WO2021238669A1 - 侧行链路的通信方法和通信装置 - Google Patents

侧行链路的通信方法和通信装置 Download PDF

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Publication number
WO2021238669A1
WO2021238669A1 PCT/CN2021/093610 CN2021093610W WO2021238669A1 WO 2021238669 A1 WO2021238669 A1 WO 2021238669A1 CN 2021093610 W CN2021093610 W CN 2021093610W WO 2021238669 A1 WO2021238669 A1 WO 2021238669A1
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WIPO (PCT)
Prior art keywords
terminal device
timer
information
resource
data
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PCT/CN2021/093610
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English (en)
French (fr)
Inventor
李翔宇
王君
范强
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华为技术有限公司
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Publication of WO2021238669A1 publication Critical patent/WO2021238669A1/zh

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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
    • H04L1/1812—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Definitions

  • the present application relates to the field of communication, and more specifically, to a side link communication method and communication device.
  • the Internet of Vehicles (vehicle to everything, V2X) is considered to be one of the fields with the most industrial potential and the clearest market demand in the Internet of Things system. It has the characteristics of wide application space, large industrial potential, and strong social benefits.
  • the innovation and development of the communications industry, the construction of new models and new business formats for automobiles and transportation services, the promotion of the innovation and application of autonomous driving technologies, and the improvement of transportation efficiency and safety are of great significance.
  • the development of intelligent transportation systems has promoted the development of the Internet of Vehicle (IoV) from the traditional Internet of Vehicles that only supports in-vehicle information services to the next-generation Internet of Vehicles that supports vehicle to everything (V2X) services.
  • IoV Internet of Vehicle
  • V2V vehicle to vehicle
  • V2I vehicle to infrastructure
  • V2P vehicle to pedestrian
  • V2N vehicle to network
  • the application of the V2X system will improve driving safety, reduce congestion and vehicle energy consumption, improve traffic efficiency and in-vehicle entertainment information.
  • 3GPP 3 rd generation partnership project
  • LTE long term evolution
  • V2X is also a hot topic of discussion in the new radio (NR) system.
  • NR-V2X needs to support more complex and diverse scenarios, such as unicast, broadcast, and multicast scenarios. With the expansion of application scenarios and business requirements, the power consumption of V2X devices has attracted attention.
  • the present application provides a side link communication method and communication device, in order to reduce the power consumption of terminal equipment.
  • a wireless communication method is provided.
  • the method can be executed by a first terminal device or a module (such as a chip or a processor) configured (or used for) the first terminal device.
  • the terminal device execution is taken as an example for description.
  • the method includes: a first terminal device sends first data to a second terminal device, the first data corresponds to a first hybrid automatic repeat request HARQ process; the first terminal device starts or restarts a first timer, the first The timer is used to indicate the minimum time interval before the first information can be sent to the second terminal device, and the first information indicates that the first terminal device schedules the retransmission data corresponding to the first HARQ process.
  • the first terminal device after the first terminal device sends the first data to the second terminal device, it starts or restarts the first timer; the first terminal device sends the first timer to the second terminal device after the first timer expires. information.
  • the first terminal device after the first terminal device sends the first data to the second terminal device, it starts or restarts the first timer; while the first timer is running, the first terminal device does not send the first data to the second terminal device. information.
  • the duration of the first timer is stipulated by the protocol or pre-configured.
  • the duration of the first timer may be related to the data processing time of the second terminal device and/or the time that the first terminal device prepares to retransmit data.
  • the first terminal device stops sending data to the second terminal device for a period of time.
  • the second terminal device sends the scheduling indication information (ie, the first information) of the retransmission data corresponding to the first HARQ process, so that the second terminal device can determine that the first terminal device does not send the first information without detecting the first information within the time period.
  • One piece of information can make the terminal devices that perform side-link communication have a consistent understanding of sending and receiving data, reduce unnecessary power consumption of the terminal device, and save power.
  • the starting or restarting the first timer includes: the HARQ feedback of the first HARQ process is enabled, and the first terminal device receives the data from the second After the HARQ feedback information of the terminal device, the first timer is started or restarted, and the HARQ feedback information corresponds to the first HARQ process.
  • the first terminal device does not send the first information for a period of time after receiving the HARQ feedback information from the second terminal device.
  • the time period for the first terminal device to send the first information is specified, which enables the side link to be performed.
  • the communication terminal equipment has the same understanding of sending and receiving data, reducing unnecessary power consumption of the terminal equipment.
  • the HARQ feedback information indicates that the first data is not successfully received.
  • the first terminal device determines that the second terminal device has not successfully received the first data according to the HARQ feedback information, it prepares for retransmission within a period of time, and does not send the first information to the second terminal device, so that the second terminal device It can be determined that the first terminal device does not send the first information and does not detect the first information within this time period, which can make the terminal devices performing sidelink communication have a consistent understanding of sending and receiving data, and reduce unnecessary power consumption of the terminal device. Save power.
  • the HARQ feedback of the first HARQ process is disabled.
  • the first terminal device determines that the HARQ feedback of the first HARQ process is disabled, the first terminal device does not send the first information to the second terminal device within a period of time after sending the first data, so that the second terminal device can Determining that the first terminal device does not send the first information and does not detect or monitor the first information during the running of the first timer can make the terminal devices that perform sidelink communication have a consistent understanding of sending and receiving data, Reduce unnecessary power consumption of terminal equipment and save power.
  • the method further includes: after the first timer expires, the first terminal device starts or restarts a second timer, wherein the first terminal device is The time interval for sending the retransmission data corresponding to the first HARQ process during the running period of the second timer.
  • the first terminal device can send the first information within a period of time, so that the second terminal device can determine that the first terminal device sends the retransmission within the period of time Detecting the retransmitted data based on the data can make the terminal devices performing side-link communication have a consistent understanding of the received and sent data, reduce unnecessary power consumption of the terminal devices, and save power.
  • the method further includes: after the second timer expires, the first terminal device releases the first HARQ process or restarts the first timer.
  • the first terminal device transmission time period is specified, so that the terminal devices performing side-link communication have consistent understanding of receiving and sending, reducing unnecessary power consumption of the terminal device, and saving power.
  • a wireless communication method is provided.
  • the method can be executed by a second terminal device or a module (such as a chip or a processor) configured (or used for) the second terminal device.
  • the terminal device execution is taken as an example for description.
  • the method includes: a second terminal device receives first data from a first terminal device, the first data corresponding to a first hybrid automatic repeat request HARQ process; the second terminal device starts or restarts a third timer, and the second terminal device starts or restarts a third timer.
  • the three timers are used to indicate the minimum time interval before the first information can be received, and the first information indicates that the first terminal device schedules the retransmission data of the first HARQ process.
  • the second terminal device after receiving the first data from the first terminal device, the second terminal device starts or restarts the third timer; the second terminal device detects from the second terminal device after the third timer expires The first information.
  • the second terminal device after receiving the first data from the first terminal device, the second terminal device starts or restarts the third timer; while the third timer is running, the second terminal device does not detect data from the first terminal device The first information.
  • the starting or restarting of the third timer includes: the HARQ feedback of the first HARQ process is enabled, and the second terminal device reports to the first terminal device After sending the HARQ feedback information, start or restart the third timer, and the HARQ feedback information corresponds to the first HARQ process.
  • the HARQ feedback information indicates that the first data is not successfully received.
  • the HARQ feedback of the first HARQ process is disabled.
  • the method further includes: after the third timer expires, the second terminal device starts or restarts a second timer, wherein the second timer indicates The time interval during which the second terminal device can receive the retransmitted data corresponding to the first HARQ process.
  • the method further includes: after the second timer expires, the second terminal device releases the first HARQ process or restarts a third timer.
  • a wireless communication method is provided.
  • the method can be executed by a first terminal device or a module (such as a chip or a processor) configured (or used for) the first terminal device.
  • the terminal device execution is taken as an example for description.
  • the method includes: a first terminal device determines a first resource, the first resource is used to carry second information, the second information is used to instruct to stop a fourth timer, and the fourth timer is running for the first terminal device The activation time of the DRX operation with the second terminal device; the first terminal device sends the second information to the second terminal device, and the second information is carried on the first resource.
  • the first terminal device instructs the second terminal device to stop the fourth timer through the second information, so that the DRX operation between the first terminal device and the second terminal device enters the inactive time, which enables the first terminal device In the case that the DRX operation condition is not met, it is instructed to stop the fourth timer in time to reduce unnecessary power consumption of the terminal device.
  • the first terminal device determines to stop the fourth timer, including: the first terminal device determines to stop the fourth timer when the first condition is satisfied ,
  • the first condition includes one or more of the following:
  • the power of the first terminal device is less than or equal to the threshold, the service demand of the first terminal device instructs to stop the fourth timer, the number of unicast connections established by the first terminal device is greater than or equal to the threshold, or the SL link quality is less than or Equal to the threshold.
  • the first terminal device determining the first resource includes: the first terminal device sends third information to the first network device, and the third information is used to request The first resource; the first terminal device determines the first resource according to fourth information from the first network device, and the fourth information is used to indicate the first resource.
  • the first terminal device requests and obtains the first resource for sending the second information from the first network device, so that the first terminal device can instruct the second terminal device to stop the fourth timer through the second information, so that the first The DRX operation between the terminal device and the second terminal device enters the inactive time, which enables the first terminal device to instruct to stop the fourth timer in time, thereby reducing unnecessary power consumption of the terminal device.
  • the method before the first terminal device sends the third information to the first network device, the method further includes: the first terminal device receives the first network device The fifth information sent, where the fifth information is used to indicate the second resource, and the second resource is a dedicated resource used to carry the third information.
  • the first terminal device sends the request information (that is, the third information) requesting the first resource through the dedicated resource configured by the first network device, so that the first terminal device can send the third information in time to obtain the first resource , Stop the fourth timer in time to reduce unnecessary power consumption of terminal equipment.
  • the first resource is a configuration authorized resource, or the first resource is a sidelink resource that the first terminal device competes with.
  • the method before the first terminal device determines the first resource, the method further includes: the first terminal device determines to send the second information, and starts the fifth A timer, where the fifth timer is used to indicate the time interval during which the first terminal device can send the second information.
  • the first terminal device determines to send the second information and starts a fifth timer; the first terminal device sends the second information during the running period of the fifth timer.
  • the time interval for the first terminal device to send the second information is specified.
  • the first terminal device sends the first information within this time interval, which can prevent the first terminal device from sending the first information after the time period in which the first information is used. Information and cause unnecessary power consumption.
  • the method further includes: after the first terminal device sends the second information, stopping the fifth timer, or, when the fifth timer runs out And when the first terminal device does not determine the resource used to send the second information, the first terminal device determines not to send the second information to the second terminal device.
  • the fifth timer is used to indicate the time interval at which the second information can be sent. After the first terminal device sends the second information, there is no need to run the fifth timer. The first terminal device stops the fifth timer in time. Reduce unnecessary power consumption of terminal equipment and save power.
  • the second information is a medium access control control element MAC CE.
  • a wireless communication method is provided, which can be executed by a first network device or a module (such as a chip or a processor) configured (or used for) the network device.
  • the method is used by the first network device Take the implementation as an example.
  • the method includes that a first network device receives third information from a first terminal device, the third information is used to request a first resource, and the first resource is used for the first terminal device to send a first radio access control control element
  • the side link resource of the MAC CE the first network device sends fourth information to the first terminal device, and the fourth information is used to indicate the first resource.
  • the first network device after receiving the third information from the first terminal device requesting the first resource, configures the first terminal device with the first resource for sending the first MAC CE through the fourth information, so that A terminal device can send the first MAC CE on the side link resource.
  • the first MAC CE is used to control the discontinuous reception DRX operation of the side link between the first terminal device and the second terminal device.
  • the first network device configures the first terminal device with the first resource used to send the first MAC CE, so that the first terminal device can send the first MAC CE on the side link resource for the first terminal device.
  • a terminal device can control the DRX operation of the side link through the first MAC CE.
  • the method before the first network device receives the third information from the first terminal device, the method further includes: the first network device sends the first terminal device to the first terminal device.
  • the fifth information indication is used to indicate the second resource
  • the second resource is a dedicated resource used to send the third information.
  • the first network device configures a dedicated resource for the first terminal device to send request information (that is, the third information) requesting the first resource, so that the first terminal device can send the third information in time to quickly obtain the first resource, Stop the fourth timer in time to reduce unnecessary power consumption of the terminal device.
  • a communication device may be configured in a first terminal device (for example, a processor or a chip in the first terminal device) or the device may be the first terminal device.
  • the communication device includes: a transceiver unit, used for the second terminal device to send first data, the first data corresponding to the first hybrid automatic repeat request HARQ process; a processing unit, used for starting or restarting the first timer, the first data
  • a timer is used to indicate the minimum time interval before the first information can be sent to the second terminal device, and the first information schedules the retransmission data corresponding to the first HARQ process.
  • the processing unit starts or restarts the first timer after the transceiver unit sends the first data; the transceiver unit does not send the first information while the first timer is running.
  • the processing unit starts or restarts the first timer after the transceiver unit sends the first data; the transceiver unit sends the first information after the first timer expires.
  • the HARQ feedback of the first HARQ process is enabled, and the processing unit is specifically configured to receive the HARQ from the second terminal device at the transceiver unit After the information is fed back, the first timer is started or restarted, and the HARQ feedback information corresponds to the first HARQ process.
  • the HARQ feedback information indicates that the first data is not successfully received.
  • the HARQ feedback of the first HARQ process is disabled, and the processing unit is specifically configured to start or restart after the transceiver unit sends the first data The first timer.
  • the processing unit starts a second timer, where the second timer indicates that the transceiver unit can send the first HARQ The time interval for retransmitting data corresponding to the process.
  • the processing unit releases the first HARQ process or restarts the first timer.
  • a communication device configured in a second terminal device (for example, a processor or a chip in a first terminal device) or the device may be a second terminal device.
  • the communication device includes: a transceiving unit, configured to receive first data from a first terminal device, the first data corresponding to a first hybrid automatic repeat request HARQ process; a processing unit, configured to start or restart a third timer, The third timer is used to indicate the minimum time interval before the first information can be received, and the first information indicates that the first terminal device schedules the retransmission data of the first HARQ process.
  • the processing unit starts or restarts the first timer after the transceiver unit receives the first data; the processing unit does not monitor the first information during the running of the first timer.
  • the processing unit starts or restarts the first timer after the transceiver unit sends the first data; the transceiver unit monitors the first information after the first timer expires.
  • the HARQ feedback of the first HARQ process is enabled, and the processing unit is specifically configured to start or restart the third timing after the transceiver unit sends HARQ feedback information ,
  • the HARQ feedback information corresponds to the first HARQ process.
  • the HARQ feedback information indicates that the first data is not successfully received.
  • the HARQ feedback of the first HARQ process is disabled, and the processing unit is specifically configured to start or restart the third timer after receiving the first data.
  • the processing unit starts a second timer, where the second timer indicates that the transceiver unit can receive the first HARQ The time interval for retransmitting data corresponding to the process.
  • the method further includes: after the second timer expires, the processing unit releases the first HARQ process or restarts a third timer.
  • a communication device configured in a first terminal device (for example, a processor or a chip in the first terminal device) or the device may be the first terminal device.
  • the communication device includes: a processing unit configured to determine a first resource, the first resource is used to carry second information, the second information is used to instruct to stop a fourth timer, and the fourth timer runs during the first The activation time of the DRX operation between the terminal device and the second terminal device; the transceiver unit is configured to send the second information to the second terminal device, and the second information is carried on the first resource.
  • the processing unit specifically determines to stop the fourth timer when the first condition is met, wherein the first condition includes one or more of the following :
  • the power of the first terminal device is less than or equal to the threshold, the service demand of the first terminal device instructs to stop the fourth timer, the number of unicast connections established by the first terminal device is greater than or equal to the threshold, or the SL link quality is less than or Equal to the threshold.
  • the transceiver unit is further configured to send third information to the first network device, and the third information is used to request the first resource; the processing unit is specifically based on the The fourth information determines the first resource, the fourth information comes from the first network device, and the fourth information is used to indicate the first resource.
  • the transceiver unit before the transceiver unit sends the third information to the first network device, the transceiver unit is further configured to receive the fifth information sent by the first network device, The fifth information is used to indicate a second resource, and the second resource is a dedicated resource used to carry the third information.
  • the first resource is a configuration authorized resource, or the first resource is a side link resource that the first terminal device competes for.
  • the processing unit before the processing unit determines the first resource, the processing unit is further configured to determine to send the second information, and start a fifth timer, the fifth The timer is used to indicate the time interval during which the transceiver unit can send the first information.
  • the processing unit is further configured to stop the fifth timer after determining the first resource, or, when the fifth timer runs out, and the processing unit When the resource for sending the second information is not determined, the processing unit determines that the transceiver unit does not send the second information to the second terminal device.
  • the second information is a medium access control control element MAC CE.
  • a communication device configured in a first network device (for example, a processor or a chip in the first network device) or the device may be the first network device.
  • the communication device includes: a transceiver unit, configured to receive third information from a first terminal device, the third information is used to request a first resource, and the first resource is used to send a first radio access control control element MAC CE
  • the processing unit is configured to determine the first resource; the transceiver unit is also configured to send fourth information to the first terminal device, and the fourth information is used to indicate the first resource.
  • the transceiver unit before the transceiver unit receives the third information from the first terminal device, the transceiver unit is further configured to send fifth information to the first terminal device.
  • the five information indication is used to indicate the second resource, and the second resource is a dedicated resource for sending the third information.
  • the first MAC CE is used to control the discontinuous reception DRX operation of the side link between the first terminal device and the second terminal device.
  • a communication device including a processor.
  • the processor is coupled with the memory, and can be used to execute instructions in the memory to implement the foregoing first aspect or third aspect and any one of the first aspect or the third aspect in a possible implementation manner.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, and the processor is coupled with the communication interface.
  • the communication device is a first terminal device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the communication device is a chip configured in the first terminal device.
  • the communication interface may be an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • a communication device including a processor.
  • the processor is coupled with the memory and can be used to execute instructions in the memory to implement the foregoing second aspect and the method in any one of the possible implementation manners of the second aspect.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, and the processor is coupled with the communication interface.
  • the communication device is a second terminal device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the communication device is a chip configured in the second terminal device.
  • the communication interface may be an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • a communication device including a processor.
  • the processor is coupled with the memory and can be used to execute instructions in the memory to implement the foregoing fourth aspect and the method in any one of the possible implementation manners of the fourth aspect.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, and the processor is coupled with the communication interface.
  • the communication device is a first network device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the communication device is a chip configured in the first network device.
  • the communication interface may be an input/output interface.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • a processor including: an input circuit, an output circuit, and a processing circuit.
  • the processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any one of the first aspect to the fourth aspect and any one of the first aspect to the fourth aspect .
  • the above-mentioned processor can be one or more chips
  • the input circuit can be an input pin
  • the output circuit can be an output pin
  • the processing circuit can be a transistor, a gate circuit, a flip-flop, and various logic circuits, etc.
  • the input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver
  • the signal output by the output circuit may be, for example, but not limited to, output to the transmitter and transmitted by the transmitter
  • the circuit can be the same circuit, which is used as an input circuit and an output circuit at different times.
  • the embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.
  • a processing device including a processor and a memory.
  • the processor is used to read instructions stored in the memory, receive signals through a receiver, and transmit signals through a transmitter, so as to implement any one of the first to fourth aspects and any one of the first to fourth aspects. In the method.
  • processors there are one or more processors and one or more memories.
  • the memory may be integrated with the processor, or the memory and the processor may be provided separately.
  • the memory can be a non-transitory (non-transitory) memory, such as a read only memory (ROM), which can be integrated with the processor on the same chip, or can be set in different On the chip, the embodiment of the present application does not limit the type of the memory and the setting mode of the memory and the processor.
  • ROM read only memory
  • sending instruction information may be a process of outputting instruction information from the processor
  • receiving capability information may be a process of the processor receiving input capability information.
  • the data output by the processor may be output to the transmitter, and the input data received by the processor may come from the receiver.
  • the transmitter and receiver can be collectively referred to as a transceiver.
  • the processing device in the above-mentioned thirteenth aspect may be one or more chips.
  • the processor in the processing device can be implemented by hardware or software.
  • the processor may be a logic circuit, integrated circuit, etc.; when implemented by software, the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory, and the memory may Integrated in the processor, can be located outside the processor, and exist independently.
  • a computer program product includes: a computer program (also called code, or instruction), which when the computer program is run, causes the computer to execute the first to fourth aspects above. Aspect and the method in any one of the possible implementation manners of the first aspect to the fourth aspect.
  • a computer-readable storage medium stores a computer program (also called code, or instruction) when it runs on a computer, so that the computer executes the above-mentioned first aspect To the method in the fourth aspect and any one of the possible implementation manners of the first aspect to the fourth aspect.
  • a computer program also called code, or instruction
  • a communication system including the aforementioned first terminal device and second terminal device.
  • FIG. 1 is a schematic diagram of a communication system 100 applicable to an embodiment of the present application.
  • Fig. 2 is a schematic flowchart of a side link communication method provided by an embodiment of the present application.
  • Fig. 3 is another schematic flowchart of a side link communication method provided by an embodiment of the present application.
