WO2021062854A1 - 一种控制harq进程的方法以及装置 - Google Patents

一种控制harq进程的方法以及装置 Download PDF

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Publication number
WO2021062854A1
WO2021062854A1 PCT/CN2019/109783 CN2019109783W WO2021062854A1 WO 2021062854 A1 WO2021062854 A1 WO 2021062854A1 CN 2019109783 W CN2019109783 W CN 2019109783W WO 2021062854 A1 WO2021062854 A1 WO 2021062854A1
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WIPO (PCT)
Prior art keywords
terminal device
harq process
timer
transmitted
transmissions
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PCT/CN2019/109783
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English (en)
French (fr)
Inventor
余唱
常俊仁
王君
魏冬冬
刘南南
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201980100680.5A priority Critical patent/CN114450904B/zh
Priority to PCT/CN2019/109783 priority patent/WO2021062854A1/zh
Priority to EP19947470.1A priority patent/EP4030662A4/en
Publication of WO2021062854A1 publication Critical patent/WO2021062854A1/zh
Priority to US17/710,022 priority patent/US20220224454A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1803—Stop-and-wait protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1835—Buffer management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1848—Time-out mechanisms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a method and device for controlling a hybrid automatic repeat-request (HARQ) process.
  • HARQ hybrid automatic repeat-request
  • the terminal device and the terminal device can communicate wirelessly through a direct link, such as a sidelink (SL).
  • a direct link such as a sidelink (SL).
  • the HARQ mechanism is introduced in the V2X communication system, and HARQ uses a stop-and-wait protocol to send data.
  • the stop-and-wait protocol after the sender sends a transport block (TB), it stops and waits for the confirmation message.
  • the receiving end can use 1-bit information to acknowledge the TB (acknowledgement, ACK). ) Or a non-acknowledgement (NACK) confirmation.
  • ACK transport block
  • NACK non-acknowledgement
  • HARQ processes multiple parallel HARQ processes (HARQ processes) are used.
  • HARQ processes When one HARQ process is waiting for confirmation information, the sender can use another HARQ process to continue sending data.
  • HARQ processes together form a HARQ entity (HARQ entity), which combines the stop-and-wait protocol while allowing continuous data transmission.
  • a timer associated with the HARQ process is maintained at both ends of the transceiver, and the timer is used to limit the transmission time of a certain TB through the HARQ process.
  • the receiver and receiver have inconsistent understanding of each other's timers, which leads to low utilization of the HARQ process.
  • the embodiments of the present application provide a method and device for controlling HARQ processes, which can ensure that the receiver and sender have the same understanding of the timers associated with the same HARQ process, release the HARQ process and resources in time, and improve the performance of the HARQ process. Utilization rate, thereby improving the efficiency of system data transmission.
  • an embodiment of the present application provides a method for controlling a HARQ process, the method includes: a first terminal device determines that the TB transmitted through the first HARQ process is the last transmitted first TB or a newly transmitted TB, or , The number of the first TB transmitted through the first HARQ process reaches the maximum number of transmissions, and the first timer is stopped.
  • the first terminal device also sends to the second terminal device an instruction to indicate that the TB transmitted through the first HARQ process is a new transmission TB or the first TB transmitted in the last time, or to indicate that the TB transmitted through the first HARQ process
  • the first indication information that the number of the first TB reaches the maximum number of transmissions is used to instruct the second terminal device to stop the second timer.
  • an embodiment of the present application provides a method for controlling HARQ process.
  • the method includes: the first terminal device determines that the number of times of receiving NACK is equal to or more than M times, M is an integer greater than or equal to 1, and NACK is used for Indicate that the second terminal device does not correctly receive the first TB transmitted through the first HARQ process, and stop the first timer.
  • the first terminal device determines that the condition for triggering the stop of the first timer associated with the first HARQ process is satisfied, the first timer is stopped, and the first indication information is sent to the second terminal device,
  • the first indication information indicates that the condition for triggering the stop of the first timer associated with the first HARQ process is met, so that the second terminal device stops the HARQ associated with the first HARQ process in the second terminal device according to the indication of the first indication information The second timer associated with the process.
  • the transmitter and receiver can stop the timers associated with the HARQ process that they maintain based on the same trigger event, and align the behavior of the transmitter and receiver to stop the timers associated with the HARQ process that they maintain separately, so as to avoid the maintenance of the HARQ process by the transmitter and receiver.
  • the understanding of the stop time of the timer associated with the HARQ process is inconsistent, causing the HARQ of the receiving end to be locked and cannot be used to transmit other TBs, which is a waste of resources.
  • the sender can maintain the timer associated with the HARQ process based on the number of NACKs sent by the receiver.
  • the timer associated with the process ensures that the receiver and the receiver have consistent understanding of the stop time of the timer associated with the HARQ process maintained by each other, and improves the utilization of the HARQ process and resources.
  • the method further includes: the first terminal device releases the first HARQ process, and/or the first terminal device sends a notification to the network device to notify the network device to release Release notification of the first HARQ.
  • the first terminal device can release the first HARQ process and the sidelink transmission resources corresponding to the first TB transmitted through the first HARQ process in time after stopping the first timer, avoiding resource waste and improving the utilization of the HARQ process Rate, thereby improving the efficiency of system data transmission.
  • the first timer and the duration of the first timer are determined by the first terminal device Configuration, the first TB multiplexes one or more LCH data, the duration of the first timer is equal to the first parameter corresponding to the LCH with the highest priority among the one or more LCHs, or the first TB multiplexes one or more For data of a logical channel LCH, the duration of the first timer is equal to the first parameter with the smallest value among the first parameters corresponding to one or more LCHs.
  • the first parameter corresponding to the LCH may refer to a timer duration parameter of the LCH, and the first parameter corresponding to the LCH may be a pre-configured parameter or configured by a network device.
  • the duration of the first timer can be configured with LCH as the granularity, for example, the duration of the first timer can be configured as a duration parameter corresponding to the LCH with a higher priority, or configured as a duration parameter corresponding to the LCH
  • the duration parameter with the smallest value in the first timer enables the TB transmitted within the validity period of the first timer to meet the service quality requirements or delay requirements of each LCH multiplexed by it.
  • the duration of the first timer and the first timer may be pre-configured
  • the parameters may be configured by the network equipment. Based on this design, the network equipment can configure the relevant parameters of the first timer, such as: the duration of the first timer, which improves the management of the timer on the network side. At the same time, the configuration of the first terminal device is not required, which reduces the first terminal device. Design complexity.
  • the method further includes: the first terminal device receives the new transmission The instruction is to start the first timer according to the new transmission instruction, where the new transmission instruction is used to instruct the first terminal device to transmit a new TB through the first HARQ process.
  • the new transmission indication can be carried in the DCI or MAC CE message; or, the first terminal device receives the NACK sent by the second terminal device and starts the first timer, where the NACK is used to indicate that the second terminal device has not correctly received the first timer.
  • the first terminal device determines to retransmit the first TB to the second terminal device through the first HARQ process, and starts the first timer. Based on this design, the first terminal device can start the first timer in time when a new TB is transmitted or a NACK is received or the first TB is retransmitted, which is simple and easy to implement, and guarantees the normal transmission of TB, and improves the reliability of TB transmission. Sex.
  • the method further includes: if the first timer has not expired , And/or, the number of times of the first TB does not reach the maximum number of transmissions, if the second terminal device does not correctly receive the first TB and/or the resources used to transmit the first TB are less than the preset threshold, and/or, configured Under the premise of repetition, there are no remaining repetitive resources, and/or no reserved resources, the first terminal device acquires a new resource for transmitting the first TB; or, if the first timer has not expired, the first terminal device acquires a new resource for transmitting the first TB; The number of times of one TB does not reach the maximum number of transmissions, the resources used to transmit the first TB are less than the preset threshold, and/or, under the premise that repetition is configured, there are no remaining repetitive resources, and the first terminal device acquires new usage. For transmitting the first TB of resources.
  • the first terminal device acquiring the new resource for transmitting the first TB includes: the first terminal device acquires the resource for transmitting the first TB from the network equipment or the first terminal device independently selects the resource for transmitting the first TB Resource; or, the first terminal device triggers a resource request, and sends the resource request to the network, waiting for the network device to allocate transmission resources; or, the first terminal device triggers resource reselection and selects transmission resources from a pre-configured or configured resource pool , Or reserve retransmission resources.
  • the first terminal device can request a new device when the timer is running and/or the number of transmissions of the first TB has not reached the maximum number of transmissions, but the resources used to transmit the first TB are insufficient.
  • the sidelink resources used to transmit the first TB to ensure the normal transmission of the first TB.
  • the method further includes: the first terminal device receives the first The ACK fed back by the second terminal device, the first terminal device clears the buffer associated with the first HARQ process, and the ACK is used to indicate that the second terminal device correctly receives the first TB transmitted by the first terminal device through the first HARQ process.
  • the first terminal device receives the new transmission instruction from the network device, and the first terminal device clears the buffer associated with the first HARQ process according to the new transmission instruction, and the new transmission instruction is used to instruct the first terminal device to transmit the new transmission through the first HARQ process.
  • TB such as the second TB.
  • the first terminal device when the first terminal device successfully sends the first TB of the last transmission to the second terminal device through the first HARQ process, the first terminal device clears the buffer associated with the second HARQ process. Based on this possible design, the first terminal device can clear the buffer associated with the first HARQ process after the TB transmission is successful or when the TB is newly transmitted or after the last first TB is successfully transmitted, so that the buffer associated with the first HARQ process can be used.
  • the buffer stores other new terabytes. In this way, the buffer associated with the HARQ process that has successfully transmitted the first TB or is not suitable for transmitting the first TB can be cleared in time, and the storage capacity of the first terminal device can be improved. At the same time, new TBs are transmitted to improve the utilization of the HARQ process.
  • the embodiments of the present application also provide a device.
  • the device may be a first terminal device or a chip or a system on a chip in the first terminal device, and may also be a first terminal device for implementing the first aspect or the first terminal device.
  • the second aspect or any one of the first aspect and the second aspect may design the functional module of the method.
  • the device can implement the functions performed by the first terminal device in the foregoing aspects or various possible designs, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the device may include: a processing unit. Further, it also includes a sending unit;
  • the processing unit is configured to determine that the TB transmitted through the first HARQ process is the first TB transmitted in the last time or is a newly transmitted TB, or the number of the first TB transmitted through the first HARQ process reaches the maximum transmission Number of times, stop the first timer.
  • the sending unit is configured to send first indication information to the second terminal device, where the first indication information is used to indicate that the transmission block TB transmitted through the first HARQ process is the last transmitted first TB or a new transmission TB, or , Used to indicate that the number of the first TB transmitted through the first HARQ process reaches the maximum number of transmissions.
  • the processing unit is configured to determine that the number of times of receiving a negative acknowledgement NACK is equal to or more than M times, and stop the first timer.
  • the first terminal device determines that the condition for triggering the stop of the first timer associated with the first HARQ process is satisfied, the first timer is stopped, and at the same time, the first indication information is sent to the second terminal device,
  • the first indication information indicates that the condition for triggering the stop of the first timer associated with the first HARQ process is met, so that the second terminal device stops the HARQ associated with the first HARQ process in the second terminal device according to the indication of the first indication information The second timer of the process.
  • the first terminal device stops the timer associated with the HARQ process based on the number of TBs in which the transmission fails.
  • the sending and receiving ends stop the timers associated with the HARQ process that they maintain separately based on the same trigger event, and align the behavior of the sending and receiving ends to stop the timers associated with the HARQ process that they maintain separately, so as to avoid the fact that the sending and receiving ends maintain their own timers.
  • the understanding of the stop time of the timer associated with the HARQ process is inconsistent, causing the HARQ at the receiving end to be locked and cannot be used to transmit other TBs, which is a waste of resources.
  • the processing unit is further configured to release the first HARQ process, and/or, through the sending unit, send a release notification for notifying the network device to release the first HARQ to the network device.
  • the first terminal device may stop the first timer or at the same time.
  • the specific time is not limited.
  • Corresponding sidelink transmission resources avoid waste of resources and increase the utilization rate of the HARQ process, thereby improving the efficiency of system data transmission.
  • the first timer and the duration of the first timer are configured by the first terminal device, and the first TB multiplexes one or more LCHs
  • the length of the first timer is equal to the first parameter corresponding to the LCH with the highest priority among one or more LCHs, or the first TB multiplexes one or more logical channel LCH data, and the first timer’s
  • the duration is equal to the first parameter with the smallest value among the first parameters corresponding to one or more LCHs.
  • the first parameter corresponding to the LCH refers to the timer duration in the configuration of the LCH, and the first parameter corresponding to the LCH is a pre-configured parameter or is configured by a network device.
  • the duration of the first timer can be configured with LCH as the granularity, for example, the duration of the first timer can be configured as the duration corresponding to the LCH with higher priority, or the duration corresponding to the LCH has the smallest value.
  • the TB transmitted within the validity period of the first timer meets the quality of service requirements of each LCH.
  • the first timer and the duration of the first timer are pre-configured parameters or configured by the network device.
  • the network equipment can configure the relevant parameters of the first timer, such as: the duration of the first timer, which improves the management of the timer on the network side. At the same time, the configuration of the first terminal device is not required, which reduces the first timer. The design complexity of the terminal device.
  • the device further includes: a receiving unit for receiving a new transmission instruction, and the processing unit for receiving a new transmission instruction , Start the first timer, where the new transmission instruction is used to instruct the first terminal device to transmit a new TB through the first HARQ process, and the new transmission instruction is carried in the DCI or MAC CE; or the first terminal device receives the second terminal
  • the NACK sent by the device starts the first timer, where the NACK is used to indicate that the second terminal device did not correctly receive the first TB, and N is an integer greater than or equal to 1; or, the first terminal device determines to pass the first HARQ process Retransmit the first TB to the second terminal device and start the first timer.
  • the first timer can be started, which is simple and easy to implement, guarantees the normal transmission of TB, and improves the reliability of TB transmission.
  • the processing unit is further configured to: if the first timer does not expire and/or the number of first TBs does not reach the maximum transmission If the second terminal device does not correctly receive the first TB and the resource used to transmit the first TB is less than the preset threshold, acquire a new resource used to transmit the first TB; or, if the first timer has not expired, The number of times of the first TB does not reach the maximum number of transmissions, the resource used for transmitting the first TB is less than the preset threshold, and a new resource used for transmitting the first TB is acquired.
  • TB sidelink resources ensure the normal transmission of the first TB.
  • the receiving unit is further configured to receive the ACK fed back by the second terminal device, and the processing unit is configured to clear the first A buffer associated with the HARQ process, ACK is used to indicate that the second terminal device correctly receives the first TB transmitted by the first terminal device through the first HARQ process, or the receiving unit is used to receive a new transmission from a network device Instruction, the processing unit is configured to clear the buffer associated with the second HARQ process according to the new transmission instruction, and the new transmission instruction is used to instruct the first terminal device to transmit a new TB through the first HARQ process; or, the processing unit, It is also used to clear the buffer associated with the second HARQ process when the first terminal device successfully sends the first TB of the last transmission to the second terminal device through the first HARQ process.
  • the buffer associated with the first HARQ process can be cleared after the TB transmission is successful or when a new TB is transmitted or the last first TB is successfully sent, and the buffer associated with the first HARQ process can be used to store other new TBs. .
  • the buffer associated with the HARQ process that successfully transmits TB or is not conducive to TB transmission can be cleaned up in time, and the storage capacity of the first terminal device can be improved.
  • new TBs are transmitted to improve the utilization of the HARQ process.
  • a device in a fourth aspect, may be a first terminal device or a chip or a system on a chip in the first terminal device.
  • the device can implement the functions performed by the first terminal device in each of the foregoing aspects or various possible designs, and the functions can be implemented by hardware.
  • the device may include: at least one processor and a transceiver circuit, and related program instructions are executed in the at least one processor, so that the communication device implements the first aspect or the second aspect or the first aspect And any possible design of the second aspect.
  • the processor determines that the TB transmitted through the first HARQ process is the first TB transmitted in the last time or is a newly transmitted TB, or the number of the first TB transmitted through the first HARQ process reaches the maximum number of transmissions, and stops the first timing And send the first indication information to the second terminal device through the transceiver circuit, where the first indication information is used to indicate that the transmission block TB transmitted through the first HARQ process is the first TB transmitted in the last time or the new transmission TB, Or, it is used to indicate that the number of times of the first TB transmitted through the first HARQ process reaches the maximum number of transmissions.
  • the processor determines that the number of times of receiving negative acknowledgement NACK is equal to or exceeds M times, and stops the first timer.
  • the device may further include a memory, and the memory is used to store necessary computer-executed instructions and data of the device.
  • the processor executes the computer-executable instructions stored in the memory, so that the device executes the HARQ process control method as described in the first aspect or any one of the possible designs of the first aspect.
  • a computer-readable storage medium may be a readable non-volatile storage medium, and the computer-readable storage medium stores instructions when it runs on a computer. , Enabling the computer to execute the method for controlling the HARQ process described in the first aspect or the second aspect or any one of the possible designs of the foregoing aspects.
  • a computer program product containing instructions which when running on a computer, causes the computer to execute the control HARQ process described in the first aspect or the second aspect or any one of the foregoing aspects.
  • a device in a seventh aspect, is provided.
  • the device may be a first terminal device or a chip or a system on a chip in the first terminal device.
  • the device includes one or more processors and one or more memories.
  • the one or more memories are coupled with the one or more processors, and the one or more memories are used to store computer program codes, and the computer program codes include computer instructions.
  • the apparatus When the one or more processors When the computer instruction is executed, the apparatus is caused to execute the method for controlling the HARQ process as described in the first aspect or the second aspect or any possible design of the foregoing aspect.
  • the technical effect brought by any one of the design methods of the third aspect to the seventh aspect can be referred to the above-mentioned first aspect or the second aspect or any possible design of the first aspect and the second aspect. The technical effect will not be repeated here.
  • an embodiment of the present application also provides a method for controlling HARQ process, the method further includes: the second terminal device receives from the first terminal device the instruction to indicate that the TB transmitted through the first HARQ process is the last transmission The first TB is either a newly transmitted TB, or the first indication information indicating that the number of times the first TB corresponding to the first HARQ process reaches the maximum number of transmission times, and the second timer is stopped according to the first indication information.
  • an embodiment of the present application also provides a method for controlling the HARQ process.
  • the method includes: the second terminal device determines that the number of times that the NACK is fed back to the first terminal device exceeds M times, and stops the second timer.
  • the first indication information is sent to the second terminal device, and the first The indication information indicates that the condition for triggering the stop of the first timer associated with the first HARQ process is met, and the second terminal device stops the second timing of the HARQ process associated with the first HARQ process in the second terminal device according to the indication of the first indication information Device.
  • the second terminal device stops the timer associated with the HARQ process based on the number of TBs whose transmission fails.
  • the transmitter and receiver stop the timers associated with the HARQ process that they maintain based on the same trigger event, and align the behavior of the transmitter and receiver to stop the timers associated with the HARQ process that they maintain separately, so as to prevent the transmitter and receiver from interacting with the HARQ process they maintain.
  • the inconsistent understanding of the stop time of the timer associated with the process leads to the problem of the HARQ of the receiving end being locked and unable to be used for transmitting other TBs, which is a waste of resources.
  • M is configured by the first terminal device to the second terminal device.
  • the first terminal device can configure the maximum number of transmissions to the second terminal device, so that both ends of the transceiver have the same understanding of the maximum number of transmissions, and further, the two ends of the transceiver are stopped according to the maximum number of transmissions of the TB.
  • the time points of the timers are aligned.
  • the second terminal device receives the configuration information from the first terminal device, and starts the second terminal device according to the configuration information.
  • the second terminal device can start the second timer according to the instruction of the first terminal device or the instruction of the network device, so that the time point of starting the timer is aligned with the time point of starting the timer of the originator.
  • the second timer and the duration of the second timer are pre-configured parameters or set by the network device Configuration; or, the second timer and the duration of the second timer are configured by the first terminal device; or, the second timer and the duration of the second timer are configured by the second terminal device.
  • the first terminal device can configure the timer and the duration of the timer, so that both ends of the transceiver have the same understanding of the timer.
  • the method further includes: during the operation of the second timer, the second terminal device The first terminal device feeds back the ACK or NACK corresponding to the first TB; or, during the running of the second timer, the second terminal device merges the TBs in the buffer buffer associated with the second HARQ process.
  • the second terminal device normally processes the received TB during the operation of the second timer, thereby improving the processing efficiency and transmission reliability of the TB.
  • the method further includes: the second terminal device clears the buffer associated with the second HARQ process , The second terminal device stops receiving the first TB through the second HARQ process, and receives the second TB through the second HARQ process.
  • the second terminal device can clear the buffer associated with the second HARQ process, and use the buffer associated with the second HARQ process to store other new TBs.
  • the buffer associated with the HARQ process that successfully transmits TB or is not conducive to TB transmission can be cleaned up in time, and the storage capacity of the second terminal device can be improved.
  • new TBs are transmitted to improve the utilization of the HARQ process.
  • an embodiment of the present application further provides a device, which may be a second terminal device or a chip or a system on a chip in the second terminal device, and may also be a second terminal device for implementing the eighth aspect or the first terminal device.
  • the ninth aspect or any one of the eighth aspect and the ninth aspect may design the functional module of the method.
  • the device can implement the functions performed by the second terminal device in the foregoing aspects or various possible designs, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the device may include: a receiving unit and a processing unit;
  • the receiving unit is configured to receive first indication information from the first terminal device, where the first indication information is used to indicate that the transmission block TB transmitted through the first HARQ process is the first TB transmitted in the last time or It is a newly transmitted TB, or it indicates that the number of times of passing the first TB corresponding to the first HARQ process reaches the maximum number of transmissions.
  • the processing unit is configured to stop the second timer according to the first indication information, where the second timer is associated with the second HARQ process, and the second HARQ process is associated with the first HARQ process.
  • the processing unit is configured to determine that the number of times that the negative acknowledgement NACK is fed back to the first terminal device exceeds M times, and stop the second timer.
  • the first indication information is sent to the second terminal device, and the first indication information is used to indicate that the first HARQ process is triggered
  • the condition for stopping the associated first timer is satisfied, and the second terminal device stops the second timer of the HARQ process associated with the first HARQ process in the second terminal device according to the indication of the first indication information.
  • the second terminal device stops the timer associated with the HARQ process based on the number of TBs whose transmission fails.
  • the transmitter and receiver stop the timers associated with the HARQ process that they maintain based on the same trigger event, and align the behavior of the transmitter and receiver to stop the timers associated with the HARQ process that they maintain separately, so as to prevent the transmitter and receiver from interacting with the HARQ process they maintain.
  • the inconsistent understanding of the stop time of the timer associated with the process leads to the problem of the HARQ of the receiving end being locked and unable to be used for transmitting other TBs, which is a waste of resources.
  • M is configured by the first terminal device to the second terminal device.
  • the first terminal device can configure the maximum number of transmissions to the second terminal device, so that both ends of the transceiver have the same understanding of the maximum number of transmissions, and further, the two ends of the transceiver are stopped according to the maximum number of transmissions of the TB.
  • the time points of the timers are aligned.
  • the processing unit is configured to receive configuration information from the first terminal device through the receiving unit, and start the second timer according to the configuration information , Wherein the configuration information is used to instruct the second terminal device to start the second timer; or, through the receiving unit, a restart instruction for instructing to restart the second timer is received from the network device, and the second timer is started according to the restart instruction.
  • the second timer can be started according to the instruction of the first terminal device or the instruction of the network device, so that the time point when the timer is started is aligned with the time point when the originator starts the timer.
  • the second timer and the duration of the second timer are pre-configured parameters or configured by the network device; or, the second timer And the duration of the second timer is configured by the first terminal device; or, the duration of the second timer and the second timer are configured by the second terminal device.
  • the first terminal device can configure the timer and the duration of the timer, so that both ends of the transceiver have the same understanding of the timer.
  • the device further includes: a sending unit, configured to feed back the first TB to the first terminal device during the operation of the second timer Corresponding ACK or NACK; or, the processing unit is also used during the running of the second timer to perform merging processing on the TBs in the buffer buffer associated with the second HARQ process.
  • the second terminal device normally processes the received TB during the operation of the second timer, thereby improving the processing efficiency and transmission reliability of the TB.
  • the processing unit further includes: clearing the buffer associated with the second HARQ process, stopping receiving the first TB through the second HARQ process, Receive the second TB through the second HARQ process.
  • the buffer associated with the second HARQ process can be cleared, and the buffer associated with the second HARQ process can be used to store other new TBs.
  • the buffer associated with the HARQ process that successfully transmits TB or is not conducive to TB transmission can be cleaned up in time, and the storage capacity of the second terminal device can be improved.
  • new TBs are transmitted to improve the utilization of the HARQ process.
  • a device in an eleventh aspect, is provided, and the device may be a second terminal device or a chip or a system on a chip in the second terminal device.
  • the device can implement the functions performed by the second terminal device in each of the foregoing aspects or various possible designs, and the functions can be implemented by hardware.
  • the device may include: at least one processor and a transceiver circuit, and related program instructions are executed in the at least one processor, so that the communication device implements the eighth aspect or the ninth aspect or the eighth aspect And any possible design of the ninth aspect.
  • the processor receives from the first terminal device through the transceiver circuit and is used to indicate that the transport block TB transmitted through the first HARQ process is the last transmitted first TB or a new transmission TB, or indicates that the transmission block TB transmitted through the first HARQ process corresponds to According to the first indication information indicating that the number of times of the first TB reaches the maximum number of transmissions, the second timer is stopped according to the first indication information.
  • the processing unit determines that the number of times of feeding back negative acknowledgement NACK to the first terminal device exceeds M times, and stops the second timer.
  • the device may further include a memory, and the memory is used to store necessary computer-executed instructions and data of the device. When the device is running, the processor executes the computer-executable instructions stored in the memory, so that the device executes the method for controlling the HARQ process as described in the eighth aspect or any one of the possible designs of the eighth aspect.
  • a computer-readable storage medium may be a readable non-volatile storage medium, and the computer-readable storage medium stores instructions.
  • the computer is caused to execute the method for controlling the HARQ process described in the eighth aspect or any one of the possible designs of the foregoing aspects.
  • a computer program product containing instructions which when running on a computer, enables the computer to execute the method for controlling the HARQ process described in the eighth aspect or any one of the possible designs of the foregoing aspects.
  • a device in a fourteenth aspect, is provided.
  • the device may be a second terminal device or a chip or a system on a chip in the second terminal device.
  • the device includes one or more processors and one or more memories.
  • the one or more memories are coupled with the one or more processors, and the one or more memories are used to store computer program codes, and the computer program codes include computer instructions.
  • the device When the one or more processors When the computer instruction is executed, the device is caused to execute the HARQ process control method described in the eighth aspect or any possible design of the eighth aspect.
  • an embodiment of the present application also provides a method for controlling HARQ process, the method further includes: the second terminal device successfully decodes the first TB corresponding to the second HARQ process transmitted by the first terminal device, or, Send the ACK corresponding to the first TB to the first terminal device, or generate an ACK to send to the first terminal device, or receive a new transmission instruction from the first terminal device for instructing the new transmission of the TB through the second HARQ process Or, the distance between the second terminal device and the first terminal device is greater than the preset distance, the second terminal device clears the buffer associated with the second HARQ process, and the second terminal device stops receiving the first TB through the second HARQ process, Receive the second TB through the second HARQ process.
