WO2022082677A1 - 边链路非连续接收方法及装置 - Google Patents

边链路非连续接收方法及装置 Download PDF

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Publication number
WO2022082677A1
WO2022082677A1 PCT/CN2020/123006 CN2020123006W WO2022082677A1 WO 2022082677 A1 WO2022082677 A1 WO 2022082677A1 CN 2020123006 W CN2020123006 W CN 2020123006W WO 2022082677 A1 WO2022082677 A1 WO 2022082677A1
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Prior art keywords
side link
control information
terminal device
time slot
timer
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PCT/CN2020/123006
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English (en)
French (fr)
Inventor
纪鹏宇
李国荣
张健
王昕�
张磊
Original Assignee
富士通株式会社
纪鹏宇
李国荣
张健
王昕�
张磊
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Application filed by 富士通株式会社, 纪鹏宇, 李国荣, 张健, 王昕�, 张磊 filed Critical 富士通株式会社
Priority to KR1020237012608A priority Critical patent/KR20230069177A/ko
Priority to PCT/CN2020/123006 priority patent/WO2022082677A1/zh
Priority to JP2023522911A priority patent/JP7529153B2/ja
Priority to EP20958259.2A priority patent/EP4236598A4/en
Priority to CN202080105156.XA priority patent/CN116195355A/zh
Publication of WO2022082677A1 publication Critical patent/WO2022082677A1/zh
Priority to US18/133,829 priority patent/US20230247718A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1848—Time-out mechanisms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1893—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/28—Timers or timing mechanisms used in protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • 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

  • the embodiments of the present application relate to the field of communication technologies.
  • Mode 1 In Rel-15 and previous versions of the Internet of Vehicles (V2X, Vehicle to Everything) communication, two allocation methods of side link (Sidelink) resources are supported: Mode 1 and Mode 2.
  • Mode 1 side link resources are allocated by network equipment (such as base stations) and obtained;
  • Mode 2 terminal equipment autonomously selects transmission resources, that is, transmission resources are obtained through sensing or detection-resource selection process.
  • New Radio (NR, New Radio) V2X is one of the research projects of Rel-16 standardization. Compared with Long Term Evolution (LTE, Long Term Evolution) V2X, NR V2X needs to support many new scenarios and new services ( For example, remote driving, autonomous driving and fleet driving, etc.), need to meet higher technical indicators (high reliability, low latency, high data rate, etc.).
  • LTE Long Term Evolution
  • NR V2X needs to support many new scenarios and new services ( For example, remote driving, autonomous driving and fleet driving, etc.), need to meet higher technical indicators (high reliability, low latency, high data rate, etc.).
  • the physical channels defined by NR V2X include Physical Sidelink Control Channel (PSCCH, Physical Sidelink Control Channel), Physical Sidelink Shared Channel (PSSCH, Physical Sidelink Shared Channel) and Physical Sidelink Feedback Channel (PSFCH, Physical Sidelink Feedback Channel) ).
  • PSCCH carries the 1st stage side link control information (SCI, Sidelink Control Informaiton), and the 1st stage SCI is mainly used to reserve resources.
  • PSSCH carries the second stage (2nd stage) SCI and transport block (TB, Transport Block), and the 2nd stage SCI is mainly used for TB demodulation.
  • the PSFCH carries sidelink feedback information (may be referred to as HARQ-ACK).
  • the resources (time-frequency resources) used for side link transmission are located in a certain resource pool.
  • embodiments of the present application provide a method and apparatus for discontinuous reception of a side link.
  • a method for discontinuous reception of a side link including:
  • the first terminal device receives the first side link control information sent by the second terminal device, where the first side link control information indicates a preamble for retransmission after the time slot where the first side link control information is located. resources;
  • the first terminal device is in an active or open state on the side link in the time slot where the reserved resource is located.
  • an apparatus for side link discontinuous reception which is configured in a first terminal device, and the apparatus includes:
  • a receiving unit configured to receive the first side link control information sent by the second terminal device, where the first side link control information indicates a preamble for retransmission after the time slot where the first side link control information is located; resources; and
  • a method for discontinuous reception of a side link including:
  • the first terminal device receives the first side link control information sent by the second terminal device, and the first side link control information does not indicate a pre-report for retransmission after the time slot where the first side link control information is located. resources;
  • the first terminal device After receiving the first side link control information and passing through a predetermined number of time slots in the resource pool, the first terminal device is in an active or open state on the side link.
  • an apparatus for side link discontinuous reception which is configured in a first terminal device, and the apparatus includes:
  • a receiving unit which receives the first side link control information sent by the second terminal device, and the first side link control information does not indicate a pre-report for retransmission after the time slot where the first side link control information is located; resources; and
  • the processing unit after receiving the first side link control information and passing through a predetermined number of time slots in the resource pool, enables the first terminal device to be in an active or open state on the side link.
  • a method for discontinuous reception of a side link including:
  • the first terminal device receives the third side link control information sent by the second terminal device, and the third side link control information indicates the third side link control information used for retransmission after the time slot where the third side link control information is located. a reserved resource;
  • the first terminal device starts from the side link after the time slot where the first reserved resource is located. Beginning with the first symbol of the first time slot in the resource pool, multiple consecutive time slots in the side link resource pool are in an active or open state.
  • PSCCH physical side link control channel
  • an apparatus for side link discontinuous reception which is configured in a first terminal device, and the apparatus includes:
  • a receiving unit which receives the third side link control information sent by the second terminal device, where the third side link control information indicates the third side link control information used for retransmission after the time slot where the third side link control information is located. a reserved resource;
  • the processing unit in the case that the corresponding physical side link control channel is not received on the first reserved resource, selects the first reserved resource from the first reserved resource in the side link resource pool after the time slot where the first reserved resource is located.
  • the first symbol of the time slot starts, so that the first terminal device is in an active or open state in a plurality of consecutive time slots in the side link resource pool.
  • the receiving device receives the side link control information sent by the sending device, and performs discontinuous reception for retransmission according to the reserved resources indicated in the side link control information;
  • the link DRX mechanism enables the receiving device to receive the retransmitted data of the transmitting device and saves power consumption.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a side link discontinuous reception method according to an embodiment of the present application
  • FIG. 3 is an exemplary diagram of side link discontinuous reception according to an embodiment of the present application.
  • FIG. 4 is another example diagram of side link discontinuous reception according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a side link discontinuous reception method according to an embodiment of the present application.
  • FIG. 6 is an exemplary diagram of side link discontinuous reception according to an embodiment of the present application.
  • FIG. 7 is another example diagram of side link discontinuous reception according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a side link discontinuous reception method according to an embodiment of the present application.
  • FIG. 9 is an example diagram of side link discontinuous reception according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a side link discontinuous receiving apparatus according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a network device according to an embodiment of the present application.
  • FIG. 12 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terms “first”, “second”, etc. are used to distinguish different elements in terms of numelation, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be referred to by these terms restricted.
  • the term “and/or” includes any and all combinations of one or more of the associated listed items.
  • the terms “comprising”, “including”, “having”, etc. refer to the presence of stated features, elements, elements or components, but do not preclude the presence or addition of one or more other features, elements, elements or components.
  • the term "communication network” or “wireless communication network” may refer to a network that conforms to any of the following communication standards, such as Long Term Evolution (LTE, Long Term Evolution), Long Term Evolution Enhanced (LTE-A, LTE- Advanced), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), High-Speed Packet Access (HSPA, High-Speed Packet Access) and so on.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution Enhanced
  • WCDMA Wideband Code Division Multiple Access
  • High-Speed Packet Access High-Speed Packet Access
  • HSPA High-Speed Packet Access
  • the communication between devices in the communication system can be carried out according to communication protocols at any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G , New Radio (NR, New Radio), etc., and/or other communication protocols currently known or to be developed in the future.
  • Network device refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device.
  • Network devices may include but are not limited to the following devices: base station (BS, Base Station), access point (AP, Access Point), transmission and reception point (TRP, Transmission Reception Point), broadcast transmitter, mobility management entity (MME, Mobile Management Entity), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller) and so on.
  • the base station may include but is not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), and 5G base station (gNB), etc., and may also include a remote radio head (RRH, Remote Radio Head) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay) or low power node (eg femeto, pico, etc.).
  • RRH Remote Radio Head
  • RRU Remote Radio Unit
  • relay relay
  • low power node eg femeto, pico, etc.
  • base station may include some or all of their functions, each base station may provide communication coverage for a particular geographic area.
  • the term "cell” may refer to a base station and/or its coverage area, depending on the context in which the term is used.
  • the term "User Equipment” (UE, User Equipment) or “Terminal Equipment” (TE, Terminal Equipment or Terminal Device), for example, refers to a device that accesses a communication network through a network device and receives network services.
  • a terminal device may be fixed or mobile, and may also be referred to as a mobile station (MS, Mobile Station), a terminal, a subscriber station (SS, Subscriber Station), an access terminal (AT, Access Terminal), a station, and the like.
  • the terminal device may include but is not limited to the following devices: Cellular Phone (Cellular Phone), Personal Digital Assistant (PDA, Personal Digital Assistant), wireless modem, wireless communication device, handheld device, machine type communication device, laptop computer, Cordless phones, smartphones, smart watches, digital cameras, and more.
  • Cellular Phone Cellular Phone
  • PDA Personal Digital Assistant
  • wireless modem wireless communication device
  • handheld device machine type communication device
  • laptop computer Cordless phones, smartphones, smart watches, digital cameras, and more.
  • the terminal device may also be a machine or device that performs monitoring or measurement, such as but not limited to: Machine Type Communication (MTC, Machine Type Communication) terminals, In-vehicle communication terminals, device-to-device (D2D, Device to Device) terminals, machine-to-machine (M2M, Machine to Machine) terminals, etc.
  • MTC Machine Type Communication
  • D2D Device to Device
  • M2M Machine to Machine
  • network side refers to one side of the network, which may be a certain base station, and may also include one or more network devices as described above.
  • user side or “terminal side” or “terminal device side” refers to the side of a user or terminal, which may be a certain UE, or may include one or more terminal devices as above.
  • equipment may refer to network equipment or terminal equipment.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present application, which schematically illustrates the case of a terminal device and a network device as an example.
  • a communication system 100 may include a network device 101 and terminal devices 102 and 103 .
  • FIG. 1 only takes two terminal devices and one network device as an example for description, but the embodiment of the present application is not limited to this.
  • Enhanced Mobile Broadband eMBB, enhanced Mobile Broadband
  • Massive Machine Type Communication mMTC, massive Machine Type Communication
  • Ultra-Reliable and Low Latency Communication URLLC, Ultra-Reliable and Low.
  • -Latency Communication etc.
  • FIG. 1 shows that both terminal devices 102 and 103 are within the coverage of the network device 101, but the present application is not limited to this. Both terminal devices 102 , 103 may not be within the coverage of the network device 101 , or one terminal device 102 may be within the coverage of the network device 101 and the other end device 103 may be outside the coverage of the network device 101 .
  • side link transmission may be performed between the two terminal devices 102 and 103 .
  • the two terminal devices 102 and 103 can both perform side link transmission within the coverage of the network device 101 to implement V2X communication, or both can perform side link transmission outside the coverage of the network device 101 to implement V2X
  • one terminal device 102 is within the coverage of the network device 101 and another terminal device 103 is outside the coverage of the network device 101 to perform side link transmission to implement V2X communication.
  • the terminal devices 102 and/or 103 may autonomously select side link resources (ie, adopt Mode2), and in this case, the side link transmission may be independent of the network device 101, that is, the network device 101 is optional .
  • the embodiment of the present application may also combine the autonomous selection of side link resources (that is, using Mode 2) and the allocation of side link resources by the network device (that is, using Mode 1); the embodiment of the present application does not limit this.
  • a terminal device can obtain side link transmission resources through the process of sensing detection + resource selection, in which sensing can be performed continuously to obtain the resource occupancy in the resource pool. For example, the terminal device can estimate the resource occupancy in a later period of time (called a selection window) according to the resource occupancy in a previous period of time (called a perception window).
  • a selection window the resource occupancy in a later period of time
  • a perception window the resource occupancy in a previous period of time
  • the side link is described by taking V2X as an example, but the present application is not limited to this, and can also be applied to a side link transmission scenario other than V2X.
  • the terms “side link” and “V2X” are interchangeable, the terms “PSFCH” and “side link feedback channel” are interchangeable, and the terms “PSCCH” and “ “Sidelink Control Channel” or “Sidelink Control Information” are interchangeable, as are the terms “PSSCH” and “Sidelink Data Channel” or “Sidelink Data”.
  • transmitting or receiving PSCCH can be understood as sending or receiving side link control information carried by PSCCH; sending or receiving PSSCH can be understood as sending or receiving side link data carried by PSSCH; sending or receiving PSFCH can be understood as sending or receiving side link feedback information carried by PSFCH.
  • Sidelink transmission also called sidelink transmission
  • PSCCH/PSSCH transmission or sidelink data/information transmission can be understood as PSCCH/PSSCH transmission or sidelink data/information transmission.
  • An embodiment of the present application provides a method for discontinuous reception of a side link, which is described from a first terminal device.
  • the second terminal device may send side link data to the first terminal device, so the second terminal device needs to perform resource selection to determine a resource for sending side link data.
  • the second terminal device in this embodiment of the present application is a transmitting device, and the first terminal device is a receiving device.
  • FIG. 2 is a schematic diagram of a side link discontinuous reception method according to an embodiment of the present application. As shown in FIG. 2 , the method includes:
  • a first terminal device receives first side link control information sent by a second terminal device, where the first side link control information indicates that the time slot where the first side link control information is located is used for retransmission reserved resources;
  • the first terminal device is in an active (active) or an on (on) state on the side link in the time slot where the reserved resource is located.
  • FIG. 2 only schematically illustrates the embodiment of the present application, but the present application is not limited thereto.
  • the execution order of the various operations can be adjusted appropriately, and other operations can be added or some of the operations can be reduced.
  • Those skilled in the art can make appropriate modifications according to the above content, and are not limited to the description of the above-mentioned FIG. 2 .
  • the terminal device may perform side link DRX.
  • the terminal device may be in an active or on state on the side link, and in this state, the terminal device performs PSCCH detection in the corresponding receiving resource pool; the terminal device may also be in an active or on state on the side link. Inactive (inactive) or off (off) state, in this state, the terminal device does not perform PSCCH detection in the corresponding receiving resource pool.
  • the embodiments of the present application are not limited to this, and related technologies may also be referred to regarding the DRX mechanism.
  • the first terminal device is an intended receiving terminal of the first sidelink control information and/or the corresponding PSSCH.
  • the destination identifier indicated in the first side link control information is the same as the identifier of the first terminal device (the corresponding service is unicast), or the destination identifier includes the identifier of the first terminal device (the corresponding service is multicast), or, the first side link control information indicates a service of interest to the first terminal device (the corresponding service is broadcast).
  • UE 1 can perform blind detection on PSCCH, and when blindly detects that the destination ID in a certain SCI is the same as its own UE ID, or the destination ID includes its own UE ID, or the SCI indicates a service that UE 1 is interested in, then the UE 1 1 It is considered that the SCI is the SCI sent to itself, and can be processed according to the SCI.
  • the first side link control information and the second to fourth side link control information described later are SCIs borne by PSCCH or PSSCH, but the present application is not limited thereto.
  • the current time slot is, for example, the time slot where the PSCCH and/or PSSCH corresponding to the first side link control information is located.
  • the terminal device can configure timers for different processes. There are multiple. For the case of multiple side link processes, the terminal device can process it according to the set. For example, if UE 1 has multiple side link processes, if a certain side link process needs to be activated or enabled, the UE 1 should be in the activated or enabled state.
  • the first terminal device can be activated (active) or turned on (on) at the time position of the reserved resource, and perform sidelink information at the time position (eg PSCCH/PSSCH) reception, thereby implementing the V2X DRX mechanism.
  • the first terminal device may enter an inactive (inactive) or off (off) state.
  • UE 1 After UE 1 receives a certain SCI sent by UE 2 in time slot 1, if the SCI indicates the corresponding PSSCH (in time slot 1 in the resource pool) and reserved resource 1 (in time slot 2 in the resource pool) ), then the UE 1 can determine that during the time between time slot 1 and time slot 2, UE 2 will not send side link information or side link data, then UE 1 can enter inactive (inactive) or Off state, thereby saving power consumption and implementing the V2X DRX mechanism.
  • the first terminal device starting from the first symbol of the time slot in which the reserved resource is located, the first terminal device is activated or turned on on the side link, and continues (or maintains) a time slot in the side link resource pool. slot or multiple consecutive slots.
  • the first side link control information indicates that the hybrid automatic repeat request (HARQ, Hybrid Automatic Repeat reQuest) is disabled, or the first side link control information indicates that the hybrid automatic repeat request is enabled
  • HARQ Hybrid Automatic Repeat reQuest
  • NACK non-acknowledgement
  • the first terminal device when the first side link control information indicates that HARQ is enabled, and the first terminal device feeds back an acknowledgment (ACK), from the time slot in which the reserved resource is located. Beginning with the first symbol, the first terminal device may be (or remain) inactive or off on the side link.
  • ACK acknowledgment
  • time slots related to the DRX or the timer in this embodiment of the present application only consider the time slots in the side link resource pool, and the "start", “stop”, and "timeout" of the timer are all for the time slots in the side link resource pool. In terms of time slots. For time slots not included in the edge link resource pool, that is, time slots that cannot be used by the edge link, the already running timer should be in the "pending" or "pengding" state.
  • the running time length of the timer is calculated by the number of time slots contained in the side link resource pool, and can also be converted into the corresponding millisecond value. For the time slots not included in the edge link resource pool, the time length of the timer is not counted, that is, the timer should be suspended (or pending) at this time, and the time slots outside the resource pool are not counted.
  • M' is the number of corresponding time slots after M is converted to a logical time slot (logical slot)
  • M is the number of time slots corresponding to the actual time length of the timer, as described in the following formula (1):
  • N is the number of time slots that can be used for side link transmission within 20ms.
  • the above only schematically illustrates the conversion between time slots and milliseconds, and the related art may also be referred to for the specific content.
  • the first terminal device starts a first timer for the sidelink process.
  • the first timer may be defined as drx-HARQ-RTT-TimerSL, and the first terminal device may be in an inactive or off state during the operation of drx-HARQ-RTT-TimerSL; but the first terminal device Whether to enter the inactive or off state also needs to consider other factors, such as the situation of other side link processes.
  • the present application is not limited to this, for example, the first timer may also have other names or definitions.
  • the value of the first timer is the number of time slots; the number is the first time slot in the side link resource pool after the time slot in which the first side link control information is received from the first terminal device, The total number of time slots in the resource pool included in the time slot in the previous side link resource pool before the time slot in which the reserved resource for next transmission is located, which is indicated in the first side link control information. Every time a time slot in the side link resource pool passes, the value of the first timer is decremented by 1; when the value of the first timer reaches 0, the first timer times out.
  • the first sidelink control information indicates that HARQ is disabled, or the first sidelink control information indicates that HARQ is enabled and the In the case where the first terminal device feeds back a non-acknowledgement (NACK), in the next time slot in the side link resource pool after the first timer expires, the first terminal device starts a second timing for the side link process device and enter the active (active) or open (on) state.
  • NACK non-acknowledgement
  • the second timer is drx-RetransmissionTimerSL
  • the first terminal device is in an active (active) or an on (on) state during the operation of drx-RetransmissionTimerSL.
  • the present application is not limited to this, for example, the second timer may also have other names.
  • the second timer is started at the first symbol of the first time slot in the side link resource pool after the first timer expires, and the running time length of the second timer is one time slot.
  • FIG. 3 is an example diagram of the discontinuous reception of the side link according to the embodiment of the present application, which shows that the SCI indicates that there are reserved resources for retransmission after the time slot where the SCI is located (for example, this means that the adjacent resources are all within 32 time slot), and disable HARQ-ACK (HARQ disabled).