  • Fig. 4 is an example diagram of a side link communication method provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of another example of a side link communication method provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of another example of a side link communication method provided by an embodiment of the present application.
  • Fig. 7 is a schematic block diagram of an example of the communication device of the present application.
  • Fig. 8 is a schematic structural diagram of an example of a terminal device of the present application.
  • Fig. 9 is a schematic structural diagram of an example of a network device of the present application.
  • LTE long term evolution
  • FDD frequency division duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • 5G Fifth Generation
  • NR New Radio
  • V2X vehicle-to-X
  • V2X can include vehicle-to-network (V2N), vehicle-to-vehicle (V2V), and vehicle-to-infrastructure ( vehicle to infrastructure (V2I), vehicle to pedestrian (V2P), etc.
  • LTE-V Long Term Evolution-Vehicle (LTE-V) of workshop communication
  • Internet of Vehicles Internet of Vehicles
  • MTC machine type communication
  • IoT Internet of Things
  • LTE-M long term evolution-machine
  • M2M machine to machine
  • NTN non-terrestrial network
  • FIG. 1 is a schematic diagram of a communication system 100 applicable to an embodiment of the present application.
  • the communication system applicable to the embodiments of the application may include at least two terminal devices, such as the terminal devices 102, 103, 104, and 105 in the communication system 100 as shown in FIG. 1.
  • the communication system applicable to the embodiments of the application may further include at least one network device, such as the network device 101 in the wireless communication system 100 shown in FIG. 1.
  • a sidelink (SL) can be established between the at least two terminal devices, such as links 120, 121, 122, 123, and 124 in Figure 1.
  • the terminal devices that have established sidelinks can be directly connected to each other. To communicate. Among them, one terminal device can establish a side link with one or more terminal devices.
  • the terminal devices in the communication system can also establish a wireless connection with the network device for data communication.
  • the terminal devices 102 and 103 shown in FIG. 1 establish wireless links 110 and 111 with the network device, respectively.
  • the terminal equipment in the communication system may not establish a wireless link with the network equipment, such as the terminal equipment 104 and 105 shown in FIG. 1, which is not limited in this application.
  • the terminal equipment in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal , Wireless communication equipment, user agent or user device.
  • the terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety ( Wireless terminal in transportation safety), wireless terminal in smart city, wireless terminal in smart home (smart home), cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local Loop (wireless local loop, WLL) stations, personal digital assistants (personal digital assistants, PDAs), handheld devices with wireless communication functions, computing devices or other processing equipment connected to wireless modems, vehicle-mounted equipment,
  • wearable devices can also be called wearable smart devices, which are the general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories.
  • Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which need to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets and smart jewelry for physical sign monitoring.
  • the terminal device may also be a terminal device in an Internet of Things (IoT) system.
  • IoT Internet of Things
  • Its main technical feature is to connect objects to the network through communication technology, so as to realize the intelligent network of human-machine interconnection and interconnection of things.
  • the technical solutions in the embodiments of the present application can also be applied to network equipment.
  • the network equipment includes but is not limited to: evolved Node B (eNB), radio network controller (RNC), road side unit (RSU), node B (node B, NB) ), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (BBU),
  • the network equipment provides communication services for the terminal equipment in the cell.
  • the terminal equipment in the cell communicates with the network equipment through the transmission resources (for example, frequency domain resources, time domain resources, etc.) allocated by the network equipment.
  • the cell may belong to a macro base station (for example, , Macro eNB or Macro gNB, etc.).
  • the side link broadcast and multicast refer to the broadcast or multicast data sent by one terminal device, which can be received by one or more terminal devices.
  • the destination layer 2 ID (Destination Layer-2ID) used when the service data is transmitted on the PC5 interface is predefined.
  • the sending device has the broadcast service data to send, it can be sent directly through the user plane protocol stack, and the broadcast service is filled in the media access control (MAC) layer and/or the physical layer (PHY) layer Corresponding Destination Layer-2ID.
  • the terminal device interested in the broadcast service can monitor whether there is the service data of the Destination Layer-2ID corresponding to the broadcast service at the PHY layer, and receive and analyze the service data, but this application is not limited to this.
  • Unicast is a one-to-one communication method for terminal devices.
  • the sending device instructs the receiving device of the unicast data it sends through the destination address.
  • the receiving device determines whether the unicast data is sent to itself according to the destination address of the unicast data. Data, and determine which device sent the unicast data according to the source address of the unicast data.
  • two terminal devices can establish a unicast connection between the two devices through signaling interaction, and unicast communication can be performed after the establishment of the unicast connection is completed.
  • the sidelink mode1 means that the terminal device determines the resources used to send the sidelink data according to the sidelink scheduling grant (sidelink grant) sent by the network device.
  • the side link scheduling authorization is used to authorize resources dedicated to the terminal device to send side link data. For example, before sending the side link, the terminal device reports a buffer status report (BSR) to the network device to notify the network device of the amount of data to be sent, and the network device authorizes corresponding resources for it according to the amount of data reported by the terminal device.
  • BSR buffer status report
  • Side link mode2 means that the network device pre-allocates side link resources for competition. Multiple terminal devices can compete for resources in the side link resources used for competition. In the case of resource competition, the terminal The device can send side-link data on the resources obtained by the competition. For example, the terminal device selects unoccupied resources for transmission based on measuring whether each time-frequency resource in the resources used for the side link is occupied, but the application is not limited to this.
  • the present application proposes that multiple terminal devices communicating through a side link can reduce power consumption by agreeing on sending and receiving behaviors and maintaining timers between the sending device and the receiving device.
  • Fig. 2 is a schematic flowchart of a side link communication method provided by an embodiment of the present application.
  • S210 The first terminal device sends the first data to the second terminal device.
  • the second terminal device receives the first data from the first terminal device.
  • the first terminal device also sends control information to the second terminal device.
  • the control information may be the first sidelink control information (SCI).
  • SCI is taken as an example for illustration, but this application is not limited to this.
  • the first SCI is used to instruct the first terminal device to schedule the first data.
  • the first data corresponds to a first HARQ process.
  • the first SCI includes an identifier of the first HARQ process.
  • the first data may be sidelink communication data between the first terminal device and the second terminal device.
  • the first data includes a MAC protocol data unit (protocol data unit, PDU) or transmission block ( Transport block (TB)
  • PDU protocol data unit
  • TB transmission block
  • PSSCH physical sidelink shared channel
  • S220 The first terminal device starts or restarts timer A (ie, an example of the first timer), and the second terminal device starts or restarts timer A (ie, an example of the third timer).
  • the timing duration of the first timer maintained by the first terminal device and the third timer maintained by the second terminal device are the same, that is, both are timer A.
  • the first terminal device After the first terminal device sends the first signal, the first terminal device starts or restarts the timer A, and after the second terminal device receives the first signal, the second terminal device starts or restarts the timer A.
  • the first signal is the first SCI or first data. That is, the timer A corresponds to the first HARQ process, and after the first terminal device sends the first SCI or first data corresponding to the first HARQ process, the timer A is started or restarted.
  • the second terminal device After receiving the first SCI or the first data corresponding to the first HARQ process, the second terminal device starts or restarts the timer A.
  • the first terminal device starts or restarts timer A after sending the first data
  • the second terminal device starts or restarts timer A after receiving the first data
  • the first terminal device starts or restarts timer A after sending the first SCI, and correspondingly, the second terminal device starts or restarts timer A after receiving the first SCI.
  • timer A is used to indicate the time interval during which the first terminal device does not send a signal, or in other words, for the second terminal device, timer A is used to instruct the second terminal device not to monitor the signal from the first terminal device.
  • the signal may include indication information and/or data.
  • the first terminal device does not send indication information and/or data during the operation of timer A.
  • the first terminal device does not send a signal for a period of time after sending the first SCI or the first data, which can reduce the power consumption of the first terminal device.
  • the second terminal device does not send a signal when the first terminal device does not send a signal.
  • the signal from the first terminal device is not monitored in the segment, which can reduce unnecessary power consumption of the second terminal device.
  • the timer A is used to indicate the time interval before the first terminal device (that is, the sending device that sends data) can send the first information, or in other words, the timer A is used to indicate the second terminal
  • the time before the device can receive the first information. That is, the first terminal device does not send the first information during the operation of the timer A maintained by the first terminal device, and accordingly, the second terminal device does not monitor the first information during the operation of the timer A maintained by the second terminal device. In other words, the first terminal device sends the first information after the timer A maintained by the first terminal device expires. Accordingly, the second terminal device monitors the first information after the timer A maintained by the second terminal device expires.
  • the first information is used to indicate that the first terminal device schedules retransmission data of the first data, or the first information is used to indicate that the first terminal device schedules retransmission data corresponding to the first HARQ process.
  • the first information is SCI.
  • the duration of timer A may be specified by the protocol or pre-configured.
  • the duration of the timer A is pre-configured for the network device establishing a connection with the first terminal device and/or the second terminal device for the first terminal device and/or the second terminal device, but the application is not limited to this.
  • the timer A is determined by the first terminal device and configured by the first terminal device for the second terminal device.
  • the first terminal device may determine the duration of the timer A according to the preparation time required before sending the retransmission data, and notify the second terminal device.
  • the first terminal device may determine the duration of the timer A according to the instruction of the network device, but the application is not limited to this.
  • the timer A is determined by the second terminal device and configured by the second terminal device for the first terminal device.
  • the second terminal device may determine the duration of the timer A according to the preparation time required to process the data after receiving the data corresponding to a HARQ process, and notify the first terminal device.
  • the second terminal device may determine the duration of the timer A according to an instruction of the network device, but the application is not limited to this.
  • the time when the timer A is started or restarted may be but not limited to one of the following times:
  • the end time of a preset time interval after the last symbol of the first signal is carried.
  • the first terminal device and the second terminal device both start or restart the timer A at the end of the last symbol carrying the first data.
  • the first terminal device and the second terminal device both start or restart the timer A after a preset time interval after the last symbol of the first SCI is carried, but the application is not limited to this. According to the above solution, the first terminal device and the second terminal device can reach an agreement on the timing of starting or restarting the timer.
  • the start of the timer can be understood as the first start of the timer.
  • the restart of the timer can be understood as when the timer has been running for a period of time and is in a stopped state (that is, the timer is at a value between 0 and the maximum value), restarting the timer from the initial value.
  • restarting the timer can be understood as when the timer has been running for a period of time and is in a stopped state, restarting the timer to continue counting from the current value.
  • this application takes a timer as an example for description.
  • it may be a device or module that can be used to measure the length of time, such as a timer and a counter.
  • the timer in this application can be replaced with a time interval, where the time of starting or restarting the timer can be understood as the starting point of the time interval; while the timer is running, it can be understood as being within the time interval; stopping timing
  • the timer can be understood as the stop of the function, action or operation corresponding to the time interval within the time interval; the timer expires, which can be understood as after the time interval ends, but the application is not limited to this.
  • the first HARQ process may be HARQ feedback enable (enable) or HARQ feedback disable (disable).
  • the radio bearer (RB) of the side link can be configured to enable HARQ feedback, and the HARQ process corresponding to the data of the radio bearer is corresponding to HARQ feedback enable.
  • the radio bearer (RB) of the side link can be configured as HARQ feedback disabling, and the HARQ process corresponding to the data of the radio bearer is correspondingly HARQ feedback disabling, but this application does not Limited to this.
  • the first SCI includes a HARQ feedback indication field, and the HARQ feedback indication field is used to indicate whether HARQ feedback of the first HARQ process is enabled.
  • the first data corresponding to the HARQ process, and the HARQ feedback indication field in the first SCI indicates that the first HARQ process is disabled, and the first terminal device starts or restarts timer A after sending the first signal.
  • the second terminal device determines that the HARQ feedback of the first HARQ process is disabled according to the HARQ feedback indication field in the first SCI, and then the second terminal device starts or restarts the timer A after receiving the first signal.
  • the first terminal device starts or restarts timer A after sending the first signal
  • the second terminal device starts or restarts timer A after receiving the first signal.
  • the number of the first terminal and the second terminal device can reach an agreement on the timing of starting the timer, which reduces unnecessary power consumption of the terminal device and saves power.
  • the HARQ feedback of the first HARQ process is enabled.
  • the specific implementation can include but is not limited to the following two ways:
  • Manner 1 The first terminal device starts or restarts the timer A after receiving the HARQ feedback information from the second terminal device.
  • the second terminal device starts or restarts the timer A after sending the HARQ feedback information, where the HARQ feedback information indicates successful reception of the first data (for example, the HARQ feedback information indicates ACK) or unsuccessful reception of the first data
  • the HARQ feedback information indicates NACK.
  • the first terminal device starts or restarts the timer A after receiving the HARQ feedback information from the second terminal device.
  • the second terminal device starts or restarts the timer A after sending the HARQ feedback information.
  • Manner 2 The second terminal device determines that the first data has not been successfully received, sends to the first terminal device the HARQ feedback information indicating that the HARQ was not successfully received, and starts timer A, and accordingly, the first terminal device receives the instruction to the second terminal After the device fails to receive the HARQ feedback information of the first data, it starts or restarts the timer A.
  • the first terminal device and the second terminal device start or restart the timer A.
  • the first terminal device and the second terminal device do not start or restart the timer A.
  • the second terminal device successfully receives the first data, the second terminal device does not send HARQ feedback information, but the application is not limited to this.
  • the start or restart of the timer A by the first terminal device and the second terminal device may be the end time of the last symbol carrying the HARQ feedback information or the start time of the first symbol after the HARQ feedback information.
  • the second terminal device receives the first SCI from the first terminal device, receives the first data according to the first SCI, but fails to decode the first data.
  • the HARQ feedback indication field in the first SCI indicates that HARQ feedback of the first HARQ process is enabled, then the second terminal device sends HARQ feedback information to the first terminal device, and the HARQ feedback information indicates the second terminal device The first data was not successfully received.
  • the second terminal device starts or restarts the timer A at the end of the last symbol carrying the HARQ feedback information.
  • the first terminal device starts or restarts the timer A at the end of the last symbol of the HARQ feedback information.
  • the first terminal device starts timer A after receiving the HARQ feedback information
  • the second terminal device starts or restarts timer A after sending the HARQ feedback information.
  • the number of the first terminal and the second terminal device are made to agree on the timing of starting the timer, which reduces unnecessary power consumption of the terminal device and saves power.
  • the condition for starting or restarting timer A further includes that the first HARQ process has not been released. That is, after the first terminal device receives the HARQ feedback information and determines that the first HARQ process has not been released, the first terminal device starts or restarts the timer A. Correspondingly, after the second terminal device sends the HARQ feedback information and determines that the first HARQ process has not been released, the second terminal device starts or restarts the timer A. It can avoid unnecessary power consumption caused by the terminal device still starting or restarting the timer after the first HARQ process is released.
  • the unreleased first HARQ process may include, but is not limited to: the number of retransmissions of the first data does not reach the maximum number of retransmissions, and/or there are retransmission resources of the first data.
  • the first terminal device does not send the first information during the operation of the timer A maintained by the first terminal device, that is, the first terminal device can send the first information only after the timer A expires.
  • the second terminal device does not monitor the first information during the operation of the timer A maintained by the second terminal device, and starts to monitor the first information after the timer A expires.
  • the data processing time of the terminal device is considered, and the timer A does not monitor or does not Sending the first information corresponding to the first HARQ process can avoid unnecessary power consumption of the terminal device and save power.
  • Fig. 3 is another schematic flowchart of a side link communication method provided by an embodiment of the present application.
  • S310 The first terminal device sends the first data to the second terminal device.
  • the second terminal device receives the first data from the first terminal device.
  • the first terminal device further sends a first SCI to the second terminal device, where the first SCI is used to instruct the first terminal device to schedule the first data.
  • the first data corresponds to the first HARQ process.
  • the HARQ feedback of the first HARQ process is enabled.
  • S320 The first terminal device starts or restarts timer B (ie, another example of the first timer).
  • the first terminal device starts or restarts the timer B after sending the first SCI or the first data. That is, the timer B corresponds to the first HARQ process. After the first terminal device sends the first SCI or first data corresponding to the first HARQ process, it starts or restarts the timer corresponding to the first HARQ process. ⁇ B. While the timer B is running, the first terminal device does not send the first information. In other words, the first terminal device can send the first information only after the timer B expires.
  • the timer B is used to indicate the time interval before the first terminal device can send the first information to the second terminal device.
  • the first terminal device does not send the first information to the second terminal device during the operation of the timer B, that is, the first terminal device sends the first information to the second terminal device after the timer B expires.
  • the first information is used to indicate that the first terminal device schedules retransmission data of the first data, or the first information is used to indicate that the first terminal device schedules retransmission data corresponding to the first HARQ process.
  • the first information is SCI.
  • the time when the first terminal device starts or restarts the timer B may include, but is not limited to, one of the following:
  • the start time of the first SCI or the first symbol after the first data is the start time of the first SCI or the first symbol after the first data
  • the second terminal device sends HARQ feedback information to the first terminal device.
  • the second terminal device may determine that the HARQ feedback of the first HARQ process is enabled according to the HARQ feedback indication field in the first SCI.
  • the second terminal device receives the first data according to the instruction of the first SCI, determines whether the first data is correctly decoded, and sends HARQ feedback information to the first terminal device.
  • S340 The second terminal device starts or restarts the timer C (ie, another example of the third timer).
  • the second terminal device After sending the HARQ feedback information, the second terminal device starts or restarts the timer C.
  • the second terminal device does not monitor the first information from the first terminal device, that is, the control information for scheduling the retransmission data corresponding to the first HARQ process, or in other words, the second terminal device is in the timer C starts to monitor the first message after the timeout. That is, the timer C corresponds to the first HARQ process, and after receiving the first SCI or first data corresponding to the first HARQ process, the second terminal device starts or restarts the first HARQ process corresponding to the first HARQ process. Timer C.
  • the timing duration of the first timer (ie timer B) maintained by the first terminal device and the third timer (ie timer C) maintained by the second terminal device are different.
  • the second terminal device starts or restarts the timer C after sending the HARQ feedback information.
  • the HARQ feedback information indicates that the second terminal device successfully receives the first data or unsuccessfully receives the first data.
  • the second terminal device starts or restarts the timer C after sending the HARQ feedback information.
  • the second terminal device determines that the first data is not successfully received, and sends HARQ feedback information to the first terminal device.
  • the HARQ feedback information indicates that the second terminal device did not successfully receive the first data, and the second terminal device starts Or restart the timer C.
  • the second terminal device starts or restarts the timer C after sending the HARQ feedback information.
  • the second terminal device does not start or restart the timer C when successfully receiving the first data.
  • the timer C is used to indicate the minimum time interval before the second terminal device can monitor the first information from the first terminal device.
  • the second terminal device does not monitor the first information sent by the first terminal device during the operation of the timer C, that is, the second terminal device monitors the first information after the timer C expires.
  • the first information is used to indicate that the first terminal device schedules retransmission data of the first data, or the first information is used to indicate that the first terminal device schedules retransmission data corresponding to the first HARQ process.
  • the first information is SCI.
  • the aforementioned timer C is used to indicate the minimum time interval before the second terminal device can monitor the first information from the first terminal device. It can be understood that the value indicated by the timer C represents the minimum time interval between the moment when the second terminal device can monitor the first information and the current moment, that is, the first terminal device will not send before the timer C expires.
  • the first message the first message can be sent after the timer C expires, but the first message is not necessarily sent immediately after the timer C expires, it can be sent after a period of time after the timer C expires, or not sent.
  • the value indicated by the timer C is the minimum time interval before the second terminal device can monitor the first information.
  • timers A and B are the same or similar to those of timer C. For the sake of brevity, I will not repeat them again.
  • duration of the timer in this application refers to the maximum value that the timer can indicate, and the value indicated during the operation of a timer is less than the duration of the timer.
  • the time when the second terminal device starts or restarts the timer C may include, but is not limited to, one of the following:
  • the timer B is started after the first SCI or the first data
  • the timer C is started after the HARQ feedback information
  • the restart time is different, but the stop time is the same, that is, the timeout time of the timer B and the timer C are the same, so that the first terminal device and the second terminal device can reach a consensus on the reception and transmission of the signal.
  • the first network device that establishes a connection with the first terminal device and the second network device that establishes a connection with the second terminal device negotiate the durations of timer B and timer C, so that the timeout time is agreed upon .
  • the first network device configures the duration of the timer B for the first terminal device
  • the second network device configures the duration of the timer C for the second terminal device.
  • the first network device and the second network device may be the same network device, that is, the first terminal device and the second terminal device are connected to the same network device, but the present application is not limited to this.
  • the first terminal device determines the duration of timer B and timer C and notifies the second terminal device, or the second terminal device determines the duration of timer B and timer C and notifies the first terminal device. Terminal Equipment.
  • the first terminal device determines the duration of the timer C and informs the second terminal device.
  • the first terminal device determines the duration of the timer C according to the duration of the timer C and the difference between the HARQ feedback information and the first SCI or first data.
  • the time difference determines the duration of timer B.
  • the first terminal device determines the duration of timer B and notifies the second terminal device, the second terminal device determines the timing according to the duration of timer B and the time difference between the HARQ feedback information and the first SCI or the first data The duration of ⁇ C.