  • the second terminal device successfully decodes the first TB received by the second terminal device through the second HARQ process, or sends the ACK corresponding to the first TB to the first terminal device, or, Generate an ACK to be sent to the first terminal device, or receive a new transmission instruction from the first terminal device, or, in the case that the distance between the second terminal device and the first terminal device is greater than the preset distance, clear the second terminal device
  • the buffer associated with the HARQ process uses the buffer associated with the second HARQ process to store other new TBs. In this way, the buffer associated with the HARQ process that successfully transmits TB or is not conducive to TB transmission can be cleaned up in time, and the storage capacity of the second terminal device can be improved.
  • the embodiments of the present application also provide a device.
  • the device may be a second terminal device or a chip or a system on a chip in the second terminal device, and may also be a second terminal device for implementing the fifteenth aspect. Or any of its possible design functional modules of the described method.
  • the device can implement the functions performed by the second terminal device in the foregoing aspects or various possible designs, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the device may include: a processing unit;
  • the processing unit is configured to transmit the corresponding first TB after successfully decoding the second HARQ process transmitted by the first terminal device, or send the ACK corresponding to the first TB to the first terminal device, or generate the data sent to the first terminal device ACK, or receiving a new transmission instruction from the first terminal device to indicate a new transmission of the TB through the second HARQ process, or, the distance between the second terminal device and the first terminal device is greater than the preset distance, and the second When the terminal device empties the buffer buffer associated with the second HARQ process, it stops receiving the first TB through the second HARQ process and receives the second TB through the second HARQ process.
  • the first TB received by the second terminal device through the second HARQ process may be successfully decoded, or the ACK corresponding to the first TB may be sent to the first terminal device, or the ACK corresponding to the first TB may be sent to the first terminal device.
  • the second HARQ process association is cleared Use the buffer associated with the second HARQ process to store other new TBs. In this way, the buffer associated with the HARQ process that successfully transmits TB or is not conducive to TB transmission can be cleaned up in time, and the storage capacity of the second terminal device can be improved.
  • a device in a seventeenth aspect, is provided, and the device may be a second terminal device or a chip or a system on a chip in the second terminal device.
  • the device can implement the functions performed by the second terminal device in each of the foregoing aspects or various possible designs, and the functions can be implemented by hardware.
  • the device may include: at least one processor and a transceiver circuit, and related program instructions are executed in the at least one processor, so that the communication device implements the fifteenth aspect or any of its possible designs .
  • the processor is configured to successfully decode the second HARQ process transmitted by the first terminal device to transmit the corresponding first transmission block TB, or send an acknowledgement ACK corresponding to the first TB to the first terminal device, or generate an acknowledgement ACK to the first terminal device. If the terminal device sends an acknowledgement ACK, or receives a new transmission instruction from the first terminal device, or the distance between the second terminal device and the first terminal device is greater than the preset distance, clear the second HARQ process The associated cache buffer stops receiving the first TB through the second HARQ process, and receives the second TB through the second HARQ process.
  • the device may further include a memory, and the memory is used to store necessary computer-executed instructions and data of the device. When the device is running, the processor executes the computer-executable instructions stored in the memory, so that the device executes the method for controlling the HARQ process as described in the eighth aspect or any one of the possible designs of the eighth aspect.
  • a computer-readable storage medium may be a readable non-volatile storage medium, and the computer-readable storage medium stores instructions when it runs on a computer. , Let the computer execute the method for controlling the HARQ process described in the fifteenth aspect or any one of the possible designs of the fifteenth aspect.
  • a computer program product containing instructions When it runs on a computer, the computer can execute the method for controlling the HARQ process described in the fifteenth aspect or any one of the possible designs of the foregoing aspects. .
  • a device may be a second terminal device or a chip or a system on a chip in the second terminal device.
  • the device includes one or more processors and one or more memories.
  • the one or more memories are coupled with the one or more processors, and the one or more memories are used to store computer program codes, and the computer program codes include computer instructions.
  • the device is caused to execute the method for controlling the HARQ process of the fifteenth aspect or any possible design of the fifteenth aspect.
  • the technical effect brought by any one of the fifteenth aspect to the twentieth aspect can refer to the fifteenth aspect or the ninth aspect, or any possible design of the fifteenth aspect and the ninth aspect.
  • the technical effects brought about will not be repeated here.
  • the embodiment of the present application also provides a method for controlling HARQ process, the method includes: the first terminal device transmits the first TB to the second terminal device through the first HARQ process, and the first terminal device transmits the first TB according to the first HARQ process.
  • the maximum number of transmissions and/or the first timer determines to release the first HARQ process.
  • the first terminal device can comprehensively consider the timer and the maximum number of transmissions of the TB, and determine whether to release the first HARQ process according to the timer and the maximum number of transmissions of the TB, and stop the first HARQ associated
  • the first timer in this way, enables the sender not only to determine to release the first HARQ process based on the timer or the maximum number of transmissions of the TB, and to increase the transmission requirements of the TB.
  • the first terminal device determines to release the first HARQ process according to the maximum number of transmissions and the first timer, including: The number of the first TB transmitted by the first HARQ process is less than the maximum number of transmissions, and when the first timer expires/stops, the first terminal device determines to release the first HARQ process.
  • the timer is used to control the first terminal device to release the first HARQ process, so as to avoid the problem of large time delay caused by transmission of all TBs.
  • the first terminal device determines to release the first HARQ process according to the maximum number of transmissions and the first timer, including: When the number of times the first HARQ process transmits the first TB is equal to or exceeds the maximum number of transmission times, the first terminal device determines to release the first HARQ process.
  • the first terminal device is controlled to release the first HARQ process based on the maximum number of transmissions, so as to prevent the HARQ process from failing when the timer has not expired when all TBs have been transmitted this time, and the HARQ process has not been released.
  • the method further includes: the first terminal device notifies the second terminal device of the expiration/stop of the first timer, Or, the number of the first TB transmitted through the first HARQ process is equal to or exceeds the maximum number of transmissions, or the first HARQ process is released.
  • the first terminal device can notify the second terminal device to time out/stop, or the number of the first TB transmitted through the first HARQ process is equal to or exceeds the maximum number of transmissions, or the first HARQ process is released, so that The second terminal device also releases the second HARQ synchronously, so as to avoid the problem of the HARQ process being locked because the second HARQ process has not been released yet, and the problem of resource waste.
  • the embodiments of the present application also provide a device, which may be a second terminal device or a chip or a system on a chip in the second terminal device, and may also be a second terminal device for implementing the twentieth
  • a device which may be a second terminal device or a chip or a system on a chip in the second terminal device, and may also be a second terminal device for implementing the twentieth
  • the device can implement the functions performed by the second terminal device in the foregoing aspects or various possible designs, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the device may include: a sending unit and a processing unit;
  • the sending unit is configured to transmit the first TB to the second terminal device through the first HARQ process.
  • the processing unit is configured to determine to release the first HARQ process according to the maximum number of transmissions and/or the first timer.
  • the timer and the maximum transmission times of the TB can be considered comprehensively, and the first HARQ process can be determined according to the timer and the maximum transmission times of the TB, and the first timer associated with the first HARQ can be stopped.
  • the sender not only determines to release the first HARQ process based on the timer or the maximum number of transmissions of the TB, and improves the transmission requirements of the TB.
  • the processing unit is specifically configured to: when the number of the first TB transmitted by the first HARQ process is less than the maximum number of transmissions, the first When a timer expires/stops, the first terminal device determines to release the first HARQ process.
  • the timer is used to control the first terminal device to release the first HARQ process, so as to avoid the problem of large time delay caused by transmission of all TBs.
  • the processing unit is specifically configured to: when the number of times the first HARQ process transmits the first TB is equal to or exceeds the maximum number of transmissions , The first terminal device determines to release the first HARQ process.
  • the first terminal device is controlled to release the first HARQ process based on the maximum number of transmissions, so as to prevent the HARQ process from failing when the timer has not expired when all TBs have been transmitted this time, and the HARQ process has not been released.
  • the processing unit is further configured to: notify the second terminal device of the expiration/stop of the first timer, or, The number of the first TB transmitted through the first HARQ process is equal to or exceeds the maximum number of transmissions, or the first HARQ process is released.
  • the first terminal device can notify the second terminal device to time out/stop, or the number of the first TB transmitted through the first HARQ process is equal to or exceeds the maximum number of transmissions, or the first HARQ process is released, so that The second terminal device also releases the second HARQ synchronously, so as to avoid the problem of the HARQ process being locked because the second HARQ process has not been released yet, and the problem of resource waste.
  • a device in a twenty-third aspect, is provided, and the device may be a second terminal device or a chip or a system on a chip in the second terminal device.
  • the device can implement the functions performed by the second terminal device in each of the foregoing aspects or various possible designs, and the functions can be implemented by hardware.
  • the device may include: at least one processor and a transceiver circuit, and related program instructions are executed in the at least one processor, so that the communication device implements the twenty-first aspect or any one of its possible design.
  • the processor transmits the first TB to the second terminal device through the first HARQ process, and the first terminal device determines to release the first HARQ process according to the maximum number of transmissions and/or the first timer.
  • the device may further include a memory, and the memory is used to store necessary computer-executed instructions and data of the device.
  • the processor executes the computer-executable instructions stored in the memory, so that the device executes the method for controlling the HARQ process as described in the eighth aspect or any one of the possible designs of the eighth aspect.
  • a computer-readable storage medium may be a readable non-volatile storage medium, and the computer-readable storage medium stores instructions when it runs on a computer. At the time, the computer is caused to execute the method for controlling the HARQ process described in any one of the twenty-first aspect and the twenty-first aspect of the possible design.
  • a computer program product containing instructions is provided. When it is run on a computer, the computer can execute the control HARQ process described in the twenty-first aspect and any one of the above-mentioned aspects. method.
  • a device in a twenty-sixth aspect, is provided.
  • the device may be a second terminal device or a chip or a system on a chip in the second terminal device.
  • the device includes one or more processors and one or more memories.
  • the one or more memories are coupled with the one or more processors, and the one or more memories are used to store computer program codes, and the computer program codes include computer instructions.
  • the apparatus When the one or more processors, the apparatus is caused to execute the method for controlling the HARQ process of the twenty-first aspect or any possible design of the twenty-first aspect.
  • an embodiment of the present application further provides a communication system, which may include the first terminal device described in any one of the third aspect to the seventh aspect, such as the tenth aspect to the tenth aspect.
  • the second terminal device according to any of the four aspects; or, the second terminal device according to the sixteenth aspect to the twentieth aspect, or the second terminal device according to the twenty-second aspect to the twenty-sixth aspect The first terminal device described in any aspect.
  • FIG. 1 is a schematic diagram of the inconsistent understanding of the timer at the existing transceiver
  • FIG. 2 is a schematic diagram of the architecture of a communication system provided by an embodiment of this application.
  • FIG. 3 is a schematic diagram of the composition of an apparatus provided by an embodiment of the application.
  • FIG. 4 is a schematic flowchart of a HARQ process control provided by an embodiment of this application.
  • FIG. 5 is a schematic flowchart of a HARQ process control provided by an embodiment of this application.
  • FIG. 6 is a schematic flowchart of a HARQ process control provided by an embodiment of this application.
  • FIG. 7 is a schematic flowchart of a HARQ process control provided by an embodiment of this application.
  • FIG. 8 is a schematic diagram of the composition of a communication device 80 provided by an embodiment of this application.
  • FIG. 9 is a schematic diagram of the composition of a communication device 90 provided by an embodiment of the application.
  • FIG. 10 is a schematic diagram of the composition of a communication system provided by an embodiment of this application.
  • HARQ process refers to the process in which the sender schedules a data transmission to the receiver, and then the sender receives the positive acknowledgement ACK/negative acknowledgement NACK.
  • the HARQ operation at the sending end may include newly transmitting and retransmitting the TB, and receiving and processing ACK/NACK; the HARQ operation at the receiving end may include receiving TB, soft combining processing, and generating ACK/NACK.
  • One or more HARQ processes form a HARQ entity.
  • the HARQ entity combines a stop-and-wait protocol while allowing continuous data transmission.
  • Each HARQ process processes a transport block (TB) within a transmission time interval (TTI), and each HARQ process needs an independent HARQ buffer (buffer) at the receiving end, so that the received Data is soft merged.
  • TTI transmission time interval
  • buffer independent HARQ buffer
  • Both the sending end and the receiving end are configured with HARQ processes for transmitting TB.
  • Each HARQ process is configured with a timer. This timer can be used to limit the use time of the HARQ process.
  • the timer associated with the HARQ process is started. Once the timer expires or reaches a preset value, the sender and receiver can transmit other TBs based on the HARQ process. Configure the timer associated with the HARQ process based on the packet delay budget (PDB).
  • PDB packet delay budget
  • the timer on the receiving end UE side is configured by the originating UE, and the originating UE starts the corresponding timer of the originating end, and the receiving end UE starts the timer when receiving the command to configure the timer sent by the TB, and the configured timer
  • the instruction of is sent to the receiving UE when the sending UE transmits the first TB to the receiving UE.
  • the receiving UE misses the command of the sending UE to configure the timer, and the start/restart time of the timer is not aligned between the two parties, it may happen that when the timer on the sending UE side stops, that is, the current TB is no longer sent to the receiving UE. , The timer of the receiving UE is still working, the receiving UE will still think that the sending UE will retransmit the current TB block before the timer expires, the HARQ process in the receiving UE is locked and cannot be used to receive other sending UEs The sidelink transmission sent.
  • Figure 1 is a schematic diagram of the sending UE transmitting TB1 to the receiving UE through HARQ process 1.
  • the receiving UE has not received the TB1 sent by the sending UE in the previous two times, and the receiving UE is in The third retransmission of TB1 receives the timing configuration information and starts the timer.
  • the receiving UE starts the timer later than the sending UE starts the timer.
  • the receiving UE will still consider the sender before the timer expires.
  • the UE will retransmit the current TB block, and HARQ process 1 is locked and cannot be used to receive sidelink transmissions sent by other originating UEs.
  • an embodiment of the present application provides a method for controlling HARQ processes.
  • the sender determines to stop the timer associated with the HARQ process in some cases, it sends indication information to the receiving end, and the receiving end receives After the indication information, the timer associated with the HARQ process can be stopped according to the indication information. Or, the transmitter and receiver stop the timer based on the same trigger condition. In this way, the receiver and receiver have the same understanding of the timer associated with the HARQ process.
  • the sender determines to stop the timer associated with the HARQ process in some cases, it sends indication information to the receiving end, and the receiving end receives After the indication information, the timer associated with the HARQ process can be stopped according to the indication information. Or, the transmitter and receiver stop the timer based on the same trigger condition. In this way, the receiver and receiver have the same understanding of the timer associated with the HARQ process.
  • the method of controlling the HARQ process reference may be made to the description in the embodiment corresponding to FIG. 4
  • the method for controlling the HARQ process provided by the embodiments of the present application can be used in any communication system supporting V2X communication.
  • the communication system may be a third generation partnership project (3GPP) communication system, for example, long-term evolution (long-term evolution) communication system.
  • 3GPP third generation partnership project
  • LTE long-term evolution
  • LTE long-term evolution
  • 5G fifth generation
  • NR new radio
  • V2X vehicle-to-everything
  • the next-generation communication system can also be a non-3GPP communication system without limitation.
  • FIG. 2 uses FIG. 2 as an example to describe the method provided in the embodiment of the present application.
  • FIG. 2 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • the communication system may include multiple terminals and network devices.
  • the terminal may be located within the cell coverage of the network equipment, or may be located outside the cell coverage of the network equipment.
  • the terminal can communicate with network devices through the Uu port, or communicate with other terminals through the sidelink (SL) (or PC5 port).
  • the terminal can communicate one-to-one with other terminals in a unicast mode, and can also perform multicast or broadcast communication with multiple other terminals in a multicast mode or a broadcast mode.
  • the terminal 1 can perform unicast communication with the terminal 2 and send sideline data to the terminal 2 in a unicast manner.
  • the terminal 1 can be a multicast group with three other terminals: the terminal 3, the terminal 4, and the terminal 5, and the terminal 1 can send sideline data to the terminal 3, the terminal 4, and the terminal 5 in a multicast manner.
  • the unicast mode described in this application may refer to: one terminal communicates with another terminal through a one-to-one SL link.
  • the broadcast mode may refer to: one terminal broadcasts a message to its surroundings, and one or more other terminals receive the broadcast message.
  • the multicast mode may refer to one terminal sending data/messages to one or more terminals in the multicast group.
  • the network device in FIG. 2 may be any device with a wireless transceiver function, which is mainly used to implement functions such as wireless physical control, resource scheduling and wireless resource management, wireless access control, and mobility management.
  • the network device may be an access network (AN)/radio access network (RAN) device, or a device composed of multiple 5G-AN/5G-RAN nodes, and It can be a base station (nodeB, NB), an evolved base station (evolution nodeB, eNB), a next-generation base station (generation nodeB, gNB), a transmission receiving point (TRP), a transmission point (TP), a roadside There are no restrictions on the roadside unit (RSU) and any node among some other access nodes.
  • AN access network
  • RAN radio access network
  • a device composed of multiple 5G-AN/5G-RAN nodes and It can be a base station (nodeB, NB), an evolved base station (evolution nodeB, eNB), a next-generation base station
  • the terminal (terminal) in FIG. 2 may be called a terminal device (terminal equipment) or a user equipment (user equipment, UE) or a mobile station (mobile station, MS) or a mobile terminal (mobile terminal, MT), etc.
  • the terminal in FIG. 2 may be a mobile phone, a tablet computer, or a computer with a wireless transceiver function.
  • the terminal can also be a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, and a smart grid.
  • VR virtual reality
  • AR augmented reality
  • Wireless terminals wireless terminals in smart cities, wireless terminals in smart homes, in-vehicle terminals, vehicles with vehicle-to-vehicle (V2V) communication capabilities, and smart connected vehicles Wait, there is no limit.
  • Both the terminal and the network device in the embodiments of the present application may be one or more chips, or may be a system on chip (SOC) or the like. Refer to Figure 3 for specific components of the terminal and network equipment.
  • FIG. 2 is only an exemplary drawing, the number of devices included in FIG. 2 is not limited, and in addition to the devices shown in FIG. 2, the communication architecture may also include other devices.
  • the names of each device in FIG. 2 are not limited.
  • each device can also be named with other names, which are not limited.
  • the terminal can use any of the following modes to obtain transmission resources: Mode 1, resource allocation scheduled by network equipment.
  • This mode can be called mode3 in the LTE-V2X communication system, and it can be called mode1 in the NR-V2X communication system.
  • Mode one can be that when the terminal needs to transmit data to the opposite end on the sidelink, it sends a request to the network device to request resources for sidelink transmission; after receiving the request from the terminal, the network device allocates sidelink transmission resources for the terminal.
  • Mode 2 The terminal independently selects resources.
  • This mode can be called mode4 in the LTE-V2X communication system, and it can be called mode2 in the NR-V2X communication system.
  • Mode 2 can be that the network device allocates a resource pool including a large number of resources to the terminal or the terminal is pre-configured with a large number of resources.
  • Resource pool multiple terminals can select the sidelink transmission resources they need in the resource pool through their own perception of scheduling or competition.
  • the terminal or the originator After the terminal or the originator obtains the sidelink transmission resource through mode 1 or mode 2, it sends data to the opposite end on the obtained sidelink transmission resource, such as: start/restart the timer associated with the HARQ process, that is, unlock HARQ
  • the timer associated with the process during the valid period/run period of the timer associated with the HARQ process, sends a TB to the opposite end through the HARQ process, and the TB multiplexes data on one or more logical channels (logic channels, LCH).
  • the peer starts/restarts the timer associated with the HARQ process.
  • the valid period/runtime of the timer associated with the HARQ process after receiving the TB transmitted on the HARQ process, it processes the received TB, and then The processed ACK/NACK is fed back to the sender.
  • the originating end and the receiving end are relative concepts.
  • the originating end can refer to a terminal or terminal device that sends a TB on a certain HARQ process on the sidelink
  • the receiving end can refer to a certain HARQ on the sidelink.
  • the terminal or terminal device that receives the TB in the process In the following, the method for controlling the HARQ process provided by the embodiment of the present application will be described by taking the originating end as the first terminal device and the receiving end as the second terminal device as an example.
  • FIG. 3 is a schematic diagram of the composition of an apparatus 300 provided by an embodiment of the application.
  • the apparatus 300 may be a terminal or a chip or a system on a chip in the terminal.
  • the device 300 includes a processor 301, a transceiver circuit 302, and a bus 303. Further, the device 300 may also include a memory 304.
  • the processor 301, the memory 304, and the transceiver circuit 302 may be connected through a bus 303.
  • the processor 301 may be a central processing unit (CPU), a general-purpose network processor (NP), or a digital signal processor (digital signal processing). , DSP), microprocessor, microcontroller, programmable logic device (programmable logic device, PLD) application specific integrated circuit (ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or others Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the processor 301 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.
  • the transceiver circuit 302 is used to communicate with other devices or other communication networks.
  • the other communication network may be Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.
  • the transceiver circuit 302 may be a module, a circuit, a transceiver, or any device capable of implementing communication.
  • the transceiver circuit 302 can be used to receive program instructions and transmit them to the processor, or the transceiver circuit 302 can be used in the apparatus 300 to communicate with other communication devices, such as interactive control signaling and/or service data.
  • the transceiver circuit 302 may be a code and/or data read/write transceiver circuit, or the transceiver circuit 302 may be a signal transmission transceiver circuit between the communication processor and the transceiver.
  • the bus 303 is used to transmit information between the components included in the device 300.
  • the memory 304 is used to store instructions. Among them, the instruction may be a computer program.
  • the memory 304 may be a read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and/or instructions, or it may be a random access memory (RAM) or a random access memory (RAM).
  • RAM random access memory
  • RAM random access memory
  • RAM random access memory
  • RAM random access memory
  • RAM random access memory
  • EEPROM electrically erasable programmable read-only memory
  • CD- ROM compact disc read-only memory
  • optical disc storage including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.
  • the memory 304 may exist independently of the processor 301, or may be integrated with the processor 301.
  • the memory 304 may be used to store instructions or program codes or some data.
  • the memory 304 may be located in the device 300 or outside the device 300 without limitation.
  • the processor 301 is configured to execute instructions stored in the memory 304 to implement the HARQ process control method provided in the following embodiments of the present application.
  • the processor 301 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 3.
  • the apparatus 300 further includes an output device 305 and an input device 306.
  • the input device 306 is a device such as a keyboard, a mouse, a microphone, or a joystick
  • the output device 305 is a device such as a display screen and a speaker.
  • the device 300 may further include a power supply circuit 307, which may be used to supply power to the processor 301, and the power supply circuit 307 may be located in the same chip as the processor 301, or, It is located in a chip other than the chip where the processor 301 is located.
  • a power supply circuit 307 which may be used to supply power to the processor 301, and the power supply circuit 307 may be located in the same chip as the processor 301, or, It is located in a chip other than the chip where the processor 301 is located.
  • the power supply circuit 307 described in the embodiment of the present application includes but is not limited to at least one of the following: a power supply line, a power supply subsystem, a power management chip, a power management processor, or a power management control circuit.
  • the device 300 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device with a similar structure in FIG. 3.
  • the composition structure shown in FIG. 3 does not constitute a limitation on the terminal.
  • the terminal may include more or less components than those shown in the figure, or combine certain components, or Different component arrangements.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the above-mentioned apparatus 300 may be a chip system, which may be as shown in FIG. 3, and may include at least one or more processors and transceiver circuits.
  • the program instructions related to the method described in the embodiments of the present application are in this one or It is executed in multiple processors, so that the chip system realizes the method of controlling the HARQ process.
  • the embodiments of the present application do not limit the subject of the execution method.
  • the subject may be a terminal, a functional module in the terminal, or a chip system, etc., which is not limited.
  • the terminal device is used as For example, the method provided in the embodiment of the present application is described.
  • the terminal device described in the following embodiments may include the components shown in FIG. 3.
  • FIG. 4 is a method for controlling the HARQ process provided by an embodiment of the application. The method can solve the above-mentioned technical problems. As shown in FIG. 4, the method may include:
  • Step 401 The first terminal device determines that the TB transmitted through the first HARQ process is the first TB transmitted for the last time or is a newly transmitted TB, or the number of the first TB transmitted through the first HARQ process reaches the maximum number of transmissions, and stops The first timer.
  • the first terminal device can be any terminal in FIG. 2 or a functional module or chip system in any terminal.
  • the first terminal device can perform sidelink communication with the second terminal device, and send to the second terminal device through the first HARQ process.
  • the second terminal device may be any terminal in FIG. 2 that receives the TB transmitted by the first terminal device through the first HARQ process, or a functional module or chip system in any terminal, which is not limited.
  • the first terminal device may be the terminal 1 in FIG. 2 and the second terminal device may be the terminal 2 in FIG. 2.
  • the first HARQ can be any HARQ process in the first terminal device, the first terminal device can transmit the first TB through the first HARQ process, and the first TB can multiplex one or more data on the LCH, that is, one Or the data on multiple LCHs can be carried in the first TB, processed by the first HARQ process, and then transmitted.
  • the first terminal device transmitting the first TB through the first HARQ process may refer to: after the first terminal device generates the first TB, the first terminal device combines the first TB and/or resource information associated with the TB and HARQ The information is submitted to the first HARQ process for processing, and the processed first TB is sent to the second terminal device through the sidelink transmission resource corresponding to the first HARQ process or the TB.
  • HARQ information may include, but is not limited to, HARQ feedback enable/disable, redundancy version, and so on.
  • the process of the HARQ entity processing the TB can refer to the prior art, and will not be described in detail.
  • MAC PDU media access control protocol data unit
  • the first HARQ process may be associated/corresponding to a first timer (timer), and the first timer is maintained by the first terminal device, for example, the first terminal device triggers the start/restart, stop, etc. of the first timer. .
  • the first timer may be used to limit the length of time for the first terminal device to send the first TB through the first HARQ process or the length of time for the first terminal device to send the first TB through the first HARQ process.
  • the total duration of sending the first TB each time can also be used to limit the duration of each transmission of the first TB.
  • the first terminal device may repeatedly send the first TB through the first HARQ process.
  • the first terminal device stops passing the first TB.
  • a HARQ process sends the first TB.
  • the duration of the first timer is configured to be [t1, t2], during the time period [t1, t2] after the first timer is started, the first terminal device may send multiple first HARQ processes through the first HARQ process.
  • the first timer is not limited to being associated with the first HARQ process, and may also be associated/corresponding to one or more other HARQ processes in the first terminal device.
  • the timer 1 may be associated with the HARQ process 1 and the HARQ process 2, and the duration of TB transmission through the HARQ process 1 and the HARQ process 2 may be defined at the same time.
  • the maximum number of transmissions may refer to the preset maximum number of transmissions of the first TB, and the maximum transmission number may also be referred to as the maximum number of transmissions of the first TB or the maximum number of transmissions of the first TB.
  • the maximum number of transmissions can be pre-configured, where the pre-configuration is that the first terminal device is configured when it leaves the factory and can be changed later; or, the maximum number of transmissions can be a fixed value specified by the protocol, such as a fixed value N, N are integers greater than or equal to 1; or, the maximum number of transmissions is configured by the network device to the first terminal device, etc., which is not limited.
