CN114342286A

CN114342286A - Data transmission method and communication equipment

Info

Publication number: CN114342286A
Application number: CN201980099186.1A
Authority: CN
Inventors: 毕文平; 余政; 杨育波; 程型清
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2022-04-12
Also published as: WO2021035450A1

Abstract

An embodiment of the present application provides a data transmission method and a communication device, where the data transmission method includes: the method comprises the steps that a first communication device receives control information sent by a second communication device, and the control information indicates an index of a first HARQ process corresponding to first data transmission; the first communication equipment determines the index of the first HARQ process according to the control information; the first communication equipment determines a starting time unit used by first data transmission according to an ending time unit and a first time delay of the control information, when an index of a first HARQ process belongs to a first set, the first communication equipment determines that the first time delay is a first value time unit, when the index of the first HARQ process belongs to a second set, the first communication equipment determines that the first time delay is the first value time unit or the second value time unit, and the first set and the second set comprise indexes of different HARQ processes; the first communication device receives first data according to the determined start time unit.

Description

Data transmission method and communication equipment

Technical Field

The embodiment of the application relates to the field of communication, in particular to a data transmission method and communication equipment.

Background

In the current enhanced machine type communication (eMTC) system, a time period from when downlink control information is received to when downlink data transmission starts needs to be used by two subframes. After the downlink data transmission is completed, the terminal device needs to feed back, on the uplink control channel, HARQ-ACK (hybrid automatic repeat request-acknowledgement) information whether the transmission is successful. When the downlink control channel supports 10 HARQ processes or HARQ bundling, the time for the terminal device to feed back the HARQ-ACK is indicated by a HARQ-ACK delay (delay) field in the downlink control information, and the number of Transport Blocks (TBs) for HARQ bundling may be up to 4.

For a system supporting 10 HARQ processes (processes), there is a problem of insufficient resource utilization. For example, downlink control information is transmitted through a Machine Physical Downlink Control Channel (MPDCCH), downlink data is transmitted through a Physical Downlink Shared Channel (PDSCH), the MPDCCH has an interval of two subframes from the PDSCH, and the two subframes are not used for data transmission, thereby causing resource waste.

In order to solve the problem of resource waste, 14HARQ processes are introduced into a downlink control channel, and the scheduling delay from the MPDCCH to the PDSCH is fixed to 2 subframes at present and cannot be used for the scheduling delay from the MPDCCH to the PDSCH when 14HARQ processes are used.

Disclosure of Invention

The embodiment of the application provides a data transmission method and communication equipment, which are used for determining time delay when a plurality of HARQ processes exist and realizing correct reception of data sent by second communication equipment.

In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:

in a first aspect, an embodiment of the present application provides a data transmission method, including: the method comprises the steps that a first communication device receives control information sent by a second communication device, wherein the control information indicates an index of a first hybrid automatic repeat request (HARQ) process corresponding to first data transmission; the first communication equipment determines the index of the first HARQ process according to the control information; the first communication device determines a starting time unit used for the first data transmission according to an ending time unit and a first time delay of the control information, wherein when the index of the first HARQ process belongs to a first set, the first communication device determines that the first time delay is a first value of time unit, and when the index of the first HARQ process belongs to a second set, the first communication device determines that the first time delay is the first value of time unit or a second value of time unit, the first value is not equal to the second value, and the first set and the second set comprise indexes of different HARQ processes; the first communication device receives the first data according to the determined starting time unit. In this embodiment, both the first communication device and the second communication device may determine a starting time unit used for the first data transmission according to an end time unit and a first time delay of the control information, where the first communication device determines that the first time delay is a first number of time units when an index of the first HARQ process belongs to a first set, and determines that the first time delay is the first number of time units or a second number of time units when the index of the first HARQ process belongs to a second set, where the first number is not equal to the second number, and the first set and the second set include indexes of different HARQ processes. Therefore, the specific value of the first delay can be determined according to whether the index of the first HARQ process belongs to the first set or the second set, and the specific value of the first delay is the delay that can be determined by the first communication device and the second communication device, so that the first communication device can correctly receive the first data, the complexity of a receiving algorithm of the first communication device is reduced, the complexity of a sending algorithm of the second communication device is also reduced, the indication flexibility is improved, the signaling overhead is reduced, and the resource utilization rate of the system is improved.

In a first possible implementation manner, the method further includes: the first communication device receives first information sent by the second communication device, wherein the first information is used for indicating that the index of the first HARQ process can or cannot belong to the second set; on a condition that the first information indicates that the index of the first HARQ process can belong to the second set, when the index of the first HARQ process belongs to the first set, the first communication device determines that the transmission of the first data adopts an asynchronous HARQ manner; and when the index of the first HARQ process belongs to a second set, the first communication equipment determines that the transmission of the first data adopts a synchronous HARQ mode. In a case that the first information indicates that the index of the first HARQ process can belong to the second set, which HARQ scheme is used for transmission of the first data may be determined by that the index of the first HARQ process belongs to the second set, or that the index of the first HARQ process belongs to the first set, for example, when the index of the first HARQ process belongs to the first set, the transmission of the first data uses an asynchronous HARQ scheme, and when the index of the first HARQ process belongs to the second set, the transmission of the first data uses a synchronous HARQ scheme. The second communication device can indicate the HARQ mode adopted by the first data transmission to the first communication device through the value size of the index of the first HARQ process, so that the indicating efficiency of the HARQ mode is improved.

In a second aspect, an embodiment of the present application further provides a data transmission method, including: the second communication equipment determines an index of a first hybrid automatic repeat request (HARQ) process corresponding to the first data transmission; the second communication device sends control information to the first communication device, wherein the control information indicates an index of the first HARQ process; the second communication device determines a starting time unit used for the first data transmission according to an ending time unit and a first time delay of the control information, wherein when the index of the first HARQ process belongs to a first set, the second communication device determines that the first time delay is a first value of time unit, and when the index of the first HARQ process belongs to a second set, the second communication device determines that the first time delay is the first value of time unit or a second value of time unit, the first value is not equal to the second value, and the first set and the second set comprise indexes of different HARQ processes; and the second communication equipment sends the first data according to the determined starting time unit. In this embodiment, both the first communication device and the second communication device may determine a starting time unit used for the first data transmission according to an end time unit and a first time delay of the control information, where the first communication device determines that the first time delay is a first number of time units when an index of the first HARQ process belongs to a first set, and determines that the first time delay is the first number of time units or a second number of time units when the index of the first HARQ process belongs to a second set, where the first number is not equal to the second number, and the first set and the second set include indexes of different HARQ processes. Therefore, the specific value of the first delay can be determined according to whether the index of the first HARQ process belongs to the first set or the second set, and the specific value of the first delay is the delay that can be determined by the first communication device and the second communication device, so that the first communication device can correctly receive the first data, the complexity of a receiving algorithm of the first communication device is reduced, the complexity of a sending algorithm of the second communication device is also reduced, the indication flexibility is improved, the signaling overhead is reduced, and the resource utilization rate of the system is improved.

In a first possible implementation manner, the method further includes: the second communication device sends first information to the first communication device, wherein the first information is used for indicating that the index of the first HARQ process can or cannot belong to the second set; on the condition that the first information indicates that the index of the first HARQ process can belong to the second set, when the index of the first HARQ process belongs to the first set, the second communication device determines that the transmission of the first data adopts an asynchronous HARQ mode; and when the index of the first HARQ process belongs to a second set, the second communication equipment determines that the transmission of the first data adopts a synchronous HARQ mode. In a case that the first information indicates that the index of the first HARQ process can belong to the second set, which HARQ scheme is used for transmission of the first data may be determined by that the index of the first HARQ process belongs to the second set, or that the index of the first HARQ process belongs to the first set, for example, when the index of the first HARQ process belongs to the first set, the transmission of the first data uses an asynchronous HARQ scheme, and when the index of the first HARQ process belongs to the second set, the transmission of the first data uses a synchronous HARQ scheme. The second communication device can indicate the HARQ mode adopted by the first data transmission to the first communication device through the value size of the index of the first HARQ process, so that the indicating efficiency of the HARQ mode is improved.

In a first possible implementation manner, the control information includes: a first field indicating a HARQ acknowledgement delay when the index of the first HARQ process belongs to the first set; the first field includes transmission information of a set of transmission blocks, or the first field is a reserved field, when the index of the first HARQ process belongs to the second set. In this scheme, when the index of the first HARQ process belongs to the first set, the HARQ acknowledgement delay is indicated by the first field, so that when the second communication device sends the control information, the control information carries the first field, and the first communication device analyzes the first field in the control information to obtain the HARQ acknowledgement delay, and the first communication device may perform uplink feedback according to the HARQ acknowledgement delay. When the index of the first HARQ process belongs to the second set, the HARQ ack/nack delay may be a predefined delay value, for example, the HARQ ack/nack delay may be 13 time units, where the first field in the control information is not required for transmitting the HARQ ack/nack delay, and the first field may be a reserved field, that is, the bit state of the first field is reserved. Or the first field comprises transmission information for a set of transport blocks, which may be scheduled (or corresponding) to other HARQ processes in the second set than the first HARQ process.

In a first possible implementation manner, when the index of the first HARQ process belongs to the second set, the first field includes N bits, where N is a positive integer; the N bits of the first field indicate whether each transport block in the transport block set is scheduled by means of a bitmap. The first field may include N bits, for example, the value of N may be 3 bits, or 4 bits, and the like. The N bits of the first field indicate whether each transport block in the transport block set is scheduled by means of a bitmap, e.g. the first field comprises 3 bits, then the 3 bits may indicate whether 3 transport blocks scheduled by 3 HARQ processes are scheduled, where scheduled may be denoted as transmitted. For example, a bit of the first field is 0 to indicate that the transport block is not scheduled, and a bit of the first field is 1 to indicate that the transport block is scheduled.

In a first possible implementation manner, the control information includes: a second field and a third field, wherein the second field indicates the second number of time units and the index of the first HARQ process or indicates the first number of time units and the index of the first HARQ process when the high S bits of the third field indicate the first state; and/or a second state indicated by the low T bits of the third field is used to determine transmission information of a transport block; wherein S and T are positive integers. In this embodiment of the application, the second field may indicate the first delay and the index of the first HARQ process at the same time, so that the first communication device determines the first delay and the index of the first HARQ process by analyzing the second field of the control information. A second state indicated by the low T bits of the third field, where the second state is used to determine transmission information of a transport block, where the transport block may be a transport block scheduled by another HARQ process in the second set except the first HARQ process, for example, an index of the second HARQ process is also included in the second set, and then the set of transport blocks included in the first field refers to a transport block scheduled by the second HARQ process.

In a first possible implementation manner, the value of T is 2, and the lower 2 bits of the third field are a first bit and a second bit; the first bit indicates whether the transport block is scheduled, and the second bit indicates whether the transport block is a newly transmitted transport block or a retransmitted transport block. For example, the lower 2 bits of the third field are used to indicate the scheduling information corresponding to the second HARQ process, and the second HARQ process belongs to the second set. The low-order 2 bits are used for indicating scheduling information corresponding to the second HARQ process, and include 1 bit indicating whether the second HARQ process is scheduled, and 1 bit indicating NDI.

In a first possible implementation manner, the HARQ acknowledgement delay includes: d time units, wherein the value of D is 13,14,15, 17 or 19. Wherein, the HARQ acknowledgement delay is a first value, for example, the first value is 13,14,15, 17, or 19. At this time, a scenario supporting multiple HARQ can be adapted, when a scenario supporting 14HARQ is supported, the first time delay from MPDCCH to PDSCH is large, for example, 7, which results in that the feedback from PDSCH to HARQ-ACK can only be carried on a PUCCH subframe with a larger time delay, and the value 13 is the first PUCCH subframe that can be used by PDSCH, in order to balance HARQ-ACK information carried by different PUCCHs, therefore, the HARQ acknowledgement response time delay can also have the equivalent of 14,15, and 16, so that HARQ-ACK can be fed back, and loads carried on different PUCCH resources can be relatively balanced.

In a first possible implementation manner, when the first delay is a first number of time units, the control information indicates that a HARQ acknowledgement delay is determined from a first acknowledgement delay set; when the first delay is a second number of time units, the control information indicates that a HARQ acknowledgement delay is determined from a second set of acknowledgement delays; wherein the first set of acknowledgement delays and the second set of acknowledgement delays comprise different HARQ acknowledgement delays. In this embodiment of the present application, both the first communication device and the second communication device may determine two sets of acknowledgement delays in advance, for example, the two sets of acknowledgement delays may be: a first set of acknowledgement delays and a second set of acknowledgement delays, the first set of acknowledgement delays and the second set of acknowledgement delays comprising different HARQ acknowledgement delays. When the first time delay is a second number of time units, the index of the first HARQ process belongs to the second set, and the HARQ acknowledgement delay may determine from which acknowledgement delay set to acquire according to the number of time units of the first time delay. In the embodiment of the application, the value range of the HARQ acknowledgement delay can be determined only by determining the number of time units included in the first time delay by the first communication device and the second communication device, so that the complexity of determining the HARQ acknowledgement delay is simplified.