  • the second terminal device determines the duration of timer B or timer C and informs the first terminal device, and the first terminal device determines another timer according to the time difference between the HARQ feedback information and the first SCI or the first data The duration of the device.
  • the determination of the duration of timers A, B, and C may consider the length of time required for the second terminal device to process data and/or the length of time required for the first terminal device to prepare to retransmit data, but the application is not limited to this .
  • the condition for starting or restarting the timer C may include not only sending HARQ feedback information, but also including that the first HARQ process has not been released. That is, after the second terminal device sends the HARQ feedback information and determines that the first HARQ process has not been released, the second terminal device starts or restarts the timer C.
  • the first terminal device and the second terminal device start or restart the second timer maintained by each, and the second timer is used to indicate that the first HARQ process can be transmitted Corresponding time interval for retransmitting data.
  • the second timer is used to indicate the time interval at which the first terminal device can send the retransmission data corresponding to the first HARQ process, or in other words, the second timer is used to indicate that the second terminal device can receive the first HARQ process.
  • the time interval for retransmitting data corresponding to a HARQ process is used to indicate that the first HARQ process.
  • the first terminal device can send the first information within a period of time, so that the second terminal device can determine that the first terminal device sends the retransmission within the period of time Detecting the retransmitted data based on the data can make the terminal devices performing side-link communication have a consistent understanding of the received and sent data, reduce unnecessary power consumption of the terminal devices, and save power.
  • the second terminal device may determine that the HARQ feedback of the first HARQ process is enabled according to the first SCI, and the third timer expires, and After sending the HARQ feedback information (for example, NACK) indicating that the first data was not successfully received, start or restart the second timer maintained by the second terminal device; accordingly, the first terminal device times out the first timer, and After receiving the HARQ feedback information indicating that the first data is not successfully received, start or restart the second timer maintained by the first terminal device.
  • the HARQ feedback information indicates that the first data is successfully received
  • the first terminal device and the second terminal device do not start or restart the second timer.
  • the second timer is started or restarted to receive the retransmitted data corresponding to the first HARQ process, and the first data is successfully received at the second terminal device If the second timer is not started or restarted afterwards, it can make the terminal devices performing side-link communication have a consistent understanding of the received and sent data, reduce unnecessary power consumption of the terminal device, and save power.
  • the first terminal device may send the first data to one second terminal device, or the first terminal device may also send the first data to multiple second terminal devices, for example, the first terminal device multicasts the first data After the first data, after the first timer expires, when the number of NACK feedback from multiple second terminal devices received by the first terminal device is greater than or equal to the first threshold, or the first terminal device In the case where the energy of the received NACK feedback from multiple second terminal devices is greater than or equal to the second threshold, the first terminal device starts or restarts the second timer.
  • the physical layer of the first terminal device sends an indication of the number of NACK feedback (or the number of second terminal devices that feedback NACK) or the energy of the received NACK feedback to the media access control (MAC) layer
  • the MAC layer of the first terminal device determines whether to start or restart the second timer. For example, the MAC layer determines, according to the indication information, that the number of received NACK feedback is greater than or equal to the first threshold, and determines to start or restart the second timer.
  • the MAC layer determines according to the indication information that the energy of the received NACK feedback is greater than or equal to the second threshold, and determines to start or restart the second timer.
  • the first threshold or the second threshold may be protocol-specified, network-configured, or pre-configured.
  • the first terminal device when the HARQ feedback of the first HARQ process is disabled, the first terminal device starts or restarts the second timer after the first timer expires.
  • the second terminal device may determine that the HARQ feedback of the first HARQ process is disabled according to the first SCI, and start or restart the second timer after the third timer expires.
  • the second timer is started after the first timer expires, so that the first terminal device can send this to the second terminal device while the second timer is running.
  • the corresponding second terminal device may receive the retransmission data corresponding to the first HARQ process sent by the first terminal device during the running period of the second timer. It can make the terminal devices that perform side-link communication have a consistent understanding of sending and receiving data, reduce unnecessary power consumption of the terminal devices, and save power.
  • the first terminal device determines the data (for example, MAC protocol data unit (protocol data unit, PDU) or transport block (transport block, TB)) corresponding to the first HARQ process
  • the data for example, MAC protocol data unit (protocol data unit, PDU) or transport block (transport block, TB)
  • PDU protocol data unit
  • transport block transport block
  • the second terminal device determines that the number of transmissions or the number of retransmissions of the data (for example, MAC PDU or TB) corresponding to the first HARQ process is less than or equal to a preset maximum value
  • the second terminal device starts or restarts the second timer.
  • the second terminal device does not start or restart the second timer.
  • the second timer corresponding to the first HARQ process is not started or restarted, that is, the retransmission data corresponding to the HARQ process is no longer transmitted.
  • the "equal” case when the value is compared with the threshold or threshold value, can be the same as the "greater than” case, or it can be the same as the “less than” case.
  • the operations performed below are the same, which is not limited in this application.
  • the condition for the first terminal device and the second terminal device to start or restart the second timer further includes that the first HARQ process is not released. That is, when the first terminal device times out and the first HARQ process is determined to be not released, the first terminal device starts or restarts the second timer.
  • the second terminal device starts or restarts the second timer when the third timer expires and it is determined that the first HARQ process has not been released.
  • this implementation manner can also be implemented in combination with the HARQ feedback of the first HARQ process being enabled and/or disabled, that is, the first terminal device and the second terminal device determine whether the first HARQ process is enabled or not. Release, and in the case of not being released, determine whether the first HARQ process is enabled, so as to determine whether to start or restart the second timer, but the application is not limited to this.
  • multiple terminal devices performing sidelink communication do not receive or transmit the first information corresponding to the first HARQ process within a period of time after sending the first data, and pass the second information after the period of time.
  • the timer limits the length of time that the retransmission data can be sent, and on the basis that multiple terminal devices have the same understanding of data transmission, unnecessary power consumption of the terminal device can be further avoided.
  • the first terminal device when the first terminal device starts the first timer (for example, timer A or timer B) corresponding to the first HARQ process, it stops the first HARQ maintained by the first terminal device.
  • the second timer corresponding to the process, and correspondingly, when the second terminal device starts the third timer (for example, timer A or timer C) corresponding to the first HARQ process, it stops the first timer maintained by the second terminal device.
  • the second timer corresponding to the HARQ process.
  • the foregoing embodiment in FIG. 2 or the embodiment in FIG. 3 can also be implemented in combination with the discontinuous reception DRX operation of the side link.
  • the discontinuous reception operation of the side link means that the terminal device can discontinuously monitor the SCI according to the configuration information of the discontinuous reception operation.
  • the discontinuous operation of the side link can be configured with one or more of the following parameters:
  • the maximum duration of timer D (that is, an example of the fourth timer) is the length of time that the terminal device is in the DRX active time at the beginning of each cycle of DRX operation;
  • the maximum duration of the timer E (that is, another example of the fourth timer) is the length of time that the terminal device is in the DRX activation time after receiving the second SCI, and the second SCI is used to indicate a new data transmission.
  • the second terminal device in the embodiment of the present application can perform discontinuous reception, that is, the second terminal device is a receiving device for DRX operation control information or data, and the first terminal device can be a DRX operation sending control information or data. equipment.
  • the second terminal device starts the timer D at the beginning of each first period, and detects the SCI during the operation of the timer D. After receiving the second SCI within the DRX activation time, the second terminal device starts the timer E, and detects the SCI while the timer E is running.
  • the first terminal device also starts the timer D at the beginning of each period of discontinuous reception by the second terminal device, and starts the timer E after sending the second SCI, and sends the timer D to the second terminal device within the DRX activation time of the second terminal device.
  • the second terminal device sends SCI or data.
  • the configuration information of the DRX operation may further include the maximum duration of the third timer and/or the maximum duration of the second timer.
  • the second terminal device is at the active time of the DRX operation during the running period of the second timer, and the third timer running period is the inactive time of the DRX operation.
  • the DRX operation can also be configured with a second period, and the second period is smaller than the first period.
  • a timer F corresponding to the DRX operation in the second cycle, and the maximum duration of the timer F is the maximum time length during which the terminal device can apply the DRX operation in the second cycle.
  • the terminal device stops applying the DRX operation in the second cycle, and starts the DRX operation in the first cycle. That is, after the timer F expires, the terminal device changes (or switches) the cycle of the DRX operation from the second cycle to the first cycle.
  • timer D and timer E are applicable to both the first cycle and the second cycle.
  • the first terminal device and the second terminal device start the timer D at the beginning of each second cycle, and the first terminal device sends the second SCI Then the timer E is started, and after the second terminal device receives the second SCI, the timer E is started.
  • the first terminal device and the second terminal device are respectively used as the transmitting device and the receiving device of the DRX operation to perform the DRX operation. Consistent understanding, reduce unnecessary power consumption of terminal equipment, and save power.
  • the first terminal device may receive instruction information A from the second terminal device, and the instruction information A is used to indicate to start the DRX operation of the second cycle or change the DRX operation from the first cycle to the second cycle.
  • the first terminal device starts the DRX operation of the second cycle and starts the timer F corresponding to the second cycle after receiving the indication information A, and the DRX operation of the second cycle can be applied during the operation of the timer F.
  • the second terminal device starts the timer F after sending the instruction information A, and applies the DRX operation of the second cycle during the running of the timer F. After the timer F expires, the first terminal device and the second terminal device change (or switch) the cycle of the DRX operation from the second cycle to the first cycle.
  • the first terminal device may send the instruction information A to the second terminal device.
  • the DRX operation of the second period is started and the timer F is started.
  • the timer F Apply the second cycle of DRX operation.
  • the second terminal device starts the timer F after receiving the instruction information A from the first terminal device, and applies the DRX operation of the second cycle during the running of the timer F.
  • the first terminal device and the second terminal device change (or switch) the cycle of the DRX operation from the second cycle to the first cycle.
  • the first terminal device may receive instruction information B from the second terminal device, the instruction information B is used to instruct to start the DRX operation of the first cycle, and the first terminal device stops timing after receiving the instruction information B Device F and start the DRX operation of the first cycle.
  • the second terminal device stops the timer F after sending the indication information B to start the DRX operation in the first cycle.
  • the first terminal device is performing a DRX operation in the second cycle, and the timer F is running.
  • the first terminal device can send control information or data to the second terminal device within the DRX activation time of each period (the second period).
  • the first terminal device Stop the timer F and change (or switch) the cycle of the DRX operation from the second cycle to the first cycle.
  • the first terminal device may send the instruction information B to the second terminal device. After the first terminal device sends the instruction information B, the timer F is stopped and the DRX operation in the first cycle is started. Correspondingly, after receiving the instruction information B from the first terminal device, the second terminal device stops the timer F and starts the DRX operation in the first cycle.
  • the terminal device performing side-link communication can switch the cycle of the side-link DRX operation through the indication information A according to service requirements, which reduces the power consumption of the terminal device and increases the flexibility of data transmission and reception.
  • the second terminal device in this application may be one or more.
  • the first terminal device performs sidelink multicast or broadcast
  • multiple second terminal devices receive the multicast from the first terminal device.
  • the indication information A and/or the indication information B may be a MAC control element (CE), for example, the indication information A may be written as DRX Command MAC CE or SL DRX Command MAC CE, the indication information B can be written as Long DRX Command MAC CE or SL Long DRX Command MAC CE, but this application is not limited to this.
  • CE MAC control element
  • the first terminal device and the second terminal device stop the timer D and/or the timer E.
  • the behaviors of the sending device and the receiving device are kept consistent, which can reduce the power consumption of the terminal device and save power while ensuring normal communication.
  • FIG. 5 is a schematic flowchart of another example of a side link communication method provided by an embodiment of the present application.
  • S510 The first terminal device determines to send second information, where the second information is used to instruct to stop the fourth timer.
  • the running period of the fourth timer is the activation time of the DRX operation between the second terminal device and the first terminal device.
  • the second information may be indication information A or indication information B
  • the fourth timer may include but is not limited to timer D and/or timer E.
  • the first terminal device instructs the second terminal device to stop the fourth timer through the second information, so that the DRX operation between the first terminal device and the second terminal device enters the inactive time, which enables the first terminal device In the case that the DRX operation condition is not met, it is instructed to stop the fourth timer in time to reduce unnecessary power consumption of the terminal device.
  • the first terminal device may determine to send the second information according to one or more of the following conditions:
  • the power of the first terminal device is less than or equal to the threshold, the service demand of the first terminal device instructs to stop the fourth timer, the number of unicast connections established by the first terminal device is greater than or equal to the threshold, or the SL link quality is less than or Equal to the threshold.
  • this S510 may be performed by the MAC layer of the first terminal device.
  • the MAC layer of the first terminal device may determine whether to send the second information according to whether the condition for sending the second information is satisfied, or the first terminal device It may be determined whether to send the second information according to the received instruction information C.
  • the instruction information C may come from a physical layer, a radio resource control (radio resource control, RRC) layer, or a V2X layer.
  • RRC radio resource control
  • the first terminal device determines (or selects) the first resource for sending the second information to send the second information.
  • the first terminal device starts a fifth timer after determining to send the second information.
  • the running period of the fifth timer is the time when the first terminal device can send the second information, that is, the first terminal device needs to determine the first resource during the running period of the fifth timer and send the information on the first resource. Second information.
  • the first terminal device stops the fifth timer after sending the second information. If the first terminal device does not determine (or select) the first resource during the operation of the fifth timer, or in other words, the first terminal device does not send the second information after the fifth timer expires, the first terminal device does not Send the second information to save power consumption.
  • the second information is used to indicate to stop a cycle (for example, the cycle in which the DRX operation is being performed, or the next cycle of the cycle in which the DRX operation is being performed, may be referred to as cycle A, but the application is not limited to this)
  • the period length of period A can be the first period or the second period. If the first terminal device does not determine (or select) the first resource before the end of the period A, the first terminal device does not send the second information. Since the period of the second information has ended, the first terminal device does not need to send the second information again, so as to save power consumption.
  • the method for the first terminal device to select the first resource includes but is not limited to one or more of the following.
  • S520 The first terminal device sends third information to the first network device, where the third information is used to request the first resource.
  • the first network device receives the third information from the first terminal device.
  • the first network device is a network device that establishes a wireless communication connection for the first terminal device.
  • the third information may be a scheduling request (scheduling request, SR).
  • the first terminal device sends the third information to the first network device on a second resource, where the second resource is a dedicated resource for sending the third information. That is, the second resource is a dedicated resource used by the first terminal device to send request information for requesting the first resource (that is, the third information).
  • the first terminal device may receive eighth information from the first network device, and the eighth information is used to configure the second resource.
  • the eighth information includes the identifier of the SR configuration information, the SR configuration information corresponding to the identifier is used to configure one or more SR resources, and the second resource is one of the one or more SR resources, but This application is not limited to this.
  • S521 Fourth information sent by the first network device to the first terminal device, where the fourth information is used to indicate the first resource.
  • the first terminal device receives fourth information from the first network device, and the terminal device determines the first resource according to the fourth information.
  • S520 The first terminal device determines the first resource in configuring authorized resources.
  • the first network device configures a configured grant (CG) resource for the first terminal device, and the first terminal device determines the first resource used to send the second information in the configured grant resource.
  • CG configured grant
  • the first terminal device starts the fifth timer, and the first resource is a configuration authorized resource during the running period of the fifth timer. If the configured authorized resource is not included in the duration range of the fifth timer, the first terminal device does not send the second information.
  • the second indication information indicates to stop the fourth timer in period A, and the first resource is a configured authorized resource in period A. If the configured authorized resource is not included in the period A, the first terminal device does not send the second information.
  • the first terminal device determines a first resource among side link resources used for contention.
  • the first terminal device adopts the sidelink mode2 transmission mode, competes for resources among the sidelink resources configured by the first network device for contention, and determines the contented resource as the first resource, or in other words, The first terminal device sends the second information on the resource obtained by the competition.
  • the first terminal device starts the fifth timer, and if the first terminal device competes for a resource during the operation of the fifth timer, the contented resource may be used as the first resource to send the second information; if The first terminal device does not compete for resources during the running period of the fifth timer or does not include sidelink resources used for contention during the running period of the fifth timer, then the first terminal device does not send the second information.
  • the second information indicates to stop the fourth timer in period A. If the first terminal device competes for the resource of period A, the contented resource may be used as the first resource to send the second information; If a terminal device does not compete for resources in period A or does not include side link resources for contention in period A, the first terminal device does not send the second information.
  • the first terminal device determines the first resource in one of the foregoing manners, so that the terminal device has resources to send the second information, so as to stop the fourth timer in time and avoid unnecessary power consumption of the terminal device. After determining the first resource, the first terminal device executes S530.
  • the first terminal device sends the second information to the second terminal device on the first resource.
  • the second terminal device receives the second information from the first network device carried on the first resource.
  • the first terminal device determines whether the event for sending the second information is cancelled, and if there is no cancellation, the first terminal device sends a message to the first resource.
  • the second terminal device sends the second information.
  • S540 may be executed to send sixth information to the second network device, where the sixth information is used to indicate that the second terminal device has received the information from the first terminal device. Stop the fourth timer information. Or the sixth information is used to indicate that the second terminal device requests to stop the fourth timer (that is, the timer between the second terminal device and the first terminal device).
  • S540 is performed when the second terminal device is in the RRC connected state or the second terminal device adopts the side link mode 1 transmission mode.
  • the sixth information is one or more of RRC message, MAC CE, or uplink control information (UCI).
  • the second terminal device performs a DRX operation with the first terminal device
  • the second terminal device may be a terminal device that performs discontinuous reception in the DRX operation.
  • the first terminal device may be a sending device of control information or data in the DRX operation.
  • the first terminal device may be a terminal device that performs discontinuous reception in the DRX operation
  • the corresponding second terminal device may be a sending device of control information or data in the DRX operation.
  • Fig. 6 is a schematic diagram of another example of a side link communication method provided by an embodiment of the present application.
  • S610 Establish a unicast connection between the first terminal device and the second terminal device.
  • the first terminal device and the second terminal device can communicate by establishing a unicast connection.
  • S620 The first terminal device exchanges capability information with the second terminal device.
  • the first terminal device and the second terminal device After the first terminal device and the second terminal device establish a unicast connection, they can exchange mutual capability information.
  • the first terminal device sends a request message for capability information to the second terminal device, and the second terminal device sends the capability information of the second terminal device to the first terminal device after receiving the request message.
  • the request message may also include capability information of the first terminal device.
  • the capability information may be capability information related to side link communication.
  • the capability information related to the side link includes but is not limited to one or more of the following:
  • the capability of the terminal device that establishes the side link is determined through capability interaction, so that subsequent communication can proceed normally.
  • the first terminal device may send a first message to the first network device in S630.
  • the first message may be a side link message of the terminal device, for example, the side link message of the terminal device may be written as SidelinkUEInformation.
  • the first message may be in a terminal device assistance message, for example, the terminal device assistance message may be written as UEAssistanceInformation, or the first message may be in another RRC message.
  • the first message includes seventh information
  • the seventh information is used to indicate that the first terminal device needs to send the second information (for example, the second information in the above implementation of FIG. 5).
  • the seventh information may include identification information of the second terminal device (for example, layer 2 identification, etc.) to notify the first network device that the first terminal device needs to send the second information to the second terminal device .
  • the seventh information may also include one or more of whether the second information supports HARQ feedback, the maximum number of transmissions of the second information, or the length of the second information, but the application is not limited thereto.
  • the first network device sends a second message to the first terminal device in S640.
  • the second message includes eighth information, and the eighth information is used to configure the second resource in the embodiment of FIG. 5, for example, the eighth information includes the identifier of the SR configuration information.
  • the second message may also include configuration information for configuring authorized resources.
  • the configuration authorization resource may be a first type of configuration authorization (configured grant type 1) resource and/or a second type of configuration authorization (configured grant type 2) resource.
  • the terminal device reports sidelink related information to the network device, so that the network device configures the terminal device with resources for the sidelink, so that the terminal device uses the configured resources to perform sidelink communication.
  • the size of the sequence number of each process does not mean the order of execution.
  • the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of this application. .
  • Fig. 7 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • the communication device 700 may include a processing unit 710 and a transceiving unit 720.
  • the communication device 700 may be a terminal device, a vehicle-mounted communication device, or a device included in the terminal device, such as various types of vehicles, or a device included in a terminal device, such as a system chip, etc.; examples In general, the communication device 700 may also be used to implement the network equipment or the system chip in the network device involved in the foregoing embodiments; for example, the communication device 700 may include modules corresponding to the method operations in the foregoing embodiments. , Unit, or means (means), the module, unit, or means can be realized by hardware, by software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above-mentioned functions.
  • the communication device 700 may correspond to the first terminal device in the above method embodiment, or be configured in (or used in) a chip in the first terminal device.
  • the communication device 700 may correspond to the first terminal device in the methods 200, 300, 500, and 600 according to the embodiments of the present application, and the communication device 700 may include a device for executing the foregoing embodiments such as FIG. 2, FIG. 3, and FIG. Units of the method executed by the first terminal device in the methods 200, 300, 500, and 600 in FIG. 5 or FIG. 6.
