WO2021204164A1 - 一种通信方法及设备 - Google Patents

一种通信方法及设备 Download PDF

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Publication number
WO2021204164A1
WO2021204164A1 PCT/CN2021/085831 CN2021085831W WO2021204164A1 WO 2021204164 A1 WO2021204164 A1 WO 2021204164A1 CN 2021085831 W CN2021085831 W CN 2021085831W WO 2021204164 A1 WO2021204164 A1 WO 2021204164A1
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WIPO (PCT)
Prior art keywords
communication device
timer
transmission
duration
resource
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PCT/CN2021/085831
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English (en)
French (fr)
Inventor
刘俊
常俊仁
谢曦
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21784488.5A priority Critical patent/EP4120734A4/en
Publication of WO2021204164A1 publication Critical patent/WO2021204164A1/zh
Priority to US17/960,596 priority patent/US20230023698A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • 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
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • 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
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • This application relates to the field of communication, and in particular to a communication method and device.
  • the new radio (NR) system is the current mainstream wireless communication technology. It aims to support V2X with lower latency and higher reliability in response to the characteristics of the vehicle to everything (V2X) service and new service transmission requirements. Communication.
  • the receiving end user equipment (RX UE) will always monitor the physical sidelink shared channel (PSSCH) to see if there is a ratio between the source and the sending end user equipment ( TX UE) information.
  • PSSCH physical sidelink shared channel
  • the RX UE is not always interacting with the TX UE for effective information, nor does it always perform upload or download services, and there is no data transmission even during communication. Then, when there is no data interaction between the transmitting and receiving UEs, if the RX UE continues to monitor the PSSCH, the power consumption of the RX UE will increase.
  • This application provides a communication method and device to save power consumption of RX UE.
  • this application provides a communication method that can be applied to a sidelink communication system, such as an Internet of Vehicles system.
  • the system may include a first communication device and a second communication device, where the second communication device may be used as The transmitting end device (i.e. TX UE) and the first communication device can be used as the receiving end device (i.e. RX UE).
  • TX UE transmitting end device
  • RX UE receiving end device
  • the first communication device starts the first timer and/or stops the second timer; or, when the side link is When there is a reserved resource for retransmitting the first transmission, and/or the resource used for transmitting the first transmission is the first resource in the at least one resource corresponding to the first transmission, the first communication device stops the second timer .
  • the above-mentioned first transmission may be a transport block (transform block, TB), a medium access control layer packet data unit (medium access control packet data unit, MAC PDU), etc.
  • the second communication device may select at least one resource (for example, 1 to 3 resources) for the first transmission. These resources can be used for the first transmission of the initial transmission, and can also be used for the retransmission of the first transmission.
  • the second communication device can transmit (initial transmission or retransmission) the first transmission to the first communication device on a certain resource among the at least one resource. Then, in the time domain, the first transmission is located in the at least one resource for transmission.
  • the other resources after the transmitted resource are the reserved resources corresponding to the first transmission.
  • the above-mentioned first timer is used to indicate the length of time before the retransmission authorization is received.
  • the first timer is used to indicate the minimum length of time before the communication device receives the retransmission authorization.
  • the minimum length of time to wait before retransmission is authorized;
  • the second timer is used to indicate the length of time to receive the retransmission.
  • the second timer is used to indicate the maximum length of time the communication device receives the retransmission. The maximum length of time to monitor for retransmission.
  • the first timer and the second timer correspond to the HARQ process corresponding to the first transmission.
  • the first communication device determines that there is no reserved resource for retransmitting the first transmission (or the resource currently used for transmitting the first transmission is the last one of the at least one resource). Resource), the first communication device starts the first timer and/or stops the second timer.
  • the first communication device does not need to monitor the SCI associated with the HARQ process corresponding to the first transmission to save power consumption; or, When a communication device determines that there is a retransmission reserved resource in at least one reserved resource, or the resource currently transmitting the first transmission is the first reserved resource in the at least one reserved resource, the first communication device stops the second timer, At this time, the first communication device stops monitoring the physical sidelink control channel (PSCCH) and/or PSSCH to save power consumption.
  • PSCCH physical sidelink control channel
  • the first communication device starts the first timer, which includes: the first communication device sends the hybrid automatic repeater corresponding to the first transmission to the second communication device on the side link. Transmission request hybrid automatic retransmission request, HARQ) and start the first timer after feedback; or, the first communication device starts the first timer at the first symbol after sending the HARQ feedback, or, the first communication device is receiving After the first transmission, the first timer is started.
  • the first timer includes: the first communication device sends the hybrid automatic repeater corresponding to the first transmission to the second communication device on the side link. Transmission request hybrid automatic retransmission request, HARQ) and start the first timer after feedback; or, the first communication device starts the first timer at the first symbol after sending the HARQ feedback, or, the first communication device is receiving After the first transmission, the first timer is started.
  • HARQ Transmission request hybrid automatic retransmission request
  • the first communication device performs HARQ feedback on the first transmission to the second communication device, that is to say, the first communication device sends the first transmission to the second communication device.
  • the HARQ feedback corresponding to the first transmission that is, the first transmission is associated with a certain HARQ process
  • the first communication device starts the first timer after sending the HARQ feedback, or the first communication device starts the first timer after sending the HARQ feedback
  • the following first symbol starts the first timer, so that the first communication device does not need to monitor the SCI associated with the HARQ process corresponding to the first transmission, thereby saving power consumption.
  • the first communication device stops the second timer, including: after the first communication device sends the HARQ feedback corresponding to the first transmission to the second communication device on the side link Stop the second timer; or, the first communication device stops the second timer on the first symbol after sending the HARQ feedback.
  • the first communication device performs HARQ feedback on the first transmission to the second communication device, that is to say, the first communication device sends the first transmission to the second communication device.
  • the HARQ feedback corresponding to the first transmission then, after the first communication device sends the HARQ feedback, the second timer is stopped, so that the first communication device does not need to monitor the SCI associated with the HARQ process corresponding to the first transmission, thereby saving power consumption.
  • the above method further includes: when the first timer expires, and/or the first communication device fails to successfully decode the first transmission sent by the second communication device, the first communication The device starts the second timer, starts to monitor the PSCCH and/or PSSCH, and waits for the retransmission of the first transmission.
  • the first timer of the first communication device has the same duration as the first timer of the second communication device
  • the second timer of the first communication device has the same duration as the first timer of the second communication device.
  • the duration of the second timer of the second communication device is the same; or, the duration of the first timer of the second communication device is n symbols longer than the duration of the first timer of the first communication device, and the second timer of the first communication device is the same as the first timer of the first communication device.
  • the duration of the second timer of the two communication devices is the same, and n is a positive integer.
  • the method before the first communication device starts the first timer, the method further includes: the first communication device determines that the HARQ feedback attribute corresponding to the first transmission is enabled.
  • the HARQ feedback attribute corresponding to the first transmission means that when the network side device, the first communication device, or the second communication device configures the first communication device with a logical channel (LCH), it will configure HARQ for the LCH Feedback attribute.
  • the HARQ feedback attribute is used to indicate whether the LCH supports and/or enables HARQ feedback. Only LCHs with the same HARQ feedback attribute can be encapsulated in one transmission. Then, the HARQ feedback attribute corresponding to the first transmission refers to the HARQ feedback attribute of the LCH encapsulated in the first transmission.
  • the HARQ feedback attribute corresponding to the first transmission means that when the network side device, the first communication device, or the second communication device configures a radio bearer for the first communication device, the HARQ feedback attribute is configured for each bearer.
  • the feedback attribute is used to indicate whether the bearer supports and/or enables HARQ feedback. Then, the HARQ feedback attribute corresponding to the first transmission refers to the HARQ feedback attribute of the bearer corresponding to the first transmission.
  • the method further includes: the first communication device receives first control information from the second communication device;
  • the reserved resource of the first transmission and/or the resource used to transmit the first transmission is the first resource in the at least one resource corresponding to the first transmission; the first communication device according to the first control information, It is determined that there is no reserved resource for retransmitting the first transmission, and/or the resource used for transmitting the first transmission is not the first resource in the at least one resource corresponding to the first transmission.
  • the first control information may be sidelink control information (SCI)
  • the present application provides a communication method that can be applied to a sidelink communication system, such as a car networking system.
  • the system may include a first communication device and a second communication device, where the second communication device may be used as The transmitting end device (i.e. TX UE) and the first communication device can be used as the receiving end device (i.e. RX UE).
  • TX UE The transmitting end device
  • RX UE the receiving end device
  • the second communication device starts the first timer and/or stops the second timer.
  • the first timer is used to indicate the transmission retransmission.
  • the second timer is used to indicate the length of time to send retransmission; or, when there are reserved resources for retransmission of the first transmission on the side link, and/or resources for transmission of the first transmission
  • the second communication device stops the second timer, and the at least one reserved resource corresponding to the first transmission is obtained by performing resource selection for the first transmission.
  • the first timer and the second timer set on both sides of the first communication device and the second communication device are symmetrical.
  • the first communication device starts the first timer
  • the second communication device starts the first timer at the same time
  • the first communication device starts or stops the second timer
  • the second communication device starts or stops the second timer at the same time.
  • the first timer and the second timer correspond to the HARQ process corresponding to the first transmission.
  • the method further includes: when the first timer expires, the second communication device starts the second timer.
  • the second communication device starts the first timer, including: the second communication device starts the first timer after receiving the HARQ feedback from the first communication device; or, After sending the first transmission, the second communication device delays m symbols to start the first timer, where m is a positive integer; or, after sending the first transmission, the second communication device starts the first timer.
  • the second communication device stopping the second timer includes: after the second communication device sends the first transmission to the first communication device on the side link, stopping the second timing Device.
  • the first timer of the second communication device has the same duration as the first timer of the first communication device, and the second timer of the first communication device has the same duration as the first timer of the first communication device.
  • the duration of the second timer of the second communication device is the same; or, the duration of the first timer of the second communication device is n symbols longer than the duration of the first timer of the first communication device, and the second timer of the first communication device is the same as the first timer of the first communication device.
  • the duration of the second timer of a communication device is the same, and n is a positive integer.
  • the method before the second communication device starts the first timer, the method further includes: the second communication device determines that the HARQ feedback attribute corresponding to the first transmission is enabled.
  • the present application provides a communication method that can be applied to a sidelink communication system, such as a car networking system.
  • the system may include a third communication device and a fourth communication device, where the fourth communication device may be used as The transmitting end device (i.e. TX UE) and the third communication device can be used as the receiving end device (i.e. RX UE).
  • TX UE transmitting end device
  • RX UE receiving end device
  • the third communication device configures the duration of the third timer as the first duration, and/or sets the duration of the fourth timer The duration is configured as the second duration; when at least one reserved resource for retransmission of the second transmission does not exist on the side link, the third communication device configures the duration of the third timer as the third duration, and/or Configure the duration of the fourth timer as the fourth duration;
  • the third timer is used to indicate the length of time before the retransmission authorization is received
  • the fourth timer is used to indicate the length of time before the retransmission is received.
  • the third communication device determines the first duration according to the time domain interval between the first resource and the second resource in the at least one reserved resource, and/or, the third communication device determines the first duration according to the time domain received from the third communication device
  • the time difference between the second transmission and the determination of the feedback response information determines the second duration, where the first resource is used to transmit the second transmission, and the second resource is the resource closest to the first resource in the time domain among at least one reserved resource .
  • the above-mentioned second transmission may be TB, MAC PDU, and so on.
  • the third duration is a configured duration
  • the fourth duration is a configured duration
  • the first duration is gap-k; gap is the time domain interval, and k is the time from the third communication device receiving the second transmission from the fourth communication device to determining the feedback response information The time difference between.
  • k is 2 or 3.
  • the third communication device configures the duration of the third timer as the first duration or the third communication device configures the duration of the third timer as the third duration.
  • the method further includes: the third communication device starts a third timer, and/or stops the fourth timer.
  • the second duration is k+s or k-1+s symbols
  • k is the time difference
  • s is the number of symbols contained in one slot.
  • the method further includes: when the third timer expires and/or the third communication device fails to successfully decode the second transmission sent by the fourth communication device, the third communication device Start the fourth timer.
  • the method further includes: The third communication device starts the third timer, and/or stops the fourth timer.
  • the third communication device configures the duration of the third timer according to the time domain interval between the first reserved resource and the second reserved resource among the plurality of reserved resources Before, the method further includes: the third communication device determines that the HARQ feedback attribute corresponding to the second transmission is enabled.
  • the third timer and the fourth timer correspond to the HARQ process corresponding to the second transmission.
  • the method further includes: the third communication device determines, according to the received second control information from the fourth communication device, whether there is a second control information for retransmission on the side link. 2. At least one reserved resource for transmission.
  • the present application provides a communication method that can be applied to a side link communication system, such as an Internet of Vehicles system.
  • the system may include a third communication device and a fourth communication device, where the fourth communication device may be used as The transmitting end device (i.e. TX UE) and the third communication device can be used as the receiving end device (i.e. RX UE).
  • the fourth communication device configures the duration of the third timer as the first duration, and/or configures the duration of the fourth timer as The second duration; when there is no at least one reserved resource for retransmission of the second transmission on the side link, the fourth communication device configures the duration of the third timer to the third duration, and/or sets the fourth The duration of the timer is configured as the fourth duration;
  • the third timer is used to indicate the duration before sending the retransmission authorization
  • the fourth timer is used to indicate the duration before sending the retransmission.
  • the fourth communication device determines the first duration according to the time domain interval between the first resource and the second resource in the at least one reserved resource, and/or, the fourth communication device determines the first duration according to the time domain interval received from the third communication device
  • the time difference between the second transmission and the determination of the feedback response information determines the second duration, where the first resource is used to transmit the second transmission, and the second resource is the resource closest to the first resource in the time domain among at least one reserved resource .
  • the above-mentioned second transmission may be TB, MAC PDU, and so on.
  • the third duration is a configured duration
  • the fourth duration is a configured duration
  • the first duration is gap-k; gap is the time domain interval, and k is the period from the third communication device receiving the second transmission from the fourth device to determining the feedback response information. The time difference between.
  • k is 2 or 3.
  • the second duration is k+s or k-1+s symbols
  • k is the above-mentioned time difference
  • s is the number of symbols contained in a time slot.
  • the fourth communication device configures the duration of the third timer as the first duration or the fourth communication device configures the duration of the third timer as the third duration.
  • the method further includes: after the fourth communication device receives the HARQ feedback from the third communication device, starting a third timer, and/or stopping the fourth timer.
  • the method further includes: when the third timer expires, the fourth communication device starts the fourth timer.
  • the method further Including: the fourth communication device starts the third timer after receiving the HARQ feedback from the third communication device, and/or stops the fourth timer.
  • the fourth communication device starts the third timer after receiving the HARQ feedback from the third communication device, including: the fourth communication device starts the first symbol after receiving the HARQ feedback The third timer.
  • the fourth communication device configures the duration of the third timer according to the time domain interval between the first reserved resource and the second reserved resource among the plurality of reserved resources Before, the method further includes: the fourth communication device determines that the HARQ feedback attribute corresponding to the second transmission is enabled.
  • the third timer and the fourth timer correspond to the HARQ process corresponding to the second transmission.
  • the method further includes: the fourth communication device sends second control information to the third communication device, and the second control information is used to indicate whether there is a side link for retransmission. At least one reserved resource for the second transmission.
  • this application provides a communication method that can be applied to a side-link communication system, such as an Internet of Vehicles system.
  • the system may include a fifth communication device and a sixth communication device, where the sixth communication device may be used as The transmitting end device (i.e. TX UE) and the fifth communication device can be used as the receiving end device (i.e. RX UE).
  • TX UE The transmitting end device
  • RX UE the receiving end device
  • the fifth communication device starts the fifth timing
  • the fifth timer is used to indicate the length of time before the retransmission authorization is received.
  • the fifth communication device may start the fifth timer; or, when the side link When the HARQ feedback attribute of the hybrid automatic repeat request corresponding to the third transmission sent above is disabled, and the fifth communication device does not successfully decode the third transmission, the fifth communication device starts the fifth timer.
  • the above-mentioned third transmission may be TB, MAC PDU, and so on.
  • the method further includes: when the fifth timer expires, the fifth communication device starts a sixth timer, where the sixth timer is used to indicate the duration of receiving the retransmission.
  • the method further includes: when the HARQ feedback attribute corresponding to the third transmission is disabled, the fifth communication device determines that the sixth communication device uses blind retransmission for the third transmission.
  • the fifth communication device determines that the sixth communication device uses blind retransmission for the third transmission, including: the fifth communication device determines the sixth communication device pair according to the received third control information The third transmission adopts blind retransmission, and the third control information is control information corresponding to the third transmission sent by the sixth communication device on the side link.
  • the present application provides a communication method that can be applied to a sidelink communication system, such as an Internet of Vehicles system.
  • the system may include a fifth communication device and a sixth communication device, where the sixth communication device may be used as The transmitting end device (i.e. TX UE) and the fifth communication device can be used as the receiving end device (i.e. RX UE).
  • TX UE The transmitting end device
  • RX UE the receiving end device
  • the HARQ feedback attribute of the hybrid automatic repeat request corresponding to the third transmission sent on the side link is disabled, after the sixth communication device sends the third transmission to the fifth communication device, it delays h symbols to start the fifth timing
  • the fifth timer is used to indicate the length of time before sending retransmission authorization.
  • the above-mentioned third transmission may be TB, MAC PDU, and so on.
  • the method further includes: when the fifth timer expires, the sixth communication device starts a sixth timer, where the sixth timer is used to indicate the duration of sending a retransmission.
  • the method further includes: when the HARQ feedback attribute corresponding to the third transmission is disabled, the sixth communication device determines to use blind retransmission for the third transmission.
  • the present application provides a communication device.
  • the communication device may be a chip or a system on a chip in a first communication device, and may also be used in the first communication device to implement the above-mentioned first aspect or any of its possible implementations.
  • the communication device may include: a processing module, configured to start a first timer and/or stop a second timer when it is determined that there is no reserved resource for retransmission of the first transmission on the side link; or , When it is determined that there is a reserved resource for retransmitting the first transmission on the side link, and/or the resource used for transmitting the first transmission is the first resource in the at least one resource corresponding to the first transmission, Stop the second timer.
  • the second communication device may select at least one resource (for example, 1 to 3 resources) for the first transmission. These resources can be used for the first transmission of the initial transmission, and can also be used for the retransmission of the first transmission.
  • the second communication device may transmit (initial transmission or retransmission) the first transmission to the first communication device on one of the at least one resource. Then, in the time domain, it is located after the resource used to transmit the first transmission.
  • the other resources are reserved resources corresponding to the first transmission.
  • the foregoing first timer is used to indicate the length of time before the retransmission authorization is received, and the second timer is used to indicate the length of time before the retransmission is received.
  • the above-mentioned apparatus may further include: a sending module, configured to send HARQ feedback corresponding to the first transmission to the second communication device on the side link; and a receiving module, configured to Receiving the first transmission sent by the second communication device; correspondingly, the processing module is configured to start the first timer after the sending module sends the HARQ feedback corresponding to the first transmission; or, the first timer after the sending module sends the HARQ feedback Symbols to start the first timer; or, after the receiving module receives the first transmission, the first timer is started.
  • the sending module is used to send HARQ feedback corresponding to the first transmission to the second communication device on the side link, and the processing module is also used to send and the first transmission in the sending module. After transmitting the corresponding HARQ feedback, stop the second timer; or, stop the second timer on the first symbol after the HARQ feedback is sent by the sending module.
  • the processing module is further configured to start the second timer when the first timer expires and/or the first transmission sent by the second communication device is not successfully decoded.
  • the processing module is further configured to determine that the HARQ feedback attribute corresponding to the first transmission is enabled before starting the first timer.
  • the receiving module is configured to receive the first control information from the second communication device; the processing module is configured to determine whether there is a first transmission for retransmission according to the first control information. And/or the resource used to transmit the first transmission is not the first resource in the at least one resource corresponding to the first transmission.
  • the present application provides a communication device.
  • the communication device may be a chip or a system-on-chip in a second communication device, and may also be used in a second communication device to implement the above-mentioned second aspect or any of its possible implementations.
  • the function module of the way method may be a chip or a system-on-chip in a second communication device, and may also be used in a second communication device to implement the above-mentioned second aspect or any of its possible implementations.
  • the communication device may include: a processing module, configured to start a first timer and/or stop a second timer when it is determined that there is no reserved resource for retransmission of the first transmission on the side link, and A timer is used to indicate the length of time before sending the retransmission authorization, and the second timer is used to indicate the time length of sending the retransmission; or, when it is determined that there are reserved resources for retransmission of the first transmission on the side link, and/ Or when the resource used to transmit the first transmission is the first resource in the at least one resource corresponding to the first transmission, the second timer is stopped, and the at least one reserved resource corresponding to the first transmission is performed by performing the resource for the first transmission Choose what you get.