In a first possible implementation manner, the first acknowledgement delay set includes at least one of the following values: 4. 5,6,7,8,9, 10,11,13,15, 17; the second set of acknowledgement delays comprises at least one of the following values: 13. 14,15,16,19, 26. In the scheme, when the first delay is large, for example, the first delay is a second number of time units, for example, the first delay is 7 time units, so that the PDSCH-to-HARQ-ACK feedback can only be carried on a PUCCH subframe with a larger delay, and the value 13 is the first PUCCH subframe that can be used by the PDSCH, in order to balance HARQ-ACK information carried by different PUCCHs, the values of 14,15 and 16 can also be taken, so that not only HARQ-ACK feedback can be performed, but also loads carried on different PUCCH resources are relatively balanced. And when the first delay is small, for example, the first delay is a first number of time units, for example, the first delay is 2 time units, the HARQ-ACK feedback delay is also small, and can be configured more flexibly. Therefore, the minimum value of the second acknowledgement delay set is greater than the minimum value of the first acknowledgement delay set, and the two delays are designed to better adapt to different scheduling delays, so that the flexibility of feedback delay indication under different scheduling delays is improved.

In a first possible implementation manner, the control information includes: a fourth field, wherein the fourth field indicates a HARQ acknowledgement delay when the index of the first HARQ process belongs to the first set; the fourth field indicates the second number of time units and the HARQ acknowledgement delay, or indicates the first number of time units and the HARQ acknowledgement delay, when the index of the first HARQ process belongs to the second set. In this scheme, when the index of the first HARQ process belongs to the first set, the HARQ acknowledgement delay is indicated by the fourth field, so that when the second communication device sends control information, the control information carries the fourth field, and the first communication device analyzes the fourth field in the control information to obtain the HARQ acknowledgement delay, and the first communication device may perform uplink feedback according to the HARQ acknowledgement delay. When the index of the first HARQ process belongs to the second set, the HARQ acknowledgement delay may be one delay value, for example, the HARQ acknowledgement delay may be 13 time units, and a fourth field in the control information is used to transmit the HARQ acknowledgement delay. In this embodiment of the application, the fourth field may indicate the first delay and the HARQ acknowledgement delay at the same time, so that the first communication device determines the first delay and the HARQ acknowledgement delay by analyzing the fourth field of the control information.

In a first possible implementation manner, when the index of the first HARQ process belongs to the second set, the fourth field includes Q bits, and Q is a positive integer; q bits of the fourth field indicate the first delay in a first set of delays and indicate the HARQ acknowledgement delay in a third set of acknowledgement delays; wherein the first set of time delays comprises at least one of the following values: 2. p is a positive integer greater than or equal to 7; the third set of acknowledgement delays comprises at least one of the following values: 4. 5, 7 and 13. Specifically, the fourth field includes Q bits, where the Q bits indicate a first delay in a first delay set, and the first delay set includes at least one of the following values: 2. p, which is a positive integer greater than or equal to 7, may be predefined or higher-level configured. The first delay may therefore be 2 time units, or the first delay may be 7 time units, or the first delay may be a time unit greater than 7. When 14HARQ processes are introduced, the first delay is minimum 7 subframes, and when ACK feedback occupies more time, in order to accurately and flexibly schedule a transport block, the first delay greater than or equal to 7 needs to be introduced.

In a first possible implementation, the first set is {0,1,2,3,4,5,6,7,8,9}, and the second set is {10,11,12,13 }; or, the first set is {0,1,2,3,4,5,6,7,8,9}, and the second set is {12,13,14,15 }. In the scheme, the indexes of the HARQ processes included in the first set and the indexes of the HARQ processes included in the second set are consecutive, so that the first set and the second set have 14 indexes of the HARQ processes in total. The index of the first HARQ process indicated by the control information may belong to the first set or belong to the second set, and the index of the first HARQ process is determined specifically according to an application scenario. Or when the index of the HARQ process is 0,1,2,3,4,5,6,7,8,9, the index of the HARQ process belongs to the first set, and when the index of the HARQ process is 12,13,14,15, the index of the HARQ process belongs to the second set, in the scheme, the index of the HARQ process included in the first set and the index of the HARQ process included in the second set are discontinuous, and the first set and the second set sum up to have 14 indexes of the HARQ processes. The index of the first HARQ process indicated by the control information may belong to the first set or belong to the second set, and the index of the first HARQ process is determined specifically according to an application scenario.

In a first possible implementation manner, the first value is 2, and the second value is 7. In the scheme, the specific value of the first delay can be determined according to whether the index of the first HARQ process belongs to the first set or the second set, and the specific value of the first delay is the delay that can be determined by the first communication device and the second communication device, so that the first terminal device can correctly receive the first data, the complexity of a receiving algorithm of the first communication device is reduced, the complexity of a sending algorithm of the second communication device is also reduced, the flexibility of indication is improved, the signaling overhead is reduced, and the resource utilization rate of the system is improved.

In a third aspect, an embodiment of the present application further provides a communication device, where the communication device is specifically a first communication device, and the first communication device includes: the system comprises a processing module and a transceiver module, wherein the transceiver module is used for receiving control information sent by second communication equipment, and the control information indicates an index of a first hybrid automatic repeat request (HARQ) process corresponding to first data transmission; the processing module is configured to determine an index of the first HARQ process according to the control information; the processing module is configured to determine a starting time unit used for the first data transmission according to an ending time unit and a first time delay of the control information, where the first communication device determines that the first time delay is a first number of time units when the index of the first HARQ process belongs to a first set, and determines that the first time delay is the first number of time units or a second number of time units when the index of the first HARQ process belongs to a second set, where the first number is not equal to the second number, and the first set and the second set include indexes of different HARQ processes; the transceiver module is configured to receive the first data according to the determined start time unit.

In a first possible implementation manner, the transceiver module is configured to receive first information sent by the second communications device, where the first information is used to indicate that an index of the first HARQ process may or may not belong to the second set; the processing module is configured to determine that the transmission of the first data adopts an asynchronous HARQ scheme when the index of the first HARQ process belongs to the first set under the condition that the first information indicates that the index of the first HARQ process can belong to the second set; and when the index of the first HARQ process belongs to a second set, determining that the transmission of the first data adopts a synchronous HARQ mode.

In a third aspect of the present application, the constituent modules of the first communication device may further perform the steps described in the foregoing first aspect and various possible implementations, for details, see the foregoing description of the first aspect and various possible implementations.

In a fourth aspect, an embodiment of the present application further provides a communication device, where the communication device is specifically a second communication device, and the second communication device includes: the system comprises a processing module and a receiving and sending module, wherein the processing module is used for determining an index of a first hybrid automatic repeat request (HARQ) process corresponding to first data transmission; the transceiver module is configured to send control information to a first communication device, where the control information indicates an index of the first HARQ process; the processing module is configured to determine a starting time unit used for the first data transmission according to an ending time unit and a first time delay of the control information, where the second communication device determines that the first time delay is a first number of time units when the index of the first HARQ process belongs to a first set, and determines that the first time delay is the first number of time units or a second number of time units when the index of the first HARQ process belongs to a second set, where the first number is not equal to the second number, and the first set and the second set include indexes of different HARQ processes; and the transceiver module is used for transmitting the first data according to the determined starting time unit.

In a first possible implementation manner, the transceiver module is configured to send, to the first communication device, first information, where the first information is used to indicate that an index of the first HARQ process may or may not belong to the second set; the processing module is configured to, when the first information indicates that the index of the first HARQ process can belong to the second set, transmit the first data in an asynchronous HARQ manner when the index of the first HARQ process belongs to the first set; and when the index of the first HARQ process belongs to a second set, the transmission of the first data adopts a synchronous HARQ mode.

In a first possible implementation manner, the control information includes: a first field indicating a HARQ acknowledgement delay when the index of the first HARQ process belongs to the first set; the first field includes transmission information of a set of transmission blocks, or the first field is a reserved field, when the index of the first HARQ process belongs to the second set.

In a first possible implementation manner, when the index of the first HARQ process belongs to the second set, the first field includes N bits, where N is a positive integer; the N bits of the first field indicate whether each transport block in the transport block set is scheduled by means of a bitmap.

In a first possible implementation manner, the control information includes: a second field and a third field, wherein the second field indicates the second number of time units and the index of the first HARQ process or indicates the first number of time units and the index of the first HARQ process when the high S bits of the third field indicate the first state; and/or a second state indicated by the low T bits of the third field is used to determine transmission information of a transport block; wherein S and T are positive integers.

In a first possible implementation manner, the value of T is 2, and the lower 2 bits of the third field are a first bit and a second bit; the first bit indicates whether the transport block is scheduled, and the second bit indicates whether the transport block is a newly transmitted transport block or a retransmitted transport block.

In a first possible implementation manner, the HARQ acknowledgement delay includes: d time units, wherein the value of D is 13,14,15, 17 or 19.

In a first possible implementation manner, when the first delay is a first number of time units, the control information indicates that a HARQ acknowledgement delay is determined from a first acknowledgement delay set; when the first delay is a second number of time units, the control information indicates that a HARQ acknowledgement delay is determined from a second set of acknowledgement delays; wherein the first set of acknowledgement delays and the second set of acknowledgement delays comprise different HARQ acknowledgement delays.

In a first possible implementation manner, the first acknowledgement delay set includes at least one of the following values: 4. 5,6,7,8,9, 10,11,13,15, 17; the second set of acknowledgement delays comprises at least one of the following values: 13. 14,15,16,19, 26.

In a first possible implementation manner, the control information includes: a fourth field, wherein the fourth field indicates a HARQ acknowledgement delay when the index of the first HARQ process belongs to the first set; the fourth field indicates the second number of time units and the HARQ acknowledgement delay, or indicates the first number of time units and the HARQ acknowledgement delay, when the index of the first HARQ process belongs to the second set.

In a first possible implementation manner, when the index of the first HARQ process belongs to the second set, the fourth field includes Q bits, and Q is a positive integer; q bits of the fourth field indicate the first delay in a first set of delays and indicate the HARQ acknowledgement delay in a third set of acknowledgement delays; wherein the first set of time delays comprises at least one of the following values: 2. p is a positive integer greater than or equal to 7; the third set of acknowledgement delays comprises at least one of the following values: 4. 5, 7 and 13.

In a first possible implementation, the first set is {0,1,2,3,4,5,6,7,8,9}, and the second set is {10,11,12,13 }; or, the first set is {0,1,2,3,4,5,6,7,8,9}, and the second set is {12,13,14,15 }.

In a first possible implementation manner, the first value is 2, and the second value is 7.

In a fourth aspect of the present application, the constituent modules of the second communication device may further perform the steps described in the foregoing second aspect and various possible implementations, for details, see the foregoing description of the second aspect and various possible implementations.

In a fifth aspect, the present invention provides a computer-readable storage medium having stored therein instructions, which, when executed on a computer, cause the computer to perform the method of the first or second aspect.

In a sixth aspect, embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first or second aspect.

In a seventh aspect, an embodiment of the present application provides a communication device, where the communication device may include an entity such as a terminal device or a network device, and the communication device includes: a processor, a memory; the memory is to store instructions; the processor is configured to execute the instructions in the memory to cause the communication device to perform the method of any of the preceding first or second aspects.

In an eighth aspect, the present application provides a chip system comprising a processor for enabling a communication device to implement the functions referred to in the above aspects, e.g. to transmit or process data and/or information referred to in the above methods. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the communication device. The chip system may be formed by a chip, or may include a chip and other discrete devices.

According to the technical scheme, the embodiment of the application has the following advantages:

in this embodiment, both the first communication device and the second communication device may determine a starting time unit used for the first data transmission according to an end time unit and a first time delay of the control information, where the first communication device determines that the first time delay is a first number of time units when an index of the first HARQ process belongs to a first set, and determines that the first time delay is the first number of time units or a second number of time units when the index of the first HARQ process belongs to a second set, where the first number is not equal to the second number, and the first set and the second set include indexes of different HARQ processes. Therefore, the specific value of the first delay can be determined according to whether the index of the first HARQ process belongs to the first set or the second set, and the specific value of the first delay is the delay that can be determined by the first communication device and the second communication device, so that the first communication device can correctly receive the first data, the complexity of a receiving algorithm of the first communication device is reduced, the complexity of a sending algorithm of the second communication device is also reduced, the indication flexibility is improved, the signaling overhead is reduced, and the resource utilization rate of the system is improved.