  • the units in the communication device 700 and the above-mentioned other operations and/or functions are used to implement the corresponding processes of the methods 200, 300, 500, and 600 in FIG. 2, FIG. 3, FIG. 5, or FIG. 6, respectively.
  • the transceiving unit 720 may be used to execute S210 in the method 200, and the processing unit 710 may be used to execute S220 and S230 in the method 200.
  • the transceiving unit 720 can be used to execute S310 in the method 300, and the processing unit 710 can be used to execute S320 in the method 300.
  • the transceiving unit 720 can be used to execute S520 and S521 in the first mode of the method 500, and S530 in the method 500, and the processing unit 710 can be used to execute the steps in the method 500.
  • the transceiving unit 720 can be used to execute S630 and S640 in the method 600
  • the processing unit 710 can be used to execute S610 and S620 in the method 600. It should be understood that the specific process for each unit to execute the foregoing corresponding steps has been described in detail in the foregoing method embodiment, and is not repeated here for brevity.
  • the communication device 700 may correspond to the second terminal device in the above method embodiment, or be configured in (or used in) a chip in the second terminal device.
  • the communication device 700 may correspond to the second terminal device in the methods 200, 300, 500, and 600 according to the embodiments of the present application. Units of the method executed by the second terminal device in the methods 200, 300, 500, and 600 in FIG. 5 or FIG. 6.
  • the units in the communication device 700 and the above-mentioned other operations and/or functions are used to implement the corresponding processes of the methods 200, 300, 500, and 600 in FIG. 2, FIG. 3, FIG. 5, or FIG. 6, respectively.
  • the transceiving unit 720 may be used to execute S210 in the method 200, and the processing unit 710 may be used to execute S220 and S230 in the method 200.
  • the transceiving unit 720 can be used to execute S310 in the method 300, and the processing unit 710 can be used to execute S330 and S340 in the method 300.
  • the transceiver unit 720 can be used to execute S530 and S540 in the method 500.
  • the communication device 700 is used to execute the method 600 in FIG.
  • the processing unit 710 may be used to execute S610 and S620 in the method 600. It should be understood that the specific process for each unit to execute the foregoing corresponding steps has been described in detail in the foregoing method embodiment, and is not repeated here for brevity.
  • the communication device 700 may further include a storage unit, and the storage unit may be used to store instructions or data, and the processing unit 710 may execute the instructions or data stored in the storage unit to enable the communication device to implement corresponding operations.
  • the transceiver unit 720 in the communication device 700 in the communication device 700 may correspond to the transceiver 810 in the terminal device 800 shown in FIG. 8, and the storage unit may correspond to the memory in the terminal device 800 shown in FIG. .
  • the transceiver unit 720 in the communication device 700 can be implemented through a communication interface (such as a transceiver or an input/output interface), for example, it can correspond to the terminal shown in FIG. 8
  • the transceiver 810 in the device 800, the processing unit 710 in the communication device 700 may be implemented by at least one processor, for example, may correspond to the processor 820 in the terminal device 800 shown in FIG.
  • the processing unit 710 may be implemented by at least one logic circuit.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • the transceiver unit 720 in the communication device 700 may be an input/output interface or circuit of the chip, and the processing in the communication device 700
  • the unit 710 may be a processor in a chip.
  • the communication device 700 may correspond to the first network device in the above method embodiment, or be configured in (or used in) a chip in the first network device.
  • the communication device 700 may correspond to the first network device in the methods 500 and 600 according to the embodiments of the present application, and the communication device 700 may include the first network device for executing the methods 500 and 600 in FIG. 5 or FIG. The unit of the method performed by the network device.
  • the units in the communication device 700 and the other operations and/or functions described above are used to implement the corresponding processes of the methods 500 and 600 in FIG. 5 or FIG. 6, respectively.
  • the transceiver unit 720 may be used to execute S520 and S521 in the method 500.
  • the transceiver unit 720 can be used to execute S630 and S640 in the method 600. It should be understood that the specific process for each unit to execute the foregoing corresponding steps has been described in detail in the foregoing method embodiment, and is not repeated here for brevity.
  • the communication device 700 may correspond to the second network device in the above method embodiment, or be configured in (or used in) a chip in the second network device.
  • the communication device 700 may correspond to the second network device in the method 500 according to the embodiment of the present application, and the communication device 700 may include a unit for executing the method executed by the second network device in the method 500 in FIG. 5 .
  • the units in the communication device 700 and the above-mentioned other operations and/or functions are respectively intended to implement the corresponding process of the method 500 in FIG. 5.
  • the transceiver unit 720 may be used to execute S540 in the method 500. It should be understood that the specific process for each unit to execute the foregoing corresponding steps has been described in detail in the foregoing method embodiment, and is not repeated here for brevity.
  • the communication device 700 may further include a storage unit, and the storage unit may be used to store instructions or data, and the processing unit 710 may execute the instructions or data stored in the storage unit to enable the communication device to implement corresponding operations.
  • the transceiving unit 720 in the communication device 700 in the communication device 700 may correspond to the transceiver 910 in the network device 900 shown in FIG. 9, and the storage unit may correspond to the memory in the network device 900 shown in FIG. 9 .
  • the transceiver unit 720 in the communication device 700 can be implemented through a communication interface (such as a transceiver or an input/output interface), for example, it can correspond to the network shown in FIG. 9
  • the transceiver 910 in the device 900, the processing unit 710 in the communication device 700 may be implemented by at least one processor, for example, may correspond to the processor 920 in the network device 900 shown in FIG.
  • the processing unit 710 may be implemented by at least one logic circuit.
  • the transceiver may be a transceiver circuit.
  • the input/output interface may be an input/output circuit.
  • the transceiver unit 720 in the communication device 700 may be an input/output interface or circuit of the chip, and the processing in the communication device 700
  • the unit 710 may be a processor in a chip.
  • FIG. 8 is a schematic structural diagram of a terminal device 800 provided by an embodiment of the present application.
  • the terminal device 800 can be applied to the system shown in FIG. 1 to perform the functions of the terminal device in the foregoing method embodiment.
  • the terminal device 800 includes a processor 820 and a transceiver 810.
  • the terminal device 800 further includes a memory 830.
  • the processor 820, the transceiver 810, and the memory 830 may communicate with each other through internal connection paths to transfer control and/or data signals.
  • the memory is used to store computer programs, and the processor 820 is used to execute the memory 830.
  • the computer program in to control the transceiver 810 to send and receive signals.
  • the terminal device 800 may include a bus system 840, and the transceiver 810, the processor 820, and the memory 830 may transmit information through the bus system 840.
  • the foregoing processor 820 and the memory 830 may be combined into a processing device, and the processor 820 is configured to execute the program code stored in the memory 830 to implement the foregoing functions.
  • the memory may also be integrated in the processor 820 or independent of the processor 820.
  • the processor 820 may correspond to the processing unit in FIG. 7.
  • the above-mentioned transceiver 810 may correspond to the transceiving unit 720 in FIG. 7.
  • the transceiver 810 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). Exemplarily, the receiver is used to receive signals, and the transmitter is used to transmit signals.
  • the terminal device 800 shown in FIG. 8 can implement various processes involving the terminal device in the method embodiments shown in FIG. 2, FIG. 3, or FIG. 5.
  • the operations and/or functions of the various modules in the terminal device 800 are respectively intended to implement the corresponding processes in the foregoing method embodiments.
  • the above-mentioned processor 820 can be used to execute the actions described in the previous method embodiments implemented by the terminal device, and the transceiver 810 can be used to execute the terminal device described in the previous method embodiments to send to or receive from the network device. action.
  • the transceiver 810 can be used to execute the terminal device described in the previous method embodiments to send to or receive from the network device. action.
  • the aforementioned terminal device 800 may further include a power source for providing power to various devices or circuits in the terminal device.
  • the terminal device 800 may also include one or more of an input unit, a display unit, an audio circuit, a camera, and a sensor.
  • the audio circuit may also include a speaker, Microphone etc.
  • FIG. 9 is a schematic structural diagram of a network device 900 provided by an embodiment of the present application.
  • the network device 900 can be applied to the system shown in FIG. 1 or FIG. 2 to perform the functions of the network device in the foregoing method embodiment.
  • the network device 900 includes a processor 920 and a transceiver 910.
  • the network device 900 further includes a memory.
  • the processor 920, the transceiver 910, and the memory may communicate with each other through an internal connection path to transfer control and/or data signals.
  • the memory is used to store a computer program, and the processor 920 is used to execute the information in the memory.
  • the computer program controls the transceiver 910 to send and receive signals.
  • the transceiver 910 of the network device 900 may include an antenna and/or a radio frequency circuit.
  • the network device 900 shown in FIG. 9 can implement various processes involving the network device in the method embodiments shown in FIG. 2, FIG. 3, or FIG. 5.
  • the operations and/or functions of the various modules in the network device 900 are respectively intended to implement the corresponding processes in the foregoing method embodiments.
  • the network device 900 shown in FIG. 9 is only a possible architecture of the network device, and should not constitute any limitation in this application.
  • the method provided in this application can be applied to network devices of other architectures.
  • network equipment including CU, DU, and AAU. This application does not limit the specific architecture of the network device.
  • An embodiment of the present application also provides a processing device, including a processor and a memory.