  • a processing module configured to start a first timer and/or stop a second timer when it is determined that there is no reserved resource for retransmission of the first transmission on the side link, and A timer is used to indicate the length of time before sending the retransmission authorization, and the second time
  • the processing module is further configured to start the second timer when the first timer expires.
  • the above-mentioned apparatus further includes: a receiving module and a sending module, configured to receive HARQ feedback corresponding to the second transmission sent by the first communication device; and a processing module, configured in the receiving module After receiving the HARQ feedback, start the first timer; or, the sending module, for sending the first transmission to the first communication device on the side link; the processing module, for sending the first transmission after the sending module, Delay m symbols to start the first timer, where m is a positive integer; or, after the sending module sends the first transmission, start the first timer.
  • the foregoing apparatus further includes: a sending module, configured to send the first transmission to the first communication device on the side link; and a processing module, configured to send the first transmission in the sending module After transmission, stop the second timer.
  • the processing module is further configured to determine that the HARQ feedback attribute corresponding to the first transmission is enabled before starting the first timer.
  • the present application provides a communication device.
  • the communication device may be a chip or a system on a chip in a third communication device, and may also be used in a third communication device to implement the above-mentioned third aspect or any of its possible implementations.
  • the function module of the way method may be a chip or a system on a chip in a third communication device, and may also be used in a third communication device to implement the above-mentioned third aspect or any of its possible implementations.
  • the communication device may include: a processing module, configured to configure the duration of the third timer as the first duration when there is at least one reserved resource for retransmission of the second transmission on the side link, and/or configure The duration of the fourth timer is configured as the second duration; when there is no at least one reserved resource for retransmission of the second transmission on the side link, the third communication device configures the duration of the third timer as the third Duration, and/or configure the duration of the fourth timer to the fourth duration;
  • the third timer is used to indicate the length of time before the retransmission authorization is received
  • the fourth timer is used to indicate the length of time before the retransmission is received.
  • the processing module is configured to determine the first time length according to the time domain interval between the first resource and the second resource in the at least one reserved resource, and/or the processing module is configured to determine the first duration according to the third communication device
  • the time difference between receiving the second transmission and determining the feedback response information determines the second duration, where the first resource is used to transmit the second transmission, and the second resource is at least one reserved resource that is closest to the first resource in the time domain H.
  • the above-mentioned second transmission may be TB, MAC PDU, and so on.
  • the third duration is a configured duration
  • the fourth duration is a configured duration
  • the first duration is gap-k; gap is the time domain interval, and k is the time from the third communication device receiving the second transmission from the fourth communication device to determining the feedback response information The time difference between.
  • k is 2 or 3.
  • the processing module is further configured to configure the duration of the third timer to the third duration and/or configure the duration of the fourth timer to the fourth duration, Start the third timer, and/or stop the fourth timer.
  • the second duration is k+s or k-1+s symbols
  • k is the time difference
  • s is the number of symbols contained in one time slot.
  • the processing module is further configured to configure the duration of the fourth timer to the second duration and/or configure the duration of the fourth timer to the fourth duration, Start the fourth timer.
  • the processing module is further configured to start the fourth timer when the third timer expires and/or the second transmission is not successfully decoded.
  • the processing module is configured to start the third timer when the third duration is determined as configured, and/or after the fourth duration is determined as the configured duration, and / Or stop the fourth timer.
  • the sending module is also used to send HARQ feedback corresponding to the second transmission to the fourth communication device on the side link; the processing module is also used to send the second transmission in the sending module After transmitting the corresponding HARQ feedback, the third timer is started.
  • the processing module is further configured to start the third timer at the first symbol after the HARQ feedback corresponding to the second transmission is sent by the sending module.
  • the processing module is further configured to determine that the HARQ feedback attribute corresponding to the second transmission is enabled before the duration of the third timer is configured.
  • the apparatus further includes: a receiving module, configured to receive the second control information from the fourth communication device; and a processing module, configured to determine the side according to the second control information Whether there is at least one reserved resource for retransmission of the second transmission on the uplink.
  • the present application provides a communication device.
  • the communication device may be a chip or a system on a chip in a fourth communication device, and may also be a fourth communication device for implementing the fourth aspect or any possible implementation thereof.
  • the communication device may include: a sending module for transmitting the second transmission on the side link; a processing module for when there are multiple reserved resources for transmitting the second transmission on the side link , Configure the duration of the third timer as the first duration, and/or configure the duration of the fourth timer as the second duration; or, the processing module is used for when there is no second duration on the side link for retransmission 2.
  • the duration of the third timer is configured as the third duration
  • the duration of the fourth timer is configured as the fourth duration;
  • the third timer is used to indicate the duration before sending the retransmission authorization
  • the fourth timer is used to indicate the duration before sending the retransmission.
  • the processing module is configured to determine the first time length according to the time domain interval between the first resource and the second resource in the at least one reserved resource, and/or the processing module is configured to determine the first duration according to the third communication device
  • the time difference between receiving the second transmission and determining the feedback response information determines the second duration, where the first resource is used to transmit the second transmission, and the second resource is at least one reserved resource that is closest to the first resource in the time domain H.
  • the above-mentioned second transmission may be TB, MAC PDU, and so on.
  • the third duration is a configured duration
  • the fourth duration is a configured duration
  • the first duration is gap-k; gap is the time domain interval, and k is the period from the third communication device receiving the second transmission from the fourth device to determining the feedback response information. The time difference between.
  • k is 2 or 3.
  • the second duration is k+s or k-1+s symbols
  • k is the time difference
  • s is the number of symbols contained in one time slot.
  • the above-mentioned apparatus further includes: a receiving module, configured to receive the HARQ feedback processing module corresponding to the second transmission sent by the third communication device; When there is a reserved resource for retransmission of the second transmission on the uplink, the third timer is started after the receiving module receives the HARQ feedback, and/or the fourth timer is stopped.
  • the processing module is further configured to start the fourth timer when the third timer expires.
  • the receiving module is configured to receive the HARQ feedback corresponding to the second transmission sent by the third communication device; the processing module is also configured to configure the duration of the third timer as the first Three durations, and/or after the duration of the fourth timer is configured to the fourth duration, the third timer is started after receiving the HARQ feedback corresponding to the second transmission from the third communication device, and/or the fourth timer is stopped .
  • the processing module is configured to start the third timer at the first symbol after the HARQ feedback corresponding to the second transmission is received by the receiving module.
  • the processing module is further configured to determine that the HARQ feedback attribute corresponding to the second transmission is enabled before the duration of the third timer is configured.
  • the sending module is further configured to send second control information to the third communication device, and the second control information is used to indicate whether there is a second control information for retransmission on the side link. At least one reserved resource for transmission.
  • the present application provides a communication device.
  • the communication device may be a chip or a system-on-chip in a fifth communication device, and may also be a fifth communication device used to implement the fifth aspect or any one of its possibilities.
  • the communication device may include: a receiving module for receiving the third transmission sent by the sixth communication device on the side link; a processing module for determining that the HARQ feedback attribute corresponding to the third transmission is disabled, and/ Or when the third transmission is not successfully decoded, the fifth timer is started, and the fifth timer is used to indicate the length of time before the retransmission authorization is received.
  • the processing module is configured to start a sixth timer when the fifth timer expires, and the sixth timer is used to indicate the duration of receiving the retransmission.
  • the processing module is configured to determine that the sixth communication device adopts blind retransmission for the third transmission when it is determined that the HARQ feedback attribute corresponding to the third transmission is disabled.
  • the receiving module is configured to receive the third control information sent by the sixth communication device; the processing module is configured to determine the sixth communication device pair according to the received third control information.
  • the third transmission adopts blind retransmission, and the third control information is control information corresponding to the third transmission sent by the sixth communication device on the side link.
  • the present application provides a communication device.
  • the communication device may be a chip or a system-on-chip in a sixth communication device, and may also be a sixth communication device used to implement the sixth aspect or any one of its possibilities.
  • the communication device may include: a sending module for sending the third transmission to the fifth communication device on the side link; a processing module for sending the third transmission to the After the fifth communication device sends the third transmission, it delays h symbols to start the fifth timer, and the fifth timer is used to indicate the length of time before sending the retransmission authorization.
  • the processing module is further configured to: when the fifth timer expires, the sixth communication device starts a sixth timer, and the sixth timer is used to indicate the duration of sending a retransmission.
  • the processing module is further configured to determine to adopt blind retransmission for the third transmission when it is determined that the HARQ feedback attribute corresponding to the third transmission is disabled.
  • the present application provides a communication device, including: a processor, a memory, and a communication interface; the processor is coupled to the memory, and the processor is configured to read and execute instructions in the memory to implement the first aspect, The communication method described in the third aspect, the fifth aspect, and any one of the possible implementation manners thereof; the communication interface is configured to communicate with the second communication device, the fourth communication device embodiment, or the sixth communication device.
  • the present application provides a communication device, including: a processor, a memory, and a communication interface; the processor is coupled to the memory, and the processor is configured to read and execute instructions in the memory to implement the second aspect, The communication method described in the fourth aspect, the sixth aspect, and any one of the possible implementation manners thereof; the communication interface is configured to communicate with the first communication device, the third communication device embodiment, or the fifth communication device.
  • the present application provides a computer-readable storage medium, which stores instructions, and when the instructions are run on a computer, they are used to execute the above-mentioned first to sixth aspects and any of them The communication method described in the possible implementation manner.
  • this application provides a computer program or computer program product.
  • the computer program or computer program product is executed on a computer, the computer realizes the above-mentioned first to sixth aspects and any of the possible The communication method described in the implementation mode.
  • FIG. 1 is a schematic diagram of an architecture of a communication system in an embodiment of this application.
  • FIG. 2 is a schematic diagram of another architecture in an embodiment of the application.
  • FIG. 3 is a schematic diagram of at least one resource corresponding to one transmission in an embodiment of the application
  • FIG. 4 is a schematic flowchart of a communication method on the side of a first communication device in an embodiment of this application;
  • FIG. 5 is a schematic flowchart of a second communication device-side communication method in an embodiment of this application.
  • FIG. 6 is a schematic flowchart of a third communication device-side communication method in an embodiment of this application.
  • FIG. 7 is a schematic flowchart of a fourth communication device-side communication method in an embodiment of this application.
  • FIG. 8 is a schematic flowchart of a fifth communication device-side communication method in an embodiment of this application.
  • FIG. 9 is a schematic flowchart of a sixth communication device-side communication method in an embodiment of this application.
  • FIG. 10 is a schematic diagram of a structure of a communication device in an embodiment of this application.
  • FIG. 11 is a schematic diagram of another structure of a communication device in an embodiment of this application.
  • the corresponding device may include one or more units such as functional units to perform the described one or more method steps (for example, one unit performs one or more steps). , Or multiple units, each of which performs one or more of multiple steps), even if such one or more units are not explicitly described or illustrated in the drawings.
  • the corresponding method may include one step to perform the functionality of one or more units (for example, one step performs one or more units). The functionality, or multiple steps, each of which performs the functionality of one or more of the multiple units), even if such one or more steps are not explicitly described or illustrated in the drawings.
  • the new radio (NR) system is the current mainstream wireless communication technology. It aims to support V2X with lower latency and higher reliability in response to the characteristics of the vehicle to everything (V2X) service and new service transmission requirements. Communication.
  • the receiving end user equipment (RX UE) will always monitor the PSCCH and/or PSSCH to check whether there is any (TX UE) information from and the sending end user equipment.
  • TX UE the receiving end user equipment
  • the RX UE is not always interacting with the TX UE for effective information, nor does it always perform upload or download services, and there is no data transmission even during communication. Then, when there is no data exchange between the receiving and transmitting UEs, if the RX UE continues to monitor the PPSCCH and/or PSSCH, the power consumption of the RX UE will increase.
  • FIG. 1 is a schematic diagram of an architecture of a communication system in an embodiment of the application.
  • the communication system 10 may include: a network side device 11 and a communication device 12.
  • FIG. 2 is a schematic diagram of another architecture in an embodiment of this application. As shown in FIG. 2, the communication system 10 may further include a plurality of communication devices 12.
  • the type and number of network elements included in the communication system, and the connection relationship between the network elements are not limited to this.
  • the communication device while the communication device communicates with the network side device, it can also communicate with other communication devices.
  • the network side device can perform resource configuration, scheduling, coordination, etc. on the sidelink of the communication between the communication devices, assisting the direct communication between the communication devices.
  • the communication device may also perform resource configuration, scheduling, coordination, etc., on the side links of communication between other communication devices by itself, which is not specifically limited in the embodiment of the present application.
  • the above-mentioned network-side device may be a device used on the access network side to support the terminal's access to the wireless communication system, for example, it may be the next generation NodeB (gNB), transmission and reception point (transmission and reception point) in the 5G access technology communication system.
  • gNB next generation NodeB
  • the above-mentioned communication device may be a device that provides voice or data connectivity to users, for example, it may also be called UE, mobile station, subscriber unit, station (STAtion), or terminal (TE, Terminal Equipment). )Wait.
  • the communication device can be a cellular phone, a personal digital assistant (PDA, Personal Digital Assistant), a wireless modem (modem), a handheld device (handheld), a laptop computer, a cordless phone, Wireless Local Loop (WLL, Wireless Local Loop) station or tablet computer (pad), etc.
  • PDA Personal Digital Assistant
  • WLL Wireless Local Loop
  • WLL Wireless Local Loop
  • terminals in smart transportation, cars or RSUs household equipment in smart homes, power meter reading equipment in smart grids, voltage monitoring equipment, environmental monitoring equipment, video monitoring equipment in smart security networks, cash registers, etc.
  • the communication equipment can be statically fixed or mobile.
  • network-side equipment such as a base station, configures a resource pool for UE's SL communication, and a resource pool is a collection of time-frequency resources.
  • the resources for the UE to communicate on the SL link are determined from a pre-configured or a resource pool configured on the base station side.
  • there are two modes for the Tx UE to obtain the transmission resources for communication on the SL link from the network side device namely mode1 and mode2.
  • the foregoing pre-configured resources may be obtained from a network element of the core network, or may be preset in the UE.
  • the base station allocates SL transmission resources for Tx UE through scheduling.
  • the Tx UE when the Tx UE has SL to transmit data, it reports the SL buffer status report (buffer status report, BSR) MAC CE to the base station through the Uu port to inform the base station of the current Tx UE's data to be transmitted on the PC5 port. quantity.
  • the base station can dynamically allocate transmission resources for the Tx UE.
  • the UE selects transmission resources from the resource pool pre-configured or configured by the base station as needed, without the base station for scheduling.
  • the SL resource determined by the UE is configured by the base station (for example, configured through RRC signaling or system information block (system information block, SIB) configuration), or pre-configured.
  • the pre-configuration mentioned here may be obtained from the network element of the core network, or may be preset in the UE.
  • the TX UE performs a resource selection, and selects at least one resource (usually 1 to 3 resources) for a transmission, such as a TB, a MAC PDU, etc., and at least one resource is used for new transmission or retransmission The transmission.
  • the TX UE can select a certain resource among at least one resource to send the transmission.
  • the resource currently sending the transmission is the current transmission resource, and in the time domain, the resource located after the current transmission resource is the reserved resource, which is reserved Resources are the resources reserved for retransmitting the transmission.
  • FIG. 3 is a schematic diagram of at least one resource corresponding to a transmission in an embodiment of this application. As shown in FIG. 3, the TX UE selects 3 resources for one transmission, namely S1, S2, and S3. If the TX UE Send the transmission on S1, then S1 is the current transmission resource, and S2 and S2 are the two reserved resources corresponding to the transmission.
  • the first communication device after the first communication device receives the first transmission on a resource corresponding to the first transmission, the first communication device needs to determine whether there is a reservation for retransmitting the first transmission on the side link resource. Then, the first communication device can perform the following steps.
  • FIG. 4 is a schematic flowchart of a first communication device-side communication method in an embodiment of this application. As shown in FIG. 4, the method includes:
  • S401 The second communication device sends the first transmission to the first communication device
  • the second communication device sends the first transmission on the first resource among at least one resource selected for the first transmission.
  • the second communication device may initially transmit the first transmission or retransmit the first transmission.
  • the first transmission may be one TB, one MAC PDU, of course, it may also be other, which is not specifically limited in the embodiment of the present application.
  • S402 The first communication device judges whether there is a reserved resource for retransmission of the first transmission on the side link; if not, execute S403, if yes, execute S404;
  • the first communication device After the first communication device (RX UE) receives the first transmission (which can be understood as just receiving or completing the reception) on the receiving first resource, it determines whether there is at least one pre-transmission for retransmitting the first transmission after the first resource. Reserve resources, that is, determine whether there are reserved resources for retransmission of the first transmission on the side link. If there is at least one reserved resource after the first resource, the first communication device may determine that there is a reserved resource for retransmitting the first transmission on the side link, and then perform S104; otherwise, the first communication The device may confirm that there is no reserved resource for retransmission of the first transmission on the side link, and then execute S103.
  • Reserve resources that is, determine whether there are reserved resources for retransmission of the first transmission on the side link. If there is at least one reserved resource after the first resource, the first communication device may determine that there is a reserved resource for retransmitting the first transmission on the side link, and then perform S104; otherwise, the first communication The device
  • the second communication device may also send the first control information to the first communication device.
  • the first control information is used to indicate the resource location of at least one resource corresponding to the first transmission. Then, after the first communication device receives the first control information, it can determine whether it is in the first resource according to the instructions of the first control information. Afterwards, whether there is at least one reserved resource, that is, it is judged whether there is a reserved resource for retransmitting the first transmission on the side link.
  • the above-mentioned first control information may be SCI. Then, the first communication device may determine whether there is a reserved resource for retransmitting the first transmission on the side link according to the instruction of the SCI.
  • the first control information may also be other information, which is not specifically limited in the embodiment of the present application.
  • the first communication device may determine whether there is a resource for retransmitting the first transmission on the side link by determining whether the resource used to receive the first transmission is the last resource in the at least one resource.
  • Reserve resources For example, still referring to Figure 3, assuming that the first communication device receives the first transmission on S3, then the first communication device can determine that S3 is the last resource among the three resources S1 to S3, and after S3 is There is no resource for retransmission of the first transmission, that is, there is no reserved resource for retransmission of the first transmission on the side link, on the contrary, there is no resource for retransmission of the first transmission on the side link Reserved resources.
  • the resource used to transmit the first transmission is the last resource in the at least one resource, it indicates that there is no reserved resource for retransmitting the first transmission on the side link, otherwise, it indicates that There are reserved resources on the side link for retransmission of the first transmission.
  • the first communication device may also determine whether there is a first resource for retransmission on the side link by determining whether the resource used for receiving the first transmission is the first resource in the at least one resource.
  • a reserved resource for transmission For example, still referring to Figure 3, assuming that the first communication device receives the first transmission on S1, then the first communication device can determine that S1 is the first resource among the three resources S1 to S3, after S1 There are resources for retransmission of the first transmission, such as S2 and S3, that is, there are reserved resources for retransmission of the first transmission on the side link. On the contrary, there is no resource for retransmission on the side link. Pass the reserved resources for the first transmission.
  • the resource used to receive the first transmission is the first resource in the at least one resource, it indicates that there is a reserved resource for retransmitting the first transmission on the side link; otherwise, it indicates that There is no reserved resource for retransmission of the first transmission on the side link.
  • S403 The first communication device starts the first timer, and/or stops the second timer;
  • the first communication device determines that there is no reserved resource for retransmission of the first transmission on the side link, and/or the resource for receiving the first transmission is the last resource among the at least one resource
  • the first The communication device starts the first timer.
  • the first communication device may also stop the second timer while starting the first timer, or may start the first timer and the second timer separately at different time points.
  • the first timer described in the embodiment of this application is used to indicate the length of time before the retransmission authorization is received.
  • the first timer is used to indicate the minimum length of time before the communication device receives the retransmission authorization. It is understood as the minimum value of the time that the communication device expects to wait before receiving the retransmission authorization;
  • the second timer is used to indicate the duration of receiving the retransmission, for example, the second timer is used to indicate the maximum duration of the communication device receiving the retransmission, It can be understood that the communication device expects to receive the maximum value of the listening time for retransmission.
  • the first timer and the second timer correspond to the HARQ process corresponding to the first transmission, that is, the first communication device starts the first timer for the HARQ process corresponding to the first transmission, and/or stops The second timer.
  • the timer duration configuration is the same, that is, the first timer of the first communication device is the same as that of the second communication device.
  • the duration of the first timer is the same, and the duration of the second timer of the first communication device is the same as that of the second timer of the second communication device; of course, considering that the first communication device needs to perform analysis after receiving the first transmission, N symbols may be required.
  • the duration of the first timer of the second communication device may be n symbols longer than the duration of the first timer of the first communication device, and the second timer of the first communication device communicates with the second communication device.
  • the duration of the second timer of the device is the same, and n is a positive integer; of course, the duration of the second timer of the second communication device can also be n symbols longer than the duration of the second timer of the first communication device.
