved in this embodiment may be a terminal device or a chip applied to the terminal device. The data transmission device may be used to perform the functions of the terminal device in FIG. 5 or the optional embodiment described above. As shown in FIG. 9, the data transmission device 300 may include:

The receiving unit 31 is configured to receive a first physical downlink control channel PDCCH sent by a network device, where the first PDCCH carries downlink control information DCI, and the DCI includes scheduling information and a first physical downlink shared channel PDSCH scheduling information Indication information, the first indication information is used to indicate the position of the first physical channel in the set of candidate physical channels, or the first indication information is used to indicate that the network device has not sent the first physical channel to the terminal device, The first PDSCH and the first physical channel carry the same load; receiving the first PDSCH sent by the network device according to the scheduling information;

The processing unit 32 is configured to determine the load according to the first indication information and the first PDSCH.

In a feasible design, the receiving unit 31 is further configured to receive the second physical channel sent by the network device before receiving the first PDSCH sent by the network device according to the scheduling information;

The processing unit 32 is specifically configured to determine whether the positions of the first physical channel and the second physical channel in the set of candidate physical channels are the same according to the first indication information; if the first physical The channel and the second physical channel are in the same position in the candidate physical channel set, then the load is determined according to the first PDSCH and the second physical channel; and / or, if the first physical channel If the position of the second physical channel in the set of candidate physical channels is different, the load is determined according to the first PDSCH.

In a feasible design, the above data transmission device further includes a sending unit 33; the processing unit 32 is also used to determine whether there is a CRC checkable CRC in the candidate physical channel set Candidate physical channel, the load of the candidate physical channel in the set of candidate physical channels includes transport blocks and control information, and the control information is used to indicate the resources used by the terminal device to send the response information; if the set of candidate physical channels There is a candidate physical channel that can pass the CRC check, then one of the candidate physical channels that can pass the CRC check is used as the second physical channel; and / or, if the candidate physical channel If there is no candidate physical channel that can pass the CRC check in the channel set, then M candidate physical channels in the candidate physical channel set are cached, where M≥0 and an integer;

The sending unit 33 is used to send a positive response to the network device when there is a candidate physical channel that can pass the CRC check in the candidate physical channel set.

In a feasible design, if the positions of the first physical channel and the second physical channel in the set of candidate physical channels are the same, the processing unit 32 is specifically configured to use the M candidate physical The candidate physical channel in the same position as the first physical channel in the channel is used as the second physical channel; the load is determined according to the first PDSCH and the second physical channel.

In a feasible design, the M is predefined; or, the M is configured by the network device for the terminal device through high-level signaling.

In a feasible design, when the processing unit 32 caches the M candidate physical channels, it is specifically used to determine and cache the M candidate physical channels from the set of candidate physical channels according to the autocorrelation threshold.

In a feasible design, the processing unit 32 is specifically configured to determine whether the first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, if The first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, and then the load is determined according to the first PDSCH.

In a feasible design, after determining the load according to the first indication information and the first PDSCH, the processing unit 32 is further used to determine whether the load passes the CRC check;

The sending unit 33 is configured to send a positive response to the network device on the resource indicated by the second indication information if the load passes the CRC check; and / or if the load does not pass the CRC check Verification, a negative response is sent to the network device on the resource indicated by the second indication information; wherein, the second indication information is carried in the first PDCCH.

The data transmission device provided in the embodiment of the present application may perform the actions of the terminal device in FIG. 5 and the optional embodiments described above. The implementation principles and technical effects are similar, and details are not described herein again.

10 is a schematic structural diagram of yet another data transmission device according to an embodiment of the present application. The data transmission device involved in this embodiment may be a network device or a chip applied to the network device. The data transmission apparatus may be used to perform the functions of the network device in FIG. 5 or the optional embodiment described above. As shown in FIG. 10, the data transmission device 400 may include:

The sending unit 41 is configured to send a first physical downlink control channel PDCCH to a terminal device, where the first PDCCH carries downlink control information DCI, and the DCI includes scheduling information and a first indication for scheduling a first physical downlink shared channel PDSCH Information, the first indication information is used to indicate the position of the first physical channel in the set of candidate physical channels, or the first indication information is used to indicate that the network device has not sent the first physical channel to the terminal device, so The first PDSCH and the first physical channel carry the same load; and the first PDSCH is sent to the terminal device according to the scheduling information.