  • the processor is used to read instructions stored in the memory, and can receive signals through a receiver, and transmit signals through a transmitter, so as to execute the method in any of the foregoing method embodiments.
  • the aforementioned processing device may be one or more chips.
  • the processing device may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), or It is a central processor unit (CPU), a network processor (NP), a digital signal processing circuit (digital signal processor, DSP), or a microcontroller (microcontroller unit). , MCU), it can also be a programmable logic device (PLD) or other integrated chips.
  • FPGA field programmable gate array
  • ASIC application specific integrated circuit
  • SoC system on chip
  • CPU central processor unit
  • NP network processor
  • DSP digital signal processing circuit
  • microcontroller unit microcontroller unit
  • MCU programmable logic device
  • PLD programmable logic device
  • the steps of the above method can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware. In order to avoid repetition, it will not be described in detail here.
  • the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components .
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), Electrically erasable programmable read-only memory (EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic RAM
  • DRAM dynamic random access memory
  • synchronous dynamic random access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory serial DRAM, SLDRAM
  • direct rambus RAM direct rambus RAM
  • the present application also provides a computer program product.
  • the computer program product includes: computer program code.
  • the computer program code When the computer program code is executed by one or more processors, the computer program The device executes the method in the embodiment shown in FIG. 2, FIG. 3, FIG. 5, or FIG. 6.
  • the present application also provides a computer-readable storage medium that stores program code.
  • the program code is run by one or more processors, the processing The device of the processor executes the method in the embodiment shown in FIG. 2, FIG. 3, FIG. 5, or FIG. 6.
  • the present application also provides a system, which includes the aforementioned one or more network devices.
  • the system may also include one or more of the aforementioned terminal devices.
  • the network equipment in the above-mentioned device embodiments completely corresponds to the network equipment or terminal equipment in the terminal equipment and method embodiments, and the corresponding modules or units execute the corresponding steps.
  • the communication unit transmits the receiving or receiving in the method embodiment.
  • the processing unit processor
  • the processing unit processor
  • the computer may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disc, SSD)) etc.
  • the network equipment in the above-mentioned device embodiments completely corresponds to the network equipment or terminal equipment in the terminal equipment and method embodiments, and the corresponding modules or units execute the corresponding steps.
  • the communication unit transmits the receiving or receiving in the method embodiment.
  • the processing unit processor
  • the functions of specific units refer to the corresponding method embodiments. Among them, there may be one or more processors.
  • component used in this specification are used to denote computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution.
  • the component may be, but is not limited to, a process, a processor, an object, an executable file, a thread of execution, a program, and/or a computer running on a processor.
  • the application running on the computing device and the computing device can be components.
  • One or more components may reside in processes and/or threads of execution, and components may be located on one computer and/or distributed between two or more computers.
  • these components can be executed from various computer readable media having various data structures stored thereon.
  • a component may be based on a signal having one or more data packets (for example, data from two components that interact with another component in a local system, a distributed system, and/or a network, such as the Internet that interacts with other systems through a signal) Communicate through local and/or remote processes.
  • data packets for example, data from two components that interact with another component in a local system, a distributed system, and/or a network, such as the Internet that interacts with other systems through a signal
  • the disclosed system, device, and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual couplings or direct couplings or communication connections may be indirect couplings or communication connections between devices or units through some interfaces, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • 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.
  • each functional unit may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented by software, it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions (programs).
  • programs When the computer program instructions (programs) are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website site, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) 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, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

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Abstract

本申请提供了一种无线通信方法和通信装置。该方法包括：第一终端设备向第二终端设备发送第一数据后，启动或重启第一计时器，在该第一计时器运行期间该第一终端设备不向该第二终端设备发送第一信息，该第一信息指示该第一终端设备调度第一HARQ进程对应的重传数据，该第一HARQ进程为该第一数据对应的HARQ进程。相应地，第二终端设备接收到该第一数据后启动或重启第三计时器，在该第三计时器运行期间不接收来自该第一终端设备的该第一信息。以期减小终端设备的功率消耗。

Description

侧行链路的通信方法和通信装置
本申请要求于2020年05月29日提交中国专利局、申请号为202010474835.6、申请名称为“侧行链路的通信方法和通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，并且更具体地，涉及一种侧行链路的通信方法和通信装置。
背景技术
车联网(vehicle to everything，V2X)被认为是物联网体系中最有产业潜力、市场需求最为明确的领域之一，具有应用空间广、产业潜力大、社会效益强的特点，对促进汽车和信息通信产业创新发展，构建汽车和交通服务新模式新业态，推动自动驾驶技术创新和应用，提高交通效率和安全水平具有重要意义。智能交通系统的发展推动了车联网(internet of vehicle，IoV)从仅支持车载信息服务的传统车联网向支持车联一切(vehicle to everything，V2X)服务的下一代车联网发展。V2X系统的应用包括：车辆与车辆(vehicle to vehicle，V2V)，车辆与路边基础设施(vehicle to infrastructure，V2I)，车辆与行人(vehicle to pedestrian，V2P)或车辆与网络(vehicle to network，V2N)等。V2X系统的应用将改善驾驶安全性、减少拥堵和车辆能耗、提高交通效率和车载娱乐信息等。第三代合作伙伴计划(the 3 rd generation partnership project，3GPP)在长期演进(long term evolution，LTE)系统中为V2X制定了相关的通信标准。V2X在新空口(new radio，NR)系统中也同样是讨论的热点课题，NR-V2X需要支持更复杂多样的场景，例如单播、广播和组播的场景。随着应用场景以及业务需求的扩大，V2X设备的功率消耗问题引发了关注。
发明内容
本申请提供一种侧行链路的通信方法和通信装置，以期减小终端设备的功率消耗。
第一方面，提供了一种无线通信方法，该方法可以由第一终端设备或配置于(或用于)第一终端设备的模块(如芯片或处理器)执行，以下以该方法由第一终端设备执行为例进行说明。
该方法包括：第一终端设备向第二终端设备发送第一数据，该第一数据与第一混合自动重传请求HARQ进程对应；该第一终端设备启动或重启第一计时器，该第一计时器用于指示能够向该第二终端设备发送第一信息之前的最小时间间隔，该第一信息指示该第一终端设备调度该第一HARQ进程对应的重传数据。
也就是说，第一终端设备向第二终端设备发送第一数据后，启动或重启第一计时器；该第一终端设备在该第一计时器超时后，向该第二终端设备发送第一信息。
或者说，第一终端设备向第二终端设备发送第一数据后，启动或重启第一计时器；在 该第一计时器运行期间，该第一终端设备不向该第二终端设备发送第一信息。
作为示例非限定，该第一计时器的时长为协议规定或预配置的。可选地，该第一计时器的时长可以与第二终端设备的数据处理时间和/或第一终端设备准备重传数据的时间相关。
根据上述方案，第一终端设备向第二终端设备发送数据后由于第二终端设备需要时间处理数据和/或第一终端设备需要时间准备重传数据等，第一终端设备在一段时间内停止向该第二终端设备发送第一HARQ进程对应的重传数据的调度指示信息(即第一信息)，使得第二终端设备可以确定第一终端设备不发送第一信息而不在该时间段内检测第一信息，能够使进行侧行链路通信的终端设备对收发数据的理解一致，减小终端设备不必要的功率消耗，节省电能。
结合第一方面，在第一方面的某些实现方式中，该启动或重启第一计时器，包括：该第一HARQ进程的HARQ反馈被使能，该第一终端设备接收到来自该第二终端设备的HARQ反馈信息后，启动或重启该第一计时器，该HARQ反馈信息与该第一HARQ进程相对应。
根据上述方案，第一终端设备接收到来自第二终端设备的HARQ反馈信息后在一段时间内不发送第一信息，规定第一终端设备发送第一信息的时间段，能够使进行侧行链路通信的终端设备对收发数据的理解一致，减小终端设备不必要的功率消耗。
结合第一方面，在第一方面的某些实现方式中，该HARQ反馈信息指示未成功接收到该第一数据。
根据上述方案，第一终端设备根据HARQ反馈信息确定第二终端设备未成功接收第一数据后，在一段时间内进行重传准备，不向第二终端设备发送第一信息，使得第二终端设备可以确定第一终端设备不发送第一信息而不在该时间段内检测第一信息，能够使进行侧行链路通信的终端设备对收发数据的理解一致，减小终端设备不必要的功率消耗，节省电能。
结合第一方面，在第一方面的某些实现方式中，该第一HARQ进程的HARQ反馈被去使能。
根据上述方案，第一终端设备确定第一HARQ进程的HARQ反馈被去使能的情况下，在发送第一数据后一段时间内不向第二终端设备发送第一信息，使得第二终端设备可以确定第一终端设备不发送第一信息而不在该第一计时器运行期间检测(detecting)或监听(monitoring)第一信息，能够使进行侧行链路通信的终端设备对收发数据的理解一致，减小终端设备不必要的功率消耗，节省电能。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：该第一计时器超时后，该第一终端设备启动或重启第二计时器，其中，该第一终端设备在该第二计时器运行期期间发送与该第一HARQ进程对应的重传数据的时间间隔。
根据上述方案，在不发送第一信息的时间段结束后，该第一终端设备在一段时间内可以发送第一信息，使得第二终端设备可以确定第一终端设备在该时间段内发送重传数据而检测该重传数据，能够使进行侧行链路通信的终端设备对收发数据的理解一致，减小终端设备不必要的功率消耗，节省电能。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：该第二计时器超时后， 该第一终端设备释放该第一HARQ进程或重启该第一计时器。
根据上述方案，规定第一终端设备发送时间段，能够使进行侧行链路通信的终端设备对收发理解一致，减小终端设备不必要的功率消耗，节省电能。
第二方面，提供了一种无线通信方法，该方法可以由第二终端设备或配置于(或用于)第二终端设备的模块(如芯片或处理器)执行，以下以该方法由第二终端设备执行为例进行说明。
该方法包括：第二终端设备接收来自第一终端设备的第一数据，该第一数据与第一混合自动重传请求HARQ进程对应；该第二终端设备启动或重启第三计时器，该第三计时器用于指示能够接收到第一信息之前的最小时间间隔，该第一信息指示该第一终端设备调度该第一HARQ进程的重传数据。
也就是说，第二终端设备接收到来自第一终端设备的第一数据后，启动或重启第三计时器；该第二终端设备在该第三计时器超时后，检测来自该第二终端设备的第一信息。
或者说，第二终端设备接收到来自第一终端设备的第一数据后，启动或重启第三计时器；在该第三计时器运行期间，该第二终端设备不检测来自该第一终端设备的第一信息。结合第二方面，在第二方面的某些实现方式中，该启动或重启第三计时器，包括：该第一HARQ进程的HARQ反馈被使能，该第二终端设备向该第一终端设备发送HARQ反馈信息后，启动或重启该第三计时器，该HARQ反馈信息与该第一HARQ进程相对应。
结合第二方面，在第二方面的某些实现方式中，该HARQ反馈信息指示未成功接收到该第一数据。
结合第二方面，在第二方面的某些实现方式中，该第一HARQ进程的HARQ反馈被去使能。
结合第二方面，在第二方面的某些实现方式中，该方法还包括：该第三计时器超时后，该第二终端设备启动或重启第二计时器，其中，该第二计时器指示该第二终端设备能够接收该第一HARQ进程对应的重传数据的时间间隔。
结合第二方面，在第二方面的某些实现方式中，该方法还包括：该第二计时器超时后，该第二终端设备释放该第一HARQ进程或重启第三计时器。
第三方面，提供了一种无线通信方法，该方法可以由第一终端设备或配置于(或用于)第一终端设备的模块(如芯片或处理器)执行，以下以该方法由第一终端设备执行为例进行说明。
该方法包括：第一终端设备确定第一资源，该第一资源用于承载第二信息，该第二信息用于指示停止第四计时器，该第四计时器运行期间为该第一终端设备与该第二终端设备之间的DRX操作的激活时间；该第一终端设备向该第二终端设备发送该第二信息，该第二信息承载在该第一资源上。
根据上述方案，第一终端设备通过第二信息指示第二终端设备停止第四计时器，以使第一终端设备与第二终端设备之间的DRX操作进入非激活时间，能够使第一终端设备在不满足DRX操作条件的情况下及时指示停止第四计时器，减小终端设备不必要的功率消耗。
结合第三方面，在第三方面的某些实现方式中，第一终端设备确定停止第四计时器，包括：该第一终端设备在满足第一条件的情况下，确定停止该第四计时器，
其中，该第一条件包括以下一种或多种：
该第一终端设备电量小于或等于阈值、该第一终端设备的业务需求指示停止该第四计时器、该第一终端设备建立的单播连接数量大于或等于阈值、或者SL链路质量小于或等于阈值。
结合第三方面，在第三方面的某些实现方式中，该第一终端设备确定第一资源，包括：该第一终端设备向第一网络设备发送第三信息，该第三信息用于请求该第一资源；该第一终端设备根据来自该第一网络设备的第四信息，确定该第一资源，该第四信息用于指示该第一资源。
根据上述方案，第一终端设备向第一网络设备请求并获取发送第二信息的第一资源，以使第一终端设备能够通过第二信息指示第二终端设备停止第四计时器，使第一终端设备与第二终端设备之间的DRX操作进入非激活时间，能够使得第一终端设备及时指示停止第四计时器，减小终端设备不必要的功率消耗。
结合第三方面，在第三方面的某些实现方式中，在该第一终端设备向该第一网络设备发送第三信息之前，该方法还包括：该第一终端设备接收该第一网络设备发送的第五信息，该第五信息用于指示第二资源，该第二资源为用于承载该第三信息的专用资源。
根据上述方案，第一终端设备通过第一网络设备为其配置的专用资源发送请求第一资源的请求信息(即第三信息)，使得第一终端设备能够及时发送第三信息以获得第一资源，及时停止第四计时器，减小终端设备不必要的功率消耗。
结合第三方面，在第三方面的某些实现方式中，该第一资源为配置授权资源，或者，该第一资源为该第一终端设备竞争到的侧行链路资源。
结合第三方面，在第三方面的某些实现方式中，在该第一终端设备确定该第一资源之前，该方法还包括：该第一终端设备确定发送该第二信息，并启动第五计时器，该第五计时器用于指示该第一终端设备能够发送第二信息的时间间隔。
或者说，该第一终端设备确定发送该第二信息，并启动第五计时器；该第一终端设备在该第五计时器运行期间发送该第二信息。
根据上述方案，规定第一终端设备发送第二信息的时间间隔，第一终端设备在该时间间隔内发送第一信息，能够避免第一终端设备在第一信息作用的时间段结束后发送第一信息而造成不必要的功率消耗。
结合第三方面，在第三方面的某些实现方式中，该方法还包括:该第一终端设备发送该第二信息后，停止该第五计时器，或者，当该第五计时器运行超时，且该第一终端设备未确定用于发送该第二信息的资源时，该第一终端设备确定不向该第二终端设备发送该第二信息。
根据上述方案，第五计时器用于指示可以发送第二信息的时间间隔，在第一终端设备发送第二信息后，无需在运行第五计时器，第一终端设备及时停止第五计时器，能够减小终端设备不必要的功率消耗，节省电能。
结合第三方面，在第三方面的某些实现方式中，该第二信息为媒体接入控制控制元素MAC CE。
第四方面，提供了一种无线通信方法，该方法可以由第一网络设备或配置于(或用于)网络设备的模块(如芯片或处理器)执行，以下以该方法由第一网络设备执行为例进行说 明。
该方法包括第一网络设备接收来自第一终端设备的第三信息，该第三信息用于请求第一资源，该第一资源为用于该第一终端设备发送第一无线接入控制控制元素MAC CE的侧行链路资源；该第一网络设备向该第一终端设备发送第四信息，该第四信息用于指示该第一资源。
根据上述方案，第一网络设备在接收到来自第一终端设备请求第一资源的第三信息后，通过第四信息为第一终端设备配置用于发送第一MAC CE的第一资源，以便第一终端设备能够在该侧行链路资源上发送该第一MAC CE。结合第四方面，在第四方面的某些实现方式中，该第一MAC CE用于控制第一终端设备与第二终端设备之间的侧行链路的非连续接收DRX操作。
根据上述方案，第一网络设备为第一终端设备配置用于发送该第一MAC CE的第一资源，使得第一终端设备能够在该侧行链路资源上发送该第一MAC CE，以便第一终端设备能够通过该第一MAC CE控制侧行链路的DRX操作。
结合第四方面，在第四方面的某些实现方式中，在该第一网络设备接收来自第一终端设备的第三信息之前，该方法还包括：第一网络设备向第一终端设备发送第五信息，该第五信息指示用于指示第二资源，该第二资源为用于发送第三信息的专用资源。
根据上述方案，第一网络设备为第一终端设备配置发送请求第一资源的请求信息(即第三信息)的专用资源，使得第一终端设备能够及时发送第三信息以快速获得第一资源，及时停止第四计时器，减小终端设备不必要的功率消耗。
第五方面，提供了一种通信装置，该装置可以配置于第一终端设备(例如第一终端设备中的处理器或芯片)或该装置可以是第一终端设备。该通信装置包括：收发单元，用于第二终端设备发送第一数据，该第一数据与第一混合自动重传请求HARQ进程对应；处理单元，用于启动或重启第一计时器，该第一计时器用于指示能够向该第二终端设备发送第一信息之前的最小时间间隔，该第一信息调度该第一HARQ进程对应的重传数据。
也就是说，处理单元在收发单元发送所述第一数据后启动或重启第一计时器；该收发单元在该第一计时器运行期间不发送第一信息。
或者说，处理单元在收发单元发送所述第一数据后启动或重启第一计时器；该收发单元在该第一计时器超时后发送第一信息。
结合第五方面，在第五方面的某些实现方式中，该第一HARQ进程的HARQ反馈被使能，以及，该处理单元具体用于在该收发单元接收到来自该第二终端设备的HARQ反馈信息后启动或重启该第一计时器，该HARQ反馈信息与该第一HARQ进程相对应。
结合第五方面，在第五方面的某些实现方式中，该HARQ反馈信息指示未成功接收到该第一数据。
结合第五方面，在第五方面的某些实现方式中，该第一HARQ进程的HARQ反馈被去使能，以及，该处理单元具体用于在该收发单元发送该第一数据后启动或重启该第一计时器。
结合第五方面，在第五方面的某些实现方式中，该第一计时器超时后，该处理单元启动第二计时器，其中，该第二计时器指示该收发单元能够发送该第一HARQ进程对应的重传数据的时间间隔。
结合第五方面，在第五方面的某些实现方式中，该第二计时器超时后，该处理单元释放该第一HARQ进程或重启该第一计时器。