  • the first timer of the device has the same duration as the first timer of the second communication device, and n is a positive integer.
  • the first timer may be drx-sl-HARQ-RTT-Timer
  • the second timer may be drx-sl-Retransmission-Timer
  • the first timer and the second timer may also be other timers, which are not specifically limited in the embodiment of the present application.
  • S404 The first communication device stops the second timer.
  • the first communication device determines that there is a reserved resource for retransmitting the first transmission on the side link, and/or the resource for receiving the first transmission is the first resource among the at least one resources, the first The communication device stops the second timer, so that the first communication device does not need to monitor the SCI associated with the HARQ process corresponding to the first transmission, thereby saving power consumption.
  • the first communication device when performing S403, may also first send the HARQ feedback corresponding to the first transmission to the second communication device, that is, the HARQ feedback corresponding to the first transmission, and then after the HARQ feedback is sent , Start the first timer, and/or stop the second timer.
  • the first communication device may start the first timer and/or stop the second timer immediately after sending the HARQ feedback; the first communication device may also start the first timer at the first symbol after sending the HARQ feedback.
  • a timer may also start the timer at the qth symbol after sending the HARQ feedback, where q is a positive integer, which is not specifically limited in the embodiment of the present application.
  • the first communication device needs to send the HARQ feedback corresponding to the first transmission to the second communication device. Then, the first communication device must first determine whether the HARQ feedback attribute corresponding to the first transmission is enabled. ), only if the HARQ feedback attribute corresponding to the first transmission is enable, the first communication device can perform HARQ feedback on the first transmission.
  • the HARQ feedback attribute is configured for the LCH, and the HARQ feedback attribute is used to indicate whether the LHC supports HARQ feedback. Only LCHs with the same HARQ feedback attribute can be encapsulated in one transmission. Then, the HARQ feedback attribute corresponding to the first transmission refers to the HARQ feedback attribute of the LCH encapsulated in the first transmission.
  • the first communication device may perform S405 after performing S403 or S404: when the first timer expires, if the first transmission is not successfully decoded, the first communication device starts the second timer and monitors the first The SCI associated with the corresponding HARQ process is transmitted, and the first transmission is retransmitted.
  • the first communication device may not always monitor the SCI associated with the HARQ process corresponding to the first transmission, but based on the resource location indicated by the first control information, The retransmission of the first transmission is received on the corresponding resource to save power consumption.
  • the second communication device may also perform the following steps.
  • FIG. 5 is a schematic flowchart of a second communication device-side communication method in an embodiment of this application. As shown in FIG. 5, the method may include:
  • S501 The second communication device judges whether there is a reserved resource for retransmission of the first transmission on the side link; if not, execute S502, if yes, execute S503;
  • the second communication device When the second communication device needs to send the first transmission to the first communication device, or has already sent the first transmission to the first communication device, the second communication device determines that it is on the side line according to at least one resource selected or reselected for the first communication device. Whether there are reserved resources for retransmission of the first transmission on the link. If there is no reserved resource for retransmission of the first transmission, perform S502, otherwise perform S503.
  • S502 The second communication device starts the first timer, and/or stops the second timer;
  • S503 The second communication device stops the second timer.
  • the first timer is used to indicate the length of time before the retransmission authorization is sent
  • the second timer is used to indicate the length of time before the retransmission is sent.
  • the second communication device determines that there is a reserved resource for retransmitting the first transmission on the side link, and/or the resource for sending the first transmission is the first resource among the at least one resource, the second The communication device stops the second timer and does not need to monitor the SCI associated with the HARQ process corresponding to the first transmission, thereby saving power consumption.
  • the second communication device may also first send the first transmission to the first communication device when performing S502, and then after the first transmission is sent, start the first timer, and/or stop the second timing Device.
  • the second communication device may also start the first timer and/or stop the second timer after receiving the HARQ feedback sent by the first communication device.
  • the above S502 may include: the second communication device starts the first timer after receiving the HARQ feedback from the first communication device; or, when the first communication device does not feed back ACK or NACK to the second communication (that is, there is no HARQ, or when HARQ is not enabled), considering that the first communication device still needs to analyze the first transmission, m symbols may be required. Therefore, after sending the first transmission, the second communication device delays m symbols to start the first transmission.
  • a timer, where m may be the same as or different from n in the foregoing embodiment; or, the second communication device starts the first timer after sending the first transmission.
  • the delay can be understood as the second communication device waits for m symbols and then starts the first timer after sending the first transmission.
  • the first communication device may also perform S504: when the first timer expires, the second communication device starts a second timer, monitors PSCCH and/or PSSCH, and waits for the retransmission of the first transmission. pass.
  • the second communication device needs to first determine the HARQ corresponding to the first transmission.
  • the feedback attribute is enabled.
  • the second communication device selects 3 resources for the first transmission during a resource selection, namely S1, S2, and S3, where S1 can be used for the first transmission.
  • the resources of may also be resources used to retransmit the first transmission, and S2 and S3 may be resources used to retransmit the first transmission. If the second communication device sends the first transmission (retransmission) to the first communication device on S3, at this time, since S3 is the last resource among the three resources, then the first communication device and the second communication device can determine There is no reserved resource for the first transmission of retransmission on the side link.
  • the first communication device and the second communication device may start the first timer and/or stop the second timer, so that the first A communication device may not always monitor the SCI associated with the HARQ process corresponding to the first transmission, thereby saving power consumption.
  • the second communication device sends the first transmission to the first communication device on S1 (either the initial transmission or the retransmission), at this time, since S1 is the first resource among the three resources, then the first transmission A communication device and a second communication device may determine that there are reserved resources for the first transmission for retransmission on the side link, such as S2 and/or S3, and then the first communication device and the second communication device The second timer can be stopped, so that the first communication device does not need to monitor the SCI associated with the HARQ process corresponding to the first transmission all the time, saving power consumption.
  • the first communication device and the second communication device jointly control the data reception of the first communication device through the first timer and the second timer, so that the first communication device may not use Always monitor the SCI associated with the HARQ process corresponding to the first transmission to save power consumption.
  • FIG. 6 is a schematic flowchart of a third communication device-side communication method in an embodiment of this application. As shown in FIG. 6, the method may include:
  • the second control information is used to indicate the position on the side link of at least one resource corresponding to the second transmission, thereby indicating whether there is at least one reserved resource for retransmission of the second transmission on the side link .
  • the second control information may be SCI.
  • the foregoing second transmission may be TB, MAC PDU, PSSCH, and so on.
  • the third communication device determines whether there is at least one reserved resource for retransmission of the second transmission on the side link according to the second control information, if yes, execute S603, if not, execute S604;
  • the third communication device configures the duration of the third timer as the first duration, and/or configures the duration of the fourth timer as the second duration;
  • the third communication device may determine the third time length according to the time domain interval between the first resource and the second resource; and/or, the third communication device may determine whether the second transmission is received according to the third communication device.
  • the time difference between the feedback response information determines the second duration.
  • the first resource is the resource currently used for transmitting the second transmission, which may be used for the first transmission of the second transmission, or may be used for the retransmission of the second transmission;
  • the second resource For at least one reserved resource, the resource closest to the first resource in the time domain, and the second resource is used for retransmission of the second transmission.
  • the duration of the third timer can be determined as gap-k, where gap is the time domain interval, and k is the third communication device received from the fourth communication device.
  • gap is the time domain interval
  • k is the third communication device received from the fourth communication device.
  • k is the upper limit of the above-mentioned time difference, which can be 2 or 3.
  • k can also take other values, which are not specifically limited in the embodiment of the present application.
  • the duration of the fourth timer may be determined as k+s or k-1+s symbols.
  • k is the time difference between the third communication device receiving the second transmission and determining the feedback response information
  • s is the number of symbols contained in a time slot configured by the current SCS, such as 14 symbols.
  • the third timer in this embodiment of the application has the same meaning as the first timer.
  • the fourth timer has the same meaning as the second timer.
  • the foregoing method may further include: the third communication device starts the third timer and/or stops the fourth timer.
  • the step of starting the third timer by the third communication device may include: the third communication device immediately starts the third timer after sending the HARQ feedback corresponding to the second transmission to the fourth communication device , Or, the third communication device starts the third timer at the first symbol after sending the HARQ feedback corresponding to the second transmission to the fourth communication device, or the third communication device may also configure the duration of the third timer Then the third timer is started, or the third communication device starts the third timer after receiving the second transmission. Of course, there may be other ways to start the third timer. The process of starting the third timer by the third communication device will not be repeated in the following embodiments.
  • the third communication device may also start the fourth timer. For example, when the third timer expires and/or the third communication device does not successfully decode the second transmission sent by the fourth communication device, the third communication device starts the fourth timer.
  • S604 may be performed: the third communication device sets the first The three timers are configured as the third duration, and/or the third communication device configures the fourth timer as the fourth duration;
  • the third communication device configures the duration of the third timer and/or the duration of the fourth timer as the configured duration.
  • the value of the first duration and the value of the third duration may be the same or different; the value of the second duration and the value of the fourth duration may be the same or different, which is not specifically limited in the embodiment of the present application.
  • the configured duration refers to the duration configured for the third timer and the fourth timer during the communication between the third communication device and the fourth communication device. That is to say, if there is no reserved resource for retransmission of the second transmission on the side link, the third communication device cannot configure the duration of the third timer and the fourth timer in the above manner, but instead The configured duration is used to configure the duration for the third timer and/or the fourth timer.
  • the third communication device may start the third timer and/or stop the fourth timer. Timer.
  • the third communication device may start the third timer after sending the HARQ feedback corresponding to the second transmission to the fourth communication device.
  • the third communication device determines that the HARQ feedback attribute corresponding to the second transmission is enabled.
  • the second communication device may also perform the following steps.
  • FIG. 7 is a schematic flowchart of a fourth communication device-side communication method in an embodiment of this application. Referring to FIG. 7, the method may include:
  • the second control information is used to indicate the position on the side link of at least one resource corresponding to the second transmission.
  • the second control information may be SCI.
  • S702 The fourth communication device judges whether there is at least one reserved resource for retransmission of the second transmission on the side link, if yes, execute S703, if not, execute S704;
  • the fourth communication device configures the duration of the third timer according to the time domain interval between the first resource and the second resource in the plurality of reserved resources.
  • S705 may also be executed: the fourth communication device configures the duration of the fourth timer according to the time difference between the third communication device receiving the second transmission from the fourth device and determining the feedback response information.
  • the time difference between the third communication device receiving the second transmission from the fourth device and determining the feedback response information may be notified to the fourth communication device by the third communication device, or the third communication device and the fourth communication device may be notified in advance.
  • the fourth communication device may also start the third communication device after receiving the HARQ feedback corresponding to the second transmission sent by the third communication device. Timer, and/or stop the fourth timer.
  • the step of starting the third timer by the fourth communication device may include that the fourth communication device receives the HARQ feedback corresponding to the second transmission sent by the third communication device.
  • the third timer is started immediately, or the fourth communication device starts the third timing at the first symbol after receiving the HARQ feedback corresponding to the second transmission. It will not be repeated in the following embodiments.
  • the fourth communication device starts the fourth timer.
  • the fourth communication device configures the duration of the third timer and/or the duration of the fourth timer as the configured duration.
  • process of configuring the third timer and the fourth timer by the fourth communication device may refer to the process of configuring the third timer and the fourth timer by the third communication device in the foregoing embodiment, and details are not repeated here.
  • the fourth communication device after the fourth communication device is configured with the third timer and the fourth timer, these two timers can be used. Then, the fourth communication device can receive the communication from the third communication device. After HARQ feedback, the third timer is started, and/or the fourth timer is stopped.
  • the fourth communication device selects 3 resources for the second transmission in one resource selection, namely S1, S2, and S3, where S1 can be used for the first transmission of the second transmission.
  • the transmission resource may also be the resource used to retransmit the second transmission, and S2 and S3 may be the resource used to retransmit the second transmission.
  • the third communication device and the fourth communication device can It is determined that there is a reserved resource for the second transmission of retransmission on the side link, and then the third communication device and the fourth communication device can select the time interval between S2 and the resource S3 closest to S2 to configure the second transmission.
  • the duration of the three timers, and/or, the third communication device configures the fourth timer from receiving the second transmission from the fourth device to determining the time difference between the feedback response information, and the third timer and the fourth timer After the configuration is completed, the third communication device and the fourth communication device can start the third timer and/or stop the fourth timer.
  • the third communication device does not need to monitor the SCI associated with the HARQ process corresponding to the second transmission. , Save power consumption.
  • the fourth communication device sends the second transmission (retransmission) to the third communication device on S3, at this time, since S3 is the last resource among the three resources, then the third communication device and the fourth communication device can It is determined that there is no reserved resource for the retransmission of the first transmission on the side link. Then, the third communication device and the fourth communication device can stop the second timer. At this time, the third communication device does not need to monitor the first transmission. Second, the SCI associated with the corresponding HARQ process is transmitted to save power consumption.
  • the third communication device and the fourth communication device jointly control the data reception of the third communication device through the third timer and the fourth timer, so that the third communication device may not use Always monitor the SCISCI associated with the HARQ process corresponding to the second transmission to save power consumption.
  • FIG. 8 is a schematic flowchart of a fifth communication device-side communication method in an embodiment of the present application. As shown in FIG. 8, the method may include:
  • the sixth communication device sends the third transmission to the fifth communication device
  • the sixth communication device when it initially transmits the third transmission, it may also send a third control message to the fifth communication device, and the third control message may be an SCI.
  • the third control message may be used to indicate whether the sixth communication device adopts blind retransmission for the third transmission.
  • the fifth communication device determines whether the HARQ feedback attribute corresponding to the third transmission sent on the side link is disabled, and if so, executes S803. At this time, the fifth communication device does not know the position of the blind retransmission in advance ;
  • the fifth communication device in addition to determining whether the HARQ feedback attribute corresponding to the short third transmission is disabled, can also determine whether the fifth communication device successfully decodes the third transmission. If the HARQ feedback attribute is non-enabled If enabled, and the fifth communication device fails to decode the third transmission successfully, perform S803. At this time, the fifth communication device does not perform HARQ feedback to the sixth communication device, and the sixth communication device can perform blind retransmission of the third transmission .
  • the sixth communication device may also perform the following steps corresponding to the foregoing process.
  • FIG. 9 is a schematic flowchart of the sixth communication device-side communication method in an embodiment of the present application. As shown in FIG. 9, the method may include:
  • the sixth communication device sends the third transmission to the fifth communication device
  • the sixth communication device when it initially transmits the third transmission, it may also send a third control message to the sixth communication device, and the third control message may be an SCI.
  • the third control message may be used to indicate whether the sixth communication device adopts blind retransmission for the third transmission.
  • S902 The sixth communication device judges whether the HARQ feedback attribute corresponding to the third transmission sent on the side link is disabled, and if so, performs S903;
  • the sixth communication device can perform blind retransmission on the third transmission.
  • the sixth communication device when the sixth communication device determines that the HARQ feedback attribute corresponding to the third transmission sent on the side link is disabled, the sixth communication device sends the third transmission to the fifth communication device.
  • the delay can be understood as the second communication device waiting for m symbols to start the first timer after sending the first transmission, thereby avoiding the risk of missed retransmissions.
  • the foregoing method further includes: when the fifth timer expires, the sixth communication device starts the sixth timer.
  • the second transmission and the third transmission may refer to the description of the first transmission in one or more embodiments.
  • the first communication device, the third communication device, and the fifth communication device are used as transmitting end devices, and the second communication device, the fourth communication device, and the sixth communication device are used as receiving end devices.
  • the embodiment of the sending end device and the embodiment of the receiving end device may refer to each other, which is not specifically limited in the embodiment of the present application.
  • the communication device may be a chip or a system-on-chip in a first communication device, and may also be a first communication device for implementing any of the foregoing embodiments.
  • the chip or system-on-chip includes a memory, and instructions are stored in the memory. When the instructions are called by the system-on-chip or the chip, the foregoing method is executed.
  • FIG. 10 is a schematic structural diagram of a communication device in an embodiment of the application. As shown in FIG.
  • the communication device 1000 may include: a processing module 1001, which is used for retransmission when it is determined that there is no retransmission on the side link When the reserved resource for the first transmission is started, the first timer is started, and/or the second timer is stopped; or, when it is determined that there is a reserved resource for retransmission of the first transmission on the side link, and/or When the resource used for transmitting the first transmission is the first resource in the at least one resource corresponding to the first transmission, the second timer is stopped.
  • the foregoing first timer is used to indicate the length of time before the retransmission authorization is received, and the second timer is used to indicate the length of time before the retransmission is received.
  • the foregoing apparatus 1000 may further include: a sending module 1002, configured to send HARQ feedback corresponding to the first transmission to the second communication device on the side link; and a receiving module 1003, configured to receive the first transmission 2.
  • the first transmission sent by the communication device; correspondingly, the processing module is configured to start the first timer after the sending module sends the HARQ feedback corresponding to the first transmission; or, the first symbol after the sending module sends the HARQ feedback Start the first timer.
  • the sending module is used to send HARQ feedback corresponding to the first transmission to the second communication device on the side link
  • the processing module is also used to send HARQ feedback corresponding to the first transmission in the sending module. Stop the second timer after the feedback; or stop the second timer on the first symbol after the HARQ feedback is sent by the sending module; or start the first timer after the receiving module receives the first transmission.
  • the processing module is further configured to start the second timer when the first timer expires and/or the first transmission sent by the second communication device is not successfully decoded.
  • the processing module is further configured to determine that the HARQ feedback attribute corresponding to the first transmission is enabled before starting the first timer.
  • the foregoing apparatus 1000 further includes: a receiving module 1003, configured to receive the first control information from the second communication device;
  • the reserved resource for a transmission, and/or the resource used for transmitting the first transmission is not the first resource in the at least one resource corresponding to the first transmission.
  • the foregoing sending module may be a sending interface, a sending circuit, or a transmitter, etc.
  • the foregoing receiving module may be a receiving interface, a receiving circuit, or a receiver, etc.
  • the foregoing processing module may be one or more processors.
  • an embodiment of the present application provides a communication device.
  • the communication device may be a chip or a system-on-chip in a second communication device, and may also be a second communication device used to implement any of the foregoing embodiments.
  • the chip or system-on-chip includes a memory, and instructions are stored in the memory. When the instructions are called by the system-on-chip or the chip, the foregoing method is executed. Still referring to FIG.
  • the communication device 1000 may include: a processing module 1001, configured to start a first timer when it is determined that there is no reserved resource for retransmission of the first transmission on the side link, and / Or stop the second timer, the first timer is used to indicate the length of time before sending retransmission authorization, and the second timer is used to indicate the time length of sending retransmission; or, when it is determined that there is a second timer for retransmission on the side link
  • the reserved resource for a transmission, and/or the resource used to transmit the first transmission is the first resource in the at least one resource corresponding to the first transmission
  • the second timer is stopped, and the at least one reserved resource corresponding to the first transmission
  • the resource is obtained by selecting the resource for the first transmission.
  • the processing module is further configured to start the second timer when the first timer expires.
  • the above-mentioned apparatus further includes: a receiving module 1003 and a sending module 1002, a receiving module for receiving HARQ feedback corresponding to the second transmission sent by the first communication device; a processing module for receiving After receiving the HARQ feedback, start the first timer; or, the sending module, for sending the first transmission to the first communication device on the side link; the processing module, for sending the first transmission after the sending module, Delay m symbols to start the first timer, where m is a positive integer; or, after the sending module sends the first transmission, start the first timer.
  • the above-mentioned apparatus further includes: a sending module, configured to send the first transmission to the first communication device on the side link; and a processing module, configured to stop the first transmission after the sending module sends the first transmission. Two timers.
  • the processing module is further configured to determine that the HARQ feedback attribute corresponding to the first transmission is enabled before starting the first timer.
  • the foregoing sending module may be a sending interface, a sending circuit, or a transmitter, etc.
  • the foregoing receiving module may be a receiving interface, a receiving circuit, or a receiver, etc.
  • the foregoing processing module may be one or more processors.
  • the present application provides a communication device.
  • the communication device may be a chip or a system on a chip in a third communication device, and may also be a third communication device for implementing the method described in any of the above embodiments.
  • functional module The chip or system-on-chip includes a memory, and instructions are stored in the memory. When the instructions are called by the system-on-chip or the chip, the foregoing method is executed. Still referring to FIG.
  • the communication device 1000 may include: a processing module 1001, configured to, when it is determined that there is at least one reserved resource for retransmission of the second transmission on the side link, set the duration of the third timer Is configured to the first duration, and/or the duration of the fourth timer is configured to the second duration; when there is no at least one reserved resource for retransmission of the second transmission on the side link, the third communication device will The duration of the third timer is configured as the third duration, and/or the duration of the fourth timer is configured as the fourth duration;
  • the third timer is used to indicate the duration before sending the retransmission authorization
  • the fourth timer is used to indicate the duration before sending the retransmission.