Drawings

Fig. 1 is a schematic structural diagram of a communication system to which a data transmission method according to an embodiment of the present application is applied;

fig. 2 is a schematic diagram of a subframe occupied for transmitting data and sending feedback information in a system supporting 10 HARQ processes;

fig. 3 is a schematic diagram of a subframe occupied for transmitting data and sending feedback information in a system supporting 14HARQ processes;

fig. 4 is a schematic view of an interaction flow between a first communication device and a second communication device according to an embodiment of the present application;

fig. 5 is a schematic diagram of a subframe occupied by transmitting data and sending feedback information in a system supporting 14HARQ processes in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a first communication device according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a second communication device according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a first communication device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a second communication device according to an embodiment of the present application.

Detailed Description

Embodiments of the present application are described below with reference to the accompanying drawings.

The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and are merely descriptive of the various embodiments of the application and how objects of the same nature can be distinguished. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The technical solution of the embodiment of the present application can be applied to various data processing communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and other systems. The term "system" may be used interchangeably with "network". CDMA systems may implement wireless technologies such as Universal Terrestrial Radio Access (UTRA), CDMA2000, and the like. UTRA may include Wideband CDMA (WCDMA) technology and other CDMA variant technologies. CDMA2000 may cover the Interim Standard (IS) 2000(IS-2000), IS-95 and IS-856 standards. TDMA systems may implement wireless technologies such as global system for mobile communications (GSM). The OFDMA system may implement wireless technologies such as evolved universal terrestrial radio access (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash OFDMA, etc. UTRA and E-UTRA are UMTS as well as UMTS evolved versions. Various versions of 3GPP in Long Term Evolution (LTE) and LTE-based evolution are new versions of UMTS using E-UTRA. The fifth Generation (5 Generation, abbreviated as "5G") communication system and the New Radio (NR) are the next Generation communication systems under study. In addition, the communication system can also be applied to future-oriented communication technologies, and all the technical solutions provided by the embodiments of the present application are applied. The system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

Fig. 1 shows a schematic structural diagram of a Radio Access Network (RAN) according to an embodiment of the present application. The RAN may be a base station access system of a 2G network (i.e. the RAN comprises base stations and base station controllers), or may be a base station access system of a 3G network (i.e. the RAN comprises base stations and RNCs), or may be a base station access system of a 4G network (i.e. the RAN comprises enbs and RNCs), or may be a base station access system of a 5G network.

The RAN includes one or more network devices. The network device may be any device with a wireless transceiving function, or a chip disposed in a specific device with a wireless transceiving function. The network devices include, but are not limited to: a base station (e.g. a base station BS, a base station NodeB, an evolved base station eNodeB or eNB, a base station gdnodeb or gNB in a fifth generation 5G communication system, a base station in a future communication system, an access node in a WiFi system, a wireless relay node, a wireless backhaul node), etc. The base station may be: macro base stations, micro base stations, pico base stations, small stations, relay stations, etc. A network, or future evolution network, in which multiple base stations may support one or more of the technologies mentioned above. The core network may support a network of one or more of the above mentioned technologies, or a future evolution network. A base station may include one or more Transmission Receiving Points (TRPs) that are co-sited or non-co-sited. The network device may also be a wireless controller, a Centralized Unit (CU), a Distributed Unit (DU), or the like in a Cloud Radio Access Network (CRAN) scenario. The network device may also be a server, a wearable device, or a vehicle mounted device, etc. The following description will take a network device as an example of a base station. The multiple network devices may be base stations of the same type or different types. The base station may communicate with the terminal devices 1-6, and may also communicate with the terminal devices 1-6 through the relay station. The terminal devices 1-6 may support communication with multiple base stations of different technologies, for example, the terminal devices may support communication with a base station supporting an LTE network, may support communication with a base station supporting a 5G network, and may support dual connectivity with a base station of an LTE network and a base station of a 5G network. Such as a RAN node that accesses the terminal to the wireless network. Currently, some examples of RAN nodes are: a gbb, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), or a wireless fidelity (Wifi) Access Point (AP), etc. In one network configuration, a network device may include a Centralized Unit (CU) node, or a Distributed Unit (DU) node, or a RAN device including a CU node and a DU node.

The terminal devices 1 to 6, also called User Equipment (UE), Mobile Station (MS), Mobile Terminal (MT), terminal, etc., are devices that provide voice and/or data connectivity to the terminal devices, or chips disposed in the devices, such as handheld devices, vehicle-mounted devices, etc., that have wireless connectivity. Currently, some examples of terminal devices are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (smart security), a wireless terminal in city (smart city), a wireless terminal in home (smart home), and the like. The terminal device provided by the embodiment of the application can be a low-complexity terminal device and/or a terminal device in a coverage enhancement A mode.

In the embodiment of the present application, the base station and the UEs 1 to 6 form a communication system, in which the base station transmits one or more of system information, RAR message, and paging message to one or more of the UEs 1 to 6, and the UEs 4 to 6 also form a communication system, in which the UE5 may be implemented as a function of the base station, and the UE5 may transmit one or more of system information, control information, and paging message to one or more of the

UEs

4 and 6.

Please refer to fig. 2, which is a schematic diagram of subframes occupied by transmitting data and sending feedback information in a system supporting 10 HARQ processes, and for the system supporting 10 HARQ processes, there is a problem of insufficient resource utilization. M0 to M9 are 10 MPDCCH subframes for scheduled PDSCH, D0 to D9 are 10 PDSCH subframes scheduled by M0 to M9. The data blocks D0 to D3 are fed back at a0 on a Physical Uplink Control Channel (PUCCH), the data blocks D4 to D7 are fed back at a1, and D8 and D9 are fed back at a 2. Since MPDCCH to PDSCH has a two-subframe interval,

subframes

0 and 1 are not used for transmission of data, thus causing a waste of resources.

To solve the problem of resource waste, please refer to fig. 3, which is a schematic diagram of subframes occupied by transmitting data and sending feedback information in a system supporting 14HARQ processes, 14HARQ processes are introduced into a downlink control channel, and M10 to M13 are scheduling information corresponding to the newly introduced HARQ processes. The data scheduled by M10 and M11 is transmitted at subframe 17 and subframe 18, and the HARQ-ACK information for the data scheduled by M10 and M11 is fed back at subframe 20. At subframe 17 and subframe 18, since HARQ processes for D10 and D11 have not fed back HARQ Acknowledgement (ACK), scheduling cannot be performed, and two HARQ processes need to be introduced. In summary, 14HARQ processes are required to be introduced to fully utilize the resources. Compared with the scenario that 10 HARQ processes are introduced into the downlink control channel, the transmission rate can be improved by 20% in the scenario that the downlink control channel uses 14HARQ processes.

As can be seen from the above description, the scheduling delay between M10 and D10 is 7 subframes, where the scheduling delay refers to a time unit spaced from an MPDCCH subframe of a scheduled PDSCH to a PDSCH subframe, and the time unit may be, for example, a frame, a subframe, or a symbol, or a valid frame, or a valid subframe, or a valid symbol, or an absolute frame, or an absolute subframe, or an absolute symbol, or a bandwidth-reduced low-complexity and coverage enhancement (BL/CE) subframe. And D10, the HARQ-ACK time delay fed back to the subframe 30 is 13 subframes, wherein the HARQ-ACK time delay can also be called feedback time delay, and the HARQ-ACK time delay refers to a time unit of an interval from a PDSCH subframe to a PUCCH subframe for feeding back feedback information of data carried by the PDSCH subframe.

At present, the scheduling delay from the MPDCCH to the PDSCH is fixed to 2 subframes, and cannot be used for the scheduling delay from the MPDCCH to the PDSCH in 14HARQ processes. Similarly, the PDSCH to HARQ-ACK feedback delay is dynamically indicated, but the 14 HARQ-ACK scenario cannot be adapted.

Currently, as shown in table 1 below, the HARQ-ACK delay field may also be employed to indicate the HARQ process index used and the scheduling delay.

TABLE 1

HARQ-ACK delay field in DCI	HARQ ID used	Scheduling delay of PDSCH subframes
0	10	2
1	10	7
10	11	2
11	11	7
100	12	2
101	12	7
110	13	2
111	13	7

As shown in table 2 below, the HARQ acknowledgement latency may also be indicated using bit states 10 to 15 of the HARQ process number (process number) field.

TABLE 2

HARQ-ID field in DCI	HARQ-ACK delay
10	4
11	5
12	7
13	9
14	11
15	13

In the scheme, the HARQ-ACK delay field and the HARQ process number field are both re-decoded, so that the influence on the current communication protocol is large, and the realization complexity of network equipment and terminal equipment is high. Meanwhile, the two fields only indicate the HARQ-ACK delay, the HARQ process index and the scheduling delay, and the flexibility of signaling use is poor.

In order to solve the problem of indication of scheduling delay when 14HARQ processes are introduced into a downlink control channel, an embodiment of the present application provides a data transmission method, which is applicable to a data transmission scenario of HARQ process scheduling, and first please refer to fig. 4, where the method is an interaction flow diagram between a first communication device and a second communication device provided in the embodiment of the present application, for example, the first communication device may be the foregoing terminal device, and the second communication device may be the foregoing network device. In the information processing method provided in the embodiment of the present application, the following steps 401 to 404 are described in detail from the second communication device side, and the following steps 411 to 414 are described from the first communication device side, and the method mainly includes the following steps:

401. the second communication device determines an index of a first HARQ process corresponding to the first data transmission.

In this embodiment of the application, the first data is downlink data that the second communication device needs to send to the first communication device, and the first data may also be referred to as downlink data, or the first data may also be referred to as data to be sent, for example, the first data may be data carried by one or more transport blocks. The first HARQ process corresponding to the first data transmission means that the HARQ process scheduling the first data is the first HARQ process, and the first HARQ process has an index, for example, the index of the first HARQ process may be referred to as the first index. When the second communication device determines that the first data needs to be transmitted to the first communication device, the second communication device first determines an index of a first HARQ process corresponding to the first data transmission, for example, the index of the first HARQ process determined by the second communication device may be an index number or an index identifier.

402. And the second communication equipment sends control information to the first communication equipment, wherein the control information indicates the index of the first HARQ process.

In this embodiment of the present application, after the second communication device determines the index of the first HARQ process, the second communication device may indicate the index of the first HARQ process to the first communication device, for example, the second communication device may establish a communication connection with the first communication device, where the communication connection may be a wired connection or a wireless connection. The second communication device sends control information to the first communication device, where the control information may be carried by physical layer signaling, for example, the control information may be Downlink Control Information (DCI), or the control information may be other signaling capable of communicating with the first communication device, which is not limited herein.

The control information indicates an index of the first HARQ process, for example, a field in the control information may be used to carry the index of the first HARQ process, the field may be a newly added field in the control information, or a reserved field in the control information, or a field in the control information that is reused, and the field originally used for another function may be used to carry the index of the first HARQ process. The manner in which the control information carries the index of the first HARQ process is not limited. It should be noted that other fields may also be included in the control information, which is described in detail in the following embodiments.

In some embodiments of the present application, in addition to the second communication device performing steps 401 to 404, the data transmission method provided in the embodiments of the present application may further include the following steps:

the second communication equipment sends first information to the first communication equipment, wherein the first information is used for indicating that the index of the first HARQ process can or cannot belong to the second set;

under the condition that the first information indicates that the index of the first HARQ process can belong to the second set, when the index of the first HARQ process belongs to the first set, the second communication equipment determines that the transmission of the first data adopts an asynchronous HARQ mode; and when the index of the first HARQ process belongs to the second set, the second communication equipment determines that the transmission of the first data adopts a synchronous HARQ mode.

The first information is used to indicate that the index of the first HARQ process may or may not belong to the second set, where the fact that the index of the first HARQ process may belong to the second set means that the first communication device supports the capability that the index of the first HARQ process belongs to the second set, and the fact that the index of the first HARQ process may not belong to the second set means that the first communication device does not support the capability that the index of the first HARQ process belongs to the second set, that is, the index of the first HARQ process may only belong to the first set at this time. The first information is used to indicate that the index of the first HARQ process may or may not belong to the second set, and may also be expressed as: the first information is for enabling or disabling an index indicating the first HARQ process from the second set. For example, the first information may be used to enable 14HARQ, or to enable additional HARQ, the second device may enable the first device to use more HARQ, or to enable the first device to use more than 10 HARQ.