  • the first terminal device records the initial value of the number of transmissions of the first TB/the number of transmissions of the first TB as 0, and subsequently, after the first terminal device starts to transmit the first TB to the second terminal device, every time it transmits For the first TB, the number of transmissions of the first TB is increased by 1. It should be understood that the number of transmissions is increased by 1 only after the first terminal device transmits the first TB through the first HARQ process; or, as long as the first terminal device The first TB is sent through the first HARQ process, and whether it is always sent through the first HARQ process is not limited, and the number of times the first TB is sent is increased by one.
  • N is an integer greater than or equal to 1
  • N is an integer greater than or equal to 1
  • the first timer can be stopped. If the number of transmissions of the first TB recorded by the first terminal device is equal to N-1, it is determined that the TB transmitted by the first terminal device through the first HARQ process is the first TB transmitted for the last time, or the first terminal device will perform the last first TB transmission. For one TB transmission, after the first terminal device finishes transmitting the first TB this time, and the multiple first TBs have been transmitted, the first timer can be stopped.
  • the newly transmitted TB may refer to a new TB transmitted through the first HARQ process, and the newly transmitted TB is different from the first TB.
  • the first TB can be called the old TB or the current TB, without limitation.
  • the new transmission instruction may be used to instruct the first terminal device to send the second TB to the second terminal device, Or, determine to transmit the second TB through the first HARQ process according to the new transmission instruction, or determine to perform the new transmission through the first HARQ process according to the new transmission instruction, or associate the first HARQ process with the second resource according to the new transmission instruction, and the second
  • the resource may be different from the corresponding resource for transmitting the first TB.
  • the second resource may be a sidelink resource for transmitting the second TB, or the first terminal device/the higher layer of the first terminal device (such as radio resource control).
  • RRC radio control, RRC
  • the first terminal device may stop the first timer.
  • stopping the first timer by the first terminal device may mean that the first terminal device stops the maintenance of the first terminal device/the first timer configured in the first terminal device, or stops the first timer configured for the first HARQ process.
  • stopping the first timer may mean that the first timer becomes invalid, the transmission of the first TB through the first HARQ process is stopped, or the first TB is no longer transmitted through the first HARQ process.
  • the first terminal device may determine that the TB transmitted through the first HARQ process is the first TB transmitted in the last time or the newly transmitted TB, or the first TB transmitted through the first HARQ process.
  • the first timer is stopped, which is not limited.
  • the first terminal device may start a second timer, which is associated with the first HARQ process and is used to limit the duration of repeated transmission of the second TB through the first HARQ process.
  • the second HARQ timer may be the same as or different from the first HARQ timer.
  • the first terminal device may reconfigure the first timer according to the scheduling information corresponding to the newly transmitted TB, and restart the first timer, that is, the first timer starts to run according to the timer duration corresponding to the newly transmitted TB.
  • Step 402 The first terminal device sends the first indication information to the second terminal device.
  • the first indication information may be used to indicate the TB transmitted through the first HARQ process.
  • TB is the first TB transmitted in the last time.
  • the first indication information may also be used to instruct the first terminal device to release the first HARQ process, or to instruct the second terminal device to release the process associated with the first HARQ process, such as: the first HARQ process associated The second HARQ process, or, is used to instruct the second terminal device to release the HARQ process associated with the first TB.
  • the first indication information may be used to indicate that the TB transmitted through the first HARQ process is a newly transmitted TB.
  • the first terminal device may carry the first indication information in the sidelink control information (SCI) and send it
  • the SCI may be referred to as sidelink feedback control information (SFCI).
  • the SCI may schedule the TB transmitted through the first HARQ, and the SCI may be used to indicate the time and frequency of transmission of the TB Resource location.
  • the first indication information may be used to indicate the transmission through the first HARQ process The number of the first TB reaches the maximum number of transmissions.
  • the first terminal device may send the first indication information in the SCI or other control information to the second terminal before or after sending the first TB to the second terminal device for the last time through the first HARQ process.
  • the first indication information may be carried in the first SCI or the second SCI, and the first SCI and the second SCI contain different information and/or different formats.
  • the first SCI may be used to schedule the first TB to be sent for the last time, the first SCI is sent before the first TB is sent, and the second SCI may be sent after the first SCI is sent or the first TB is sent for the last time.
  • the first terminal device before sending the first TB, sends the first SCI to the second terminal device, and the first SCI carries the first indication information; or, optionally, the first terminal device sends the first SCI to the second terminal device.
  • the device After sending the first SCI, the device sends the second SCI, and the second SCI carries the first indication information.
  • the first indication information may be a one-bit field in the first SCI, and the value of the bit field may be the number of binary bits "0". Or “1", 0" indicates that the maximum number of transmissions has not been reached, and "1" indicates that the maximum number of transmissions has been reached.
  • the value of this field in the first SCI for scheduling the first TB is "0"; when the first terminal device determines that the first TB is transmitted for the Nth time and reaches the maximum number of transmissions, the value in the first SCI is The value of the field is "1".
  • the SCI may carry the maximum number of transmissions of the first TB and/or be used to indicate which SCI is scheduled for this time.
  • One terabyte of instruction information For example, suppose that the first terminal device needs to send the first TB to the second terminal device, and the maximum number of transmissions of the first TB is N.
  • the first terminal device initially transmits the first TB, the first TB corresponding to the first TB is initially transmitted.
  • the SCI indicates the maximum number of transmissions N and the number of bits "1", and the number of bits "1" indicates whether it is the first transmission or the first transmission; subsequently, the first terminal device retransmits the first TB for the first time, that is, the second When the first TB is transmitted, "2" is indicated in the retransmission SCI, indicating that this is the first retransmission/second transmission of the first TB.
  • the solution of indicating the maximum number of transmissions and/or the number of transmissions of the first TB described in this exemplary solution may not rely on the maintenance timers of the first terminal device and the second terminal device shown in FIG. 4.
  • An application scenario, that is, the first TB indicating the maximum number of transmissions and/or the number of transmissions through the SCI can be implemented as a parallel solution with the solution of maintaining the timer shown in FIG. 4 and executed separately.
  • Step 403 The second terminal device receives the first indication information, and stops the second timer according to the first indication information.
  • the second timer is a timer maintained by the second terminal device, and the second timer can be used to limit the length of time the second terminal device receives the first TB through the second HARQ process or the second terminal device uses the second HARQ process to receive
  • the duration of the first TB which may be the total duration of multiple transmissions of the first TB through the first HARQ process, and may also be used to limit the duration of receiving the first TB each time.
  • the second terminal device can receive and process the first TB through the second HARQ process, optionally, and/or feed back the ACK/NACK corresponding to the first TB, and the second timer expires/ Stop, the second terminal device stops receiving the first TB through the second HARQ process.
  • the terminal device associates/corresponds to the second HARQ process with the first HARQ, or the second HARQ process is related to the first TB, and the second HARQ process is used to receive the first TB.
  • the identifier (ID) of the second HARQ process may be the same as or different from the ID of the first HARQ process, and is not limited. In the embodiment of the present application, the ID of the HARQ process may uniquely identify a HARQ, and the ID of the HAQR process may also be referred to as the HARQ process number.
  • the second terminal device may receive the SCI from the first terminal device, and the SCI may be used to schedule the first TB sent by the first terminal device to the second terminal device.
  • the SCI includes the first HARQ
  • the second terminal device determines that the first terminal device will send the first TB to the second terminal device through the first HARQ process, and the second terminal device will send the first TB to the second terminal device.
  • the second terminal device may save the association relationship between the second HARQ process and the first HARQ process, and subsequently, once the second terminal device determines that the first terminal device sends the first TB to the second terminal device through the first HARQ process, the first The two terminal devices receive the first TB through the second HARQ process according to the association relationship.
  • the second terminal device may determine that the first terminal device passes the first terminal device according to the SCI of the first TB used to schedule this transmission.
  • the HARQ process sends the first TB to the second terminal device.
  • the first terminal device sends the SCI corresponding to TB1 to the second terminal device, and then sends TB1 to the second terminal device; then, the first terminal device sends the SCI corresponding to TB2 to the second terminal device, and then to the second terminal device The device sends TB2. If the second terminal device determines that the HARQ process identifier indicated in the SCI corresponding to TB2 is the same as the HARQ process identifier indicated in the SCI corresponding to TB1, and the new data indicator (NDI) is not overturned, it is considered TB1 is the same as TB2, that is, both are the first TB.
  • NDI new data indicator
  • stopping the second timer by the second terminal device according to the first indication information may include: according to the first indication information, the second terminal device determines that the second terminal device receives the data from the second HARQ process associated with the first HARQ process.
  • the TB is the first TB transmitted last time or is a newly transmitted TB, or the number of the first TB received through the second HARQ process reaches the maximum number of transmissions, and the second timer is stopped; or the second terminal device successfully decodes the first TB One TB, stop the second timer; or, the second terminal device generates the HARQ feedback (ACK or NACK) of the first TB and stops the second timer, or the second terminal device instructs the HARQ feedback (ACK or NACK) of the first TB NACK), stop the second timer.
  • stopping the second timer by the second terminal device may mean that the second terminal device stops the maintenance of the second terminal device/the second timer configured in the second terminal device, and stopping the second timer may mean that the second timer expires, stop The first TB is received through a second HARQ process associated with the first HARQ process, or the first TB is received through a second HARQ process associated with the first HARQ process no longer.
  • the first terminal device may also directly notify the second terminal device to stop the second timer associated with the second HARQ process after stopping the first timer, so that the second terminal device directly Stopping the second timer associated with the second HARQ process according to the notification of the first terminal device, and it is not necessary to determine according to the first indication information that the TB received through the second HARQ process satisfies certain conditions (for example, the received TB is the first transmission of the last transmission).
  • the second timer is stopped.
  • the first terminal device stops the first timer associated with the first HARQ process, and through the first indication information, will pass
  • the first HARQ process notifies the second terminal device of the TB sent by the first HARQ process, so that the second terminal device learns the status of the first terminal device sending the TB according to the indication of the first indication information, and stops the second terminal device according to the status of the first terminal device sending the TB.
  • the second timer in the terminal device when the TB sent by the first terminal device through the first HARQ process meets certain conditions, the first terminal device stops the first timer associated with the first HARQ process, and through the first indication information, will pass
  • the first HARQ process notifies the second terminal device of the TB sent by the first HARQ process, so that the second terminal device learns the status of the first terminal device sending the TB according to the indication of the first indication information, and stops the second terminal device according to the status of the first terminal device sending the TB.
  • the second timer in the terminal device when the TB sent by the
  • the sending and receiving ends stop the timers associated with the HARQ process maintained by each based on the same trigger event, and the behaviors of the sending and receiving ends to stop the timers associated with the HARQ process maintained by the sending and receiving ends are aligned to avoid conflicts between the sending and receiving ends.
  • the understanding of the stop time of the timer associated with the HARQ process maintained by each is inconsistent, causing the HARQ of the receiving end to be locked and cannot be used to transmit other TBs, and the problem of resource waste.
  • the first terminal device and the second terminal device may also stop their respective maintenance timers according to the number of failures during TB transmission.
  • the method can be referred to as shown in Figure 5:
  • FIG. 5 is another method for controlling the HARQ process provided by an embodiment of the application.
  • the method can solve the above technical problem. As shown in FIG. 5, the method may include:
  • Step 501 The first terminal device sends the first TB to the second terminal device through the first HARQ process.
  • Step 502 The second terminal device receives the first TB, processes the first TB, and optionally, feeds back the ACK/NACK of the first TB to the first terminal device.
  • Step 503 Optionally, the first terminal device receives the ACK/NACK corresponding to the first TB.
  • the first terminal device Before the number of transmissions of the first TB reaches the maximum number of transmissions, the first terminal device optionally repeats step 501 and step 503 until step 504, and the first terminal device repeats step 502 until step 505.
  • Step 504 Optionally, the first terminal device determines that the number of times of receiving NACK is equal to or more than M times, and stops the first timer.
  • M is an integer greater than or equal to 1, and NACK may be used to indicate that the second terminal device has not correctly received the first TB transmitted through the first HARQ process.
  • M may be configured by the first terminal device, and configured/notified by the first terminal device to the second terminal device.
  • the number of NACKs is equal to or more than M, it means that the number of failures to transmit the first TB through the first HARQ process is too many, and it may not be appropriate to transmit the first TB through the first HARQ process, so stop the first HARQ process association/correlation. The corresponding first timer.
  • Step 505 Optionally, the second terminal device determines that the number of feedback NACKs exceeds M times, and stops the second timer.
  • the first terminal device can stop the first timer when the number of NACKs corresponding to the first TB reaches a certain value, and the second terminal device can stop when the number of NACKs corresponding to the first TB reaches a certain value.
  • the second timer In this way, both ends of the transceiver are made based on the timers associated with the HARQ process maintained by the number of NACKs, aligning the behavior of the transceivers to stop the timers associated with the HARQ processes maintained by each, avoiding the difference between the transceivers and the HARQ processes maintained by the transceivers.
  • the inconsistent understanding of the stop time of the timers associated with the process results in the HARQ of the receiving end being locked and unable to be used to transmit other TBs, which is a waste of resources.
  • steps 401 to 403 or steps 501 to 505 describe the behavior of the first terminal device stopping the first timer associated with the first HARQ process and the second terminal device stopping the second timer associated with the second HARQ process.
  • the embodiment of the present application also relates to other behaviors of the first terminal device maintaining the first timer, such as: stopping the first timer, configuring the first timer, starting/restarting the first timer, and the first terminal The behavior of the device during the running of the first timer. Specifically, these behaviors can be referred to the following first to fourth embodiments:
  • the first implementation manner relates to the behavior of the first terminal device after stopping the first timer:
  • the first terminal device may also perform the following process: the first terminal device releases the first HARQ process, and/or, the first terminal device sends to the network device Release notice.
  • an event when an event occurs, it can mean at the same time that the event occurs, or after the event occurs, for example, at a certain time preset point after the event occurs, No restrictions.
  • the first timer when the first timer expires, it may include: at the same time when the first timer expires, or after the first timer expires, or at a certain time point after the first timer expires, there is no restriction.
  • the new transmission instruction is received as described in this application, it may include when the new transmission instruction is received, or after the new transmission instruction is received, there is no restriction.
  • the release notification can be used to notify the network device to release the first HARQ or to notify the network device to release the sidelink transmission resources used to transmit the first TB, or to notify the network device that the first HARQ process is available, and the first TB can be passed TB transmitted by the first HARQ process.
  • the first terminal device sending the release notification to the network device can be executed in the first mode or in the second mode, and is not limited.
  • the first terminal device may trigger connection establishment or link re-establishment to send the release notification to the network device.
  • the release of the first HARQ process by the first terminal device can also be referred to as the first terminal device unlocking the first HARQ process, stopping transmitting the first TB through the first HARQ, putting the first HARQ process in an idle state or allowing the first HARQ process to pass Transfer other TB. It should be noted that the release of the first HARQ process by the first terminal device can be performed in the foregoing mode 1 or mode 2 scenarios, and is not limited.
  • the first terminal device may also clear the buffer associated with the first HARQ process in the first terminal device, or cover the buffer associated with the first HARQ process with new data or TB or MAC PDU.
  • the behavior described in the first embodiment is also applicable to the scenario where the first timer expires, that is, after the first timer expires, the first terminal device may release the first timer as described in the first embodiment.
  • the HARQ process, and/or, sends a release notification to the network device.
  • the first terminal device can release the sidelink transmission resources corresponding to the first TB transmitted through the first HARQ process in time after stopping the first timer, so as to avoid resource waste.
  • the second embodiment relates to how to configure the first timer associated with the first HARQ.
  • the first timer associated with the first HARQ in the first terminal device and the related parameters of the first timer may be configured in the following manner (1.1) or manner (1.2), and the related parameters of the first timer may be at least Including the duration of the first timer, and may also include events that trigger the start/restart of the first timer, events that trigger the stop of the first timer, etc.:
  • the first terminal device configures the first timer and the duration of the first timer.
  • the duration of the first timer may be determined according to the number of times the first TB is transmitted through the first HARQ process, or may be determined according to the relevant parameters of the LCH multiplexed by the first TB.
  • pre-configuration or network equipment configures the first parameter for each LCH, for example, who is the first parameter of the network through dedicated signaling or system message
  • the terminal device configures the LCH or RB
  • the first parameter used to determine the length of the first timer is provided in the configuration, that is, the first parameter is used to indicate the length of the timer associated with the LCH, where the LCH can also be replaced by a radio bearer ( radio bearer, RB).
  • the first TB can multiplex one or more logical channel LCH data, and the duration of the first timer can be equal to the first parameter corresponding to the LCH with the highest priority among the one or more LCHs, or the duration of the first timer Equal to the first parameter with the smallest value among the first parameters corresponding to one or more LCHs.
  • the first parameter corresponding to the LCH may be the duration of a timer associated with the LCH, and the configuration of the first parameter corresponding to the LCH is a pre-configured parameter or is configured by a network device.
  • the first parameter corresponding to the LCH may be pre-configured to the first terminal device by the network device through RRC signaling when the network device establishes a radio resource control (RRC) connection with the first terminal device, or it may be configured in the network
  • RRC radio resource control
  • the network device uses dynamic signaling or physical layer signaling to configure or provide system information (such as system information blocks (SIBs)) to the first terminal device without limitation.
  • SIBs system information blocks
  • the first timer and the duration of the first timer are pre-configured parameters or configured by network equipment.
  • the network device may determine the duration of the first timer according to the maximum number of transmissions of the first TB.
  • the network device can pre-configure the first timer and the duration of the first timer to the first terminal device through RRC signaling, or the network device and the first terminal device After the RRC connection is established, the network device configures it to the first terminal device through dynamic signaling or physical layer signaling or system information, which is not limited.
  • the first timer can be configured by the first terminal device, and the first timer in the first terminal device can also be configured by the network device.
  • the third embodiment relates to the conditions under which the first terminal device starts/restarts the first timer.
  • the first terminal device may start/restart the first timer when triggered by any one of the following events 1 to 4:
  • Event 1 The first terminal device receives the new transmission instruction and starts or restarts the first timer.
  • the new transmission instruction may be used to instruct the first terminal device to newly transmit the first TB through the first HARQ process, or the new transmission instruction may be used to instruct the first terminal device to transmit the first first TB through the first HARQ process
  • the new transmission indication may be used to instruct the first terminal device to start transmitting the first TB through the first HARQ process.
  • the new transmission instruction may be carried in DCI or a media access control control unit (media access control, MAC CE).
  • the network device may carry the new transmission instruction in the DCI and send it to the first terminal device, or after the MAC of the first terminal device generates the first TB, it will indicate the transmission of the first TB of the physical layer as a new transmission.
  • starting the first timer can also be described as restarting the first timer, and starting the first timer can mean: enabling the first timer to start working, starting from 0, until the first timer is forced Stop or the timing duration of the first timer reaches the duration of the first timer, that is, the first timer expires, stop timing; or until restarted.
  • Event two the first terminal device receives the NACK sent by the second terminal device, and starts or restarts the first timer.
  • NACK is used to indicate that the second terminal device did not correctly receive the first TB or the second terminal device did not successfully decode the first TB. It should be noted that, in this embodiment of the present application, that the second terminal device does not correctly receive the first TB may mean that the second terminal device fails to decode or receives the first TB.
  • the NACK in the second event may be the first NACK sent by the second terminal device, or it may be the Xth NACK, and X is an integer greater than or equal to 2, which is not limited.
  • the second event can also be replaced by the first terminal device not receiving the ACK fed back by the second terminal device, and then starting or restarting the first timer.
  • Event 3 The first terminal device determines to retransmit the first TB to the second terminal device through the first HARQ process, and starts or restarts the first timer.
  • event three can be replaced by the first terminal device starting or restarting the first timer after instructing the second HARQ process to trigger the retransmission; or the first terminal device starting or restarting after obtaining the MAC PDU from the encapsulation and multiplexing entity A first timer; or, the first terminal device receives the retransmission resource scheduled by the network device, and starts or restarts the first timer;
  • the first terminal device determines to retransmit the first TB, or, under the mechanism of only feeding back the ACK, if the first terminal device does not receive the feedback from the second terminal device ACK, it is determined to retransmit the first TB.
  • Event 4 The first terminal device receives the restart instruction from the network device, and starts the first timer according to the restart instruction.
  • the restart instruction may be used to instruct to restart the first timer.
  • the network device may send a restart instruction to the first terminal device when allocating the sidelink resource to the first terminal device after receiving the sidelink resource for requesting transmission of the first TB sent by the first terminal device.
  • Event 5 The first terminal sends an ACK or NACK feedback to the network device, and starts or restarts the first timer.
  • the ACK or NACK corresponds to the ACK or NACK received by the first terminal device from the second terminal device, or corresponding feedback in the case where the NACK or ACK fed back by the second terminal device is not received. For example, when the second terminal device only needs to feed back NACK, if the first terminal device does not receive the NACK fed back by the second terminal device, it will feed back the ACK to the network device.
  • event five may be replaced by the first terminal generating an ACK or NACK feedback sent to the network device, and starting or restarting the first timer.
  • the first terminal device receives the NACK fed back by the second terminal device, it determines that the first TB needs to be retransmitted, and feeds back the NACK to the network device to request retransmission resources, or, under the mechanism of only feeding back the ACK, If the first terminal device does not receive the ACK fed back by the second terminal device, it is determined that the first TB needs to be retransmitted, and NACK is fed back to the network device to request retransmission resources.
  • the fourth embodiment relates to the behavior of the first terminal device during the running of the first timer. Specifically:
  • the second terminal device does not correctly receive the first TB and/or the resources used to transmit the first TB are less than the preset threshold, and/ Or, there are no reserved resources, and/or, on the premise that repetition is configured, and there are no remaining (that is, no available) repetitive resources, the first terminal device acquires the resources for transmitting the first TB; or,
  • the resource for transmitting the first TB is less than the preset threshold, and the first terminal device acquires a new resource for transmitting the first TB.
  • the resource used to transmit the first TB may refer to the sidelink resource used to transmit the first TB or the sidelink transmission resource of the first TB.
  • the preset threshold can be set as required, and is not limited. If the resources of the first TB used for transmission are less than the preset threshold, it means that the available sidelink resources are not enough to transmit all the first TB, and more sidelink resources are needed to transmit the first TB; on the contrary, if it is used to transmit the first TB If the resource is greater than or equal to the preset threshold, it means that there is a sidelink resource capable of transmitting all the first TB.
  • the first terminal device may adopt the above-mentioned mode 1 or mode 2 to acquire the resource for transmitting the first TB or the sidelink resource for transmitting the first TB.
  • acquiring the new resource for transmitting the first TB by the first terminal device may include: the first terminal device acquires the resource for transmitting the first TB from the network device; or, the first terminal device autonomously selects the resource for transmitting the first TB.
  • One terabyte of resources One terabyte of resources.
  • the first terminal device judges whether it needs to acquire resources for transmitting the first TB according to the foregoing conditions, that is, whether it needs to reserve resources or whether it needs to request resources from the base station;
  • the first terminal device can determine when it is received from the second terminal device When the transmitted HARQ feedback is NACK, it is judged according to the above conditions whether it is necessary to obtain resources for transmitting the first TB, that is, whether it is necessary to reserve resources or whether it is necessary to request resources from the base station.
  • the first terminal device may request a new one during the timer operation period and/or when the number of transmissions of the first TB does not reach the maximum number of transmissions, but the resources for transmitting the first TB are insufficient. Used to transmit the sidelink resources of the first TB, or trigger resource reselection, select resources from the pre-configured or configured resource pool of the network device to ensure the normal transmission of the first TB.
  • the buffer associated with the first HARQ process, or the buffer associated with the first HARQ process is covered with the second TB.
  • the ACK is used to indicate that the second terminal device correctly receives the first TB transmitted by the first terminal device through the first HARQ process.
  • the new transmission indication is used to instruct the first terminal device to transmit a new TB through the first HARQ process.
  • the first terminal device After clearing the buffer associated with the first HARQ process, the first terminal device sends the second TB through the first HARQ process and stores the second TB in the buffer associated with the first HARQ to facilitate subsequent retransmission of the second TB.
  • the embodiment of the present application also relates to the behavior of the second terminal device maintaining the second timer, such as: configuring the second timer, starting /Restart the second timer, the behavior of the second terminal device during the running of the second timer, and the behavior after the second timer is stopped.
  • these behaviors can be referred to in the following fifth embodiment to sixth embodiment mode:
  • the fifth embodiment relates to how to configure the second timer associated with the second HARQ.
  • the second timer in the second terminal device and the related parameters of the second timer can be configured through the method (2.1) or the method (2.2), and the related parameters of the second timer may at least include the duration of the second timer , Can also include events that trigger the start/restart of the second timer, events that trigger the stop of the second timer, etc.:
  • the first terminal device configures the second timer for the second terminal device.
  • the first terminal device may configure a second timer for the second terminal device according to parameters such as the duration of the first timer. Specifically, the first terminal device may configure the first timer and the duration of the first timer to the second terminal device through the SCI. For example, the first terminal device may carry the indication information for instructing the second terminal device to configure the second timer and related parameters of the first timer in the SCI and send it to the second terminal device.
  • the first terminal is installed in the SCI for each transmission of the first TB, indicating the duration configuration of the second timer, and the duration of the timer indicated in the SCI each time may be the same or different, that is, the second timing indicated in the SCI
  • the duration of the device is the remaining time of transmitting the first TB, or the remaining running time of the first timer.
  • the first terminal device transmits the first timer associated with the first HARQ process corresponding to the first TB with a duration of 10ms, when the first terminal device is about to transmit the first TB for the Qth time, and Q is an integer greater than or equal to 1.
  • the first timer has been running for 5 ms, that is, the remaining running time is 5 ms, then the first terminal device sets the duration parameter for configuring the second timer to 5 ms in the Q-th transmission of the SCI of the first TB. After receiving the SCI, the second terminal device resets the duration of the second timer to 5 ms and restarts the second timer.
  • the method for determining the duration of the first timer can refer to the above method (1.1), which will not be repeated.
  • the duration of the second timer may be the same as or different from the duration of the first timer, and is not limited.
  • Manner (2.2), the second timer, and the duration of the second timer are pre-configured parameters or configured by network equipment.
  • the network device can determine the duration of the second timer according to the maximum number of transmissions of the first TB.
  • the first terminal device and the second terminal device are in the coverage area of the network equipment.
  • the network device can establish an RRC connection with the second terminal device
  • the network device pre-configures the second timer and the duration of the second timer to the second terminal device through RRC signaling, or it can establish an RRC connection with the second terminal device.
  • the network device sends dynamic signaling or physical layer signaling configuration or system information to the second terminal device without restriction.
  • the second terminal device configures the second timer and the duration of the second timer.
  • the second terminal device may determine the duration of the second timer according to the maximum number of transmissions of the first TB, and may also determine the duration of the second timer according to the relevant parameters of the QoS (for example, PDB) multiplexed by the first TB. limit.
  • the determination method can refer to the above method (1.1).
  • the first terminal device can configure the second timer and notify the second terminal device of the duration of the second timer, or the network device can configure the second timer in the second terminal device centrally.
  • the duration or other related parameters of the second timer in the first terminal device and the second terminal device are the same, so as to ensure the consistency of understanding of the second timer by the first terminal device and the second terminal device.