  • the sending device (Tx UE) sends SCI 1 (the first SCI) to the receiving device (Rx UE) by sending resource 1 (shown as 1 st Tx in Figure 3); the SCI 1 indicates that there are The resource corresponding to the PSSCH (that is, as shown in 1 st Tx in Figure 3), and also indicates the reserved resource 1 for retransmission after the time slot where the SCI 1 is located (as shown in 2 nd Tx in Figure 3 ) ) and reserved resource 2 (shown as 3rd Tx in Figure 3).
  • the receiving device can start the drx-HARQ-RTT-TimerSL timer at the first symbol of the first time slot after the time slot where the SCI 1 is located. As shown in FIG. 3 , the drx-HARQ-RTT-TimerSL timer expires after the end of the previous time slot of the time slot where the reserved resource (ie, reserved resource 1) indicated by SCI 1 for next transmission is located.
  • the reserved resource ie, reserved resource 1
  • the drx-RetransmissionTimerSL timer is started, and the receiving device enters the active (active) or on (on) state. Received through retransmissions sent by reserved resource 1.
  • the drx-RetransmissionTimerSL timer may be one slot.
  • the drx-HARQ-RTT-TimerSL timer is started.
  • the drx-HARQ-RTT-TimerSL timer expires after the end of the previous time slot of the time slot where the reserved resource (that is, the reserved resource 2) indicated by SCI 1 or SCI 2 for next transmission is located.
  • the drx-RetransmissionTimerSL timer is started, and the receiving device enters the active (active) or on (on) state. Received by retransmission sent by reserved resource 2.
  • the value of the drx-RetransmissionTimerSL timer can be 1, that is, the timer can run for one time slot.
  • the first timer and the second timer in the embodiments of the present application, and the inactive (inactive) or off (off) state, active (active) or on (on) state of the receiving device are exemplarily described above.
  • the present application is not limited to this.
  • the first terminal device receives second sidelink control information in the active or open state; after receiving the second sidelink control information and the second sidelink control information indicates The destination identifier (destination ID) and the source identifier (source ID) and the hybrid automatic repeat request (HARQ) process identifier and the destination identifier (destination ID) and source identifier (source ID) indicated by the first side link control information and if the Hybrid Automatic Repeat Request (HARQ) process identifiers are the same, stop the second timer.
  • HARQ Hybrid Automatic Repeat Request
  • the drx-HARQ-RTT-TimerSL timer expires or stops, the drx-RetransmissionTimerSL timer is started, and the receiving device enters the active or on state, Retransmissions sent over reserved resource 1 (shown as 2 nd Tx in Figure 3) are received.
  • the receiving device receives a certain SCI (second SCI), the destination ID (destination ID) and the source ID (source ID) indicated by the second SCI ID) and the HARQ process identifier are the same as the destination identifier (destination ID), the source identifier (source ID) and the HARQ process identifier indicated by the aforementioned first SCI, it can be considered that the second SCI indicates the retransmission of the HARQ process, then receive The device may receive the retransmission and stop the drx-RetransmissionTimerSL.
  • the first terminal device when the first side link control information indicates that hybrid automatic repeat request (HARQ) is enabled, and the first terminal device feeds back an acknowledgment (ACK), the first terminal device transmits an acknowledgement (ACK) from the first terminal device.
  • HARQ hybrid automatic repeat request
  • ACK acknowledgement
  • the first symbol of the time slot in the first side link resource pool after a timer expires may remain in the inactive or off state. For example, the second timer is not started for the first symbol in the side link resource pool after the first timer expires.
  • FIG. 4 is another example diagram of side link discontinuous reception according to an embodiment of the present application, showing that the SCI indicates that there are reserved resources for retransmission after the time slot where the SCI is located (for example, this means that the adjacent resources are all at 32 time slots) and HARQ-ACK is enabled (HARQ enabled).
  • the sending device (Tx UE) sends SCI 1 (the first SCI) to the receiving device (Rx UE) by sending resource 1 (shown as 1 st Tx in Figure 4); the SCI 1 indicates that there are The resource corresponding to the PSSCH (shown as 1 st Tx in Figure 4), and also indicates the reserved resource 1 for retransmission after the time slot where SCI 1 is located (shown as 2 nd Tx in Figure 4) and reserved resource 2 (shown as 3rd Tx in Figure 4).
  • the receiving device can start the drx-HARQ-RTT-TimerSL timer at the first symbol of the first time slot after the time slot where the SCI 1 is located. As shown in FIG. 4 , the drx-HARQ-RTT-TimerSL timer expires after the end of the previous time slot of the time slot where the reserved resource (ie, reserved resource 1) indicated by SCI 1 for next transmission is located.
  • the reserved resource ie, reserved resource 1
  • the drx-RetransmissionTimerSL timer is started, and the receiving device enters the active (active) or on (on) state. Received through retransmissions sent by reserved resource 1.
  • the value of the drx-RetransmissionTimerSL timer may be 1.
  • the drx-HARQ-RTT-TimerSL timer is started.
  • the reserved resource 2 (shown as 3rd Tx in Figure 4) is cancelled or released by the second terminal.
  • the receiving device in the time slot where the reserved resource 2 is located no longer starts the drx-Retransmission TimerSL.
  • the first timer and the second timer in the embodiments of the present application, and the inactive (inactive) or off (off) state, active (active) or on (on) state of the receiving device are exemplarily described above.
  • the present application is not limited to this.
  • the time slot in which the resource selected by the second terminal device for initial transmission is located is during the running period of a third timer that runs periodically and is used by the first terminal device Discontinuous reception (DRX).
  • DRX Discontinuous reception
  • the third timer may be defined as OnDurationTimer, and during the running period of the OnDurationTimer, the first terminal device is in an active (active) or an on (on) state.
  • the present application is not limited to this, for example, the third timer may also have other names or definitions.
  • the sending resource 1 shown as 1 st Tx in FIG. 3 or FIG. 4
  • the sending device can obtain the DRX configuration of the receiving device, thereby ensuring that at least the time slot where the first resource of the selected resource is located is within the OnDurationTimer running period of the receiving device.
  • the receiving device receives the side link control information sent by the sending device, and performs discontinuous reception according to the reserved resources indicated in the side link control information; thus, the side link DRX mechanism can be implemented, so that the receiving device can Retransmission data from the transmitting device is received, and power consumption can be saved.
  • An embodiment of the present application provides a method for discontinuous reception of a side link, which is described from the first terminal device, and the same content as that of the embodiment of the first aspect will not be repeated.
  • the embodiments of the second aspect may be combined with the embodiments of the first aspect, or may be implemented independently.
  • FIG. 5 is a schematic diagram of a side link discontinuous reception method according to an embodiment of the present application. As shown in FIG. 5 , the method includes:
  • a first terminal device receives first side link control information sent by a second terminal device, where the first side link control information does not indicate that the time slot where the first side link control information is located is used for retransmission reserved resources;
  • the first terminal device After receiving the first side link control information and passing through a predetermined number of time slots in the resource pool, the first terminal device is in an active or open state on the side link.
  • FIG. 5 only schematically illustrates the embodiment of the present application, but the present application is not limited thereto.
  • the execution order of the various operations can be adjusted appropriately, and other operations can be added or some of the operations can be reduced.
  • Those skilled in the art can make appropriate modifications according to the above content, and are not limited to the description of the above-mentioned FIG. 5 .
  • reserved resources for retransmission are not indicated in the first sidelink control information.
  • the current transmission may be the last retransmission, or two adjacent resources are not within 32 slots.
  • the receiving device needs to be able to receive retransmissions.
  • the first terminal device is in an active or open state after receiving the first side link control information and a predetermined time elapses. For example, at the first symbol position of the 32nd time slot after the time slot where the first side link control information is located, the first terminal device starts drx-RetransmissionTimerSL.
  • the first terminal device may be in an inactive or off state on the side link.
  • the first terminal device is an intended receiving terminal of the first sidelink control information and/or the corresponding physical sidelink shared channel (PSSCH).
  • PSSCH physical sidelink shared channel
  • the destination identifier indicated in the first side link control information is the same as the identifier of the first terminal device, or the destination identifier includes the identifier of the first terminal device, or the first side
  • the link control information indicates services of interest to the first terminal device.
  • the first terminal device receives from the first terminal device the time slot in the first side link resource pool after the time slot where the first side link control information is located.
  • the first symbol starts the first timer.
  • the first timer may be defined as drx-HARQ-RTT-TimerSL, and the first terminal device may be in an inactive or off state during the operation of the drx-HARQ-RTT-TimerSL.
  • the present application is not limited to this, for example, the first timer may also have other names or definitions.
  • the value of the first timer is the number of time slots; the number is a predetermined number of time slots in the side link resource pool; each time a time slot in the side link resource pool passes, the first timer The value of the first timer is decremented by 1; when the value of the first timer reaches 0, the first timer times out.
  • the predetermined number of time slots is 31.
  • the first terminal device in the next time slot in the sidelink resource pool after the first timer expires, starts a second timer for the sidelink process and enters the activation or open state.
  • the second timer may be defined as drx-Retransmission TimerSL, and during the operation of drx-Retransmission TimerSL, the first terminal device is in an active (active) or an on (on) state.
  • the present application is not limited to this, for example, the second timer may also have other names or definitions.
  • the second timer is started at the first symbol of the time slot in the first resource pool after the first timer expires, and the value of the second timer is a plurality of consecutive The number of time slots in the edge link resource pool. Every time a time slot in the side link resource pool passes, the value of the second timer is decremented by 1; when the value of the second timer reaches 0, the second timer times out.
  • Fig. 6 is another example diagram of the discontinuous reception of the side link according to the embodiment of the present application, showing that the SCI 0 indicates that there are reserved resources for retransmission after the time slot where the SCI0 is located (for example, this indicates that the adjacent resources are at 32 within 32 time slots) and SCI 1 does not indicate reserved resources for retransmission after the time slot where the SCI 1 is located (for example, this means that adjacent resources are not within 32 time slots), and disable HARQ-ACK ( HARQ disabled).
  • the sending device sends SCI 0 to the receiving device (Rx UE) by sending resource 1 (shown as 1 st Tx in Figure 6); the SCI 0 indicates that there is a resource corresponding to PSSCH ( That is, as shown by 1 st Tx in FIG. 6 ), in addition, a reserved resource 1 for retransmission after the time slot where the SCI 0 is located is also indicated (as shown by 2 nd Tx in FIG. 6 ).
  • the receiving device can start the drx-HARQ-RTT-TimerSL timer at the first symbol of the first time slot after the time slot where the SCI 0 is located. As shown in FIG. 6 , the drx-HARQ-RTT-TimerSL timer expires after the end of the previous time slot of the time slot where the reserved resource (ie, reserved resource 1) indicated by SCI 0 for next transmission is located.
  • the reserved resource ie, reserved resource 1
  • the drx-RetransmissionTimerSL timer is started, and the receiving device enters the active (active) or on (on) state. Received through retransmissions sent by reserved resource 1.
  • the value of the drx-RetransmissionTimerSL timer may be 1.
  • the sending device sends SCI 1 (the first SCI) to the receiving device (Rx UE) by reserving resource 1 (shown as 2nd Tx in Figure 6); there is no SCI 1 in the SCI 1 Indicates the reserved resources after the time slot where the SCI 1 is located. As shown in Figure 6, there are no reserved resources in the 32 time slots after the reserved resource 1; the reserved resource 2 for retransmission (shown as 3rd Tx in Figure 6) and the reserved resource 1 The time interval between is greater than 32 time slots.
  • the drx-HARQ-RTT-TimerSL timer receives from the first terminal device the first time slot of the first time slot in the side link resource pool after the time slot where the first SCI is located (shown as 2 nd Tx in FIG. 6 ). One symbol to the last symbol of the 31st time slot in the side link resource pool after the time slot where the first SCI is located.
  • the drx-RetransmissionTimerSL timer is started, and the receiving device enters the active (active) or on (on) state. Received by retransmission sent by reserved resource 2. As shown in Figure 6, the drx-RetransmissionTimerSL timer can run on multiple consecutive time slots in the side link resource pool.
  • the first timer and the second timer in the embodiments of the present application, and the inactive (inactive) or off (off) state, active (active) or on (on) state of the receiving device are exemplarily described above.
  • the present application is not limited to this.
  • the first terminal device may further indicate whether there is any retransmission according to the side link control information (2 nd stage SCI) in the physical side link shared channel (PSSCH) corresponding to the first side link control information Or the number of retransmissions, to determine whether to start the second timer.
  • side link control information (2 nd stage SCI) in the physical side link shared channel (PSSCH) corresponding to the first side link control information Or the number of retransmissions, to determine whether to start the second timer.
  • the first SCI is received corresponding to reserved resource 1 (shown as 2 nd Tx in FIG. 6 ), and the PSSCH corresponding to the first SCI carries the 2 nd stage SCI. If the 2 nd stage SCI indicates that the HARQ process has subsequent retransmissions, the drx-RetransmissionTimerSL timer can be started after 31 time slots as shown in Figure 6; if the 2 nd stage SCI indicates that the HARQ process has no subsequent retransmissions If the number of transmissions or subsequent retransmissions is 0, the receiving device may no longer start the drx-RetransmissionTimerSL timer.
  • the first terminal device determines whether to start the second timer according to the priority and/or the channel busy rate (CBR, Channel Busy Rate) indicated by the first side link control information.
  • CBR Channel Busy Rate
  • the first SCI is received in FIG. 6 corresponding to reserved resource 1 (shown as 2 nd Tx in FIG. 6 ). If the first SCI indicates a high priority (for example, higher than a certain threshold), the drx-RetransmissionTimerSL timer may be started after 31 time slots as shown in FIG. 6 ; if the first SCI indicates a low priority (for example, a low priority) lower than a certain threshold), the receiving device can no longer start the drx-RetransmissionTimerSL timer.
  • a high priority for example, higher than a certain threshold
  • the drx-RetransmissionTimerSL timer may be started after 31 time slots as shown in FIG. 6 ; if the first SCI indicates a low priority (for example, a low priority) lower than a certain threshold
  • the receiving device can no longer start the drx-RetransmissionTimerSL timer.
  • the value of the second timer is determined according to the priority indicated by the first sidelink control information. For example, for different priorities, the candidate values corresponding to the second timer are different.
  • the corresponding drx-RetransmissionTimerSL value can be configured in the IE of the resource pool configuration.
  • different values of drx-RetransmissionTimerSL can be configured.
  • the higher the priority the larger the value of drx-RetransmissionTimerSL.
  • the first terminal device receives the second sidelink control information in the activated or on state; after receiving the second sidelink control information and the second sidelink control information indicates In the case where the destination identifier, source identifier and hybrid automatic repeat request (HARQ) process identifier are the same as the destination identifier, source identifier and hybrid automatic repeat request (HARQ) process identifier indicated by the first side link control information, Stop the second timer.
  • HARQ hybrid automatic repeat request
  • the first terminal device where the first side link control information indicates that Hybrid Automatic Repeat Request (HARQ) is enabled, and the first terminal device feeds back an acknowledgment (ACK), the first terminal device sends back an acknowledgment (ACK) from the
  • HARQ Hybrid Automatic Repeat Request
  • the first terminal device sends back an acknowledgment (ACK) from the
  • ACK acknowledgment
  • the inactive or closed state may be maintained on the side link.
  • the second timer is not started for the first symbol of the time slot in the first side link resource pool after the first timer expires.
  • Fig. 7 is another example diagram of side link discontinuous reception according to an embodiment of the present application, showing that SCI 0 indicates that there are reserved resources for retransmission after the time slot where the SCI 0 is located (for example, this indicates that adjacent resources are in within 32 time slots) and SCI 1 does not indicate reserved resources for retransmission after the time slot where the SCI 1 is located (for example, this indicates that adjacent resources are not within 32 time slots), and HARQ-ACK is enabled ( HARQ enabled).
  • the sending device sends SCI 0 to the receiving device (Rx UE) by sending resource 1 (shown as 1 st Tx in Figure 7); the SCI 0 indicates that there is a resource corresponding to PSSCH ( That is, as shown by 1 st Tx in FIG. 7 ), in addition, the reserved resource 1 for retransmission after the time slot where the SCI 0 is located is also indicated (as shown by 2 nd Tx in FIG. 7 ).
  • the receiving device can start the drx-HARQ-RTT-TimerSL timer at the first symbol of the first time slot after the time slot where the SCI 0 is located. As shown in FIG. 7 , the drx-HARQ-RTT-TimerSL timer expires after the end of the previous time slot of the time slot where the reserved resource (ie, reserved resource 1) indicated by SCI 0 for next transmission is located.
  • the reserved resource ie, reserved resource 1
  • the drx-RetransmissionTimerSL timer is started, and the receiving device enters the active (active) or on (on) state. Received through retransmissions sent by reserved resource 1.
  • the value of the drx-RetransmissionTimerSL timer may be 1.
  • the transmitting device (Tx UE) sends SCI 1 (the first SCI) to the receiving device (Rx UE) by reserving resource 1 (shown as 2 nd Tx in Figure 7); there is no SCI 1 in the SCI 1 Indicates the reserved resources after the time slot where the SCI 1 is located. As shown in Figure 7, there are no reserved resources in the 32 time slots after the reserved resource 1; the reserved resource 2 for retransmission (shown as 3rd Tx in Figure 7) and the reserved resource 1 The time interval between is greater than 32 time slots.
  • the drx-HARQ-RTT-TimerSL timing As shown in Figure 7, corresponding to the reserved resource 1 (shown as 2 nd Tx in Figure 7), after receiving and correctly decoding the SCI 1 corresponding to the reserved resource 1, the drx-HARQ-RTT-TimerSL timing the device is activated.
  • the drx-HARQ-RTT-TimerSL timer receives from the first terminal device the first time slot of the first time slot in the side link resource pool after the time slot where the first SCI is located (shown as 2 nd Tx in FIG. 6 ). One symbol to the last symbol of the 31st time slot in the side link resource pool after the time slot where the first SCI is located.
  • the reserved resource 2 (shown as 3 rd Tx in Figure 7) may be canceled (cancel), so the receiving device can no longer start drx -Retransmission TimerSL.
  • the first timer and the second timer in the embodiments of the present application, and the inactive (inactive) or off (off) state, active (active) or on (on) state of the receiving device are exemplarily described above.
  • the present application is not limited to this.
  • the time slot in which the resource selected by the second terminal device for initial transmission is located is during the running period of a third timer that runs periodically and is used by the first terminal device Discontinuous reception (DRX).
  • DRX Discontinuous reception
  • the third timer may be defined as OnDurationTimer, and during the running period of the OnDurationTimer, the first terminal device is in an active (active) or an on (on) state.
  • the present application is not limited to this, for example, the third timer may also have other names or definitions.
  • the sending resource 1 shown as 1 st Tx in FIG. 6 or FIG. 7
  • the sending device can obtain the DRX configuration of the receiving device, thereby ensuring that at least the time slot where the first resource of the selected resource is located is within the OnDurationTimer running period of the receiving device.
  • the receiving device receives the side link control information sent by the sending device, and performs discontinuous reception according to whether the reserved resources are indicated in the side link control information; thus, the side link DRX mechanism can be implemented, so that the receiving device can Retransmission data from the transmitting device is received, and power consumption can be saved.
  • An embodiment of the present application provides a method for discontinuous reception of a side link, which is described from the first terminal device, and the same contents as those of the embodiments of the first and second aspects will not be repeated.
  • the embodiments of the third aspect may be combined with the embodiments of the first and second aspects, or may be implemented independently.
  • FIG. 8 is a schematic diagram of a side link discontinuous reception method according to an embodiment of the present application. As shown in FIG. 8 , the method includes:
  • the first terminal device receives the third side link control information sent by the second terminal device, where the third side link control information indicates that the time slot where the third side link control information is located is used for retransmission 's first reserved resource;
  • the first terminal device starts from the side after the time slot where the first reserved resource is located. Starting from the first symbol of the first time slot in the link resource pool, multiple consecutive time slots in the side link resource pool are in an active or open state.
  • PSCCH physical side link control channel
  • FIG. 8 only schematically illustrates the embodiment of the present application, but the present application is not limited thereto.