第六方面，提供了一种通信装置，该装置可以配置于第二终端设备(例如第一终端设备中的处理器或芯片)或该装置可以是第二终端设备。该通信装置包括：收发单元，用于接收来自第一终端设备的第一数据，该第一数据与第一混合自动重传请求HARQ进程对应；处理单元，用于启动或重启第三计时器，该第三计时器用于指示能够接收到第一信息之前的最小时间间隔，该第一信息指示该第一终端设备调度该第一HARQ进程的重传数据。
也就是说，处理单元在收发单元接收到所述第一数据后启动或重启第一计时器；处理单元在该第一计时器运行期间不监听第一信息。
或者说，处理单元在收发单元发送所述第一数据后启动或重启第一计时器；该收发单元在该第一计时器超时后监听第一信息。
结合第六方面，在第六方面的某些实现方式中，该第一HARQ进程的HARQ反馈被使能，该处理单元具体用于在该收发单元发送HARQ反馈信息后启动或重启该第三计时器，该HARQ反馈信息与该第一HARQ进程相对应。
结合第六方面，在第六方面的某些实现方式中，该HARQ反馈信息指示未成功接收到该第一数据。
结合第六方面，在第六方面的某些实现方式中，该第一HARQ进程的HARQ反馈被去使能，该处理单元具体用于接收该第一数据后启动或重启该第三计时器。
结合第六方面，在第六方面的某些实现方式中，该第三计时器超时后，该处理单元启动第二计时器，其中，该第二计时器指示该收发单元能够接收该第一HARQ进程对应的重传数据的时间间隔。
结合第六方面，在第六方面的某些实现方式中，该方法还包括：该第二计时器超时后，该处理单元释放该第一HARQ进程或重启第三计时器。
第七方面，提供了一种通信装置，该装置可以配置于第一终端设备(例如第一终端设备中的处理器或芯片)或该装置可以是第一终端设备。该通信装置包括：处理单元，用于确定第一资源，该第一资源用于承载第二信息，该第二信息用于指示停止第四计时器，该第四计时器运行期间为该第一终端设备与该第二终端设备之间的DRX操作的激活时间；收发单元，用于向该第二终端设备发送该第二信息，该第二信息承载在该第一资源上。
结合第七方面，在第七方面的某些实现方式中，该处理单元具体在满足第一条件的情况下，确定停止该第四计时器，其中，该第一条件包括以下一种或多种：
该第一终端设备电量小于或等于阈值、该第一终端设备的业务需求指示停止该第四计时器、该第一终端设备建立的单播连接数量大于或等于阈值、或者SL链路质量小于或等于阈值。
结合第七方面，在第七方面的某些实现方式中，该收发单元还用于向第一网络设备发送第三信息，该第三信息用于请求该第一资源；该处理单元具体根据第四信息确定第一资源，该第四信息来自第一网络设备，且该第四信息用于指示该第一资源。
结合第七方面，在第七方面的某些实现方式中，在该收发单元向该第一网络设备发送第三信息之前，该收发单元还用于接收该第一网络设备发送的第五信息，该第五信息用于 指示第二资源，该第二资源为用于承载该第三信息的专用资源。
结合第七方面，在第七方面的某些实现方式中，该第一资源为配置授权资源，或者，该第一资源为该第一终端设备竞争到的侧行链路资源。
结合第七方面，在第七方面的某些实现方式中，在该处理单元确定该第一资源之前，该处理单元还用于确定发送该第二信息，并启动第五计时器，该第五计时器用于指示该收发单元可以发送第一信息的时间间隔。
结合第七方面，在第七方面的某些实现方式中，该处理单元还用于在确定第一资源后停止该第五计时器，或者，当该第五计时器运行超时，且该处理单元未确定用于发送该第二信息的资源时，该处理单元确定该收发单元不向该第二终端设备发送该第二信息。
结合第七方面，在第七方面的某些实现方式中，该第二信息为媒体接入控制控制元素MAC CE。
第八方面，提供了一种通信装置，该装置可以配置于第一网络设备(例如第一网络设备中的处理器或芯片)或该装置可以是第一网络设备。该通信装置包括：收发单元，用于接收来自第一终端设备的第三信息，该第三信息用于请求第一资源，该第一资源为用于发送第一无线接入控制控制元素MAC CE的侧行链路资源；处理单元，用于确定该第一资源；该收发单元还用于向该第一终端设备发送第四信息，该第四信息用于指示该第一资源。
结合第八方面，在第八方面的某些实现方式中，在该收发单元接收来自第一终端设备的第三信息之前，该收发单元还用于向第一终端设备发送第五信息，该第五信息指示用于指示第二资源，该第二资源为用于发送第三信息的专用资源。
结合第八方面，在第八方面的某些实现方式中，该第一MAC CE用于控制第一终端设备与第二终端设备之间的侧行链路的非连续接收DRX操作。
第九方面，提供了一种通信装置，包括处理器。该处理器与存储器耦合，可用于执行存储器中的指令，以实现上述第一方面或第三方面以及第一方面或第三方面中任一种可能实现方式中的方法。可选地，该通信装置还包括存储器。可选地，该通信装置还包括通信接口，处理器与通信接口耦合。
在一种实现方式中，该通信装置为第一终端设备。当该通信装置为第一终端设备时，该通信接口可以是收发器，或，输入/输出接口。
在另一种实现方式中，该通信装置为配置于第一终端设备中的芯片。当该通信装置为配置于终端设备中的芯片时，该通信接口可以是输入/输出接口。
可选地，该收发器可以为收发电路。可选地，该输入/输出接口可以为输入/输出电路。
第十方面，提供了一种通信装置，包括处理器。该处理器与存储器耦合，可用于执行存储器中的指令，以实现上述第二方面以及第二方面中任一种可能实现方式中的方法。可选地，该通信装置还包括存储器。可选地，该通信装置还包括通信接口，处理器与通信接口耦合。
在一种实现方式中，该通信装置为第二终端设备。当该通信装置为第二终端设备时，该通信接口可以是收发器，或，输入/输出接口。
在另一种实现方式中，该通信装置为配置于第二终端设备中的芯片。当该通信装置为配置于第二终端设备中的芯片时，该通信接口可以是输入/输出接口。
可选地，该收发器可以为收发电路。可选地，该输入/输出接口可以为输入/输出电路。
第十一方面，提供了一种通信装置，包括处理器。该处理器与存储器耦合，可用于执行存储器中的指令，以实现上述第四方面以及第四方面中任一种可能实现方式中的方法。可选地，该通信装置还包括存储器。可选地，该通信装置还包括通信接口，处理器与通信接口耦合。
在一种实现方式中，该通信装置为第一网络设备。当该通信装置为第一网络设备时，该通信接口可以是收发器，或，输入/输出接口。
在另一种实现方式中，该通信装置为配置于第一网络设备中的芯片。当该通信装置为配置于网络设备中的芯片时，该通信接口可以是输入/输出接口。
可选地，该收发器可以为收发电路。可选地，该输入/输出接口可以为输入/输出电路。
第十二方面，提供了一种处理器，包括：输入电路、输出电路和处理电路。该处理电路用于通过该输入电路接收信号，并通过该输出电路发射信号，使得该处理器执行第一方面至第四方面以及第一方面至第四方面中任一种可能实现方式中的方法。
在具体实现过程中，上述处理器可以为一个或多个芯片，输入电路可以为输入管脚，输出电路可以为输出管脚，处理电路可以为晶体管、门电路、触发器和各种逻辑电路等。输入电路所接收的输入的信号可以是由例如但不限于接收器接收并输入的，输出电路所输出的信号可以是例如但不限于输出给发射器并由发射器发射的，且输入电路和输出电路可以是同一电路，该电路在不同的时刻分别用作输入电路和输出电路。本申请实施例对处理器及各种电路的具体实现方式不做限定。
第十三方面，提供了一种处理装置，包括处理器和存储器。该处理器用于读取存储器中存储的指令，并可通过接收器接收信号，通过发射器发射信号，以执行第一方面至第四方面以及第一方面至第四方面中任一种可能实现方式中的方法。
可选地，该处理器为一个或多个，该存储器为一个或多个。
可选地，该存储器可以与该处理器集成在一起，或者该存储器与处理器分离设置。
在具体实现过程中，存储器可以为非瞬时性(non-transitory)存储器，例如只读存储器(read only memory，ROM)，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请实施例对存储器的类型以及存储器与处理器的设置方式不做限定。
应理解，相关的数据交互过程例如发送指示信息可以为从处理器输出指示信息的过程，接收能力信息可以为处理器接收输入能力信息的过程。具体地，处理器输出的数据可以输出给发射器，处理器接收的输入数据可以来自接收器。其中，发射器和接收器可以统称为收发器。
上述第十三方面中的处理装置可以是一个或多个芯片。该处理装置中的处理器可以通过硬件来实现也可以通过软件来实现。当通过硬件实现时，该处理器可以是逻辑电路、集成电路等；当通过软件来实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现，该存储器可以集成在处理器中，可以位于该处理器之外，独立存在。
第十四方面，提供了一种计算机程序产品，该计算机程序产品包括：计算机程序(也可以称为代码，或指令)，当该计算机程序被运行时，使得计算机执行上述第一方面至第四方面以及第一方面至第四方面中任一种可能实现方式中的方法。
第十五方面，提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机 程序(也可以称为代码，或指令)当其在计算机上运行时，使得计算机执行上述第一方面至第四方面以及第一方面至第四方面中任一种可能实现方式中的方法。
第十六方面，提供了一种通信系统，包括前述的第一终端设备和第二终端设备。
附图说明
图1是适用于本申请实施例的通信系统100的一示意图。
图2是本申请实施例提供的侧行链路的通信方法的一示意性流程图。
图3是本申请实施例提供的侧行链路的通信方法的另一示意性流程图。
图4是本申请实施例提供的侧行链路的通信方法的一示例图。
图5是本申请实施例提供的侧行链路的通信方法的另一例示意性流程图。
图6是本申请实施例提供的侧行链路的通信方法的另一例示意性流程图。
图7是本申请的通信装置的一例的示意性框图。
图8是本申请的终端设备的一例的示意性结构图。
图9是本申请的网络设备的一例的示意性结构图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、第五代(5th generation，5G)系统或新无线(new radio，NR)系统，车到其它设备(vehicle-to-X V2X)，其中V2X可以包括车到互联网(vehicle to network，V2N)、车到车(vehicle to-Vehicle，V2V)、车到基础设施(vehicle to infrastructure，V2I)、车到行人(vehicle to pedestrian，V2P)等、车间通信长期演进技术(Long Term Evolution-Vehicle，LTE-V)、车联网、机器类通信(machine type communication，MTC)、物联网(Internet of Things，IoT)、机器间通信长期演进技术(long term evolution-machine，LTE-M)，机器到机器(machine to machine，M2M)，非地面通信(non-terrestrial network，NTN)系统或者未来演进的其它通信系统等。
图1是适用于本申请实施例的通信系统100的一示意图。
本适用于申请实施例的通信系统可以包括至少两个终端设备，如图1所示的通信系统100中的终端设备102、103、104、105。本适用于申请实施例的通信系统还可以包括至少一个网络设备，如图1所示的无线通信系统100中的网络设备101。该至少两个终端设备之间可以建立侧行链路(sidelink，SL)，如图1中的链路120、121、122、123、124，建立了侧行链路的终端设备之间可以直接进行通信。其中，一个终端设备可以与一个或多个终端设备建立侧行链路。该通信系统中的终端设备中也可以与网络设备建立无线连接进行数据通信，如图1所示的终端设备102、103分别于网络设备建立了无线链路110、111。该通信系统中的终端设备也可以不与网路设备建立无线链路，如图1所示的终端设备104、105，本申请对此不作限定。
本申请实施例中的终端设备也可以称为用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。本申请的实施例中的终端设备可以是手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)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、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、车载通信装置，车载通信处理芯片，可穿戴设备，5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等。
其中，可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
此外，终端设备还可以是物联网(internet of things，IoT)系统中的终端设备。IoT是未来信息技术发展的重要组成部分，其主要技术特点是将物品通过通信技术与网络连接，从而实现人机互连，物物互连的智能化网络。
应理解，本申请对于终端设备的具体形式不作限定。
本申请实施例中的技术方案还可以应用于网络设备。该网络设备包括但不限于：演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、路边单元(road side unit，RSU)、节点B(node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved nodeB，或home node B，HNB)、基带单元(baseband unit，BBU)，无线保真(wireless fidelity，WIFI)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission point，TP)或者发送接收点(transmission and reception point，TRP)等，还可以为5G(如NR)系统中的gNB或传输点(TRP或TP)，或者，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)，或，分布式单元(distributed unit，DU)等，该网络设备还可以是车联网中为终端设备提供通信服务或者通信控制的网络侧装置。
网络设备为小区中的终端设备提供通信服务，小区中的终端设备通过网络设备分配的传输资源(例如，频域资源、时域资源等)与网络设备进行通信，该小区可以属于宏基站(例如，宏eNB或宏gNB等)。
为便于理解本申请的实施例，首先对本申请中涉及到的术语做简单说明。
1、侧行链路中的广播、组播通信方式
侧行链路的广播、组播是指一个终端设备发送的广播或组播数据，能够被一个或多个终端设备接收到。例如，预先定义业务数据在PC5接口上传输时所使用的目的层2标识(Destination Layer-2ID)。当发送设备有该广播业务数据发送时，可以直接通过用户面协议栈进行发送，在媒体接入控制(media access control protocol，MAC)层和/或物理层(physical，PHY)层填充该广播业务对应的Destination Layer-2ID。对该广播业务感兴趣的终端设备可以在PHY层监听是否有该广播业务对应的Destination Layer-2ID的业务数据，并进行接收、解析，但本申请不限于此。
2、侧行链路中的单播通信方式
单播是终端设备一对一的通信方式，发送设备通过目的地址指示其发送的单播数据的接收设备，接收设备根据单播数据的目的地址确定该单播数据是否是发送给自己的单播数据，以及根据单播数据的源地址确定该单播数据是由哪个设备发送的。可选地，两个终端设备可以通过信令交互建立该两个设备之间的单播连接，单播连接建立完成后可以进行单播通信。
3、侧行链路传输模式1(mode1)
侧行链路mode1是指终端设备根据网络设备发送的侧行链路调度授权(sidelink grant)确定用于发送侧行链路数据的资源。该侧行链路调度授权用于授权该终端设备专用的发送侧行链路数据的资源。例如，终端设备在发送侧行链路前，向网络设备上报缓存状态报告buffer status reports，BSR)以通知网络设备待发送的数据量，网络设备根据终端设备上报的数据量为其授权相应资源。
4、侧行链路传输模式2(mode2)
侧行链路mode2是指网络设备预先分配用于竞争的侧行链路资源，多个终端设备可以在该用于竞争的侧行链路资源中竞争资源，在竞争到资源的情况下，终端设备可以在该竞争到的资源上发送侧行链路的数据。例如，终端设备根据测量该用于侧行链路的资源中的每个时频资源是否被占用、来选择未被占用的资源进行传输，但本申请不限于此。
下面结合附图详细说明本申请实施例提供的侧行链路的通信方法。
本申请提出通过侧行链路通信的多个终端设备之间可以通过发送设备和接收设备之间约定发送、接收的行为以及维护计时器的方式减小功率消耗。
图2是本申请实施例提供的侧行链路的通信方法的一示意性流程图。
S210，第一终端设备向第二终端设备发送第一数据。
相应地，该第二终端设备接收来自该第一终端设备的该第一数据。
可选地，该第一终端设备还向第二终端设备发送控制信息，例如，该控制信息可以是第一侧行链路控制信息(sidelink control information，SCI)，下文中以该控制信息为第一SCI为例进行说明，但本申请不限于此。该第一SCI用于指示该第一终端设备调度该第一数据。该第一数据与第一HARQ进程相对应，可选地，该第一SCI中包括该第一HARQ进程的标识。
可选地，第一数据可以是第一终端设备和第二终端设备之间的侧行链路通信数据，例如，该第一数据包括MAC协议数据单元(protocol data unit，PDU)或传输块(transport block，TB)该第一数据可以承载在物理侧行链路共享信道(physical sidelink shared channel， PSSCH)上，但本申请不限于此。
S220，第一终端设备启动或重启计时器A(即，第一计时器的一例)，第二终端设备启动或重启计时器A(即，第三计时器的一例)。
在图2所示的实施例中，第一终端设备维护的第一计时器与第二终端设备维护的第三计时器的计时时长相同，即同为计时器A。
第一终端设备发送第一信号后，该第一终端设备启动或重启计时器A，第二终端设备接收该第一信号后，该第二终端设备启动或重启计时器A。其中，该第一信号为该第一SCI或第一数据。也就是说，该计时器A与第一HARQ进程相对应，当第一终端设备发送该第一HARQ进程对应的第一SCI或第一数据后，启动或重启该计时器A。相应地，第二终端设备接收到该第一HARQ进程对应的第一SCI或第一数据后，启动或重启该计时器A。
例如，第一终端设备发送第一数据后启动或重启计时器A，相应地，第二终端设备接收第一数据后启动或重启计时器A。
再例如，第一终端设备发送第一SCI后启动或重启计时器A，相应地，第二终端设备接收第一SCI后启动或重启计时器A。
一种实施方式中，计时器A用于指示第一终端设备不发送信号的时间间隔，或者说，对于第二终端设备，计时器A用于指示第二终端设备不监听来自第一终端设备的信号的时间间隔。信号可以包括指示信息和/或数据。也就是说，在计时器A运行期间第一终端设备不发送指示信息和/或数据。第一终端设备在发送第一SCI或第一数据后的一段时间内不发送信号，能够减小第一终端设备的功率消耗，相应地，第二终端设备在第一终端设备不发送信号的时间段内不监听来自第一终端设备的信号，能够减小第二终端设备不必要的功率消耗。
另一种实施方式中，该计时器A用于指示该第一终端设备(即发送数据的发送设备)能够发送第一信息之前的时间间隔，或者说，计时器A用于指示该第二终端设备(即接收数据的接收设备)能够接收第一信息之前的时间。也就是说，第一终端设备在其维护的计时器A运行期间不发送第一信息，相应地，该第二终端设备在其维护的计时器A运行期间不监听该第一信息。或者说，该第一终端设备在其维护的计时器A超时后发送第一信息，相应地，该第二终端设备在其维护的计时器A超时后监听该第一信息。其中，第一信息用于指示该第一终端设备调度了第一数据的重传数据，或者说该第一信息用于指示该第一终端设备调度了该第一HARQ进程对应的重传数据。可选地，该第一信息为SCI。根据上述方案，进行侧行链路通信的终端设备在发送或接收第一HARQ进程对应的第一信息或数据后，考虑终端设备的数据处理时间，在计时器A运行期间不接收或不发送第一HARQ进程对应的第一信息，能够避免终端设备不必要的功率消耗，节省电能。
可选地，计时器A的时长可以为协议规定的或预配置的。
例如，该计时器A的时长为与第一终端设备和/或第二终端设备建立连接的网络设备为该第一终端设备和/或第二终端设备预配置的，但本申请不限于此。
再例如，该计时器A为该第一终端设备确定的，并由该第一终端设备为该第二终端设备配置的。可选地，该第一终端设备可以根据其发送重传数据之前所需要的准备时间确定计时器A的时长，并通知该第二终端设备。或者，该第一终端设备可以根据网络设备的指 示确定该计时器A的时长，但本申请不限于此。
再例如，该计时器A为该第二终端设备确定的，并由该第二终端设备为该第一终端设备配置的。可选地，该第二终端设备可以根据其接收到一个HARQ进程对应的数据后处理数据所需要的准备时间确定计时器A的时长，并通知该第一终端设备。或者，该第二终端设备可以根据网络设备的指示确定该计时器A的时长，但本申请不限于此。
可选地，计时器A启动或重启的时刻可以是但不限于以下时刻中的一种：
承载该第一信号的最后一个符号的结束时刻；
该第一信号后的第一个符号起始时刻；
承载该第一信号的最后一个符号后的一个预设时间间隔结束时刻。
例如，该第一终端设备和该第二终端设备均在承载第一数据的最后一个符号结束时刻启动或重启该计时器A。再例如，该第一终端设备和该第二终端设备均在承载该第一SCI的最后一个符号后的预设时间间隔后启动或重启该计时器A，但本申请不限于此。根据上述方案，能够第一终端设备和第二终端设备对启动或重启计时器的时刻达成一致。
在本申请中，计时器的启动可以理解为第一次启动该计时器。计时器的重启可以理解为当计时器已运行一段时间处于被停止状态(也就是说计时器处于0到最大值之间的数值)时，重新启动该计时器从初始值开始计时。或者计时器的重启可以理解为当计时器已运行一段时间处于被停止状态时，重新启动该计时器从当前值开始继续计时。
需要说明的是，本申请以计时器为例进行说明，具体实施中，可以是定时器、计数器等可以用于计量时间长度的器件或模块。或者，本申请中的计时器可以替换为时间间隔，其中，启动或重启计时器的时刻，可以理解为该时间间隔的起始点；计时器运行期间，可以理解为在该时间间隔内；停止计时器，可以理解为在该时间间隔内与该时间间隔相应的功能、动作或操作的停止；计时器超时，可以理解为该时间间隔结束之后，但本申请不限于此。
可选地，该第一HARQ进程可以为HARQ反馈使能(enable)或HARQ反馈去使能(disable)。
例如，侧行链路的无线承载(radio bearer，RB)可以被配置为HARQ反馈使能，与该无线承载的数据相对应的HARQ进程则相应的为HARQ反馈使能。或者，侧行链路的无线承载(radio bearer，RB)可以被配置为HARQ反馈去使能，与该无线承载的数据相对应的HARQ进程则相应的为HARQ反馈去使能，但本申请不限于此。
可选地，该第一SCI中包括HARQ反馈指示域，该HARQ反馈指示域用于指示该第一HARQ进程的HARQ反馈是否被使能。
一种实施方式中，当该第一HARQ进程的HARQ反馈被去使能时，第一终端设备向第二终端设备发送的第一SCI，该第一SCI指示该第一终端设备调度该第一HARQ进程对应的该第一数据，且该第一SCI中的HARQ反馈指示域指示该第一HARQ进程被去使能，该第一终端设备发送第一信号后启动或重启计时器A。第二终端设备根据第一SCI中的HARQ反馈指示域确定该第一HARQ进程的HARQ反馈被去使能，则第二终端设备接收该第一信号后启动或重启该计时器A，具体实施方式可以参考上述实施例中的描述。
根据上述方案，当该第一HARQ进程被去使能时，规定第一终端设备在发送第一信号后启动或重启计时器A，第二终端设备在接收第一信号后启动或重启计时器A，能够使 得第一终端数和第二终端设备对启动计时器的时刻达成一致，减小终端设备不必要的功率消耗，节省电能。
另一种实施方式中，该第一HARQ进程的HARQ反馈被使能。具体实施可以包括但不限于以下两种方式：
方式一，第一终端设备接收到来自第二终端设备的HARQ反馈信息后启动或重启该计时器A。相应地，第二终端设备在发送HARQ反馈信息后启动或重启该计时器A，其中，该HARQ反馈信息指示成功接收该第一数据(例如，该HARQ反馈信息指示ACK)或未成功接收该第一数据(例如，该HARQ反馈信息指示NACK)。
也就是说，在方式一中，无论第二终端设备是否成功接收该第一数据，第一终端设备接收到来自第二终端设备的HARQ反馈信息后启动或重启该计时器A。相应的，第二终端设备在发送该HARQ反馈信息后启动或重启该计时器A。
方式二，该第二终端设备确定未成功接收第一数据，向第一终端设备发送指示未成功接收该HARQ反馈信息，并启动计时器A，相应地，第一终端设备接收到指示第二终端设备未成功接收第一数据的HARQ反馈信息后启动或重启计时器A。
也就是说，在方式二中，当HARQ反馈信息指示未成功接收第一数据时，该第一终端设备和该第二终端设备启动或重启计时器A。当HARQ反馈信息指示成功接收第一数据时，该第一终端设备和该第二终端设备不启动或不重启该计时器A。或者当第二终端设备成功接收该第一数据时，该第二终端设备不发送HARQ反馈信息，但本申请不限于此。可选地，第一终端设备和第二终端设备启动或重启该计时器A可以是承载该HARQ反馈信息的最后一个符号的结束时刻或该HARQ反馈信息后的第一个符号的起始时刻。
例如，该第二终端设备接收来自该第一终端设备的第一SCI，根据第一SCI接收该第一数据，但未成功解码该第一数据。该第一SCI中的HARQ反馈指示域指示该第一HARQ进程的HARQ反馈被使能，则该第二终端设备向该第一终端设备发送HARQ反馈信息，该HARQ反馈信息指示该第二终端设备未成功接收第一数据。第二终端设备在承载该HARQ反馈信息的最后一个符号的结束时刻启动或重启该计时器A。该第一终端设备接收到该HARQ反馈信息后，在该HARQ反馈信息的最后一个符号的结束时刻启动或重启该计时器A。
根据上述方案，当该第一HARQ进程被使能时，规定第一终端设备在接收到HARQ反馈信息后启动计时器A，第二终端设备在发送HARQ反馈信息后启动或重启计时器A，能够使得第一终端数和第二终端设备对启动计时器的时刻达成一致，减小终端设备不必要的功率消耗，节省电能。
可选地，启动或重启计时器A的条件还包括第一HARQ进程未被释放。也就是说，第一终端设备在接收到HARQ反馈信息后，且确定该第一HARQ进程未被释放的情况下，该第一终端设备启动或重启该计时器A。相应地，第二终端设备在发送HARQ反馈信息后，且确定该第一HARQ进程未被释放的情况下，该第二终端设备启动或重启该计时器A。能够避免第一HARQ进程被释放后终端设备仍然启动或重启计时器而造成不必要的功率消耗。
作为示例非限定，该第一HARQ进程未被释放可以包括但不限于：所述第一数据的重传次数未达到最大重传次数，和/或，存在所述第一数据的重传资源。
S230，计时器A运行期间，第一终端设备不发送该第一信息，第二终端设备不监听该第一信息。
第一终端设备在其维护的计时器A运行期间不发送该第一信息，也就是说，在计时器A超时后，第一终端设备才能够发送该第一信息。相应地，第二终端设备在其维护的计时器A运行期间不监听该第一信息，在计时器A超时后开始监听该第一信息。
根据上述方案，进行侧行链路通信的多个终端设备在发送或接收第一HARQ进程对应的第一信息或数据后，考虑终端设备的数据处理时间，在计时器A运行期间不监听或不发送第一HARQ进程对应的第一信息，能够避免终端设备不必要的功率消耗，节省电能。
图3是本申请实施例提供的侧行链路的通信方法的另一示意性流程图。
需要说明的是，图3实施例中与图2实施例中相同或相似的部分可以参考图2实施例中的描述，为了简要，在此不在赘述。
S310，第一终端设备向第二终端设备发送第一数据。
相应地，该第二终端设备接收来自该第一终端设备的该第一数据。