  • the sixth embodiment relates to the conditions under which the second terminal device starts/restarts the second timer.
  • the second terminal device may start/restart the second timer under the trigger of the following event 5 or event 6:
  • Event 5 The second terminal device receives the configuration information, reconfigures according to the configuration information, and/or starts or restarts the second timer.
  • the configuration information may be used to instruct the second terminal device to start the second timer corresponding to the second HARQ process associated with the first HARQ process, or to indicate that the first terminal device has started the first timing associated with the first HARQ process
  • the device or, is used to instruct the first terminal device to start transmitting the first TB to the second terminal device through the first HARQ process, or to instruct to configure or reconfigure the second timer.
  • the configuration information may be sent by the first terminal device to the second terminal device after the first terminal device starts the first timer according to any one of the above-mentioned event 1 to event 3.
  • event five can be replaced by: the second receiving terminal receives the new transmission instruction sent by the first receiving terminal, starts or restarts, and/or reconfigures the timer;
  • NACK non-acknowledgement feedback
  • send non-acknowledgement feedback (such as NACK) corresponding to the first TB, start or restart and/or reconfiguration timer;
  • Event 6 The second terminal device receives the restart instruction from the network device, and starts the second timer according to the restart instruction.
  • the restart instruction is as described in the above event four. It should be noted that, in this embodiment of the present application, the network device may simultaneously send a restart instruction to the first terminal device and the second terminal device.
  • the second terminal device can be notified to start/restart the second timer, or the network device can collectively notify the first terminal device and the second terminal The device starts/restarts the second timer, so that the first terminal device and the second terminal device align the time for starting/restarting the second timer.
  • the seventh embodiment relates to the behavior of the second terminal device during the operation of the second timer. Specifically:
  • the second terminal device feeds back the feedback information corresponding to the first TB to the first terminal device, where the feedback information includes ACK or NACK; that is, the second terminal device sends/or instructs or generates Before the feedback information corresponding to the first TB, it is necessary to determine whether the second timer is running. If so, perform the operation and send/or instruct or generate the feedback information corresponding to the first TB; otherwise, no generation/no instruction/no Send feedback information corresponding to the first TB. or,
  • the second terminal device merges the TBs in the buffer associated with the second HARQ process, that is, when the second terminal device sends/or instructs or generates feedback information corresponding to the first TB, it needs to determine Whether the second timer is running, if so, perform the operation, combine the TBs in the buffer associated with the second HARQ process, send/or indicate or generate feedback information corresponding to the first TB, otherwise, do not generate /Do not indicate/Do not send the feedback information corresponding to the first TB.
  • the second terminal device may normally feed back the ACK/NACK corresponding to the first TB during the running of the second timer, or perform merging processing on the first TB in the buffer associated with the second HARQ process, In order to improve the transmission reliability of the first TB.
  • the eighth embodiment relates to the behavior of the second terminal device after the second terminal device stops the second timer. Specifically, it includes: the second terminal device clears the buffer associated with the second HARQ process, or covers the buffer associated with the second HARQ process with new data or TB, and stops receiving the first TB through the second HARQ process/releases the second HARQ process.
  • the second terminal device may receive other TBs, such as the second TB, through the second HARQ process.
  • the second terminal device clearing the buffer associated with the second HARQ process may refer to: the second terminal device deletes/clears the TB in the buffer associated with the second HARQ process from the buffer during the running of the second timer.
  • the second terminal device clearing the buffer associated with the second HARQ process can also be replaced by the second terminal device covering the buffer associated with the second HARQ process, for example: after the second timer expires, the second terminal device does not clear the buffer associated with the second HARQ process buffer, but when the second terminal device receives another new TB through the first HARQ process again, such as: the second TB, the received second TB is used to overwrite/replace/update the buffer associated with the second HARQ process TB.
  • the second terminal device clears the buffer associated with the second HARQ process in time, and releases the storage space associated with the second HARQ process, so as to improve the utilization of the storage space.
  • the ninth embodiment relates to how the first terminal device and the second terminal device align the number of transmissions of the first TB. Specifically: the first terminal device indicates to the second terminal device in the SCI how many times the transmission of the first TB corresponding to the SCI is to transmit the first TB, and optionally, the maximum transmission of the first TB is included in the SCI frequency.
  • the SCI can be replaced with other signaling, such as a PC5 RRC message.
  • the first terminal device transmits the first TB at the first transmission.
  • the corresponding SCI (or the SCI used to schedule the first TB of the first transmission) indicates the maximum number of transmissions N and indicates whether it is the first transmission or the first transmission; subsequently, the first terminal device retransmits the first TB for the first time At the time, indicate "2" in the retransmission SCI, which means that this is the first retransmission/second transmission of the first TB.
  • the embodiment of the present application is not limited to clearing the buffer associated with the second HARQ process and releasing the second HARQ process after the second timer expires, and it can also be successfully decoded on the second terminal device.
  • the first TB receives an indication of a newly transmitted TB, it clears the buffer associated with the second HARQ process and releases the second HARQ process.
  • the process is shown in Figure 6.
  • another method for controlling the HARQ process may include:
  • Step 601 The second terminal device successfully decodes the first TB transmitted by the first terminal device through the first HARQ process, or sends an ACK corresponding to the first TB to the first terminal device, or generates an ACK to the first terminal device , Or, to confirm that the decoding is successful, or, on the premise that only NACK is required to feed back ACK, or to receive a new transmission instruction from the first terminal device, or to receive a message for the first TB from the first terminal device.
  • the corresponding new transmission indication of the HARQ process or, if the distance between the second terminal device and the first terminal device is greater than the preset distance, the second terminal device clears the buffer associated with the second HARQ process.
  • the preset distance can be set as needed. When the distance between the second terminal device and the first terminal device is greater than the preset distance, it means that the second terminal device is far away from the first terminal device, and the two may disconnect the communication. Or, due to the long distance, TB cannot be successfully transmitted or HARQ feedback is not supported/not required.
  • the second terminal clearing the buffer associated with the second HARQ process may refer to: the second terminal device deletes/clears the TB in the buffer associated with the second HARQ process from the buffer during the running of the second timer. .
  • the second terminal device clearing the buffer associated with the second HARQ process can also be replaced by the second terminal device covering the buffer associated with the second HARQ process, for example: after the second timer expires, the second terminal device does not clear the buffer associated with the second HARQ process buffer, but when the second terminal device receives another new TB through the first HARQ process again, such as: the second TB, the received second TB is used to overwrite/replace/update the buffer associated with the second HARQ process TB.
  • Step 602 The second terminal device stops receiving the first TB through the second HARQ process.
  • the second terminal device stops receiving the first TB through the first HARQ process can also be called the second terminal device unlocks or releases the first HARQ process, so that the first HARQ process is in an idle state or receives a new TB through the first HARQ process .
  • the second terminal device receives the second TB through the first HARQ process.
  • the second terminal device is not limited to clear the buffer of the second HARQ process, and the second terminal device stops receiving the first TB through the second HARQ process, and the second terminal device may first perform the clearing of the second HARQ process.
  • the HARQ process buffer and then stop receiving the first TB through the second HARQ process, or you can stop receiving the first TB through the second HARQ process, and then clear the buffer associated with the second HARQ process, and you can also clear the second HARQ process at the same time. buffer, stop receiving the first TB through the second HARQ process, there is no restriction.
  • the second terminal device can successfully decode the first TB received by the second terminal device through the second HARQ process, or send the ACK corresponding to the first TB to the first terminal device, or generate If the ACK sent by the first terminal device or the new transmission instruction from the first terminal device is received, or the distance between the second terminal device and the first terminal device is greater than the preset distance, the second HARQ process is cleared
  • the associated buffer uses the buffer associated with the second HARQ process to store other new TBs. In this way, the buffer associated with the HARQ process that successfully transmits TB or is not conducive to TB transmission can be cleaned up in time, and the storage capacity of the second terminal device can be improved.
  • the second HARQ process maintained by the second terminal device may be correspondingly configured with a second timer.
  • the related description of the second timer is as described above, and the second terminal device maintains the second HARQ process.
  • the behavior of the second timer such as restarting/starting the second timer, the behavior during the operation of the second timer, and the behavior after the second timer expires can be referred to the above, and will not be repeated.
  • the existing method of stopping the timer based on the timer or the maximum number of transmissions cannot meet the quality of service (QoS) requirements of TB transmission, for example, cannot meet the reliability requirements of TB.
  • QoS quality of service
  • the originating UE needs to reserve sidelink resources for repeated transmission of TB1. After the first reserved sidelink resources are used up, it needs to reserve the second sidelink resources again. If the interval between the two reservations is longer Long, exceeding the delay requirement of the TB, affecting the transmission delay of the TB, and failing to meet the QoS requirements of the TB transmission.
  • the sidelink resources allocated by the network device for the originating UE to transmit TB are sufficient, and the number of TB transmissions on the HARQ process has reached the maximum number of transmissions.
  • the HARQ process will continue to be locked. Until the timer expires, if the transmission of TB is stopped on the HARQ process associated with the timer, because the HARQ process is in a suspended state for a long time, it cannot be used to transmit other new TBs, resulting in a waste of resources.
  • the embodiment of the present application also provides a method for controlling the HARQ process. As shown in FIG. 7, another method for controlling the HARQ process provided by the embodiment of the present application , The method can include:
  • Step 701 The first terminal device transmits the first TB to the second terminal device through the first HARQ process.
  • step 401 For the related description of the first HARQ process, reference may be made to the description in step 401, which will not be repeated.
  • transmitting the first TB to the second terminal device by the first terminal device through the first HARQ process may include: after the first terminal device generates/acquires data of multiple LCHs, multiplexes the data of multiple LCHs into the first terminal device.
  • the first HARQ process is used to process the first TB, and the processed first TB is sent to the second terminal device through the sidelink resource.
  • Step 702 The first terminal device determines to release the first HARQ process according to the maximum number of transmissions and/or the first timer.
  • the first timer is associated with the first HARQ process.
  • the maximum number of transmissions and the first timer refer to the description in step 401, which will not be repeated.
  • the first terminal device determines to release the first HARQ process according to the maximum number of transmissions and the first timer, which may include: when the number of the first TB transmitted by the first HARQ process is less than the maximum number of transmissions, the first timer When timeout/stop, the first terminal device determines to release the first HARQ process.
  • the first terminal device determines to release the first HARQ process according to the maximum number of transmissions and the first timer, which may include: when the number of transmissions of the first TB by the first HARQ process is equal to or exceeds the maximum number of transmissions, A terminal device determines to release the first HARQ process.
  • step 702 the method further includes:
  • the first terminal device notifies the second terminal device that the first timer expires/stops, or the number of first TBs transmitted through the first HARQ process is equal to or exceeds the maximum number of transmissions, or the first HARQ process is released.
  • the method further includes: the first terminal device stops the first timer.
  • the first terminal device can refer to the first implementation manner to release the first HARQ process, which will not be repeated.
  • the first timer in the first terminal device is configured, which will not be repeated.
  • the first terminal device can refer to the third embodiment to start/restart the first timer, which will not be repeated.
  • the first terminal device can comprehensively consider the timer and the maximum transmission times of the TB, and determine whether to release the first HARQ process according to the timer and the maximum transmission times of the TB, and stop the first HARQ associated first timing In this way, the sender not only determines to release the first HARQ process based on the timer or the maximum number of transmissions of the TB, but also improves the transmission requirements of the TB.
  • each network element such as the first terminal device and the second terminal device, includes hardware structures and/or software modules corresponding to each function in order to implement the above-mentioned functions.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiment of the application can divide the first terminal device and the second terminal device into functional modules according to the above method examples.
  • each functional module can be divided corresponding to each function, or two or more functions can be integrated into one.
  • Processing module can be implemented in the form of hardware or software function modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 8 shows a structural diagram of a communication device 80.
  • the communication device 80 may be a first terminal device, or a chip in the first terminal device, or a system on a chip.
  • the communication device 80 may be used to perform the above-mentioned embodiments.
  • the communication device 80 shown in FIG. 8 may include: a processing unit 801 and a sending unit 802;
  • the processing unit 801 is configured to determine that the TB transmitted through the first HARQ process is the first TB transmitted in the last time or is a newly transmitted TB, or the number of the first TB transmitted through the first HARQ process reaches the maximum The number of transmissions, stop the first timer.
  • the processing unit 801 may support the communication device 80 to perform step 401.
  • the sending unit 802 is configured to send first indication information to the second terminal device, where the first indication information is used to indicate that the transmission block TB transmitted through the first HARQ process is the last transmitted first TB or a new transmission TB, Or, it is used to indicate that the number of times of the first TB transmitted through the first HARQ process reaches the maximum number of transmissions.
  • the sending unit 802 may be used to instruct the communication device 80 to perform step 402.
  • the processing unit 801 is configured to determine that the number of times of receiving a negative acknowledgement NACK is equal to or more than M times, and stop the first timer.
  • the processing unit 801 may support the communication device 80 to perform step 504.
  • the sending unit 802 is configured to transmit the first TB to the second terminal device through the first HARQ process.
  • the sending unit 802 may support the communication device 80 to perform step 701.
  • the processing unit 801 is configured to determine to release the first HARQ process according to the maximum number of transmissions and/or the first timer. For example, the processing unit 801 may be used to support the communication device 80 to perform step 702.
  • processing unit 801 can refer to the first implementation to the fourth implementation in the method embodiment to implement maintenance of the first timer associated with the first HARQ, which will not be repeated.
  • the communication device 80 is configured to perform the function of the first terminal device in the method for controlling the HARQ process shown in FIG. 4 or FIG. 5 or FIG. 7, and therefore, can achieve the same effect as the method for controlling the HARQ process described above.
  • the communication device 80 shown in FIG. 8 may further include a storage module for storing program codes and data of the communication device 80.
  • the processing unit 801 may be a processor or a controller. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of this application.
  • the processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.
  • the sending unit may be a transceiver circuit or a communication interface.
  • the storage module may be a memory. When the processing unit 801 is the processor 301, the sending unit 802 is the transceiver circuit 302, and the storage module is the memory 304, the communication device 80 involved in the embodiment of the present application may be the device 300 shown in FIG. 3.
  • FIG. 9 shows a structural diagram of a communication device 90.
  • the communication device 90 may be a second terminal device, or a chip in the second terminal device, or a system-on-chip.
  • the communication device 90 may be used to perform the above-mentioned embodiments.
  • the communication device 90 shown in FIG. 9 may include: a receiving unit 901 and a processing unit 902;
  • the receiving unit 901 is configured to receive first indication information from the first terminal device, where the first indication information is used to indicate that the transmission block TB transmitted through the first HARQ process is the first TB transmitted last time Either the TB is newly transmitted, or it indicates that the number of times of passing the first TB corresponding to the first HARQ process reaches the maximum number of transmissions.
  • the receiving unit 901 is configured to support the communication device 90 to perform step 403.
  • the processing unit 902 is configured to stop the second timer according to the first indication information, where the second timer is associated with the second HARQ process, and the second HARQ process is associated with the first HARQ process.
  • the processing unit 902 is configured to support the communication device 90 to perform step 403.
  • the processing unit 902 is configured to determine that the number of times of feeding back a negative acknowledgement NACK to the first terminal device exceeds M times, and stop the second timer.
  • the processing unit 902 is configured to support the communication device 90 to perform step 505.
  • the processing unit 902 is configured to transmit the corresponding first transmission block TB after successfully decoding the second HARQ process transmitted by the first terminal device, or send an acknowledgement ACK corresponding to the first TB to the first terminal device , Or, generate an acknowledgement ACK sent to the first terminal device, or receive a new transmission instruction from the first terminal device, or the case where the distance between the second terminal device and the first terminal device is greater than the preset distance Next, clear the buffer associated with the second HARQ process, and stop receiving the first TB through the second HARQ process. Further, the second TB is received through the second HARQ process.
  • the processing unit 902 is configured to support the communication device 90 to perform step 601 and step 602.
  • processing unit 902 can refer to the fifth implementation to the eighth implementation in the method embodiment to implement the maintenance of the second timer associated with the second HARQ, which will not be repeated.
  • the communication device 90 is used to perform the function of the second terminal device in the method for controlling the HARQ process shown in FIG. 4 or FIG. 5 or FIG. 6, and therefore, can achieve the same effect as the above method for controlling the HARQ process.
  • the communication device 90 shown in FIG. 9 may further include a storage module for storing program codes and data of the communication device 90.
  • the processing unit 902 may be a processor or a controller. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of this application.
  • the processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.
  • the sending unit 901 may be a transceiver circuit or a communication interface or the like.
  • the storage module may be a memory. When the processing unit 902 is the processor 301, the sending unit 901 is the transceiver circuit 302, and the storage module is the memory 304, the communication device 90 involved in the embodiment of the present application may be the device 300 shown in FIG. 3.
  • FIG. 10 is a structural diagram of a communication system provided by an embodiment of the application. As shown in FIG. 10, the communication system may include: a first terminal device 100 and a second terminal device 110. Further, it may also include network equipment.
  • the first terminal device 100 has the function of the communication device 80 shown in FIG. 8.
  • the second terminal device 110 has the function of the communication device 90 shown in FIG. 9.
  • the first terminal device 100 is configured to determine that the TB transmitted through the first HARQ process is the first TB transmitted in the last time or is a newly transmitted TB, or the number of the first TB transmitted through the first HARQ process
  • the first timer is stopped, and the first indication information is sent to the second terminal device 110.
  • the first indication information is used to indicate that the transmission block TB transmitted through the first HARQ process is the first TB transmitted in the last time or is Newly transmitted TB, or used to indicate that the number of times of the first TB transmitted through the first HARQ process reaches the maximum number of transmissions;
  • the second terminal device 110 is configured to stop the second timer according to the first indication information.
  • the first terminal device 100 is configured to stop the first timer when the number of NACKs corresponding to the first TB is equal to or more than M times.
  • the number of times of NACK corresponding to the first TB of the second terminal device 110 is equal to or more than M times, and the second timer is stopped.
  • the first terminal device 100 is configured to determine to release the first HARQ process according to the maximum number of transmissions and/or the first timer.
  • the second terminal device 110 is configured to transmit the corresponding first transmission block TB in the second HARQ process transmitted by the first terminal device 100, or send the corresponding first transmission block TB to the first terminal device 100 Acknowledgment ACK, or an acknowledgment ACK sent to the first terminal device 100 is generated, or a new transmission instruction from the first terminal device 100 is received, or the second terminal device 110 and the first terminal device 100 If the distance is greater than the preset distance, clear the buffer associated with the second HARQ process, and stop receiving the first TB through the second HARQ process.
  • the first terminal device 100 and the second terminal device 110 can be used to perform the functions of the second terminal device in the method for controlling the HARQ process shown in FIGS. 4 to 7, and therefore can achieve the same effect as the above method for controlling the HARQ process.
  • the embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the foregoing method embodiments may be completed by a computer program instructing relevant hardware.
  • the program may be stored in the foregoing computer-readable storage medium. When the program is executed, it may include processes as in the foregoing method embodiments. .
  • the computer-readable storage medium may be an internal storage unit of the terminal device (including the data sending end and/or the data receiving end) of any of the foregoing embodiments, such as the hard disk or memory of the terminal device.
  • the computer-readable storage medium may also be an external storage device of the terminal device, such as a plug-in hard disk, a smart media card (SMC), or a secure digital (SD) card equipped on the terminal device. Flash card, etc.
  • the aforementioned computer-readable storage medium may also include both an internal storage unit of the aforementioned terminal device and an external storage device.
  • the aforementioned computer-readable storage medium is used to store the aforementioned computer program and other programs and data required by the aforementioned terminal device.
  • the above-mentioned computer-readable storage medium can also be used to temporarily store data that has been output or will be output.
  • At least one (item) refers to one or more
  • “multiple” refers to two or more than two
  • “at least two (item)” refers to two or three And three or more
  • “and/or” is used to describe the association relationship of the associated objects, indicating that there can be three kinds of relationships, for example, "A and/or B” can mean: only A, only B, and A at the same time And B three cases, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are in an "or” relationship.
  • At least one item (a) refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • at least one of a, b, or c can mean: a, b, c, "a and b", “a and c", “b and c", or "a and b and c" ", where a, b, and c can be single or multiple.
  • connection means that B is associated with A.
  • B can be determined from A.
  • determining B based on A does not mean that B is determined only based on A, and B can also be determined based on A and/or other information.
  • connection appearing in the embodiments of the present application refers to various connection modes such as direct connection or indirect connection to realize communication between devices, which is not limited in the embodiments of the present application.
  • transmit/transmission in the embodiments of this application refers to two-way transmission, including sending and/or receiving actions.
  • the “transmission” in the embodiment of the present application includes the sending of data, the receiving of data, or the sending of data and the receiving of data.
  • the data transmission here includes uplink and/or downlink data transmission.
  • the data may include channels and/or signals, uplink data transmission means uplink channel and/or uplink signal transmission, and downlink data transmission means downlink channel and/or downlink signal transmission.
  • the "network” and “system” appearing in the embodiments of the present application express the same concept, and the communication system is the communication network.
  • the disclosed device and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components may be divided. It can be combined or integrated into another device, or some features can be omitted or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium.