  • the execution order of the various operations can be adjusted appropriately, and other operations can be added or some of the operations can be reduced.
  • Those skilled in the art can make appropriate modifications according to the above content, and are not limited to the description of the above-mentioned FIG. 8 .
  • the first terminal device does not receive the corresponding PSCCH/PSSCH on the first reserved resource. For example, due to factors such as re-evaluation/pre-emption/congestion control/priority, the second terminal device does not send on this resource and triggers resource reselection, at this time
  • the reselection resource may not be guaranteed to be within 32 slots of two adjacent resources. In this case, the first terminal device also needs to receive the corresponding retransmission.
  • the first terminal device is an intended recipient terminal of the third sidelink control information and/or the corresponding physical sidelink shared channel (PSSCH).
  • PSSCH physical sidelink shared channel
  • the destination identifier indicated in the third side link control information is the same as the identifier of the first terminal device, or the destination identifier includes the identifier of the first terminal device, or the third side
  • the link control information indicates services of interest to the first terminal device.
  • the first terminal device further starts a second timer for the side link process at the first symbol in the side link resource pool after the current time slot.
  • the second timer may be defined as drx-Retransmission TimerSL.
  • the first terminal device is in an active (active) or an on (on) state.
  • the present application is not limited to this, for example, the second timer may also have other names or definitions.
  • the value of the second timer is calculated from the first terminal.
  • the time slot in the first side link resource pool after the time slot where the first side link control information received by the device is located, to the time slot in the side link resource pool where the second reserved resource is located includes: The total number of time slots in the resource pool. Every time a time slot in the side link resource pool passes, the value of the second timer is decremented by 1; when the value of the second timer reaches 0, the second timer times out.
  • the sending device (Tx UE) sends the SCI (first SCI) to the receiving device (Rx UE) by sending resource 1 (shown as 1 st Tx in FIG. 3 or 4);
  • the SCI indicates that there are resources corresponding to PSSCH (as shown in Figure 3 or 4 as 1 st Tx), and also indicates that there is a reserved resource 1 for retransmission (as shown in 2 nd Tx in Figure 3 or 4) ) and reserved resource 2 (shown as 3rd Tx in Figure 3 or 4).
  • the receiving device can use the side link resource after the time slot where the reserved resource 1 is located.
  • the first symbol of the first time slot in the pool starts the drx-RetransmissionTimerSL and enters the active or on state.
  • the drx-RetransmissionTimerSL times out after the end of the last time slot before the time slot where resource 2 (shown as 3rd Tx in Figure 3 or 4) is reserved in the side link resource pool.
  • the The value of the second timer is the predetermined number of time slots in the side link resource pool. Every time a time slot in the side link resource pool passes, the value of the second timer is decremented by 1; when the value of the second timer reaches 0, the second timer times out.
  • the predetermined number of time slots is 31, for example.
  • the sending device sends the SCI (first SCI) to the receiving device (Rx UE) by sending resource 1 (shown as 1 st Tx in FIG. 6 or 7 );
  • the SCI indicates that there are resources corresponding to PSSCH (as shown in Figure 6 or 7 as 1 st Tx), and also indicates that there is reserved resource 1 for retransmission (as shown in Figure 6 or 7 as 2 nd Tx) ).
  • the receiving device can use the side link resource after the time slot where the reserved resource 1 is located.
  • the first symbol of the first time slot in the pool starts the drx-RetransmissionTimerSL and enters the active or on state.
  • the drx-RetransmissionTimerSL times out after the end of the last time slot of the 31st time slot in the side link resource pool.
  • the value of the second timer is determined according to the priority indicated by the third sidelink control information. For example, for different priorities, the candidate values corresponding to the second timer are different.
  • the corresponding drx-RetransmissionTimerSL value can be configured in the IE of the resource pool configuration.
  • different value lengths of drx-RetransmissionTimerSL can be configured.
  • the higher the priority the larger the value of drx-RetransmissionTimerSL.
  • the first terminal device receives fourth sidelink control information in the active or open state; after receiving the fourth sidelink control information and the fourth sidelink control information indicates In the case where the destination identifier, source identifier and hybrid automatic repeat request (HARQ) process identifier are the same as the destination identifier, source identifier and hybrid automatic repeat request (HARQ) process identifier indicated by the third side link control information, Stop the second timer.
  • HARQ hybrid automatic repeat request
  • the reselection resource for reselection of the first reserved resource by the second terminal device is located after the first reserved resource.
  • FIG. 9 is another example diagram of the discontinuous reception of the side link according to the embodiment of the present application, which shows that the SCI indicates that there are reserved resources for retransmission after the time slot where the SCI is located (for example, this indicates that the adjacent resources are within 32 adjacent resources) time slot) and the reserved resource is reselection due to collision, and HARQ-ACK is disabled (HARQ disabled).
  • the sending device sends an SCI to the receiving device (Rx UE) by sending resource 1 (shown as 1 st Tx in Figure 9); the SCI indicates that there are resources corresponding to PSSCH (that is, as As shown by 1 st Tx in Fig. 9), it also indicates that there is reserved resource 1 for retransmission after the time slot where the SCI is located (as shown by 2 nd Tx in Fig. 9).
  • the receiving device can start the drx-HARQ-RTT-TimerSL timer at the first symbol of the first time slot after the time slot where the SCI is located. As shown in FIG. 9 , the drx-HARQ-RTT-TimerSL timer expires after the end of the previous time slot of the time slot in which the reserved resource (ie, reserved resource 1) indicated by the SCI for next transmission is located.
  • the reserved resource ie, reserved resource 1
  • the drx-RetransmissionTimerSL timer is started, and the receiving device enters the active (active) or on (on) state. Received through retransmissions sent by reserved resource 1.
  • the receiving device does not receive PSCCH/PSSCH in reserved resource 1 (shown as 2 nd Tx in FIG. 7 ); then the drx-RetransmissionTimerSL timer continues to run.
  • the sending device may reselect the reserved resource 1, and the reselection resource (as shown in the reselected 2nd Tx in FIG. 9 ) is located in the reserved resource 1 (as shown in the 2nd Tx in FIG. 9 ) shown) after that.
  • the first timer and the second timer in the embodiments of the present application, and the inactive (inactive) or off (off) state, active (active) or on (on) state of the receiving device are exemplarily described above.
  • the present application is not limited to this.
  • the time slot in which the resource selected by the second terminal device for initial transmission is located is during the running period of a third timer, and the third timer runs periodically and is used by the first terminal device Used for discontinuous reception (DRX).
  • DRX discontinuous reception
  • the third timer may be defined as OnDurationTimer, and during the running period of the OnDurationTimer, the first terminal device is in an active (active) or an on (on) state.
  • the present application is not limited to this, for example, the third timer may also have other names or definitions.
  • the transmission resource 1 shown as 1 st Tx in FIG. 9
  • the sending device can obtain the DRX configuration of the receiving device, thereby ensuring that at least the time slot where the first resource of the selected resource is located is within the OnDurationTimer running period of the receiving device.
  • the receiving device receives the side link control information sent by the sending device, and performs discontinuous reception according to the reserved resources indicated in the side link control information; thus, the side link DRX mechanism can be implemented, so that the receiving device can Retransmission data from the transmitting device is received, and power consumption can be saved.
  • An embodiment of the present application provides a side link discontinuous receiving apparatus.
  • the apparatus may be, for example, a terminal device (eg, the aforementioned first terminal device), or one or some components or components configured in the terminal device, and the same contents as those of the first to third aspects will not be repeated.
  • FIG. 10 is a schematic diagram of a side link discontinuous receiving apparatus according to an embodiment of the present application.
  • the side link discontinuous receiving apparatus 1000 includes: a receiving unit 1001 and a processing unit 1002 .
  • the receiving unit 1001 receives the first side link control information sent by the second terminal device, where the first side link control information indicates that the time slot where the first side link control information is located is used after the reserved resources for retransmission; and the processing unit 1002 enables the first terminal device to be in an active or open state on the side link in the time slot where the reserved resources are located.
  • the first terminal device starting from the first symbol of the time slot in which the reserved resource is located, the first terminal device is activated or turned on on the side link, and continues for one time slot in the side link resource pool or multiple consecutive time slots.
  • the first terminal device may be in an inactive or off state on the side link.
  • the first terminal device is an intended receiving terminal of the first sidelink control information and/or the corresponding physical sidelink shared channel; wherein, in the first sidelink control information
  • the indicated destination identifier is the same as the identifier of the first terminal device, or the destination identifier includes the identifier of the first terminal device, or the first side link control information indicates that the first terminal device senses Interested business.
  • the processing unit 1002 receives the first time slot in the side link resource pool after the time slot in which the first side link control information is received from the first terminal device The first symbol of starts the first timer;
  • the first timer is drx-HARQ-RTT-TimerSL, and during the operation of the drx-HARQ-RTT-TimerSL, the first terminal device may be in an inactive or off state on the side link.
  • the value of the first timer is the number of time slots, and the number is the first time slot after the time slot in which the first side link control information is received from the first terminal device
  • the time slot in the side link resource pool is included in the period from the time slot in the previous side link resource pool to the time slot in the time slot in which the reserved resource for the next transmission indicated in the first side link control information is located.
  • the total number of time slots in the resource pool Every time a time slot in the side link resource pool passes, the value of the first timer is decremented by 1; when the value of the first timer reaches 0, the first timer times out.
  • the first sidelink control information indicates that HARQ is disabled, or the first sidelink control information indicates that HARQ is enabled and the In the case where the first terminal device feeds back a non-acknowledgement (NACK), in the next time slot in the side link resource pool after the first timer expires, the processing unit starts a second timing for the side link process and the first terminal device enters the activated or open state;
  • NACK non-acknowledgement
  • the second timer is drx-Retransmission TimerSL
  • the first terminal device is in an active or open state on the side link.
  • the second timer is started on the first symbol of the first time slot in the sidelink resource pool after the first timer expires.
  • the receiving unit 1001 further receives second sidelink control information in the active or open state; after receiving the second sidelink control information and the second sidelink control information indicates In the case where the destination identifier, source identifier and hybrid automatic repeat request (HARQ) process identifier are the same as the destination identifier, source identifier and hybrid automatic repeat request (HARQ) process identifier indicated by the first side link control information, The processing unit 1002 stops the second timer.
  • HARQ hybrid automatic repeat request
  • the first terminal device when the first side link control information indicates that HARQ is enabled, and the first terminal device feeds back an acknowledgment, the first terminal device transmits an acknowledgment from the first terminal device.
  • the first symbol of the time slot in the first side link resource pool after a timer expires may be in or kept in the inactive or off state on the side link.
  • the time slot in which the resource selected by the second terminal device for initial transmission is located is during the running period of a third timer, and the third timer runs periodically and is used by the first terminal device for discontinuous reception;
  • the third timer is OnDurationTimer, and during the running period of the OnDurationTimer, the first terminal device is in an active or open state on the side link.
  • the receiving unit 1001 receives the first side link control information sent by the second terminal device, and the first side link control information does not indicate that the first side link control information is used after the time slot in which the first side link control information is located. reserved resources for retransmission; and after the processing unit 1002 receives the first side link control information and passes through a predetermined number of time slots in the resource pool, the first terminal device is activated or turned on on the side link state.
  • the first terminal device may be in an inactive or off state on the side link.
  • the processing unit 1002 is in a first side link resource pool after a time slot in which the first side link control information is received from the first terminal device The first symbol of the time slot starts the first timer;
  • the first timer is drx-HARQ-RTT-TimerSL, and during the operation of the drx-HARQ-RTT-TimerSL, the first terminal device may be in an inactive or off state on the side link.
  • the value of the first timer is the number of time slots, and the number is the predetermined number of time slots in the side link resource pool. Every time a time slot in the side link resource pool passes, the value of the first timer is decremented by 1; when the value of the first timer reaches 0, the first timer times out.
  • the first sidelink control information indicates that HARQ is disabled, or the first sidelink control information indicates that HARQ is enabled and the In the case where the first terminal device feeds back a non-acknowledgement, the processing unit 1002 starts the side link process for the first symbol of the time slot in the next side link resource pool after the first timer expires The second timer causes the first terminal device to enter the activated or open state.
  • the second timer is started at the first symbol of the time slot in the first resource pool after the first timer expires, and the value of the second timer is a plurality of consecutive The number of time slots in the edge link resource pool. Every time a time slot in the side link resource pool passes, the value of the second timer is decremented by 1; when the value of the second timer reaches 0, the second timer times out.
  • the processing unit 1002 when the first side link control information indicates that HARQ is enabled, and the first terminal device feeds back an acknowledgment, after the first timer expires For the first symbol of the time slot in the next side link resource pool, the processing unit 1002 does not start the second timer for the side link process.
  • the processing unit 1002 determines whether to start the operation according to whether the side link control information in the physical side link shared channel corresponding to the first side link control information indicates whether there is still retransmission or the number of retransmissions the second timer.
  • the processing unit 1002 determines whether to start the second timer according to the priority and/or the channel busy rate indicated by the first sidelink control information.
  • the value of the second timer is determined according to the priority indicated by the first sidelink control information; for different priorities, the candidate values corresponding to the second timer are different.
  • the receiving unit 1001 receives the third sidelink control information sent by the second terminal device, where the third sidelink control information indicates that the time slot where the third sidelink control information is located is used after the the first reserved resource for retransmission; and when the processing unit 1002 does not receive the corresponding physical side link control channel on the first reserved resource, select the time slot where the first reserved resource is located The first symbol of the first time slot in the subsequent side link resource pool starts, so that multiple consecutive time slots in the side link resource pool of the first terminal device are activated or turned on.
  • the processing unit 1002 further starts a second timer for the side link process for the first symbol in the side link resource pool after the current time slot.
  • the number of the second timers is from From the first time slot in the side link resource pool after the time slot in which the first terminal device receives the first side link control information, to the time slot in the side link resource pool where the second reserved resource is located.
  • the value of the second timer is the predetermined number of time slots in the side link resource pool. Every time a time slot in the side link resource pool passes, the value of the second timer is decremented by 1; when the value of the second timer reaches 0, the second timer times out.
  • the apparatus 1000 for side link discontinuous reception may further include other components or modules, and for the specific content of these components or modules, reference may be made to the related art.
  • FIG. 10 only exemplarily shows the connection relationship or signal direction between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection can be used.
  • the above-mentioned components or modules may be implemented by hardware facilities such as processors, memories, transmitters, receivers, etc. The implementation of this application does not limit this.
  • the receiving device receives the side link control information sent by the sending device, and performs discontinuous reception according to the reserved resources indicated in the side link control information; thus, the side link DRX mechanism can be implemented, so that the receiving device can Retransmission data from the transmitting device is received, and power consumption can be saved.
  • An embodiment of the present application further provides a communication system, and reference may be made to FIG. 1 , and the same content as the embodiments of the first aspect to the fourth aspect will not be repeated.
  • the communication system 100 may include at least:
  • the first terminal device 102 which receives first side link control information, where the first side link control information indicates reserved resources for retransmission after the time slot where the first side link control information is located; And in the time slot where the reserved resource is located, it is in an active or open state on the side link;
  • the second terminal device 103 which sends the first side link control information.
  • the communication system 100 may include at least:
  • the first terminal device 102 which receives first side link control information, and the first side link control information does not indicate a reserved resource for retransmission after the time slot where the first side link control information is located; and after receiving the first side link control information and passing through a predetermined number of time slots in the resource pool, the side link is in an active or open state;
  • the second terminal device 103 which sends the first side link control information.
  • the communication system 100 may include at least:
  • the first terminal device 102 receives third sidelink control information, where the third sidelink control information indicates a first reservation for retransmission after the time slot where the third sidelink control information is located resources; and in the case where the corresponding physical side link control channel is not received on the first reserved resource, from the first time slot in the side link resource pool after the time slot where the first reserved resource is located Starting from the first symbol of the slot, multiple consecutive time slots in the side link resource pool are active or open;
  • the second terminal device 103 which sends the third sidelink control information.
  • the embodiment of the present application also provides a network device, which may be, for example, a base station, but the present application is not limited to this, and may also be other network devices.
  • a network device which may be, for example, a base station, but the present application is not limited to this, and may also be other network devices.
  • FIG. 11 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • the network device 1100 may include: a processor 1110 (eg, a central processing unit CPU) and a memory 1120 ; the memory 1120 is coupled to the processor 1110 .
  • the memory 1120 can store various data; in addition, the program 1130 for information processing is also stored, and the program 1130 is executed under the control of the processor 1110 .
  • the network device 1100 may further include: a transceiver 1140, an antenna 1150, etc.; wherein, the functions of the above components are similar to those in the prior art, and details are not repeated here. It is worth noting that the network device 1100 does not necessarily include all the components shown in FIG. 11 ; in addition, the network device 1100 may also include components not shown in FIG. 11 , and reference may be made to the prior art.
  • the embodiment of the present application also provides a terminal device, but the present application is not limited to this, and may also be other devices.
  • FIG. 12 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device 1200 may include a processor 1210 and a memory 1220 ; the memory 1220 stores data and programs, and is coupled to the processor 1210 .
  • this figure is exemplary; other types of structures may be used in addition to or in place of this structure to implement telecommunication functions or other functions.
  • the processor 1210 may be configured to execute a program to implement the side link discontinuous reception method described in the embodiment of the first aspect.
  • the processor 1210 may be configured to perform the following control: receive first side link control information, where the first side link control information indicates that the time slot in which the first side link control information is located is used for replaying and, in the time slot where the reserved resources are located, enabling the first terminal device to be in an active or open state on the side link.
  • the processor 1210 may be configured to execute a program to implement the side link discontinuous reception method according to the embodiment of the second aspect.
  • the processor 1210 may be configured to perform the following control: receive first side link control information, the first side link control information does not indicate that the time slot in which the first side link control information is located is used for replaying and after receiving the first side link control information and passing through a predetermined number of time slots in the resource pool, enabling the first terminal device to be in an active or open state on the side link.
  • the processor 1210 may be configured to execute a program to implement the side link discontinuous reception method according to the embodiment of the third aspect.
  • the processor 1210 may be configured to perform the following control: receive third sidelink control information, where the third sidelink control information indicates that the time slot in which the third sidelink control information is located is used for replaying the first reserved resource transmitted; and in the case where the corresponding physical side link control channel is not received on the first reserved resource, the side link from the time slot after the first reserved resource is located Starting with the first symbol of the first time slot in the resource pool, multiple consecutive time slots in the side link resource pool make the first terminal device in an active or open state.
  • the terminal device 1200 may further include: a communication module 1230 , an input unit 1240 , a display 1250 , and a power supply 1260 .
  • the functions of the above components are similar to those in the prior art, and details are not repeated here. It is worth noting that the terminal device 1200 does not necessarily include all the components shown in FIG. 12 , and the above components are not required; in addition, the terminal device 1200 may also include components not shown in FIG. 12 . There is technology.
  • An embodiment of the present application further provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to execute the side link discontinuous reception method described in the embodiments of the first to third aspects .
  • Embodiments of the present application further provide a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the side link discontinuous reception method described in the embodiments of the first to third aspects.
  • the apparatuses and methods above in the present application may be implemented by hardware, or may be implemented by hardware combined with software.
  • the present application relates to a computer-readable program that, when executed by logic components, enables the logic components to implement the above-described apparatus or constituent components, or causes the logic components to implement the above-described various methods or steps.
  • the present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, and the like.
  • the method/apparatus described in conjunction with the embodiments of this application may be directly embodied as hardware, a software module executed by a processor, or a combination of the two.
  • one or more of the functional block diagrams shown in the figures and/or one or more combinations of the functional block diagrams may correspond to either software modules or hardware modules of the computer program flow.
  • These software modules may respectively correspond to the various steps shown in the figure.
  • These hardware modules can be implemented by, for example, solidifying these software modules using a Field Programmable Gate Array (FPGA).
  • FPGA Field Programmable Gate Array
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.
  • a storage medium can be coupled to the processor, such that the processor can read information from, and write information to, the storage medium; or the storage medium can be an integral part of the processor.