The transmission of the first data may employ an asynchronous HARQ scheme or a synchronous HARQ scheme, and synchronous (synchronous) HARQ may be understood as that a time interval for retransmitting a previous (or latest) data transmission corresponding to the HARQ process index is fixed or predefined, or the retransmission is transmitted at a fixed time after the previous data transmission. It may also be understood that the time interval between data transmission and HARQ-ACK is fixed or predefined, or that the HARQ-ACK delay is fixed or predefined. Asynchronous HARQ may be understood as the time interval for retransmitting the previous (or most recent) data transmission corresponding to the HARQ process index is arbitrary or configured by the second communication device, i.e. the retransmission may occur at any time according to the scheduling of the second communication device. It may also be understood that the time interval between data transmission and HARQ-ACK is configurable or indicated, or that the HARQ-ACK delay is configurable or indicated. In a case that the first information indicates that the index of the first HARQ process can belong to the second set, which manner the first data is transmitted in may be determined by that the index of the first HARQ process belongs to the second set, or that the index of the first HARQ process belongs to the first set, for example, when the index of the first HARQ process belongs to the first set, the first data is transmitted in an asynchronous HARQ manner, and when the index of the first HARQ process belongs to the second set, the first data is transmitted in a synchronous HARQ manner. The second communication device can indicate the HARQ mode adopted by the first data transmission to the first communication device through the value size of the index of the first HARQ process, so that the indicating efficiency of the HARQ mode is improved.

In some embodiments of the present application, the control information comprises: a first field in which, among other things,

a first field indicating a HARQ acknowledgement delay (HARQ-ACK delay) when an index of the first HARQ process belongs to the first set;

the first field includes transmission information of a set of transmission blocks when the index of the first HARQ process belongs to the second set, or the first field is a reserved field.

When the index of the first HARQ process belongs to the second set, the value of the first delay may be fixed, for example, fixed to 7 or more than 7 time units. The control information includes a first field, where the first field may indicate different information according to a value size of an index of the first HARQ process, for example, when the index of the first HARQ process belongs to the first set, the first field indicates a HARQ acknowledgement delay (HARQ-ACK delay), and the HARQ acknowledgement delay may also be referred to as a HARQ feedback delay, it may be understood that, for a PDSCH in a subframe n-k, the first communication device determines the subframe n as a transmission subframe of HARQ-ACK, where k is referred to as the HARQ-ACK delay. PDSCH of subframe n-k may also be understood as the last subframe of transmission of PDSCH is n-k. The transmission subframe of the HARQ-ACK may be understood as the first subframe to transmit the HARQ-ACK. When the index of the first HARQ process belongs to the first set, the HARQ acknowledgement delay is indicated by the first field, so that when the second communication device sends the control information, the control information carries the first field, the first communication device parses the first field in the control information, thereby obtaining the HARQ acknowledgement delay, and the first communication device may perform uplink feedback according to the HARQ acknowledgement delay.

When the index of the first HARQ process belongs to the second set, the HARQ ack/nack delay may be a predefined delay value, for example, the HARQ ack/nack delay may be 13 time units, where the first field in the control information is not required for transmitting the HARQ ack/nack delay, and the first field may be a reserved field, that is, the bit state of the first field is reserved. Or the first field includes transmission information of a set of transport blocks, which may be (or correspond to) a set of transport blocks scheduled by other HARQ processes in the second set except for the first HARQ process, for example, the index of the second HARQ process is also included in the second set, the second HARQ process may be one or a HARQ process, and then the set of transport blocks included in the first field refers to the transport blocks scheduled by the second HARQ process. Wherein the transmission information refers to whether a transport block in the transport block set is scheduled or whether each transport block in the transport block set is transmitted.

In some embodiments of the present application, the control information may be DCI, and the first field in the control information may be a HARQ-ACK delay field in the DCI.

In some embodiments of the present application, when the index of the first HARQ process belongs to the second set, the first field includes N bits, N being a positive integer;

the N bits of the first field indicate whether each transport block in the transport block set is scheduled by means of a bitmap.

The first field may include N bits, for example, the value of N may be 3 bits, or 4 bits, and the like. The N bits of the first field indicate whether each transport block in the transport block set is scheduled by means of a bitmap, e.g. the first field comprises 3 bits, then the 3 bits may indicate whether 3 transport blocks scheduled by 3 HARQ processes are scheduled, where scheduled may be denoted as transmitted. For example, a bit of the first field is 0 to indicate that the transport block is not scheduled, and a bit of the first field is 1 to indicate that the transport block is scheduled.

In some embodiments of the present application, the control information comprises: a second field and a third field, wherein,

when the high S bits of the third field indicate the first state, the second field indicates the second numerical time unit and the index of the first HARQ process, or indicates the first numerical time unit and the index of the first HARQ process;

and/or the presence of a gas in the gas,

a second state indicated by the low T bits of the third field is used to determine transmission information of the transport block;

wherein S and T are positive integers.

The control information includes a second field and a third field, where the second field may indicate different information according to different bit states of the third field, for example, when high S bits of the third field indicate a first state, the second field indicates a second number of time units and an index of the first HARQ process, or indicates a first number of time units and an index of the first HARQ process, a value of S is not limited, for example, the first state indicated by the S bits may be a specific state, for example, a value of S may be 2, and a value of the first state is 11. The high S bit is S bits sequentially from the high bit to the low bit of the third field, and when the index of the first HARQ process belongs to the second set, the second field indicates the first delay and the index of the first HARQ process, where the first delay may be a first number of time units or a second number of time units. In this embodiment of the application, the second field may indicate the first delay and the index of the first HARQ process at the same time, so that the first communication device determines the first delay and the index of the first HARQ process by analyzing the second field of the control information.

In some embodiments of the present application, the low T bits of the third field indicate a second state, which is used to determine transmission information of a transport block, where the transport block may be a transport block scheduled by another HARQ process in the second set except the first HARQ process, for example, an index of the second HARQ process is also included in the second set, and then the set of transport blocks included in the first field refers to a transport block scheduled by the second HARQ process. The transmission information indicates whether a transport block in the transport block set is scheduled, and/or indicates a New Data Indicator (NDI) corresponding to the transport block when the transport block is scheduled or indicates an NDI of the transport block scheduled by the HARQ process. It is understood that NDI indicates the corresponding TB as a new transmission if it is flipped or changed or toggled or switched (toggled), and a transport block is a retransmission if it is not flipped. Here, the inversion means that the state of one bit changes from 1 to 0 or from 0 to 1. Or the transmission information may be a transport block type, e.g. the transport block type may be new data transmission or retransmitted data.

In some embodiments of the present application, the control information may be DCI, the second field in the control information may be a HARQ-ACK delay field in the DCI, and the third field may be a HARQ process number field in the DCI.

In some embodiments of the present application, the value of T is 2, and the lower 2 bits of the third field are the first bit and the second bit;

the first bit indicates whether the transport block is scheduled, and the second bit indicates whether the transport block is a newly transmitted transport block or a retransmitted transport block.

For example, the lower 2 bits of the third field are used to indicate the scheduling information corresponding to the second HARQ process, and the second HARQ process belongs to the second set. The low-order 2 bits are used for indicating scheduling information corresponding to the second HARQ process, and include 1 bit indicating whether the second HARQ process is scheduled, and 1 bit indicating NDI.

In some embodiments of the present application, the HARQ acknowledgement delay includes: d time units, wherein the value of D is 13,14,15, 17 or 19.

Wherein, the HARQ acknowledgement delay is a first value, for example, the first value is 13,14,15, 17, or 19. At this time, a scenario supporting multiple HARQ can be adapted, when a scenario supporting 14HARQ is supported, the first time delay from MPDCCH to PDSCH is large, for example, 7, which results in that the feedback from PDSCH to HARQ-ACK can only be carried on a PUCCH subframe with a larger time delay, and the value 13 is the first PUCCH subframe that can be used by PDSCH, in order to balance HARQ-ACK information carried by different PUCCHs, therefore, the HARQ acknowledgement response time delay can also have the equivalent of 14,15, and 16, so that HARQ-ACK can be fed back, and loads carried on different PUCCH resources can be relatively balanced.

In some embodiments of the present application, the control information indicates that the HARQ acknowledgement delay is determined from a first set of acknowledgement delays when the first delay is a first number of time units;

when the first time delay is a second numerical time unit, the control information indicates that the HARQ acknowledgement time delay is determined from the second acknowledgement time delay set;

wherein the first set of acknowledgement delays and the second set of acknowledgement delays comprise different HARQ acknowledgement delays.

In this embodiment of the present application, both the first communication device and the second communication device may determine two sets of acknowledgement delays in advance, for example, the two sets of acknowledgement delays may be: a first set of acknowledgement delays and a second set of acknowledgement delays, the first set of acknowledgement delays and the second set of acknowledgement delays comprising different HARQ acknowledgement delays. The difference here is that at least one HARQ acknowledgement delay belongs to one set (e.g. the first set of acknowledgement delays) and the HARQ acknowledgement delay does not belong to the other set (e.g. the second set of acknowledgement delays). When the first time delay is a second number of time units, the index of the first HARQ process belongs to the second set, and the HARQ acknowledgement delay may determine from which acknowledgement delay set to acquire according to the number of time units of the first time delay. In the embodiment of the application, the value range of the HARQ acknowledgement delay can be determined only by determining the number of time units included in the first time delay by the first communication device and the second communication device, so that the complexity of determining the HARQ acknowledgement delay is simplified.

Further, in some embodiments of the present application, the first set of acknowledgement delays comprises at least one of the following values: 4. 5,6,7,8,9, 10,11,13,15, 17;

the second set of acknowledgement delays comprises at least one of the following values: 13. 14,15,16,19, 26;

wherein the numerical value is the number of time units.

In particular, the first set of acknowledgement delays comprises one or more of the following elements, 4,5,6,7,8,9, 10,11,13,15, 17. The second set of acknowledgement delays comprises one or more of the following elements: 13,14,15,16,19,26. As can be seen, the minimum delay included in the second acknowledgement delay set is 13, and the minimum delay included in the first acknowledgement delay set is 4, so that the number of time units included in the first delay can determine from which acknowledgement delay set the HARQ acknowledgement delay should be acquired, thereby simplifying the complexity of determining the HARQ acknowledgement delay. In addition, when the first delay is large, for example, the first delay is a second number of time units, for example, the first delay is 7 time units, so that the PDSCH-to-HARQ-ACK feedback can only be carried on a PUCCH subframe with a larger delay, and the value 13 is the first PUCCH subframe that can be used by the PDSCH, in order to balance HARQ-ACK information carried by different PUCCHs, the values of 14,15, and 16 can also be taken, so that not only HARQ-ACK can be fed back, but also loads carried by different PUCCH resources are relatively balanced. And when the first delay is small, for example, the first delay is a first number of time units, for example, the first delay is 2 time units, the HARQ-ACK feedback delay is also small, and can be configured more flexibly. Therefore, the minimum value of the second acknowledgement delay set is greater than the minimum value of the first acknowledgement delay set, and the two delays are designed to better adapt to different scheduling delays, so that the flexibility of feedback delay indication under different scheduling delays is improved.

In some embodiments of the present application, the control information comprises: a fourth field in which, if any,

when the index of the first HARQ process belongs to the first set, the fourth field indicates the HARQ acknowledgement time delay;

the fourth field indicates a second number of time units and a HARQ acknowledgement delay, or indicates a first number of time units and a HARQ acknowledgement delay, when the index of the first HARQ process belongs to the second set.

The control information includes a fourth field, where the fourth field may indicate different information according to a value size of an index of the first HARQ process, for example, when the index of the first HARQ process belongs to the first set, the fourth field indicates a HARQ acknowledgement delay (HARQ-ACK delay), and the HARQ acknowledgement delay may also be referred to as a HARQ feedback delay, and when the index of the first HARQ process belongs to the first set, the HARQ acknowledgement delay is indicated by the fourth field, so when the second communication device sends the control information, the control information carries the fourth field, and the first communication device analyzes the fourth field in the control information, so as to obtain the HARQ acknowledgement delay, and the first communication device may perform uplink feedback according to the HARQ acknowledgement delay. When the index of the first HARQ process belongs to the second set, the HARQ acknowledgement delay may be one delay value, for example, the HARQ acknowledgement delay may be 13 time units, and a fourth field in the control information is used to transmit the HARQ acknowledgement delay. In this application embodiment, the fourth field may indicate the first delay and the HARQ acknowledgement delay at the same time, so that the first communication device determines the first delay and the HARQ acknowledgement delay by analyzing the fourth field of the control information.

In some embodiments of the present application, when the index of the first HARQ process belongs to the second set, the fourth field includes Q bits, Q being a positive integer;

q bits of the fourth field indicate a first delay in the first set of delays and indicate a HARQ acknowledgement delay in the third set of acknowledgement delays;

wherein the first set of time delays comprises at least one of the following values: 2. p is a positive integer greater than or equal to 7;

the third set of acknowledgement delays comprises at least one of the following values: 4. 5, 7, 13;

wherein the numerical value is the number of time units.

Optionally, the first HARQ process index is indicated by a HARQ process number field.

Specifically, the fourth field includes Q bits, where the Q bits indicate a first delay in a first delay set, and the first delay set includes at least one of the following values: 2. p, which is a positive integer greater than or equal to 7, may be predefined or higher-level configured. The first delay may therefore be 2 time units, or the first delay may be 7 time units, or the first delay may be a time unit greater than 7. When 14HARQ processes are introduced, the first delay is minimum 7 subframes, and when ACK feedback occupies more time, in order to accurately and flexibly schedule a transport block, the first delay greater than or equal to 7 needs to be introduced.