  • the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of a software product, and the software product is stored in a storage medium. It includes several instructions to enable a device, such as a single-chip microcomputer, a chip, etc., or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

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Abstract

本申请公开一种控制HARQ进程的方法以及装置，涉及通信技术领域，以实现收端、发端对HARQ进程控制的理解一致性。该方法包括：第一终端装置确定通过第一HARQ进程传输的TB为最后一次传输的第一TB或者是新传TB，或者，通过第一HARQ进程传输的第一TB的次数达到最大传输次数，停止第一定时器。进一步的，第一终端装置向第二终端装置发送用于指示第一HARQ进程传输的TB是新传TB或者为最后一次传输的第一TB，或者，通过第一HARQ进程传输的第一TB的次数达到最大传输次数的第一指示信息；第二终端装置接收第一指示信息，根据第一指示信息，停止第二定时器。

Description

一种控制HARQ进程的方法以及装置 技术领域
本申请实施例涉及通信技术领域，尤其涉及一种控制混合自动重传请求(hybrid automatic repeat-request，HARQ)进程的方法以及装置。
背景技术
在车与任何事物(vehicle-to-everything，V2X)通信系统中，终端装置与终端装置之间可以通过直连链路，如侧行链路(sidelink，SL)，进行无线通信。为了提高该直连链路的通信质量，在V2X通信系统中引入了HARQ机制，HARQ使用停等协议(stop-and-wait protocol)来发送数据。在停等协议中，发端发送一个传输块(transport block，TB)后，就停下来等待确认信息，收端收到该TB后，可以使用1比特的信息对该TB进行肯定应答(acknowledgement，ACK)或否定应答(non-acknowledgement，NACK)的确认。
但是发端每次传输TB后就停下来等待确认，会导致吞吐量很低。因此使用多个并行的HARQ进程(HARQ process)，当一个HARQ process在等待确认信息时，发端可以使用另一个HARQ process来继续发送数据。这些HARQ process共同组成了一个HARQ实体(HARQ entity)，这个实体结合了停等协议，同时允许数据的连续传输。
对于其中每一个HARQ进程，在收发两端均维护有与该HARQ进程相关联的定时器，用该定时器限定通过HARQ进程传输某一TB的时长。然而，目前的机制中，存在收发两端对彼此的定时器理解不一致的问题，这就导致HARQ进程的利用率偏低。
发明内容
有鉴于此，本申请实施例提供了一种控制HARQ进程的方法以及装置，可以保证收端、发端对同一个HARQ进程关联的定时器的理解一致，及时释放HARQ进程与资源，提高HARQ进程的利用率，从而提高系统数据传输的效率。
为达到上述目的，本申请实施例采用如下技术方案：
第一方面，本申请实施例提供一种控制HARQ进程的方法，所述方法包括：第一终端装置确定通过第一HARQ进程传输的TB为最后一次传输的第一TB或者是新传TB，或者，通过第一HARQ进程传输的第一TB的次数达到最大传输次数，停止第一定时器。
进一步的，第一终端装置还向第二终端装置发送用于指示通过第一HARQ进程传输的TB是新传TB或最后一次传输的第一TB，或者，用于指示通过第一HARQ进程传输的第一TB的次数达到最大传输次数的第一指示信息，以指示第二终端装置停止第二定时器。
第二方面，本申请实施例又提供一种控制HARQ进程的方法，所述方法包括：第一终端装置确定接收NACK的次数等于或超过M次，M为大于或者等于1的整数，NACK用于指示第二终端装置未正确接收到通过第一HARQ进程传输的第一TB，停止第一定时器。
基于第一方面所述的方法，在第一终端装置确定触发第一HARQ进程关联的第一定时器停止的条件满足时，停止第一定时器，并向第二终端装置发送第一指示信息，通过第一指示信息指示触发第一HARQ进程关联的第一定时器停止的条件满足，以便于第二终端装置根据第一指示信息的指示，停止第二终端装置中与第一HARQ进程关联的HARQ进程 关联的第二定时器。如此，使收发两端能够基于相同的触发事件停止各自维护的与HARQ进程关联的定时器，对齐收发两端停止各自维护的与HARQ进程关联的定时器的行为，避免因收发两端对各自维护的与HARQ进程关联的定时器的停止时间理解不一致，导致收端的HARQ被锁定不能用于传输其他TB，资源浪费的问题。
基于第二方面所述的方法，使得发端可以基于接收到的收端发送的NACK的次数来维护与HARQ进程关联的定时器，使用无需交互的、收发两端均确知的参数来维护与HARQ进程关联的定时器，保证了收发两端对彼此维护的与HARQ进程关联的定时器的停止时间理解一致，提高了HARQ进程与资源的利用率。
一种可能的设计中，结合第一方面或者第二方面，所述方法还包括：第一终端装置释放第一HARQ进程，和/或，第一终端装置向网络设备发送用于通知网络设备释放第一HARQ的释放通知。基于该设计，第一终端装置可以在停止第一定时器后，及时释放第一HARQ进程以及通过第一HARQ进程传输的第一TB所对应的sidelink传输资源，避免资源浪费，提高HARQ进程的利用率，从而提高系统数据传输的效率。
一种可能的设计中，结合第一方面或者第一方面的任一可能的设计或者第二方面或者第二方面的可能的设计，第一定时器以及第一定时器的时长由第一终端装置配置，第一TB复用一个或者多个LCH的数据，第一定时器的时长等于一个或者多个LCH中，优先级最高的LCH对应的第一参数，或者，第一TB复用一个或者多个逻辑信道LCH的数据，第一定时器的时长等于一个或者多个LCH对应的第一参数中取值最小的第一参数。LCH对应的第一参数可以是指LCH的定时器时长参数，LCH对应的第一参数可以是预配置参数或者由网络设备配置。基于该可能的设计，可以以LCH为粒度配置第一定时器的时长，如：将第一定时器的时长配置为优先级较高的LCH对应的时长参数，或者，配置为LCH对应的时长参数中取值最小的时长参数，使在第一定时器有效期内传输的TB满足其复用的各个LCH的服务质量要求或者时延要求。
又一种可能的设计中，结合第一方面或者第一方面的任一可能的设计或者第二方面或者第二方面的可能的设计，第一定时器、第一定时器的时长可以是预配置参数或者由网络设备配置。基于该设计，可以由网络设备配置第一定时器的相关参数，如：第一定时器的时长，提高网络侧对定时器的管理，同时，无需第一终端装置配置，降低了第一终端装置的设计复杂度。
又一种可能的设计中，结合第一方面或者第一方面的任一可能的设计或者第二方面或者第二方面的任一可能的设计，所述方法还包括：第一终端装置接收新传指示，根据新传指示，启动第一定时器，其中，新传指示用于指示第一终端装置通过第一HARQ进程传输新的TB。新传指示可以携带在DCI或者MAC CE消息中；或者，第一终端装置接收到第二终端装置发送的NACK，启动第一定时器，其中，NACK用于指示第二终端装置未正确接收到第一TB，N为大于或者等于1的整数；或者，第一终端装置确定通过第一HARQ进程向第二终端装置重传第一TB,启动第一定时器。基于该设计，第一终端装置可以在新传TB或者收到NACK或者重传第一TB的情况下，及时启动第一定时器，简单易行，且保证TB的正常传输，提高TB传输的可靠性。
又一种可能的设计中，结合第一方面或者第一方面的任一可能的设计或者第二方面或者第二方面的任一可能的设计，所述方法还包括：若第一定时器未超时，和/或，第一TB 的次数未达到最大传输次数，若第二终端装置未正确接收到第一TB和/或用于传输第一TB的资源小于预设阈值，和/或，配置了重复(repetition)的前提下无剩余的重复资源，和/或，无预留资源，则第一终端装置获取新的用于传输第一TB的资源；或者，若第一定时器未超时，第一TB的次数未达到最大传输次数，用于传输第一TB的资源小于预设阈值，和/或，配置了重复(repetition)的前提下无剩余的重复资源，第一终端装置获取新的用于传输第一TB的资源。
其中，第一终端装置获取新的用于传输第一TB的资源，包括：第一终端装置从网络设备获取用于传输第一TB的资源或者第一终端装置自主选择用于传输第一TB的资源；或者，第一终端设备触发资源请求，并向网络发送该资源请求，等待网络设备分配传输资源；或者，第一终端设备触发资源重选，在预配置或配置的资源池中选择传输资源，或预留重传资源。
基于该可能的设计，第一终端装置可以在定时器运行期间和/或/或第一TB的传输次数未达到最大传输次数，但用于传输第一TB的资源不够用的情况下，请求新的用于传输第一TB的sidelink资源，保证第一TB的正常传输。
又一种可能的设计中，结合第一方面或者第一方面的任一可能的设计或者第二方面或者第二方面的任一可能的设计，所述方法还包括：第一终端装置接收到第二终端装置反馈的ACK，第一终端装置清空第一HARQ进程关联的缓存(buffer)，ACK用于指示第二终端装置正确接收到第一终端装置通过第一HARQ进程传输的第一TB。或者，第一终端装置接收来自网络设备的新传指示，第一终端装置根据新传指示，清空第一HARQ进程关联的buffer，新传指示用于指示第一终端装置通过第一HARQ进程传输新的TB，如第二TB。或者，在第一终端装置通过第一HARQ进程，向第二终端装置成功发送最后一次传输的第一TB时，第一终端装置清空第二HARQ进程关联的buffer。基于该可能的设计，第一终端装置可以在TB传输成功后或者新传TB时或者成功发完最后一个第一TB后，清空第一HARQ进程关联的buffer，这样可以利用第一HARQ进程关联的buffer存储其他新的TB。如此，可以及时清理已经成功传输第一TB或者不适合传输第一TB的HARQ进程关联的buffer，提高第一终端装置的存储能力。同时，传输新的TB，提高HARQ进程的利用率。
第三方面，本申请实施例还提供一种装置，该装置可以为第一终端装置或者第一终端装置中的芯片或者片上系统，还可以为第一终端装置中用于实现第一方面或第二方面或第一方面和第二方面的任一可能的设计所述的方法的功能模块。该装置可以实现上述各方面或者各可能的设计中第一终端装置所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。如：该装置可以包括：处理单元。进一步的，还包括发送单元；
一种示例中，处理单元，用于确定通过第一HARQ进程传输的TB为最后一次传输的第一TB或者是新传TB，或者，通过第一HARQ进程传输的第一TB的次数达到最大传输次数，停止第一定时器。
发送单元，用于向第二终端装置发送第一指示信息，其中，第一指示信息用于指示通过第一HARQ进程传输的传输块TB为最后一次传输的第一TB或者是新传TB，或者，用于指示通过第一HARQ进程传输的第一TB的次数达到最大传输次数。
又一种示例中，处理单元，用于确定接收否定应答NACK的次数等于或超过M次，停止第一定时器。
基于第三方面的方法，在第一终端装置确定触发第一HARQ进程关联的第一定时器停止的条件满足时，停止第一定时器，同时，并向第二终端装置发送第一指示信息，通过第一指示信息指示触发第一HARQ进程关联的第一定时器停止的条件满足，以便于第二终端装置根据第一指示信息的指示，停止第二终端装置中与第一HARQ进程关联的HARQ进程的第二定时器。或者，第一终端装置基于传输失败的TB的次数停止HARQ进程关联的定时器。如此，使收发两端基于相同的触发事件停止各自维护的与HARQ进程关联的定时器，对齐收发两端停止各自维护的与HARQ进程关联的定时器的行为，避免因收发两端对各自维护的与HARQ进程关联的定时器的停止时间理解不一致，导致收端的HARQ被锁定不能用于传输其他TB，资源浪费的问题。
一种可能的设计中，结合第三方面，所述处理单元还用于释放第一HARQ进程，和/或，通过发送单元向网络设备发送用于通知网络设备释放第一HARQ的释放通知。
基于该可能的设计，第一终端装置可以在停止第一定时器后或者同时，具体时刻不限定，可选的，如果存在，及时释放第一HARQ进程以及通过第一HARQ进程传输的第一TB所对应的sidelink传输资源，避免资源浪费，提高HARQ进程的利用率，从而提高系统数据传输的效率。
一种可能的设计中，结合第三方面或者第三方面的任一可能的设计，第一定时器以及第一定时器的时长由第一终端装置配置，第一TB复用一个或者多个LCH的数据，第一定时器的时长等于一个或者多个LCH中，优先级最高的LCH对应的第一参数，或者，第一TB复用一个或者多个逻辑信道LCH的数据，第一定时器的时长等于一个或者多个LCH对应的第一参数中取值最小的第一参数。LCH对应的第一参数指LCH的配置中的定时器时长，LCH对应的第一参数是预配置参数或者由网络设备配置。
基于该可能的设计，可以以LCH为粒度配置第一定时器的时长，如：将第一定时器的时长配置为优先级较高的LCH对应的时长，或者，LCH对应的时长中取值最小的时长，使第一定时器有效期内传输的TB满足各个LCH的服务质量要求。
又一种可能的设计中，结合第三方面或者第三方面的任一可能的设计，第一定时器、第一定时器的时长是预配置参数或者由网络设备配置。
基于该可能的设计，可以由网络设备配置第一定时器的相关参数，如：第一定时器的时长，提高网络侧对定时器的管理，同时，无需第一终端装置配置，降低了第一终端装置的设计复杂度。
又一种可能的设计中，结合第三方面或者第三方面的任一可能的设计，所述装置还包括：接收单元，用于接收新传指示，所述处理单元，用于根据新传指示，启动第一定时器，其中，新传指示用于指示第一终端装置通过第一HARQ进程新传TB，新传指示携带在DCI或者MAC CE中；或者，第一终端装置接收到第二终端装置发送的NACK，启动第一定时器，其中，NACK用于指示第二终端装置未正确接收到第一TB，N为大于或者等于1的整数；或者，第一终端装置确定通过第一HARQ进程向第二终端装置重传第一TB,启动第一定时器。
基于该可能的设计，可以在新传TB或者收到NACK或者重传第一TB的情况下，启 动第一定时器，简单易行，且保证TB的正常传输，提高TB传输的可靠性。
又一种可能的设计中，结合第三方面或者第三方面的任一可能的设计，所述处理单元，还用于若第一定时器未超时和/或第一TB的次数未达到最大传输次数、第二终端装置未正确接收到第一TB以及用于传输第一TB的资源小于预设阈值，则获取新的用于传输第一TB的资源；或者，若第一定时器未超时，第一TB的次数未达到最大传输次数，用于传输第一TB的资源小于预设阈值，获取新的用于传输第一TB的资源。
基于该可能的设计，可以在定时器运行期间和/或者第一TB的传输次数未达到最大传输次数，但用于传输第一TB的资源不够用的情况下，请求新的用于传输第一TB的sidelink资源，保证第一TB的正常传输。
又一种可能的设计中，结合第三方面或者第三方面的任一可能的设计，所述接收单元，还用于接收到第二终端装置反馈的ACK，所述处理单元，用于清空第一HARQ进程关联的缓存buffer，ACK用于指示第二终端装置正确接收到第一终端装置通过第一HARQ进程传输的第一TB，或者，所述接收单元，用于接收来自网络设备的新传指示，所述处理单元，用于根据新传指示，清空第二HARQ进程关联的buffer，新传指示用于指示第一终端装置通过第一HARQ进程传输新的TB；或者，所述处理单元，还用于在第一终端装置通过第一HARQ进程，向第二终端装置成功发送最后一次传输的第一TB时，清空第二HARQ进程关联的buffer。
基于该可能的设计，可以在TB传输成功后或者新传TB时或者成功发完最后一个第一TB后，清空第一HARQ进程关联的buffer，利用第一HARQ进程关联的buffer存储其他新的TB。如此，可以及时清理成功传输TB或者不利于传输TB的HARQ进程关联的buffer，提高第一终端装置的存储能力。同时，传输新的TB，提高HARQ进程的利用率。
第四方面，提供了一种装置，该装置可以为第一终端装置或者第一终端装置中的芯片或者片上系统。该装置可以实现上述各方面或者各可能的设计中第一终端装置所执行的功能，所述功能可以通过硬件实现。一种可能的设计中，该装置可以包括：至少一个处理器和收发电路，涉及的程序指令在该至少一个处理器中执行，以使得该通信装置实现第一方面或第二方面或者第一方面和第二方面的其任一可能的设计。例如：处理器确定通过第一HARQ进程传输的TB为最后一次传输的第一TB或者是新传TB，或者，通过第一HARQ进程传输的第一TB的次数达到最大传输次数，停止第一定时器，并通过收发电路向第二终端装置发送第一指示信息，其中，第一指示信息用于指示通过第一HARQ进程传输的传输块TB为最后一次传输的第一TB或者是新传TB，或者，用于指示通过第一HARQ进程传输的第一TB的次数达到最大传输次数。或者，处理器确定接收否定应答NACK的次数等于或超过M次，停止第一定时器。在又一种可能的设计中，所述装置还可以包括存储器，存储器，用于保存装置必要的计算机执行指令和数据。当该装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该装置执行如上述第一方面或者第一方面的任一种可能的设计所述的控制HARQ进程的方法。
第五方面，提供了一种计算机可读存储介质，该计算机可读存储介质可以为可读的非易失性存储介质，该计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述第一方面或者第二方面或者上述方面的任一种可能的设计所述的控制HARQ进程的方法。
第六方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面或者第二方面或者上述方面的任一种可能的设计所述的控制HARQ进程的方法。
第七方面，提供了一种装置，该装置可以为第一终端装置或者第一终端装置中的芯片或者片上系统，该装置包括一个或多个处理器、一个或多个存储器。所述一个或多个存储器与所述一个或多个处理器耦合，所述一个或多个存储器用于存储计算机程序代码，所述计算机程序代码包括计算机指令，当所述一个或多个处理器执行所述计算机指令时，使所述装置执行如上述第一方面或第二方面或者上述方面的任一可能的设计所述的控制HARQ进程的方法。
其中，第三方面至第七方面中任一种设计方式所带来的技术效果可参见上述第一方面或者第二方面或者第一方面和第二方面的任一种可能的设计所带来的技术效果，不再赘述。
第八方面，本申请实施例还提供一种控制HARQ进程的方法，所述方法还包括：第二终端装置接收来自第一终端装置的用于指示通过第一HARQ进程传输的TB为最后一次传输的第一TB或者是新传TB，或者，指示通过第一HARQ进程对应的第一TB的次数达到最大传输次数的第一指示信息，根据第一指示信息，停止第二定时器。
第九方面，本申请实施例还提供一种控制HARQ进程的方法，所述方法包括：第二终端装置确定向第一终端装置反馈NACK的次数超过M次，停止第二定时器。
基于第八方面或者第九方面所述的方法，在第一终端装置确定触发第一HARQ进程关联的第一定时器停止的条件满足时，向第二终端装置发送第一指示信息，通过第一指示信息指示触发第一HARQ进程关联的第一定时器停止的条件满足，第二终端装置根据第一指示信息的指示，停止第二终端装置中与第一HARQ进程关联的HARQ进程的第二定时器。或者，第二终端装置基于传输失败的TB的次数停止HARQ进程关联的定时器。如此，收发两端基于相同的触发事件停止各自维护的与HARQ进程关联的定时器，对齐收发两端停止各自维护的与HARQ进程关联的定时器的行为，避免收发两端对各自维护的与HARQ进程关联的定时器的停止时间理解不一致，导致收端的HARQ被锁定不能用于传输其他TB，资源浪费的问题。
一种可能的设计中，结合第八方面或者第九方面，或者第八方面和第九方面的任一可能的设计，M由第一终端装置配置给第二终端装置。
基于该可能的设计，可以由第一终端装置将最大传输次数配置第二终端装置，使收发两端对最大传输次数的理解是一致的，进一步的，使收发两端根据TB的最大传输次数停止定时器的时间点对齐。
一种可能的设计中，结合第八方面或者第九方面，或者第八方面和第九方面的任一可能的设计，第二终端装置接收来自第一终端装置的配置信息，根据配置信息启动第二定时器，其中，配置信息用于指示第二终端装置启动第二定时器；或者，第二终端装置接收来自网络设备的用于指示重启第二定时器的重启指示，根据重启指示启动第二定时器。
基于该可能的设计，第二终端装置可以根据第一终端装置的指示或网络设备的指示启动第二定时器，使启动定时器的时间点与发端启动定时器的时间点对齐。
一种可能的设计中，结合第八方面或者第九方面，或者第八方面和第九方面的任一可能的设计，第二定时器以及第二定时器的时长是预配置参数或者由网络设备配置；或者， 第二定时器以及第二定时器的时长由第一终端装置配置；或者，第二定时器、第二定时器的时长由第二终端装置配置。
基于该可能的设计，可以由第一终端装置配置定时器以及定时器的时长，使收发两端对定时器的理解是一致的。
一种可能的设计中，结合第八方面或者第九方面，或者第八方面和第九方面的任一可能的设计，所述方法还包括：在第二定时器运行期间，第二终端装置向第一终端装置反馈第一TB对应的ACK或者NACK；或者，在第二定时器运行期间，第二终端装置对第二HARQ进程相关联的缓存buffer中的TB进行合并处理。
基于该可能的设计，可以保证第二终端装置在第二定时器运行期间，正常处理接收到的TB，提高TB的处理效率和传输可靠性。
一种可能的设计中，结合第八方面或者第九方面，或者第八方面和第九方面的任一可能的设计，所述方法还包括：第二终端装置清空第二HARQ进程相关联的buffer，第二终端装置停止通过第二HARQ进程接收第一TB，通过第二HARQ进程接收第二TB。
基于该可能的设计，第二终端装置可以清空第二HARQ进程关联的buffer，利用第二HARQ进程关联的buffer存储其他新的TB。如此，可以及时清理成功传输TB或者不利于传输TB的HARQ进程关联的buffer，提高第二终端装置的存储能力。同时，传输新的TB，提高HARQ进程的利用率。
第十方面，本申请实施例还提供一种装置，该装置可以为第二终端装置或者第二终端装置中的芯片或者片上系统，还可以为第二终端装置中用于实现第八方面或第九方面或第八方面和第九方面的任一可能的设计所述的方法的功能模块。该装置可以实现上述各方面或者各可能的设计中第二终端装置所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。如：该装置可以包括：接收单元，处理单元；
一种示例中，接收单元，用于接收来自第一终端装置的第一指示信息，其中，第一指示信息用于指示通过第一HARQ进程传输的传输块TB为最后一次传输的第一TB或者是新传TB，或者，指示通过第一HARQ进程对应的第一TB的次数达到最大传输次数。
处理单元，用于根据第一指示信息，停止第二定时器，其中，第二定时器与第二HARQ进程关联，第二HARQ进程与第一HARQ进程关联。
又一种示例中，处理单元，用于确定向第一终端装置反馈否定应答NACK的次数超过M次，停止第二定时器。
基于十方面所述的装置，可以在确定触发第一HARQ进程关联的第一定时器停止的条件满足时，向第二终端装置发送第一指示信息，通过第一指示信息指示触发第一HARQ进程关联的第一定时器停止的条件满足，第二终端装置根据第一指示信息的指示，停止第二终端装置中与第一HARQ进程关联的HARQ进程的第二定时器。或者，第二终端装置基于传输失败的TB的次数停止HARQ进程关联的定时器。如此，收发两端基于相同的触发事件停止各自维护的与HARQ进程关联的定时器，对齐收发两端停止各自维护的与HARQ进程关联的定时器的行为，避免收发两端对各自维护的与HARQ进程关联的定时器的停止时间理解不一致，导致收端的HARQ被锁定不能用于传输其他TB，资源浪费的问题。
一种可能的设计中，结合第十方面，M由第一终端装置配置给第二终端装置。
基于该可能的设计，可以由第一终端装置将最大传输次数配置第二终端装置，使收发两端对最大传输次数的理解是一致的，进一步的，使收发两端根据TB的最大传输次数停止定时器的时间点对齐。
一种可能的设计中，结合第十方面或者第十方面的任一可能的设计，所述处理单元，用于通过接收单元接收来自第一终端装置的配置信息，根据配置信息启动第二定时器，其中，配置信息用于指示第二终端装置启动第二定时器；或者，通过接收单元接收来自网络设备的用于指示重启第二定时器的重启指示，根据重启指示启动第二定时器。
基于该可能的设计，可以根据第一终端装置的指示或网络设备的指示启动第二定时器，使启动定时器的时间点与发端启动定时器的时间点对齐。
一种可能的设计中，结合第十方面，或者第十方面的任一可能的设计，第二定时器以及第二定时器的时长是预配置参数或者由网络设备配置；或者，第二定时器以及第二定时器的时长由第一终端装置配置；或者，第二定时器、第二定时器的时长由第二终端装置配置。
基于该可能的设计，可以由第一终端装置配置定时器以及定时器的时长，使收发两端对定时器的理解是一致的。
一种可能的设计中，结合第十方面或者第十方面的任一可能的设计，所述装置还包括：发送单元，用于在第二定时器运行期间，向第一终端装置反馈第一TB对应的ACK或者NACK；或者，所述处理单元，还用在第二定时器运行期间，对第二HARQ进程相关联的缓存buffer中的TB进行合并处理。
基于该可能的设计，可以保证第二终端装置在第二定时器运行期间，正常处理接收到的TB，提高TB的处理效率和传输可靠性。
一种可能的设计中，结合第十方面或者第十方面的任一可能的设计，所述处理单元还包括：清空第二HARQ进程相关联的buffer，停止通过第二HARQ进程接收第一TB，通过第二HARQ进程接收第二TB。
基于该可能的设计，可以清空第二HARQ进程关联的buffer，利用第二HARQ进程关联的buffer存储其他新的TB。如此，可以及时清理成功传输TB或者不利于传输TB的HARQ进程关联的buffer，提高第二终端装置的存储能力。同时，传输新的TB，提高HARQ进程的利用率。
第十一方面，提供了一种装置，该装置可以为第二终端装置或者第二终端装置中的芯片或者片上系统。该装置可以实现上述各方面或者各可能的设计中第二终端装置所执行的功能，所述功能可以通过硬件实现。一种可能的设计中，该装置可以包括：至少一个处理器和收发电路，涉及的程序指令在该至少一个处理器中执行，以使得该通信装置实现第八方面或第九方面或者第八方面和第九方面的其任一可能的设计。例如：处理器通过收发电路接收来自第一终端装置的用于指示通过第一HARQ进程传输的传输块TB为最后一次传输的第一TB或者是新传TB，或者，指示通过第一HARQ进程对应的第一TB的次数达到最大传输次数的第一指示信息，根据第一指示信息，停止第二定时器。或者，处理单元确定向第一终端装置反馈否定应答NACK的次数超过M次，停止第二定时器。在又一种可能的设计中，所述装置还可以包括存储器，存储器，用于保存装置必要的计算机执行指令和数据。当该装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该装置 执行如上述第八方面或者第八方面的任一种可能的设计所述的控制HARQ进程的方法。
第十二方面，提供了一种计算机可读存储介质，该计算机可读存储介质可以为可读的非易失性存储介质，该计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述第八方面或上述方面的任一种可能的设计所述的控制HARQ进程的方法。
第十三方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第八方面或上述方面的任一种可能的设计所述的控制HARQ进程的方法。
第十四方面，提供了一种装置，该装置可以为第二终端装置或者第二终端装置中的芯片或者片上系统，该装置包括一个或多个处理器、一个或多个存储器。所述一个或多个存储器与所述一个或多个处理器耦合，所述一个或多个存储器用于存储计算机程序代码，所述计算机程序代码包括计算机指令，当所述一个或多个处理器执行所述计算机指令时，使所述装置执行上述第八方面或第八方面的任一可能的设计所述的控制HARQ进程的方法。
其中，第十方面至第十四方面中任一种设计方式所带来的技术效果可参见上述第八方面或第九方面或者第八方面和第九方面的任一种可能的设计所带来的技术效果，不再赘述。
第十五方面，本申请实施例还提供一种控制HARQ进程的方法，所述方法还包括：第二终端装置成功解码第一终端装置传输的第二HARQ进程传输对应的第一TB，或者，向第一终端装置发送第一TB对应的ACK，或者，生成向第一终端装置发送的ACK，或者，接收到来自第一终端装置的用于指示通过第二HARQ进程新传TB的新传指示，或者，第二终端装置与第一终端装置之间的距离大于预设距离，第二终端装置清空第二HARQ进程关联的缓存buffer，第二终端装置停止通过第二HARQ进程接收第一TB，通过第二HARQ进程接收第二TB。
基于第十五方面所述的方法，第二终端装置在成功解码第二终端装置通过第二HARQ进程接收到的第一TB，或者，向第一终端装置发送第一TB对应的ACK，或者，生成向第一终端装置发送的ACK，或者，接收到来自第一终端装置的新传指示，或者，第二终端装置与第一终端装置之间的距离大于预设距离的情况下，清空第二HARQ进程关联的buffer，利用第二HARQ进程关联的buffer存储其他新的TB。如此，可以及时清理成功传输TB或者不利于传输TB的HARQ进程关联的buffer，提高第二终端装置的存储能力。