  • the processor and storage medium may reside in an ASIC.
  • the software module can be stored in the memory of the mobile terminal, or can be stored in a memory card that can be inserted into the mobile terminal.
  • the software module can be stored in the MEGA-SIM card or a large-capacity flash memory device.
  • the functional blocks and/or one or more combinations of the functional blocks described in the figures can be implemented as a general-purpose processor, a digital signal processor (DSP) for performing the functions described in this application ), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any suitable combination thereof.
  • DSP digital signal processor
  • ASICs Application Specific Integrated Circuits
  • FPGAs Field Programmable Gate Arrays
  • One or more of the functional blocks and/or one or more combinations of the functional blocks described with respect to the figures can also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors processor, one or more microprocessors in communication with the DSP, or any other such configuration.
  • a side link discontinuous reception method comprising:
  • the first terminal device receives the first side link control information sent by the second terminal device, where the first side link control information indicates a preamble for retransmission after the time slot where the first side link control information is located. resources;
  • the first terminal device is in an active (active) or an on (on) state on the side link in the time slot where the reserved resource is located.
  • Supplement 2 The method according to Supplement 1, wherein, starting from the first symbol of the time slot where the reserved resource is located, the first terminal device is activated or turned on on the side link, and continues on the side link. A time slot or multiple consecutive time slots within a link resource pool.
  • Supplement 4 The method according to any one of Supplements 1 to 3, wherein the first terminal device is the first sidelink control information and/or the corresponding physical sidelink shared channel (PSSCH) The intended receiving terminal.
  • PSSCH physical sidelink shared channel
  • Supplement 5 The method according to Supplement 4, wherein the destination identifier indicated in the first side link control information is the same as the identifier of the first terminal device, or the destination identifier includes the first side link control information.
  • An identifier of a terminal device, or the first side link control information indicates a service of interest to the first terminal device.
  • Supplement 6 The method according to Supplement 3, wherein, for the side link process, the first terminal device receives the first side link control information from the first terminal device after the time slot of the time slot.
  • the first symbol of the time slot in the first side link resource pool starts the first timer.
  • Supplement 7 The method according to Supplement 6, wherein the first timer is drx-HARQ-RTT-TimerSL, and during the operation of the drx-HARQ-RTT-TimerSL, the first terminal device is The edge link is in an inactive or off state.
  • Supplement 8 The method according to Supplement 6, wherein the value of the first timer is the number of time slots, and the number is the first side link received from the first terminal device The first time slot in the side link resource pool after the time slot of the control information, to the previous side link of the time slot where the reserved resources for next transmission indicated in the first side link control information are located The total number of time slots in the resource pool included in the time slot period in the resource pool;
  • the value of the first timer is decremented by 1 every time a time slot of the side link resource pool passes.
  • Supplement 9 The method according to any one of Supplements 6 to 8, wherein the method further comprises:
  • the first side link control information indicates that HARQ is disabled, or the first side link control information indicates that HARQ is enabled and the first terminal equipment feedback
  • NACK non-acknowledgement
  • Supplement 10 The method according to Supplement 9, wherein the second timer is a drx-Retransmission TimerSL, and during the operation of the drx-RetransmissionTimerSL, the first terminal device is active on the side link ( active) or open (on) state.
  • the second timer is a drx-Retransmission TimerSL
  • the first terminal device is active on the side link ( active) or open (on) state.
  • Supplement 12 The method according to any one of Supplements 9 to 11, wherein the value of the second timer is 1.
  • Supplementary Note 13 The method according to any one of Supplementary Notes 9 to 11, wherein the method further comprises:
  • the second timer is stopped.
  • Supplement 14 The method according to any one of Supplements 6 to 8, wherein the method further comprises:
  • the first side link control information indicates that hybrid automatic repeat request (HARQ) is enabled, and the first terminal device feeds back an acknowledgment (ACK), the first terminal device in the first terminal device After a timer expires, the first symbol of the time slot in the first side link resource pool is in (or maintained) the inactive or off state on the side link.
  • HARQ hybrid automatic repeat request
  • ACK acknowledgment
  • Supplement 15 The method according to Supplement 14, wherein the second timer is not started for the first symbol in the side link resource pool after the first timer expires.
  • Supplementary Note 16 The method according to any one of Supplementary Notes 1 to 15, wherein the time slot where the resource for initial transmission selected by the second terminal device is located is during the running period of the third timer, and the first A three timer runs periodically and is used by the first terminal device for discontinuous reception (DRX).
  • Supplement 17 The method according to Supplement 16, wherein the third timer is OnDurationTimer, and during the running period of the OnDurationTimer, the first terminal device is active (active) or on (on) on the side link. on) state.
  • a side link discontinuous reception method comprising:
  • the first terminal device receives the first side link control information sent by the second terminal device, and the first side link control information does not indicate the preamble for retransmission after the time slot where the first side link control information is located. resources;
  • the first terminal device is in an active or open state on the side link after receiving the first side link control information and passing through a predetermined number of time slots in the resource pool.
  • the first terminal device From the first symbol of the first time slot in the side link resource pool after the time slot in which the first side link control information is received, to the side chain after the time slot where the first side link control information is located.
  • the last symbol of the predetermined number of time slots in the road resource pool the first terminal device is in an inactive or off state on the side link.
  • Supplement 20 The method according to Supplement 18 or 19, wherein the first terminal device is the first side link control information and/or the corresponding physical side link shared channel (PSSCH) intent ( intended) receiving terminal.
  • PSSCH physical side link shared channel
  • Supplement 21 The method according to Supplement 20, wherein the destination identifier indicated in the first side link control information is the same as the identifier of the first terminal device, or the destination identifier includes the first side link control information.
  • An identifier of a terminal device, or the first side link control information indicates a service of interest to the first terminal device.
  • Supplement 22 The method according to Supplement 19, wherein, for the side link process, the first terminal device receives the first side link control information from the first terminal device after the time slot of the time slot.
  • the first symbol of the time slot in the first side link resource pool starts the first timer.
  • Supplementary note 23 The method according to supplementary note 22, wherein the first timer is drx-HARQ-RTT-TimerSL, and during the operation of the drx-HARQ-RTT-TimerSL, the first terminal device is The edge link is in an inactive or off state.
  • Supplement 24 The method according to Supplement 22, wherein the value of the first timer is the number of time slots, and the number is the predetermined number of time slots in the side link resource pool; For resource pool time slots, the value of the first timer is decremented by 1.
  • Supplementary note 25 The method according to supplementary note 24, wherein the number of predetermined time slots in the side link resource pool is 31.
  • Supplement 26 The method according to any one of Supplementary Notes 22 to 25, wherein the method further comprises:
  • the first side link control information indicates that HARQ is disabled, or the first side link control information indicates that HARQ is enabled and the first terminal equipment feedback
  • NACK non-acknowledgement
  • Supplementary note 27 The method according to supplementary note 26, wherein the second timer is drx-Retransmission TimerSL, and during the operation of the drx-RetransmissionTimerSL, the first terminal device is active on the side link ( active) or open (on) state.
  • Supplementary note 28 The method according to supplementary note 26 or 27, wherein the second timer is started at the first symbol of the time slot in the first resource pool after the first timer expires, and the The value of the second timer is the number of time slots in multiple consecutive side link resource pools; the value of the second timer decreases by 1 each time a time slot in the side link resource pool passes.
  • Supplementary Note 29 The method according to any one of Supplementary Notes 26 to 28, wherein the method further comprises:
  • the first terminal device indicates, according to the side link control information (2 nd stage SCI) in the physical side link shared channel (PSSCH) corresponding to the first side link control information, whether there are retransmissions or the number of retransmissions , and determine whether to start the second timer.
  • side link control information (2 nd stage SCI) in the physical side link shared channel (PSSCH) corresponding to the first side link control information
  • Supplement 30 The method according to any one of Supplementary Notes 26 to 28, wherein the method further comprises:
  • the first terminal device determines whether to start the second timer according to the priority and/or the channel busy rate (CBR, Channel Busy Rate) indicated by the first side link control information.
  • CBR Channel Busy Rate
  • Supplement 31 The method according to Supplement 30, wherein the value of the second timer is determined according to the priority indicated by the first sidelink control information.
  • Supplement 32 The method according to Supplement 31, wherein for different priorities, the candidate values corresponding to the second timer are different.
  • Supplement 33 The method according to any one of Supplements 26 to 32, wherein the method further comprises:
  • the second timer is stopped.
  • Supplement 34 The method according to any one of Supplements 22 to 25, wherein the method further comprises:
  • the first side link control information indicates that hybrid automatic repeat request (HARQ) is enabled, and the first terminal device feeds back an acknowledgment (ACK), the first terminal device in the first terminal device.
  • HARQ hybrid automatic repeat request
  • ACK acknowledgment
  • Supplement 35 The method according to Supplement 34, wherein the second timer is not activated for the first symbol of the time slot in the first side link resource pool after the first timer expires.
  • Supplement 36 The method according to any one of Supplementary Notes 18 to 35, wherein the time slot where the resource selected by the second terminal device for initial transmission is located is during the running period of a third timer, and the first A three timer runs periodically and is used by the first terminal device for discontinuous reception (DRX).
  • Supplement 37 The method according to Supplement 36, wherein the third timer is OnDurationTimer, and during the running period of the OnDurationTimer, the first terminal device is in an active (active) or on (on) state.
  • a side link discontinuous reception method comprising:
  • the first terminal device receives the third side link control information sent by the second terminal device, and the third side link control information indicates the third side link control information used for retransmission after the time slot where the third side link control information is located. a reserved resource;
  • the first terminal device starts from the side link after the time slot where the first reserved resource is located. Beginning with the first symbol of the first time slot in the resource pool, multiple consecutive time slots in the side link resource pool are in an active or open state.
  • PSCCH physical side link control channel
  • Supplement 39 The method according to Supplement 38, wherein the first terminal device is the intent of the third sidelink control information and/or the corresponding physical sidelink shared channel (PSSCH). receiving terminal.
  • PSSCH physical sidelink shared channel
  • Supplement 40 The method according to Supplement 39, wherein the destination identifier indicated in the third sidelink control information is the same as the identifier of the first terminal device, or the destination identifier includes the first terminal device.
  • An identifier of a terminal device, or the third sidelink control information indicates a service of interest to the first terminal device.
  • Supplement 41 The method according to any one of Supplementary Notes 38 to 40, wherein the first terminal device further starts the first symbol in the side link resource pool after the current time slot for the side link process. Two timers.
  • Supplement 42 The method according to Supplement 41, wherein the second timer is drx-RetransmissionTimer SL, and during the operation of the drx-RetransmissionTimer SL, the first terminal device is active (active) or turned on ( on) state.
  • Supplement 43 The method according to Supplement 41, wherein, in the case that there are second reserved resources for the retransmission after the first terminal device learns the first reserved resources, the The value of the second timer is from the first time slot in the side link resource pool after the time slot when the first terminal device receives the first side link control information to the first time slot in the side link resource pool to the first time slot in the side link resource pool. 2. The total number of time slots in the resource pool included in the time slot in which the reserved resources are located; each time a time slot in the side link resource pool passes, the value of the second timer is decremented by 1.
  • Supplement 44 The method according to Supplement 41, wherein after the first terminal device learns the first reserved resource, there is no second reserved resource for the retransmission, or the first reserved resource is not available for the retransmission.
  • the value of the second timer is the predetermined number of time slots in the side link resource pool; each time a time slot in the side link resource pool passes, the value of the second timer is decremented by 1 .
  • Supplement 45 The method according to Supplement 44, wherein the number of predetermined time slots in the side link resource pool is 31.
  • Supplement 46 The method according to Supplement 41, wherein the value of the second timer is determined according to the priority indicated by the third sidelink control information.
  • Supplement 47 The method according to any one of Supplements 38 to 46, wherein the method further comprises:
  • the second timer is stopped.
  • Supplement 48 The method according to any one of Supplementary Notes 38 to 47, wherein the time slot where the resource selected by the second terminal device for initial transmission is located is during the running period of a third timer, and the first A three timer runs periodically and is used by the first terminal device for discontinuous reception (DRX).
  • Supplement 49 The method according to Supplement 48, wherein the third timer is OnDurationTimer, and during the running period of the OnDurationTimer, the first terminal device is active or on (active) on the side link. on) state.
  • Supplement 50 The method according to any one of Supplements 38 to 49, wherein the reselection resource for reselection of the first reserved resource by the second terminal device is located in the first reserved resource after.
  • a terminal device comprising a memory and a processor, wherein the memory stores a computer program, the processor is configured to execute the computer program to implement the side according to any one of Supplementary Notes 1 to 50 Link discontinuous reception method.
  • a communication system comprising:
  • a first terminal device which receives first side link control information, where the first side link control information indicates reserved resources for retransmission after the time slot where the first side link control information is located; and in the active or open state on the side link in the time slot where the reserved resource is located;
  • a second terminal device that transmits the first side link control information.
  • a communication system comprising:
  • a first terminal device which receives first side link control information, the first side link control information does not indicate reserved resources for retransmission after the time slot where the first side link control information is located; and After receiving the first side link control information and passing through a predetermined number of time slots in the resource pool, the side link is in an active or open state;
  • a second terminal device that transmits the first side link control information.
  • a communication system comprising:
  • a first terminal device which receives third side link control information, where the third side link control information indicates a first reserved resource for retransmission after the time slot where the third side link control information is located and under the situation that the corresponding physical side link control channel is not received on the first reserved resource, from the first time slot in the side link resource pool after the time slot where the first reserved resource is located Starting from the first symbol of , multiple consecutive time slots in the side link resource pool are active or open;
  • a second terminal device that transmits the third sidelink control information.

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Abstract

本申请实施例提供一种边链路非连续接收方法以及装置。所述方法包括：第一终端设备接收第二终端设备发送的第一边链路控制信息，所述第一边链路控制信息中指示有所述第一边链路控制信息所在时隙后用于重传的预留资源；以及所述第一终端设备在所述预留资源所在时隙，在边链路上处于激活(active)或开启(on)状态。

Description

边链路非连续接收方法及装置 技术领域
本申请实施例涉及通信技术领域。
背景技术
在Rel-15以及之前版本的车联网(V2X，Vehicle to Everything)通信中，支持边链路(Sidelink)资源的两种分配方式：Mode 1和Mode 2。对于Mode 1，边链路资源由网络设备(例如基站)进行分配而获得；对于Mode 2，终端设备自主地选择发送资源，即发送资源通过感知(sensing)或检测-资源选择过程获得。
另一方面，新无线(NR，New Radio)V2X是目前Rel-16标准化的研究项目之一，相比于长期演进(LTE，Long Term Evolution)V2X，NR V2X需要支持诸多新场景和新业务(例如远程驾驶、自动驾驶和车队行驶等)，需要满足更高的技术指标(高可靠、低时延、高数据速率等)。
NR V2X定义的物理信道包括物理边链路控制信道(PSCCH，Physical Sidelink Control Channel)、物理边链路共享信道(PSSCH，Physical Sidelink Shared Channel)和物理边链路反馈信道(PSFCH，Physical Sidelink Feedback Channel)。PSCCH承载第一级(1st stage)边链路控制信息(SCI，Sidelink Control Informaiton)，1st stage SCI主要用于预留资源。PSSCH承载第二级(2nd stage)SCI以及传输块(TB，Transport Block)，2nd stage SCI主要用于TB解调。PSFCH承载边链路反馈信息(可称为HARQ-ACK)。边链路发送所使用的资源(时频资源)位于某一资源池内。
应该注意，上面对技术背景的介绍只是为了方便对本申请的技术方案进行清楚、完整的说明，并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本申请的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
发明人发现：根据Rel-17 V2X的立项文件(WID，work item description)，需要对边链路非连续接收(DRX，Discontinuous Reception)进行研究。由于在边链路上特别是针对Mode 2，重传资源不再由网络设备分配，而是由发送设备(Tx UE)在资源池(resource pool)内选择的，目前没有针对边链路DRX机制的解决方案。
针对上述问题的至少之一，本申请实施例提供一种边链路非连续接收方法及装置。
根据本申请实施例的一个方面，提供一种边链路非连续接收方法，包括：
第一终端设备接收第二终端设备发送的第一边链路控制信息，所述第一边链路控制信息中指示有所述第一边链路控制信息所在时隙后用于重传的预留资源；以及
所述第一终端设备在所述预留资源所在时隙，在边链路上处于激活或开启状态。
根据本申请实施例的另一个方面，提供一种边链路非连续接收装置，配置于第一终端设备，所述装置包括：
接收单元，其接收第二终端设备发送的第一边链路控制信息，所述第一边链路控制信息中指示有所述第一边链路控制信息所在时隙后用于重传的预留资源；以及
处理单元，其在所述预留资源所在时隙，使所述第一终端设备在边链路上处于激活或开启状态。
根据本申请实施例的另一个方面，提供一种边链路非连续接收方法，包括：
第一终端设备接收第二终端设备发送的第一边链路控制信息，所述第一边链路控制信息中没有指示所述第一边链路控制信息所在时隙后用于重传的预留资源；以及
所述第一终端设备在接收到所述第一边链路控制信息并经过资源池内预定时隙数目之后，在边链路上处于激活或开启状态。
根据本申请实施例的另一个方面，提供一种边链路非连续接收装置，配置于第一终端设备，所述装置包括：
接收单元，其接收第二终端设备发送的第一边链路控制信息，所述第一边链路控制信息中没有指示所述第一边链路控制信息所在时隙后用于重传的预留资源；以及
处理单元，其在接收到所述第一边链路控制信息并经过资源池内预定时隙数目之后，使所述第一终端设备在边链路上处于激活或开启状态。
根据本申请实施例的另一个方面，提供一种边链路非连续接收方法，包括：
第一终端设备接收第二终端设备发送的第三边链路控制信息，所述第三边链路控制信息中指示有所述第三边链路控制信息所在时隙后用于重传的第一预留资源；以及
在所述第一预留资源上没有接收到对应的物理边链路控制信道(PSCCH)的情况下，所述第一终端设备从所述第一预留资源所在的时隙之后的边链路资源池内第一个时隙的第一个符号开始，在边链路资源池内的多个连续时隙处于激活或开启状态。
根据本申请实施例的另一个方面，提供一种边链路非连续接收装置，配置于第一终端设备，所述装置包括：
接收单元，其接收第二终端设备发送的第三边链路控制信息，所述第三边链路控制信息中指示有所述第三边链路控制信息所在时隙后用于重传的第一预留资源；以及
处理单元，其在所述第一预留资源上没有接收到对应的物理边链路控制信道的情况下，从所述第一预留资源所在的时隙之后的边链路资源池内第一个时隙的第一个符号开始，使所述第一终端设备在边链路资源池内的多个连续时隙处于激活或开启状态。
本申请实施例的有益效果之一在于：接收设备接收发送设备发送的边链路控制信息，根据边链路控制信息中指示的预留资源进行针对重传的非连续接收；由此能够实现边链路DRX机制，使得接收设备能够接收到发送设备的重传数据，并且能够节省功耗。
参照后文的说明和附图，详细公开了本申请的特定实施方式，指明了本申请的原理可以被采用的方式。应该理解，本申请的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内，本申请的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的特征。
应该强调，术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在，但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
在本申请实施例的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外，在附图中，类似的标号表示几个附图中对应的部件，并可用于指示多于一种实施方式中使用的对应部件。
图1是本申请实施例的通信系统的示意图；
图2是本申请实施例的边链路非连续接收方法的一示意图；
图3是本申请实施例的边链路非连续接收的一示例图；
图4是本申请实施例的边链路非连续接收的另一示例图；
图5是本申请实施例的边链路非连续接收方法的一示意图；
图6是本申请实施例的边链路非连续接收的一示例图；
图7是本申请实施例的边链路非连续接收的另一示例图；
图8是本申请实施例的边链路非连续接收方法的一示意图；
图9是本申请实施例的边链路非连续接收的一示例图；
图10是本申请实施例的边链路非连续接收装置的一示意图；
图11是本申请实施例的网络设备的示意图；
图12是本申请实施例的终端设备的示意图。
具体实施方式
参照附图，通过下面的说明书，本申请的前述以及其它特征将变得明显。在说明书和附图中，具体公开了本申请的特定实施方式，其表明了其中可以采用本申请的原则的部分实施方式，应了解的是，本申请不限于所描述的实施方式，相反，本申请包括落入所附权利要求的范围内的全部修改、变型以及等同物。
在本申请实施例中，术语“第一”、“第二”等用于对不同元素从称谓上进行区分，但并不表示这些元素的空间排列或时间顺序等，这些元素不应被这些术语所限制。术语“和/或”包括相关联列出的术语的一种或多个中的任何一个和所有组合。术语“包含”、“包括”、“具有”等是指所陈述的特征、元素、元件或组件的存在，但并不排除存在或添加一个或多个其他特征、元素、元件或组件。
在本申请实施例中，单数形式“一”、“该”等包括复数形式，应广义地理解为“一种”或“一类”而并不是限定为“一个”的含义；此外术语“所述”应理解为既包括单数形式也包括复数形式，除非上下文另外明确指出。此外术语“根据”应理解为“至少部分根据……”，术语“基于”应理解为“至少部分基于……”，除非上下文另外明确指出。