In this embodiment of the present application, the Q bits further indicate HARQ acknowledgement delays in a third set of acknowledgement delays, where the third set of acknowledgement delays includes at least one of the following values: 4. 5, 7, and 13, therefore, the value of the HARQ acknowledgement delay may be 4 time units, or 5 time units, or 7 time units, or 13 time units. When the first delay is large, for example, the first delay is a second number of time units, for example, the first delay is 7 time units, the PDSCH-to-HARQ-ACK feedback can only be carried on a PUCCH subframe with a larger delay, and the value 13 is the first PUCCH subframe that can be used by the PDSCH. And when the first delay is small, for example, the first delay is a first number of time units, for example, the first delay is 2 time units, the HARQ-ACK feedback delay is also small, for example, may be 4, and may be configured more flexibly. Therefore, the HARQ acknowledgement time delays with different sizes are selected from the third acknowledgement time delay set, different scheduling time delays can be better adapted, and the flexibility of feedback time delay indication under different scheduling time delays is improved.

In some embodiments of the present application, the control information may be DCI, and the fourth field in the control information may be a HARQ-ACK delay field in the DCI.

In some embodiments of the present application, methods provided by embodiments of the present application further include:

the second communication equipment acquires the HARQ acknowledgement time delay;

the second communication device determines to enable HARQ feedback binding (bundling) according to the fact that the HARQ acknowledgement delay belongs to a fourth acknowledgement delay set, or determines not to enable HARQ feedback binding according to the fact that the HARQ acknowledgement delay belongs to a fifth acknowledgement delay set;

the second communication equipment sends feedback binding indication information to the first communication equipment, and the feedback binding indication information is used for the first communication equipment to determine whether HARQ feedback binding is enabled.

the first communication equipment receives feedback binding indication information sent by the second communication equipment;

the first communication equipment determines whether HARQ feedback binding is enabled according to the feedback binding indication information;

when HARQ feedback binding is enabled, the HARQ acknowledgement delay belongs to a fourth acknowledgement delay set;

when HARQ feedback binding is not enabled, the HARQ acknowledgement delay belongs to a fifth acknowledgement delay set;

wherein the fourth acknowledgement delay set and the fifth acknowledgement delay set each include different delay values.

The feedback binding indication information may be sent through a higher layer signaling or through a physical layer signaling. For example, when the HARQ-ACK bundling is not enabled by the high layer signaling and the first HARQ process belongs to the second set, the HARQ acknowledgement delay belongs to the fourth acknowledgement delay set; and when the high-level signaling enables the HARQ-ACK bundling and the first HARQ process belongs to the second set, the HARQ acknowledgement delay belongs to a fifth acknowledgement delay set, a fourth acknowledgement delay set and a fifth acknowledgement delay set.

In some embodiments of the present application, the fifth set of acknowledgement delays comprises only the following values: 13.

illustratively, the fifth set of acknowledgement delays comprises only 13. When the first delay is large, for example, the first delay is a second number of time units, for example, the first delay is 7 time units, the PDSCH-to-HARQ-ACK feedback can only be carried on a PUCCH subframe with a larger delay, and the value 13 is the first PUCCH subframe that can be used by the PDSCH, so that the fifth acknowledgement delay set only includes 13, and the minimum feedback delay can be implemented. Whether the HARQ bundling is adopted or not can affect the acknowledgement delay of the HARQ-ACK, so that two different sets are determined according to whether the bundling is enabled or not, the bundling time delay is small, the maximum delay value can be large when the bundling is not enabled, and the accuracy of feedback delay and the flexibility of indication are improved.

In some embodiments of the present application, initialization of the scrambling sequence of the first signal is determined based on one or more parameters including a cell Identification (ID), a starting subframe or symbol or slot of a paging opportunity, a first index. The first index is used for indicating the number or index of the first signal resource configured for the first communication device by the second communication device. Illustratively, the first signal is a Wake up signal (Wake up signal), and the first signal resource is a resource that transmits the first signal. For example, the second communication device configures 4 resources, which are numbered 0,1,2, and 3, where this number is a resource number or an index, and the second communication device configures 2 first signal resources for the first communication device, which are resources with

indexes

1 and 3, respectively, so that the first index corresponding to the resource with index 1 is 0, and the first index corresponding to the resource with index 3 is 1. In the scheme, the first terminal device can determine the initialization sequence according to the number of resources actually allocated to the first terminal device by the base station, so that the calculation complexity is reduced, and the implementation complexity of the first terminal device is simplified.

411. The first communication device receives control information sent by the second communication device, wherein the control information indicates an index of a first HARQ process corresponding to the first data transmission.

In the embodiment of the present application, the second communication device may establish a communication connection with the first communication device, and the communication connection may be a wired connection or a wireless connection. The second communication device sends control information to the first communication device, where the control information may be carried by physical layer signaling, for example, the control information may be DCI, or the control information may be other signaling capable of communicating with the first communication device, which is not limited herein. The first communication device may receive the control information sent by the second communication device through the communication connection, and the first communication device may further parse the control information.

412. The first communication equipment determines the index of the first HARQ process according to the control information;

in this embodiment of the application, after the first communication device receives the control information, the first communication device may further analyze the control information to obtain an index of a first HARQ process corresponding to the first data transmission indicated by the control information. For example, the index of the first HARQ process determined by the first communication device may be an index number or an index identifier.

403. And the second communication equipment determines a starting time unit used for first data transmission according to the ending time unit and the first time delay of the control information, wherein when the index of the first HARQ process belongs to a first set, the second communication equipment determines that the first time delay is a first value time unit, when the index of the first HARQ process belongs to a second set, the second communication equipment determines that the first time delay is the first value time unit or a second value time unit, the first value is not equal to the second value, and the first set and the second set comprise indexes of different HARQ processes.

In the embodiment of the present application, there is no difference in the sequence between step 403 and step 402. The second communication device first determines an end time unit of the control information, where the end time unit refers to a last time unit of transmitting the control information, for example, the end time unit may be a last subframe of transmitting the control information, and the end time unit may be an nth subframe, where the nth subframe refers to a last subframe of transmitting the control information.

In this embodiment, the first time delay is a time unit of an interval between an end time unit of the control information and a start time unit used for transmitting the first data, that is, from the end time unit of the control information, the first time delay needs to be separated to start transmitting the first data. The first delay in the embodiments of the present application may have various implementations, for example, the first delay may be indicated to the first communication device by the second communication device, or the first delay may be predefined. In addition, in this embodiment of the application, a time length (referred to as a duration for short) of the first delay may be determined by an index of the first HARQ process indicated by the control information, for example, the duration of the first delay is determined according to a value size of the index of the first HARQ process.

In this embodiment of the present application, a first set and a second set are allocated in advance in a first communication device and a second communication device, where the first set includes one or more indexes of HARQ processes, and similarly, the second set includes one or more indexes of HARQ processes, and the first set and the second set include indexes of different HARQ processes, that is, HARQ processes included in the first set and the second set respectively have different indexes. Further, the index of the HARQ process included in the second set is greater than the index of the HARQ process included in the first set, that is, the index of any HARQ process included in the second set is greater than the index of any HARQ process included in the first set.

In the embodiment of the present application, when the index of the first HARQ process belongs to the second set, the first HARQ process may also be referred to as an additional HARQ process or a 14HARQ process.

In some embodiments of the present application, the first set is {0,1,2,3,4,5,6,7,8,9} and the second set is {10,11,12,13 }. In the scheme, the indexes of the HARQ processes included in the first set and the indexes of the HARQ processes included in the second set are consecutive, so that the first set and the second set have 14 indexes of the HARQ processes in total. The index of the first HARQ process indicated by the control information may belong to the first set or belong to the second set, and the index of the first HARQ process is determined specifically according to an application scenario.

In other embodiments of the present application, the first set is {0,1,2,3,4,5,6,7,8,9} and the second set is {12,13,14,15 }. In the scheme, the indexes of the HARQ processes in the first set and the indexes of the HARQ processes in the second set are discontinuous, and the first set and the second set are added to have 14 indexes of the HARQ processes in total. The index of the first HARQ process indicated by the control information may belong to the first set or belong to the second set, and the index of the first HARQ process is determined specifically according to an application scenario.

In this embodiment, the second communication device may determine the number of time units included in the first time delay according to a value size of an index of the first HARQ process, where the time unit may be a frame, a subframe, or a symbol, or an effective frame, or an effective subframe, or an effective symbol, or an absolute frame, or an absolute subframe, or an absolute symbol, or a BL/CE subframe. In this embodiment of the application, according to whether the index of the first HARQ process belongs to the first set or the second set, the duration of the first delay is determined as two time units with different lengths, for example, the duration of one time unit is fixed, the first delay may be a first number of time units or a second number of time units, where the first number is not equal to the second number, for example, the second number is greater than the first number, and the specific values of the first number and the second number may be determined according to a specific scenario.

In some embodiments of the present application, the first number is 2, the second number is 7, that is, the first time delay may include 2 time units, or the first time delay may include 7 time units, so that a specific value of the first time delay may be determined according to whether an index of the first HARQ process belongs to the first set or belongs to the second set, and the specific value of the first time delay is a time delay that can be determined by the first communication device and the second communication device, so that the first terminal device can correctly receive the first data, the complexity of a receiving algorithm of the first communication device is reduced, the complexity of a sending algorithm of the second communication device is also reduced, the flexibility of indication is improved, the signaling overhead is reduced, and the resource utilization rate of the system is improved at the same time. Without limitation, in some embodiments of the present application, the value of the second value may also be not limited to 7, for example, the value of the second value is P, and P is a positive integer greater than or equal to 7. As can be seen from fig. 3, the first delay may be 2 subframes, for example, the scheduling delay between M0 and D0 is 7 subframes, or the first delay may be 7 subframes, for example, the scheduling delay between M10 and D10 is 7 subframes.

In some embodiments of the present application, a duration of the first delay is determined by a size of an index of the first HARQ process, for example, when the index of the first HARQ process belongs to a first set, the second communication device determines that the first delay is a first number of time units, and when the index of the first HARQ process belongs to a second set, the second communication device determines that the first delay is the first number of time units, or a second number of time units. When the index of the first HARQ process belongs to the first set, the second communication device may determine that the first delay is a first number of time units, that is, the first delay may only be the first number of time units, and at this time, the first delay may not be a second number of time units, for example, the first delay may be indicated to the second communication device by the second communication device. When the index of the first HARQ process belongs to the second set, the second communication device determines that the first delay is a first number of time units, or a second number of time units, that is, the first delay may be the first number of time units, or may be the second number of time units, for example, the first delay may be predefined, or indicated to the first communication device by the second communication device.

In this embodiment, the first numerical value and the second numerical value refer to two unequal numerical values, for example, the first numerical value may be a, the second numerical value may be B, and then a and B are not equal.

It should be noted that, when the index of the first HARQ process belongs to the second set, the second communication device can determine that the first delay is the second number of time units, but the second communication device can also determine that the first delay is the first number of time units. When the index of the first HARQ process belongs to the first set, the second communication device is not able to determine that the first delay is the second number of time units, i.e. the second communication device is only able to determine that the first delay is the first number of time units.

In this embodiment of the present application, after determining the first time delay and the end time unit of the control information, the second communication device determines, according to the end time unit of the control information and the first time delay, a start time unit used for the first data transmission, for example, a time unit obtained after the second communication device performs time delay according to the first time delay from the end time unit of the control information is used as the start time unit used for the first data transmission, where the start time unit is a time unit for starting transmission of the first data, and for example, the start time unit may include: a starting frame, a starting subframe, a starting symbol, a starting valid frame, a starting valid subframe, a starting valid symbol, a starting absolute frame, a starting absolute subframe, a starting absolute symbol, etc. In this embodiment of the present application, a duration of the first delay is determined by a value size of an index of the first HARQ process, and when the index of the first HARQ process belongs to the first set or the second set, the first delay has different value manners, so for different values of the first delay, the determined start time unit used for the first data transmission is also different, for example, the first delay is a first number of time units, the first start time unit used for the first data transmission may be determined, the first delay is a second number of time units, and the second start time unit used for the first data transmission may be determined.

For example, when the index of the first HARQ process belongs to the first set, the second communications device sends the first data scheduled by the first HARQ process according to the first time unit set, where the number of the first time unit set is n + x1, n is the number of the last time unit of the transmission control information, and x1 is the first number of time units; and when the index of the first HARQ process belongs to the second set, the second communication device sends the first data scheduled by the first HARQ process according to the second time unit set, wherein the number of the first time unit in the second time unit set is n + x2, n is the number of the last time unit for transmitting the control information, and x2 is the first numerical time unit or the second numerical time unit.