第十六方面，本申请实施例还提供一种装置，该装置可以为第二终端装置或者第二终端装置中的芯片或者片上系统，还可以为第二终端装置中用于实现第十五方面或其任一可能的设计所述的方法的功能模块。该装置可以实现上述各方面或者各可能的设计中第二终端装置所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。如：该装置可以包括：处理单元；
处理单元，用于在成功解码第一终端装置传输的第二HARQ进程传输对应的第一TB，或者，向第一终端装置发送第一TB对应的ACK，或者，生成向第一终端装置发送的ACK，或者，接收到来自第一终端装置的用于指示通过第二HARQ进程新传TB的新传指示，或者，第二终端装置与第一终端装置之间的距离大于预设距离，第二终端装置清空第二HARQ进程关联的缓存buffer的情况下，停止通过第二HARQ进程接收第一TB，通过第二HARQ进程接收第二TB。
基于第十六方面所述的装置，可以在成功解码第二终端装置通过第二HARQ进程接收到的第一TB，或者，向第一终端装置发送第一TB对应的ACK，或者，生成向第一终端 装置发送的ACK，或者，接收到来自第一终端装置的新传指示，或者，第二终端装置与第一终端装置之间的距离大于预设距离的情况下，清空第二HARQ进程关联的buffer，利用第二HARQ进程关联的buffer存储其他新的TB。如此，可以及时清理成功传输TB或者不利于传输TB的HARQ进程关联的buffer，提高第二终端装置的存储能力。
第十七方面，提供了一种装置，该装置可以为第二终端装置或者第二终端装置中的芯片或者片上系统。该装置可以实现上述各方面或者各可能的设计中第二终端装置所执行的功能，所述功能可以通过硬件实现。一种可能的设计中，该装置可以包括：至少一个处理器和收发电路，涉及的程序指令在该至少一个处理器中执行，以使得该通信装置实现第十五方面或其任一可能的设计。例如：处理器用于在成功解码第一终端装置传输的第二HARQ进程传输对应的第一传输块TB，或者，向第一终端装置发送第一TB对应的肯定应答ACK，或者，生成向第一终端装置发送的肯定应答ACK，或者，接收到来自第一终端装置的新传指示，或者，第二终端装置与第一终端装置之间的距离大于预设距离的情况下，清空第二HARQ进程关联的缓存buffer，停止通过第二HARQ进程接收第一TB，通过第二HARQ进程接收第二TB。在又一种可能的设计中，所述装置还可以包括存储器，存储器，用于保存装置必要的计算机执行指令和数据。当该装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该装置执行如上述第八方面或者第八方面的任一种可能的设计所述的控制HARQ进程的方法。
第十八方面，提供了一种计算机可读存储介质，计算机可读存储介质可以为可读的非易失性存储介质，该计算机可读存储介质中存储有指令，当其在计算机上运行时，使计算机执行上述第十五方面或第十五方面的任一种可能的设计所述的控制HARQ进程的方法。
第十九方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，得计算机执行上述第十五方面或上述方面的任一种可能的设计所述的控制HARQ进程的方法。
第二十方面，提供了一种装置，该装置可以为第二终端装置或者第二终端装置中的芯片或者片上系统，该装置包括一个或多个处理器、一个或多个存储器。所述一个或多个存储器与所述一个或多个处理器耦合，所述一个或多个存储器用于存储计算机程序代码，所述计算机程序代码包括计算机指令，当所述一个或多个处理器执行所述计算机指令时，使所述装置执行第十五方面或第十五方面的任一可能的设计所述的控制HARQ进程的方法。
其中，第十五方面至第二十方面中任一种设计方式所带来的技术效果可参见上述第十五方面或第九方面或者第十五方面和第九方面的任一种可能的设计所带来的技术效果，不再赘述。
此外，针对现有基于定时器或最大传输次数停止定时器的做法不能满足TB传输的服务质量(quality of service，QoS)要求，例如，不能满足TB的可靠性要求的问题，本申请实施例还提供方法：
第二十一方面，本申请实施例还提供一种控制HARQ进程的方法，所述方法包括：第一终端装置通过第一HARQ进程，向第二终端装置传输第一TB，第一终端设备根据最大传输次数和/或第一定时器，确定释放第一HARQ进程。
基于二十一方面所述的方法，第一终端装置可以综合考虑定时器以及TB的最大传输次数，根据定时器以及TB的最大传输次数，确定是否释放第一HARQ进程，停止第一HARQ关联的第一定时器，如此，使得发端不单单根据定时器或者TB的最大传输次数确 定释放第一HARQ进程，提高TB的传输要求。
一种可能的设计中，结合第二十一方面或者第二十一方面的任一可能的设计，第一终端设备根据最大传输次数和第一定时器，确定释放第一HARQ进程，包括：当第一HARQ进程传输的第一TB的次数小于最大传输次数，第一定时器超时/停止时，第一终端装置确定释放第一HARQ进程。
基于该可能的设计，以定时器为主控制第一终端装置释放第一HARQ进程，避免因传输全部的TB，导致时延较大的问题。
一种可能的设计中，结合第二十一方面或者第二十一方面的任一可能的设计，第一终端设备根据最大传输次数和第一定时器，确定释放第一HARQ进程，包括：当第一HARQ进程传输第一TB的次数等于或超过最大传输次数时，第一终端装置确定释放第一HARQ进程。
基于该可能的设计，以最大传输次数为主控制第一终端装置释放第一HARQ进程，避免因本次已传输完毕所有TB时，定时器还未超时，还未释放HARQ进程时，HARQ进程的资源浪费的问题。
一种可能的设计中，结合第二十一方面或者第二十一方面的任一可能的设计，所述方法还包括：第一终端装置向第二终端装置通知第一定时器超时/停止，或者，通过第一HARQ进程传输的第一TB的次数等于或超过最大传输次数，或者，第一HARQ进程释放。
基于该可能的设计，第一终端装置可以通知第二终端装置超时/停止，或者，通过第一HARQ进程传输的第一TB的次数等于或超过最大传输次数，或者，第一HARQ进程释放，使得第二终端装置也同步释放第二HARQ，避免因还未释放第二HARQ进程，HARQ进程被锁定，资源浪费的问题。
第二十二方面，本申请实施例还提供一种装置，该装置可以为第二终端装置或者第二终端装置中的芯片或者片上系统，还可以为第二终端装置中用于实现第二十一方面或其任一可能的设计所述的方法的功能模块。该装置可以实现上述各方面或者各可能的设计中第二终端装置所执行的功能，所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。如：该装置可以包括：发送单元、处理单元；
发送单元，用于通过第一HARQ进程，向第二终端装置传输第一TB。
处理单元，用于据最大传输次数和/或第一定时器，确定释放第一HARQ进程。
基于二十二方面所述的装置，可以综合考虑定时器以及TB的最大传输次数，根据定时器以及TB的最大传输次数，确定是否释放第一HARQ进程，停止第一HARQ关联的第一定时器，如此，使得发端不单单根据定时器或者TB的最大传输次数确定释放第一HARQ进程，提高TB的传输要求。
一种可能的设计中，结合第二十二方面或者第二十二方面的任一可能的设计，处理单元具体用于：当第一HARQ进程传输的第一TB的次数小于最大传输次数，第一定时器超时/停止时，第一终端装置确定释放第一HARQ进程。
基于该可能的设计，以定时器为主控制第一终端装置释放第一HARQ进程，避免因传输全部的TB，导致时延较大的问题。
一种可能的设计中，结合第二十二方面或者第二十二方面的任一可能的设计，处理单元具体用于：当第一HARQ进程传输第一TB的次数等于或超过最大传输次数时，第一终 端装置确定释放第一HARQ进程。
基于该可能的设计，以最大传输次数为主控制第一终端装置释放第一HARQ进程，避免因本次已传输完毕所有TB时，定时器还未超时，还未释放HARQ进程时，HARQ进程的资源浪费的问题。
一种可能的设计中，结合第二十二方面或者第二十二方面的任一可能的设计，所述处理单元还用于：向第二终端装置通知第一定时器超时/停止，或者，通过第一HARQ进程传输的第一TB的次数等于或超过最大传输次数，或者，第一HARQ进程释放。
基于该可能的设计，第一终端装置可以通知第二终端装置超时/停止，或者，通过第一HARQ进程传输的第一TB的次数等于或超过最大传输次数，或者，第一HARQ进程释放，使得第二终端装置也同步释放第二HARQ，避免因还未释放第二HARQ进程，HARQ进程被锁定，资源浪费的问题。
第二十三方面，提供了一种装置，该装置可以为第二终端装置或者第二终端装置中的芯片或者片上系统。该装置可以实现上述各方面或者各可能的设计中第二终端装置所执行的功能，所述功能可以通过硬件实现。一种可能的设计中，该装置可以包括：至少一个处理器和收发电路，涉及的程序指令在该至少一个处理器中执行，以使得该通信装置实现第二十一方面或其任一可能的设计。例如：处理器通过第一HARQ进程，向第二终端装置传输第一TB，第一终端设备根据最大传输次数和/或第一定时器，确定释放第一HARQ进程。在又一种可能的设计中，所述装置还可以包括存储器，存储器，用于保存装置必要的计算机执行指令和数据。当该装置运行时，该处理器执行该存储器存储的该计算机执行指令，以使该装置执行如上述第八方面或者第八方面的任一种可能的设计所述的控制HARQ进程的方法。
第二十四方面，提供了一种计算机可读存储介质，计算机可读存储介质可以为可读的非易失性存储介质，该计算机可读存储介质中存储有指令，当其在计算机上运行时，使计算机执行第二十一方面、第二十一方面的任一种可能的设计所述的控制HARQ进程的方法。
第二十五方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，得计算机执行第二十一方面、上述方面的任一种可能的设计所述的控制HARQ进程的方法。
第二十六方面，提供了一种装置，该装置可以为第二终端装置或者第二终端装置中的芯片或者片上系统，该装置包括一个或多个处理器、一个或多个存储器。所述一个或多个存储器与所述一个或多个处理器耦合，所述一个或多个存储器用于存储计算机程序代码，所述计算机程序代码包括计算机指令，当所述一个或多个处理器执行所述计算机指令时，使所述装置执行第二十一方面或第二十一方面的任一可能的设计所述的控制HARQ进程的方法。
其中，第二十二方面至第二十六方面中任一种设计方式所带来的技术效果可参见上述第二十一方面和第二十一方面的任一种可能的设计所带来的技术效果，不再赘述。
第二十七方面，本申请实施例还提供一种通信系统，该通信系统可以包括如：第三方面至第七方面的任一方面所述的第一终端装置、如第十方面至第十四方面中任一方面所述的第二终端装置；或者，包括如第十六方面至第二十方面所述的第二终端装置，或者，包括如第二十二方面至第二十六方面中任一方面所述的第一终端装置。
附图说明
图1为现有收发两端对定时器理解不一致的示意图；
图2为本申请实施例提供的一种通信系统的架构示意图；
图3为本申请实施例提供的一种装置的组成示意图；
图4为本申请实施例提供的一种控制HARQ进程的流程示意图；
图5为本申请实施例提供的一种控制HARQ进程的流程示意图；
图6为本申请实施例提供的一种控制HARQ进程的流程示意图；
图7为本申请实施例提供的一种控制HARQ进程的流程示意图；
图8为本申请实施例提供的一种通信装置80的组成示意图；
图9为本申请实施例提供的一种通信装置90的组成示意图；
图10为本申请实施例提供的一种通信系统的组成示意图。
具体实施方式
在描述本申请实施例之前，对HARQ进程进行解释说明：
HARQ进程：是指发端向收端调度一次数据传输，再到发端接收到肯定应答ACK/否定应答NACK的处理过程。发端的HARQ操作可以包括新传TB和重传TB，接收并处理ACK/NACK；收端的HARQ操作可以包括接收TB，软合并处理，生成ACK/NACK。
一个或者多个HARQ进程组成一个HARQ实体(entity)。HARQ实体结合了停等协议，同时允许数据的连续传输。每个HARQ进程在一个传输时间间隔(transmission time interval，TTI)内处理一个传输块(transport block，TB)，每个HARQ进程在收端都需要独立的HARQ缓存(buffer)，以便对接收到的数据进行软合并。
发端、收端均配置有用于传输TB的HARQ进程，每个HARQ进程配置有一个定时器，该定时器可以用于限制HARQ进程的使用时间，当传输TB时，启动该HARQ进程关联的定时器，一旦该定时器超时或到达预设值，发端、收端便可以基于该HARQ进程传输其他TB。基于分组时延预算(packet delay budget，PDB)配置HARQ进程关联的定时器，但是，会存在如下问题：(1)发端、收端对定时器的停止时间理解不一致，导致收发两端停止定时器的行为未对齐。
例如，收端UE侧的定时器是由发端UE配置的，且发端UE启动发端对应的定时器，收端UE在接收到TB发送的配置定时器的命令时启动定时器，且该配置定时器的指令在发端UE向收端UE传输第一个TB时发送给收端UE。
若收端UE漏检发端UE配置定时器的命令，双方对于定时器的启动/重启时间未对齐，可能出现当发端UE侧的定时器停止，即不再给收端UE发送当前TB的情况下，收端UE的定时器仍处于工作状态，收端UE在定时器超时前仍然会认为发端UE会重传当前TB块，收端UE内的HARQ进程被锁定，无法被用于接收其他发端UE发送的sidelink传输。
以图1为例，图1为发端UE通过HARQ进程1向收端UE传输TB1的示意图，如图1所示，收端UE未接收到发端UE在前两次发送的TB1，收端UE在TB1的第三次重传才接受到定时配置信息，启动定时器，导致收端UE启动定时器的时间晚于发端UE启动定时器的时间，则收端UE在定时器超时前仍然会认为发端UE会重传当前TB块，HARQ进程1被锁定，无法被用于接收其他发端UE发送的sidelink传输。
为解决上述技术问题，本申请实施例提供一种控制HARQ进程的方法，该方法中，发端在某些情况下确定停止HARQ进程关联的定时器后，向收端发送指示信息，收端接收到 该指示信息后，可以根据该指示信息停止HARQ进程关联的定时器。又或者，收发两端基于相同的触发条件停止定时器。如此，使得收发两端对HARQ进程关联的定时器理解一致。具体的，该控制HARQ进程的方法可参照图4或图5对应的实施例中所述。
下面结合说明书附图，对本申请实施例的实施方式进行详细描述。
本申请实施例提供的控制HARQ进程的方法可用于支持V2X通信的任一通信系统，该通信系统可以为第三代合作伙伴计划(3rd generation partnership project，3GPP)通信系统，例如，长期演进(long term evolution，LTE)系统，又可以为第五代(5th generation，5G)移动通信系统、新无线(new radio，NR)系统、车与任何事物通信(vehicle-to-everything，V2X)系统以及其他下一代通信系统，也可以为非3GPP通信系统，不予限制。下面以图2为例，对本申请实施例提供的方法进行描述。
图2是本申请实施例提供的一种通信系统的示意图，如图2所示，该通信系统可以包括多个终端以及网络设备。终端可以位于网络设备的小区覆盖范围内，也可以位于网络设备的小区覆盖范围外。终端可以通过Uu口与网络设备相互通信，也可以通过侧行链路(sidelink，SL)(或者PC5口)与其他终端进行通信。终端可以通过单播方式与其他终端一对一通信，也可以通过组播方式或者广播方式与多个其他终端进行组播或者广播通信。例如，如图2所示，终端1可以与终端2进行单播通信，通过单播方式向终端2发送侧行数据。终端1可以与其他三个终端：终端3、终端4、终端5为一个组播组，终端1可以通过组播方式向终端3、终端4、终端5发送侧行数据。
其中，本申请所述的单播方式可以指：一个终端与另一个终端通过一对一的SL链路进行通信。广播方式可以指：一个终端向其周围广播消息，其他一个或者多个终端接收广播消息。多播方式可以指一个终端向多播群组中的一个或者多个终端发送数据/消息。
其中，图2中的网络设备可以是任意一种具有无线收发功能的设备，主要用于实现无线物理控制、资源调度和无线资源管理、无线接入控制以及移动性管理等功能。具体的，该网络设备可以为接入网(access network，AN)/无线接入网(radio access network，RAN)设备，还可以为由多个5G-AN/5G-RAN节点组成的设备，又可以为基站(nodeB，NB)、演进型基站(evolution nodeB，eNB)、下一代基站(generation nodeB，gNB)、收发点(transmission receive point，TRP)、传输点(transmission point，TP)、路边单元(road side unit，RSU)以及某种其它接入节点中的任一节点等，不予限制。
图2中的终端(terminal)可以称为终端装置(terminal equipment)或者用户设备(user equipment，UE)或者移动台(mobile station，MS)或者移动终端(mobile terminal，MT)等。具体的，图2中的终端可以是手机(mobile phone)、平板电脑或带无线收发功能的电脑。终端还可以是虚拟现实(virtual reality，VR)终端、增强现实(augmented reality，AR)终端、工业控制中的无线终端、无人驾驶中的无线终端、远程医疗中的无线终端、智能电网中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、车载终端、具有车对车(vehicle-to-vehicle，V2V)通信能力的车辆、智能网联车等等，不予限制。本申请实施例的终端以及网络设备都可以为一个或多个芯片，也可以为片上系统(system on chip，SOC)等。终端以及网络设备的具体组成部件可参照图3所示。
需要说明的是，图2仅为示例性附图，图2包括的设备的数量不受限制，且除图2所示设备之外，该通信架构还可以包括其他设备。此外，图2中各个设备的名称不受限制， 除图2所示名称之外，各个设备还可以命名为其他名称，不予限制。
在图2所示通信系统中，终端可以采用下述任一模式获取传输资源：模式一、网络设备调度的资源分配。该模式在LTE-V2X通信系统中可以称为mode3，在NR-V2X通信系统中可以称为mode1。模式一可以是终端需要在sidelink上向对端传输数据时，向网络设备发送请求，请求用于sidelink传输的资源；网络设备接收到终端的请求后，为终端分配sidelink传输资源。模式二、终端自主选择资源。该模式在LTE-V2X通信系统中可以称为mode4，在NR-V2X通信系统中可以称为mode2，模式二可以是网络设备为终端分配包括大量资源的资源池或者终端预配置有包括大量资源的资源池，多个终端可以通过自己感知调度或竞争的方式在该资源池中选择自身所需要的sidelink传输资源。
进一步的，终端或者称为发端通过模式一或者模式二获取到sidelink传输资源后，在获取到的sidelink传输资源上向对端发送数据，如：启动/重启HARQ进程关联的定时器，即解锁HARQ进程关联的定时器，在该HARQ进程关联的定时器的有效期内/运行期间，通过HARQ进程向对端发送TB，该TB复用一个或者多个逻辑信道(logic channel，LCH)上的数据。相对的，对端启动/重启HARQ进程关联的定时器，在该HARQ进程关联的定时器的有效期内/运行期间，接收到HARQ进程上传输的TB后，对接收到的TB进行处理，并将处理后的ACK/NACK反馈给发端。
需要说明的是，本申请实施例中，发端、收端为相对概念，发端可以指在sidelink上的某个HARQ进程上发送TB的终端或者终端装置，收端可以指在sidelink上的某个HARQ进程上接收TB的终端或者终端装置。下面以发端为第一终端装置、收端为第二终端装置为例，对本申请实施例提供的控制HARQ进程的方法进行描述。
其中，图2所示各设备，如：终端、网络设备，均可以采用图3所示的组成结构或者包括图3所示的部件。图3为本申请实施例提供的一种装置300的组成示意图，该装置300可以为终端或者终端中的芯片或者片上系统。如图3所示，该装置300包括处理器301，收发电路302以及总线303。进一步的，该装置300还可以包括存储器304。处理器301，存储器304以及收发电路302之间可以通过总线303连接。
应理解，本申请实施例所述的处理器，如：处理器301可以是中央处理器(central processing unit，CPU)、通用网络处理器(network processor，NP)、数字信号处理器(digital signal processing，DSP)、微处理器、微控制器、可编程逻辑器件(programmable logic device，PLD)专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。处理器301还可以是其它具有处理功能的装置，例如电路、器件或软件模块，不做限制。
收发电路302，用于与其他设备或其它通信网络进行通信。该其它通信网络可以为以太网，无线接入网(radio access network，RAN)，无线局域网(wireless local area networks，WLAN)等。收发电路302可以是模块、电路、收发器或者任何能够实现通信的装置。收发电路302可以用于接收程序指令并传输至所述处理器，或者，该收发电路302可以用于装置300与其他通信设备进行通信交互，比如交互控制信令和/或业务数据等。该收发电路302可以为代码和/或数据读写收发电路，或者，该收发电路302可以为通信处理器与收发机之间的信号传输收发电路。
总线303，用于在装置300所包括的各部件之间传送信息。
存储器304，用于存储指令。其中，指令可以是计算机程序。
其中，存储器304可以是只读存储器(read-only memory，ROM)或可存储静态信息和/或指令的其他类型的静态存储设备，也可以是随机存取存储器(random access memory，RAM)或可存储信息和/或指令的其他类型的动态存储设备，还可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或其他磁存储设备等，不予限制。
需要指出的是，存储器304可以独立于处理器301存在，也可以和处理器301集成在一起。存储器304可以用于存储指令或者程序代码或者一些数据等。存储器304可以位于装置300内，也可以位于装置300外，不做限制。处理器301，用于执行存储器304中存储的指令，以实现本申请下述实施例提供的控制HARQ进程的方法。
在一种示例中，处理器301可以包括一个或多个CPU，例如图3中的CPU0和CPU1。
作为一种可选的实现方式，装置300还包括输出设备305和输入设备306。示例性地，输入设备306是键盘、鼠标、麦克风或操作杆等设备，输出设备305是显示屏、扬声器(speaker)等设备。
作为一种可选的实现方式，该装置300还可以包括供电电路307，该供电电路307可以用于为该处理器301供电，该供电电路307可以与处理器301位于同一个芯片内，或者，位于处理器301所在的芯片之外的另一个芯片内。
本申请实施例所述的供电电路307包括但不限于如下至少一个：供电线路，供电子系统、电源管理芯片、功耗管理处理器或功耗管理控制电路。
需要指出的是，装置300可以是台式机、便携式电脑、网络服务器、移动手机、平板电脑、无线终端、嵌入式设备、芯片系统或有图3中类似结构的设备。此外，图3中示出的组成结构并不构成对该终端的限定，除图3所示部件之外，该终端可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。
例如，上述装置300可以为一个芯片系统，该芯片系统可以如图3所示，至少可以包括一个或者多个处理器和收发电路，涉及本申请实施例所述的方法的程序指令在该一个或者多个处理器中执行，以使得该芯片系统实现控制HARQ进程的方法。
此外，本申请的各实施例之间涉及的动作、术语等均可以相互参考，不予限制。本申请的实施例中各个设备之间交互的消息名称或消息中的参数名称等只是一个示例，具体实现中也可以采用其他的名称，不予限制。
需要说明的是，本申请实施例不限制执行方法的主体，该主体可以为终端也可以为终端中的功能模块，还可以为芯片系统等，不予限制，本申请实施例中以终端装置为例，对本申请实施例提供的方法进行描述。
下面以图2所示的架构为例，对本申请实施例提供的控制HARQ进程的方法进行描述。其中，下述实施例所述的终端装置可以具备图3所示部件。
图4为本申请实施例提供的一种控制HARQ进程的方法，该方法可以解决上述技术问题，如图4所示，该方法可以包括：
步骤401：第一终端装置确定通过第一HARQ进程传输的TB为最后一次传输的第一TB或者是新传TB，或者，通过第一HARQ进程传输的第一TB的次数达到最大传输次数，停止第一定时器。
其中，第一终端装置可以图2中的任一终端或者任一终端中的功能模块或者芯片系统，第一终端装置可以与第二终端装置进行sidelink通信，通过第一HARQ进程向第二终端装置传输TB，第二终端装置可以为图2中接收第一终端装置通过通过第一HARQ进程传输的TB的任一终端或者任一终端中的功能模块或者芯片系统，不予限制。例如，第一终端装置可以为图2中的终端1，第二终端装置可以为图2中的终端2。
其中，第一HARQ可以为第一终端装置中的任一HARQ进程，第一终端装置可以通过第一HARQ进程传输第一TB，第一TB可以复用一个或者多个LCH上的数据，即一个或者多个LCH上的数据可以携带在第一TB中经第一HARQ进程处理后传输出去。其中，本申请实施例中，第一终端装置通过第一HARQ进程传输第一TB可以指：第一终端装置生成第一TB后，将第一TB和/或与该TB关联的资源信息和HARQ信息递交给第一HARQ进程处理，并将处理后的第一TB通过与第一HARQ进程对应或者与该TB对应的sidelink传输资源发送给第二终端装置。HARQ信息可以包括但不限于HARQ反馈使能(enable)/去使能(disable)、冗余版本等。HARQ实体处理TB的过程可参照现有技术，不予赘述。
需要说明的是，本申请各实施例所述的TB还替换为媒体接入控制协议数据单元(media access control protocol data unit，MAC PDU)或者其他粒度的数据包，不予限制。
其中，第一HARQ进程可以可以与第一定时器(timer)关联/对应，由第一终端装置维护第一定时器，例如，由第一终端装置触发第一定时器的开启/重启、停止等。第一定时器可以用于限定第一终端装置通过第一HARQ进程发送第一TB的时长或者第一终端装置使用第一HARQ进程发送第一TB的时长，该时长可以为通过第一HARQ进程多次发送第一TB的总时长，也可以用于限制每一次传输第一TB的时长。在第一定时器运行期间/有效期内，可选的，第一终端装置可以通过第一HARQ进程重复发送第一TB，在第一定时器超时/停止的情况下，第一终端装置停止通过第一HARQ进程发送第一TB。例如，配置第一定时器的时长为[t1，t2]，则在第一定时器启动后的[t1，t2]这一时间段内，第一终端装置可以通过第一HARQ进程发送多个第一TB。
需要说明的是，第一定时器不限于与第一HARQ进程关联，还可以与第一终端装置内的其他一个或者多个HARQ进程关联/对应。例如，定时器1可以与HARQ进程1、HARQ进程2关联，可以同时限定通过HARQ进程1以及通过HARQ进程2传输TB的时长。
其中，最大传输次数可以指预设的传输第一TB的最大次数，最大传输次数还可以称为传输第一TB的最大次数或者第一TB的最大传输次数。最大传输次数可以预先配置，其中，预先配置是第一终端装置出厂时即配置好的，后续可以被更改的；或者，最大传输次数可以是协议规定的固定取值，如：取值为固定值N，N为大于或等于1的整数；或者，最大传输次数由网络设备配置给第一终端装置等等，不予限制。
示例性的，第一终端装置将第一TB的发送次数/发送第一TB的次数的初始值记录为0，后续，第一终端装置开始向第二终端装置发送第一TB后，每发送一次第一TB，将第一TB的发送次数加1，其中，应理解的是，仅当第一终端装置通过第一HARQ进程发送第一TB后，发送次数加1；或者，只要第一终端装置通过第一HARQ进程发送第一TB， 不限制是否始终通过第一HARQ进程发送，将第一TB的发送次数加1。
假设最大发送次数为N，N为大于或等于1的整数，若第一终端装置记录的第一TB的发送次数等于N，则确定通过第一HARQ进程传输的第一TB的次数达到最大传输次数，预示第一终端装置已通过第一HARQ进程传输完多个第一TB，可以停止第一定时器。若第一终端装置记录的第一TB的发送次数等于N-1，则确定第一终端装置通过第一HARQ进程传输的TB为最后一次传输的第一TB或者第一终端装置将进行最后一次第一TB的传输，第一终端装置此次传完第一TB后，多个第一TB已传输完毕，可以停止第一定时器。
其中，新传TB可以指通过第一HARQ进程传输的新的TB，新传TB不同于第一TB。相对于新传TB，第一TB可以称为旧的TB或者当前TB，不予限制。
示例性的，若第一终端装置多次传完第一TB后，接收到来自网络设备的新传指示，该新传指示可以用于指示第一终端装置向第二终端装置发送第二TB，或者，根据新传指示确定通过第一HARQ进程传输第二TB，或者，根据新传指示确定通过第一HARQ进程执行新传，或者根据新传指示第一HARQ进程与第二资源关联，第二资源可以不同于传输第一TB的对应资源，如：第二资源可以为用于传输第二TB的sidelink资源，或者，第一终端装置/第一终端装置的高层(例如无线资源控制(radio resource control，RRC)层)确定通过第一HARQ进程传输第二TB，即新传TB，则表示第一TB已全部传输完毕，不需要使用第一定时器限制通过第一HARQ进程传输第一TB的时间，此时，第一终端装置可以停止第一定时器。