在本申请实施例中，术语“通信网络”或“无线通信网络”可以指符合如下任意通信标准的网络，例如长期演进(LTE，Long Term Evolution)、增强的长期演进(LTE-A，LTE-Advanced)、宽带码分多址接入(WCDMA，Wideband Code Division Multiple Access)、高速报文接入(HSPA，High-Speed Packet Access)等等。
并且，通信系统中设备之间的通信可以根据任意阶段的通信协议进行，例如可以包括但不限于如下通信协议：1G(generation)、2G、2.5G、2.75G、3G、4G、4.5G以及5G、新无线(NR，New Radio)等等，和/或其他目前已知或未来将被开发的通信协议。
在本申请实施例中，术语“网络设备”例如是指通信系统中将终端设备接入通信网络并为该终端设备提供服务的设备。网络设备可以包括但不限于如下设备：基站(BS，Base Station)、接入点(AP、Access Point)、发送接收点(TRP，Transmission Reception Point)、广播发射机、移动管理实体(MME、Mobile Management Entity)、网关、服务器、无线网络控制器(RNC，Radio Network Controller)、基站控制器(BSC，Base Station Controller)等等。
其中，基站可以包括但不限于：节点B(NodeB或NB)、演进节点B(eNodeB或eNB)以及5G基站(gNB)，等等，此外还可包括远端无线头(RRH，Remote Radio Head)、远端无线单元(RRU，Remote Radio Unit)、中继(relay)或者低功率节点(例如femeto、pico等等)。并且术语“基站”可以包括它们的一些或所有功能，每个基站可以对特定的地理区域提供通信覆盖。术语“小区”可以指的是基站和/或其覆盖区域，这取决于使用该术语的上下文。
在本申请实施例中，术语“用户设备”(UE，User Equipment)或者“终端设备”(TE，Terminal Equipment或Terminal Device)例如是指通过网络设备接入通信网络并接收网络服务的设备。终端设备可以是固定的或移动的，并且也可以称为移动台(MS，Mobile Station)、终端、用户台(SS，Subscriber Station)、接入终端(AT，Access Terminal)、站，等等。
其中，终端设备可以包括但不限于如下设备：蜂窝电话(Cellular Phone)、个人数字助理(PDA，Personal Digital Assistant)、无线调制解调器、无线通信设备、手持设备、机器型通信设备、膝上型计算机、无绳电话、智能手机、智能手表、数字相机，等等。
再例如，在物联网(IoT，Internet of Things)等场景下，终端设备还可以是进行监控或测量的机器或装置，例如可以包括但不限于：机器类通信(MTC，Machine Type Communication)终端、车载通信终端、设备到设备(D2D，Device to Device)终端、机器到机器(M2M，Machine to Machine)终端，等等。
此外，术语“网络侧”或“网络设备侧”是指网络的一侧，可以是某一基站，也可以包括如上的一个或多个网络设备。术语“用户侧”或“终端侧”或“终端设备侧”是指用户或终端的一侧，可以是某一UE，也可以包括如上的一个或多个终端设备。本文在没有特别指出的情况下，“设备”可以指网络设备，也可以指终端设备。
以下通过示例对本申请实施例的场景进行说明，但本申请不限于此。
图1是本申请实施例的通信系统的示意图，示意性说明了以终端设备和网络设备为例的情况，如图1所示，通信系统100可以包括网络设备101和终端设备102、103。为简单起见，图1仅以两个终端设备和一个网络设备为例进行说明，但本申请实施例不限于此。
在本申请实施例中，网络设备101和终端设备102、103之间可以进行现有的业务或者未来可实施的业务发送。例如，这些业务可以包括但不限于：增强的移动宽带(eMBB，enhanced Mobile Broadband)、大规模机器类型通信(mMTC，massive Machine Type  Communication)和高可靠低时延通信(URLLC，Ultra-Reliable and Low-Latency Communication)，等等。
值得注意的是，图1示出了两个终端设备102、103均处于网络设备101的覆盖范围内，但本申请不限于此。两个终端设备102、103可以均不在网络设备101的覆盖范围内，或者一个终端设备102在网络设备101的覆盖范围之内而另一个终端设备103在网络设备101的覆盖范围之外。
在本申请实施例中，两个终端设备102、103之间可以进行边链路发送。例如，两个终端设备102、103可以都在网络设备101的覆盖范围之内进行边链路发送以实现V2X通信，也可以都在网络设备101的覆盖范围之外进行边链路发送以实现V2X通信，还可以一个终端设备102在网络设备101的覆盖范围之内而另一个终端设备103在网络设备101的覆盖范围之外进行边链路发送以实现V2X通信。
在本申请实施例中，终端设备102和/或103可以自主选择边链路资源(即采用Mode2)，在这种情况下边链路发送可以与网络设备101无关，即网络设备101是可选的。当然，本申请实施例也可以将自主选择边链路资源(即采用Mode 2)和由网络设备分配边链路资源(即采用Mode 1)结合起来；本申请实施例不对此进行限制。
在V2X中，终端设备能够通过感知检测+资源选择的过程来获得边链路发送资源，其中可以持续不断地进行感知(sensing)来获得资源池内资源的占用情况。例如，终端设备可以根据前一段时间内(称为感知窗)的资源占用情况来估计后一段时间内(称为选择窗)的资源占用情况。关于NR V2X中感知检测+资源选择的过程，还可以参考3GPP TS 36.213 V15.2.0中第14.1.1.6等处的内容。
在本申请实施例中，以V2X为例对边链路进行说明，但本申请不限于此，还可以适用于V2X以外的边链路发送场景。在以下的说明中，在不引起混淆的情况下，术语“边链路”和“V2X”可以互换，术语“PSFCH”和“边链路反馈信道”可以互换，术语“PSCCH”和“边链路控制信道”或“边链路控制信息”可以互换，术语“PSSCH”和“边链路数据信道”或“边链路数据”也可以互换。
另外，发送(transmitting)或接收(receiving)PSCCH可以理解为发送或接收由PSCCH承载的边链路控制信息；发送或接收PSSCH可以理解为发送或接收由PSSCH承载的边链路数据；发送或接收PSFCH可以理解为发送或接收由PSFCH承载的边链路反馈信息。边链路发送(Sidelink transmission，也可称为边链路传输)可以理解为PSCCH/PSSCH发送或者边链路数据/信息发送。
第一方面的实施例
本申请实施例提供一种边链路非连续接收方法，从第一终端设备进行说明。其中第二终端设备可以向第一终端设备发送边链路数据，因此第二终端设备需要进行资源选择以确定边链路数据的发送资源。从边链路数据发送的角度，本申请实施例的第二终端设备为发送设备，第一终端设备为接收设备。
图2是本申请实施例的边链路非连续接收方法的一示意图，如图2所示，该方法包括：
201，第一终端设备接收第二终端设备发送的第一边链路控制信息，所述第一边链路控制信息中指示有所述第一边链路控制信息所在时隙后用于重传的预留资源；以及
202，第一终端设备在所述预留资源所在时隙，在边链路上处于激活(active)或开启(on)状态。
值得注意的是，以上附图2仅对本申请实施例进行了示意性说明，但本申请不限于此。例如可以适当地调整各个操作之间的执行顺序，此外还可以增加其他的一些操作或者减少其中的某些操作。本领域的技术人员可以根据上述内容进行适当地变型，而不仅限于上述附图2的记载。
在本申请实施例中，终端设备可以进行边链路DRX。具体地，例如终端设备可以在边链路上处于激活(active)或开启(on)状态，在该状态下终端设备在对应的接收资源池内进行PSCCH检测；终端设备还可以在边链路上处于非激活(inactive)或关闭(off)状态，在该状态下终端设备不在对应的接收资源池内进行PSCCH检测。本申请实施例不限于此，关于DRX机制还可以参考相关技术。
在一些实施例中，第一终端设备为所述第一边链路控制信息和/或对应的PSSCH的意向(intended)接收终端。例如，所述第一边链路控制信息中指示的目的标识与所述第一终端设备的标识相同(对应的业务为单播)，或者，所述目的标识包括所述第一终端设备的标识(对应的业务为组播)，或者，所述第一边链路控制信息指示所述第一终端设备感兴趣的业务(对应的业务为广播)。
例如，UE 1可以对PSCCH进行盲检，在盲检到某一SCI中的destination ID与本身UE ID相同，或者destination ID包括本身UE ID，或者该SCI指示了UE 1感兴趣的业务，则UE 1认为该SCI是发送给自己的SCI，可以根据该SCI进行处理。
在本申请实施例中，第一边链路控制信息以及后述的第二至第四边链路控制信息是 由PSCCH或PSSCH承载的SCI，但本申请不限于此。此外，当前时隙例如是第一边链路控制信息对应的PSCCH和/或PSSCH所在的时隙。
以下针对某一个边链路进程进行说明，在使用定时器(timer)时，定时器是针对每个进程分别启动/停止的，即终端设备针对不同进程可以分别配置定时器，每种定时器可以有多个。对于多个边链路进程的情况，终端设备可以按照合集进行处理。例如，如果UE 1有多个边链路进程，如果针对某一个边链路进程需要被激活或开启，则该UE 1就应该处于激活或开启状态。
在本申请实施例中，通过SCI中指示的预留资源，第一终端设备可以在该预留资源的时间位置被激活(active)或开启(on)，并在该时间位置进行边链路信息(例如PSCCH/PSSCH)的接收，由此实现V2X DRX机制。
在一些实施例中，从接收到所述第一边链路控制信息的时隙之后的边链路资源池内第一个时隙的第一个符号，到在所述第一边链路控制信息中指示的用于下一次发送的预留资源所在时隙的前一个边链路资源池内时隙的最后一个符号，第一终端设备可以进入非激活(inactive)或关闭(off)状态。
例如，UE 1在时隙1接收到UE 2发送的某一SCI后，如果该SCI指示了对应的PSSCH(处于资源池内的时隙1中)以及预留资源1(处于资源池内的时隙2中)，则该UE 1可以确定在时隙1至时隙2之间的时间内，UE 2不会再发送边链路信息或边链路数据，则UE 1可以进入非激活(inactive)或关闭(off)状态，由此能够节约功耗并实现V2X DRX机制。
在一些实施例中，从所述预留资源所在时隙的第一个符号开始，第一终端设备在边链路上被激活或开启，并且持续(或保持)边链路资源池内的一个时隙或多个连续时隙。
例如，在所述第一边链路控制信息指示混合自动重传请求(HARQ，Hybrid Automatic Repeat reQuest)被去使能，或者在所述第一边链路控制信息指示混合自动重传请求被使能且所述第一终端设备反馈了非确认(NACK)的情况下，从所述预留资源所在时隙的第一个符号开始，第一终端设备在边链路上被激活或开启。
再例如，在所述第一边链路控制信息指示混合自动重传请求被使能，并且所述第一终端设备反馈了确认(ACK)的情况下，从所述预留资源所在时隙的第一个符号开始，第一终端设备在边链路上可以处于(或保持)非激活或关闭状态。
以下将以定时器为例对本申请进行进一步说明，但本申请不限于此，也可以使用其他非定时器机制。此外，与本申请实施例中DRX或定时器相关的时隙等只考虑边链路 资源池内的时隙，定时器的“启动”“停止”“超时”等均是针对边链路资源池内的时隙而言。对于不包含在边链路资源池内的时隙，即边链路不能使用的时隙，已经运行的定时器应该为“挂起”或“pengding”状态。
对于定时器的运行时间长度，以包含在边链路资源池内的时隙个数计算，也可以转换成对应的毫秒值。对于不包含在边链路资源池内的时隙，计算定时器的时间长度时并不计算在内，即此时定时器应该挂起(或pending)，不对这些资源池外时隙进行计数。
对于时隙和毫秒的转换，以下以发送设备进行感知和资源选择时的时隙为例说明。例如，M′是M转换到逻辑时隙(logical slot)之后的对应时隙个数，M是定时器的实际时间长度对应的时隙个数，如下式(1)所述：
Figure PCTCN2020123006-appb-000001
其中，N为20ms内能够被用于边链路发送的时隙的个数。以上仅示意性说明了时隙和毫秒的转换，具体内容还可以参考相关技术。
在一些实施例中，第一终端设备针对所述边链路进程启动第一定时器。例如，第一定时器可以定义为drx-HARQ-RTT-TimerSL，在drx-HARQ-RTT-TimerSL运行期间第一终端设备可以处于非激活(inactive)或关闭(off)状态；但第一终端设备是否进入非激活(inactive)或关闭(off)状态还需要考虑其他因素，例如其他边链路进程的情况。本申请不限于此，例如第一定时器还可以是其他名称或定义。
例如，第一定时器的值为时隙个数；该个数为从第一终端设备接收到所述第一边链路控制信息的时隙之后的第一个边链路资源池内时隙，到在所述第一边链路控制信息中指示的用于下一次发送的预留资源所在时隙的前一个边链路资源池内时隙的期间所包含的资源池内时隙的总数。每经过一个边链路资源池内时隙，所述第一定时器的值减1；当第一定时器的值到达0后，该第一定时器超时。
在一些实施例中，在所述第一边链路控制信息指示混合自动重传请求被去使能，或者在所述第一边链路控制信息指示混合自动重传请求被使能且所述第一终端设备反馈了非确认(NACK)的情况下，在所述第一定时器超时后的下一个边链路资源池内时隙，第一终端设备针对所述边链路进程启动第二定时器并进入激活(active)或开启(on)状态。
例如，所述第二定时器为drx-RetransmissionTimerSL，在drx-RetransmissionTimerSL运行期间第一终端设备处于激活(active)或开启(on)状态。本申请不限于此，例如 第二定时器还可以是其他名称。
例如，第二定时器在第一定时器超时之后的边链路资源池内的第一个时隙的第一个符号被启动，第二定时器的运行时间长度为一个时隙。
图3是本申请实施例的边链路非连续接收的一示例图，示出了SCI指示有该SCI所在时隙后用于重传的预留资源(例如这表示相邻资源均在32个时隙之内)，并且去使能HARQ-ACK(HARQ disabled)的情况。
如图3所示，发送设备(Tx UE)通过发送资源1(如图3中的1 st Tx所示)向接收设备(Rx UE)发送SCI 1(第一SCI)；该SCI 1中指示有与其对应PSSCH的资源(即如图3中的1 st Tx所示)，此外还指示有该SCI 1所在时隙后用于重传的预留资源1(如图3中的2 nd Tx所示)和预留资源2(如图3中的3 rd Tx所示)。
如图3所示，接收设备接收到该SCI 1后，可以在该SCI 1所在时隙之后的第一个时隙的第一个符号开始启动drx-HARQ-RTT-TimerSL定时器。如图3所示，该drx-HARQ-RTT-TimerSL定时器到在SCI 1指示的用于下一次发送的预留资源(即预留资源1)所在时隙的前一个时隙结束后超时。
如图3所示，在该drx-HARQ-RTT-TimerSL定时器超时或停止后的第一个符号，drx-RetransmissionTimerSL定时器被启动，接收设备进入激活(active)或开启(on)状态，对通过预留资源1发送的重传进行接收。drx-RetransmissionTimerSL定时器可以为一个时隙。
如图3所示，在收到并正确解码预留资源1对应的SCI 2之后，drx-HARQ-RTT-TimerSL定时器被启动。该drx-HARQ-RTT-TimerSL定时器到在SCI 1或SCI 2指示的用于下一次发送的预留资源(即预留资源2)所在时隙的前一个时隙结束后超时。
如图3所示，在该drx-HARQ-RTT-TimerSL定时器超时或停止后的第一个符号，drx-RetransmissionTimerSL定时器被启动，接收设备进入激活(active)或开启(on)状态，对通过预留资源2发送的重传进行接收。drx-RetransmissionTimerSL定时器的值可以为1，即该定时器可以运行一个时隙。
以上示例性对本申请实施例的第一定时器和第二定时器，以及接收设备的非激活(inactive)或关闭(off)状态、激活(active)或开启(on)状态进行了示例性说明，但本申请不限于此。
在一些实施例中，第一终端设备在所述激活或开启状态下接收第二边链路控制信息； 在接收到所述第二边链路控制信息且所述第二边链路控制信息指示的目的标识(destination ID)和源标识(source ID)以及混合自动重传请求(HARQ)进程标识与所述第一边链路控制信息指示的目的标识(destination ID)和源标识(source ID)以及混合自动重传请求(HARQ)进程标识相同的情况下，停止所述第二定时器。
例如，如图3所示，在drx-HARQ-RTT-TimerSL定时器超时或停止后的第一个符号，drx-RetransmissionTimerSL定时器被启动，接收设备进入激活(active)或开启(on)状态，对通过预留资源1(如图3中的2 nd Tx所示)发送的重传进行接收。
假如在该预留资源1(如图3中的2 nd Tx所示)，接收设备接收到某一SCI(第二SCI)，该第二SCI指示的目的标识(destination ID)和源标识(source ID)以及HARQ进程标识与前述的第一SCI指示的目的标识(destination ID)和源标识(source ID)以及HARQ进程标识相同，可以认为该第二SCI指示了该HARQ process的重传，则接收设备可以接收到该重传并且停止该drx-RetransmissionTimerSL。
在一些实施例中，在第一边链路控制信息指示混合自动重传请求(HARQ)被使能，并且第一终端设备反馈了确认(ACK)的情况下，第一终端设备从所述第一定时器超时后的第一个边链路资源池内时隙的第一个符号可以保持所述非激活或关闭状态。例如，所述第二定时器在所述第一定时器超时之后的边链路资源池内第一个符号不被启动。
图4是本申请实施例的边链路非连续接收的另一示例图，示出了SCI指示有该SCI所在时隙后用于重传的预留资源(例如这表示相邻资源均在32个时隙之内)，并且使能HARQ-ACK(HARQ enabled)的情况。
如图4所示，发送设备(Tx UE)通过发送资源1(如图4中的1 st Tx所示)向接收设备(Rx UE)发送SCI 1(第一SCI)；该SCI 1中指示有与其对应PSSCH的资源(即如图4中的1 st Tx所示)，此外还指示有SCI 1所在时隙后用于重传的预留资源1(如图4中的2 nd Tx所示)和预留资源2(如图4中的3 rd Tx所示)。
如图4所示，接收设备接收到该SCI 1后，可以在该SCI 1所在时隙之后的第一个时隙的第一个符号开始启动drx-HARQ-RTT-TimerSL定时器。如图4所示，该drx-HARQ-RTT-TimerSL定时器到在SCI 1指示的用于下一次发送的预留资源(即预留资源1)所在时隙的前一个时隙结束后超时。
如图4所示，在该drx-HARQ-RTT-TimerSL定时器超时或停止后的第一个符号，drx-RetransmissionTimerSL定时器被启动，接收设备进入激活(active)或开启(on)状态，对通过预留资源1发送的重传进行接收。drx-RetransmissionTimerSL定时器的值可以 为1。
如图4所示，在收到并正确解码预留资源1对应的SCI 2之后，drx-HARQ-RTT-TimerSL定时器被启动。如图4所示，假如HARQ-ACK enable且接收设备反馈了ACK，则预留资源2(如图4中的3 rd Tx所示)被第二终端取消(cancel)或释放(release)，在该预留资源2所在时隙接收设备不再启动drx-Retransmission TimerSL。
以上示例性对本申请实施例的第一定时器和第二定时器，以及接收设备的非激活(inactive)或关闭(off)状态、激活(active)或开启(on)状态进行了示例性说明，但本申请不限于此。
在一些实施例中，由第二终端设备选择的用于初传的资源所在时隙位于第三定时器的运行期间，所述第三定时器周期性运行且被所述第一终端设备用于非连续接收(DRX)。
例如，所述第三定时器可以定义为OnDurationTimer，在所述OnDurationTimer运行期间，所述第一终端设备处于激活(active)或开启(on)状态。本申请不限于此，例如第三定时器还可以是其他名称或定义。
例如，如图3和图4所示，发送设备(Tx UE)用于发送初传的发送资源1(如图3或图4中的1 st Tx所示)位于第三定时器OnDurationTimer的运行期间。发送设备可以获得接收设备的DRX配置，由此可以保证至少所选择资源的首个资源所在时隙位于接收设备的OnDurationTimer运行期间内。
以上各个实施例仅对本申请实施例进行了示例性说明，但本申请不限于此，还可以在以上各个实施例的基础上进行适当的变型。例如，可以单独使用上述各个实施例，也可以将以上各个实施例中的一种或多种结合起来。
由上述实施例可知，接收设备接收发送设备发送的边链路控制信息，根据边链路控制信息中指示的预留资源进行非连续接收；由此能够实现边链路DRX机制，使得接收设备能够接收到发送设备的重传数据，并且能够节省功耗。
第二方面的实施例
本申请实施例提供一种边链路非连续接收方法，从第一终端设备进行说明，与第一方面的实施例相同的内容不再赘述。第二方面的实施例可以与第一方面的实施例结合起来，也可以单独地实施。
图5是本申请实施例的边链路非连续接收方法的一示意图，如图5所示，该方法包括：
501，第一终端设备接收第二终端设备发送的第一边链路控制信息，所述第一边链路控制信息中没有指示所述第一边链路控制信息所在时隙后用于重传的预留资源；以及
502，所述第一终端设备在接收到所述第一边链路控制信息并经过资源池内预定时隙数目之后，在边链路上处于激活或开启状态。
值得注意的是，以上附图5仅对本申请实施例进行了示意性说明，但本申请不限于此。例如可以适当地调整各个操作之间的执行顺序，此外还可以增加其他的一些操作或者减少其中的某些操作。本领域的技术人员可以根据上述内容进行适当地变型，而不仅限于上述附图5的记载。
在一些实施例中，第一边链路控制信息中没有指示用于重传的预留资源。例如，当前发送可能为最后一次重传，或者相邻两个资源不在32个slot之内。对于相邻两个资源不在32个slot之内的情况，接收设备需要能够接收到重传。
由此，第一终端设备在接收到第一边链路控制信息并经过预定时间之后处于激活或开启状态。例如，在所述第一边链路控制信息所在时隙后的第32个时隙的首个符号位置，第一终端设备启动drx-RetransmissionTimerSL。
在一些实施例中，从接收到所述第一边链路控制信息的时隙之后的边链路资源池内第一个时隙的第一个符号，到在所述第一边链路控制信息所在时隙之后的边链路资源池内预定时隙数目的最后一个符号，所述第一终端设备在边链路上可以处于非激活或关闭状态。
在一些实施例中，第一终端设备为所述第一边链路控制信息和/或对应的物理边链路共享信道(PSSCH)的意向(intended)接收终端。
例如，所述第一边链路控制信息中指示的目的标识与所述第一终端设备的标识相同，或者，所述目的标识包括所述第一终端设备的标识，或者，所述第一边链路控制信息指示所述第一终端设备感兴趣的业务。
在一些实施例中，第一终端设备针对边链路进程，从所述第一终端设备接收到所述第一边链路控制信息所在时隙之后的第一个边链路资源池内时隙的第一个符号启动第一定时器。
例如，第一定时器可以定义为drx-HARQ-RTT-TimerSL，在所述drx-HARQ-RTT-TimerSL运行期间，所述第一终端设备可以处于非激活(inactive)或关闭(off)状态。本申请不限于此，例如第一定时器还可以是其他名称或定义。
在一些实施例中，所述第一定时器的值为时隙个数；该个数为边链路资源池内预定 时隙数目；每经过一个边链路资源池内时隙，所述第一定时器的值减1；当第一定时器的值到达0后，该第一定时器超时。例如，所述预定时隙数目为31。
在一些实施例中，在所述第一定时器超时后的下一个边链路资源池内的时隙，所述第一终端设备针对所述边链路进程启动第二定时器并进入所述激活或开启状态。
例如，所述第二定时器可以定义为drx-Retransmission TimerSL，在drx-Retransmission TimerSL运行期间，所述第一终端设备处于激活(active)或开启(on)状态。本申请不限于此，例如第二定时器还可以是其他名称或定义。
在一些实施例中，所述第二定时器在所述第一定时器超时之后的第一个资源池内时隙的第一个符号被启动，所述第二定时器的值为多个连续的边链路资源池内时隙的个数。每经过一个边链路资源池内时隙，所述第二定时器的值减1；当第二定时器的值到达0后，该第二定时器超时。
图6是本申请实施例的边链路非连续接收的另一示例图，示出了SCI 0指示有该SCI0所在时隙后用于重传的预留资源(例如这表示相邻资源在32个时隙之内)以及SCI 1没有指示该SCI 1所在时隙后用于重传的预留资源(例如这表示相邻资源不在32个时隙之内)，并且去使能HARQ-ACK(HARQ disabled)的情况。
如图6所示，发送设备(Tx UE)通过发送资源1(如图6中的1 st Tx所示)向接收设备(Rx UE)发送SCI 0；该SCI 0中指示有对应PSSCH的资源(即如图6中的1 st Tx所示)，此外还指示有该SCI 0所在时隙后用于重传的预留资源1(如图6中的2 nd Tx所示)。
如图6所示，接收设备接收到该SCI 0后，可以在该SCI 0所在时隙之后的第一个时隙的第一个符号开始启动drx-HARQ-RTT-TimerSL定时器。如图6所示，该drx-HARQ-RTT-TimerSL定时器到在SCI 0指示的用于下一次发送的预留资源(即预留资源1)所在时隙的前一个时隙结束后超时。
如图6所示，在该drx-HARQ-RTT-TimerSL定时器超时或停止后的第一个符号，drx-RetransmissionTimerSL定时器被启动，接收设备进入激活(active)或开启(on)状态，对通过预留资源1发送的重传进行接收。drx-RetransmissionTimerSL定时器的值可以为1。