404. And the second communication equipment transmits the first data according to the determined starting time unit.

In this embodiment of the application, the second communication device determines, through step 403, a starting time unit used for transmitting the first data, and the second communication device may send the first data according to the starting time unit, that is, when the starting time unit arrives, the second communication device may send the first data scheduled by the first HARQ process. In this embodiment of the application, the first communication device may also determine the starting time unit used for the first data transmission according to the foregoing step 403, so that when the starting time unit arrives, the first communication device may receive the first data scheduled by the first HARQ process, and thus the first communication device may implement data transmission with the second communication device.

413. The first communication device determines a starting time unit used for first data transmission according to an ending time unit and a first time delay of the control information, wherein when an index of the first HARQ process belongs to a first set, the first communication device determines that the first time delay is a first value of time unit, when the index of the first HARQ process belongs to a second set, the first communication device determines that the first time delay is the first value of time unit or a second value of time unit, the first value is not equal to the second value, and the first set and the second set comprise indexes of different HARQ processes.

In this embodiment, after the first communication device determines the index of the first HARQ process indicated by the second communication device in step 412, the first communication device first determines an end time unit of the control information, where the end time unit refers to the last time unit for transmitting the control information, for example, the end time unit may be the last subframe for transmitting the control information, and the end time unit may be an nth subframe, where the nth subframe refers to the last subframe for transmitting the control information.

In some embodiments of the present application, the first value is 2, the second value is 7, that is, the first delay may include 2 time units, or the first delay may include 7 time units, so that a specific value of the first delay may be determined according to whether an index of the first HARQ process belongs to the first set or the second set, where the specific value of the first delay is a delay that can be determined by the first communication device and the second communication device, so that the first communication device can correctly receive the first data, the complexity of a receiving algorithm of the first communication device is reduced, the complexity of a sending algorithm of the second communication device is also reduced, the flexibility of indication is improved, the signaling overhead is reduced, and the resource utilization rate of the system is improved at the same time. Without limitation, in some embodiments of the present application, the value of the second value may also be not limited to 7, for example, the value of the second value is P, and P is a positive integer greater than or equal to 7. As can be seen from fig. 3, the first delay may be 2 subframes, for example, the scheduling delay between M0 and D0 is 7 subframes, or the first delay may be 7 subframes, for example, the scheduling delay between M10 and D10 is 7 subframes.

In some embodiments of the present application, a duration of the first delay is determined by a size of an index of the first HARQ process, for example, when the index of the first HARQ process belongs to a first set, the first communication device determines that the first delay is a first number of time units, and when the index of the first HARQ process belongs to a second set, the first communication device determines that the first delay is the first number of time units, or a second number of time units. When the index of the first HARQ process belongs to the first set, the first communication device may determine that the first delay is a first number of time units, that is, the first delay may only be the first number of time units, and at this time, the first delay may not be a second number of time units, for example, the first delay may be indicated to the first communication device by the second communication device. When the index of the first HARQ process belongs to the second set, the first communication device determines that the first delay is a first number of time units, or a second number of time units, that is, the first delay may be the first number of time units, or the second number of time units, for example, the first delay may be predefined, or indicated to the first communication device by the second communication device.

It should be noted that, when the index of the first HARQ process belongs to the second set, the first communication device can determine that the first delay is the second number of time units, but the first communication device can also determine that the first delay is the first number of time units. When the index of the first HARQ process belongs to the first set, the first communication device is not able to determine that the first latency is the second number of time units, i.e. the first communication device is only able to determine that the first latency is the first number of time units.

In this embodiment of the present application, after the first communication device determines the first time delay and the end time unit of the control information, the first communication device determines a start time unit used for the first data transmission according to the end time unit of the control information and the first time delay, for example, the first communication device starts from the end time unit of the control information, a time unit obtained after performing the time delay according to the first time delay is used as the start time unit used for the first data transmission, and the start time unit is a time unit for starting transmission of the first data, for example, the start time unit may include: a starting frame, a starting subframe, a starting symbol, a starting valid frame, a starting valid subframe, a starting valid symbol, a starting absolute frame, a starting absolute subframe, a starting absolute symbol, etc. In this embodiment of the present application, a duration of the first delay is determined by a value size of an index of the first HARQ process, and when the index of the first HARQ process belongs to the first set or the second set, the first delay has different value manners, so for different values of the first delay, the determined start time unit used for the first data transmission is also different, for example, the first delay is a first number of time units, the first start time unit used for the first data transmission may be determined, the first delay is a second number of time units, and the second start time unit used for the first data transmission may be determined.

414. The first communication device receives first data according to the determined start time unit.

In this embodiment of the application, the first communication device determines, through step 413, a starting time unit used for the first data transmission, and the first communication device may receive the first data according to the starting time unit, that is, when the starting time unit arrives, the first communication device may receive the first data scheduled by the first HARQ process. In this embodiment of the application, the second communication device may also determine the starting time unit used for the first data transmission according to the foregoing step 403, so that when the starting time unit arrives, the first communication device may receive the first data sent by the second communication device, and thus the first communication device may implement data transmission with the second communication device.

In some embodiments of the present application, in addition to the first communication device performing step 411 to step 414, the data transmission method provided in the embodiments of the present application may further include the following steps:

the first communication equipment receives first information sent by the second communication equipment, wherein the first information is used for indicating that the index of the first HARQ process can or cannot belong to the second set;

the first information is used to indicate that the index of the first HARQ process may or may not belong to the second set, where the fact that the index of the first HARQ process may belong to the second set means that the index of the first HARQ process has the capability of belonging to the second set, and the fact that the index of the first HARQ process may not belong to the second set means that the index of the first HARQ process does not have the capability of belonging to the second set, that is, the index of the first HARQ process may only belong to the first set at this time. The first information is used to indicate that the index of the first HARQ process may or may not belong to the second set, and may also be expressed as: the first information is for enabling or disabling an index indicating the first HARQ process from the second set.

The first data may be transmitted in an asynchronous HARQ manner or a synchronous HARQ manner, where, when the first information indicates that the index of the first HARQ process can belong to the second set, which manner the first data is transmitted in may be determined by that the index of the first HARQ process belongs to the second set, or that the index of the first HARQ process belongs to the first set, for example, when the index of the first HARQ process belongs to the first set, the first data is transmitted in the asynchronous HARQ manner, and when the index of the first HARQ process belongs to the second set, the first data is transmitted in the synchronous HARQ manner. The second communication device can indicate the HARQ mode adopted by the first data transmission to the first communication device through the value size of the index of the first HARQ process, so that the indicating efficiency of the HARQ mode is improved.

As can be seen from the foregoing description of the embodiment, both the first communication device and the second communication device may determine the starting time unit used for the first data transmission according to the ending time unit and the first time delay of the control information, where the first communication device determines that the first time delay is a first number of time units when the index of the first HARQ process belongs to the first set, and determines that the first time delay is the first number of time units or a second number of time units when the index of the first HARQ process belongs to the second set, where the first number is not equal to the second number, and the first set and the second set include indexes of different HARQ processes. Therefore, the specific value of the first delay can be determined according to whether the index of the first HARQ process belongs to the first set or the second set, and the specific value of the first delay is the delay that can be determined by the first communication device and the second communication device, so that the first communication device can correctly receive the first data, the complexity of a receiving algorithm of the first communication device is reduced, the complexity of a sending algorithm of the second communication device is also reduced, the indication flexibility is improved, the signaling overhead is reduced, and the resource utilization rate of the system is improved.

In order to better understand and implement the above-described scheme of the embodiments of the present application, the following description specifically illustrates a corresponding application scenario.

In the embodiment of the present application, the first communication device may be a network device, and the second communication device may be a terminal device. Alternatively, the second communication device may be a network device, and the first communication device may be a terminal device. Alternatively, the first communication device may be a device having a transmitting capability and the second communication device may be a device having a receiving capability. In the following embodiments, a first communication device is taken as a network device, and a second communication device is taken as a terminal device for example, and the problems of indication and determination of scheduling delay and HARQ-ACK delay in 14HARQ process scenarios are solved in the embodiments of the present application under the condition of minimizing protocol impact and minimizing implementation complexity of the terminal device and the base station. In the embodiment of the present application, the interaction process between the network device and the terminal device mainly includes the following steps:

step one, a base station determines control information and first information.

Wherein the first information indicates that the first communication device (terminal device) enables or disables the additional HARQ process. This additional HARQ process may also be referred to as an X HARQ process, where X is a positive integer greater than 10, e.g., X ═ 14. That is, the first information is used to enable or disable 14HARQ processes, and when the first information enables 14HARQ processes, the terminal device may configure up to 14HARQ processes, otherwise, the terminal device may not configure 14HARQ processes. Enabling and disabling may also be understood herein as being configured or not configured.

The control information includes a field 1 and a field 2, wherein the field 1 is a HARQ-ACK delay field, and the field 2 is a HARQ process number field.

And step two, the base station sends the control information and the first information to the terminal equipment.

And step three, the terminal equipment receives the control information and the first information sent by the base station.

For example, the control information may be downlink control information, and specifically, the terminal device first determines whether to support an additional HARQ process according to the first information.

When the terminal device supports an additional HARQ process, and a first HARQ process index indicated by the downlink control information is a first set, the scheduling delay is a first type of delay, which can also be understood as that the terminal device decodes (or receives) a corresponding PDSCH in a first subframe set, where a first subframe number of the first subframe set is n + x 1; when the first HARQ process indicated by the downlink control information is a second set, the scheduling delay is a second type delay, which may also be understood as that the terminal device decodes (or receives) the corresponding PDSCH in a second subframe set, where a first subframe of the second subframe set is numbered n + x2, and subframe n is a last subframe for receiving MPDCCH.

Specifically, the first set is {0,1,2,3,4,5,6,7,8,9}, and the second set is {10,11,12,13 }. The first type of delay is a first type of delay here, the first type of delay is 2 valid subframes, that is, x1 is a second valid subframe after subframe n, the first type of delay is a second type of delay here, and the second type of delay is 7 valid subframes, that is, x2 is a 7 th valid subframe or absolute subframe after subframe n. That is, when the scheduled HARQ process index is less than or equal to 9, the scheduling delay is 2 subframes, and when the scheduled HARQ process index is greater than 9, the scheduling delay is 7 subframes.

As shown in table 3 below, it is a table of correspondence between HARQ processes and scheduling delays:

first HARQ process	Scheduling delay
0 to 9 (first set)	2 valid subframes
10 to 13 (second set)	7 valid subframes

Fig. 5 is a schematic diagram of a subframe occupied by transmitting data and sending feedback information in a system supporting 14HARQ processes in this embodiment, where when an index of a first HARQ process belongs to a second set, a first delay is 7 subframes, when a first HARQ process index indicated by downlink control information is the second set, a HARQ-ACK delay is 13, the HARQ-ACK delay and a HARQ acknowledgement delay indicate the same meaning, and when the first HARQ process index indicated by the downlink control information is the first set, the HARQ-ACK delay is configured through a field 1. That is, when the HARQ process index is included in the second set, the HARQ-ACK delay is fixed 13, i.e., the HARQ-ACK feedback is synchronous at this time.

Optionally, when the index of the first HARQ process indicated by the downlink control information is included in the second set, the field 1 is used to indicate a scheduling condition of other HARQ processes (e.g., the second HARQ process, the third HARQ process, and the fourth HARQ process) in the second set, specifically, the field 1 includes 3 bits, and the 3 bits indicate whether TBs corresponding to other HARQ processes in the second set are scheduled according to a bit map. As shown in table 4 below, the second HARQ process, the third HARQ process and the fourth HARQ process belong to a second set.

Table 4 is a table of the indication contents corresponding to different bit states of field 1:

field 1	Indicating the content
A first bit	Whether TB corresponding to the second HARQ process is scheduled or not
Second bit	Whether the TB corresponding to the third HARQ process is scheduled or not
Third bit	Whether the TB corresponding to the fourth HARQ process is scheduled or not

For example, when the high S bit of field 2(HARQ process number) in the downlink control information is in the first state, field 1 in the downlink control information is used to indicate the HARQ ID and the scheduling delay, which is specifically shown in table 5 below:

table 5 is a table of HARQ ID and scheduling delay indicated by field 1 in the downlink control information:

at this time, the low T bits of the field 2 are used to indicate the scheduling information corresponding to the second HARQ process, and the second HARQ process belongs to the second set. Specifically, when the first state is 11, i.e., when the high 2 bit is 11, the field 1 is used to indicate the HARQ ID and the scheduling delay. T ═ 2, that is, the lower 2 bits are used to indicate the scheduling information corresponding to the second HARQ process, and include 1 bit to indicate whether the second HARQ process is scheduled, and 1 bit to indicate NDI.

Optionally, when the scheduling delay is 7, the HARQ-ACK delay is a first value, for example, the first value is 13,14,15, 17, or 19. Namely, the HARQ-ACK feedback time is fixed at this time and is synchronous HARQ.