本申请实施例中，第一终端装置停止第一定时器可以指第一终端装置停止第一终端装置维护/第一终端装置内配置的第一定时器，或者，停止为第一HARQ进程配置的第一定时器，停止第一定时器可以指第一定时器失效，停止通过第一HARQ进程传输第一TB或者不再通过第一HARQ进程传输第一TB。
需要说明的是，步骤401中，第一终端装置可以在确定通过第一HARQ进程传输的TB为最后一次传输的第一TB或者是新传TB，或者，通过第一HARQ进程传输的第一TB的次数达到最大传输次数之时或者之后的某个时间点，停止第一定时器，不予限制。
进一步的，可选的，第一终端装置可以开启第二定时器，该第二定时器与第一HARQ进程关联，用于限定通过第一HARQ进程重复传输第二TB的时长。所述第二HARQ定时器可以与第一HARQ定时器相同，也可以不同。或者，第一终端设备可以根据新传TB对应的调度信息重新配置第一定时器，并重启第一定时器，即第一定时器按照新传TB对应的定时器时长开始运行。
步骤402：第一终端装置向第二终端装置发送第一指示信息。
一种示例中，当第一终端装置确定通过第一HARQ进程传输的TB为最后一次传输的第一TB，停止第一定时器时，第一指示信息可以用于指示通过第一HARQ进程传输的TB为最后一次传输的第一TB。可替换的，第一指示信息还可以用于指示第一终端装置释放第一HARQ进程，或者，用于指示第二终端装置释放与第一HARQ进程关联的进程，如：第一HARQ进程关联的第二HARQ进程，或者，用于指示第二终端装置释放与第一TB关联的HARQ进程。
又一种示例中，当第一终端装置确定通过第一HARQ进程传输的TB为新传TB时，第一指示信息可以用于指示通过第一HARQ进程传输的TB为新传TB。
在该示例中，第一终端装置通过第一HARQ进程向第二终端装置发送TB之前，第一终端装置可以将第一指示信息携带在侧行链路控制信息(sidelink control information，SCI)中发送给第二终端装置，该SCI可以称为侧行链路反馈控制信息(sidelink feedback control information，SFCI)，该SCI可以调度通过第一HARQ传输的TB，该SCI可以用于指示传输TB的时频资源位置。
再一种示例中，当第一终端装置确定通过第一HARQ进程传输的第一TB的次数达到最大传输次数，停止第一定时器时，第一指示信息可以用于指示通过第一HARQ进程传输的第一TB的次数达到最大传输次数。
在该示例中，第一终端装置可以在通过第一HARQ进程向第二终端装置发送完最后一次第一TB之前或者之后，将第一指示信息携带在SCI或者其他控制信息中发送给第二终端装置。例如，第一指示信息可以携带在第一SCI中，也可以携带在第二SCI中，第一SCI与第二SCI中包含的信息不同和/或格式不同。第一SCI可以用于调度最后一次发送的第一TB，第一SCI在发送第一TB之前发送，第二SCI可以在发送第一SCI或者发送最后一次第一TB之后发送。如：第一终端设备在发送第一TB之前，先向第二终端装置发送第一SCI，第一SCI中携带有第一指示信息；或者，进一步可选地，第一终端装置向第二终端装置发送第一SCI之后，再发送第二SCI，第二SCI携带有第一指示信息。
一种示例中，以第一指示信息携带在第一SCI中为例，例如，第一指示信息可以为第一SCI中的一比特字段，该比特字段的取值可以为二进制比特数“0”或者“1”，0”表示未达到到最大传输次数，“1”表示达到最大传输次数。假设第一TB的最大传输次数为N，当第一终端装置确定第K次传输第一TB，K<N时，用于调度第一TB的第一SCI中该字段的取值为“0”；当第一终端装置确定第N次传输第一TB，达到最大传输次数时，第一SCI中该字段的取值为“1”。
又一种示例中，还可以在每次发送用于调度第一TB的SCI时，在该SCI中携带第一TB的最大传输次数和/或用于指示本次SCI调度的是第几个第一TB的指示信息。例如，假设第一终端设备需要向第二终端设备发送第一TB，且第一TB的最大传输次数为N，则第一终端设备在初传第一TB时，在初传第一TB对应的SCI中指示最大传输次数N以及比特数“1”，通过比特数“1”指示是初传或者是第一次传输；后续，第一终端设备在第一次重传第一TB，即第二次传输第一TB时，在重传SCI中指示“2”，表示本次为第一次重传/第二次传输第一TB。此外，本示例方案中所述的通过SCI指示最大传输次数和/或第几次传输的第一TB的方案可以不依赖于图4所示的第一终端装置、第二终端装置维护定时器这一应用场景，即通过SCI指示最大传输次数和/或第几次传输的第一TB可以作为与图4所示维护定时器的方案并行的方案，单独执行。
步骤403：第二终端装置接收第一指示信息，根据第一指示信息，停止第二定时器。
其中，第二定时器为第二终端装置维护的定时器，第二定时器可以用于限定第二终端装置通过第二HARQ进程接收第一TB的时长或者第二终端装置使用第二HARQ进程接收第一TB的时长，该时长可以为通过第一HARQ进程多次发送第一TB的总时长，也可以用于限制每一次接收第一TB的时长。在第二定时器运行期间/有效期内，第二终端装置可以通过第二HARQ进程接收处理第一TB，可选的，和/或反馈第一TB对应的ACK/NACK，第二定时器超时/停止，则第二终端装置停止通过第二HARQ进程接收第一TB。
其中，可选的，终端设备将第二HARQ进程与第一HARQ关联/对应，或者，第二HARQ进程与第一TB相关，第二HARQ进程用于接收第一TB。第二HARQ进程的标识(indentifier，ID)可以与第一HARQ进程的ID相同，也可以不同，不予限制。本申请实施例中，HARQ进程的ID可以唯一标识一个HARQ，HAQR进程的ID还可以称为HARQ进程号。
示例性的，第二终端装置可以接收来自第一终端装置的SCI，该SCI可以用于调度第一终端装置向第二终端装置发送的第一TB，当该SCI中包括用于指示第一HARQ进程的ID的信息或者第一HARQ进程的ID时，第二终端装置确定第一终端装置会通过第一HARQ进程向第二终端装置发送第一TB，第二终端装置会在第二终端装置自己维护的至少一个HARQ进程中选择一个空闲的进程，如：第二HARQ进程，接收该SCI调度的第一TB。进一步的，第二终端装置可以保存第二HARQ进程与第一HARQ进程的关联关系，后续，一旦第二终端装置确定第一终端装置通过第一HARQ进程向第二终端装置发送第一TB，第二终端装置就根据该关联关系通过第二HARQ进程接收第一TB。
其中，第一终端装置每次通过第一HARQ进程向第二终端装置发送第一TB之前，会向第二终端装置发送用于调度本次发送的第一TB的SCI，SCI中包括用于指示第一HARQ进程的ID的信息或者第一HARQ进程的ID，和/或新传指示字段，第二终端装置可以根据用于调度本次发送的第一TB的SCI确定第一终端装置通过第一HARQ进程向第二终端装置发送第一TB。例如，当第一终端设备给第二终端设备发送TB1对应的SCI，然后向第二终端设备发送发送TB1；之后，第一终端设备给第二终端设备发送TB2对应的SCI，然后向第二终端设备发送发送TB2，如第二终端设备确定TB2对应的SCI中指示的HARQ进程标识与TB1对应的SCI中指示的HARQ进程标识相同，并且新传指示(new data indicator，NDI)没有翻转，则认为TB1与TB2相同，即均为第一TB。
示例性的，第二终端装置根据第一指示信息，停止第二定时器可以包括：第二终端装置根据第一指示信息，确定第二终端装置通过第一HARQ进程关联的第二HARQ进程接收到的TB为最后一次传输的第一TB或者是新传TB，或者，通过第二HARQ进程接收到的第一TB的次数达到最大传输次数，停止第二定时器；或者第二终端装置成功解码第一TB，停止第二定时器；或者，第二终端装置生成第一TB的HARQ反馈(ACK或者NACK)，停止第二定时器，或者，第二终端装置指示第一TB的HARQ反馈(ACK或者NACK)，停止第二定时器。
其中，第二终端装置停止第二定时器可以指第二终端装置停止第二终端装置维护/第二终端装置内配置的第二定时器，停止第二定时器可以指第二定时器失效，停止通过与第一HARQ进程关联的第二HARQ进程接收第一TB或者不再通过第一HARQ进程关联的第二HARQ进程接收第一TB。
可替换的，在图4所示方法中，第一终端装置还可以在停止第一定时器后，直接通知第二终端装置停止第二HARQ进程关联的第二定时器，以便第二终端装置直接根据第一终端装置的通知停止第二HARQ进程关联的第二定时器，无需根据第一指示信息确定通过第二HARQ进程接收的TB满足一定条件(如：接收到的TB为最后一次传输的第一TB或者接收到第一TB的次数达到最大传输次数或者接收到的TB为新传TB等)时，再停止第二定时器。
基于图4所示方法，在第一终端装置通过第一HARQ进程发送的TB满足一定条件时， 第一终端装置停止第一HARQ进程关联的第一定时器，并通过第一指示信息，将通过第一HARQ进程发送TB的情况告知第二终端装置，以便于第二终端装置根据第一指示信息的指示，获知第一终端装置发送TB的情况，根据第一终端装置发送TB的情况停止第二终端装置中的第二定时器。如此，使收发两端基于相同的触发事件(event)停止各自维护的与HARQ进程关联的定时器，对齐收发两端停止各自维护的与HARQ进程关联的定时器的行为，避免因收发两端对各自维护的与HARQ进程关联的定时器的停止时间理解不一致，导致收端的HARQ被锁定不能用于传输其他TB，资源浪费的问题。
除图4所示方法之外，第一终端装置、第二终端装置还可以根据TB传输时的失败次数停止各自维护的定时器。具体的，该方法可以参照图5所示：
图5为本申请实施例提供的又一种控制HARQ进程的方法，该方法可以解决上述技术问题，如图5所示，该方法可以包括：
步骤501：第一终端装置通过第一HARQ进程向第二终端装置发送第一TB。
步骤502：第二终端装置接收第一TB，对第一TB进行处理，可选地，向第一终端装置反馈第一TB的ACK/NACK。
步骤503：可选的，第一终端装置接收第一TB对应的ACK/NACK。
在第一TB的传输次数未达到最大传输次数之前，第一终端装置可选的重复执行步骤501、步骤503，直至步骤504，第一终端装置重复执行步骤502，直至步骤505。
步骤504：可选的，第一终端装置确定接收到NACK的次数等于或超过M次，停止第一定时器。
其中，M为大于或者等于1的整数，NACK可以用于指示所述第二终端装置未正确接收到通过第一HARQ进程传输的第一TB。M可以由第一终端装置配置，并由第一终端装置配置给/通知给第二终端装置。
当NACK的次数等于或超过M次时，表示通过第一HARQ进程传输第一TB的失败次数过多，可能不适宜通过第一HARQ进程传输第一TB，则停止第一HARQ进程相关联/相对应的第一定时器。
步骤505：可选的，第二终端装置确定反馈NACK的次数超过M次，停止第二定时器。
基于图5所示方法，第一终端装置可以在第一TB对应的NACK次数达到一定数值时，停止第一定时器，第二终端装置可以在第一TB对应的NACK次数达到一定数值时，停止第二定时器。如此，使得收发两端端均基于NACK次数各自维护的HARQ进程关联的定时器，对齐收发两端停止各自维护的与HARQ进程关联的定时器的行为，避免因收发两端对各自维护的与HARQ进程关联的定时器的停止时间理解不一致，导致收端的HARQ被锁定不能用于传输其他TB，资源浪费的问题。
上述步骤401～步骤403或者步骤501～步骤505对第一终端装置停止第一HARQ进程关联的第一定时器、第二终端装置停止第二HARQ进程关联的第二定时器的行为进行了描述。此外，本申请实施例还涉及第一终端装置维护第一定时器的其他行为，如：停止第一定时器后的行为、配置第一定时器、启动/重启第一定时器、以及第一终端装置在第一定时器运行期间的行为。具体的，这些行为可参照下述第一个实施方式～第四个实施方式所述：
第一个实施方式，涉及第一终端装置停止第一定时器后的行为：
进一步的，在第一终端装置停止第一定时器时或者之后，第一终端装置还可以执行下 述过程：第一终端装置释放第一HARQ进程，和/或，第一终端装置向网络设备发送释放通知。
需要说明的是，本申请实施例中，在某个事件发生时可以指在该事件发生的同时，也可以指在该事件发生之后，如：在该事件发生之后的某个时间预设点，不予限制。例如，在第一定时器超时时可以包括：在第一定时器超时的同时，或者，在第一定时器超时之后，或者在第一定时器超时之后的某个时间点，不予限制。又例如，本申请所述的当接收到新传指示时可以包括当接收到新传指示的同时，或者，在接收到新传指示之后，不予限制。
其中，释放通知可以用于通知网络设备释放第一HARQ或者用于通知网络设备释放用于传输第一TB的sidelink传输资源，或者用于通知网络设备第一HARQ进程可用，第一TB可以为通过第一HARQ进程传输的TB。需要说明的是，第一终端装置向网络设备发送释放通知可以在上述模式一下执行或者在上述模式二下执行，不予限制。第一终端设备可以通过触发连接建立或者链接重建，以向网络设备发送该释放通知。
其中，第一终端装置释放第一HARQ进程还可以称为第一终端装置解锁第一HARQ进程，停止通过第一HARQ传输第一TB，将第一HARQ进程处于空闲状态或者允许通过第一HARQ进程传输其他TB。需要说明的是，第一终端装置释放第一HARQ进程可以在上述模式一或者模式二场景下执行，不予限制。
进一步的，第一终端装置还可以清空第一终端装置内与第一HARQ进程关联的buffer，或者用新的数据或TB或MAC PDU覆盖第一HARQ进程关联的buffer。
需要说明的是，第一个实施方式所描述的行为还适用于第一定时器超时的场景，即第一定时器超时后，第一终端装置可以如第一个实施方式所述：释放第一HARQ进程，和/或，向网络设备发送释放通知。
基于第一个实施方式，第一终端装置可以在停止第一定时器后，及时释放通过第一HARQ进程传输的第一TB所对应的sidelink传输资源，避免资源浪费。
第二个实施方式，涉及如何配置第一HARQ关联的第一定时器。示例性的，可以通过下述方式(1.1)或者方式(1.2)配置第一终端装置内第一HARQ关联的第一定时器以及第一定时器的相关参数，第一定时器的相关参数至少可以包括第一定时器的时长，还可以包括触发第一定时器启动/重启的事件、触发第一定时器停止的事件等：
方式(1.1)、由第一终端装置配置第一定时器以及第一定时器的时长。
其中，第一定时器的时长可以根据通过第一HARQ进程传输第一TB的次数确定，也可以根据第一TB复用的LCH的相关参数确定。
以第一定时器的时长根据第一TB复用的LCH的相关参数确定为例，预配置或者网络设备为每一个LCH配置第一参数，例如网络谁被通过专用信令或者系统消息为第一终端设备配置LCH或者RB时，在配置中提供用于确定第一定时器时长的第一参数，即，第一参数用于指示LCH关联的定时器时长，其中，LCH还可以替换为无线承载(radio bearer，RB)。第一TB可以复用一个或者多个逻辑信道LCH的数据，第一定时器的时长可以等于一个或者多个LCH中，优先级最高的LCH对应的第一参数，或者，第一定时器的时长等于一个或者多个LCH对应的第一参数中取值最小的第一参数。
其中，LCH对应的第一参数可以为与LCH关联的定时器的时长，LCH对应的第一参数的配置是预配置参数或者由网络设备配置。例如，LCH对应的第一参数可以在网络设备 与第一终端装置建立无线资源控制(radio resource control，RRC)连接时，由网络设备通过RRC信令预先配置给第一终端装置，也可以在网络设备与第一终端装置建立RRC连接后，由网络设备通过动态信令或者物理层信令配置或者系统信息(如：系统信息块(system information blocks，SIBs)给第一终端装置，不予限制。
方式(1.2)、第一定时器以及第一定时器的时长是预配置参数或者由网络设备配置。
该方式(1.2)中，网络设备可以根据第一TB的最大传输次数确定第一定时器的时长。当网络设备与第一终端装置建立RRC连接时，网络设备可以通过RRC信令将第一定时器以及第一定时器的时长预先配置给第一终端装置，也可以在网络设备与第一终端装置建立RRC连接后，由网络设备通过动态信令或者物理层信令或者系统信息配置给第一终端装置，不予限制。
基于第二个实施方式，可以由第一终端装置配置第一定时器，也可以由网络设备配置第一终端装置内的第一定时器。
第三个实施方式，涉及第一终端装置在什么样的条件下启动/重启第一定时器。具体的，第一终端装置可以在下述事件一～事件四中任一种事件的触发下，启动/重启第一定时器：
事件一、第一终端装置接收到新传指示，启动或重启第一定时器。
其中，新传指示可以用于指示第一终端装置通过第一HARQ进程新传第一TB，或者，该新传指示可以用于指示第一终端装置通过第一HARQ进程传输第一个第一TB，或者，该新传指示可以用于指示第一终端装置通过第一HARQ进程开始传输第一TB。
其中，该新传指示可以携带在DCI或者媒体接入控制控制单元(media access control，MAC CE)中。例如，网络设备可以将新传指示携带在DCI中发送给第一终端装置，或者，第一终端装置的MAC生成第一TB后，将指示物理层第一TB的传输为新传。本申请实施例中，启动第一定时器还可以描述为重启第一定时器，启动第一定时器可以指：使能第一定时器开始工作，从0开始计时，直至第一定时器被迫停止或者第一定时器的计时时长达到第一定时器的时长，即第一定时器超时，停止计时；或者直到重新启动。
事件二、第一终端装置接收到第二终端装置发送的NACK，启动或重启第一定时器。
其中，NACK用于指示第二终端装置未正确接收到第一TB或者第二终端装置未成功解码第一TB。需要说明的是，本申请实施例中，第二终端装置未正确接收到第一TB可以指：第二终端装置未成功解码或接收到第一TB。
其中，事件二中NACK可以为第二终端装置发送的第一个NACK，也可以为第X个NACK，X为大于或者等于2的整数，不予限制。
可以理解的是，可选的，在仅反馈ACK的机制下，事件二还可以替换为第一终端装置未接收到第二终端装置反馈的ACK，则启动或重启第一定时器。
事件三、第一终端装置确定通过第一HARQ进程向第二终端装置重传第一TB，启动或者重启第一定时器。
其中，事件三可以替换为第一终端装置指示第二HARQ进程触发重传后，启动或重启第一定时器；或者，第一终端装置从封装与复用实体获取到MAC PDU后，启动或重启第一定时器；或者，第一终端装置接收到网络设备调度的重传资源，启动或重启第一定时器；
示例性的，若第一终端装置接收到第二终端装置反馈的NACK，则确定重传第一TB，或者，在仅反馈ACK的机制下，若第一终端装置未接收到第二终端装置反馈的ACK，则 确定重传第一TB。
事件四、第一终端装置接收来自网络设备的重启指示，根据重启指示启动第一定时器。
其中，重启指示可以用于指示重启第一定时器。
示例性的，网络设备可以在接收到第一终端装置发送的用于请求传输第一TB的sidelink资源后，向第一终端装置分配sidelink资源时，向第一终端装置发送重启指示。
事件五、第一终端向网络设备发送ACK或NACK反馈，启动或者重启第一定时器。
其中，所述ACK或NACK对应于第一终端设备接收到的来自第二终端设备的ACK或NACK，或者，在未接收到第二终端设备反馈的NACK或ACK的情况下对应的反馈。例如，当第二终端设备反馈仅需反馈NACK的情况下，若第一终端设备未接收到第二终端设备反馈的NACK，则向网络设备反馈ACK。
其中，事件五可以替换为，第一终端生成向网络设备发送的ACK或NACK反馈，启动或者重启第一定时器。
示例性的，若第一终端装置接收到第二终端装置反馈的NACK，则确定需要重传第一TB，并向网络设备反馈NACK以请求重传资源，或者，在仅反馈ACK的机制下，若第一终端装置未接收到第二终端装置反馈的ACK，则确定需要重传第一TB，并向网络设备反馈NACK以请求重传资源。
第四个实施方式，涉及第一终端装置在第一定时器运行期间的行为。具体包括：
若第一定时器未超时和/或第一TB的次数未达到最大传输次数、第二终端装置未正确接收到第一TB和/或用于传输第一TB的资源小于预设阈值，和/或，无预留资源，和/或，在配置了重复的前提下，无剩余的(即无可用的)重复资源，则第一终端装置获取用于传输第一TB的资源；或者，
若第一定时器未超时，第一TB的次数未达到最大传输次数，用于传输第一TB的资源小于预设阈值，第一终端装置获取新的用于传输第一TB的资源。
其中，用于传输第一TB的资源可以指用于传输第一TB的sidelink资源或者第一TB的sidelink传输资源。
其中，预设阈值可以根据需要进行设置，不予限制。若用于传输的第一TB的资源小于预设阈值，则表示可用的sidelink资源不足以传输全部的第一TB，需要更多的sidelink资源传输第一TB；反之，若用于传输第一TB的资源大于或等于预设阈值，则表示存在能够传输全部的第一TB的sidelink资源。
其中，第一终端装置可以采用上述模式一或者模式第二获取传输第一TB的资源或者传输第一TB的sidelink资源。例如，第一终端装置获取新的用于传输第一TB的资源，可以包括：第一终端装置从网络设备获取用于传输第一TB的资源；或者，第一终端装置自主选择用于传输第一TB的资源。
对于不支持HARQ反馈，例如侧行链路广播通信，或支持但未使能(disable)HARQ反馈的情况，例如侧行链路组播单播通信中未使能(disable)HARQ反馈的情况，第一终端设备每次传输第一TB后，根据上述条件判断是否需要获取用于传输第一TB的资源，即是否需要预留资源或者是否需要向基站请求资源；
对于支持HARQ反馈且使能(enable)HARQ反馈的情况，例如侧行链路组播单播通信中使能(enable)HARQ反馈的情况，第一终端设备可以判断当接收到来自第二终端设 备发送的HARQ反馈为NACK时，根据上述条件判断是否需要获取用于传输第一TB的资源，即是否需要预留资源或者是否需要向基站请求资源。
基于第四个实施方式，第一终端装置可以在定时器运行期间和/或者第一TB的传输次数未达到最大传输次数，但用于传输第一TB的资源不够用的情况下，请求新的用于传输第一TB的sidelink资源，或者，触发资源重选，在预配置或者网络设备配置的资源池中选择资源，保证第一TB的正常传输。
需要说明的是，本申请实施例中，不限于第一定时器超时后，清空第一HARQ进程关联的buffer，还可以在发送第一TB成功或者其他情况下，清空第一HARQ进程关联的buffer，具体如下所述：
第一终端装置接收到第二终端装置反馈的ACK，或者，接收来自网络设备的新传指示，或者，通过第一HARQ进程，向第二终端装置成功发送最后一次传输的第一TB后，清空第一HARQ进程关联的缓存buffer，或者，用第二TB覆盖第一HARQ进程关联的buffer。
其中，ACK用于指示第二终端装置正确接收到第一终端装置通过第一HARQ进程传输的第一TB。新传指示用于指示第一终端装置通过第一HARQ进程传输新的TB。
进一步的，清空第一HARQ进程关联的buffer后，第一终端装置通过第一HARQ进程发送第二TB，并将第二TB存储到第一HARQ关联的buffer中，便于后续重传第二TB。
以上对第一终端装置维护第一定时器的其他行为进行了描述，除此之外，本申请实施例还涉及第二终端装置维护第二定时器的行为，如：配置第二定时器、启动/重启第二定时器、第二终端装置在第二定时器运行期间的行为以及停止第二定时器后的行为。具体的，这些行为可参照下述第五个实施方式～第六个实施例方式中所述：
第五个实施方式，涉及如何配置第二HARQ关联的第二定时器。具体的，可以通过方式(2.1)或者方式(2.2)配置第二终端装置内的第二定时器以及第二定时器的相关参数，第二定时器的相关参数至少可以包括第二定时器的时长，还可以包括触发第二定时器启动/重启的事件、触发第二定时器停止的事件等：
方式(2.1)、由第一终端装置为第二终端装置配置第二定时器。
示例性的，第一终端装置可以根据第一定时器的时长等参数给第二终端装置配置第二定时器。具体的，第一终端装置可以通过SCI将第一定时器以及第一定时器的时长配置给第二终端装置。例如，第一终端装置可以将用于指示第二终端装置配置第二定时器的指示信息以及第一定时器的相关参数携带在SCI中发送给第二终端装置。
或者，第一终端装在每次传输第一TB的SCI中，指示第二定时器的时长配置，并且每次SCI中指示的定时器的时长可以相同可以不同，即SCI中指示的第二定时器的时长为传输第一TB的剩余时间，或者为第一定时器的剩余运行时间。例如，第一终端设备传输第一TB对应的第一HARQ进程关联的第一定时器的时长为10ms，当第一终端装置即将第Q次传输第一TB，Q为大于或等于1的整数时，第一定时器已经运行5ms，即剩余运行时间为5ms，则第一终端设备在第Q次传输第一TB的SCI中，将配置第二定时器的时长参数设置为5ms。第二终端设备接收到该SCI后，将第二定时器重新设置时长为5ms并重启第二定时器。
其中，第一定时器的时长的确定方式可参照上述方式(1.1)中所述，不予赘述。第二定时器的时长可以与第一定时器的时长相同，也可以不同，不予限制。
方式(2.2)、第二定时器以及第二定时器的时长是预配置参数或者由网络设备配置。
该方式(2.2)中，网络设备可以根据第一TB的最大传输次数确定第二定时器的时长。
该方式(2.2)中，第一终端装置、第二终端装置处于网络设备的覆盖区域。当网络设备可以在与第二终端装置建立RRC连接时，网络设备通过RRC信令将第二定时器以及第二定时器的时长预先配置给第二终端装置，也可以在与第二终端装置建立RRC连接后，由网络设备通过动态信令或者物理层信令配置或者系统信息给第二终端装置，不予限制。
方式(2.3)、由第二终端装置配置第二定时器以及第二定时器的时长。
例如，第二终端装置可以根据第一TB的最大传输次数确定第二定时器的时长，还可以根据第一TB复用的QoS(例如PDB)的相关参数确定第二定时器的时长，不予限制。具体的，该确定方式可参照上述方式(1.1)中所述。
基于第五个实施方式，可以由第一终端装置配置第二定时器，并将第二定时器的时长通知给第二终端装置，也可以由网络设备集中配置第二终端装置内的第二定时器，如此，使得第一终端装置、第二终端装置内第二定时器的时长或者其他相关参数是相同，保证第一终端装置、第二终端装置对第二定时器的理解一致性。
第六个实施方式，涉及第二终端装置在什么样的条件下启动/重启第二定时器。具体的，第二终端装置可以在下述事件五或者事件六的触发下，启动/重启第二定时器：
事件五，第二终端装置接收配置信息，根据配置信息重新配置和/或启动或重启第二定时器。
其中，配置信息可以用于指示第二终端装置启动第一HARQ进程关联的第二HARQ进程所对应第二定时器，或者，用于指示第一终端装置已启动第一HARQ进程关联的第一定时器，或者，用于指示第一终端装置开始通过第一HARQ进程向第二终端装置传输第一TB，或者用于指示配置或者重新配置第二定时器。该配置信息可以在第一终端装置根据上述事件一～事件三中任一事件启动第一定时器后，由第一终端装置发送给第二终端装置。
其中，事件五可以替换为，第二接收终端接收到第一接收终端发送的新传指示，启动或者重启，和/或重配定时器；
或者，指示物理层对第一TB的数据生成非确认反馈(例如NACK)，启动或者重启和/或重配定时器；
或者，发送第一TB对应的非确认反馈(例如NACK)，启动或者重启和/或重配定时器；
或者，指示物理层将接收到的数据与缓存器中的数据进行合并，或指示物理层解码第一TB，启动或者重启和/或重配定时器；
事件六，第二终端装置接收来自网络设备的重启指示，根据重启指示启动第二定时器。
其中，重启指示如上述事件四中所述。需要说明的是，本申请实施例中，网络设备可以同时向第一终端装置、第二终端装置发送重启指示。
基于第三个实施方式，可以由第一终端装置开启/重启第二定时器后，通知第二终端装置开启/重启第二定时器，也可以由网络设备集中通知第一终端装置、第二终端装置开启/重启第二定时器，如此，使第一终端装置、第二终端装置对齐开启/重启第二定时器的时间。
第七个实施方式，涉及第二终端装置在第二定时器运行期间的行为。具体包括：
在第二定时器运行期间，可选的，第二终端装置向第一终端装置反馈第一TB对应的 反馈信息，其中，反馈信息包括ACK或者NACK；即第二终端装置发送/或者指示或者生成第一TB对应的反馈信息前，需要判断第二定时器是否正在运行，若是，则执行所述操作，发送/或者指示或者生成第一TB对应的反馈信息，否则，不生成/不指示/不发送第一TB对应的反馈信息。或者，
在第二定时器运行期间，第二终端装置对第二HARQ进程相关联的buffer中的TB进行合并处理，即第二终端装置发送/或者指示或者生成第一TB对应的反馈信息时，需要判断第二定时器是否正在运行，若是，则执行所述操作，对第二HARQ进程相关联的buffer中的TB进行合并处理，发送/或者指示或者生成第一TB对应的反馈信息，否则，不生成/不指示/不发送第一TB对应的反馈信息。
基于第七个实施方式，第二终端装置可以在第二定时器运行期间，正常反馈第一TB对应的ACK/NACK，或者，对第二HARQ进程关联的buffer中的第一TB进行合并处理，以提高第一TB的传输可靠性。
第八个实施方式，涉及第二终端装置停止第二定时器后，第二终端装置的行为。具体包括：第二终端装置清空第二HARQ进程相关联的buffer，或者用新的数据或者TB覆盖第二HARQ进程关联的buffer，停止通过第二HARQ进程接收第一TB/释放第二HARQ进程。
进一步的，第二终端装置可以通过第二HARQ进程接收其他TB，如：第二TB。
其中，第二终端装置清空第二HARQ进程关联的buffer可以指：第二终端装置将第二定时器运行期间，第二HARQ进程关联的buffer中的TB从buffer中删除(delete)/清除。第二终端装置清空第二HARQ进程关联的buffer还可以替换为第二终端装置覆盖第二HARQ进程关联的buffer，如：第二定时器超时后，第二终端装置不清空第二HARQ进程关联的buffer，而是当第二终端装置再次通过第一HARQ进程接收到其他新的TB，如：第二TB时，用接收到的第二TB覆盖/替换/更新第二HARQ进程关联的buffer中的TB。