如图6所示，发送设备(Tx UE)通过预留资源1(如图6中的2 nd Tx所示)向接收设备(Rx UE)发送SCI 1(第一SCI)；该SCI 1中没有指示该SCI 1所在时隙后的预留资源。如图6所示，在该预留资源1之后的32个时隙内没有预留资源；用于重传的 预留资源2(如图6中的3 rd Tx所示)与预留资源1之间的时间间隔大于32个时隙。
如图6所示，对应于预留资源1(如图6中的2 nd Tx所示)，在收到并正确解码预留资源1对应的SCI 1之后，drx-HARQ-RTT-TimerSL定时器被启动。该drx-HARQ-RTT-TimerSL定时器从第一终端设备接收到该第一SCI所在时隙(如图6中的2 nd Tx所示)之后的边链路资源池内第一个时隙的第一个符号，到在该第一SCI所在时隙之后的边链路资源池内第31个时隙的最后一个符号。
如图6所示，在该drx-HARQ-RTT-TimerSL定时器超时或停止后的第一个符号，drx-RetransmissionTimerSL定时器被启动，接收设备进入激活(active)或开启(on)状态，对通过预留资源2发送的重传进行接收。如图6所示，drx-RetransmissionTimerSL定时器可以运行在边链路资源池内的多个连续时隙上。
以上示例性对本申请实施例的第一定时器和第二定时器，以及接收设备的非激活(inactive)或关闭(off)状态、激活(active)或开启(on)状态进行了示例性说明，但本申请不限于此。
在一些实施例中，第一终端设备还可以根据第一边链路控制信息对应的物理边链路共享信道(PSSCH)中的边链路控制信息(2 nd stage SCI)指示是否还有重传或者重传次数，确定是否启动所述第二定时器。
例如，在图6中对应于预留资源1(如图6中的2 nd Tx所示)接收到第一SCI，并且该第一SCI对应的PSSCH中携带有2 nd stage SCI。如果该2 nd stage SCI指示该HARQ process后续还有重传，则可以如图6所示，在31个时隙后启动drx-RetransmissionTimerSL定时器；如果该2 nd stage SCI指示该HARQ process后续没有重传或者后续的重传次数为0，则接收设备可以不再启动drx-RetransmissionTimerSL定时器。
在一些实施例中，第一终端设备根据所述第一边链路控制信息指示的优先级和/或信道忙碌率(CBR，Channel Busy Rate)，确定是否启动所述第二定时器。
例如，在图6中对应于预留资源1(如图6中的2 nd Tx所示)接收到第一SCI。如果该第一SCI指示优先级高(例如高于某一门限)，则可以如图6所示，在31个时隙后启动drx-RetransmissionTimerSL定时器；如果该第一SCI指示优先级低(例如低于某一门限)，则接收设备可以不再启动drx-RetransmissionTimerSL定时器。
在一些实施例中，所述第二定时器的值根据所述第一边链路控制信息指示的优先级被确定。例如，针对不同的优先级，所述第二定时器对应的候选值不同。
例如，可以在资源池配置的IE中配置对应的drx-RetransmissionTimerSL值。对应于 不同优先级或不同优先级范围，可以配置不同的drx-RetransmissionTimerSL的取值。可选的，优先级越高，drx-RetransmissionTimerSL的取值越大。
在一些实施例中，第一终端设备在所述激活或开启状态下接收第二边链路控制信息；在接收到所述第二边链路控制信息且所述第二边链路控制信息指示的目的标识和源标识以及混合自动重传请求(HARQ)进程标识与所述第一边链路控制信息指示的目的标识和源标识以及混合自动重传请求(HARQ)进程标识相同的情况下，停止所述第二定时器。
在一些实施例中，在第一边链路控制信息指示混合自动重传请求(HARQ)被使能，并且所述第一终端设备反馈了确认(ACK)的情况下，第一终端设备从所述第一定时器超时后的第一个边链路资源池内时隙的第一个符号，可以在边链路上保持所述非激活或关闭状态。例如，所述第二定时器在所述第一定时器超时之后的第一个边链路资源池内时隙的第一个符号不被启动。
图7是本申请实施例的边链路非连续接收的另一示例图，示出了SCI 0指示有该SCI 0所在时隙后用于重传的预留资源(例如这表示相邻资源在32个时隙之内)以及SCI 1没有指示该SCI 1所在时隙后用于重传的预留资源(例如这表示相邻资源不在32个时隙之内)，并且使能HARQ-ACK(HARQ enabled)的情况。
如图7所示，发送设备(Tx UE)通过发送资源1(如图7中的1 st Tx所示)向接收设备(Rx UE)发送SCI 0；该SCI 0中指示有对应PSSCH的资源(即如图7中的1 st Tx所示)，此外还指示有该SCI 0所在时隙后用于重传的预留资源1(如图7中的2 nd Tx所示)。
如图7所示，接收设备接收到该SCI 0后，可以在该SCI 0所在时隙之后的第一个时隙的第一个符号开始启动drx-HARQ-RTT-TimerSL定时器。如图7所示，该drx-HARQ-RTT-TimerSL定时器到在SCI 0指示的用于下一次发送的预留资源(即预留资源1)所在时隙的前一个时隙结束后超时。
如图7所示，在该drx-HARQ-RTT-TimerSL定时器超时或停止后的第一个符号，drx-RetransmissionTimerSL定时器被启动，接收设备进入激活(active)或开启(on)状态，对通过预留资源1发送的重传进行接收。drx-RetransmissionTimerSL定时器的值可以为1。
如图7所示，发送设备(Tx UE)通过预留资源1(如图7中的2 nd Tx所示)向接收设备(Rx UE)发送SCI 1(第一SCI)；该SCI 1中没有指示该SCI 1所在时隙后的预 留资源。如图7所示，在该预留资源1之后的32个时隙内没有预留资源；用于重传的预留资源2(如图7中的3 rd Tx所示)与预留资源1之间的时间间隔大于32个时隙。
如图7所示，对应于预留资源1(如图7中的2 nd Tx所示)，在收到并正确解码该预留资源1对应的SCI 1之后，drx-HARQ-RTT-TimerSL定时器被启动。该drx-HARQ-RTT-TimerSL定时器从第一终端设备接收到该第一SCI所在时隙(如图6中的2 nd Tx所示)之后的边链路资源池内第一个时隙的第一个符号，到在该第一SCI所在时隙之后的边链路资源池内第31个时隙的最后一个符号。
如图7所示，假如HARQ-ACK enable且接收设备反馈了ACK，则预留资源2(如图7中的3 rd Tx所示)可能被取消(cancel)，因此接收设备可以不再启动drx-Retransmission TimerSL。
以上示例性对本申请实施例的第一定时器和第二定时器，以及接收设备的非激活(inactive)或关闭(off)状态、激活(active)或开启(on)状态进行了示例性说明，但本申请不限于此。
在一些实施例中，由第二终端设备选择的用于初传的资源所在时隙位于第三定时器的运行期间，所述第三定时器周期性运行且被所述第一终端设备用于非连续接收(DRX)。
例如，所述第三定时器可以定义为OnDurationTimer，在所述OnDurationTimer运行期间，所述第一终端设备处于激活(active)或开启(on)状态。本申请不限于此，例如第三定时器还可以是其他名称或定义。
例如，如图6和图7所示，发送设备(Tx UE)用于发送初传的发送资源1(如图6或图7中的1 st Tx所示)位于第三定时器OnDurationTimer的运行期间。发送设备可以获得接收设备的DRX配置，由此可以保证至少所选择资源的首个资源所在时隙位于接收设备的OnDurationTimer运行期间内。
以上各个实施例仅对本申请实施例进行了示例性说明，但本申请不限于此，还可以在以上各个实施例的基础上进行适当的变型。例如，可以单独使用上述各个实施例，也可以将以上各个实施例中的一种或多种结合起来。
由上述实施例可知，接收设备接收发送设备发送的边链路控制信息，根据边链路控制信息中是否指示预留资源进行非连续接收；由此能够实现边链路DRX机制，使得接收设备能够接收到发送设备的重传数据，并且能够节省功耗。
第三方面的实施例
本申请实施例提供一种边链路非连续接收方法，从第一终端设备进行说明，与第一、二方面的实施例相同的内容不再赘述。第三方面的实施例可以与第一、二方面的实施例结合起来，也可以单独地实施。
图8是本申请实施例的边链路非连续接收方法的一示意图，如图8所示，该方法包括：
801，第一终端设备接收第二终端设备发送的第三边链路控制信息，所述第三边链路控制信息中指示有所述第三边链路控制信息所在时隙后用于重传的第一预留资源；以及
802，在所述第一预留资源上没有接收到对应的物理边链路控制信道(PSCCH)的情况下，所述第一终端设备从所述第一预留资源所在的时隙之后的边链路资源池内第一个时隙的第一个符号开始，在边链路资源池内的多个连续时隙处于激活或开启状态。
值得注意的是，以上附图8仅对本申请实施例进行了示意性说明，但本申请不限于此。例如可以适当地调整各个操作之间的执行顺序，此外还可以增加其他的一些操作或者减少其中的某些操作。本领域的技术人员可以根据上述内容进行适当地变型，而不仅限于上述附图8的记载。
在一些实施例中，第一终端设备在第一预留资源上没有接收到对应的PSCCH/PSSCH。例如，第二终端设备由于重评估(re-evaluation)/抢占(pre-emption)/冲突控制(congestion control)/优先级等因素，没有在这个资源上进行发送且触发了资源重选，此时重选的资源可能不能保证相邻两个资源在32slot之内，这种情况下第一终端设备也需要收到对应的重传。
在一些实施例中，第一终端设备为所述第三边链路控制信息和/或对应的物理边链路共享信道(PSSCH)的意向(intended)接收终端。
例如，所述第三边链路控制信息中指示的目的标识与所述第一终端设备的标识相同，或者，所述目的标识包括所述第一终端设备的标识，或者，所述第三边链路控制信息指示所述第一终端设备感兴趣的业务。
在一些实施例中，所述第一终端设备还针对所述边链路进程，在当前时隙之后的边链路资源池内第一个符号启动第二定时器。
例如，第二定时器可以定义为drx-Retransmission TimerSL，在drx-Retransmission TimerSL运行期间，第一终端设备处于激活(active)或开启(on)状态。本申请不限于此，例如第二定时器还可以是其他名称或定义。
在一些实施例中，在第一终端设备获知所述第一预留资源后还有用于所述重传的第二预留资源的情况下，第二定时器的值为从所述第一终端设备接收到的所述第一边链路控制信息所在时隙之后的第一个边链路资源池内时隙，到在边链路资源池内所述第二预留资源所在时隙的期间内包含的资源池内时隙总数。每经过一个边链路资源池内时隙，所述第二定时器的值减1；当第二定时器的值到达0后，该第二定时器超时。
例如，以图3和图4为例，发送设备(Tx UE)通过发送资源1(如图3或4中的1 st Tx所示)向接收设备(Rx UE)发送SCI(第一SCI)；该SCI中指示有对应PSSCH的资源(即如图3或4中的1 st Tx所示)，此外还指示有用于重传的预留资源1(如图3或4中的2 nd Tx所示)和预留资源2(如图3或4中的3 rd Tx所示)。
假如在该预留资源1(如图3或4中的2 nd Tx所示)，接收设备没有接收到PSCCH/PSSCH，则接收设备可以从该预留资源1所在时隙之后的边链路资源池内第一个时隙的第一个符号启动drx-RetransmissionTimerSL，进入激活(active)或开启(on)状态。该drx-RetransmissionTimerSL在边链路资源池内预留资源2(如图3或4中的3 rd Tx所示)所在时隙之前的最后一个时隙结束后超时。
在一些实施例中，在第一终端设备获知所述第一预留资源后没有用于所述重传的第二预留资源、或者所述第一终端设备不知道后续资源的情况下，所述第二定时器的值为边链路资源池内预定时隙数目。每经过一个边链路资源池内时隙，所述第二定时器的值减1；当第二定时器的值到达0后，该第二定时器超时。所述预定时隙数目例如为31。
例如，以图6和图7为例，发送设备(Tx UE)通过发送资源1(如图6或7中的1 st Tx所示)向接收设备(Rx UE)发送SCI(第一SCI)；该SCI中指示有对应PSSCH的资源(即如图6或7中的1 st Tx所示)，此外还指示有用于重传的预留资源1(如图6或7中的2 nd Tx所示)。
假如在该预留资源1(如图6或7中的2 nd Tx所示)，接收设备没有接收到PSCCH/PSSCH，则接收设备可以从该预留资源1所在时隙之后的边链路资源池内第一个时隙的第一个符号启动drx-RetransmissionTimerSL，进入激活(active)或开启(on)状态。该drx-RetransmissionTimerSL在边链路资源池内第31个时隙的最后一个时隙结束后超时。
在一些实施例中，第二定时器的值根据所述第三边链路控制信息指示的优先级被确定。例如，针对不同的优先级，所述第二定时器对应的候选值不同。
例如，可以在资源池配置的IE中配置对应的drx-RetransmissionTimerSL值。对应于不同优先级或不同优先级范围，可以配置不同的drx-RetransmissionTimerSL的取值长度。 可选的，优先级越高，drx-RetransmissionTimerSL的取值越大。
在一些实施例中，第一终端设备在所述激活或开启状态下接收第四边链路控制信息；在接收到所述第四边链路控制信息且所述第四边链路控制信息指示的目的标识和源标识以及混合自动重传请求(HARQ)进程标识与所述第三边链路控制信息指示的目的标识和源标识以及混合自动重传请求(HARQ)进程标识相同的情况下，停止所述第二定时器。
在一些实施例中，由所述第二终端设备对所述第一预留资源进行重选的重选资源位于所述第一预留资源之后。
图9是本申请实施例的边链路非连续接收的另一示例图，示出了SCI指示有该SCI所在时隙后用于重传的预留资源(例如这表示相邻资源在32个时隙之内)以及该预留资源由于碰撞而产生重选，并且去使能HARQ-ACK(HARQ disabled)的情况。
如图9所示，发送设备(Tx UE)通过发送资源1(如图9中的1 st Tx所示)向接收设备(Rx UE)发送SCI；该SCI中指示有对应PSSCH的资源(即如图9中的1 st Tx所示)，此外还指示有该SCI所在时隙后用于重传的预留资源1(如图9中的2 nd Tx所示)。
如图9所示，接收设备接收到该SCI后，可以在该SCI所在时隙之后的第一个时隙的第一个符号开始启动drx-HARQ-RTT-TimerSL定时器。如图9所示，该drx-HARQ-RTT-TimerSL定时器到在SCI指示的用于下一次发送的预留资源(即预留资源1)所在时隙的前一个时隙结束后超时。
如图9所示，在该drx-HARQ-RTT-TimerSL定时器超时或停止后的第一个符号，drx-RetransmissionTimerSL定时器被启动，接收设备进入激活(active)或开启(on)状态，对通过预留资源1发送的重传进行接收。
如图9所示，接收设备在预留资源1(如图7中的2 nd Tx所示)没有接收到PSCCH/PSSCH；则drx-RetransmissionTimerSL定时器继续运行。如图9所示，发送设备可以针对预留资源1进行重选，该重选资源(如图9中重选的2 nd Tx所示)位于该预留资源1(如图9中2 nd Tx所示)之后。
以上示例性对本申请实施例的第一定时器和第二定时器，以及接收设备的非激活(inactive)或关闭(off)状态、激活(active)或开启(on)状态进行了示例性说明，但本申请不限于此。
在一些实施例中，由所述第二终端设备选择的用于初传的资源所在时隙位于第三定时器的运行期间，所述第三定时器周期性运行且被所述第一终端设备用于非连续接收 (DRX)。
例如，所述第三定时器可以定义为OnDurationTimer，在所述OnDurationTimer运行期间，所述第一终端设备处于激活(active)或开启(on)状态。本申请不限于此，例如第三定时器还可以是其他名称或定义。
例如，如图9所示，发送设备(Tx UE)用于发送初传的发送资源1(如图9中的1 st Tx所示)位于第三定时器OnDurationTimer的运行期间。发送设备可以获得接收设备的DRX配置，由此可以保证至少所选择资源的首个资源所在时隙位于接收设备的OnDurationTimer运行期间内。
以上各个实施例仅对本申请实施例进行了示例性说明，但本申请不限于此，还可以在以上各个实施例的基础上进行适当的变型。例如，可以单独使用上述各个实施例，也可以将以上各个实施例中的一种或多种结合起来。
由上述实施例可知，接收设备接收发送设备发送的边链路控制信息，根据边链路控制信息中指示的预留资源进行非连续接收；由此能够实现边链路DRX机制，使得接收设备能够接收到发送设备的重传数据，并且能够节省功耗。
第四方面的实施例
本申请实施例提供一种边链路非连续接收装置。该装置例如可以是终端设备(例如前述的第一终端设备)，也可以是配置于终端设备的某个或某些部件或者组件，与第一至三方面的实施例相同的内容不再赘述。
图10是本申请实施例的边链路非连续接收装置的一示意图。如图10所示，边链路非连续接收装置1000包括：接收单元1001和处理单元1002。
在一些实施例中，接收单元1001接收第二终端设备发送的第一边链路控制信息，所述第一边链路控制信息中指示有所述第一边链路控制信息所在时隙后用于重传的预留资源；以及处理单元1002在所述预留资源所在时隙，使所述第一终端设备在边链路上处于激活或开启状态。
在一些实施例中，从所述预留资源所在时隙的第一个符号开始，所述第一终端设备在边链路上被激活或开启，并持续边链路资源池内的一个时隙或多个连续时隙。
在一些实施例中，从接收到所述第一边链路控制信息的时隙之后的边链路资源池内第一个符号，到在所述第一边链路控制信息中指示的用于下一次发送的预留资源所在时隙的前一个边链路资源池内时隙的最后一个符号，所述第一终端设备在边链路上可以处 于非激活或关闭状态。
在一些实施例中，所述第一终端设备为所述第一边链路控制信息和/或对应的物理边链路共享信道的意向接收终端；其中，所述第一边链路控制信息中指示的目的标识与所述第一终端设备的标识相同，或者，所述目的标识包括所述第一终端设备的标识，或者，所述第一边链路控制信息指示所述第一终端设备感兴趣的业务。
在一些实施例中，所述处理单元1002针对边链路进程，从所述第一终端设备接收到所述第一边链路控制信息的时隙之后的第一个边链路资源池内时隙的第一个符号启动第一定时器；
例如，所述第一定时器为drx-HARQ-RTT-TimerSL，在所述drx-HARQ-RTT-TimerSL运行期间，所述第一终端设备在边链路上可以处于非激活或关闭状态。
在一些实施例中，所述第一定时器的值为时隙个数，所述个数为从所述第一终端设备接收到所述第一边链路控制信息的时隙之后的第一个边链路资源池内时隙，到在所述第一边链路控制信息中指示的用于下一次发送的预留资源所在时隙的前一个边链路资源池内时隙的期间所包含的资源池内时隙总数。每经过一个边链路资源池内时隙，所述第一定时器的值减1；当第一定时器的值到达0后，该第一定时器超时。
在一些实施例中，在所述第一边链路控制信息指示混合自动重传请求被去使能，或者在所述第一边链路控制信息指示混合自动重传请求被使能且所述第一终端设备反馈了非确认(NACK)的情况下，在所述第一定时器超时后的下一个边链路资源池内时隙，所述处理单元针对所述边链路进程启动第二定时器并且所述第一终端设备进入所述激活或开启状态；
例如，所述第二定时器为drx-Retransmission TimerSL，在drx-RetransmissionTimerSL运行期间，所述第一终端设备在边链路上处于激活或开启状态。
在一些实施例中，所述第二定时器在所述第一定时器超时之后的边链路资源池内第一个时隙的第一个符号被启动。
在一些实施例中，接收单元1001还在所述激活或开启状态下接收第二边链路控制信息；在接收到所述第二边链路控制信息且所述第二边链路控制信息指示的目的标识和源标识以及混合自动重传请求(HARQ)进程标识与所述第一边链路控制信息指示的目的标识和源标识以及混合自动重传请求(HARQ)进程标识相同的情况下，处理单元1002停止所述第二定时器。
在一些实施例中，在所述第一边链路控制信息指示混合自动重传请求被使能，并且 所述第一终端设备反馈了确认的情况下，所述第一终端设备从所述第一定时器超时后的第一个边链路资源池内时隙的第一个符号，可以在边链路上处于或保持所述非激活或关闭状态。
在一些实施例中，由所述第二终端设备选择的用于初传的资源所在时隙位于第三定时器的运行期间，所述第三定时器周期性运行且被所述第一终端设备用于非连续接收；
例如，所述第三定时器为OnDurationTimer，在所述OnDurationTimer运行期间，所述第一终端设备在边链路上处于激活或开启状态。
在一些实施例中，接收单元1001接收第二终端设备发送的第一边链路控制信息，所述第一边链路控制信息中没有指示所述第一边链路控制信息所在时隙后用于重传的预留资源；以及处理单元1002在接收到所述第一边链路控制信息并经过资源池内预定时隙数目之后，使所述第一终端设备在边链路上处于激活或开启状态。
在一些实施例中，从接收到所述第一边链路控制信息的时隙之后的边链路资源池内第一个时隙的第一个符号，到所述第一边链路控制信息所在时隙之后的边链路资源池内预定时隙数目的最后一个符号，所述第一终端设备在边链路上可以处于非激活或关闭状态。
在一些实施例中，所述处理单元1002针对所述边链路进程，从所述第一终端设备接收到所述第一边链路控制信息的时隙之后的第一个边链路资源池内时隙的第一个符号启动第一定时器；
例如，所述第一定时器为drx-HARQ-RTT-TimerSL，在所述drx-HARQ-RTT-TimerSL运行期间，所述第一终端设备在边链路上可以处于非激活或关闭状态。
在一些实施例中，所述第一定时器的值为时隙个数，所述个数为边链路资源池内预定时隙数目。每经过一个边链路资源池内时隙，所述第一定时器的值减1；当第一定时器的值到达0后，该第一定时器超时。
在一些实施例中，在所述第一边链路控制信息指示混合自动重传请求被去使能，或者在所述第一边链路控制信息指示混合自动重传请求被使能且所述第一终端设备反馈了非确认的情况下，在所述第一定时器超时后的下一个边链路资源池内时隙的第一个符号，所述处理单元1002针对所述边链路进程启动第二定时器并使第一终端设备进入所述激活或开启状态。
在一些实施例中，所述第二定时器在所述第一定时器超时之后的第一个资源池内时隙的第一个符号被启动，所述第二定时器的值为连续的多个边链路资源池内时隙的个数。 每经过一个边链路资源池内时隙，所述第二定时器的值减1；当第二定时器的值到达0后，该第二定时器超时。
在一些实施例中，在所述第一边链路控制信息指示混合自动重传请求被使能，且所述第一终端设备反馈了确认的情况下，在所述第一定时器超时后的下一个边链路资源池内时隙的第一个符号，所述处理单元1002针对所述边链路进程不启动第二定时器。
在一些实施例中，所述处理单元1002根据所述第一边链路控制信息对应的物理边链路共享信道中的边链路控制信息指示是否还有重传或者重传次数，确定是否启动所述第二定时器。
在一些实施例中，所述处理单元1002根据所述第一边链路控制信息指示的优先级和/或信道忙碌率，确定是否启动所述第二定时器。
在一些实施例中，所述第二定时器的值根据所述第一边链路控制信息指示的优先级被确定；针对不同的优先级，所述第二定时器对应的候选值不同。
在一些实施例中，接收单元1001接收第二终端设备发送的第三边链路控制信息，所述第三边链路控制信息中指示有所述第三边链路控制信息所在时隙后用于重传的第一预留资源；以及处理单元1002在所述第一预留资源上没有接收到对应的物理边链路控制信道的情况下，从所述第一预留资源所在的时隙之后的边链路资源池内第一个时隙的第一个符号开始，使所述第一终端设备在边链路资源池内的多个连续时隙处于激活或开启状态。
在一些实施例中，所述处理单元1002还针对所述边链路进程，在当前时隙之后的边链路资源池内第一个符号启动第二定时器。
在一些实施例中，在所述第一终端设备获知所述第一预留资源后还有用于所述重传的第二预留资源的情况下，所述第二定时器的个数为从所述第一终端设备接收到所述第一边链路控制信息的时隙之后的第一个边链路资源池内时隙，到边链路资源池内所述第二预留资源所在时隙的期间内所包含的资源池内时隙总数。每经过一个边链路资源池内时隙，所述第二定时器的值减1；当第二定时器的值到达0后，该第二定时器超时。
在一些实施例中，在所述第一终端设备获知所述第一预留资源后没有用于所述重传的第二预留资源、或者所述第一终端设备不知道后续资源的情况下，所述第二定时器的值为边链路资源池内预定时隙数目。每经过一个边链路资源池内时隙，所述第二定时器的值减1；当第二定时器的值到达0后，该第二定时器超时。
以上各个实施例仅对本申请实施例进行了示例性说明，但本申请不限于此，还可以 在以上各个实施例的基础上进行适当的变型。例如，可以单独使用上述各个实施例，也可以将以上各个实施例中的一种或多种结合起来。
值得注意的是，以上仅对与本申请相关的各部件或模块进行了说明，但本申请不限于此。边链路非连续接收装置1000还可以包括其他部件或者模块，关于这些部件或者模块的具体内容，可以参考相关技术。
此外，为了简单起见，图10中仅示例性示出了各个部件或模块之间的连接关系或信号走向，但是本领域技术人员应该清楚的是，可以采用总线连接等各种相关技术。上述各个部件或模块可以通过例如处理器、存储器、发射机、接收机等硬件设施来实现；本申请实施并不对此进行限制。
由上述实施例可知，接收设备接收发送设备发送的边链路控制信息，根据边链路控制信息中指示的预留资源进行非连续接收；由此能够实现边链路DRX机制，使得接收设备能够接收到发送设备的重传数据，并且能够节省功耗。
第五方面的实施例
本申请实施例还提供一种通信系统，可以参考图1，与第一方面至第四方面的实施例相同的内容不再赘述。
在一些实施例中，通信系统100至少可以包括：
第一终端设备102，其接收第一边链路控制信息，所述第一边链路控制信息中指示有所述第一边链路控制信息所在时隙后用于重传的预留资源；以及在所述预留资源所在时隙，在边链路上处于激活或开启状态；
第二终端设备103，其发送所述第一边链路控制信息。
在一些实施例中，通信系统100至少可以包括：
第一终端设备102，其接收第一边链路控制信息，所述第一边链路控制信息中没有指示所述第一边链路控制信息所在时隙后用于重传的预留资源；以及在接收到所述第一边链路控制信息并经过资源池内预定时隙数目之后，在边链路上处于激活或开启状态；
第二终端设备103，其发送所述第一边链路控制信息。
在一些实施例中，通信系统100至少可以包括：