In a feasible design, when the first indication information is used to indicate the position of the first physical channel in the set of candidate physical channels, the sending unit 41 sends the location information to the terminal device according to the scheduling information Before the first PDSCH, it is also used to send the first physical channel to the terminal device.

In a feasible design, the above data transmission device further includes:

The receiving unit 42, after the sending unit 41 sends the first PDSCH to the terminal device according to the scheduling information, is used to receive a positive response or a negative response sent by the terminal device on the resource indicated by the second indication information A response, wherein the second indication information is carried in the first PDCCH.

The data transmission apparatus provided in the embodiments of the present application can perform the actions of the network device in FIG. 5 and the optional embodiments described above. The implementation principles and technical effects are similar, and details are not described herein again.

It should be noted that it should be understood that the above receiving unit may be a receiver when actually implemented, and the sending unit may be a transmitter when actually implemented. The processing unit can be implemented in the form of software calling through processing elements; it can also be implemented in the form of hardware. For example, the processing unit may be a separately established processing element, or it may be implemented by being integrated in a chip of the above-mentioned device. In addition, it may also be stored in the memory of the above-mentioned device in the form of a program code. Call and execute the function of the above processing unit. In addition, all or part of these units can be integrated together or can be implemented independently. The processing element described herein may be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above units may be completed by instructions in the form of hardware integrated logic circuits or software in processor elements.

For example, the above units may be one or more integrated circuits configured to implement the above method, for example: one or more application specific integrated circuits (application specific integrated circuits, ASICs), or one or more microprocessors (digital signal processor (DSP), or, one or more field programmable gate arrays (field programmable gate array, FPGA), etc. As another example, when a certain unit above is implemented in the form of a processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call program code. As another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

11 is a schematic structural diagram of a data transmission device according to another embodiment of the present application. As shown in FIG. 11, the data transmission device 500 may include: a processor 51 (such as a CPU), a memory 52, a receiver 53, and a transmitter 54; both the receiver 53 and the transmitter 54 are coupled to the processor 51, and the processor 51 Controls the receiving operation of the receiver 53 and the processor 51 controls the sending operation of the transmitter 54; the memory 52 may include a high-speed random access memory (random-access memory, RAM), or may also include a non-volatile memory (non-volatile memory memory, NVM), for example, at least one magnetic disk memory, and various instructions can be stored in the memory 52 for performing various processing functions and implementing the method steps of the present application. Optionally, the data transmission device involved in this application may further include: a power supply 55 and a communication bus 56. The receiver 53 and the transmitter 54 may be integrated in the transceiver of the data transmission device, or may be an independent transceiver antenna on the data transmission device. The communication bus 56 is used to realize the communication connection between the elements.

In the embodiment of the present application, the above-mentioned memory 52 is used to store computer-executable program code, and the program code includes instructions; when the processor 51 executes the instructions, the processor 51 of the data transmission device is caused to perform the processing of the terminal device in the above method embodiment The action causes the receiver 53 to perform the receiving action of the terminal device in the above method embodiment, and causes the transmitter 54 to perform the sending action of the terminal device in the above method embodiment. The implementation principles and technical effects are similar, and will not be repeated here.

12 is a schematic structural diagram of yet another data transmission device according to an embodiment of the present application. As shown in FIG. 12, the data transmission device 600 may include: a processor 61 (such as a CPU), a memory 62, a receiver 63, and a transmitter 64; both the receiver 63 and the transmitter 64 are coupled to the processor 61, and the processor 61 Controls the receiving operation of the receiver 63, the processor 61 controls the sending operation of the transmitter 64; the memory 62 may include a high-speed random access memory (random-access memory, RAM), or may also include a non-volatile memory (non-volatile memory memory, NVM), for example, at least one magnetic disk memory, and various instructions can be stored in the memory 62 for performing various processing functions and implementing the method steps of the present application. Optionally, the data transmission device involved in the present application may further include: a communication bus 64. The receiver 63 and the transmitter 64 may be integrated in the transceiver of the data transmission device, or may be an independent transceiver antenna on the data transmission device. The communication bus 64 is used to implement communication connections between components.

In the embodiment of the present application, the above-mentioned memory 62 is used to store computer-executable program code, and the program code includes instructions; when the processor 61 executes the instructions, the processor 61 of the data transmission device is caused to perform the processing of the network device in the above method embodiment Action, causing the receiver 63 to perform the receiving action of the network device in the embodiment of FIG. 3 or the optional method described above, and causing the sender 64 to perform the sending action of the network device in the method embodiment described above. The implementation principles and technical effects are similar. Repeat again.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website, computer, server, or data center via a cable (e.g. Coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) to another website, computer, server or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), and so on.