  • the processing module is configured to determine the first time length according to the time domain interval between the first resource and the second resource in the at least one reserved resource, and/or the processing module is configured to determine the first duration according to the third communication device
  • the time difference between receiving the second transmission and determining the feedback response information determines the second duration, where the first resource is used to transmit the second transmission, and the second resource is at least one reserved resource that is closest to the first resource in the time domain H.
  • the above-mentioned second transmission may be TB, MAC PDU, and so on.
  • the third duration is a configured duration
  • the fourth duration is a configured duration
  • the first duration is configured as gap-k; gap is the time domain interval, and k is the time difference between the third communication device receiving the second transmission from the fourth communication device and determining the feedback response information. .
  • k is 2 or 3.
  • the processing module is further configured to start the third timer after the duration of the third timer is configured as the third duration, and/or the duration of the fourth timer is configured as the fourth duration , And/or stop the fourth timer.
  • the second duration is k+s or k-1+s symbols
  • k is the time difference
  • s is the number of symbols contained in one time slot.
  • the processing module is further configured to start the fourth timer after the duration of the fourth timer is configured as the second duration, and/or the duration of the fourth timer is configured as the fourth duration .
  • the processing module is further configured to start the fourth timer when the third timer expires and/or the second transmission is not successfully decoded.
  • the processing module is configured to start the third timer, and/or stop the fourth timer when the third duration is determined to be configured, and/or after the fourth duration is determined to be the configured duration. Timer. .
  • the sending module 1002 is also used to send HARQ feedback corresponding to the second transmission to the fourth communication device on the side link; the processing module is also used to send the HARQ feedback corresponding to the second transmission in the sending module
  • the third timer is started after HARQ feedback.
  • the processing module is further configured to start the third timer at the first symbol after the HARQ feedback corresponding to the second transmission is sent by the sending module.
  • the processing module is further configured to determine that the HARQ feedback attribute corresponding to the second transmission is enabled before the duration of the third timer is configured.
  • the apparatus 1000 further includes: a receiving module 1003 for receiving the second control information from the fourth communication device; a processing module for receiving the second control information according to the second control information It is determined whether there is at least one reserved resource for retransmission of the second transmission on the side link.
  • the foregoing sending module may be a sending interface, a sending circuit, or a transmitter, etc.
  • the foregoing receiving module may be a receiving interface, a receiving circuit, or a receiver, etc.
  • the foregoing processing module may be one or more processors.
  • an embodiment of the present application provides a communication device.
  • the communication device may be a chip or a system-on-a-chip in the fourth communication device, and may also be a fourth communication device for implementing any of the foregoing embodiments.
  • the chip or system-on-chip includes a memory, and instructions are stored in the memory. When the instructions are called by the system-on-chip or the chip, the foregoing method is executed. Still referring to FIG.
  • the communication device 1000 may include: a processing module 1001, configured to configure the duration of the third timer as the first duration, and/or configure the duration of the fourth timer as the second duration; or , A processing module, configured to configure the duration of the third timer to the third duration when there is no at least one reserved resource for retransmission of the second transmission on the side link, and/or configure the fourth timer The duration of is configured as the fourth duration;
  • the third timer is used to indicate the duration before sending the retransmission authorization
  • the fourth timer is used to indicate the duration before sending the retransmission.
  • the processing module is configured to determine the first time length according to the time domain interval between the first resource and the second resource in the at least one reserved resource, and/or the processing module is configured to determine the first duration according to the third communication device
  • the time difference between receiving the second transmission and determining the feedback response information determines the second duration, where the first resource is used to transmit the second transmission, and the second resource is at least one reserved resource that is closest to the first resource in the time domain H.
  • the above-mentioned second transmission may be TB, MAC PDU, and so on.
  • the third duration is a configured duration
  • the fourth duration is a configured duration
  • the first duration is gap-k; gap is the time domain interval, and k is the time difference between the third communication device receiving the second transmission from the fourth device and determining the feedback response information.
  • k is 2 or 3.
  • the second duration is k+s or k-1+s symbols
  • k is the time difference
  • s is the number of symbols contained in one time slot.
  • the above-mentioned apparatus 1000 further includes: a receiving module 1003, configured to receive the HARQ feedback processing module corresponding to the second transmission sent by the third communication device; When there are reserved resources for retransmission of the second transmission, the third timer is started after the receiving module receives the HARQ feedback, and/or the fourth timer is stopped.
  • the processing module is further configured to start the fourth timer when the third timer expires.
  • the receiving module is configured to receive the HARQ feedback processing module corresponding to the second transmission sent by the third communication device; the processing module is also configured to configure the duration of the third timer to the third duration, And/or after the duration of the fourth timer is configured as the fourth duration, the third timer is started after receiving the HARQ feedback corresponding to the second transmission from the third communication device, and/or the fourth timer is stopped.
  • the processing module is configured to start the third timer at the first symbol after the HARQ feedback corresponding to the second transmission is received by the receiving module.
  • the processing module is further configured to determine that the HARQ feedback attribute corresponding to the second transmission is enabled before the duration of the third timer is configured.
  • the sending module is further configured to send second control information to the third communication device, and the second control information is used to indicate whether there is a second control information for retransmission on the side link. At least one reserved resource for transmission.
  • the foregoing sending module may be a sending interface, a sending circuit, or a transmitter, etc.
  • the foregoing receiving module may be a receiving interface, a receiving circuit, or a receiver, etc.
  • the foregoing processing module may be one or more processors.
  • the embodiments of the present application provide a communication device.
  • the communication device may be a chip or a system-on-chip in the fifth communication device, and may also be a fifth communication device used to implement any of the foregoing embodiments.
  • the chip or system-on-chip includes a memory, and instructions are stored in the memory. When the instructions are called by the system-on-chip or the chip, the foregoing method is executed. Still referring to FIG.
  • the communication device 1000 may include: a receiving module 1103, configured to receive a third transmission sent by the sixth communication device on the side link; a processing module 1001, configured to determine when the third transmission corresponds to When the HARQ feedback attribute is disabled and/or the third transmission is not successfully decoded, the fifth timer is started, and the fifth timer is used to indicate the length of time before the retransmission authorization is received.
  • the processing module is configured to start a sixth timer after the fifth timer expires, and the sixth timer is used to indicate the duration of receiving the retransmission.
  • the processing module is configured to determine that the sixth communication device uses blind retransmission for the third transmission when it is determined that the HARQ feedback attribute corresponding to the third transmission is disabled.
  • the receiving module is configured to receive the third control information sent by the sixth communication device; the processing module is configured to determine that the sixth communication device uses blind repetition for the third transmission according to the received third control information.
  • the third control information is the control information corresponding to the third transmission sent by the sixth communication device on the side link.
  • the foregoing receiving module may be a receiving interface, a receiving circuit, or a receiver, etc.; the foregoing processing module may be one or more processors.
  • the embodiments of the present application provide a communication device.
  • the communication device may be a chip or a system on a chip in a sixth communication device, and may also be a sixth communication device used to implement any of the foregoing embodiments.
  • the chip or system-on-chip includes a memory, and instructions are stored in the memory. When the instructions are called by the system-on-chip or the chip, the foregoing method is executed. Still referring to FIG.
  • the communication device 1000 may include: a sending module 1002, configured to send a third transmission to the fifth communication device on the side link; a processing module 1001, configured to determine the HARQ corresponding to the third transmission
  • the fifth timer is delayed by h symbols, and the fifth timer is used to indicate the length of time before sending the retransmission authorization.
  • the processing module is further configured to: when the fifth timer expires, the sixth communication device starts a sixth timer, and the sixth timer is used to indicate the duration of sending a retransmission.
  • the processing module is further configured to determine to adopt blind retransmission for the third transmission when it is determined that the HARQ feedback attribute corresponding to the third transmission is not enabled.