第一终端设备102，其接收第三边链路控制信息，所述第三边链路控制信息中指示有所述第三边链路控制信息所在时隙后用于重传的第一预留资源；以及在所述第一预留资源上没有接收到对应的物理边链路控制信道的情况下，从所述第一预留资源所在的时 隙之后的边链路资源池内第一个时隙的第一个符号开始，在边链路资源池内的多个连续时隙处于激活或开启状态；
第二终端设备103，其发送所述第三边链路控制信息。
本申请实施例还提供一种网络设备，例如可以是基站，但本申请不限于此，还可以是其他的网络设备。
图11是本申请实施例的网络设备的构成示意图。如图11所示，网络设备1100可以包括：处理器1110(例如中央处理器CPU)和存储器1120；存储器1120耦合到处理器1110。其中该存储器1120可存储各种数据；此外还存储信息处理的程序1130，并且在处理器1110的控制下执行该程序1130。
此外，如图11所示，网络设备1100还可以包括：收发机1140和天线1150等；其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，网络设备1100也并不是必须要包括图11中所示的所有部件；此外，网络设备1100还可以包括图11中没有示出的部件，可以参考现有技术。
本申请实施例还提供一种终端设备，但本申请不限于此，还可以是其他的设备。
图12是本申请实施例的终端设备的示意图。如图12所示，该终端设备1200可以包括处理器1210和存储器1220；存储器1220存储有数据和程序，并耦合到处理器1210。值得注意的是，该图是示例性的；还可以使用其他类型的结构，来补充或代替该结构，以实现电信功能或其他功能。
例如，处理器1210可以被配置为执行程序而实现如第一方面的实施例所述的边链路非连续接收方法。例如处理器1210可以被配置为进行如下的控制：接收第一边链路控制信息，所述第一边链路控制信息中指示有所述第一边链路控制信息所在时隙后用于重传的预留资源；以及在所述预留资源所在时隙，使第一终端设备在边链路上处于激活或开启状态。
再例如，处理器1210可以被配置为执行程序而实现如第二方面的实施例所述的边链路非连续接收方法。例如处理器1210可以被配置为进行如下的控制：接收第一边链路控制信息，所述第一边链路控制信息中没有指示所述第一边链路控制信息所在时隙后用于重传的预留资源；以及在接收到所述第一边链路控制信息并经过资源池内预定时隙数目之后，使第一终端设备在边链路上处于激活或开启状态。
再例如，处理器1210可以被配置为执行程序而实现如第三方面的实施例所述的边链路非连续接收方法。例如处理器1210可以被配置为进行如下的控制：接收第三边链 路控制信息，所述第三边链路控制信息中指示有所述第三边链路控制信息所在时隙后用于重传的第一预留资源；以及在所述第一预留资源上没有接收到对应的物理边链路控制信道的情况下，从所述第一预留资源所在的时隙之后的边链路资源池内第一个时隙的第一个符号开始，在边链路资源池内的多个连续时隙使第一终端设备处于激活或开启状态。
如图12所示，该终端设备1200还可以包括：通信模块1230、输入单元1240、显示器1250、电源1260。其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，终端设备1200也并不是必须要包括图12中所示的所有部件，上述部件并不是必需的；此外，终端设备1200还可以包括图12中没有示出的部件，可以参考现有技术。
本申请实施例还提供一种计算机程序，其中当在终端设备中执行所述程序时，所述程序使得所述终端设备执行第一至三方面的实施例所述的边链路非连续接收方法。
本申请实施例还提供一种存储有计算机程序的存储介质，其中所述计算机程序使得终端设备执行第一至三方面的实施例所述的边链路非连续接收方法。
本申请以上的装置和方法可以由硬件实现，也可以由硬件结合软件实现。本申请涉及这样的计算机可读程序，当该程序被逻辑部件所执行时，能够使该逻辑部件实现上文所述的装置或构成部件，或使该逻辑部件实现上文所述的各种方法或步骤。本申请还涉及用于存储以上程序的存储介质，如硬盘、磁盘、光盘、DVD、flash存储器等。
结合本申请实施例描述的方法/装置可直接体现为硬件、由处理器执行的软件模块或二者组合。例如，图中所示的功能框图中的一个或多个和/或功能框图的一个或多个组合，既可以对应于计算机程序流程的各个软件模块，亦可以对应于各个硬件模块。这些软件模块，可以分别对应于图中所示的各个步骤。这些硬件模块例如可利用现场可编程门阵列(FPGA)将这些软件模块固化而实现。
软件模块可以位于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动磁盘、CD-ROM或者本领域已知的任何其它形式的存储介质。可以将一种存储介质耦接至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息；或者该存储介质可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。该软件模块可以存储在移动终端的存储器中，也可以存储在可插入移动终端的存储卡中。例如，若设备(如移动终端)采用的是较大容量的MEGA-SIM卡或者大容量的闪存装置，则该软件模块可存储在该MEGA-SIM卡或者大容量的闪存 装置中。
针对附图中描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，可以实现为用于执行本申请所描述功能的通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件或者其任意适当组合。针对附图描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，还可以实现为计算设备的组合，例如，DSP和微处理器的组合、多个微处理器、与DSP通信结合的一个或多个微处理器或者任何其它这种配置。
以上结合具体的实施方式对本申请进行了描述，但本领域技术人员应该清楚，这些描述都是示例性的，并不是对本申请保护范围的限制。本领域技术人员可以根据本申请的精神和原理对本申请做出各种变型和修改，这些变型和修改也在本申请的范围内。
关于包括以上实施例的实施方式，还公开下述的附记：
附记1.一种边链路非连续接收方法，包括：
第一终端设备接收第二终端设备发送的第一边链路控制信息，所述第一边链路控制信息中指示有所述第一边链路控制信息所在时隙后用于重传的预留资源；以及
所述第一终端设备在所述预留资源所在时隙，在边链路上处于激活(active)或开启(on)状态。
附记2.根据附记1所述的方法，其中，从所述预留资源所在时隙的第一个符号开始，所述第一终端设备在边链路上被激活或开启，并持续边链路资源池内的一个时隙或多个连续时隙。
附记3.根据附记1或2所述的方法，其中，所述方法还包括：
从接收到所述第一边链路控制信息的时隙之后的边链路资源池内第一个符号，到在所述第一边链路控制信息中指示的用于下一次发送的预留资源所在时隙的前一个边链路资源池内时隙的最后一个符号，所述第一终端设备在边链路上处于非激活(inactive)或关闭(off)状态。
附记4.根据附记1至3任一项所述的方法，其中，所述第一终端设备为所述第一边链路控制信息和/或对应的物理边链路共享信道(PSSCH)的意向(intended)接收终端。
附记5.根据附记4所述的方法，其中，所述第一边链路控制信息中指示的目的标识与所述第一终端设备的标识相同，或者，所述目的标识包括所述第一终端设备的标识， 或者，所述第一边链路控制信息指示所述第一终端设备感兴趣的业务。
附记6.根据附记3所述的方法，其中，所述第一终端设备针对边链路进程，从所述第一终端设备接收到所述第一边链路控制信息的时隙之后的第一个边链路资源池内时隙的第一个符号启动第一定时器。
附记7.根据附记6所述的方法，其中，所述第一定时器为drx-HARQ-RTT-TimerSL，在所述drx-HARQ-RTT-TimerSL运行期间，所述第一终端设备在边链路上处于非激活(inactive)或关闭(off)状态。
附记8.根据附记6所述的方法，其中，所述第一定时器的值为时隙个数，所述个数为从所述第一终端设备接收到所述第一边链路控制信息的时隙之后的第一个边链路资源池内时隙，到在所述第一边链路控制信息中指示的用于下一次发送的预留资源所在时隙的前一个边链路资源池内时隙的期间所包含的资源池内时隙总数；
每经过一个边链路资源池时隙，所述第一定时器的值减1。
附记9.根据附记6至8任一项所述的方法，其中，所述方法还包括：
在所述第一边链路控制信息指示混合自动重传请求被去使能，或者在所述第一边链路控制信息指示混合自动重传请求被使能且所述第一终端设备反馈了非确认(NACK)的情况下，在所述第一定时器超时后的第一个边链路资源池内时隙的第一个符号，所述第一终端设备针对所述边链路进程启动第二定时器并进入所述激活或开启状态。
附记10.根据附记9所述的方法，其中，所述第二定时器为drx-Retransmission TimerSL，在所述drx-RetransmissionTimerSL运行期间，所述第一终端设备在边链路上处于激活(active)或开启(on)状态。
附记11.根据附记9或10所述的方法，其中，每经过一个边链路资源池内时隙，所述第二定时器的值减1。
附记12.根据附记9至11任一项所述的方法，其中，所述第二定时器的值为1。
附记13.根据附记9至11任一项所述的方法，其中，所述方法还包括：
所述第一终端设备在所述激活或开启状态下接收第二边链路控制信息；
在接收到所述第二边链路控制信息且所述第二边链路控制信息指示的目的标识和源标识以及混合自动重传请求(HARQ)进程标识与所述第一边链路控制信息指示的目的标识和源标识以及混合自动重传请求(HARQ)进程标识相同的情况下，停止所述第二定时器。
附记14.根据附记6至8任一项所述的方法，其中，所述方法还包括：
在所述第一边链路控制信息指示混合自动重传请求(HARQ)被使能，并且所述第一终端设备反馈了确认(ACK)的情况下，所述第一终端设备在所述第一定时器超时后的第一个边链路资源池内时隙的第一个符号，在边链路上处于(或保持)所述非激活或关闭状态。
附记15.根据附记14所述的方法，其中，所述第二定时器在所述第一定时器超时之后的边链路资源池内第一个符号不被启动。
附记16.根据附记1至15任一项所述的方法，其中，由所述第二终端设备选择的用于初传的资源所在时隙位于第三定时器的运行期间，所述第三定时器周期性运行且被所述第一终端设备用于非连续接收(DRX)。
附记17.根据附记16所述的方法，其中，所述第三定时器为OnDurationTimer，在所述OnDurationTimer运行期间，所述第一终端设备在边链路上处于激活(active)或开启(on)状态。
附记18.一种边链路非连续接收方法，包括：
第一终端设备接收第二终端设备发送的第一边链路控制信息，所述第一边链路控制信息中没有所述第一边链路控制信息所在时隙后指示用于重传的预留资源；以及
所述第一终端设备在接收到所述第一边链路控制信息并经过资源池内预定时隙数目之后在边链路上处于激活或开启状态。
附记19.根据附记18所述的方法，其中，所述方法还包括：
从接收到所述第一边链路控制信息的时隙之后的边链路资源池内第一个时隙的第一个符号，到所述第一边链路控制信息所在时隙之后的边链路资源池内预定时隙数目的最后一个符号，所述第一终端设备在边链路上处于非激活或关闭状态。
附记20.根据附记18或19所述的方法，其中，所述第一终端设备为所述第一边链路控制信息和/或对应的物理边链路共享信道(PSSCH)的意向(intended)接收终端。
附记21.根据附记20所述的方法，其中，所述第一边链路控制信息中指示的目的标识与所述第一终端设备的标识相同，或者，所述目的标识包括所述第一终端设备的标识，或者，所述第一边链路控制信息指示所述第一终端设备感兴趣的业务。
附记22.根据附记19所述的方法，其中，所述第一终端设备针对边链路进程，从所述第一终端设备接收到所述第一边链路控制信息的时隙之后的第一个边链路资源池内时隙的第一个符号启动第一定时器。
附记23.根据附记22所述的方法，其中，所述第一定时器为drx-HARQ-RTT-TimerSL， 在所述drx-HARQ-RTT-TimerSL运行期间，所述第一终端设备在边链路上处于非激活(inactive)或关闭(off)状态。
附记24.根据附记22所述的方法，其中，所述第一定时器的值为时隙个数，所述个数为边链路资源池内预定时隙数目；每经过一个边链路资源池时隙，所述第一定时器的值减1。
附记25.根据附记24所述的方法，其中，所述边链路资源池内预定时隙数目为31。
附记26.根据附记22至25任一项所述的方法，其中，所述方法还包括：
在所述第一边链路控制信息指示混合自动重传请求被去使能，或者在所述第一边链路控制信息指示混合自动重传请求被使能且所述第一终端设备反馈了非确认(NACK)的情况下，在所述第一定时器超时后的第一个边链路资源池内时隙的第一个符号，所述第一终端设备针对所述边链路进程启动第二定时器并进入所述激活或开启状态。
附记27.根据附记26所述的方法，其中，所述第二定时器为drx-Retransmission TimerSL，在所述drx-RetransmissionTimerSL运行期间，所述第一终端设备在边链路上处于激活(active)或开启(on)状态。
附记28.根据附记26或27所述的方法，其中，所述第二定时器在所述第一定时器超时之后的第一个资源池内时隙的第一个符号被启动，所述第二定时器的值为连续的多个边链路资源池内时隙的个数；每经过一个边链路资源池时隙，所述第二定时器的值减1。
附记29.根据附记26至28任一项所述的方法，其中，所述方法还包括：
所述第一终端设备根据所述第一边链路控制信息对应的物理边链路共享信道(PSSCH)中的边链路控制信息(2 nd stage SCI)指示是否还有重传或者重传次数，确定是否启动所述第二定时器。
附记30.根据附记26至28任一项所述的方法，其中，所述方法还包括：
所述第一终端设备根据所述第一边链路控制信息指示的优先级和/或信道忙碌率(CBR，Channel Busy Rate)，确定是否启动所述第二定时器。
附记31.根据附记30所述的方法，其中，所述第二定时器的值根据所述第一边链路控制信息指示的优先级被确定。
附记32.根据附记31所述的方法，其中，针对不同的优先级，所述第二定时器对应的候选值不同。
附记33.根据附记26至32任一项所述的方法，其中，所述方法还包括：
所述第一终端设备在所述激活或开启状态下接收第二边链路控制信息；
在接收到所述第二边链路控制信息且所述第二边链路控制信息指示的目的标识和源标识以及混合自动重传请求(HARQ)进程标识与所述第一边链路控制信息指示的目的标识和源标识以及混合自动重传请求(HARQ)进程标识相同的情况下，停止所述第二定时器。
附记34.根据附记22至25任一项所述的方法，其中，所述方法还包括：
在所述第一边链路控制信息指示混合自动重传请求(HARQ)被使能，并且所述第一终端设备反馈了确认(ACK)的情况下，所述第一终端设备在所述第一定时器超时后的第一个边链路资源池内时隙的第一个符号，在边链路上保持所述非激活或关闭状态。
附记35.根据附记34所述的方法，其中，所述第二定时器在所述第一定时器超时之后的第一个边链路资源池内时隙的第一个符号不被启动。
附记36.根据附记18至35任一项所述的方法，其中，由所述第二终端设备选择的用于初传的资源所在时隙位于第三定时器的运行期间，所述第三定时器周期性运行且被所述第一终端设备用于非连续接收(DRX)。
附记37.根据附记36所述的方法，其中，所述第三定时器为OnDurationTimer，在所述OnDurationTimer运行期间，所述第一终端设备处于激活(active)或开启(on)状态。
附记38.一种边链路非连续接收方法，包括：
第一终端设备接收第二终端设备发送的第三边链路控制信息，所述第三边链路控制信息中指示有所述第三边链路控制信息所在时隙后用于重传的第一预留资源；以及
在所述第一预留资源上没有接收到对应的物理边链路控制信道(PSCCH)的情况下，所述第一终端设备从所述第一预留资源所在的时隙之后的边链路资源池内第一个时隙的第一个符号开始，在边链路资源池内的多个连续时隙处于激活或开启状态。
附记39.根据附记38所述的方法，其中，所述第一终端设备为所述第三边链路控制信息和/或对应的物理边链路共享信道(PSSCH)的意向(intended)接收终端。
附记40.根据附记39所述的方法，其中，所述第三边链路控制信息中指示的目的标识与所述第一终端设备的标识相同，或者，所述目的标识包括所述第一终端设备的标识，或者，所述第三边链路控制信息指示所述第一终端设备感兴趣的业务。
附记41.根据附记38至40任一项所述的方法，其中，所述第一终端设备还针对边 链路进程，在当前时隙之后的边链路资源池内第一个符号启动第二定时器。
附记42.根据附记41所述的方法，其中，所述第二定时器为drx-RetransmissionTimer SL，在所述drx-RetransmissionTimerSL运行期间，所述第一终端设备处于激活(active)或开启(on)状态。
附记43.根据附记41所述的方法，其中，在所述第一终端设备获知所述第一预留资源后还有用于所述重传的第二预留资源的情况下，所述第二定时器的值为从所述第一终端设备接收到所述第一边链路控制信息的时隙之后的第一个边链路资源池内时隙，到边链路资源池内所述第二预留资源所在时隙的期间内所包含的资源池内时隙总数；每经过一个边链路资源池内时隙，所述第二定时器的值减1。
附记44.根据附记41所述的方法，其中，在所述第一终端设备获知所述第一预留资源后没有用于所述重传的第二预留资源、或者所述第一终端设备不知道后续资源的情况下，所述第二定时器的值为边链路资源池内预定时隙数目；每经过一个边链路资源池内时隙，所述第二定时器的值减1。
附记45.根据附记44所述的方法，其中，所述边链路资源池内预定时隙数目为31。
附记46.根据附记41所述的方法，其中，所述第二定时器的值根据所述第三边链路控制信息指示的优先级被确定。
附记47.根据附记38至46任一项所述的方法，其中，所述方法还包括：
所述第一终端设备在所述激活或开启状态下接收第四边链路控制信息；
在接收到所述第四边链路控制信息且所述第四边链路控制信息指示的目的标识和源标识以及混合自动重传请求(HARQ)进程标识与所述第三边链路控制信息指示的目的标识和源标识以及混合自动重传请求(HARQ)进程标识相同的情况下，停止所述第二定时器。
附记48.根据附记38至47任一项所述的方法，其中，由所述第二终端设备选择的用于初传的资源所在时隙位于第三定时器的运行期间，所述第三定时器周期性运行且被所述第一终端设备用于非连续接收(DRX)。
附记49.根据附记48所述的方法，其中，所述第三定时器为OnDurationTimer，在所述OnDurationTimer运行期间，所述第一终端设备在边链路上处于激活(active)或开启(on)状态。
附记50.根据附记38至49任一项所述的方法，其中，由所述第二终端设备对所述第一预留资源进行重选的重选资源位于所述第一预留资源之后。
附记51.一种终端设备，包括存储器和处理器，所述存储器存储有计算机程序，所述处理器被配置为执行所述计算机程序而实现如附记1至50任一项所述的边链路非连续接收方法。
附记52.一种通信系统，包括：
第一终端设备，其接收第一边链路控制信息，所述第一边链路控制信息中指示有所述第一边链路控制信息所在时隙后用于重传的预留资源；以及在所述预留资源所在时隙在边链路上处于激活或开启状态；
第二终端设备，其发送所述第一边链路控制信息。
附记53.一种通信系统，包括：
第一终端设备，其接收第一边链路控制信息，所述第一边链路控制信息中没有指示所述第一边链路控制信息所在时隙后用于重传的预留资源；以及在接收到所述第一边链路控制信息并经过资源池内预定时隙数目之后，在边链路上处于激活或开启状态；
第二终端设备，其发送所述第一边链路控制信息。
附记54.一种通信系统，包括：
第一终端设备，其接收第三边链路控制信息，所述第三边链路控制信息中指示有所述第三边链路控制信息所在时隙后用于重传的第一预留资源；以及在所述第一预留资源上没有接收到对应的物理边链路控制信道的情况下，从所述第一预留资源所在的时隙之后的边链路资源池内第一个时隙的第一个符号开始，在边链路资源池内的多个连续时隙处于激活或开启状态；
第二终端设备，其发送所述第三边链路控制信息。

Claims (20)

  1. 一种边链路非连续接收装置，配置于第一终端设备，所述装置包括：
    接收单元，其接收第二终端设备发送的第一边链路控制信息，所述第一边链路控制信息中指示有所述第一边链路控制信息所在时隙后用于重传的预留资源；以及
    处理单元，其在所述预留资源所在时隙，使所述第一终端设备在边链路上处于激活或开启状态。
  2. 根据权利要求1所述的装置，其中，从所述预留资源所在时隙的第一个符号开始，所述第一终端设备在边链路上被激活或开启，并持续边链路资源池内的一个时隙或多个连续时隙。
  3. 根据权利要求1所述的装置，其中，所述第一终端设备为所述第一边链路控制信息和/或对应的物理边链路共享信道的意向接收终端；
    其中，所述第一边链路控制信息中指示的目的标识与所述第一终端设备的标识相同，或者，所述目的标识包括所述第一终端设备的标识，或者，所述第一边链路控制信息指示所述第一终端设备感兴趣的业务。
  4. 根据权利要求1所述的装置，其中，所述处理单元针对边链路进程，从所述第一终端设备接收到所述第一边链路控制信息的时隙之后的第一个边链路资源池内时隙的第一个符号启动第一定时器。
  5. 根据权利要求4所述的装置，其中，所述第一定时器的值为时隙个数，所述时隙个数为从所述第一终端设备接收到所述第一边链路控制信息的时隙之后的第一个边链路资源池内时隙，到在所述第一边链路控制信息中指示的用于下一次发送的预留资源所在时隙的前一个边链路资源池内时隙的期间所包含的资源池内时隙总数。
  6. 根据权利要求4所述的装置，其中，在所述第一边链路控制信息指示混合自动重传请求被去使能，或者在所述第一边链路控制信息指示混合自动重传请求被使能且所述第一终端设备反馈了非确认的情况下，在所述第一定时器超时之后的第一个边链路资源池内时隙的第一个符号，所述处理单元针对所述边链路进程启动第二定时器并且使所述第一终端设备进入所述激活或开启状态。
  7. 根据权利要求6所述的装置，其中，所述接收单元还在所述激活或开启状态下接收第二边链路控制信息；
    在接收到所述第二边链路控制信息且所述第二边链路控制信息指示的目的标识和源标识以及混合自动重传请求进程标识与所述第一边链路控制信息指示的目的标识和源标识以及混合自动重传请求进程标识相同的情况下，所述处理单元停止所述第二定时器。
  8. 根据权利要求4所述的装置，其中，在所述第一边链路控制信息指示混合自动重传请求被使能，并且所述第一终端设备反馈了确认的情况下，在所述第一定时器超时之后的第一个边链路资源池内时隙的第一个符号，所述第一终端设备针对所述边链路进程不启动第二定时器。
  9. 根据权利要求1所述的装置，其中，由所述第二终端设备选择的用于初传的资源所在时隙位于第三定时器的运行期间，所述第三定时器周期性运行且被所述第一终端设备用于非连续接收。
  10. 一种边链路非连续接收装置，配置于第一终端设备，所述装置包括：
    接收单元，其接收第二终端设备发送的第一边链路控制信息，所述第一边链路控制信息中没有指示所述第一边链路控制信息所在时隙后用于重传的预留资源；以及
    处理单元，其在接收到所述第一边链路控制信息并经过资源池内预定时隙数目之后，使所述第一终端设备在边链路上处于激活或开启状态。
  11. 根据权利要求10所述的装置，其中，所述处理单元针对边链路进程，从所述第一终端设备接收到所述第一边链路控制信息的时隙之后的第一个边链路资源池内时隙的第一个符号启动第一定时器；
    所述第一定时器的值为边链路资源池内预定时隙数目31。
  12. 根据权利要求11所述的装置，其中，在所述第一边链路控制信息指示混合自动重传请求被去使能，或者在所述第一边链路控制信息指示混合自动重传请求被使能且所述第一终端设备反馈了非确认的情况下，在所述第一定时器超时后的下一个边链路资源池内时隙的第一个符号，所述处理单元针对所述边链路进程启动第二定时器并使所述第一终端设备进入所述激活或开启状态；
    所述第二定时器的值为连续的多个边链路资源池内时隙的个数。
  13. 根据权利要求11所述的装置，其中，在所述第一边链路控制信息指示混合自动重传请求被使能，且所述第一终端设备反馈了确认的情况下，在所述第一定时器超时后的下一个边链路资源池内时隙的第一个符号，所述处理单元针对所述边链路进程不启动第二定时器。
  14. 根据权利要求12所述的装置，其中，
    所述处理单元根据所述第一边链路控制信息对应的物理边链路共享信道中的第二级边链路控制信息指示还有后续重传，启动所述第二定时器；或者
    根据所述第一边链路控制信息指示的优先级和/或信道忙碌率，确定是否启动所述第二定时器。
  15. 根据权利要求14所述的装置，其中，所述第二定时器的值根据所述第一边链路控制信息指示的优先级被确定；针对不同的优先级，所述第二定时器对应的候选值不同。
  16. 一种边链路非连续接收装置，配置于第一终端设备，所述装置包括：
    接收单元，其接收第二终端设备发送的第三边链路控制信息，所述第三边链路控制信息中指示有所述第三边链路控制信息所在时隙后用于重传的第一预留资源；以及
    处理单元，其在所述第一预留资源上没有接收到对应的物理边链路控制信道的情况下，从所述第一预留资源所在的时隙之后的边链路资源池内第一个时隙的第一个符号开始，使所述第一终端设备在边链路资源池内的多个连续时隙处于激活或开启状态。
  17. 根据权利要求16所述的装置，其中，所述处理单元还针对边链路进程，在当前时隙之后的边链路资源池内第一个符号启动第二定时器。
  18. 根据权利要求17所述的装置，其中，在所述第一终端设备获知所述第一预留资源后还有用于所述重传的第二预留资源的情况下，所述第二定时器的值为从所述第一终端设备接收到所述第三边链路控制信息的时隙之后的第一个边链路资源池内时隙，到边链路资源池内所述第二预留资源所在时隙的期间内所包含的资源池内时隙总数。
  19. 根据权利要求17所述的装置，其中，在所述第一终端设备获知所述第一预留资源后没有用于所述重传的第二预留资源、或者所述第一终端设备不知道后续资源的情况下，所述第二定时器的值为边链路资源池内预定时隙数目。
  20. 根据权利要求16所述的装置，其中，由所述第二终端设备对所述第一预留资源进行重选的重选资源位于所述第一预留资源之后。
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