基于第八个实施方式，第二终端装置停止第二定时器后，及时清空第二HARQ进程关联的buffer，释放第二HARQ进程关联的存储空间，以提高存储空间的利用率。
第九个实施方式，涉及第一终端装置如何与第二终端装置对齐第一TB的传输次数。具体包括：第一终端装置在SCI中向第二终端设备指示该SCI对应的此次第一TB的传输是第几次传输第一TB，可选地，在SCI中包含第一TB的最大传输次数。
其中，在第九个实施方式中，可以将SCI替换为其他信令，例如PC5 RRC消息等。
示例性地，假设第一终端设备需要向第二终端设备发送第一TB，且第一TB的最大传输次数为N，则第一终端设备在初传第一TB时，在初传第一TB对应的SCI(或者用于调度初传的第一TB的SCI)中指示最大传输次数N以及指示是初传或者是第一次传输；后续，第一终端设备在第一次重传第一TB时，在重传SCI中指示“2”，即表示本次为第一次重传/第二次传输第一TB。
需要说明的是，上述第一个实施方式～第九实施方式所述的行为动作可以适用于图4或图5所示方法中，不予赘述。
此外，对于第二终端装置侧，本申请实施例不限于在第二定时器超时后，清空第二HARQ进程关联的buffer，释放第二HARQ进程，还可以在第二终端装置成功解析(decode)第一TB或者接收到新传TB的指示后，清空第二HARQ进程关联的buffer、释放第二HARQ 进程。具体的，该过程如图6所示。
如图6所示，为本申请实施例提供的又一种控制HARQ进程的方法，该方法可以包括：
步骤601：第二终端装置成功解码第一终端装置通过第一HARQ进程传输的第一TB，或者，向第一终端装置发送第一TB对应的ACK，或者，生成向第一终端装置发送的ACK，或者，确认解码成功，或者，在仅需要反馈NACK的前提下，确反馈ACK，或者，接收到来自第一终端装置的新传指示，或者，接收到来自第一终端装置的针对第一TB对应的HARQ进程的新传指示，或者，第二终端装置与第一终端装置之间的距离大于预设距离，第二终端装置清空第二HARQ进程关联的buffer。
其中，新传指示的相关描述如上所述，不予赘述。
其中，预设距离可以根据需要设置，当第二终端装置与第一终端装置之间的距离大于预设距离时，表示第二终端装置与第一终端装置距离较远，二者可能断开通信，或者，因距离较远，则不能成功传输TB或不支持/不需要发送HARQ反馈。
其中，第二终端清空第二HARQ进程关联的buffer可以指：第二终端装置将第二定时器运行期间，第二HARQ进程关联的buffer中的TB从buffer中删除(delete)/清除(clear)。第二终端装置清空第二HARQ进程关联的buffer还可以替换为第二终端装置覆盖第二HARQ进程关联的buffer，如：第二定时器超时后，第二终端装置不清空第二HARQ进程关联的buffer，而是当第二终端装置再次通过第一HARQ进程接收到其他新的TB，如：第二TB时，用接收到的第二TB覆盖/替换/更新第二HARQ进程关联的buffer中的TB。
步骤602：第二终端装置停止通过第二HARQ进程接收第一TB。
其中，第二终端装置停止通过第一HARQ进程接收第一TB还可以称为第二终端装置解锁或释放第一HARQ进程，使第一HARQ进程处于空闲状态或者通过第一HARQ进程接收新的TB。例如，进一步的，第二终端装置通过第一HARQ进程接收第二TB。
需要说明的是，在图7所示方法中，不限定第二终端装置清空第二HARQ进程的buffer、第二终端装置停止通过第二HARQ进程接收第一TB的顺序，可以先执行清空第二HARQ进程的buffer、再停止通过第二HARQ进程接收第一TB，也可以先停止通过第二HARQ进程接收第一TB，再清空第二HARQ进程关联的buffer，还可以同时清空第二HARQ进程的buffer、停止通过第二HARQ进程接收第一TB，不予限制。
基于图6所示方法，第二终端装置可以在成功解码第二终端装置通过第二HARQ进程接收到的第一TB，或者，向第一终端装置发送第一TB对应的ACK，或者，生成向第一终端装置发送的ACK，或者，接收到来自第一终端装置的新传指示，或者，第二终端装置与第一终端装置之间的距离大于预设距离的情况下，清空第二HARQ进程关联的buffer，利用第二HARQ进程关联的buffer存储其他新的TB。如此，可以及时清理成功传输TB或者不利于传输TB的HARQ进程关联的buffer，提高第二终端装置的存储能力。
需要说明的是，图6所示方式中，第二终端装置维护的第二HARQ进程可以对应配置有第二定时器，其中，第二定时器的相关描述如上所述，第二终端装置维护第二定时器的行为，如：重启/开启第二定时器、在第二定时器运行期间的行为、第二定时器超时后的行为可参照上述，不予赘述。
此外，现有基于定时器或最大传输次数停止定时器的做法不能满足TB传输的服务质量(quality of service，QoS)要求，例如，不能满足TB的可靠性要求。
例如，如果只在该HARQ进程上传输TB的次数达到最大传输次数时或之后，才停止在该HARQ进程上传输TB，但是，如果该HARQ进程上传输TB的次数未达到最大传输次数时，就已经超过该TB的时延要求时，影响TB的传输质量。例如，mode2时，发端UE需要为TB1的重复传输预留sidelink资源，当第一次预留的sidelink资源用完之后，需要重新预留第二次的sidelink资源，若两次预留间隔时间较长，超过该TB的时延要求，影响TB的传输时延，不能满足TB传输的QoS要求。
又或者，网络设备为发端UE分配的、用于传输TB的sidelink资源够用，HARQ进程上传输TB的次数已达到最大传输次数，但是，由于定时器未超时，则会继续锁定该HARQ进程，直至该定时器超时，如此，在该定时器关联的HARQ进程上停止传输TB的情况下，因该HARQ进程长时间内处于挂起状态，无法用于传输其他新的TB，造成资源浪费。
为解决现有技术不能满足TB传输的QoS要求的问题，本申请实施例还提供一种控制HARQ进程的方法，如图7所示，为本申请实施例提供的又一种控制HARQ进程的方法，该方法可以包括：
步骤701：第一终端装置通过第一HARQ进程，向第二终端装置传输第一TB。
其中，第一HARQ进程的相关描述可参照步骤401中所述，不予赘述。
示例性的，第一终端装置通过第一HARQ进程，向第二终端装置传输第一TB可以包括：第一终端装置生成/获取多个LCH的数据之后，将多个LCH的数据复用到第一TB中，用第一HARQ进程对第一TB进行处理，将处理后的第一TB通过sidelink资源发送给第二终端装置。
步骤702：第一终端设备根据最大传输次数和/或第一定时器确定释放第一HARQ进程。
其中，第一定时器与第一HARQ进程关联。最大传输次数、第一定时器的相关描述可参照步骤401中所述，不予赘述。
一种示例中，第一终端设备根据最大传输次数和第一定时器，确定释放第一HARQ进程，可以包括：当第一HARQ进程传输的第一TB的次数小于最大传输次数，第一定时器超时/停止时，第一终端装置确定释放第一HARQ进程。
又一种示例中，第一终端设备根据最大传输次数和第一定时器，确定释放第一HARQ进程，可以包括：当第一HARQ进程传输第一TB的次数等于或超过最大传输次数时，第一终端装置确定释放第一HARQ进程。
进一步的，步骤702之后，所述方法还包括：
第一终端装置向第二终端装置通知第一定时器超时/停止，或者，通过第一HARQ进程传输的第一TB的次数等于或超过最大传输次数，或者，第一HARQ进程释放。
进一步的，步骤702之后，所述方法还包括；第一终端装置停止第一定时器。
其中，图7所示方法中，在第一终端装置停止第一定时器之后，第一终端装置可参照第一个实施方式，释放第一HARQ进程，不予赘述。
其中，在图7所示方法中，可参照第二个实施方式，配置第一终端装置内的第一定时器，不予赘述。
其中，在图7所示方法中，第一终端装置可参照第三个实施方式，开启/重启第一定时器，不予赘述。
其中，在图7所示方法中，在第一定时器运行期间，第一终端装置的执行动作可参照 第四个实施方式中所述，不予赘述。
基于图7所示方法，第一终端装置可以综合考虑定时器以及TB的最大传输次数，根据定时器以及TB的最大传输次数，确定是否释放第一HARQ进程，停止第一HARQ关联的第一定时器，如此，使得发端不单单根据定时器或者TB的最大传输次数确定释放第一HARQ进程，提高TB的传输要求。
上述主要从各个网元之间交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是，各个网元，例如：第一终端装置、第二终端装置为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对第一终端装置、第二终端装置进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
图8示出了一种通信装置80的结构图，该通信装置80可以为第一终端装置，或者第一终端装置中的芯片，或者片上系统，该通信装置80可以用于执行上述实施例中涉及的终端的功能。图8所示通信装置80可以包括：处理单元801，发送单元802；
一种示例中，处理单元801，用于确定通过第一HARQ进程传输的TB为最后一次传输的第一TB或者是新传TB，或者，通过第一HARQ进程传输的第一TB的次数达到最大传输次数，停止第一定时器。例如，处理单元801可以支持通信装置80执行步骤401。
发送单元802，用于向第二终端装置发送第一指示信息，其中，第一指示信息用于指示通过第一HARQ进程传输的传输块TB为最后一次传输的第一TB或者是新传TB，或者，用于指示通过第一HARQ进程传输的第一TB的次数达到最大传输次数。例如，发送单元802可以用于指示通信装置80执行步骤402。
又一种示例中，处理单元801，用于确定接收否定应答NACK的次数等于或超过M次，停止第一定时器。例如，处理单元801可以支持通信装置80执行步骤504。
再一种示例中，发送单元802，用于通过第一HARQ进程，向第二终端装置传输第一TB。例如，发送单元802可以支持通信装置80执行步骤701。
处理单元801，用于根据最大传输次数和/或第一定时器，确定释放所述第一HARQ进程。例如，处理单元801可以用于支持通信装置80执行步骤702。
其中，处理单元801可以参照方法实施例中的第一个实施方式～第四个实施方式，实现对第一HARQ关联的第一定时器的维护，不予赘述。
具体的，上述图4或者图5或图7所示方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。通信装置80用于执行图4或者图5或图7所示控制HARQ进程的方法中第一终端装置的功能，因此可以达到与上述控制HARQ进程的方法相同的效果。
作为又一种可实现方式，图8所示通信装置80还可以包括存储模块，用于存储通信装置80的程序代码和数据。其中，处理单元801可以是处理器或控制器。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。发送单元可以是收发电路或通信接口等。存储模块可以是存储器。当处理单元801为处理器301，发送单元802为收发电路302，存储模块为存储器304时，本申请实施例所涉及的通信装置80可以为图3所示装置300。
图9示出了一种通信装置90的结构图，该通信装置90可以为第二终端装置，或者第二终端装置中的芯片，或者片上系统，该通信装置90可以用于执行上述实施例中涉及的终端的功能。图9所示通信装置90可以包括：接收单元901，处理单元902；
一种示例中，接收单元901，用于接收来自第一终端装置的第一指示信息，其中，第一指示信息用于指示通过第一HARQ进程传输的传输块TB为最后一次传输的第一TB或者是新传TB，或者，指示通过第一HARQ进程对应的第一TB的次数达到最大传输次数。例如，接收单元901用于支持通信装置90执行步骤403。
处理单元902，用于根据第一指示信息，停止第二定时器，其中，第二定时器与第二HARQ进程关联，第二HARQ进程与第一HARQ进程关联。例如，处理单元902用于支持通信装置90执行步骤403。
又一种示例中，处理单元902，用于确定向第一终端装置反馈否定应答NACK的次数超过M次，停止第二定时器。例如，处理单元902用于支持通信装置90执行步骤505。
再一种示例中，处理单元902，用于在成功解码第一终端装置传输的第二HARQ进程传输对应的第一传输块TB，或者，向第一终端装置发送第一TB对应的肯定应答ACK，或者，生成向第一终端装置发送的肯定应答ACK，或者，接收到来自第一终端装置的新传指示，或者，第二终端装置与第一终端装置之间的距离大于预设距离的情况下，清空第二HARQ进程关联的缓存buffer，停止通过第二HARQ进程接收第一TB。进一步的，通过第二HARQ进程接收第二TB。例如，处理单元902用于支持通信装置90执行步骤601、步骤602。
其中，处理单元902可以参照方法实施例中的第五个实施方式～第八个实施方式，实现对第二HARQ关联的第二定时器的维护，不予赘述。
具体的，上述图4或者图5或图6所示方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。通信装置90用于执行图4或者图5或图6所示控制HARQ进程的方法中第二终端装置的功能，因此可以达到与上述控制HARQ进程的方法相同的效果。
作为又一种可实现方式，图9所示通信装置90还可以包括存储模块，用于存储通信装置90的程序代码和数据。其中，处理单元902可以是处理器或控制器。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。发送单元901可以是收发电路或通信接口等。存储模块可以是存储器。当处理单元902为处理器301，发送单元901为收发电路302，存储模块为存储器304时，本申请实施例所涉及的通信装置90可以为图3所示装置300。
图10为本申请实施例提供的一种通信系统的结构图，如图10所示，该通信系统可以包括：第一终端装置100、第二终端装置110。进一步的，还可以包括网络设备。
其中，第一终端装置100具备图8所示的通信装置80的功能。第二终端装置110具备图9所示的通信装置90的功能。
一种示例中，第一终端装置100，用于确定通过第一HARQ进程传输的TB为最后一次传输的第一TB或者是新传TB，或者，通过第一HARQ进程传输的第一TB的次数达到最大传输次数，停止第一定时器，向第二终端装置110发送第一指示信息，第一指示信息用于指示通过第一HARQ进程传输的传输块TB为最后一次传输的第一TB或者是新传TB，或者，用于指示通过第一HARQ进程传输的第一TB的次数达到最大传输次数；
第二终端装置110，用于根据第一指示信息停止第二定时器。
又一种示例中，第一终端装置100，用于在第一TB对应的NACK的次数等于或超过M次，停止第一定时器。第二终端装置110在第一TB对应的NACK的次数等于或超过M次，停止第二定时器。
再一种示例中，第一终端装置100，用于根据最大传输次数和/或第一定时器，确定释放所述第一HARQ进程。
再一种示例中，第二终端装置110，用于在成功解码第一终端装置100传输的第二HARQ进程传输对应的第一传输块TB，或者，向第一终端装置100发送第一TB对应的肯定应答ACK，或者，生成向第一终端装置100发送的肯定应答ACK，或者，接收到来自第一终端装置100的新传指示，或者，第二终端装置110与第一终端装置100之间的距离大于预设距离的情况下，清空第二HARQ进程关联的缓存buffer，停止通过第二HARQ进程接收第一TB。
具体的，上述图4～图7所示方法实施例涉及的各步骤的所有相关内容均可以援引到第一终端装置100、第二终端装置110的功能模块的功能描述，在此不再赘述。第一终端装置100、第二终端装置110可以用于执行图4～图7所示控制HARQ进程的方法中第二终端装置的功能，因此可以达到与上述控制HARQ进程的方法相同的效果。
本申请实施例还提供了一种计算机可读存储介质。上述方法实施例中的全部或者部分流程可以由计算机程序来指令相关的硬件完成，该程序可存储于上述计算机可读存储介质中，该程序在执行时，可包括如上述各方法实施例的流程。计算机可读存储介质可以是前述任一实施例的终端装置(包括数据发送端和/或数据接收端)的内部存储单元，例如终端装置的硬盘或内存。上述计算机可读存储介质也可以是上述终端装置的外部存储设备，例如上述终端装置上配备的插接式硬盘，智能存储卡(smart media card,SMC)，安全数字(secure digital,SD)卡，闪存卡(flash card)等。进一步地，上述计算机可读存储介质还可以既包括上述终端装置的内部存储单元也包括外部存储设备。上述计算机可读存储介质用于存储上述计算机程序以及上述终端装置所需的其他程序和数据。上述计算机可读存储介质还可以用于暂时地存储已经输出或者将要输出的数据。
需要说明的是，本申请的说明书、权利要求书及附图中的术语“第一”和“第二”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或 单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。
应当理解，在本申请中，“至少一个(项)”是指一个或者多个，“多个”是指两个或两个以上，“至少两个(项)”是指两个或三个及三个以上，“和/或”，用于描述关联对象的关联关系，表示可以存在三种关系，例如，“A和/或B”可以表示：只存在A，只存在B以及同时存在A和B三种情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b或c中的至少一项(个)，可以表示：a，b，c，“a和b”，“a和c”，“b和c”，或“a和b和c”，其中a，b，c可以是单个，也可以是多个。
应理解，在本申请实施例中，“与A对应的B”表示B与A相关联。例如，可以根据A可以确定B。还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。此外，本申请实施例中出现的“连接”是指直接连接或者间接连接等各种连接方式，以实现设备间的通信，本申请实施例对此不做任何限定。
本申请实施例中出现的“传输”(transmit/transmission)如无特别说明，是指双向传输，包含发送和/或接收的动作。具体地，本申请实施例中的“传输”包含数据的发送，数据的接收，或者数据的发送和数据的接收。或者说，这里的数据传输包括上行和/或下行数据传输。数据可以包括信道和/或信号，上行数据传输即上行信道和/或上行信号传输，下行数据传输即下行信道和/或下行信号传输。本申请实施例中出现的“网络”与“系统”表达的是同一概念，通信系统即为通信网络。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个装置，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
或者也可以分布到多个不同地方。或者也可以分布到多个不同地方。根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
或者也可以分布到多个不同地方。根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个可读取存储介质中。基于这样的理解，本申请实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现 出来，该软件产品存储在一个存储介质中，包括若干指令用以使得一个设备，如：可以是单片机，芯片等，或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何在本申请揭露的技术范围内的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (29)

  1. 一种控制混合自动重传请求HARQ进程的方法，其特征在于，所述方法包括：
    第一终端装置确定通过第一HARQ进程传输的传输块TB是新传TB或者为最后一次传输的第一TB，或者，通过第一HARQ进程传输的第一TB的次数达到最大传输次数；
    所述第一终端设备停止第一定时器，其中，所述第一定时器与第一HARQ进程关联。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    所述第一终端装置向第二终端装置发送第一指示信息，其中，所述第一指示信息用于指示通过第一HARQ进程传输的传输块TB为最后一次传输的第一TB或者是新传TB，或者，用于指示通过第一HARQ进程传输的第一TB的次数达到最大传输次数。
  3. 一种控制混合自动重传请求HARQ进程的方法，其特征在于，所述方法包括：
    第一终端装置确定接收否定应答NACK的次数等于或超过M次，其中，所述M为大于或者等于1的整数，所述NACK用于指示所述第二终端装置未正确接收到通过第一HARQ进程传输的第一传输块TB；
    所述第一终端装置停止第一定时器，其中，所述第一定时器与所述第一HARQ关联。
  4. 一种控制混合自动重传请求HARQ进程的方法，其特征在于，所述方法包括：
    第一终端装置通过第一HARQ进程，向第二终端装置传输第一传输块TB；
    第一终端设备根据最大传输次数和/或第一定时器，确定释放所述第一HARQ进程，其中，所述第一定时器与所述第一HARQ进程关联。
  5. 根据权利要求4所述的方法，其特征在于，所述第一终端设备根据最大传输次数和第一定时器，确定释放所述第一HARQ进程，包括：
    当所述第一HARQ进程传输的第一TB的次数小于所述最大传输次数，所述第一定时器超时时，所述第一终端装置确定释放所述第一HARQ进程。
  6. 根据权利要求4所述的方法，其特征在于，所述第一终端设备根据最大传输次数和第一定时器，确定释放所述第一HARQ进程，包括：
    当所述第一HARQ进程传输所述第一TB的次数等于或超过所述最大传输次数时，所述第一终端装置确定释放所述第一HARQ进程。
  7. 根据权利要求3-6任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端装置向所述第二终端装置通知所述第一定时器超时，或者，通过所述第一HARQ进程传输的所述第一TB的次数等于或超过最大传输次数，或者，所述第一HARQ进程释放。
  8. 根据权利要求1-7任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端装置释放所述第一HARQ进程；和/或，
    所述第一终端装置向网络设备发送释放通知，其中，所述释放通知用于通知所述网络设备释放所述第一HARQ。
  9. 根据权利要求1-8任一项所述的方法，其特征在于，所述第一定时器以及所述第一定时器的时长由所述第一终端装置配置；
    所述第一TB复用一个或者多个逻辑信道LCH的数据，所述第一定时器的时长等于所述一个或者多个LCH中，优先级最高的LCH对应的第一参数；或者，
    所述第一TB复用一个或者多个逻辑信道LCH的数据，所述第一定时器的时长等于所 述一个或者多个LCH对应的第一参数中取值最小的第一参数。
  10. 根据权利要求9所述的方法，其特征在于，
    所述LCH对应的第一参数是预配置参数或者由所述网络设备配置。
  11. 根据权利要求1-10所述的方法，其特征在于，
    所述第一定时器以及所述第一定时器的时长是预配置参数或者由网络设备配置。
  12. 根据权利要求1-11任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端装置接收新传指示，根据所述新传指示，启动所述第一定时器，其中，所述新传指示用于指示所述第一终端装置通过所述第一HARQ进程传输新的TB，所述新传指示携带在DCI或者媒体接入控制控制单元MAC CE中；或者，
    所述第一终端装置接收到所述第二终端装置发送的否定应答NACK，启动所述第一定时器，其中，所述NACK用于指示所述第二终端装置未正确接收到所述第一TB，所述N为大于或者等于1的整数；或者，
    所述第一终端装置确定通过所述第一HARQ进程向所述第二终端装置重传所述第一TB,启动所述第一定时器。
  13. 根据权利要求1-12任一项所述的方法，其特征在于，所述方法还包括：
    在所述第一定时器未超时和/或传输所述第一TB的次数未达到最大传输次数的情况下，若所述第二终端装置未正确接收到所述第一TB，用于传输所述第一TB的资源小于预设阈值，则所述第一终端装置获取新的用于传输所述第一TB的资源；或者，
    在所述第一定时器未超时的情况下，传输所述第一TB的次数未达到最大传输次数，用于传输所述第一TB的资源小于预设阈值，所述第一终端装置获取新的用于传输所述第一TB的资源。
  14. 根据权利要求1-13任一项所述的方法，其特征在于，所述方法还包括：
    所述第一终端装置接收到所述第二终端装置反馈的肯定应答ACK，所述第一终端装置清空所述第一HARQ进程关联的缓存buffer，所述ACK用于指示所述第二终端装置正确接收到所述第一终端装置通过所述第一HARQ进程传输的所述第一TB；或者；
    所述第一终端装置接收来自网络设备的新传指示，所述第一终端装置根据所述新传指示，清空所述第二HARQ进程关联的buffer，所述新传指示用于指示所述第一终端装置通过所述第一HARQ进程传输新的TB；或者，
    在所述第一终端装置通过所述第一HARQ进程，向所述第二终端装置成功发送最后一次传输的第一TB时，所述第一终端装置清空所述第二HARQ进程关联的buffer。
  15. 根据权利要求14所述的方法，其特征在于，所述方法还包括：
    所述第一终端装置通过所述第一HARQ进程发送第二TB。
  16. 一种控制混合自动重传请求HARQ进程的方法，其特征在于，所述方法包括：
    第二终端装置接收来自第一终端装置的第一指示信息，其中，所述第一指示信息用于指示通过第一HARQ进程传输的传输块TB为最后一次传输的第一TB或者是新传TB，或者，指示通过所述第一HARQ进程对应的第一TB的次数达到最大传输次数；
    所述第二终端装置根据所述第一指示信息，停止第二定时器，其中，所述第二定时器与第二HARQ进程关联，所述第二HARQ进程与所述第一HARQ进程关联。
  17. 一种控制混合自动重传请求HARQ进程的方法，其特征在于，所述方法包括：
    第二终端装置确定向第一终端装置反馈否定应答NACK的次数超过M次，其中，所述M为大于或者等于1的整数，其中，所述NACK用于指示所述第二终端装置未成功解码通过第二HARQ进程接收到的第一传输块TB；
    所述第二终端装置停止第二定时器，所述第二定时器与所述第二HARQ进程关联。
  18. 根据权利要求17所述的方法，其特征在于，
    所述M由所述第一终端装置配置给所述第二终端装置。
  19. 根据权利要求16-18任一项所述的方法，其特征在于，
    所述第二终端装置接收来自所述第一终端装置的配置信息，根据所述配置信息启动所述第二定时器，其中，所述配置信息用于指示所述第二终端装置启动所述第二定时器；或者，
    所述第二终端装置接收来自网络设备的重启指示，根据所述重启指示启动所述第二定时器，其中，所述重启指示用于指示重启所述第二定时器。
  20. 根据权利要求16-19任一项所述的方法，其特征在于，
    所述第二定时器以及所述第二定时器的时长是预配置参数或者由网络设备配置；或者，
    所述第二定时器以及所述第二定时器的时长由所述第一终端装置配置；或者，
    所述第二定时器以及所述第二定时器的时长由所述第二终端装置配置。
  21. 根据权利要求16-20任一项所述的方法，其特征在于，所述方法还包括：
    所述第二终端装置清空所述第二HARQ进程相关联的buffer；
    所述第二终端装置停止通过所述第二HARQ进程接收所述第一TB，通过所述第二HARQ进程接收第二TB。
  22. 一种装置，其中，所述通信装置包括处理器、存储器，所述存储器中存储有指令；所述指令被所述处理器执行时，实现如权利要求1-15任一项所述的控制HARQ进程的方法。
  23. 一种计算机可读存储介质，其中，所述计算机可读存储介质包括计算机指令，当所述计算机指令在计算机上运行时，使得计算机执行如权利要求1-15任一项所述的控制HARQ进程的方法。
  24. 一种计算机程序产品，其中，所述计算机程序产品包括计算机指令，当所述计算机指令在计算机上运行时，使得计算机执行如权利要求1-15任一项所述的控制HARQ进程的方法。
  25. 一种芯片系统，其中，包括：所述芯片系统包括处理器、存储器，所述存储器中存储有指令；所述指令被所述处理器执行时，实现如权利要求1-15任一项所述的控制HARQ进程的方法。
  26. 一种装置，其中，所述通信装置包括处理器、存储器，所述存储器中存储有指令；所述指令被所述处理器执行时，实现如权利要求16-21任一项所述的控制HARQ进程的方法。
  27. 一种计算机可读存储介质，其中，所述计算机可读存储介质包括计算机指令，当所述计算机指令在计算机上运行时，使得计算机执行如权利要求16-21任一项所述的控制HARQ进程的方法。
  28. 一种计算机程序产品，其中，所述计算机程序产品包括计算机指令，当所述 计算机指令在计算机上运行时，使得计算机执行如权利要求16-21任一项所述的控制HARQ进程的方法或者。
  29. 一种芯片系统，其中，包括：所述芯片系统包括处理器、存储器，所述存储器中存储有指令；所述指令被所述处理器执行时，实现如权利要求16-21任一项所述的控制HARQ进程的方法。
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