  • the foregoing sending module may be a sending interface, a sending circuit, or a transmitter, etc.; the foregoing processing module may be one or more processors.
  • FIG. 11 is a schematic diagram of another structure of the communication device in an embodiment of the application.
  • the communication device 1100 may include: a processor 1101 , The memory 1101 and the communication interface 1103; the processor 1101 is coupled with the memory 1102, and the processor 1101 is configured to read and execute instructions in the memory 1102 to implement the implementation of the first communication device and the third communication device in any of the above embodiments.
  • Example and the communication method executed by the fifth communication device; the communication interface 1103 is configured to communicate with the second communication device, the fourth communication device embodiment, or the sixth communication device. .
  • the communication device 1100 may include: a processor 1101, a memory 1102, and a communication interface 1103; the processor 1101 is coupled with the memory 1102 to process The device 1101 is configured to read and execute instructions in the memory 1102 to implement the communication method executed by the second communication device, the fourth communication device embodiment, and the sixth communication device in any of the above embodiments; the communication interface 1103 is configured To communicate with the first communication device, the third communication device embodiment, or the fifth communication device.
  • the embodiments of the present application provide a computer-readable storage medium.
  • the computer-readable storage medium stores instructions. When the instructions are run on a computer, they are used to execute aspects such as the first to sixth aspects and the foregoing.
  • the embodiments of the present application provide a computer program or computer program product.
  • the computer program or computer program product is executed on a computer, the computer can realize the above-mentioned first to sixth aspects and any one thereof.
  • the computer-readable medium may include a computer-readable storage medium, which corresponds to a tangible medium, such as a data storage medium, or a communication medium that includes any medium that facilitates the transfer of a computer program from one place to another (for example, according to a communication protocol) .
  • a computer-readable medium may generally correspond to (1) a non-transitory tangible computer-readable storage medium, or (2) a communication medium, such as a signal or carrier wave.
  • Data storage media may be any available media that can be accessed by one or more computers or one or more processors to retrieve instructions, codes, and/or data structures for implementing the techniques described in this application.
  • the computer program product may include a computer-readable medium.
  • such computer-readable storage media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage devices, magnetic disk storage devices or other magnetic storage devices, flash memory, or structures that can be used to store instructions or data Any other media that can be accessed by the computer in the form of desired program code. And, any connection is properly termed a computer-readable medium.
  • any connection is properly termed a computer-readable medium.
  • coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave to transmit instructions from a website, server, or other remote source
  • coaxial cable Wire, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of media.
  • the computer-readable storage media and data storage media do not include connections, carrier waves, signals, or other temporary media, but are actually directed to non-transitory tangible storage media.
  • magnetic disks and optical disks include compact disks (CDs), laser disks, optical disks, digital versatile disks (DVD) and Blu-ray disks, where disks usually reproduce data magnetically, while optical disks use lasers to reproduce data optically data. Combinations of the above should also be included in the scope of computer-readable media.
  • DSP digital signal processors
  • ASIC application-specific integrated circuits
  • FPGA field programmable logic arrays
  • DSP digital signal processors
  • ASSIC application-specific integrated circuits
  • FPGA field programmable logic arrays
  • DSP digital signal processors
  • ASIC application-specific integrated circuits
  • FPGA field programmable logic arrays
  • processor may refer to any of the foregoing structure or any other structure suitable for implementing the techniques described herein.
  • the functions described by the various illustrative logical blocks, modules, and steps described herein may be provided in dedicated hardware and/or software modules configured for encoding and decoding, or combined Into the combined codec.
  • the technology may be fully implemented in one or more circuits or logic elements.
  • the technology of this application can be implemented in a variety of devices or devices, including wireless handsets, integrated circuits (ICs), or a set of ICs (for example, chipsets).
  • ICs integrated circuits
  • a set of ICs for example, chipsets.
  • Various components, modules, or units are described in this application to emphasize the functional aspects of the device for implementing the disclosed technology, but they do not necessarily need to be implemented by different hardware units.
  • various units can be combined with appropriate software and/or firmware in the codec hardware unit, or by interoperating hardware units (including one or more processors as described above). supply.

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Abstract

本申请提供一种通信方法及设备。该方法可以包括：当侧行链路上不存在用于重传第一传输的预留资源时，第一通信设备和/或第二通信设备启动第一定时器，和/或停止第二定时器；或，当侧行链路上存在用于重传第一传输的预留资源时，第一通信设备和第二通信设备停止第二定时器，如此，实现第一通信设备和第二通信设备通过第一定时器和第二定时器共同控制第一通信设备在侧行链路上的数据接收，使得第一通信设备可以不用一直监听与第一传输对应的HARQ进程关联的SCI，节省功耗。

Description

一种通信方法及设备
本申请要求于2020年4月10日提交中国专利局、申请号为202010281183.4、申请名称为“一种通信方法及设备”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，特别涉及一种通信方法及设备。
背景技术
新无线(new radio，NR)系统是目前主流的无线通信技术，其针对车联网(vehicle to everthing，V2X)业务特性及新的业务传输需求，目标是支持更低延迟，更高可靠性的V2X通信。但是，在侧行链路(sidelink)中，接收端用户设备(RX UE)会一直监听物理侧行链路共享信道(physical sidelink shared channel，PSSCH)，查看是否有来自及发送端用户设备比(TX UE)的信息。
然而，在sidelink中，RX UE并不是一直在和TX UE进行有效信息的交互，也不会总是执行上传或者下载业务，即使在通信时也不会一直有数据传输。那么，在收发UE之间没有数据交互的时候，如果RX UE还持续监听PSSCH，会增加RX UE的功耗。
发明内容
本申请提供了一种通信方法及设备，以节省RX UE的功耗。
第一方面，本申请提供种一种通信方法，可以应用于侧行链路通信系统，如车联网系统，该系统可以包括第一通信设备和第二通信设备，其中，第二通信设备可以作为发送端设备(即TX UE)，第一通信设备可以作为接收端设备(即RX UE)。那么，当侧行链路上不存在用于重传第一传输的预留资源时，第一通信设备启动第一定时器，和/或停止第二定时器；或，当侧行链路上存在用于重传第一传输的预留资源，和/或用于传输第一传输的资源为第一传输对应的至少一个资源中的第一个资源时，第一通信设备停止第二定时器。
在本申请中，上述第一传输(transmission)可以为传输块(transform block，TB)、媒介访问控制层分组数据单元(medium access control packet data unit，MAC PDU)等。
第二通信设备在为第一传输进行资源选择的时候，可以为第一传输选择至少一个资源(如1至3个资源)。这些资源可以用于初传第一传输，也可以用于重传第一传输。第二通信设备可以在至少一个资源中的某一个资源上向第一通信设备传输(初传或重传)第一传输，那么，在时域上，在至少一个资源中位于用于传输第一传输的资源之后的其他资源就是第一传输对应的预留资源。
在本申请实施例中，上述第一定时器用于指示收到重传授权前的时长，如第一定时器用于指示通信设备收到重传授权前的最小时长，可以理解为通信设备期望在收到 重传授权前所等待的时长的最小值；第二定时器用于指示收到重传的时长，如第二定时器用于指示通信设备收到重传的最大时长，可以理解为通信设备期望收到重传所监听的时长的最大值。
基于第一方面，在一些可能的实施方式中，第一定时器和第二定时器与第一传输对应的HARQ进程对应。
在本申请中，在侧行链路中，第一通信设备在确定不存在用于重传第一传输的预留资源(或者当前用于传输第一传输的资源为至少一个资源中的最后一个资源)的时候，第一通信设备启动第一定时器和/或停止第二定时器，此时，第一通信设备不用监听第一传输对应的HARQ进程关联的SCI，节省功耗；或者，第一通信设备在确定至少一个预留资源中存在重传预留资源，或者当前传输第一传输的资源为至少一个预留资源中的第一预留资源，第一通信设备停止第二定时器，此时，第一通信设备停止对物理侧行链路控制信道(physical sidelink control channel，PSCCH)和/或PSSCH的监听，节省功耗。
基于第一方面，在一些可能的实施方式中，第一通信设备启动第一定时器，包括：第一通信设备在侧行链路上向第二通信设备发送与第一传输对应的混合自动重传请求hybrid automatic retransmission request，HARQ)反馈后启动第一定时器；或，第一通信设备在发送HARQ反馈后的第一个符号启动第一定时器，或，所述第一通信设备在收到所述第一传输后，启动所述第一定时器。
在本申请中，第二通信设备向第一通信设备发送第一传输后，第一通信设备向第二通信设备对第一传输进行HARQ反馈，也就是说第一通信设备向第二通信设备发送第一传输对应的HARQ反馈(也就是说第一传输关联到某个HARQ进程)，那么，第一通信设备在发送完HARQ反馈后启动第一定时器，或者第一通信设备在发送完HARQ反馈后的第一个符号启动第一定时器，使得第一通信设备不用监听第一传输对应的HARQ进程关联的SCI，节省功耗。
基于第一方面，在一些可能的实施方式中，第一通信设备停止第二定时器，包括：第一通信设备在侧行链路上向第二通信设备发送与第一传输对应的HARQ反馈后停止第二定时器；或，第一通信设备在发送HARQ反馈后的第一个符号上停止二定时器。
在本申请中，第二通信设备向第一通信设备发送第一传输后，第一通信设备向第二通信设备对第一传输进行HARQ反馈，也就是说第一通信设备向第二通信设备发送第一传输对应的HARQ反馈，那么，当第一通信设备发送完HARQ反馈后，停止第二定时器，使得第一通信设备不用监听第一传输对应的HARQ进程关联的SCI，节省功耗。
基于第一方面，在一些可能的实施方式中，上述方法还包括：当第一定时器超时，和/或第一通信设备对第二通信设备发送的第一传输未成功解码时，第一通信设备启动第二定时器，开始监听PSCCH和/或PSSCH，等待第一传输重传。
基于第一方面，在一些可能的实施方式中，第一通信设备的第一定时器与第二通信设备的第一定时器的时长相同，第一通信设备的第二定时器与第二通信设备的第二定时器的时长相同；或，第二通信设备的第一定时器的时长比第一通信设备的第一定时器的时长长n个符号，第一通信设备的第二定时器与第二通信设备的第二定时器的时长相同，n为正整数。
基于第一方面，在一些可能的实施方式中，在第一通信设备启动第一定时器之前，方法还包括：第一通信设备确定第一传输对应的HARQ反馈属性为使能。
在本申请中，第一传输对应的HARQ反馈属性是指网络侧设备、第一通信设备或者第二通信设备在为第一通信设备配逻辑信道(logic channel，LCH)时，会为LCH配置HARQ反馈属性，HARQ反馈属性用于指示LCH是否支持和/或开启HARQ反馈。相同HARQ反馈属性的LCH才能被封装在一个传输中。那么，第一传输对应的HARQ反馈属性就是指封装在第一传输中的LCH的HARQ反馈属性。或者，第一传输对应的HARQ反馈属性是指网络侧设备、第一通信设备或者第二通信设备在为第一通信设备配置承载(radio bearer)时，会为每个承载配置HARQ反馈属性，HARQ反馈属性用于指示该承载是否支持和/或开启HARQ反馈。那么，第一传输对应的HARQ反馈属性就是指第一传输对应的承载的HARQ反馈属性。
基于第一方面，在一些可能的实施方式中，方法还包括：第一通信设备接收来自第二通信设备的第一控制信息；第一通信设备根据第一控制信息，确定存在用于重传所述第一传输的预留资源，和/或用于传输所述第一传输的资源为所述第一传输对应的至少一个资源中的第一个资源；第一通信设备根据第一控制信息，确定不存在用于重传第一传输的预留资源，和/或用于传输第一传输的资源不是第一传输对应的至少一个资源中的第一个资源。
在本申请中，第一控制信息可以为侧行链路控制信息(sidelink control information，SCI)
第二方面，本申请提供种一种通信方法，可以应用于侧行链路通信系统，如车联网系统，该系统可以包括第一通信设备和第二通信设备，其中，第二通信设备可以作为发送端设备(即TX UE)，第一通信设备可以作为接收端设备(即RX UE)。那么，当侧行链路上不存在用于重传第一传输的预留资源时，第二通信设备启动第一定时器，和/或停止第二定时器，第一定时器用于指示发送重传授权前的时长，第二定时器用于指示发送重传的时长；或，当侧行链路上存在用于重传第一传输的预留资源，和/或用于传输第一传输的资源为第一传输对应的至少一个资源中的第一个资源时，第二通信设备停止第二定时器，第一传输对应的至少一个预留资源是通过对第一传输进行资源选择得到的。
在本申请中，第一通信设备与第二通信设备两侧设置的第一定时器和第二定时器是对称的。当第一通信设备启动第一定时器时，第二通信设备同时启动第一定时器，当第一通信设备启动或停止第二定时器时，第二通信设备同时启动或停止第二定时器。
基于第二方面，在一些可能的实施方式中，第一定时器和第二定时器与第一传输对应的HARQ进程对应。
基于第二方面，在一些可能的实施方式中，方法还包括：当第一定时器超时时，第二通信设备启动第二定时器。
基于第二方面，在一些可能的实施方式中，第二通信设备启动第一定时器，包括：第二通信设备在收到来自第一通信设备的HARQ反馈后，启动第一定时器；或，第二通信设备在发送第一传输后，延迟m个符号启动第一定时器，m为正整数；或，第二通信设备在发送第一传输后，启动第一定时器。
基于第二方面，在一些可能的实施方式中，第二通信设备停止第二定时器，包括：第二通信设备在侧行链路上向第一通信设备发送第一传输后，停止第二定时器。
基于第二方面，在一些可能的实施方式中，第二通信设备的第一定时器与第一通信设备的第一定时器的时长相同，第一通信设备的第二定时器与第一通信设备的第二定时器的时长相同；或，第二通信设备的第一定时器的时长比第一通信设备的第一定时器的时长长n个符号，第一通信设备的第二定时器与第一通信设备的第二定时器的时长相同，n为正整数。
基于第二方面，在一些可能的实施方式中，在第二通信设备启动第一定时器之前，方法还包括：第二通信设备确定第一传输对应的HARQ反馈属性为使能。
第三方面，本申请提供种一种通信方法，可以应用于侧行链路通信系统，如车联网系统，该系统可以包括第三通信设备和第四通信设备，其中，第四通信设备可以作为发送端设备(即TX UE)，第三通信设备可以作为接收端设备(即RX UE)。那么，当侧行链路上存在用于重传第二传输的至少一个预留资源时，第三通信设备将第三定时器的时长配置为第一时长，和/或将第四定时器的时长配置为第二时长；当侧行链路上不存在用于重传第二传输的至少一个预留资源时，第三通信设备将第三定时器的时长配置为第三时长，和/或将第四定时器的时长配置为第四时长；
其中，第三定时器用于指示收到重传授权前的时长，第四定时器用于指示收到重传的时长。
可选的，第三通信设备根据第一资源与至少一个预留资源中的第二资源之间的时域间隔确定第一时长，和/或，第三通信设备根据第三通信设备从收到第二传输到确定反馈应答信息之间的时间差确定第二时长，其中，第一资源用于传输第二传输，第二资源为至少一个预留资源中与第一资源在时域上最近的资源。
在本申请中，上述第二传输可以为TB、MAC PDU等。
可选的，第三时长为已配置时长，和/或第四时长为已配置时长。
基于第三方面，在一些可能的实施方式中，第一时长为gap-k；gap为时域间隔，k为第三通信设备从收到来自第四通信设备的第二传输到确定反馈应答信息之间的时间差。
基于第三方面，在一些可能的实施方式中，k取2或3。
基于第三方面，在一些可能的实施方式中，在所述第三通信设备将第三定时器的时长配置为第一时长或者所述第三通信设备将第三定时器的时长配置为第三时长之后，方法还包括：第三通信设备启动第三定时器，和/或停止第四定时器。
基于第三方面，在一些可能的实施方式中，第二时长为k+s或k-1+s个符号，k为时间差，s为一个时隙中包含的符号数。
基于第三方面，在一些可能的实施方式中，方法还包括：当第三定时器超时，和/或第三通信设备对第四通信设备发送的第二传输未成功解码时，第三通信设备启动第四定时器。
基于第三方面，在一些可能的实施方式中，在第三通信设备将所述第三时长确定为已配置时，和/或将所述第四时长确定为已配置时长之后，方法还包括：第三通信设备启动第三定时器，和/或停止第四定时器。
基于第三方面，在一些可能的实施方式中，在第三通信设备根据多个预留资源中的第一预留资源与第二预留资源之间的时域间隔配置第三定时器的时长之前，方法还包括：第三通信设备确定第二传输对应的HARQ反馈属性为使能。
基于第三方面，在一些可能的实施方式中，第三定时器和第四定时器与第二传输对应的HARQ进程对应。