The term "plurality" herein refers to two or more. The term "and / or" in this article is just an association relationship that describes an associated object, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists alone, A and B exist at the same time, exist alone B these three cases. In addition, the description mode "at least one of ..." means one of the listed items or any combination thereof, for example, "at least one of A, B, and C" may mean: there exists A alone, alone There are six situations: B, C alone, A and B, B and C, A and C, and A, B, and C. In addition, the character "/" in this article generally indicates that the related object is a "or" relationship; in the formula, the character "/" indicates that the related object is a "divide" relationship.

It can be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description, and are not used to limit the scope of the embodiments of the present application.

It can be understood that, in the embodiments of the present application, the size of the sequence numbers of the above processes does not mean that the execution order is sequential, and the execution order of each process should be determined by its function and internal logic, and should not be implemented for this application. The implementation process of the examples constitutes no limitation.

Claims

A data transmission method, characterized in that it includes:

Receiving a first physical downlink control channel PDCCH sent by a network device, where the first PDCCH carries downlink control information DCI, and the DCI includes scheduling information and first indication information for scheduling a first physical downlink shared channel PDSCH, and the first An indication information is used to indicate the position of the second PDCCH scheduling the second PDSCH in the candidate PDCCH set, or the first indication information is used to indicate that the network device does not send the second PDCCH or the second to the terminal device PDSCH, the first PDSCH and the second PDSCH carry the same load;

Receiving the first PDSCH sent by the network device according to the scheduling information;

The load is determined according to the first indication information and the first PDSCH.
The method according to claim 1, wherein before receiving the first PDSCH sent by the network device according to the scheduling information, the method further comprises:

Receiving a third PDCCH sent by the network device for scheduling a third PDSCH;

Receiving the third PDSCH sent by the network device according to the third PDCCH;

The determining the load according to the first indication information and the first PDSCH includes:

Determine, according to the first indication information, whether the positions of the second PDCCH and the third PDCCH in the candidate PDCCH set are the same;

If the third PDCCH and the second PDCCH have the same position in the candidate PDCCH set, determine the load according to the first PDSCH and the third PDSCH; and / or

If the positions of the third PDCCH and the second PDCCH in the candidate PDCCH set are different, the load is determined according to the first PDSCH.
The method according to claim 1, wherein the determining the load according to the first indication information and the first PDSCH comprises:

Determining whether the first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to a terminal device;

If the first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, the load is determined according to the first PDSCH.
The method according to any one of claims 1 to 3, wherein after determining the load according to the first indication information and the first PDSCH, the method further comprises:

Determine whether the load passes the CRC check;

If the load passes the CRC check, the terminal device sends a positive response to the network device on the resource indicated by the second indication information; and / or

If the load fails the CRC check, the terminal device sends a negative response to the network device on the resource indicated by the second indication information;

Wherein, the second indication information is carried in the first PDCCH.
A data transmission method, characterized in that it includes:

Sending a first physical downlink control channel PDCCH to a terminal device, where the first PDCCH carries downlink control information DCI, and the DCI includes scheduling information and first indication information for scheduling a first physical downlink shared channel PDSCH, the first The indication information is used to indicate the position of the second PDCCH scheduling the second PDSCH in the candidate PDCCH set, or the first indication information is used to indicate that the network device does not send the second PDCCH or the second PDSCH to the terminal device , The first PDSCH and the second PDSCH carry the same load;

The network device sends the first PDSCH scheduled by the scheduling information to the terminal device.
The method according to claim 5, wherein when the first indication information is used to indicate the position of the second PDCCH scheduling the second PDSCH in the candidate PDCCH set, the Before the terminal device sends the first PDSCH, it further includes:

Sending a second PDCCH for scheduling the second PDSCH to the terminal device;

Sending the second PDSCH to the terminal device according to the second PDCCH.
The method according to claim 5, wherein the first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, the first indication The information indicates that the network device has not sent the second PDCCH or the second PDSCH to the terminal device.
The method according to any one of claims 5 to 7, wherein after the sending the first PDSCH to the terminal device according to the scheduling information, the method further comprises:

Receiving a positive response or a negative response sent by the terminal device on the resource indicated by the second indication information, where the second indication information is carried in the first PDCCH.
A data transmission method, characterized in that it includes:

Receiving a first physical downlink control channel PDCCH sent by a network device, where the first PDCCH carries downlink control information DCI, and the DCI includes scheduling information and first indication information for scheduling a first physical downlink shared channel PDSCH, and the first An indication information is used to indicate the position of the first physical channel in the set of candidate physical channels, or the first indication information is used to indicate that the network device has not sent the first physical channel, the first PDSCH and The first physical channel carries the same load;

Receiving the first PDSCH sent by the network device according to the scheduling information;

The load is determined according to the first indication information and the first PDSCH.
The method according to claim 9, wherein before receiving the first PDSCH sent by the network device according to the scheduling information, the method further comprises:

Receiving a second physical channel sent by the network device;

The determining the load according to the first indication information and the first PDSCH includes:

Determine, according to the first indication information, whether the positions of the first physical channel and the second physical channel in the set of candidate physical channels are the same;

If the positions of the first physical channel and the second physical channel in the set of candidate physical channels are the same, determining the load according to the first PDSCH and the second physical channel; and / or

If the positions of the first physical channel and the second physical channel in the set of candidate physical channels are different, the load is determined according to the first PDSCH.
The method according to claim 10, wherein the receiving the second physical channel sent by the network device comprises:

Determining whether there is a candidate physical channel in the candidate physical channel set that can be checked by a cyclic redundancy check code CRC, the payload of the candidate physical channel in the candidate physical channel set includes a transport block and control information, the control The information is used to indicate the resources used by the terminal device to send the response information;

If there is a candidate physical channel that can pass the CRC check in the candidate physical channel set, the candidate physical channel that passes the CRC check is used as the second physical channel, and a positive response is sent to the network device ; And / or

If there is no candidate physical channel in the candidate physical channel set that can pass the CRC check, then M candidate physical channels in the candidate physical channel set are cached, where M≥0 and an integer.
The method according to claim 11, wherein if the first physical channel and the second physical channel have the same position in the set of candidate physical channels, then according to the first PDSCH and the first Two physical channels determine the payload, including:

If the first physical channel and the buffered one of the M candidate physical channels have the same position in the set of candidate physical channels, then the M candidate physical channels are the same as the first The candidate physical channel with the same physical channel position as the second physical channel;

The load is determined according to the first PDSCH and the second physical channel.
The method according to claim 11 or 12, wherein the M is predefined; or,

The M is configured by the network device for the terminal device through high-level signaling.
The method according to any one of claims 11 to 13, wherein if there is no candidate physical channel that can pass the CRC check in the candidate physical channel set, the terminal device caches at least M candidate physical channels ,include:

The terminal device determines M candidate physical channels from the set of candidate physical channels according to the autocorrelation threshold and caches them.
The method according to claim 9, wherein the determining the load according to the first indication information and the first PDSCH comprises:

Determining whether the first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to a terminal device,

If the first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, the load is determined according to the first PDSCH.
The method according to any one of claims 9 to 15, wherein after determining the load according to the first indication information and the first PDSCH, the method further comprises:

Determine whether the load passes the CRC check;

If the payload passes the CRC check, then send a positive response to the network device on the resource indicated by the second indication information; and / or

If the load fails the CRC check, send a negative response to the network device on the resource indicated by the second indication information;

Wherein, the second indication information is carried in the first PDCCH.
A data transmission method, characterized in that it includes:

Sending a first physical downlink control channel PDCCH to a terminal device, where the first PDCCH carries downlink control information DCI, and the DCI includes scheduling information and first indication information for scheduling a first physical downlink shared channel PDSCH, the first The indication information is used to indicate the position of the first physical channel in the set of candidate physical channels, or the first indication information is used to indicate that the network device has not sent the first physical channel, the first PDSCH and all The first physical channel carries the same load;

Sending the first PDSCH to the terminal device according to the scheduling information.
The method according to claim 17, wherein when the first indication information is used to indicate the position of the first physical channel in the set of candidate physical channels, the sending according to the scheduling information to the terminal device Before the first PDSCH, it also includes:

Sending the first physical channel to the terminal device.
The method according to claim 17 or 18, wherein after sending the first PDSCH to the terminal device according to the scheduling information, further comprising:

Receiving a positive response or a negative response sent by the terminal device on the resource indicated by the second indication information, where the second indication information is carried in the first PDCCH.
A data transmission device, characterized in that it includes:

A receiving unit, configured to receive a first physical downlink control channel PDCCH sent by a network device, where the first PDCCH carries downlink control information DCI, and the DCI includes scheduling information and a first indication for scheduling a first physical downlink shared channel PDSCH Information, the first indication information is used to indicate the position of the second PDCCH scheduling the second PDSCH in the candidate PDCCH set, or the first indication information is used to indicate that the network device has not sent the second PDCCH to the terminal device Or the second PDSCH, the first PDSCH and the second PDSCH carry the same load;

A sending unit, configured to receive the first PDSCH sent by the network device according to the scheduling information;

The processing unit is configured to determine the load according to the first indication information and the first PDSCH.
The device according to claim 20, characterized in that

The receiving unit, before receiving the first PDSCH sent by the network device according to the scheduling information, is further configured to receive a third PDCCH sent by the network device for scheduling a third PDSCH; according to the first Three PDCCH receiving the third PDSCH sent by the network device;

The processing unit is specifically configured to determine whether the positions of the second PDCCH and the third PDCCH in the candidate PDCCH set are the same according to the first indication information; if the third PDCCH and the third If the two PDCCHs have the same position in the candidate PDCCH set, the load is determined according to the first PDSCH and the third PDSCH; and / or if the third PDCCH and the second PDCCH are in the If the positions in the candidate PDCCH set are different, the load is determined according to the first PDSCH.
The device according to claim 20, characterized in that

The processing unit is specifically configured to determine whether the first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to a terminal device; if the first indication information is an indication If the network device does not send the value of the second PDCCH or the second PDSCH to the terminal device, the load is determined according to the first PDSCH.
The device according to any one of claims 20 to 22, characterized in that

The sending unit, after the processing unit determines the load according to the first indication information and the first PDSCH, is also used to determine whether the load passes the CRC check; if the load passes the CRC Check, send a positive response to the network device on the resource indicated by the second indication information; and / or, if the load fails the CRC check, send a response to the resource indicated by the second indication information The network device sends a negative response; wherein, the second indication information is carried in the first PDCCH.
A data transmission device, characterized in that it includes:

A sending unit, configured to send a first physical downlink control channel PDCCH to a terminal device, where the first PDCCH carries downlink control information DCI, and the DCI includes scheduling information and first indication information for scheduling a first physical downlink shared channel PDSCH , The first indication information is used to indicate the position of the second PDCCH scheduling the second PDSCH in the candidate PDCCH set, or the first indication information is used to indicate that the network device has not sent the second PDCCH or the terminal device The second PDSCH, the first PDSCH, and the second PDSCH carry the same load; and the first PDSCH scheduled by the scheduling information is sent to the terminal device.
The device according to claim 24, characterized in that

Before the first indication information is used to indicate the position of the second PDCCH scheduling the second PDSCH in the candidate PDCCH set, the sending unit sends Used to send a second PDCCH for scheduling a second PDSCH to the terminal device; sending the second PDSCH to the terminal device according to the second PDCCH.
The apparatus according to claim 24, wherein the first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, the first indication The information indicates that the network device has not sent the second PDCCH or the second PDSCH to the terminal device.
The device according to any one of claims 24 to 26, further comprising:

A receiving unit, configured to receive, after the sending unit sends the first PDSCH to the terminal device according to the scheduling information, a positive response or a negative response sent by the terminal device on the resource indicated by the second indication information, Wherein, the second indication information is carried in the first PDCCH.
A data transmission device, characterized in that it includes:

A receiving unit, configured to receive a first physical downlink control channel PDCCH sent by a network device, where the first PDCCH carries downlink control information DCI, and the DCI includes scheduling information and a first indication for scheduling a first physical downlink shared channel PDSCH Information, the first indication information is used to indicate the position of the first physical channel in the set of candidate physical channels, or the first indication information is used to indicate that the network device has not sent the first physical channel to the terminal device, so The first PDSCH and the first physical channel carry the same load; receiving the first PDSCH sent by the network device according to the scheduling information;

The processing unit is configured to determine the load according to the first indication information and the first PDSCH.
The device according to claim 28, characterized in that

The receiving unit is further configured to receive a second physical channel sent by the network device before receiving the first PDSCH sent by the network device according to the scheduling information;

The processing unit is specifically configured to determine whether the positions of the first physical channel and the second physical channel in the set of candidate physical channels are the same according to the first indication information; if the first physical channel And the second physical channel are in the same position in the set of candidate physical channels, the load is determined according to the first PDSCH and the second physical channel; and / or, if the first physical channel and If the position of the second physical channel in the set of candidate physical channels is different, the load is determined according to the first PDSCH.
The device according to claim 29, characterized in that