可选地，该第一终端设备还向第二终端设备发送第一SCI，该第一SCI用于指示该第一终端设备调度该第一数据。该第一数据与第一HARQ进程相对应。该第一HARQ进程的HARQ反馈被使能。
S320，第一终端设备启动或重启计时器B(即，第一计时器的另一例)。
第一终端设备在发送该第一SCI或该第一数据后启动或重启该计时器B。也就是说，该计时器B与第一HARQ进程相对应，当第一终端设备发送该第一HARQ进程对应的第一SCI或第一数据后，启动或重启该第一HARQ进程对应的该计时器B。在计时器B运行期间，第一终端设备不发送第一信息。或者说，在计时器B超时后该第一终端设备才能够发送第一信息。该计时器B用于指示第一终端设备能够向第二终端设备发送第一信息之前的时间间隔。或者说，该第一终端设备在该计时器B运行期间不向该第二终端设备发送第一信息，也就是说，该第一终端设备在计时器B超时后向该第二终端设备发送第一信息。其中，第一信息用于指示该第一终端设备调度了第一数据的重传数据，或者说该第一信息用于指示该第一终端设备调度了该第一HARQ进程对应的重传数据。可选地，该第一信息为SCI。作为示例非限定，该第一终端设备启动或重启该计时器B的时刻可以包括但不限于以下一种：
承载该第一SCI或该第一数据的最后一个符号的结束时刻；
该第一SCI或该第一数据后的第一个符号的起始时刻；
承载该第一SCI或该第一数据的最后一个符号之后的一个时间间隔内。
S330，第二终端设备向第一终端设备发送HARQ反馈信息。
该第二终端设备接收到该第一SCI后，可以根据该第一SCI中的HARQ反馈指示域确定该第一HARQ进程的HARQ反馈被使能。该第二终端设备根据该第一SCI的指示接收该第一数据，确定该第一数据是否正确解码，向第一终端设备发送HARQ反馈信息。
S340，第二终端设备启动或重启计时器C(即，第三计时器的另一例)。
第二终端设备发送该HARQ反馈信息后，启动或重启该计时器C。计时器C运行期间该第二终端设备不监听来自第一终端设备的该第一信息，即调度该第一HARQ进程对应的重传数据的控制信息，或者说，该第二终端设备在计时器C超时后开始监听该第一信 息。也就是说，该计时器C与第一HARQ进程相对应，当第二终端设备接收到该第一HARQ进程对应的第一SCI或第一数据后，启动或重启该第一HARQ进程对应的该计时器C。
在图3所示的实施例中，第一终端设备维护的第一计时器(即计时器B)与第二终端设备维护的第三计时器(即计时器C)的计时时长不相同。
一种实施方式中，该第二终端设备发送该HARQ反馈信息后，启动或重启该计时器C。其中，该HARQ反馈信息指示该第二终端设备成功接收该第一数据或未成功接收该第一数据。
也就是说，无论该第二终端设备是否成功接收该第一数据，该第二终端设备发送HARQ反馈信息后均启动或重启该计时器C。
另一实施方式中，该第二终端设备确定第一数据未成功接收，向第一终端设备发送HARQ反馈信息，该HARQ反馈信息指示第二终端设备未成功接收第一数据，第二终端设备启动或重启该计时器C。
也就是说，仅当该第二终端设备未成功接收该第一数据时，该第二终端设备在发送HARQ反馈信息后启动或重启计时器C。该第二终端设备成功接收该第一数据时不启动或重启该计时器C。
该计时器C用于指示第二终端设备能够监听到来自第一终端设备的第一信息之前的最小时间间隔。或者说，该第二终端设备在该计时器C运行期间不监听该第一终端设备发送的第一信息，也就是说，该第二终端设备在计时器C超时后监听该第一信息。其中，第一信息用于指示该第一终端设备调度了第一数据的重传数据，或者说该第一信息用于指示该第一终端设备调度了该第一HARQ进程对应的重传数据。可选地，该第一信息为SCI。
需要说明的是，上述计时器C用于指示第二终端设备能够监听到来自第一终端设备的第一信息之前的最小时间间隔。可以理解为，计时器C所指示的数值表示第二终端设备能够监听到该第一信息的时刻与当前时刻的最小时间间隔，也就是说，第一终端设备在计时器C超时前不会发送第一信息，在计时器C超时后可以发送第一信息，但不一定是计时器C超时后立即发送第一信息，可以是计时器C超时后的一段时间后发送第一信息，或者不发送第一信息，因此，计时器C指示的数值为第二终端设备能够监听到第一信息之前的最小时间间隔。计时器A、B与计时器C的工作原理相同或相似，为了简要，再次不在赘述。另外，在本申请中计时器的时长是指计时器能够指示到的最大数值，一个计时器运行期间所指示的数值小于该计时器的时长。
作为示例非限定，该第二终端设备启动或重启该计时器C的时刻可以包括但不限于以下一种：
承载该HARQ反馈信息的最后一个符号的结束时刻；
该HARQ反馈信息后的第一个符号的起始时刻；
承载该HARQ反馈信息的最后一个符号之后的一个时间间隔内。
例如图4所示，在图3实施例中，该计时器B在第一SCI或第一数据后启动，该计时器C在HARQ反馈信息后启动，该计时器B与该计时器C的启动或重启时刻不同，但停止时刻一致，即计时器B、计时器C的超时时刻相同，以便第一终端设备和第二终端设备对信号的接收和发送达成一致。
一种实施方式中，与第一终端设备建立连接的第一网络设备和与第二终端设备建立连 接的第二网络设备之间协商计时器B和计时器C的时长，以使超时时刻达成一致。并由第一网络设备为第一终端设备配置该计时器B的时长，由该第二网络设备为第二终端设备配置该计时器C的时长。可选地，该第一网络设备和该第二网络设备可以是同一网络设备，即该第一终端设备与该第二终端设备连接于同一网络设备，但本申请不限于此。
另一种实施方式中，由第一终端设备确定计时器B和计时器C的时长并通知第二终端设备，或者，由第二终端设备确定计时器B和计时器C的时长并通知第一终端设备。
另一种实施方式中，由第一终端设备确定计时器C的时长并通知第二终端设备，第一终端设备根据计时器C的时长以及HARQ反馈信息与第一SCI或第一数据之间的时间差，确定计时器B的时长。或者，由第一终端设备确定计时器B的时长并通知第二终端设备，该第二终端设备根据计时器B的时长以及HARQ反馈信息与第一SCI或第一数据之间的时间差，确定计时器C的时长。或者反之，由第二终端设备确定计时器B或计时器C的时长并通知第一终端设备，第一终端设备根据HARQ反馈信息与第一SCI或第一数据之间的时间差，确定另一个计时器的时长。
可选地，计时器A、B、C时长的确定可以考虑第二终端设备处理数据所需要的时间长度和/或第一终端设备准备重传数据所需要的时间长度，但本申请不限于此。可选地，启动或重启计时器C的条件除发送HARQ反馈信息以外还可以包括第一HARQ进程未被释放。也就是说，第二终端设备在发送HARQ反馈信息后，且确定该第一HARQ进程未被释放的情况下，该第二终端设备启动或重启该计时器C。
根据上述方案，进行侧行链路通信的多个终端设备在发送或接收第一HARQ进程对应的第一信息或数据后，考虑终端设备的数据处理时间，启动或重启各自维护的计时器，在计时器运行期间不接收或不发送第一HARQ进程对应的第一信息，能够避免终端设备不必要的功率消耗，节省电能。
可选地，第一计时器和第三计时器超时后，第一终端设备和第二终端设备启动或重启各自维护的第二计时器，该第二计时器用于指示能够传输该第一HARQ进程对应的重传数据的时间间隔。或者说，该第二计时器用于指示该第一终端设备能够发送该第一HARQ进程对应的重传数据的时间间隔，或者说，该第二计时器用于指示该第二终端设备能够接收该第一HARQ进程对应的重传数据的时间间隔。
根据上述方案，在不发送第一信息的时间段结束后，该第一终端设备在一段时间内可以发送第一信息，使得第二终端设备可以确定第一终端设备在该时间段内发送重传数据而检测该重传数据，能够使进行侧行链路通信的终端设备对收发数据的理解一致，减小终端设备不必要的功率消耗，节省电能。
一种实施方式中，当第一HARQ进程的HARQ反馈被使能时，第二终端设备可以根据该第一SCI确定第一HARQ进程的HARQ反馈被使能，并在第三计时器超时，且发送了指示未成功接收该第一数据的HARQ反馈信息(例如，NACK)后，启动或重启第二终端设备维护的第二计时器；相应地，第一终端设备在第一计时器超时，且接收到指示未成功接收该第一数据的HARQ反馈信息后，启动或重启第一终端设备维护的该第二计时器。可选地，在HARQ反馈信息指示成功接收该第一数据的情况下，第一终端设备和第二终端设备不启动或不重启该第二计时器。
根据上述方案，在第二终端设备未成功接收第一数据的情况下，启动或重启第二计时 器以接收第一HARQ进程对应的重传数据，在第二终端设备成功接收到该第一数据后不启动或不重启第二计时器，能够使进行侧行链路通信的终端设备对收发数据的理解一致，减小终端设备不必要的功率消耗，节省电能。
可选地，第一终端设备可以向一个第二终端设备发送该第一数据，或者第一终端设备还可以向多个第二终端设备发送该第一数据，例如该第一终端设备组播该第一数据后，第一计时器超时后，在第一终端设备接收到的来自多个第二终端设备的NACK反馈的个数大于或等于第一阈值的情况下，或者，在第一终端设备接收到的来自多个第二终端设备的NACK反馈的能量的大于或等于第二阈值的情况下，该第一终端设备启动或重启第二计时器。例如，第一终端设备的物理层向媒体接入控制层(media access control，MAC)发送指示NACK反馈的数量(或反馈NACK的第二终端设备的数量)或者接收到的NACK反馈的能量的指示信息，该第一终端设备的MAC层根据接收到的该指示信息，确定是否启动或重启第二计时器。例如，MAC层根据指示信息确定接收到的NACK反馈的数量大于或等于第一阈值，确定启动或重启该第二计时器。或者，MAC层根据指示信息确定接收到的NACK反馈的能量大于或等于第二阈值，确定启动或重启该第二计时器。作为示例限定，该第一阈值或者该第二阈值可以是协议规定的、网络配置的或者预配置的。
另一种实施方式中，当第一HARQ进程的HARQ反馈被去使能时，第一终端设备在第一计时器超时后，启动或重启第二计时器。第二终端设备可以根据该第一SCI确定第一HARQ进程的HARQ反馈被去使能，并在第三计时器超时后，启动或重启第二计时器。
根据上述方案，当第一HARQ进程的HARQ反馈被去使能时，第一计时器超时后启动第二计时器，使得第一终端设备可以在第二计时器运行期间向第二终端设备发送该第一HARQ进程对应的重传数据，相应的第二终端设备可以在第二计时器运行期间接收第一终端设备发送的该第一HARQ进程对应的重传数据。能够使进行侧行链路通信的终端设备对收发数据的理解一致，减小终端设备不必要的功率消耗，节省电能。
可选地，第一终端设备在第一计时器超时后，判断该第一HARQ进程对应的数据(例如，MAC协议数据单元(protocol data unit，PDU)或传输块(transport block，TB))的传输次数或重传次数小于或等于预设的最大值的情况下，该第一终端设备启动或重启第二计时器。当该第一HARQ进程对应的数据的传输次数或重传次数大于或等于预设的最大值时，第二终端设备不启动或不重启第二计时器。
可选地，第二终端设备在第三计时器超时后，判断该第一HARQ进程对应的数据(例如，MAC PDU或TB)的传输次数或重传次数小于或等于预设的最大值的情况下，该第二终端设备启动或重启第二计时器。当该第一HARQ进程对应的数据的传输次数或重传次数大于或等于预设的最大值时，第二终端设备不启动或不重启第二计时器。
根据上述方案，在第一HARQ进程的数据传输达到一定条件的情况下，不启动或不重启该第一HARQ进程对应的第二计时器，即不再传输该HARQ进程对应的重传数据，能够使进行侧行链路通信的终端设备对收发数据的理解一致，减小终端设备不必要的功率消耗，节省电能。
需要说明的是，本申请的方案在具体实施中，数值与阈值或门限值比较时，“等于”的情况可以与“大于”的情况下执行的操作相同，也可以与“小于”的情况下执行的操作相同，本申请对此不作限定。
可选地，第一终端设备和第二终端设备启动或重启第二计时器的条件还包括该第一HARQ进程未被释放。也就是说，第一终端设备在第一计时器超时，且确定该第一HARQ进程未被释放的情况下，该第一终端设备启动或重启第二计时器。相应地，第二终端设备在第三计时器超时，且确定该第一HARQ进程未被释放的情况下，该第一终端设备启动或重启第二计时器。可选地，该实施方式还可以与第一HARQ进程的HARQ反馈被使能和/或被去使能的情况相结合实施，即第一终端设备和第二终端设备判断第一HARQ进程是否被释放，以及在没有被释放的情况下，判断第一HARQ进程是否被使能，从而确定是否启动或重启第二计时器，但本申请不限于此。
根据上述方案，进行侧行链路通信的多个终端设备，在发送第一数据后的一段时间内不接收或不发送第一HARQ进程对应的该第一信息，在该一段时间后通过第二计时器限制可以发送重传数据的时间长度，在多个终端设备对数据传输的理解一致的基础上，能够进一步的避免终端设备不必要的功率消耗。
可选地，在本申请中，上述第一终端设备启动该第一HARQ进程对应的第一计时器(例如，计时器A或计时器B)时，停止第一终端设备维护的该第一HARQ进程对应的第二计时器，相应地，第二终端设备启动该第一HARQ进程对应的第三计时器(例如，计时器A或计时器C)时，停止第二终端设备维护的该第一HARQ进程对应的第二计时器。
在本申请的另一实施方式中，还可以将上述图2实施例或图3实施例与侧行链路的非连续接收DRX操作相结合实施。
侧行链路的非连续接收操作是指终端设备可以根据非连续接收操作的配置信息非连续地监听SCI。例如，该侧行链路的非连续操作可以被配置以下参数中的一项或多项：
该DRX操作的第一周期；
计时器D(即第四计时器的一例)的最大时长为每个DRX操作的周期开始终端设备处于DRX激活时间的时间长度；
计时器E(即第四计时器的另一例)的最大时长为接收到第二SCI后终端设备处于DRX激活时间的时间长度，该第二SCI用于指示一个新的数据传输。
本申请实施例中的第二终端设备可以进行非连续接收，即第二终端设备为DRX操作的控制信息或数据的接收设备，第一终端设备可以是该DRX操作中发送控制信息或数据的发送设备。该第二终端设备在每个第一周期开始时启动计时器D，在计时器D运行期间检测SCI。在DRX激活时间内接收到第二SCI后第二终端设备启动计时器E，在计时器E运行期间检测SCI。相应地，第一终端设备也在第二终端设备非连续接收的每个周期开始时启动计时器D，以及在发送第二SCI后启动计时器E，并且在第二终端设备的DRX激活时间内向第二终端设备发送SCI或数据。
该DRX操作的配置信息还可以包括该第三计时器的最大时长和/或该第二计时器的最大时长。
该第二终端设备在第二计时器运行期间处于DRX操作的激活时间，第三计时器运行期间为DRX操作的非激活时间。
可选地，该DRX操作还可以配置第二周期，该第二周期小于该第一周期。以及与第二周期的DRX操作相对应的计时器F，该计时器F的最大时长为终端设备可以应用第二 周期的DRX操作的最大时间长度。该计时器F超时后终端设备停止应用第二周期的DRX操作，开始第一周期的DRX操作。也就是说，该计时器F超时后终端设备将DRX操作的周期由第二周期变更(或切换)为第一周期。其中，计时器D和计时器E既适用于第一周期又适用于第二周期。也就是说，在第二终端设备执行第二周期的DRX操作时，在每个第二周期的开始时刻第一终端设备和第二终端设备启动计时器D，以及第一终端设备发送第二SCI后启动计时器E，第二终端设备接收到第二SCI后，启动计时器E。
根据上述方案，在第一终端设备和第二终端设备分别作为DRX操作的发送设备和接收设备执行DRX操作，通过计时器控制终端设备对数据的收发，使得进行DRX操作的终端设备对收发数据的理解一致，减小终端设备不必要的功率消耗，节省电能。
一种实施方式中，第一终端设备可以接收来自第二终端设备的指示信息A，该指示信息A用于指示启动第二周期的DRX操作或由第一周期的DRX操作变更为第二周期的DRX操作，第一终端设备接收到该指示信息A后启动第二周期的DRX操作并启动第二周期对应的计时器F，在计时器F运行期间可以应用第二周期的DRX操作。相应地，第二终端设备发送指示信息A后启动计时器F，在计时器F运行期间应用第二周期的DRX操作。该计时器F超时后第一终端设备和第二终端设备将DRX操作的周期由第二周期变更(或切换)为第一周期。
另一种实施方式中，第一终端设备可以向第二终端设备发送指示信息A，第一终端设备发送指示信息A后启动第二周期的DRX操作并启动计时器F，在计时器F运行期间应用第二周期的DRX操作。相应地，第二终端设备接收到来自第一终端设备的指示信息A后启动计时器F，在计时器F运行期间应用第二周期的DRX操作。该计时器F超时后第一终端设备和第二终端设备将DRX操作的周期由第二周期变更(或切换)为第一周期。
一种实施方式中，第一终端设备可以接收来自第二终端设备的指示信息B，该指示信息B用于指示启动第一周期的DRX操作，第一终端设备接收到该指示信息B后停止计时器F并启动第一周期的DRX操作。相应地，第二终端设备发送指示信息B后停止计时器F启动第一周期的DRX操作。
例如，该第一终端设备在执行第二周期的DRX操作，该计时器F正在运行。第一终端设备在每个周期(第二周期)内的DRX激活时间内可以向第二终端设备发送控制信息或数据，当接收到第二终端设备发送的指示信息B后，该第一终端设备停止计时器F并将DRX操作的周期由第二周期变更(或切换)为第一周期。
另一种实施方式中，第一终端设备可以向第二终端设备发送指示信息B，第一终端设备发送指示信息B后停止计时器F并启动第一周期的DRX操作。相应地，第二终端设备接收到来自第一终端设备的指示信息B后停止计时器F并启动第一周期的DRX操作。
根据上述方案，进行侧行链路通信的终端设备可以根据业务需求，通过指示信息A切换侧行链路DRX操作的周期，在减小终端设备功率消耗的同时增加了数据收发的灵活性。
本申请中的第二终端设备可以是一个或多个，例如，该第一终端设备进行侧行链路组播或广播的情况下，多个第二终端设备接收到来自第一终端设备组播或广播的第一数据后均启动或重启计时器A。
作为示例非限定，该指示信息A和/或该指示信息B可以是MAC控制元素(control element，CE)，例如，该指示信息A可以写作DRX Command MAC CE或SL DRX Command  MAC CE，该指示信息B可以写作Long DRX Command MAC CE或SL Long DRX Command MAC CE，但本申请不限于此。
可选地，第一终端设备和第二终端设备接收到指示信息A和/或指示信息B后，停止计时器D和/或计时器E。
根据上述方案，通过规定进行侧行链路通信的多个终端设备的行为，使得发送设备和接收设备的行为保持一致，能够在保证正常通信的情况下减小终端设备的功率消耗，节省电能。
图5本申请实施例提供的侧行链路通信方法的另一例示意性流程图。
S510，第一终端设备确定发送第二信息，该第二信息用于指示停止第四计时器。
该第四计时器运行期间为第二终端设备和第一终端设备之间的DRX操作的激活时间。可选地，该第二信息可以是指示信息A或指示信息B，该第四计时器可以包括但不限于计时器D和/或计时器E。
根据上述方案，第一终端设备通过第二信息指示第二终端设备停止第四计时器，以使第一终端设备与第二终端设备之间的DRX操作进入非激活时间，能够使第一终端设备在不满足DRX操作条件的情况下及时指示停止第四计时器，减小终端设备不必要的功率消耗。
可选地，第一终端设备可以根据以下一种或多种条件确定发送该第二信息：
该第一终端设备电量小于或等于阈值、该第一终端设备的业务需求指示停止该第四计时器、该第一终端设备建立的单播连接数量大于或等于阈值、或者SL链路质量小于或等于阈值。
可选地，该S510可以由第一终端设备的MAC层执行，例如，第一终端设备的MAC层可以根据发送第二信息的条件是否满足，确定是否发送第二信息，或者，第一终端设备可以根据接收到的指示信息C确定是否发送该第二信息，该指示信息C可以来自物理层、无线资源控制(radio resource control，RRC)层或V2X层。
第一终端设备在S510后，确定(或选择)发送该第二信息的第一资源以发送该第二信息。
一种实施方式中，该第一终端设备确定发送第二信息后，启动第五计时器。第五计时器运行期间为该第一终端设备可以发送第二信息的时间，也就是说，该第一终端设备需要在第五计时器运行期间确定第一资源并在该第一资源上发送该第二信息。第一终端设备发送第二信息后停止该第五计时器。若第五计时器运行期间该第一终端设备未确定(或选择到)第一资源，或者说，第五计时器超时后第一终端设备未发送该第二信息，则该第一终端设备不发送该第二信息，以节省功率消耗。
另一种实施方式中，第二信息用于指示停止一个周期(例如正在执行DRX操作的周期，或正在执行DRX操作的周期的下一个周期，可以称为周期A，但本申请不限于此)内的第四计时器，该周期A的周期长度可以是第一周期也可以是第二周期。该第一终端设备在该周期A结束前未确定(或选择到)第一资源，则该第一终端设备不发送该第二信息。由于第二信息所作用的周期已经结束，因此该第一终端设备无需再发送该第二信息，以节省功率消耗。
第一终端设备选择第一资源的方式包括但不限于以下一种或多种。
方式一
S520，该第一终端设备向第一网络设备发送第三信息，该第三信息用于请求该第一资源。
相应的，该第一网络设备接收来自该第一终端设备的该第三信息。该第一网络设备为第一终端设备建立无线通信连接的网络设备。
可选地，该第三信息可以是调度请求(scheduling request，SR)。
可选地，该第一终端设备在第二资源上向该第一网络设备发送该第三信息，其中该第二资源为发送该第三信息的专用资源。也就是说，该第二资源为该第一终端设备发送用于请求第一资源的请求信息(即该第三信息)的专用资源。
可选地，在S520之前，该第一终端设备可以接收来自第一网络设备的第八信息，该第八信息用配置第二资源。例如，该第八信息中包括SR配置信息的标识，该标识对应的SR配置信息用于配置一个或多个SR资源，该第二资源为该一个或多个SR资源中的一个SR资源，但本申请不限于此。
S521，该第一网络设备向该第一终端设备发送的第四信息，该第四信息用于指示该第一资源。
相应地，该第一终端设备接收来自该第一网络设备的第四信息，终端设备根据该第四信息确定该第一资源。
方式二
S520，该第一终端设备在配置授权资源中确定第一资源。
例如，该第一网络设备为该第一终端设备配置了配置授权(configured grant，CG)资源，该第一终端设备在配置授权资源中确定用于发送该第二信息的第一资源。
可选地，该第一终端设备启动该第五计时器，该第一资源为该第五计时器运行期间内的配置授权资源。若该第五计时器的时长范围内不包括配置授权资源则该第一终端设备不发送该第二信息。
可选地，该第二指示信息指示停止周期A内的第四计时器，该第一资源为该周期A内的配置授权资源。若该周期A内不包括配置授权资源则该第一终端设备不发送该第二信息。
方式三
S520，该第一终端设备在用于竞争的侧行链路资源中确定第一资源。
例如，该第一终端设备采用侧行链路mode2传输模式，在第一网络设备配置的用于竞争的侧行链路资源中竞争资源，将竞争到的资源确定为第一资源，或者说，该第一终端设备在竞争到的资源上发送该第二信息。
可选地，该第一终端设备启动该第五计时器，若第一终端设备在第五计时器运行期间竞争到资源，则该竞争到的资源可以作为第一资源发送该第二信息；若第一终端设备在第五计时器运行期间未竞争到资源或第五计时器运行期间不包括用于竞争的侧行链路资源，则该第一终端设备不发送第二信息。
可选地，该第二信息指示停止周期A内的第四计时器，若第一终端设备竞争到周期A的资源，则该竞争到的资源可以作为第一资源发送该第二信息；若第一终端设备未竞争到周期A内的资源或该周期A内不包括用于竞争的侧行链路资源，则该第一终端设备不发 送第二信息。
根据上述方案，该第一终端设备通过上述方式中的一种方式确定第一资源，使得终端设备能够有资源发送第二信息，从而及时停止第四计时器，避免终端设备不必要的功率消耗。确定第一资源后，第一终端设备执行S530。
S530，第一终端设备在第一资源上向该第二终端设备发送该第二信息。
相应地，该第二终端设备接收承载在该第一资源上的来自该第一网络设备的第二信息。可选地，在第一终端设备发送第二信息之前，该第一终端设备判断发送该第二信息的事件是否取消，在没有取消的情况下，该第一终端设备向在第一资源上向该第二终端设备发送该第二信息。
可选地，该第二终端设备接收到该第二信息后，可以执行S540，向第二网络设备发送第六信息，该第六信息用于指示该第二终端设备接收到了来自第一终端设备停止该第四计时器的信息。或者该第六信息用于指示该第二终端设备请求停止该第四计时器(即该第二终端设备与该第一终端设备之间的计时器)。可选地，该第二终端设备为RRC连接态或该第二终端设备采用侧行链路mode1传输方式的情况下执行S540。作为示例非限定，该第六信息为RRC消息、MAC CE或上行控制信息(uplink control information，UCI)中的一种或多种。
需要说明的是，在图5所示的实施例中，该第二终端设备与第一终端设备进行DRX操作，该第二终端设备可以是该DRX操作中的执行非连续接收的终端设备，相应的该第一终端设备可以是该DRX操作中的控制信息或数据的发送设备。或者，该第一终端设备可以是该DRX操作中的执行非连续接收的终端设备，相应的该第二终端设备可以是该DRX操作中的控制信息或数据的发送设备。
图6本申请实施例提供的侧行链路的通信方法的另一例示意图。
S610，第一终端设备与第二终端设备之间建立单播连接。
第一终端设备和第二终端设备可以通过建立单播连接进行通信。
S620，该第一终端设备与该第二终端设备进行能力信息交互。
该第一终端设备与该第二终端设备建立单播连接后，可以交互相互之间的能力信息。
例如，该第一终端设备向该第二终端设备发送能力信息的请求消息，该第二终端设备接收到该请求消息后向该第一终端设备发送该第二终端设备的能力信息。可选地，该请求消息中还可以包括该第一终端设备的能力信息。作为示例非限定，该能力信息可以是侧行链路通信相关的能力信息，例如，该侧行链路相关的能力信息包括但不限于以下一项或多项：
是否支持侧行链路的DRX、是否支持侧行链路的长周期(即第一周期)的DRX或是否支持侧行链路的短周期(即第二周期)的DRX。
根据上述方案，通过能力交互确定建立侧行链路的终端设备的能力，以便后续通信正常进行。可选地，该第一终端设备在接收到该第二终端设备的能力信息后，可以在S630向第一网络设备发送第一消息。可选地，该第一消息可以是终端设备的侧行链路消息，例如该终端设备的侧行链路消息可以写作SidelinkUEInformation。或者该第一消息可以是终端设备辅助消息中，例如该终端设备辅助消息可以写作UEAssistanceInformation，或者该第一消息可以是其他RRC消息中。
可选地，该第一消息包括第七信息，该第七信息用于指示该第一终端设备需要发送第二信息(例如，上述图5实施中的第二信息)。可选地，该第七信息可以包括第二终端设备的标识信息(例如，层2标识等)，以通知该第一网络设备该第一终端设备需要向该第二终端设备发送该第二信息。该第七信息还可以包括该第二信息是否支持HARQ反馈、该第二信息的最大传输次数或该第二信息的长度中的一项或多项信息，但本申请不限于此。
可选地，第一终端设备向该第一网络设备发送该第一消息后，该第一网络设备在S640中向该第一终端设备发送第二消息。该第二消息中包括第八信息，该第八信息用于配置上述图5实施例中第二资源，例如，该第八信息中包括SR配置信息的标识。
可选地，该第二消息还可以包括配置授权资源的配置信息。该配置授权资源可以是第一类型的配置授权(configured grant type1)资源和/或第二类型的配置授权(configured grant type2)资源。
根据上述方案，终端设备向网络设备上报侧行链路的相关信息，以便网络设备为终端设备配置用于侧行链路的资源，使得终端设备利用配置资源进行侧行链路通信。应理解，上述实施例中，各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
以上，结合图2至图6详细说明了本申请实施例提供的方法。以下，结合图7至图9详细说明本申请实施例提供的装置。
图7是本申请实施例提供的通信装置的示意性框图。如图7所示，该通信装置700可以包括处理单元710和收发单元720。