基于第三方面，在一些可能的实施方式中，方法还包括：第三通信设备根据收到的来自所述第四通信设备的第二控制信息确定侧行链路上是否存在用于重传第二传输的至少一个预留资源。
第四方面，本申请提供种一种通信方法，可以应用于侧行链路通信系统，如车联网系统，该系统可以包括第三通信设备和第四通信设备，其中，第四通信设备可以作为发送端设备(即TX UE)，第三通信设备可以作为接收端设备(即RX UE)。当侧行链路上存在用于传输第二传输的多个预留资源时，第四通信设备将第三定时器的时长配置为第一时长，和/或将第四定时器的时长配置为第二时长；当侧行链路上不存在用于重传第二传输的至少一个预留资源时，第四通信设备将第三定时器的时长配置为第三时长，和/或将第四定时器的时长配置为第四时长；
其中，第三定时器用于指示发送重传授权前的时长，第四定时器用于指示发送重传的时长。
可选的，第四通信设备根据第一资源与至少一个预留资源中的第二资源之间的时域间隔确定第一时长，和/或，第四通信设备根据第三通信设备从收到第二传输到确定反馈应答信息之间的时间差确定第二时长，其中，第一资源用于传输第二传输，第二资源为至少一个预留资源中与第一资源在时域上最近的资源。
在本申请中，上述第二传输可以为TB、MAC PDU等。
可选的，第三时长为已配置时长，和/或，第四时长为已配置时长。
基于第四方面，在一些可能的实施方式中，第一时长为gap-k；gap为时域间隔，k为第三通信设备从收到来自第四设备的第二传输到确定反馈应答信息之间的时间差。
基于第四方面，在一些可能的实施方式中，k取2或3。
基于第四方面，在一些可能的实施方式中，第二时长为k+s或k-1+s个符号，k为上述时间差，s为一个时隙中包含的符号数。
基于第四方面，在一些可能的实施方式中，在所述第四通信设备将第三定时器的时长配置为第一时长或者所述第四通信设备将第三定时器的时长配置为第三时长之后，方法还包括：第四通信设备接收来自第三通信设备的HARQ反馈后启动第三定时器，和/或停止第四定时器。
基于第四方面，在一些可能的实施方式中，方法还包括：当第三定时器超时时，第四通信设备启动第四定时器。
基于第四方面，在一些可能的实施方式中，在第四通信设备将第三定时器的时长配置为第三时长，和/或将第四定时器的时长配置为第四时长之后，方法还包括：第四通信设备接收来自第三通信设备的HARQ反馈后启动第三定时器，和/或停止第四定时器。
基于第四方面，在一些可能的实施方式中，第四通信设备接收来自第三通信设备的HARQ反馈后启动第三定时器，包括：第四通信设备在接收HARQ反馈后的第一个符 号启动第三定时器。
基于第四方面，在一些可能的实施方式中，在第四通信设备根据多个预留资源中的第一预留资源与第二预留资源之间的时域间隔配置第三定时器的时长之前，方法还包括：第四通信设备确定第二传输对应的HARQ反馈属性为使能。
基于第四方面，在一些可能的实施方式中，第三定时器和第四定时器与第二传输对应的HARQ进程对应。
基于第四方面，在一些可能的实施方式中，方法还包括：第四通信设备向第三通信设备发送第二控制信息，第二控制信息用于指示侧行链路上是否存在用于重传第二传输的至少一个预留资源。
第五方面，本申请提供种一种通信方法，可以应用于侧行链路通信系统，如车联网系统，该系统可以包括第五通信设备和第六通信设备，其中，第六通信设备可以作为发送端设备(即TX UE)，第五通信设备可以作为接收端设备(即RX UE)。当侧行链路上发送的第三传输对应的混合自动重传请求HARQ反馈属性为非使能，和/或第五通信设备对第三传输未成功解码时，第五通信设备启动第五定时器，第五定时器用于指示收到重传授权前的时长。
在本申请中，当侧行链路上发送的第三传输对应的混合自动重传请求HARQ反馈属性为非使能时，第五通信设备可以启动第五定时器；或者，当侧行链路上发送的第三传输对应的混合自动重传请求HARQ反馈属性为非使能，以及第五通信设备对第三传输未成功解码时，第五通信设备启动第五定时器。
在本申请中，上述第三传输可以为TB、MAC PDU等。
基于第五方面，在一些可能的实施方式中，方法还包括：当第五定时器超时后，第五通信设备启动第六定时器，第六定时器用于指示收到重传的时长。
基于第五方面，在一些可能的实施方式中，方法还包括：当第三传输对应的HARQ反馈属性为非使能时，第五通信设备确定第六通信设备对第三传输采用盲重传。
基于第五方面，在一些可能的实施方式中，第五通信设备确定第六通信设备对第三传输采用盲重传，包括：第五通信设备根据接收的第三控制信息确定第六通信设备对第三传输采用盲重传，第三控制信息为第六通信设备在侧行链路上发送的第三传输对应的控制信息。
第六方面，本申请提供种一种通信方法，可以应用于侧行链路通信系统，如车联网系统，该系统可以包括第五通信设备和第六通信设备，其中，第六通信设备可以作为发送端设备(即TX UE)，第五通信设备可以作为接收端设备(即RX UE)。当侧行链路上发送的第三传输对应的混合自动重传请求HARQ反馈属性为非使能时，第六通信设备向第五通信设备发送第三传输后，延迟h个符号启动第五定时器，第五定时器用于指示发送重传授权前的时长。
在本申请中，上述第三传输可以为TB、MAC PDU等。
基于第六方面，在一些可能的实施方式中，方法还包括：当第五定时器超时后，第六通信设备启动第六定时器，第六定时器用于指示发送重传的时长。
基于第六方面，在一些可能的实施方式中，方法还包括：当第三传输对应的HARQ反馈属性为非使能时，第六通信设备确定对第三传输采用盲重传。
第七方面，本申请提供一种通信装置，该通信装置可以为第一通信设备中的芯片或者片上系统，还可以为第一通信设备中用于实现上述第一方面或其任一可能的实施方式方法的功能模块。该通信装置可以包括：处理模块，用于当确定在侧行链路上不存在用于重传第一传输的预留资源时，启动第一定时器，和/或停止第二定时器；或，当确定在侧行链路上存在用于重传第一传输的预留资源，和/或用于传输第一传输的资源为第一传输对应的至少一个资源中的第一个资源时，停止第二定时器。
第二通信设备在为第一传输进行资源选择的时候，可以为第一传输选择至少一个资源(如1至3个资源)。这些资源可以用于初传第一传输，也可以用于重传第一传输。第二通信设备可以在至少一个资源中的某一个资源上向第一通信设备传输(初传或重传)第一传输，那么，在时域上，位于用于传输第一传输的资源之后的其他资源就是第一传输对应的预留资源。
上述第一定时器用于指示收到重传授权前的时长，第二定时器用于指示收到重传的时长。
基于第七方面，在一些可能的实施方式中，上述装置还可以包括：发送模块，用于在侧行链路上向第二通信设备发送与第一传输对应的HARQ反馈；接收模块，用于接收第二通信设备发送的第一传输；相应的，处理模块，用于在发送模块发送与第一传输对应的HARQ反馈后启动第一定时器；或，在发送模块发送HARQ反馈后的第一个符号启动第一定时器；或，在接收模块收到所述第一传输后，启动所述第一定时器。
基于第七方面，在一些可能的实施方式中，发送模块，用于在侧行链路上向第二通信设备发送与第一传输对应的HARQ反馈，处理模块还用于在发送模块发送与第一传输对应的HARQ反馈后停止第二定时器；或，在发送模块发送HARQ反馈后的第一个符号上停止二定时器。
基于第七方面，在一些可能的实施方式中，处理模块，还用于当第一定时器超时，和/或对第二通信设备发送的第一传输未成功解码时，启动第二定时器。
基于第七方面，在一些可能的实施方式中，处理模块，还用于在启动第一定时器之前，确定第一传输对应的HARQ反馈属性为使能。
基于第七方面，在一些可能的实施方式中，接收模块，用于接收自第二通信设备的第一控制信息；处理模块，用于根据第一控制信息确定是否存在用于重传第一传输的预留资源，和/或用于传输所述第一传输的资源不是所述第一传输对应的至少一个资源中的第一个资源。
第八方面，本申请提供一种通信装置，该通信装置可以为第二通信设备中的芯片或者片上系统，还可以为第二通信设备中用于实现上述第二方面或其任一可能的实施方式方法的功能模块。该通信装置可以包括：处理模块，用于当确定在侧行链路上不存在用于重传第一传输的预留资源时，启动第一定时器，和/或停止第二定时器，第一定时器用于指示发送重传授权前的时长，第二定时器用于指示发送重传的时长；或，当确定在侧行链路上存在用于重传第一传输的预留资源，和/或用于传输第一传输的资源为第一传输对应的至少一个资源中的第一个资源时，停止第二定时器，第一传输对应的至少一个预留资源是通过对第一传输进行资源选择得到的。
基于第八方面，在一些可能的实施方式中，处理模块，还用于当第一定时器超时 时，启动第二定时器。
基于第八方面，在一些可能的实施方式中，上述装置还包括：接收模块和发送模块，用于收到第一通信设备发送的第二传输对应的HARQ反馈；处理模块，用于在接收模块收到HARQ反馈后，启动第一定时器；或，发送模块，用于在侧行链路上向第一通信设备发送第一传输；处理模块，用于在发送模块在发送第一传输后，延迟m个符号启动第一定时器，m为正整数；或，在发送模块发送第一传输后，启动第一定时器。
基于第八方面，在一些可能的实施方式中，上述装置还包括：发送模块，用于在侧行链路上向第一通信设备发送第一传输；处理模块，用于在发送模块发送第一传输后，停止第二定时器。
基于第八方面，在一些可能的实施方式中，处理模块，还用于在启动第一定时器之前，确定第一传输对应的HARQ反馈属性为使能。
第九方面，本申请提供一种通信装置，该通信装置可以为第三通信设备中的芯片或者片上系统，还可以为第三通信设备中用于实现上述第三方面或其任一可能的实施方式方法的功能模块。该通信装置可以包括：处理模块，用于当侧行链路上存在用于重传第二传输的至少一个预留资源时，将第三定时器的时长配置为第一时长，和/或将第四定时器的时长配置为第二时长；当侧行链路上不存在用于重传第二传输的至少一个预留资源时，第三通信设备将第三定时器的时长配置为第三时长，和/或将第四定时器的时长配置为第四时长；
其中，第三定时器用于指示收到重传授权前的时长，第四定时器用于指示收到重传的时长。
可选的，处理模块，用于根据第一资源与至少一个预留资源中的第二资源之间的时域间隔确定第一时长，和/或，处理模块，用于根据第三通信设备从收到第二传输到确定反馈应答信息之间的时间差确定第二时长，其中，第一资源用于传输第二传输，第二资源为至少一个预留资源中与第一资源在时域上最近的资源。
在本申请中，上述第二传输可以为TB、MAC PDU等。
可选的，第三时长为已配置时长，和/或，第四时长为已配置时长。
基于第九方面，在一些可能的实施方式中，第一时长为gap-k；gap为时域间隔，k为第三通信设备从收到来自第四通信设备的第二传输到确定反馈应答信息之间的时间差。
基于第九方面，在一些可能的实施方式中，k取2或3。
基于第九方面，在一些可能的实施方式中，处理模块，还用于在将第三定时器的时长配置为第三时长，和/或将第四定时器的时长配置为第四时长之后，启动第三定时器，和/或停止第四定时器。
基于第九方面，在一些可能的实施方式中，第二时长为k+s或k-1+s个符号，k为时间差，s为一个时隙中包含的符号数。
基于第九方面，在一些可能的实施方式中，处理模块，还用于在将第四定时器的时长配置为第二时长，和/或将第四定时器的时长配置为第四时长之后，启动第四定时器。
基于第九方面，在一些可能的实施方式中，处理模块，还用于当第三定时器超时， 和/或对第二传输未成功解码时，启动第四定时器。
基于第九方面，在一些可能的实施方式中，处理模块，用于在将第三时长确定为已配置时，和/或将第四时长确定为已配置时长之后，启动第三定时器，和/或停止第四定时器。
基于第九方面，在一些可能的实施方式中，发送模块，还用于在侧行链路上向第四通信设备发送第二传输对应的HARQ反馈；处理模块，还用于在发送模块发送第二传输对应的HARQ反馈后启动第三定时器。
基于第九方面，在一些可能的实施方式中，处理模块，还用于在发送模块发送第二传输对应的HARQ反馈后的第一个符号启动第三定时器。
基于第九方面，在一些可能的实施方式中，处理模块，还用于在配置第三定时器的时长之前，确定第二传输对应的HARQ反馈属性为使能。
基于第九方面，在一些可能的实施方式中，装置还包括：接收模块，用于收到的来自所述第四通信设备的第二控制信息；处理模块，用于根据第二控制信息确定侧行链路上是否存在用于重传第二传输的至少一个预留资源。
第十方面，本申请提供一种通信装置，该通信装置可以为第四通信设备中的芯片或者片上系统，还可以为第四通信设备中用于实现上述第四方面或其任一可能的实施方式方法的功能模块。该通信装置可以包括：发送模块，用于在侧行链路上存在用于传输第二传输；处理模块，用于当侧行链路上存在用于传输第二传输的多个预留资源时，将第三定时器的时长配置为第一时长，和/或将第四定时器的时长配置为第二时长；或者，处理模块，用于当侧行链路上不存在用于重传第二传输的至少一个预留资源时，将第三定时器的时长配置为第三时长，和/或将第四定时器的时长配置为第四时长；
其中，第三定时器用于指示发送重传授权前的时长，第四定时器用于指示发送重传的时长。
可选的，处理模块，用于根据第一资源与至少一个预留资源中的第二资源之间的时域间隔确定第一时长，和/或，处理模块，用于根据第三通信设备从收到第二传输到确定反馈应答信息之间的时间差确定第二时长，其中，第一资源用于传输第二传输，第二资源为至少一个预留资源中与第一资源在时域上最近的资源。
在本申请中，上述第二传输可以为TB、MAC PDU等。
可选的，第三时长为已配置时长，和/或，第四时长为已配置时长。
基于第十方面，在一些可能的实施方式中，第一时长为gap-k；gap为时域间隔，k为第三通信设备从收到来自第四设备的第二传输到确定反馈应答信息之间的时间差。
基于第十方面，在一些可能的实施方式中，k取2或3。
基于第十方面，在一些可能的实施方式中，第二时长为k+s或k-1+s个符号，k为时间差，s为一个时隙中包含的符号数。
基于第十方面，在一些可能的实施方式中，上述装置还包括：接收模块，用于接收第三通信设备发送的第二传输对应的HARQ反馈处理模块；处理模块，还用于当确定在侧行链路上存在用于重传第二传输的预留资源时，在接收模块接收HARQ反馈后启动第三定时器，和/或停止第四定时器。
基于第十方面，在一些可能的实施方式中，处理模块，还用于当第三定时器超时 时，启动第四定时器。
基于第十方面，在一些可能的实施方式中，接收模块，用于接收第三通信设备发送的第二传输对应的HARQ反馈；处理模块，还用于在将第三定时器的时长配置为第三时长，和/或将第四定时器的时长配置为第四时长之后，在接收来自第三通信设备的第二传输对应的HARQ反馈后启动第三定时器，和/或停止第四定时器。
基于第十方面，在一些可能的实施方式中，处理模块，用于在接收模块接收第二传输对应的HARQ反馈后的第一个符号启动第三定时器。
基于第十方面，在一些可能的实施方式中，处理模块，还用于在配置第三定时器的时长之前，确定第二传输对应的HARQ反馈属性为使能。
基于第十方面，在一些可能的实施方式中，发送模块，还用于向第三通信设备发送第二控制信息，第二控制信息用于指示侧行链路上是否存在用于重传第二传输的至少一个预留资源。
第十一方面，本申请提供一种通信装置，该通信装置可以为第五通信设备中的芯片或者片上系统，还可以为第五通信设备中用于实现上述第五方面或其任一可能的实施方式方法的功能模块。该通信装置可以包括：接收模块，用于接收第六通信设备在侧行链路上发送的第三传输；处理模块，用于当确定第三传输对应的HARQ反馈属性为非使能，和/或对第三传输未成功解码时，启动第五定时器，第五定时器用于指示收到重传授权前的时长。
基于第十一方面，在一些可能的实施方式中，处理模块，用于当第五定时器超时后，启动第六定时器，第六定时器用于指示收到重传的时长。
基于第十一方面，在一些可能的实施方式中，处理模块，用于当确定第三传输对应的HARQ反馈属性为非使能时，确定第六通信设备对第三传输采用盲重传。
基于第十一方面，在一些可能的实施方式中，接收模块，用于接收第六通信设备发送对的第三控制信息；处理模块，用于根据接收的第三控制信息确定第六通信设备对第三传输采用盲重传，第三控制信息为第六通信设备在侧行链路上发送的第三传输对应的控制信息。
第十二方面，本申请提供一种通信装置，该通信装置可以为第六通信设备中的芯片或者片上系统，还可以为第六通信设备中用于实现上述第六方面或其任一可能的实施方式方法的功能模块。该通信装置可以包括：发送模块，用于在侧行链路上向第五通信设备发送第三传输；处理模块，用于当确定第三传输对应的HARQ反馈属性为非使能时，在向第五通信设备发送第三传输后，延迟h个符号启动第五定时器，第五定时器用于指示发送重传授权前的时长。
基于第十二方面，在一些可能的实施方式中，处理模块，还用于当第五定时器超时后，第六通信设备启动第六定时器，第六定时器用于指示发送重传的时长。
基于第十二方面，在一些可能的实施方式中，处理模块，还用于当确定第三传输对应的HARQ反馈属性为非使能时，确定对第三传输采用盲重传。
第十三方面，本申请提供一种通信装置，包括：处理器、存储器和通信接口；处理器与存储器耦合，处理器被配置为读取并执行存储器中的指令，以实现上述第一方面、第三方面、第五方面及其任一种可能的实现方式所述的通信方法；通信接口被配置为 与第二通信设备、第四通信设备施例或者第六通信设备通信。
第十四方面，本申请提供一种通信装置，包括：处理器、存储器和通信接口；处理器与存储器耦合，处理器被配置为读取并执行存储器中的指令，以实现上述第二方面、第四方面、第六方面及其任一种可能的实现方式所述的通信方法；通信接口被配置为与第一通信设备、第三通信设备施例或者第五通信设备通信。
第十五方面，本申请提供一种计算机可读存储介质，计算机可读存储介质存储有指令，当指令在计算机上运行时，用于执行如上述第一方面至第六方面及其任一种可能的实施方式所述的通信方法。
第十六方面，本申请提供一种计算机程序或计算机程序产品，当计算机程序或计算机程序产品在计算机上被执行时，使得计算机实现如上述第一方面至第六方面及其任一种可能的实施方式所述的通信方法。
应当理解的是，本申请的第七至十六方面与本申请的第一方面至第六方面的技术方案一致，各方面及对应的可行实施方式所取得的有益效果相似，不再赘述。
附图说明
为了更清楚地说明本申请实施例或背景技术中的技术方案，下面将对本申请实施例或背景技术中所需要使用的附图进行说明。
图1为本申请实施例中的通信系统的一种架构示意图；
图2为本申请实施例中的另一种架构示意图；
图3为本申请实施例中的一个传输对应的至少一个资源的示意图；
图4为本申请实施例中的第一通信设备侧通信方法的流程示意图；
图5为本申请实施例中的第二通信设备侧通信方法的流程示意图；
图6为本申请实施例中的第三通信设备侧通信方法的流程示意图；
图7为本申请实施例中的第四通信设备侧通信方法的流程示意图；
图8为本申请实施例中的第五通信设备侧通信方法的流程示意图；
图9为本申请实施例中的第六通信设备侧通信方法的流程示意图；
图10为本申请实施例中的通信装置的一种结构示意图；
图11为本申请实施例中的通信装置的另一种结构示意图。
具体实施方式
下面结合本申请实施例中的附图对本申请实施例进行描述。以下描述中，参考形成本申请一部分并以说明之方式示出本申请实施例的具体方面或可使用本申请实施例的具体方面的附图。应理解，本申请实施例可在其它方面中使用，并可包括附图中未描绘的结构或逻辑变化。例如，应理解，结合所描述方法的揭示内容可以同样适用于用于执行所述方法的对应设备或系统，且反之亦然。例如，如果描述一个或多个具体方法步骤，则对应的设备可以包含如功能单元等一个或多个单元，来执行所描述的一个或多个方法步骤(例如，一个单元执行一个或多个步骤，或多个单元，其中每一个都执行多个步骤中的一个或多个)，即使附图中未明确描述或说明这种一个或多个单元。另一方面，例如，如果基于如功能单元等一个或多个单元描述具体装置，则对应的方法可以包含一个步骤来执行一个或多个单 元的功能性(例如，一个步骤执行一个或多个单元的功能性，或多个步骤，其中每一个执行多个单元中一个或多个单元的功能性)，即使附图中未明确描述或说明这种一个或多个步骤。进一步，应理解的是，除非另外明确提出，本文中所描述的各示例性实施例和/或方面的特征可以相互组合。
新无线(new radio，NR)系统是目前主流的无线通信技术，其针对车联网(vehicle to everthing，V2X)业务特性及新的业务传输需求，目标是支持更低延迟，更高可靠性的V2X通信。但是，在侧行链路(sidelink，SL)中，接收端用户设备(RX UE)会一直监听PSCCH和/或PSSCH，查看是否有来自及发送端用户设备的(TX UE)的信息。然而，在sidelink中，RX UE并不是一直在和TX UE进行有效信息的交互，也不会总是执行上传或者下载业务，即使在通信时也不会一直有数据传输。那么，在收发UE之间没有数据交互的时候，如果RX UE还持续监听PPSCCH和/或PSSCH，会增加RX UE的功耗。
那么，为了解决这个问题，本申请实施例提供一种通信系统，该通信系统可以为侧链路通信系统，侧链路通信系统可以适应于车联网(vehicle to everything，V2X)、智能网联汽车及自动驾驶汽车等领域。图1为本申请实施例中的通信系统的一种架构示意图，参见图1所示，该通信系统10中可以包括：网络侧设备11和通信设备12。图2为本申请实施例中的另一种架构示意图，参见图2所示，该通信系统10还可以包括多个通信设备12。当然，在本申请实施例中，通信系统包含的网元的类型、数量，以及网元之间的连接关系不限于此。
在本申请实施例中，通信设备与网络侧设备通信的同时，还可以与其他通信设备通信。网络侧设备可以对通信设备之间通信的侧行链路(sidelink)进行资源的配置、调度、协调等，辅助通信设备之间直接进行通信。通信设备也可以自行对于其他通信设备之间通信的侧链路进行资源的配置、调度、协调等，本申请实施例不做具体限定。
上述网络侧设备可以是接入网侧用于支持终端接入无线通信系统的设备，例如，可以是5G接入技术通信系统中的下一代基站(next generation NodeB，gNB)、发送接收点(transmission reception point，TRP)、中继节点(relay node)、接入点(access point，AP)、路边装置(road site unit，RSU)等。
上述通信设备可以是一种向用户提供语音或者数据连通性的设备，例如也可以称为UE、移动台(mobile station)、用户单元(subscriber unit)、站台(STAtion)或者终端(TE，Terminal Equipment)等。通信设备可以为蜂窝电话(cellular phone)、个人数字助理(PDA，Personal Digital Assistant)、无线调制解调器(modem)、手持设备(handheld)、膝上型电脑(laptop computer)、无绳电话(cordless phone)、无线本地环路(WLL，Wireless Local Loop)台或者平板电脑(pad)等。随着无线通信技术的发展，可以接入无线通信系统、可以与无线通信系统的网络侧进行通信，或者通过无线通信系统与其它设备进行通信的设备都可以是本申请实施例中的通信设备，譬如，智能交通中的终端、汽车或RSU、智能家居中的家用设备、智能电网中的电力抄表仪器、电压监测仪器、环境监测仪器、智能安全网络中的视频监控仪器、收款机等等。通信设备可以是静态固定的，也可以是移动的。
下面结合上述通信系统，对本申请实施例提供的通信方法进行说明。
在NR SL中，网络侧设备，如基站为UE的SL通信配置资源池，一个资源池为一段时频资源的集合。UE在SL链路上进行通信的资源是从预配置或者基站侧配置的资源池中 确定的。具体的，Tx UE从网络侧设备获取在SL链路进行通信的传输资源有两种模式，分别是mode1和mode2。其中，上述预配置的资源可以是从核心网的网元获取的，也可以是预置在UE内的。
在mode1下，基站通过调度为Tx UE分配SL传输资源。在此模式下，当Tx UE有SL待传输数据时，通过Uu口向基站上报SL缓存状态报告(buffer status report，BSR)MAC CE，以告知基站当前Tx UE在PC5口的待传输数据的数据量。基站可以为Tx UE动态分配传输资源。
在mode2下，UE根据需要自己从预配置或者基站配置的资源池中选择传输资源，不需要基站进行调度。UE确定的SL资源是基站配置的(如通过RRC信令配置或者系统信息块(system information block，SIB)配置)，或者预配置的。这里所说的预配置可以是从核心网的网元获取，也可以是预置在UE内的。
在mode2下，TX UE进行一次资源选择，会为一个传输，如一个TB、一个MAC PDU等，选择至少一个资源(通常为1个到3个资源)，至少一个资源用于新传或者重传该传输。TX UE可以选择至少一个资源中的某一个资源发送该传输，那么，当前发送该传输的资源就是当前传输资源，而在时域上，位于当前传输资源之后的资源则为预留资源，预留资源是为重传该传输预留的资源。举例来说，图3为本申请实施例中的一个传输对应的至少一个资源的示意图，参见图3所示，TX UE为一个传输选择了3个资源，即S1、S2以及S3，如果TX UE在S1上发送该传输，那么，S1就是当前传输资源，S2和S2即为该传输对应的2个预留资源。
在本申请实施例中，第一通信设备在第一传输对应的一个资源上接收第一传输后，第一通信设备需要判断在侧行链路上是否存在用于重传第一传输的预留资源。那么，第一通信设备可以执行如下步骤。
图4为本申请实施例中的第一通信设备侧通信方法的流程示意图，参见图4所示，该方法包括：
S401：第二通信设备向第一通信设备发送第一传输；
第二通信设备(TX UE)为第一传输选择的至少一个资源中第一资源上发送第一传输，此时，第二通信设备可以初传第一传输，也可以重传第一传输。其中，第一传输可以为一个TB、一个MAC PDU，当然还可以为其他，本申请实施例不做具体限定。
S402：第一通信设备判断在侧行链路上是否存在用于重传第一传输的预留资源；若否，执行S403，若是，执行S404；
第一通信设备(RX UE)在接收第一资源上收到(可以理解为刚收到或者完成接收)第一传输后，判断第一资源之后是否存在用于重传第一传输的至少一个预留资源，也就是判断在侧行链路上是否存在用于重传第一传输的预留资源。若在第一资源之后还存在至少一个预留资源，则第一通信设备可以确定在侧行链路上存在用于重传第一传输的预留资源，进而执行S104；反之，则第一通信设备可以确认在侧行链路上不存在用于重传第一传输的预留资源，进而执行S103。