The processing unit is further configured to determine whether there is a candidate physical channel in the candidate physical channel set that can be checked by a cyclic redundancy check code CRC, and the payload of the candidate physical channel in the candidate physical channel set includes transmission Block and control information, the control information is used to indicate the resources used by the terminal device to send the response information; if there is a candidate physical channel in the candidate physical channel set that can pass the CRC check, the pass CRC One candidate physical channel that is verified as the second physical channel; and / or, if there is no candidate physical channel that can pass the CRC check in the set of candidate physical channels, the M in the set of candidate physical channels is cached Candidate physical channels, M≥0 and an integer;

The sending unit is also used to send a positive response to the network device when there is a candidate physical channel that can pass the CRC check in the candidate physical channel set.
The apparatus according to claim 30, wherein if the first physical channel and the second physical channel have the same position in the candidate physical channel set, the processing unit is specifically used to Among the M candidate physical channels, a candidate physical channel at the same position as the first physical channel is used as a second physical channel; and the load is determined according to the first PDSCH and the second physical channel.
The apparatus according to claim 30 or 31, wherein the M is predefined; or, the M is configured by the network device for the terminal device through high-level signaling.
The device according to any one of claims 30 to 32, characterized in that

When the processing unit caches the M candidate physical channels, it is specifically used to determine and cache the M candidate physical channels from the set of candidate physical channels according to the autocorrelation threshold.
The device according to claim 28, characterized in that

The processing unit is specifically configured to determine whether the first indication information is a value indicating that the network device has not sent the second PDCCH or the second PDSCH to the terminal device, if the first indication information is an indication If the network device does not send the value of the second PDCCH or the second PDSCH to the terminal device, the load is determined according to the first PDSCH.
The device according to any one of claims 28 to 34, characterized in that

The processing unit, after determining the load according to the first indication information and the first PDSCH, is also used to determine whether the load passes the CRC check;

The sending unit is configured to send a positive response to the network device on the resource indicated by the second indication information if the load passes the CRC check; and / or if the load fails the CRC check , Then send a negative response to the network device on the resource indicated by the second indication information; wherein, the second indication information is carried in the first PDCCH.
A data transmission device, characterized in that it includes:

A sending unit, configured to send a first physical downlink control channel PDCCH to a terminal device, where the first PDCCH carries downlink control information DCI, and the DCI includes scheduling information and first indication information for scheduling a first physical downlink shared channel PDSCH , The first indication information is used to indicate the position of the first physical channel in the set of candidate physical channels, or the first indication information is used to indicate that the network device has not sent the first physical channel to the terminal device, the The first PDSCH and the first physical channel carry the same load; the first PDSCH is sent to the terminal device according to the scheduling information.
The apparatus according to claim 36, wherein when the first indication information is used to indicate the position of the first physical channel in the set of candidate physical channels, the sending unit, according to the scheduling information, Before the terminal device sends the first PDSCH, it is also used to send the first physical channel to the terminal device.
The device according to claim 36 or 37, further comprising:

A receiving unit, after the sending unit sends the first PDSCH to the terminal device according to the scheduling information, for receiving a positive response or a negative response sent by the terminal device on the resource indicated by the second indication information, Wherein, the second indication information is carried in the first PDCCH.
A computer-readable storage medium, characterized in that it is used to store a computer program or instruction, and when the computer program or instruction runs on a terminal device, the terminal device is caused to perform any one of claims 1 to 4. Methods.
A computer-readable storage medium, characterized in that it is used to store a computer program or instruction, and when the computer program or instruction runs on a network device, it causes the network device to execute any one of claims 5 to 8. Methods.
A computer-readable storage medium, characterized in that it is used to store a computer program or instruction, and when the computer program or instruction runs on a terminal device, the terminal device executes any one of claims 9-16 Methods.
A computer-readable storage medium, characterized in that it is used to store a computer program or instruction, and when the computer program or instruction runs on a network device, the network device is allowed to execute any one of claims 17 to 19. Methods.
A computer program product, characterized in that, when the computer program product runs on a terminal device, the terminal device is caused to perform the method according to any one of claims 1 to 4.
A computer program product, characterized in that, when the computer program product runs on a network device, the network device is caused to perform the method according to any one of claims 5 to 8.
A computer program product, characterized in that, when the computer program product runs on a terminal device, the terminal device is caused to perform the method according to any one of claims 9 to 16.
A computer program product, characterized in that, when the computer program product runs on a network device, the network device is caused to perform the method according to any one of claims 17 to 19.