Optionally, when the scheduled delay is the first type of delay (2 subframes), and the scheduled HARQ process belongs to the second set, the HARQ-ACK delay belongs to the third set, and when the scheduled delay is the second type of delay (7 subframes), the HARQ-ACK delay belongs to the fourth set. The third set and the fourth set are different, and the difference of the two sets means that at least one element belongs to the fourth set, but the element does not belong to the third set. An optional third set comprises one or more of the following elements, e.g. 4,5,6,7,8,9, 10,11,13,15, 17. The fourth set includes one or more of the following elements, e.g., 13,14,15,16,19, 26. Optionally, the HARQ-ACK latency is indicated using the first state set of field 2. Illustratively, as shown in table 6 below:

table 6 is a HARQ-ACK delay value table indicated by the HARQ process number:

optionally, when the HARQ-ACK bundling is not enabled by the high-level signaling, and the scheduled first HARQ process belongs to the second set, the HARQ ACK delay belongs to the fifth set; and when the HARQ-ACK bundling is enabled by the high-layer signaling and the scheduled first HARQ process belongs to the second set, the HARQ ACK delay belongs to the sixth set, and the fifth set is different from the sixth set. Illustratively, the sixth set includes only 13.

Optionally, when the first information sent by the second communications device enables the additional HARQ process (may also be that 14HARQ processes are enabled or the first HARQ process index is indicated in the second set), and when the coverage-enhanced scheduling enhancement (ce-scheduling enhancement) is set to range (range)2 or coverage-enhanced HARQ acknowledgement bundling (ce-HARQ-ACK bundling) is set, the HARQ ACK delay is indicated by field 1(HARQ-ACK delay), and the first state of the HARQ-ACK delay indicates a first value, for example, the first value is 13, and the first state is 101. It can be understood that, when the first information sent by the second communication device enables an additional HARQ process, and when a coverage-enhanced scheduling enhancement (ce-scheduling enhancement) is configured to be set to range (2) or coverage-enhanced HARQ acknowledgement binding (ce-HARQ-ACK bundling) is set, a value of the HARQ-ACK delay at least includes 13, and at this time, the HARQ-ACK delay may be more adapted to the HARQ-ACK delay requirement when the 14HARQ process is enabled, so as to improve the feedback accuracy.

When the first information transmitted by the base station does not enable the additional HARQ process, when the configuration ce-scheduling enhancement is set to range2 or ce-HARQ-AckBundling is set, the first state of field 1 indicates a second value, for example, the second value is 9. As shown in table 7 below, the values of HARQ-ACK delay are illustrated.

Table 7 is a value table of HARQ-ACK delay:

illustratively, field 2(HARQ process number) indicates an index of the first HARQ process, and field 1(HARQ-ACK delay field) is used to indicate a scheduling delay and a HARQ-ACK feedback delay when the scheduled first HARQ process index belongs to the second set {10,11,12,13 }. Such as shown in table 8 below.

Table 8 is a HARQ-ACK delay value table indicated by the HARQ process number:

HARQ in DCI-ACK time delay field	HARQ-ACK delay evaluation	Scheduled PDSCH
0	4	2
1	5	2
10	7	2
11	9	2
100	4	7
101	5	7
110	7	7
111	9	7

And step four, the terminal equipment determines the control information and receives the PDSCH according to the first information.

The control information and the first information determined by the terminal device are described in detail in the foregoing step three, and are not described again here.

As can be seen from the foregoing illustration, in the embodiment of the present application, when the base station enables an additional HARQ process, the scheduling delay and the feedback delay of the HARQ process are fixed, so that the terminal device can correctly receive and feed back the HARQ-ACK, the complexity of the receiving algorithm of the terminal device and the base station is reduced, the TB scheduling condition in the second HARQ process is indicated by using the remaining state, the indication flexibility is improved, the signaling overhead is reduced, and the resource utilization rate of the system is improved at the same time. When the feedback time delay of the HARQ process is configurable, when the indicated scheduling time delay is 2, the value of the HARQ-ACK time delay is small, and when the indicated scheduling time delay is 7, the value of the HARQ-ACK time delay is large, so that the method can be adapted to TBs with different scheduling time delays, and can indicate the HARQ-ACK feedback time information more flexibly and accurately.

Optionally, the embodiments of the present application may also be applied to 5G or other communication systems. For example, the embodiment of the present application may also be used in compatibility of other communication systems with other systems, such as compatibility of NR with enhanced machine type communication (eMTC), compatibility of a machine type communication Further enhanced (fuser eMTC, fertc) system, and the like.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.

To facilitate better implementation of the above-described aspects of the embodiments of the present application, the following also provides relevant means for implementing the above-described aspects.

Referring to fig. 6, which is a schematic view of a structure of a first communication device in an embodiment of the present application, the first communication device 1000 includes: a processing module 1001 and a transceiver module 1002, wherein,

the receiving and sending module is configured to receive control information sent by a second communication device, where the control information indicates an index of a first hybrid automatic repeat request HARQ process corresponding to a first data transmission;

the processing module is configured to determine an index of the first HARQ process according to the control information;

the processing module is configured to determine a starting time unit used for the first data transmission according to an ending time unit and a first time delay of the control information, where the first communication device determines that the first time delay is a first number of time units when the index of the first HARQ process belongs to a first set, and determines that the first time delay is the first number of time units or a second number of time units when the index of the first HARQ process belongs to a second set, where the first number is not equal to the second number, and the first set and the second set include indexes of different HARQ processes;

the transceiver module is configured to receive the first data according to the determined start time unit.

In some embodiments of the present application, the transceiver module is configured to receive first information sent by the second communications device, where the first information is used to indicate that an index of the first HARQ process may or may not belong to the second set;

the processing module is configured to determine that the transmission of the first data adopts an asynchronous HARQ scheme when the index of the first HARQ process belongs to the first set under the condition that the first information indicates that the index of the first HARQ process can belong to the second set; and when the index of the first HARQ process belongs to a second set, determining that the transmission of the first data adopts a synchronous HARQ mode.

Referring to fig. 7, which is a schematic view of a structure of a second communication device in an embodiment of the present application, the second communication device 1100 includes: a processing module 1101 and a transceiver module 1102, wherein,

the processing module is configured to determine an index of a first hybrid automatic repeat request HARQ process corresponding to a first data transmission;

the transceiver module is configured to send control information to a first communication device, where the control information indicates an index of the first HARQ process;

the processing module is configured to determine a starting time unit used for the first data transmission according to an ending time unit and a first time delay of the control information, where the second communication device determines that the first time delay is a first number of time units when the index of the first HARQ process belongs to a first set, and determines that the first time delay is the first number of time units or a second number of time units when the index of the first HARQ process belongs to a second set, where the first number is not equal to the second number, and the first set and the second set include indexes of different HARQ processes;

and the transceiver module is used for transmitting the first data according to the determined starting time unit.

In some embodiments of the present application, the transceiver module is configured to transmit, to the first communication device, first information indicating that an index of the first HARQ process may or may not belong to the second set;

the processing module is configured to, when the first information indicates that the index of the first HARQ process can belong to the second set, transmit the first data in an asynchronous HARQ manner when the index of the first HARQ process belongs to the first set; and when the index of the first HARQ process belongs to a second set, the transmission of the first data adopts a synchronous HARQ mode.

when the index of the first HARQ process belongs to the first set, the first field indicates HARQ acknowledgement delay;

the first field includes transmission information of a set of transmission blocks, or the first field is a reserved field, when the index of the first HARQ process belongs to the second set.

In some embodiments of the present application, when the index of the first HARQ process belongs to the second set, the first field comprises N bits, the N being a positive integer;

when the high S bits of the third field indicate a first state, the second field indicates the second numerical time unit and the index of the first HARQ process, or indicates the first numerical time unit and the index of the first HARQ process;

and/or the presence of a gas in the gas,

a second state indicated by the low T bits of the third field is used for determining transmission information of a transport block;

wherein S and T are positive integers.

In some embodiments of the present application, the value of T is 2, and the lower 2 bits of the third field are a first bit and a second bit;

In some embodiments of the present application, the control information indicates that a HARQ acknowledgement delay is determined from a first set of acknowledgement delays when the first delay is a first number of time units;

when the first delay is a second number of time units, the control information indicates that a HARQ acknowledgement delay is determined from a second set of acknowledgement delays;

In some embodiments of the present application, the first set of acknowledgement delays comprises at least one of the following values: 4. 5,6,7,8,9, 10,11,13,15, 17;

wherein the numerical value is the number of time units.

the fourth field indicates a HARQ acknowledgement delay when the index of the first HARQ process belongs to the first set;

the fourth field indicates the second number of time units and the HARQ acknowledgement delay, or indicates the first number of time units and the HARQ acknowledgement delay, when the index of the first HARQ process belongs to the second set.

In some embodiments of the present application, the fourth field comprises Q bits when the index of the first HARQ process belongs to the second set, Q being a positive integer;

q bits of the fourth field indicate the first delay in a first set of delays and indicate the HARQ acknowledgement delay in a third set of acknowledgement delays;

wherein the numerical value is the number of time units.

In some embodiments of the present application, the first set is {0,1,2,3,4,5,6,7,8,9}, and the second set is {10,11,12,13 };

or the like, or, alternatively,

the first set is {0,1,2,3,4,5,6,7,8,9}, and the second set is {12,13,14,15 }.

In some embodiments of the present application, the first value is 2 and the second value is 7.

As can be seen from the foregoing description of the embodiment, both the first communication device and the second communication device may determine the starting time unit used for the first data transmission according to the ending time unit and the first time delay of the control information, where the first communication device determines that the first time delay is a first number of time units when the index of the first HARQ process belongs to the first set, and determines that the first time delay is the first number of time units or a second number of time units when the index of the first HARQ process belongs to the second set, where the first number is not equal to the second number, and the first set and the second set include indexes of different HARQ processes. Therefore, the specific value of the first delay can be determined according to whether the index of the first HARQ process belongs to the first set or the second set, and the specific value of the first delay is the delay that can be determined by the first communication device and the second communication device, so that the terminal device can correctly receive the first data, the complexity of a receiving algorithm of the first communication device is reduced, the complexity of a sending algorithm of the second communication device is also reduced, the indication flexibility is improved, the signaling overhead is reduced, and the resource utilization rate of the system is improved.

The embodiment of the present application further provides a computer storage medium, where the computer storage medium stores a program, and the program executes some or all of the steps described in the above method embodiments.

As shown in fig. 8, which is a schematic structural diagram of another device in the embodiment of the present application, the device is a first communication device, and the first communication device may include: a processor 121 (e.g., a CPU), a memory 122, a transmitter 124, and a receiver 123; the transmitter 124 and the receiver 123 are coupled to a processor 121, and the processor 121 controls the transmitting action of the transmitter 124 and the receiving action of the receiver 123. The memory 122 may comprise a high-speed RAM memory, and may also include a non-volatile memory NVM, such as at least one disk memory, in which various instructions may be stored for performing various processing functions and implementing the method steps of the embodiments of the present application. Optionally, the first communication device related to the embodiment of the present application may further include: one or more of a power supply 125, a communication bus 126, and a communication port 127. The receiver 123 and the transmitter 124 may be integrated in the transceiver of the first communication device, or may be separate transmitting and receiving antennas of the first communication device. The communication bus 126 is used to implement communication connections between the elements. The communication port 127 is used for realizing connection communication between the first communication device and other peripheral devices.

In the embodiment of the present application, the memory 122 is used for storing computer executable program codes, and the program codes include instructions; when the processor 121 executes the instruction, the instruction causes the processor 121 to execute the processing action of the first communication device in the foregoing method embodiment, and causes the transmitter 124 to execute the transmitting action of the first communication device in the foregoing method embodiment, which has similar implementation principles and technical effects, and is not described herein again.

As shown in fig. 9, which is a schematic structural diagram of another device in the embodiment of the present application, the device is a second communication device, and the second communication device may include: a processor (e.g., CPU)131, a memory 132, a receiver 133, and a transmitter 134; the receiver 133 and the transmitter 134 are coupled to the processor 131, and the processor 131 controls the receiving action of the receiver 133 and the transmitting action of the transmitter 134. The memory 132 may comprise a high-speed RAM memory, and may also include a non-volatile memory NVM, such as at least one disk memory, in which various instructions may be stored for performing various processing functions and implementing the method steps of the embodiments of the present application. Optionally, the second communication device according to the embodiment of the present application may further include: one or more of a power supply 135, a communication bus 136, and a communication port 137. The receiver 133 and the transmitter 134 may be integrated in a transceiver of the second communication device, or may be separate transmitting and receiving antennas of the second communication device. The communication bus 136 is used to enable communication connections between the elements. The communication port 137 is used for realizing connection and communication between the second network device and other peripherals.