在本申请实施例中，若第二通信设备在S101中向第一通信设备传输第一传输为初传第一传输时，第二通信设备还可以向第一通信设备发送第一控制信息，该第一控制信息用于指示第一传输对应的至少一个资源的资源位置，那么，当第一通信设备收的到该第一控 制信息后，便可以根据第一控制信息的指示判断在第一资源之后是否还存在至少一个预留资源，即判断在侧行链路上是否存在用于重传第一传输的预留资源。
可选的，上述第一控制信息可以为SCI。那么，第一通信设备可以根据SCI的指示来判断在侧行链路上是否存在用于重传第一传输的预留资源。当然，第一控制信息还可以为其他信息，本申请实施例不做具体限定。
在本申请实施例中，第一通信设备可以通过判断用于接收第一传输的资源是否为至少一个资源中的最后一个资源，来判断侧行链路上是否存在用于重传第一传输的预留资源。例如，仍参见图3所示，假设第一通信设备在S3上收到第一传输，那么，第一通信设备可以确定S3为S1至S3这三个资源中的最后一个资源，在S3之后是不存在用于重传第一传输的资源的，即在侧行链路上不存在用于重传第一传输的预留资源，反之，在侧行链路上存在用于重传第一传输的预留资源。由此可见，如果用于传输第一传输的资源为至少一个资源中的最后一个资源，则表明在侧行链路上不存在用于重传第一传输的预留资源，反之，则表明在侧行链路上存在用于重传第一传输的预留资源。
在一些可能的实施方式中，第一通信设备还可以通过判断用于接收第一传输的资源是否为至少一个资源中的第一个资源，来判断侧行链路上是否存在用于重传第一传输的预留资源。例如，仍参见图3所示，假设第一通信设备在S1上收到第一传输，那么，第一通信设备可以确定S1为S1至S3这三个资源中的第一个资源，在S1之后是存在用于重传第一传输的资源，如S2、S3，即在侧行链路上存在用于重传第一传输的预留资源，反之，在侧行链路上不存在用于重传第一传输的预留资源。由此可见，如果用于接收第一传输的资源为至少一个资源中的第一个资源，则表明在侧行链路上存在用于重传第一传输的预留资源，反之，则表明在侧行链路上不存在用于重传第一传输的预留资源。
S403：第一通信设备启动第一定时器，和/或停止第二定时器；
当第一通信设备确定在侧行链路上不存在用于重传第一传输的预留资源，和/或用于接收第一传输的资源为至少一个资源中的最后一个资源时，第一通信设备启动第一定时器。可选的，第一通信设备还可以在启动第一定时器的同时停止第二定时器，也可以在不同时间点分别启动第一定时器和第二定时器。
需要说明的是，在本申请实施例中，“当…时”仅用于表示步骤的执行条件，对步骤的执行时机不做限定，也可以理解为“如果”或者“若”。
在一些可能的实施例中，本申请实施例所述的第一定时器用于指示收到重传授权前的时长，如第一定时器用于指示通信设备收到重传授权前的最小时长，可以理解为通信设备期望在收到重传授权前所等待的时长的最小值；第二定时器用于指示收到重传的时长，如第二定时器用于指示通信设备收到重传的最大时长，可以理解为通信设备期望收到重传所监听的时长的最大值。可选的，第一定时器和第二定时器与第一传输对应的HARQ进程对应，也就是说，第一通信设备是针对第一传输对应的HARQ进程启动第一定时器，和/或停止第二定时器。
在实际应用中，为了保证数据的收发，发送端设备和接收端设备在设置定时器时，定时器的时长配置一致，也就是说，第一通信设备的第一定时器与第二通信设备的第一定时器的时长相同，第一通信设备的第二定时器与第二通信设备的第二定时器的时长相同；当然，考虑到第一通信设备在收到第一传输后需要进行解析，可能需要n个符号，那么，第 二通信设备的第一定时器的时长可以比第一通信设备的第一定时器的时长长n个符号，第一通信设备的第二定时器与第二通信设备的第二定时器的时长相同，n为正整数；当然，第二通信设备的第二定时器的时长也可以比第一通信设备的第二定时器的时长长n个符号，第一通信设备的第一定时器与第二通信设备的第一定时器的时长相同，n为正整数。
在实际应用中，第一定时器可以为drx-sl-HARQ-RTT-Timer，第二定时器可以为drx-sl-Retransmission-Timer。当然，第一定时器和第二定时器还可以为其他定时器，本申请实施例不作具体限定。
S404：第一通信设备停止第二定时器。
当第一通信设备确定在侧行链路上存在用于重传第一传输的预留资源，和/或用于接收第一传输的资源为至少一个资源中的第一个资源时，第一通信设备停止第二定时器，使得第一通信设备不用监听第一传输对应的HARQ进程所关联的SCI，节省功耗。
在本申请实施例中，第一通信设备在执行S403时还可以先向第二通信设备发送第一传输对应的HARQ反馈，也就是对第一传输对应的HARQ反馈，然后在HARQ反馈发送完毕后，启动第一定时器，和/或停止第二定时器。
可选的，第一通信设备可以在发送完HARQ反馈后立即启动第一定时器，和/或停止第二定时器；第一通信设备也可以在发送完HARQ反馈后的第一个符号启动第一定时器。当然，第一通信设备还可以在发送完HARQ反馈后的第q个符号启动定时器，q为正整数，本申请实施例不做具体限定。
在一些可能的实施方式中，第一通信设备需要向第二通信设备发送第一传输对应的HARQ反馈，那么，第一通信设备先要确定第一传输对应的HARQ反馈属性是否为使能(enable)，只有第一传输对应的HARQ反馈属性为enable，第一通信设备才能够对第一传输进行HARQ反馈。
在实际应用中，网络侧设备、第一通信设备或者第二通信设备在为第一通信设备配LCH时，会为LCH配置HARQ反馈属性，HARQ反馈属性用于指示LHC是否支持HARQ反馈。相同HARQ反馈属性的LCH才能被封装在一个传输中。那么，第一传输对应的HARQ反馈属性是指封装在第一传输中的LCH的HARQ反馈属性。
进一步地，第一通信设备在执行完S403或者S404之后，还可以执行S405：当第一定时器超时时，若第一传输未成功解码，则第一通信设备启动第二定时器，监听第一传输对应的HARQ进程所关联的SCI，等待第一传输重传。
针对上述过程，第一通信设备在停止第二定时器后，第一通信设备可以不用一直监听使第一传输对应的HARQ进程所关联的SCI，而是根据第一控制信息所指示的资源位置，在相应的资源上接收第一传输的重传，节省功耗。
容易理解的，由于第一通信设备和第二通信设备是对称的，那么，对应于上述过程，第二通信设备还可以执行下述步骤。
图5为本申请实施例中的第二通信设备侧通信方法的流程示意图，参见图5所示，该方法可以包括：
S501：第二通信设备判断在侧行链路上是否存在用于重传第一传输的预留资源；若否，执行S502，若是，执行S503；
第二通信设备需要向第一通信设备发送第一传输，或者已经向第一通信设备发送第一 传输时，第二通信设备根据其为第一传输选择或重选的至少一个资源判断在侧行链路上是否存在用于重传第一传输的预留资源。若不存在用于重传第一传输的预留资源，则执行S502，反之执行S503。
这里，S501具体判断步骤的执行过程可以参见上述实施例中对S402的描述，在此不再赘述。
S502：第二通信设备启动第一定时器，和/或停止第二定时器；
S503：第二通信设备停止第二定时器。
其中，第一定时器用于指示发送重传授权前的时长，第二定时器用于指示发送重传的时长。
当第二通信设备确定在侧行链路上存在用于重传第一传输的预留资源，和/或用于发送第一传输的资源为至少一个资源中的第一个资源时，第二通信设备停止第二定时器，不用监听第一传输对应的HARQ进程所关联的SCI，节省功耗。
在本申请实施例中，第二通信设备在执行S502时还可以先向第一通信设备发送第一传输，然后在第一传输发送完毕后，启动第一定时器，和/或停止第二定时器。或者，第二通信设备还可以在收到第一通信设备发送的HARQ反馈之后，启动第一定时器，和/或停止第二定时器。
那么，上述S502可以包括：第二通信设备在收到来自第一通信设备的HARQ反馈后，启动第一定时器；或，当第一通信设备不向第二通信反馈ACK或NACK时(即无HARQ，或HARQ未使能时)，考虑到第一通信设备还需要对第一传输进行解析，可能需要m个符号，所以，第二通信设备在发送第一传输后，延迟m个符号启动第一定时器，这里，m与上述实施例中的n可以相同，也可以不同；或，第二通信设备在发送第一传输后，启动第一定时器。这里，延迟可以理解为第二通信设备在发送第一传输后，等待m个符号再启动第一定时器。
进一步地，第一通信设备在执行完S502或者S503之后，还可以执行S504：当第一定时器超时后，第二通信设备启动第二定时器，监听PSCCH和/或PSSCH，等待第一传输重传。
在一些可能的实施方式中，与第一通信设备类似，由于第一通信设备需要向第二通信设备发送第一传输对应的HARQ反馈，那么，第二通信设备需要先确定第一传输对应的HARQ反馈属性为使能。
举例来说，参考图3所示，假设第二通信设备在一次资源选择时为第一传输选择了3个资源，分别为S1、S2和S3，其中，S1可以为用于初传第一传输的资源，也可以为用于重传第一传输的资源，S2和S3可以为用于重传第一传输的资源。如果第二通信设备在S3上向第一通信设备发送第一传输(重传)，此时，由于S3为3个资源中的最后一个资源，那么，第一通信设备和第二通信设备可以确定在侧行链路上不存在用于重传的第一传输的预留资源，然后，第一通信设备和第二通信设备可以启动第一定时器，和/或停止第二定时器，使得第一通信设备可以不用一直监听第一传输对应的HARQ进程所关联的SCI，节省功耗。而如果第二通信设备在S1上向第一通信设备发送第一传输(可以为初传，也可以为重传)，此时，由于S1为3个资源中的第一个资源，那么，第一通信设备和第二通信设备可以确定在侧行链路上还存在用于重传的第一传输的预留资源，如S2和/或S3，然后， 第一通信设备和第二通信设备就可以停止第二定时器，使得第一通信设备可以不用一直监听第一传输对应的HARQ进程所关联的SCI，节省功耗。
在本申请实施例中，在侧行链路中，第一通信设备和第二通信设备通过第一定时器和第二定时器共同控制第一通信设备的数据接收，使得第一通信设备可以不用一直监听第一传输对应的HARQ进程关联的SCI，节省功耗。
在本申请其他实施例中，还提供一种通信方法，图6为本申请实施例中的第三通信设备侧通信方法的流程示意图，参见图6所示，该方法可以包括：
S601：第四通信设备在侧行链路上传输第二传输时，向第三通信设备发送第二控制信息；
其中，该第二控制信息用于指示第二传输对应的至少一个资源的在侧行链路上的位置，进而指示侧行链路上是否存在用于重传第二传输的至少一个预留资源。第二控制信息可以为SCI。
在本申请实施例中，上述第二传输可以为TB、MAC PDU、PSSCH等。
S602：第三通信设备根据第二控制信息判断侧行链路上是否存在用于重传第二传输的至少一个预留资源，若是，执行S603，若否，执行S604；
第三通信设备执行S602的过程可以参见上述实施例中对S402的描述，在此不再赘述。
S603：第三通信设备将第三定时器的时长配置为第一时长，和/或将第四定时器的时长配置为第二时长；
可选的，第三通信设备可以根据第一资源与第二资源之间的时域间隔确定的第三时长；和/或，第三通信设备根据第三通信设备从收到第二传输到确定反馈应答信息之间的时间差确定第二时长。
这里，第二传输对应的至少一个资源中，第一资源是当前用于传输第二传输的资源，可以是用于初传第二传输，也可以是用于重传第二传输；第二资源为至少一个预留资源中与第一资源在时域上最近的资源，第二资源用于重传第二传输。
在一些可能的实施方式中，上述第三定时器的时长，即第一时长可以确定为gap-k，这里gap为时域间隔，k为第三通信设备从收到来自第四通信设备的第二传输到确定反馈应答信息之间的时间差或者完处理第二传输的时长。可选的，k为上述时间差的上限值，可以取2或3，当然，k还可以取其他值，本申请实施例不做具体限定。
在一些可能的实施方式中，第四定时器的时长，即第二时长可以确定为k+s或k-1+s个符号。其中，k为第三通信设备从收到第二传输到确定反馈应答信息之间的时间差，s为当前SCS配置的一个时隙中包含的符号数，如14个符号，如此，第三通信设备就不会过晚启动第四定时器，避免错过重传。
需要说明的是，本申请实施例所述的第三定时器与第一定时器含义相同，具体描述参见上述实施例对于第一定时器的描述，第四定时器与第二定时器含义相同，具体描述参见上述实施例对于第二定时器的描述。
当第三通信设备执行S603配置第三定时器的时长之后，上述方法还可以包括：第三通信设备启动第三定时器，和/或停止第四定时器。
在本申请一个或者多个实施例中，第三通信设备启动第三定时器的步骤可以包括：第三通信设备在向第四通信设备发送第二传输对应的HARQ反馈后立即启动第三定时器，或 者，第三通信设备在向第四通信设备发送第二传输对应的HARQ反馈后的第一个符号启动第三定时器，或者，第三通信设备还可以在配置好第三定时器的时长后启动第三定时器，或者，第三通信设备收到第二传输后启动第三定时器，当然，还可以存在其他方式启动第三定时器。在第三通信设备启动第三定时器的过程下面的实施例中不再赘述。
可以理解的，第三通信设备在配置完第四定时器后，第三通信设备还可以启动该第四定时器。例如，当第三定时器超时，和/或第三通信设备对第四通信设备发送的第二传输未成功解码时，第三通信设备启动第四定时器。
在本申请其他实施例中，第三定时器在执行S602确定在在侧行链路上不存在用于重传第二传输的多个预留资源之后，可以执行S604：第三通信设备将第三定时器配置为第三时长，和/或，第三通信设备将第四定时器配置为第四时长；
可选的，第三通信设备将第三定时器的时长和/或第四定时器的时长配置为已配置时长。
在实际应用中，第一时长的值和第三时长的值可以相同，也可以不同；第二时长的值和第四时长的值可以相同，也可以不同，本申请实施例不做具体限定。
这里，已配置时长是指在第三通信设备和第四通信设备通信的过程中为第三定时器和第四定时器配置的时长。也就是说，如果在侧行链路上不存在用于重传第二传输的预留资源，第三通信设备就无法如上述方式配置第三定时器和第四定时器的时长，而是以已配置时长来为第三定时器和/或第四定时器配置时长。
在一些可能的实施方式中，在第三通信设备将第三定时器的时长和/定时器的时长配置为已配置时长之后，第三通信设备可以启动第三定时器，和/或停止第四定时器。这里，第三通信设备可以在向第四通信设备发送第二传输对应的HARQ反馈后启动第三定时器。
可选的，第三通信设备确定第二传输对应的HARQ反馈属性为使能。
容易理解的，由于第三通信设备和第四通信设备是对称的，那么，对应于上述过程，第二通信设备还可以执行下述步骤。
图7为本申请实施例中的第四通信设备侧通信方法的流程示意图，参见图7所示，该方法可以包括：
S701：第四通信设备在侧行链路上传输第二传输时，向第三通信设备发送第二控制信息；
其中，该第二控制信息用于指示第二传输对应的至少一个资源的在侧链路上的位置。第二控制信息可以为SCI。
S702：第四通信设备判断侧行链路上是否存在用于重传第二传输的至少一个预留资源，若是，执行S703，若否，执行S704；
S703：第四通信设备根据多个预留资源中的第一资源与第二资源之间的时域间隔配置第三定时器的时长。
在S702之后，还可以执行S705：第四通信设备根据第三通信设备从收到来自第四设备的第二传输到确定反馈应答信息之间的时间差配置第四定时器的时长。
这里，第三通信设备从收到来自第四设备的第二传输到确定反馈应答信息之间的时间差可以由第三通信设备告知第四通信设备，或者是第三通信设备和第四通信设备事先协商好的，当然，也可以能是协议规定的，本申请实施例不做具体限定。
在本申请实施例中，第四通信设备在配置好第三定时器和第四定时器之后，第四通信 设备还可以在接收第三通信设备发送的第二传输对应的HARQ反馈后启动第三定时器，和/或停止第四定时器。
需要说明的是，在本申请一个或者多个实施例中，第四通信设备启动第三定时器的步骤可以包括第四通信设备在接收第三通信设备发送对的第二传输对应的HARQ反馈后立即启动第三定时器，或者，第四通信设备在接收第二传输对应的HARQ反馈后的第一个符号启动第三定时。在下面的实施例中不再赘述。
可选的。当第三定时器超时时，第四通信设备启动第四定时器。
S704：第四通信设备将第三定时器的时长和/或第四定时器的时长配置为已配置时长。
需要说明的是，上述第四通信设备配置第三定时器和第四定时器的过程可以参见上述实施例中第三通信设备配置第三定时器和第四定时器的过程，不再赘述。
在一些可能的实施方式中，第四通信设备在配置好第三定时器和第四定时器后，可以使用这两个定时器了，那么，第四通信设备可以在接收来自第三通信设备的HARQ反馈后启动第三定时器，和/或停止第四定时器。
举例来说，仍参见图3所示，假设第四通信设备在一次资源选择时为第二传输选择了3个资源，分别为S1、S2和S3，其中，S1可以为用于初传第二传输的资源，也可以为用于重传第二传输的资源，S2和S3可以为用于重传第二传输的资源。如果第四通信设备在S2上向第三通信设备发送第二传输(重传)，此时，由于S2为3个资源中的第二个资源，那么，第三通信设备和第四通信设备可以确定在侧行链路上存在用于重传的第二传输的预留资源，然后，第三通信设备和第四通信设备可以选择S2与离S2最近的资源S3之间的时间间隔来配置第三定时器的时长，和/或，第三通信设备从收到来自第四设备的第二传输到确定反馈应答信息之间的时间差配置第四定时器，在第三定时器和第四定时器配置完成之后，第三通信设备科第四通信设备就可以启动第三定时器，和/或停止第四定时器，此时，第三通信设备不用监听第二传输对应的HARQ进程所关联的SCI，节省功耗。而如果第四通信设备在S3上向第三通信设备发送第二传输(重传)，此时，由于S3为3个资源中的最后一个资源，那么，第三通信设备和第四通信设备可以确定在侧行链路上不存在用于重传的第一传输的预留资源，然后，第三通信设备和第四通信设备可以停止第二定时器，此时，第三通信设备不用监听第二传输对应的HARQ进程所关联的SCI，节省功耗。
在本申请实施例中，在侧行链路中，第三通信设备和第四通信设备通过第三定时器和第四定时器共同控制第三通信设备的数据接收，使得第三通信设备可以不用一直监听第二传输对应的HARQ进程所关联的SCISCI，节省功耗。
在本申请其他实施例中，本申请实施例还提供一种通信方法，图8为本申请实施例中的第五通信设备侧通信方法的流程示意图，参见图8所示，该方法可以包括：
S801：第六通信设备点第五通信设备发送第三传输；
在一些可能的实施方式中，第六通信设备在初传第三传输时，还可以向第五通信设备发送第三控制消息，该第三控制消息可以为SCI。第三控制消息可以用于指示第六通信设备对第三传输是否采用盲重传。
S802：第五通信设备判断侧行链路上发送的第三传输对应的HARQ反馈属性是否为非使能，若是，则执行S803，此时，第五通信设备并不提前知道盲重传的位置；
在本申请实施例中，第五通信设备除了判断短第三传输对应的HARQ反馈属性是否为 非使能，还可以确定第五通信设备对第三传输是否成功解码，若该HARQ反馈属性为非使能，以及第五通信设备对第三传输未成功解码，执行S803，此时，第五通信设备不向第六通信设备进行HARQ反馈，第六通信设备就可以对第三传输进行盲重传。
S803：第五通信设备启动第五定时器。
容易理解的，由于第五通信设备和第六通信设备是对称的，那么，对应于上述过程，第六通信设备还可以执行下述步骤。
在本申请其他实施例中，本申请实施例还提供一种通信方法，图9为本申请实施例中的第六通信设备侧通信方法的流程示意图，参见图9所示，该方法可以包括：
S901：第六通信设备向第五通信设备发送第三传输；
在一些可能的实施方式中，第六通信设备在初传第三传输时，还可以向第六通信设备发送第三控制消息，该第三控制消息可以为SCI。第三控制消息可以用于指示第六通信设备对第三传输是否采用盲重传。
S902：第六通信设备判断侧行链路上发送的第三传输对应的HARQ反馈属性是否为非使能，若是，则执行S903；
在本申请实施例中，若该HARQ反馈属性为非使能，第五通信设备不向第六通信设备进行HARQ反馈，第六通信设备就可以对第三传输进行盲重传。
S903：第六通信设备启动第五定时器。
在本申请实施例中，当第六通信设备确定在侧行链路上发送的第三传输对应的HARQ反馈属性为非使能时，第六通信设备在向第五通信设备发送第三传输后，延迟h个符号启动第五定时器。这里，延迟可以理解为第二通信设备在发送第一传输后，等待m个符号再启动第一定时器，从而避免了错过重传的风险。
在一些可能的实施方式中，上述方法还包括：当第五定时器超时后，第六通信设备启动第六定时器。
需要说明的是，上述一个或多个实施例中，第二传输以及第三传输可以参见一个或者多个实施例中对第一传输的描述。第一通信设备、第三通信设备以及第五通信设备作为发送端设备，第二通信设备、第四通信设备以及第六通信设备作为接收端设备。发送端设备的实施例与接收端设备的实施例可以互相参照，本申请实施例对此不做具体限定。
基于相同的发明构思，本申请实施例提供一种通信装置，该通信装置可以为第一通信设备中的芯片或者片上系统，还可以为第一通信设备中用于实现上述任一实施例所述方法的功能模块。该芯片或者片上系统包括存储器，存储器中存储有指令，当指令被片上系统或者芯片调用的时候，执行上述方法。图10为本申请实施例中的通信装置的一种结构示意图，参见图10所示，该通信装置1000可以包括：处理模块1001，用于当确定在侧行链路上不存在用于重传第一传输的预留资源时，启动第一定时器，和/或停止第二定时器；或，当确定在侧行链路上存在用于重传第一传输的预留资源，和/或用于传输第一传输的资源为第一传输对应的至少一个资源中的第一个资源时，停止第二定时器。
上述第一定时器用于指示收到重传授权前的时长，第二定时器用于指示收到重传的时长。
在一些可能的实施方式中，上述装置1000还可以包括：发送模块1002，用于在侧行链路上向第二通信设备发送与第一传输对应的HARQ反馈；接收模块1003，用于接 收第二通信设备发送的第一传输；相应的，处理模块，用于在发送模块发送与第一传输对应的HARQ反馈后启动第一定时器；或，在发送模块发送HARQ反馈后的第一个符号启动第一定时器。
在一些可能的实施方式中，发送模块，用于在侧行链路上向第二通信设备发送与第一传输对应的HARQ反馈，处理模块还用于在发送模块发送与第一传输对应的HARQ反馈后停止第二定时器；或，在发送模块发送HARQ反馈后的第一个符号上停止二定时器；或，在接收模块收到所述第一传输后，启动所述第一定时器。
在一些可能的实施方式中，处理模块，还用于当第一定时器超时，和/或对第二通信设备发送的第一传输未成功解码时，启动第二定时器。
在一些可能的实施方式中，处理模块，还用于在启动第一定时器之前，确定第一传输对应的HARQ反馈属性为使能。
在一些可能的实施方式中，上述装置1000还包括：接收模块1003，用于接收自第二通信设备的第一控制信息；处理模块，用于根据第一控制信息确定是否存在用于重传第一传输的预留资源，和/或用于传输所述第一传输的资源不是所述第一传输对应的至少一个资源中的第一个资源。
需要说明的是，上述发送模块可以为发送接口、发送电路或者发送器等；上述接收模块可以为接收接口、接收电路或者接收器等；上述处理模块可以为一个或者多个处理器。
基于相同的发明构思，本申请实施例提供一种通信装置，该通信装置可以为第二通信设备中的芯片或者片上系统，还可以为第二通信设备中用于实现上述任一实施例所述方法的功能模块。该芯片或者片上系统包括存储器，存储器中存储有指令，当指令被片上系统或者芯片调用的时候，执行上述方法。仍参考图10所示，该通信装置1000可以包括：处理模块1001，用于当确定在侧行链路上不存在用于重传第一传输的预留资源时，启动第一定时器，和/或停止第二定时器，第一定时器用于指示发送重传授权前的时长，第二定时器用于指示发送重传的时长；或，当确定在侧行链路上存在用于重传第一传输的预留资源，和/或用于传输第一传输的资源为第一传输对应的至少一个资源中的第一个资源时，停止第二定时器，第一传输对应的至少一个预留资源是通过对第一传输进行资源选择得到的。
在一些可能的实施方式中，处理模块，还用于当第一定时器超时时，启动第二定时器。
在一些可能的实施方式中，上述装置还包括：接收模块1003和发送模块1002，接收模，用于收到第一通信设备发送的第二传输对应的HARQ反馈；处理模块，用于在接收模块收到HARQ反馈后，启动第一定时器；或，发送模块，用于在侧行链路上向第一通信设备发送第一传输；处理模块，用于在发送模块在发送第一传输后，延迟m个符号启动第一定时器，m为正整数；或，在发送模块发送第一传输后，启动第一定时器。
在一些可能的实施方式中，上述装置还包括：发送模块，用于在侧行链路上向第一通信设备发送第一传输；处理模块，用于在发送模块发送第一传输后，停止第二定时器。
在一些可能的实施方式中，处理模块，还用于在启动第一定时器之前，确定第一 传输对应的HARQ反馈属性为使能。
需要说明的是，上述发送模块可以为发送接口、发送电路或者发送器等；上述接收模块可以为接收接口、接收电路或者接收器等；上述处理模块可以为一个或者多个处理器。
基于相同的发明构思，本申请提供一种通信装置，该通信装置可以为第三通信设备中的芯片或者片上系统，还可以为第三通信设备中用于实现上述任一实施例所述方法的功能模块。该芯片或者片上系统包括存储器，存储器中存储有指令，当指令被片上系统或者芯片调用的时候，执行上述方法。仍参考图10所示，该通信装置1000可以包括：处理模块1001，用于当确定侧行链路上存在用于重传第二传输的至少一个预留资源时，将第三定时器的时长配置为第一时长，和/或将第四定时器的时长配置为第二时长；当侧行链路上不存在用于重传第二传输的至少一个预留资源时，第三通信设备将第三定时器的时长配置为第三时长，和/或将第四定时器的时长配置为第四时长；
其中，第三定时器用于指示发送重传授权前的时长，第四定时器用于指示发送重传的时长。
可选的，处理模块，用于根据第一资源与至少一个预留资源中的第二资源之间的时域间隔确定第一时长，和/或，处理模块，用于根据第三通信设备从收到第二传输到确定反馈应答信息之间的时间差确定第二时长，其中，第一资源用于传输第二传输，第二资源为至少一个预留资源中与第一资源在时域上最近的资源。
在本申请中，上述第二传输可以为TB、MAC PDU等。
可选的，第三时长为已配置时长，和/或，第四时长为已配置时长。
在一些可能的实施方式中，第一时长配置为gap-k；gap为时域间隔，k为第三通信设备从收到来自第四通信设备的第二传输到确定反馈应答信息之间的时间差。