示例性的，该通信装置700可以是终端设备，可以是车载通信装置，或者包含于该终端设备的装置，比如各种类型的车辆，或者是终端设备中包含的装置，比如系统芯片等；示例性的，该通信装置700也可以用于实现上述实施例中涉及的网络设备或者网络设备中的系统芯片等；示例性的，该通信装置700可以包括实现上述实施例中的方法操作相应的模块、单元、或手段(means)，该模块、单元、或means可以通过硬件实现，软件实现，或者通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块或单元。
在一种可能的设计中，该通信装置700可对应于上文方法实施例中的第一终端设备，或者配置于(或用于)第一终端设备中的芯片。
应理解，该通信装置700可对应于根据本申请实施例的方法200、300、500、600中的第一终端设备，该通信装置700可以包括用于执行前述实施例比如图2、图3、图5或图6中的方法200、300、500、600中第一终端设备执行的方法的单元。该通信装置700中的各单元和上述其他操作和/或功能分别为了实现图2、图3、图5或图6中的方法200、300、500、600的相应流程。
示例性的，当该通信装置700用于执行图2中的方法200，收发单元720可用于执行方法200中的S210，处理单元710可用于执行方法200中的S220、S230。当该通信装置700用于执行图3中的方法300，收发单元720可用于执行方法300中的S310，处理单元710可用于执行方法300中的S320。当该通信装置700用于执行图5中的方法500，收发单元720可用于执行方法500中的方式一中的S520和S521，以及方法500中的S530，处 理单元710可用于执行方法500中的S510、方式二或方式三中的S520。当该通信装置700用于执行图6中的方法600，收发单元720可用于执行方法600中的S630、S640，处理单元710可用于执行方法600中的S610、S620。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
在另一种可能的设计中，该通信装置700可对应于上文方法实施例中的第二终端设备，或者配置于(或用于)第二终端设备中的芯片。
应理解，该通信装置700可对应于根据本申请实施例的方法200、300、500、600中的第二终端设备，该通信装置700可以包括用于执行前述实施例比如图2、图3、图5或图6中的方法200、300、500、600中第二终端设备执行的方法的单元。该通信装置700中的各单元和上述其他操作和/或功能分别为了实现图2、图3、图5或图6中的方法200、300、500、600的相应流程。
示例性的，当该通信装置700用于执行图2中的方法200，收发单元720可用于执行方法200中的S210，处理单元710可用于执行方法200中的S220、S230。当该通信装置700用于执行图3中的方法300，收发单元720可用于执行方法300中的S310，处理单元710可用于执行方法300中的S330、S340。当该通信装置700用于执行图5中的方法500，收发单元720可用于执行方法500中的S530、S540。当该通信装置700用于执行图6中的方法600，处理单元710可用于执行方法600中的S610、S620。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
可选地，通信装置700还可以包括存储单元，该存储单元可以用于存储指令或者数据，处理单元710可以执行该存储单元中存储的指令或者数据，以使该通信装置实现相应的操作，该通信装置700中的该通信装置700中的收发单元720为可对应于图8中示出的终端设备800中的收发器810，存储单元可对应于图8中示出的终端设备800中的存储器。
应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
还应理解，该通信装置700为终端设备时，该通信装置700中的收发单元720为可通过通信接口(如收发器或输入/输出接口)实现，例如可对应于图8中示出的终端设备800中的收发器810，该通信装置700中的处理单元710可通过至少一个处理器实现，例如可对应于图8中示出的终端设备800中的处理器820，该通信装置700中的处理单元710可通过至少一个逻辑电路实现。可选地，该收发器可以为收发电路。可选地，该输入/输出接口可以为输入/输出电路。
还应理解，该通信装置700为配置于(或用于)终端设备中的芯片时，该通信装置700中的收发单元720可以为芯片的输入/输出接口或电路，该通信装置700中的处理单元710可以为芯片中的处理器。
在另一种可能的设计中，该通信装置700可对应于上文方法实施例中的第一网络设备，或者配置于(或用于)第一网络设备中的芯片。
应理解，该通信装置700可对应于根据本申请实施例的方法500、600中的第一网络设备，该通信装置700可以包括用于执行图5或图6中的方法500、600中第一网络设备执行的方法的单元。该通信装置700中的各单元和上述其他操作和/或功能分别为了实现图5或图6中的方法500、600的相应流程。
示例性的，当该通信装置700用于执行图5中的方法500，收发单元720可用于执行方法500中的S520、S521。当该通信装置700用于执行图6中的方法600，收发单元720可用于执行方法600中的S630、S640。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
在另一种可能的设计中，该通信装置700可对应于上文方法实施例中的第二网络设备，或者配置于(或用于)第二网络设备中的芯片。
应理解，该通信装置700可对应于根据本申请实施例的方法500中的第二网络设备，该通信装置700可以包括用于执行图5中的方法500中第二网络设备执行的方法的单元。该通信装置700中的各单元和上述其他操作和/或功能分别为了实现图5中的方法500的相应流程。
示例性的，当该通信装置700用于执行图5中的方法500，收发单元720可用于执行方法500中的S540。应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
可选地，通信装置700还可以包括存储单元，该存储单元可以用于存储指令或者数据，处理单元710可以执行该存储单元中存储的指令或者数据，以使该通信装置实现相应的操作，该通信装置700中的该通信装置700中的收发单元720为可对应于图9中示出的网络设备900中的收发器910，存储单元可对应于图9中示出的网络设备900中的存储器。
应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
还应理解，该通信装置700为网络设备时，该通信装置700中的收发单元720为可通过通信接口(如收发器或输入/输出接口)实现，例如可对应于图9中示出的网络设备900中的收发器910，该通信装置700中的处理单元710可通过至少一个处理器实现，例如可对应于图9中示出的网络设备900中的处理器920，该通信装置700中的处理单元710可通过至少一个逻辑电路实现。可选地，该收发器可以为收发电路。可选地，该输入/输出接口可以为输入/输出电路。
还应理解，该通信装置700为配置于(或用于)网络设备中的芯片时，该通信装置700中的收发单元720可以为芯片的输入/输出接口或电路，该通信装置700中的处理单元710可以为芯片中的处理器。
图8是本申请实施例提供的终端设备800的结构示意图。该终端设备800可应用于如图1所示的系统中，执行上述方法实施例中终端设备的功能。如图所示，该终端设备800包括处理器820和收发器810。可选地，该终端设备800还包括存储器830。示例性的，处理器820、收发器810和存储器830之间可以通过内部连接通路互相通信，传递控制和/或数据信号，该存储器用于存储计算机程序，该处理器820用于执行该存储器830中的该计算机程序，以控制该收发器810收发信号。可选地，该终端设备800可以包括总线系统840，该收发器810、处理器820和存储器830之间可以通过总线系统840传递信息。
上述处理器820可以和存储器830可以合成一个处理装置，处理器820用于执行存储器中830存储的程序代码来实现上述功能。具体实现时，该存储器也可以集成在处理器820中，或者独立于处理器820。该处理器820可以与图7中的处理单元对应。
上述收发器810可以与图7中的收发单元720对应。收发器810可以包括接收器(或 称接收机、接收电路)和发射器(或称发射机、发射电路)。示例性的，接收器用于接收信号，发射器用于发射信号。
应理解，图8所示的终端设备800能够实现图2、图3或图5所示方法实施例中涉及终端设备的各个过程。终端设备800中的各个模块的操作和/或功能，分别为了实现上述方法实施例中的相应流程。具体可参见上述方法实施例中的描述，为避免重复，此处适当省略详细描述。
上述处理器820可以用于执行前面方法实施例中描述的由终端设备内部实现的动作，而收发器810可以用于执行前面方法实施例中描述的终端设备向网络设备发送或从网络设备接收的动作。具体请见前面方法实施例中的描述，此处不再赘述。
可选地，上述终端设备800还可以包括电源，用于给终端设备中的各种器件或电路提供电源。
除此之外，为了使得终端设备的功能更加完善，该终端设备800还可以包括输入单元、显示单元、音频电路、摄像头和传感器等中的一个或多个，所述音频电路还可以包括扬声器、麦克风等。
图9是本申请实施例提供的网络设备900的结构示意图。该网络设备900可应用于如图1或图2所示的系统中，执行上述方法实施例中网络设备的功能。如图所示，该网络设备900包括处理器920和收发器910。可选地，该网络设备900还包括存储器。示例性的，处理器920、收发器910和存储器之间可以通过内部连接通路互相通信，传递控制和/或数据信号，该存储器用于存储计算机程序，该处理器920用于执行该存储器中的该计算机程序，以控制该收发器910收发信号。可选地，该网络设备900的该收发器910可以包括天线和\或射频电路。
应理解，图9所示的网络设备900能够实现图2、图3或图5所示方法实施例中涉及网络设备的各个过程。网络设备900中的各个模块的操作和/或功能，分别为了实现上述方法实施例中的相应流程。具体可参见上述方法实施例中的描述，为避免重复，此处适当省略详细描述。
应理解，图9所示出的网络设备900仅为网络设备的一种可能的架构，而不应对本申请构成任何限定。本申请所提供的方法可适用于其他架构的网络设备。例如，包含CU、DU和AAU的网络设备等。本申请对于网络设备的具体架构不作限定。
本申请实施例还提供了一种处理装置，包括处理器和存储器。该处理器用于读取存储器中存储的指令，并可通过接收器接收信号，通过发射器发射信号，以执行上述任一方法实施例中的方法。
应理解，上述处理装置可以是一个或多个芯片。例如，该处理装置可以是现场可编程门阵列(field programmable gate array，FPGA)，可以是专用集成芯片(application specific integrated circuit，ASIC)，还可以是系统芯片(system on chip，SoC)，还可以是中央处理器(central processor unit，CPU)，还可以是网络处理器(network processor，NP)，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。
在实现过程中，上述方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件 形式的指令完成。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应注意，本申请实施例中的处理器可以是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(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。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。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。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。示例性的，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
根据本申请实施例提供的方法，本申请还提供一种计算机程序产品，该计算机程序产品包括：计算机程序代码，当该计算机程序代码由一个或多个处理器执行时，使得包括该处理器的装置执行图2、图3、图5或图6所示实施例中的方法。
根据本申请实施例提供的方法，本申请还提供一种计算机可读存储介质，该计算机可读存储介质存储有程序代码，当该程序代码由一个或多个处理器运行时，使得包括该处理器的装置执行图2、图3、图5或图6所示实施例中的方法。
根据本申请实施例提供的方法，本申请还提供一种系统，其包括前述的一个或多个网络设备。该系统还可以包括前述的一个或多个终端设备。
上述各个装置实施例中网络设备与终端设备和方法实施例中的网络设备或终端设备完全对应，由相应的模块或单元执行相应的步骤，例如通信单元(收发器)执行方法实施例中接收或发送的步骤，除发送、接收外的其它步骤可以由处理单元(处理器)执行。具 体单元的功能可以参考相应的方法实施例。示例性的，处理器可以为一个或多个。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disc，SSD))等。
上述各个装置实施例中网络设备与终端设备和方法实施例中的网络设备或终端设备完全对应，由相应的模块或单元执行相应的步骤，例如通信单元(收发器)执行方法实施例中接收或发送的步骤，除发送、接收外的其它步骤可以由处理单元(处理器)执行。具体单元的功能可以参考相应的方法实施例。其中，处理器可以为一个或多个。
在本说明书中使用的术语“部件”、“模块”、“系统”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件、或执行中的软件。例如，部件可以是但不限于，在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序和/或计算机。通过图示，在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程和/或执行线程中，部件可位于一个计算机上和/或分布在2个或更多个计算机之间。此外，这些部件可从在上面存储有各种数据结构的各种计算机可读介质执行。部件可例如根据具有一个或多个数据分组(例如来自与本地系统、分布式系统和/或网络间的另一部件交互的二个部件的数据，例如通过信号与其它系统交互的互联网)的信号通过本地和/或远程进程来通信。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，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。
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，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、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系统，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。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以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。
在上述实施例中，各功能单元的功能可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令(程序)。在计算机上加载和执行所述计算机程序指令(程序)时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
所述功能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，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请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部分可以以软件产品的形式体现出来，该计算机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台计算机设备(可以是个人计算机，服务器，或者网络设备等)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、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，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，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，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 (42)

  1. 一种无线通信方法，其特征在于，包括：
    第一终端设备向第二终端设备发送第一数据后，启动或重启第一计时器，所述第一数据与第一混合自动重传请求HARQ进程对应；
    所述第一终端设备在所述第一计时器超时后，向所述第二终端设备发送第一信息，所述第一信息指示所述第一终端设备调度所述第一HARQ进程对应的重传数据。
  2. 根据权利要求1所述的方法，其特征在于，所述启动或重启第一计时器，包括：
    所述第一HARQ进程的HARQ反馈被使能，所述第一终端设备接收到来自所述第二终端设备的HARQ反馈信息后，启动或重启所述第一计时器，所述HARQ反馈信息与所述第一HARQ进程相对应。
  3. 根据权利要求2所述的方法，其特征在于，所述HARQ反馈信息指示未成功接收到所述第一数据。
  4. 根据权利要求1所述的方法，其特征在于，所述第一HARQ进程的HARQ反馈被去使能。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一计时器超时后，所述第一终端设备启动或重启第二计时器；
    所述第一终端设备在第二计时器运行期间发送与所述第一HARQ进程对应的重传数据。
  6. 根据权利要求5所述的方法，其特征在于，所述方法还包括：
    所述第二计时器超时后，所述第一终端设备释放所述第一HARQ进程或重启所述第一计时器。
  7. 一种无线通信方法，其特征在于，包括：
    第二终端设备接收到第一终端设备的第一数据后，启动或重启第三计时器，所述第一数据与第一混合自动重传请求HARQ进程对应；
    所述第二终端设备在第三计时器超时后，监听来自所述第一终端设备的第一信息，所述第一信息指示所述第一终端设备调度所述第一HARQ进程的重传数据。
  8. 根据权利要求7所述的方法，其特征在于，所述启动或重启第三计时器，包括：
    所述第一HARQ进程的HARQ反馈被使能，所述第二终端设备向所述第一终端设备发送HARQ反馈信息后，启动或重启所述第三计时器，所述HARQ反馈信息与所述第一HARQ进程相对应。
  9. 根据权利要求8所述的方法，其特征在于，所述HARQ反馈信息指示未成功接收到所述第一数据。
  10. 根据权利要求7所述的方法，其特征在于，所述第一HARQ进程的HARQ反馈被去使能。
  11. 根据权利要求7至10中任一项所述的方法，其特征在于，所述方法还包括：
    所述第三计时器超时后，所述第二终端设备启动或重启第二计时器；
    所述第二终端设备在所述第二计时器运行期间接收所述第一HARQ进程对应的重传 数据。
  12. 根据权利要求11所述的方法，其特征在于，所述方法还包括：
    所述第二计时器超时后，所述第二终端设备释放所述第一HARQ进程或重启第三计时器。
  13. 一种通信方法，其特征在于，包括：
    第一终端设备确定第一资源，所述第一资源用于承载第二信息，所述第二信息用于指示停止第四计时器，所述第四计时器运行期间为所述第一终端设备与所述第二终端设备之间的DRX操作的激活时间；
    所述第一终端设备向所述第二终端设备发送所述第二信息，所述第二信息承载在所述第一资源上。
  14. 根据权利要求13所述的方法，其特征在于，所述第一终端设备确定第一资源，包括：
    所述第一终端设备向第一网络设备发送第三信息，所述第三信息用于请求所述第一资源；
    所述第一终端设备根据来自所述第一网络设备的第四信息，确定所述第一资源，所述第四信息用于指示所述第一资源。
  15. 根据权利要求14所述的方法，其特征在于，在所述第一终端设备向所述网络设备发送第三信息之前，所述方法还包括：
    所述第一终端设备接收所述第一网络设备发送的第五信息，所述第五信息用于指示第二资源，所述第二资源为用于承载所述第三信息的专用资源。
  16. 根据权利要求13所述的方法，其特征在于，所述第一资源为配置授权资源，或者，所述第一资源为所述第一终端设备竞争到的侧行链路资源。
  17. 根据权利要求13至16中任一项所述的方法，其特征在于，在所述第一终端设备确定所述第一资源之前，所述方法还包括：
    所述第一终端设备确定发送所述第二信息，并启动第五计时器，以及，所述第一终端设备向所述第二终端设备发送所述第二信息，包括：
    所述第一终端设备在所述第五计时器运行期间向所述第二终端设备发送所述第二信息。
  18. 根据权利要求17所述的方法，其特征在于，所述方法还包括:
    所述第一终端设备发送所述第二信息后，停止所述第五计时器，或者，
    当所述第五计时器运行超时，且所述第一终端设备未确定用于发送所述第二信息的资源时，所述第一终端设备确定不向所述第二终端设备发送所述第二信息。
  19. 根据权利要求13至18中任一项所述的方法，其特征在于，所述第二信息为媒体接入控制控制元素MAC CE。
  20. 一种无线通信装置，其特征在于，包括：处理单元和收发单元；
    所述处理单元，用于在所述收发单元向第二终端设备发送第一数据后，启动或重启第一计时器，所述第一数据与第一混合自动重传请求HARQ进程对应；
    所述收发单元，用于在所述第一计时器超时后，向所述第二终端设备发送第一信息，所述第一信息指示第一终端设备调度所述第一HARQ进程对应的重传数据。
  21. 根据权利要求20所述的装置，其特征在于，所述处理单元具体用于，
    所述第一HARQ进程的HARQ反馈被使能，所述收发单元接收到来自所述第二终端设备的HARQ反馈信息后，启动或重启所述第一计时器，所述HARQ反馈信息与所述第一HARQ进程相对应。
  22. 根据权利要求21所述的装置，其特征在于，所述HARQ反馈信息指示未成功接收到所述第一数据。
  23. 根据权利要求20所述的装置，其特征在于，所述第一HARQ进程的HARQ反馈被去使能。
  24. 根据权利要求20至23中任一项所述的装置，其特征在于，
    所述处理单元，还用于在所述第一计时器超时后，启动或重启第二计时器；
    所述收发单元，还用于在第二计时器运行期间发送与所述第一HARQ进程对应的重传数据。
  25. 根据权利要求24所述的装置，其特征在于，
    所述处理单元，还用于在所述第二计时器超时后，释放所述第一HARQ进程或重启所述第一计时器。
  26. 一种无线通信装置，其特征在于，包括：处理单元和收发单元；
    所述处理单元，用于在所述收发单元接收到第一终端设备的第一数据后，启动或重启第三计时器，所述第一数据与第一混合自动重传请求HARQ进程对应；
    所述收发单元，用于在第三计时器超时后，监听来自所述第一终端设备的第一信息，所述第一信息指示所述第一终端设备调度所述第一HARQ进程的重传数据。
  27. 根据权利要求26所述的装置，其特征在于，所述处理单元具体用于，
    所述第一HARQ进程的HARQ反馈被使能，所述收发单元向所述第一终端设备发送HARQ反馈信息后，启动或重启所述第三计时器，所述HARQ反馈信息与所述第一HARQ进程相对应。
  28. 根据权利要求27所述的装置，其特征在于，所述HARQ反馈信息指示未成功接收到所述第一数据。
  29. 根据权利要求26所述的装置，其特征在于，所述第一HARQ进程的HARQ反馈被去使能。
  30. 根据权利要求26至29中任一项所述的装置，其特征在于，
    所述处理单元，还用于在所述第三计时器超时后，启动或重启第二计时器；
    所述收发单元，还用于在所述第二计时器运行期间接收所述第一HARQ进程对应的重传数据。
  31. 根据权利要求30所述的装置，其特征在于，
    所述处理单元，还用于在所述第二计时器超时后，释放所述第一HARQ进程或重启第三计时器。
  32. 一种通信装置，其特征在于，包括：处理单元和收发单元；
    所述处理单元，用于确定第一资源，所述第一资源用于承载第二信息，所述第二信息用于指示停止第四计时器，所述第四计时器运行期间为第一终端设备与第二终端设备之间的DRX操作的激活时间；
    所述收发单元，用于向所述第二终端设备发送所述第二信息，所述第二信息承载在所述第一资源上。
  33. 根据权利要求32所述的装置，其特征在于，
    所述收发单元，具体用于向第一网络设备发送第三信息，所述第三信息用于请求所述第一资源；
    所述处理单元，具体用于根据来自所述第一网络设备的第四信息，确定所述第一资源，所述第四信息用于指示所述第一资源。
  34. 根据权利要求33所述的装置，其特征在于，
    所述收发单元，还用于接收所述第一网络设备发送的第五信息，所述第五信息用于指示第二资源，所述第二资源为用于承载所述第三信息的专用资源。
  35. 根据权利要求32所述的装置，其特征在于，所述第一资源为配置授权资源，或者，所述第一资源为所述第一终端设备竞争到的侧行链路资源。
  36. 根据权利要求32至35中任一项所述的装置，其特征在于，
    所述处理单元，还用于确定发送所述第二信息，并启动第五计时器；
    所述收发单元，还用于在所述第五计时器运行期间向所述第二终端设备发送所述第二信息。
  37. 根据权利要求36所述的装置，其特征在于，
    所述处理单元，还用于在所述收发单元发送所述第二信息后，停止所述第五计时器，或者，
    当所述第五计时器运行超时，且所述处理单元未确定用于发送所述第二信息的资源时，所述处理单元确定不向所述第二终端设备发送所述第二信息。
  38. 根据权利要求32至37中任一项所述的装置，其特征在于，所述第二信息为媒体接入控制控制元素MAC CE。
  39. 一种通信装置，其特征在于，包括至少一个处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令；
    所述至少一个处理器用于执行所述程序或指令，以使所述装置实现如权利要求1至6中任一项所述的方法，或者，实现如权利要求7至12中任一项所述的方法，或者，实现如权利要求13至19中任一项所述的方法。
  40. 一种计算机可读存储介质，其特征在于，包括计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1至19中任一项所述的方法。
  41. 一种计算机程序产品，其特征在于，包括计算机程序，当所述计算机程序被运行时，使得所述计算机执行如权利要求1至19中任意一项所述的方法。
  42. 一种通信系统，其特征在于，包括如权利要求20至25中任一项或权利要求32至38中任一项所述的装置，和如权利要求26至31中任一项所述的装置。
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