In another possible design, when the communication device is a chip in a terminal device or a network device, the chip includes: a processing unit, which may be for example a processor, and a communication unit, which may be for example an input/output interface, a pin or a circuit, etc. The processing unit may execute computer-executable instructions stored by the storage unit to cause a chip within the terminal to perform the wireless communication method of any one of the above first aspects. Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, and the like, and the storage unit may also be a storage unit located outside the chip in the terminal, such as a read-only memory (ROM) or another type of static storage device that can store static information and instructions, a Random Access Memory (RAM), and the like.

The processor mentioned in any of the above may be a general-purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling execution of a program of the wireless communication method according to the first aspect.

It should be noted that the above-described embodiments of the apparatus are merely schematic, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiments of the apparatus provided in the present application, the connection relationship between the modules indicates that there is a communication connection therebetween, and may be implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented by software plus necessary general-purpose hardware, and certainly can also be implemented by special-purpose hardware including special-purpose integrated circuits, special-purpose CPUs, special-purpose memories, special-purpose components and the like. Generally, functions performed by computer programs can be easily implemented by corresponding hardware, and specific hardware structures for implementing the same functions may be various, such as analog circuits, digital circuits, or dedicated circuits. However, for the present application, the implementation of a software program is more preferable. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a readable storage medium, such as a floppy disk, a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk of a computer, and includes instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods described in the embodiments of the present application.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may 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 loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Claims

A method of data transmission, comprising:

the method comprises the steps that a first communication device receives control information sent by a second communication device, wherein the control information indicates an index of a first hybrid automatic repeat request (HARQ) process corresponding to first data transmission;

the first communication equipment determines the index of the first HARQ process according to the control information;

the first communication device determines a starting time unit used for the first data transmission according to an ending time unit and a first time delay of the control information, wherein when the index of the first HARQ process belongs to a first set, the first communication device determines that the first time delay is a first value of time unit, and when the index of the first HARQ process belongs to a second set, the first communication device determines that the first time delay is the first value of time unit or a second value of time unit, the first value is not equal to the second value, and the first set and the second set comprise indexes of different HARQ processes;

the first communication device receives the first data according to the determined starting time unit.
The method of claim 1, further comprising:

the first communication device receives first information sent by the second communication device, wherein the first information is used for indicating that the index of the first HARQ process can or cannot belong to the second set;

on a condition that the first information indicates that the index of the first HARQ process can belong to the second set, when the index of the first HARQ process belongs to the first set, the first communication device determines that the transmission of the first data adopts an asynchronous HARQ manner; and when the index of the first HARQ process belongs to a second set, the first communication equipment determines that the transmission of the first data adopts a synchronous HARQ mode.
A method of data transmission, comprising:

the second communication equipment determines an index of a first hybrid automatic repeat request (HARQ) process corresponding to the first data transmission;

the second communication device sends control information to the first communication device, wherein the control information indicates an index of the first HARQ process;

the second communication device determines a starting time unit used for the first data transmission according to an ending time unit and a first time delay of the control information, wherein when the index of the first HARQ process belongs to a first set, the second communication device determines that the first time delay is a first value of time unit, and when the index of the first HARQ process belongs to a second set, the second communication device determines that the first time delay is the first value of time unit or a second value of time unit, the first value is not equal to the second value, and the first set and the second set comprise indexes of different HARQ processes;

and the second communication equipment sends the first data according to the determined starting time unit.
The method of claim 3, further comprising:

the second communication device sends first information to the first communication device, wherein the first information is used for indicating that the index of the first HARQ process can or cannot belong to the second set;

on the condition that the first information indicates that the index of the first HARQ process can belong to the second set, when the index of the first HARQ process belongs to the first set, the second communication device determines that the transmission of the first data adopts an asynchronous HARQ mode; and when the index of the first HARQ process belongs to a second set, the second communication equipment determines that the transmission of the first data adopts a synchronous HARQ mode.
The method according to any of claims 1 to 4, wherein the control information comprises: a first field in which, among other things,

when the index of the first HARQ process belongs to the first set, the first field indicates HARQ acknowledgement delay;

the first field includes transmission information of a set of transmission blocks, or the first field is a reserved field, when the index of the first HARQ process belongs to the second set.
The method of claim 5, wherein the first field comprises N bits when the index of the first HARQ process belongs to the second set, and wherein N is a positive integer;

the N bits of the first field indicate whether each transport block in the transport block set is scheduled by means of a bitmap.
The method according to any of claims 1 to 4, wherein the control information comprises: a second field and a third field, wherein,

when the high S bits of the third field indicate a first state, the second field indicates the second numerical time unit and the index of the first HARQ process, or indicates the first numerical time unit and the index of the first HARQ process;

and/or the presence of a gas in the gas,

a second state indicated by the low T bits of the third field is used for determining transmission information of a transport block;

wherein S and T are positive integers.
The method of claim 7, wherein the value of T is 2, and the lower 2 bits of the third field are a first bit and a second bit;

the first bit indicates whether the transport block is scheduled, and the second bit indicates whether the transport block is a newly transmitted transport block or a retransmitted transport block.
The method according to claim 5 or 6, wherein the HARQ acknowledgement delay comprises: d time units, wherein the value of D is 13,14,15, 17 or 19.
The method according to any one of claims 1 to 4,

when the first time delay is a first value of time unit, the control information indicates that HARQ acknowledgement time delay is determined from a first acknowledgement time delay set;

when the first delay is a second number of time units, the control information indicates that a HARQ acknowledgement delay is determined from a second set of acknowledgement delays;

wherein the first set of acknowledgement delays and the second set of acknowledgement delays comprise different HARQ acknowledgement delays.
The method of claim 10, wherein the first set of acknowledgement delays comprises at least one of: 4. 5,6,7,8,9, 10,11,13,15, 17;

the second set of acknowledgement delays comprises at least one of the following values: 13. 14,15,16,19, 26;

wherein the numerical value is the number of time units.
The method according to any of claims 1 to 11, wherein the control information comprises: a fourth field in which, if any,

the fourth field indicates a HARQ acknowledgement delay when the index of the first HARQ process belongs to the first set;

the fourth field indicates the second number of time units and the HARQ acknowledgement delay, or indicates the first number of time units and the HARQ acknowledgement delay, when the index of the first HARQ process belongs to the second set.
The method of claim 12, wherein the fourth field comprises Q bits when the index of the first HARQ process belongs to the second set, and wherein Q is a positive integer;

q bits of the fourth field indicate the first delay in a first set of delays and indicate the HARQ acknowledgement delay in a third set of acknowledgement delays;

wherein the first set of time delays comprises at least one of the following values: 2. p is a positive integer greater than or equal to 7;

the third set of acknowledgement delays comprises at least one of the following values: 4. 5, 7, 13;

wherein the numerical value is the number of time units.
The method according to any one of claims 1 to 13, wherein the first set is {0,1,2,3,4,5,6,7,8,9}, and the second set is {10,11,12,13 };

or the like, or, alternatively,

the first set is {0,1,2,3,4,5,6,7,8,9}, and the second set is {12,13,14,15 }.
The method of any one of claims 1 to 14, wherein the first value is 2 and the second value is 7.
A communication device, specifically a first communication device, the first communication device comprising: a processing module and a transceiver module, wherein,

the receiving and sending module is configured to receive control information sent by a second communication device, where the control information indicates an index of a first hybrid automatic repeat request HARQ process corresponding to a first data transmission;

the processing module is configured to determine an index of the first HARQ process according to the control information;

the processing module is configured to determine a starting time unit used for the first data transmission according to an ending time unit and a first time delay of the control information, where the first communication device determines that the first time delay is a first number of time units when the index of the first HARQ process belongs to a first set, and determines that the first time delay is the first number of time units or a second number of time units when the index of the first HARQ process belongs to a second set, where the first number is not equal to the second number, and the first set and the second set include indexes of different HARQ processes;

the transceiver module is configured to receive the first data according to the determined start time unit.
The communication device of claim 16,

the transceiver module is configured to receive first information sent by the second communications device, where the first information is used to indicate that an index of the first HARQ process may or may not belong to the second set;

the processing module is configured to determine that the transmission of the first data adopts an asynchronous HARQ scheme when the index of the first HARQ process belongs to the first set under the condition that the first information indicates that the index of the first HARQ process can belong to the second set; and when the index of the first HARQ process belongs to a second set, determining that the transmission of the first data adopts a synchronous HARQ mode.
A communication device, wherein the communication device is specifically a second communication device, and the second communication device includes: a processing module and a transceiver module, wherein,

the processing module is configured to determine an index of a first hybrid automatic repeat request HARQ process corresponding to a first data transmission;

the transceiver module is configured to send control information to a first communication device, where the control information indicates an index of the first HARQ process;

the processing module is configured to determine a starting time unit used for the first data transmission according to an ending time unit and a first time delay of the control information, where the second communication device determines that the first time delay is a first number of time units when the index of the first HARQ process belongs to a first set, and determines that the first time delay is the first number of time units or a second number of time units when the index of the first HARQ process belongs to a second set, where the first number is not equal to the second number, and the first set and the second set include indexes of different HARQ processes;

and the transceiver module is used for transmitting the first data according to the determined starting time unit.
The communication device of claim 18,

the transceiver module is configured to send first information to the first communication device, where the first information is used to indicate that an index of the first HARQ process may or may not belong to the second set;

the processing module is configured to, when the first information indicates that the index of the first HARQ process can belong to the second set, transmit the first data in an asynchronous HARQ manner when the index of the first HARQ process belongs to the first set; and when the index of the first HARQ process belongs to a second set, the transmission of the first data adopts a synchronous HARQ mode.
The communication device according to any of claims 16 to 19, wherein the control information comprises: a first field in which, among other things,

when the index of the first HARQ process belongs to the first set, the first field indicates HARQ acknowledgement delay;

the first field includes transmission information of a set of transmission blocks, or the first field is a reserved field, when the index of the first HARQ process belongs to the second set.
The communications device of claim 20, wherein the first field comprises N bits when the index of the first HARQ process belongs to the second set, the N being a positive integer;

the N bits of the first field indicate whether each transport block in the transport block set is scheduled by means of a bitmap.
The communication device according to any of claims 16 to 19, wherein the control information comprises: a second field and a third field, wherein,

when the high S bits of the third field indicate a first state, the second field indicates the second numerical time unit and the index of the first HARQ process, or indicates the first numerical time unit and the index of the first HARQ process;

and/or the presence of a gas in the gas,

a second state indicated by the low T bits of the third field is used for determining transmission information of a transport block;

wherein S and T are positive integers.
The communications device of claim 22, wherein the value of T is 2, and the lower 2 bits of the third field are a first bit and a second bit;

the first bit indicates whether the transport block is scheduled, and the second bit indicates whether the transport block is a newly transmitted transport block or a retransmitted transport block.
The communications device of claim 20 or 21, wherein the HARQ acknowledgement delay comprises: d time units, wherein the value of D is 13,14,15, 17 or 19.
The communication device according to any one of claims 16 to 19,

when the first time delay is a first value of time unit, the control information indicates that HARQ acknowledgement time delay is determined from a first acknowledgement time delay set;

when the first delay is a second number of time units, the control information indicates that a HARQ acknowledgement delay is determined from a second set of acknowledgement delays;

wherein the first set of acknowledgement delays and the second set of acknowledgement delays comprise different HARQ acknowledgement delays.
The communications device of claim 25, wherein the first set of acknowledgement delays comprises at least one of: 4. 5,6,7,8,9, 10,11,13,15, 17;

the second set of acknowledgement delays comprises at least one of the following values: 13. 14,15,16,19, 26;

wherein the numerical value is the number of time units.
The communication device according to any of claims 16 to 26, wherein the control information comprises: a fourth field in which, if any,

the fourth field indicates a HARQ acknowledgement delay when the index of the first HARQ process belongs to the first set;

the fourth field indicates the second number of time units and the HARQ acknowledgement delay, or indicates the first number of time units and the HARQ acknowledgement delay, when the index of the first HARQ process belongs to the second set.
The communications device of claim 27, wherein the fourth field comprises Q bits when the index of the first HARQ process belongs to the second set, Q being a positive integer;

q bits of the fourth field indicate the first delay in a first set of delays and indicate the HARQ acknowledgement delay in a third set of acknowledgement delays;

wherein the first set of time delays comprises at least one of the following values: 2. p is a positive integer greater than or equal to 7;

the third set of acknowledgement delays comprises at least one of the following values: 4. 5, 7, 13;

wherein the numerical value is the number of time units.
The communications device of any one of claims 16 to 28, wherein the first set is {0,1,2,3,4,5,6,7,8,9}, and the second set is {10,11,12,13 };

or the like, or, alternatively,

the first set is {0,1,2,3,4,5,6,7,8,9}, and the second set is {12,13,14,15 }.
The communication device according to any of claims 16 to 29, wherein the first value is 2 and the second value is 7.