在一些可能的实施方式中，k取2或3。
在一些可能的实施方式中，处理模块，还用于在将第三定时器的时长配置为第三时长，和/或将第四定时器的时长配置为第四时长之后，启动第三定时器，和/或停止第四定时器。
在一些可能的实施方式中，第二时长为k+s或k-1+s个符号，k为时间差，s为一个时隙中包含的符号数。
在一些可能的实施方式中，处理模块，还用于在将第四定时器的时长配置为第二时长，和/或将第四定时器的时长配置为第四时长之后，启动第四定时器。
在一些可能的实施方式中，处理模块，还用于当第三定时器超时，和/或对第二传输未成功解码时，启动第四定时器。
在一些可能的实施方式中，处理模块，用于在将第三时长确定为已配置时，和/或将第四时长确定为已配置时长之后，启动第三定时器，和/或停止第四定时器。。
在一些可能的实施方式中，发送模块1002，还用于在侧行链路上向第四通信设备发送第二传输对应的HARQ反馈；处理模块，还用于在发送模块发送第二传输对应的HARQ反馈后启动第三定时器。
在一些可能的实施方式中，处理模块，还用于在发送模块发送第二传输对应的HARQ反馈后的第一个符号启动第三定时器。
在一些可能的实施方式中，处理模块，还用于在配置第三定时器的时长之前，确定第二传输对应的HARQ反馈属性为使能。
基于第九方面，在一些可能的实施方式中，装置1000还包括：接收模块1003，用于收到的来自所述第四通信设备的第二控制信息；处理模块，用于根据第二控制信息确定侧行链路上是否存在用于重传第二传输的至少一个预留资源。
需要说明的是，上述发送模块可以为发送接口、发送电路或者发送器等；上述接收模块可以为接收接口、接收电路或者接收器等；上述处理模块可以为一个或者多个处理器。
基于相同的发明构思，本申请实施例提供一种通信装置，该通信装置可以为第四通信设备中的芯片或者片上系统，还可以为第四通信设备中用于实现上述任一实施例所述方法的功能模块。该芯片或者片上系统包括存储器，存储器中存储有指令，当指令被片上系统或者芯片调用的时候，执行上述方法。仍参考图10所示，该通信装置1000可以包括：处理模块1001，用于将第三定时器的时长配置为第一时长，和/或将第四定时器的时长配置为第二时长；或者，处理模块，用于当侧行链路上不存在用于重传第二传输的至少一个预留资源时，将第三定时器的时长配置为第三时长，和/或将第四定时器的时长配置为第四时长；
其中，第三定时器用于指示发送重传授权前的时长，第四定时器用于指示发送重传的时长。
可选的，处理模块，用于根据第一资源与至少一个预留资源中的第二资源之间的时域间隔确定第一时长，和/或，处理模块，用于根据第三通信设备从收到第二传输到确定反馈应答信息之间的时间差确定第二时长，其中，第一资源用于传输第二传输，第二资源为至少一个预留资源中与第一资源在时域上最近的资源。
在本申请中，上述第二传输可以为TB、MAC PDU等。
可选的，第三时长为已配置时长，和/或，第四时长为已配置时长。
在一些可能的实施方式中，第一时长为gap-k；gap为时域间隔，k为第三通信设备从收到来自第四设备的第二传输到确定反馈应答信息之间的时间差。
在一些可能的实施方式中，k取2或3。
在一些可能的实施方式中，第二时长为k+s或k-1+s个符号，k为时间差，s为一个时隙中包含的符号数。
在一些可能的实施方式中，上述装置1000还包括：接收模块1003，用于接收第三通信设备发送的第二传输对应的HARQ反馈处理模块；处理模块，还用于当确定在侧行链路上存在用于重传第二传输的预留资源时，在接收模块接收HARQ反馈后启动第三定时器，和/或停止第四定时器。
在一些可能的实施方式中，处理模块，还用于当第三定时器超时时，启动第四定时器。
在一些可能的实施方式中，接收模块，用于接收第三通信设备发送的第二传输对应的HARQ反馈处理模块；处理模块，还用于在将第三定时器的时长配置为第三时长，和/或将第四定时器的时长配置为第四时长之后，在接收来自第三通信设备的第二传输对应的HARQ反馈后启动第三定时器，和/或停止第四定时器。
在一些可能的实施方式中，处理模块，用于在接收模块接收第二传输对应的HARQ反馈后的第一个符号启动第三定时器。
在一些可能的实施方式中，处理模块，还用于在配置第三定时器的时长之前，确定第二传输对应的HARQ反馈属性为使能。
基于第十方面，在一些可能的实施方式中，发送模块，还用于向第三通信设备发送第二控制信息，第二控制信息用于指示侧行链路上是否存在用于重传第二传输的至少一个预留资源。
需要说明的是，上述发送模块可以为发送接口、发送电路或者发送器等；上述接收模块可以为接收接口、接收电路或者接收器等；上述处理模块可以为一个或者多个处理器。
基于相同的发明构思，本申请实施例提供一种通信装置，该通信装置可以为第五通信设备中的芯片或者片上系统，还可以为第五通信设备中用于实现上述任一实施例所述方法的功能模块。该芯片或者片上系统包括存储器，存储器中存储有指令，当指令被片上系统或者芯片调用的时候，执行上述方法。仍参考图10所示，该通信装置1000可以包括：接收模块1103，用于接收第六通信设备在侧行链路上发送的第三传输；处理模块1001，用于当确定第三传输对应的HARQ反馈属性为非使能，和/或对第三传输未成功解码时，启动第五定时器，第五定时器用于指示收到重传授权前的时长。
在一些可能的实施方式中，处理模块，用于当第五定时器超时后，启动第六定时器，第六定时器用于指示收到重传的时长。
在一些可能的实施方式中，处理模块，用于当确定第三传输对应的HARQ反馈属性为非使能时，确定第六通信设备对第三传输采用盲重传。
在一些可能的实施方式中，接收模块，用于接收第六通信设备发送对的第三控制信息；处理模块，用于根据接收的第三控制信息确定第六通信设备对第三传输采用盲重传，第三控制信息为第六通信设备在侧行链路上发送的第三传输对应的控制信息。
需要说明的是，上述接收模块可以为接收接口、接收电路或者接收器等；上述处理模块可以为一个或者多个处理器。
基于相同的发明构思，本申请实施例提供一种通信装置，该通信装置可以为第六通信设备中的芯片或者片上系统，还可以为第六通信设备中用于实现上述任一实施例所述方法的功能模块。该芯片或者片上系统包括存储器，存储器中存储有指令，当指令被片上系统或者芯片调用的时候，执行上述方法。仍参考图10所示，该通信装置1000可以包括：发送模块1002，用于在侧行链路上向第五通信设备发送第三传输；处理模块1001，用于当确定第三传输对应的HARQ反馈属性为非使能时，在向第五通信设备发送第三传输后，延迟h个符号启动第五定时器，第五定时器用于指示发送重传授权前的时长。
在一些可能的实施方式中，处理模块，还用于当第五定时器超时后，第六通信设备启动第六定时器，第六定时器用于指示发送重传的时长。
在一些可能的实施方式中，处理模块，还用于当确定第三传输对应的HARQ反馈属性为非使能时，确定对第三传输采用盲重传。
需要说明的是，上述发送模块可以为发送接口、发送电路或者发送器等；上述处理模块可以为一个或者多个处理器。
基于相同的发明构思，本申请实施例提供一种通信装置，图11为本申请实施例中的通信装置的另一种结构示意图，参见图11所示，该通信装置1100可以包括：处理器1101、存储器1101和通信接口1103；处理器1101与存储器1102耦合，处理器1101被配置为读取并执行存储器1102中的指令，以实现上述任一实施例中第一通信设备、第三通信设备施例以及第五通信设备所执行的通信方法；通信接口1103，被配置为与第二通信设备、第四通信设备施例或者第六通信设备通信。。
基于相同的发明构思，本申请实施例提供一种通信装置，仍参见图11所示，该通信装置1100可以包括：处理器1101、存储器1102和通信接口1103；处理器1101与存储器1102耦合，处理器1101被配置为读取并执行存储器1102中的指令，以实现上述任一实施例中第二通信设备、第四通信设备施例以及第六通信设备所执行的通信方法；通信接口1103被配置为与第一通信设备、第三通信设备施例或者第五通信设备通信。
基于相同的发明构思，本申请实施例提供一种计算机可读存储介质，计算机可读存储介质存储有指令，当指令在计算机上运行时，用于执行如上述第一方面至第六方面及其任一种可能的实施方式所述的通信方法。
基于相同的发明构思，本申请实施例提供一种计算机程序或计算机程序产品，当计算机程序或计算机程序产品在计算机上被执行时，使得计算机实现如上述第一方面至第六方面及其任一种可能的实施方式所述的通信方法。
本领域技术人员能够领会，结合本文公开描述的各种说明性逻辑框、模块和算法步骤所描述的功能可以硬件、软件、固件或其任何组合来实施。如果以软件来实施，那么各种说明性逻辑框、模块、和步骤描述的功能可作为一或多个指令或代码在计算机可读媒体上存储或传输，且由基于硬件的处理单元执行。计算机可读媒体可包含计算机可读存储媒体，其对应于有形媒体，例如数据存储媒体，或包括任何促进将计算机程序从一处传送到另一处的媒体(例如，根据通信协议)的通信媒体。以此方式，计算机可读媒体大体上可对应于(1)非暂时性的有形计算机可读存储媒体，或(2)通信媒体，例如信号或载波。数据存储媒体可为可由一或多个计算机或一或多个处理器存取以检索用于实施本申请中描述的技术的指令、代码和/或数据结构的任何可用媒体。计算机程序产品可包含计算机可读媒体。
作为实例而非限制，此类计算机可读存储媒体可包括RAM、ROM、EEPROM、CD-ROM或其它光盘存储装置、磁盘存储装置或其它磁性存储装置、快闪存储器或可用来存储指令或数据结构的形式的所要程序代码并且可由计算机存取的任何其它媒体。并且，任何连接被恰当地称作计算机可读媒体。举例来说，如果使用同轴缆线、光纤缆线、双绞线、数字订户线(DSL)或例如红外线、无线电和微波等无线技术从网站、服务器或其它远程源传输指令，那么同轴缆线、光纤缆线、双绞线、DSL或例如红外线、无线电和微波等无线技术包含在媒体的定义中。但是，应理解，所述计算机可读存储媒体和数据存储媒体并不包括连接、载波、信号或其它暂时媒体，而是实际上针对于非暂时性有形存储媒体。如本文中所使用，磁盘和光盘包含压缩光盘(CD)、激光光盘、光学光盘、数字多功能光盘(DVD)和蓝光光盘，其中磁盘通常以磁性方式再现数据，而光盘利用激光以光学方式再现数据。以上各项的组合也应包含在计算机可读媒体的范围内。
可通过例如一或多个数字信号处理器(DSP)、通用微处理器、专用集成电路(ASIC)、现场可编程逻辑阵列(FPGA)或其它等效集成或离散逻辑电路等一或多个处理器来执行指令。 因此，如本文中所使用的术语“处理器”可指前述结构或适合于实施本文中所描述的技术的任一其它结构中的任一者。另外，在一些方面中，本文中所描述的各种说明性逻辑框、模块、和步骤所描述的功能可以提供于经配置以用于编码和解码的专用硬件和/或软件模块内，或者并入在组合编解码器中。而且，所述技术可完全实施于一或多个电路或逻辑元件中。
本申请的技术可在各种各样的装置或设备中实施，包含无线手持机、集成电路(IC)或一组IC(例如，芯片组)。本申请中描述各种组件、模块或单元是为了强调用于执行所揭示的技术的装置的功能方面，但未必需要由不同硬件单元实现。实际上，如上文所描述，各种单元可结合合适的软件和/或固件组合在编码解码器硬件单元中，或者通过互操作硬件单元(包含如上文所描述的一或多个处理器)来提供。
在上述实施例中，对各个实施例的描述各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上所述，仅为本申请示例性的具体实施方式，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，可轻易想到的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应该以权利要求的保护范围为准。

Claims (47)

  1. 一种通信方法，其特征在于，包括：
    当侧行链路上不存在用于重传第一传输的预留资源时，第一通信设备启动第一定时器，和/或停止第二定时器；或，
    当侧行链路上存在所述用于重传第一传输的预留资源，和/或用于传输所述第一传输的资源为所述第一传输对应的至少一个资源中的第一个资源时，所述第一通信设备停止所述第二定时器，所述第一传输对应的至少一个资源是通过对所述第一传输进行资源选择或重选得到的；
    其中，所述第一定时器用于指示收到重传授权前的时长，所述第二定时器用于指示接收重传的时长。
  2. 根据权利要求1所述的方法，其特征在于，所述第一通信设备启动第一定时器，包括：
    所述第一通信设备在侧行链路上向第二通信设备发送与所述第一传输对应的混合自动重传请求HARQ反馈后启动所述第一定时器；或，
    所述第一通信设备在发送所述HARQ反馈后的第一个符号启动所述第一定时器；或，
    所述第一通信设备在收到所述第一传输后，启动所述第一定时器。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一通信设备停止所述第二定时器，包括：
    所述第一通信设备在侧行链路上向第二通信设备发送与所述第一传输对应的HARQ反馈后停止所述第二定时器；或，
    所述第一通信设备在发送所述HARQ反馈后的第一个符号上停止所述二定时器。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述方法还包括：
    当所述第一定时器超时，和/或所述第一通信设备对所述第二通信设备发送的所述第一传输未成功解码时，所述第一通信设备启动所述第二定时器。
  5. 根据权利要求1至4所述的方法，其特征在于，所述第一通信设备的第一定时器与所述第二通信设备的第一定时器的时长相同，所述第一通信设备的第二定时器与所述第二通信设备的第二定时器的时长相同；或，
    所述第二通信设备的第一定时器的时长比所述第一通信设备的第一定时器的时长长n个符号，所述第一通信设备的第二定时器与所述第二通信设备的第二定时器的时长相同，n为正整数。
  6. 根据权利要求1至5任一项所述的方法，其特征在于，在所述第一通信设备启动所述第一定时器之前，所述方法还包括：
    所述第一通信设备确定所述第一传输对应的HARQ反馈属性为使能。
  7. 根据权利要求1至6任一项所述的方法，其特征在于，所述第一定时器和所述第二定时器与所述第一传输对应的HARQ进程对应。
  8. 根据权利要求1至7任一项所述的方法，其特征在于，所述方法还包括：
    所述第一通信设备接收来自第二通信设备的第一控制信息；
    所述第一通信设备根据所述第一控制信息，确定存在用于重传所述第一传输的预 留资源；和/或，用于传输所述第一传输的资源为所述第一传输对应的至少一个资源中的第一个资源；或者，
    所述第一通信设备根据所述第一控制信息，确定不存在用于重传所述第一传输的预留资源，和/或用于传输所述第一传输的资源不是所述第一传输对应的至少一个资源中的第一个资源。
  9. 一种通信方法，其特征在于，包括：
    当侧行链路上不存在用于重传第一传输的预留资源时，所述第二通信设备启动第一定时器，和/或停止第二定时器；或，
    当侧行链路上存在所述用于重传所述第一传输的预留资源，和/或用于传输所述第一传输的资源为所述第一传输对应的至少一个资源中的第一个资源时，所述第二通信设备停止所述第二定时器，所述第一传输对应的至少一个预留资源是通过对所述第一传输进行资源选择或重选得到的；
    其中，所述第一定时器用于指示发送重传授权前的时长，所述第二定时器用于指示发送重传的时长。
  10. 根据权利要求9所述的方法，其特征在于，所述方法还包括：
    当所述第一定时器超时时，所述第二通信设备启动所述第二定时器。
  11. 根据权利要求9或10所述的方法，其特征在于，所述第二通信设备启动第一定时器，包括：
    所述第二通信设备在收到第一通信设备发送的所述第一传输对应的混合自动重传请求HARQ反馈后，启动所述第一定时器；或，
    所述第二通信设备在发送所述第一传输后，延迟m个符号启动所述第一定时器，m为正整数；或，
    所述第二通信设备在发送所述第一传输后，启动所述第一定时器。
  12. 根据权利要求9至11任一项所述的方法，其特征在于，所述第二通信设备停止所述第二定时器，包括：
    所述第二通信设备在侧行链路上向第一通信设备发送所述第一传输后，停止所述第二定时器。
  13. 根据权利要求9至12任一项所述的方法，其特征在于，所述第二通信设备的第一定时器与所述第一通信设备的第一定时器的时长相同，所述第一通信设备的第二定时器与所述第一通信设备的第二定时器的时长相同；或，
    所述第二通信设备的第一定时器的时长比所述第一通信设备的第一定时器的时长长n个符号，所述第一通信设备的第二定时器与所述第一通信设备的第二定时器的时长相同，n为正整数。
  14. 根据权利要求9至13任一项所述的方法，其特征在于，在所述第二通信设备启动所述第一定时器之前，所述方法还包括：
    所述第二通信设备确定所述第一传输对应的HARQ反馈属性为使能。
  15. 根据权利要求9至14任一项所述的方法，其特征在于，所述第一定时器和所述第二定时器与所述第一传输对应的HARQ进程对应。
  16. 一种通信方法，其特征在于，包括：
    当侧行链路上存在用于重传第二传输的至少一个预留资源时，第三通信设备将第三定时器的时长配置为第一时长，和/或第三通信设备将第四定时器的时长配置为第二时长；或者，
    当侧行链路上不存在所述多个预留资源时，所述第三通信设备将第三定时器的时长配置为第三时长；和/或，所述第三通信设备将所述第四定时器的时长配置为的第四时长；
    其中，所述第三定时器用于指示收到重传授权前的时长，所述第四定时器用于指示收到重传的时长。
  17. 根据权利要求16所述的方法，其特征在于，所述方法还包括：
    所述第三通信设备根据第一资源与所述至少一个预留资源中的第二资源之间的时域间隔确定所述第一时长；和/或，所述第三通信设备根据所述第三通信设备从收到所述第二传输到确定反馈应答信息之间的时间差确定所述第四时长；
    其中，所述第一资源用于传输所述第二传输，所述第二资源为所述至少一个预留资源中与所述第一资源在时域上最近的资源。
  18. 根据权利要求16或17所述的方法，其特征在于，所述第一时长为gap-k；所述gap为所述时域间隔，k为所述第三通信设备从收到来自第四通信设备的所述第二传输到确定反馈应答信息之间的时间差。
  19. 根据权利要求18所述的方法，其特征在于，k取2或3。
  20. 根据权利要求16至19任一项所述的方法，其特征在于，在所述第三通信设备将第三定时器的时长配置为第一时长或者所述第三通信设备将第三定时器的时长配置为第三时长之后，所述方法还包括：
    所述第三通信设备启动所述第三定时器，和/或停止所述第四定时器。
  21. 根据权利要16至20所述的方法，其特征在于，所述第二时长为k+s或k-1+s个符号，k为所述时间差，s为一个时隙中包含的符号数。
  22. 根据权利要求16至21任一项所述的方法，其特征在于，所述方法还包括：
    当所述第三定时器超时，和/或所述第三通信设备对所述第四通信设备发送的所述第二传输未成功解码时，所述第三通信设备启动所述第四定时器。
  23. 根据权利要求16至22任一项所述的方法，其特征在于，所述方法还包括：
    所述第三通信设将所述第三时长确定为已配置时长，和/或将所述第四时长确定为已配置时长。
  24. 根据权利要求23所述的方法，其特征在于，在所述第三通信设将所述第三时长确定为已配置时，和/或将所述第四时长确定为已配置时长之后，所述方法还包括：
    所述第三通信设备启动所述第三定时器，和/或停止所述第四定时器。
  25. 根据权利要求16至24所述的方法，其特征在于，所述第三通信设备启动第三定时器，包括：
    所述第三通信设备在发送所述第二传输对应的HARQ反馈后启动所述第三定时器。
  26. 根据权利要求25所述的方法，其特征在于，所述第三通信设备在向所述第四通信设备发送所述第二传输对应的HARQ反馈后启动第三定时器，包括：
    所述第三通信设备在发送所述第二传输对应的HARQ反馈后的第一个符号启动所 述第三定时器。
  27. 根据权利要求16至26任一项所述的方法，其特征在于，所述方法还包括：
    所述第三通信设备确定所述第二传输对应的HARQ反馈属性为使能。
  28. 根据权利要求16至27任一项所述的方法，其特征在于，所述第三定时器和所述第四定时器与所述第二传输对应的HARQ进程对应。
  29. 根据权利要求16至28任一项所述的方法，其特征在于，所述方法还包括：
    所述第三通信设备根据收到的来自所述第四通信设备的第二控制信息确定侧行链路上是否存在用于重传所述第二传输的至少一个预留资源。
  30. 一种通信方法，其特征在于，包括：
    当侧行链路上收到的第三传输对应的的混合自动重传请求HARQ反馈属性为非使能，和/或所述第五通信设备对所述第三传输未成功解码时，所述第五通信设备启动第五定时器，所述第五定时器用于指示收到重传授权前的时长。
  31. 根据权利要求30所述的方法，其特征在于，所述方法还包括：
    当所述第五定时器超时后，所述第五通信设备启动第六定时器，所述第六定时器用于指示收到重传的时长。
  32. 根据权利要求30或31所述的方法，其特征在于，所述方法还包括：
    当所述第五通信设备确定所述第三传输对应的HARQ反馈属性为非使能时，所述第五通信设备确定所述第六通信设备对所述第三传输采用盲重传。
  33. 根据权利要求32所述的方法，其特征在于，所述第五通信设备确定所述第六通信设备对所述第三传输采用盲重传，包括：
    所述第五通信设备根据接收的第三控制信息确定所述第六通信设备对所述第三传输采用盲重传，所述第三控制信息为所述第六通信设备在侧行链路上发送的第三传输对应的控制信息。
  34. 一种通信方法，其特征在于，包括：
    当侧行链路上发送的第三传输对应的混合自动重传请求HARQ反馈属性为非使能时，第六通信设备向第五通信设备发送所述第三传输后，延迟h个符号启动第五定时器，所述第五定时器用于指示发送重传授权前的时长。
  35. 根据权利要求34所述的方法，其特征在于，所述方法还包括：
    当所述第五定时器超时后，所述第六通信设备启动第六定时器，所述第六定时器用于指示发送重传的时长。
  36. 根据权利要求34或35所述的方法，其特征在于，所述方法还包括：
    当所述第六通信设备确定所述第三传输对应的HARQ反馈属性为非使能时，所述第六通信设备确定对第三传输采用盲重传。
  37. 一种通信设备，其特征在于，包括：处理器、存储器和通信接口；所述处理器与所述存储器耦合，所述处理器被配置为读取并执行存储器中的指令，以实现如权利要求1-8、16-29和/或30-33中任一项所述的通信方法。
  38. 一种通信设备，其特征在于，包括：处理器、存储器和通信接口；所述处理器与所述存储器耦合，所述处理器被配置为读取并执行存储器中的指令，以实现如权利要求9-15和/或34-36中任一项所述的通信方法。
  39. 一种通信装置，其特征在于，包括用于执行如权利要求1-8、16-29、30-33中任一项所述方法的模块。
  40. 一种通信装置，其特征在于，包括用于执行如权利要求9-1、34-36中任一项所述方法的模块。
  41. 一种通信装置，其特征在于，包括处理器和存储器，所述处理器和所述存储器耦合，所述处理器用于控制所述装置实现如权利要求1-8、16-29、30-33中任一项所述的方法。
  42. 一种通信装置，其特征在于，包括处理器和存储器，所述处理器和所述存储器耦合，所述处理器用于控制所述装置实现如权利要求9-15、34-36中任一项所述的方法。
  43. 一种通信装置，其特征在于，包括处理器和接口电路，所述接口电路用于接收来自所述通信装置之外的其它通信装置的信号并传输至所述处理器或将来自所述处理器的信号发送给所述通信装置之外的其它通信装置，所述处理器通过逻辑电路或执行代码指令用于实现如权利要求1-8、16-29、30-33中任一项所述的方法。
  44. 一种通信装置，其特征在于，包括处理器和接口电路，所述接口电路用于接收来自所述通信装置之外的其它通信装置的信号并传输至所述处理器或将来自所述处理器的信号发送给所述通信装置之外的其它通信装置，所述处理器通过逻辑电路或执行代码指令用于实现如权利要求9-15、34-36中任一项所述的方法。
  45. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序或指令，当所述计算机程序或指令被通信装置执行时，实现如权利要求1-36任一项所述的方法。
  46. 一种通信系统，其特征在于，包括如权利要求37、39、41、43中任一项所述的通信装置，和如权利要求38、40、42、44中任一项所述的通信装置。
  47. 一种计算机程序产品，其特征在于，所述计算机程序产品包括指令，当所述指令被计算机运行时，实现如权利要求1-36任一项所述的方法。
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See also references of EP4120734A4
SPREADTRUM COMMUNICATIONS: "Discussion on NR sidelink Mode 2 resource allocation", 3GPP DRAFT; R1-1910007 DISCUSSION ON NR SIDELINK MODE 2 RESOURCE ALLOCATION_FINAL, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Chongqing, China; 20191014 - 20191020, 1 October 2019 (2019-10-01), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051788814 *

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EP4120734A4 (en) 2023-12-06
EP4120734A1 (en) 2023-01-18
US20230023698A1 (en) 2023-01-26

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