WO2020216297A1 - 通信方法和通信装置 - Google Patents

通信方法和通信装置 Download PDF

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Publication number
WO2020216297A1
WO2020216297A1 PCT/CN2020/086424 CN2020086424W WO2020216297A1 WO 2020216297 A1 WO2020216297 A1 WO 2020216297A1 CN 2020086424 W CN2020086424 W CN 2020086424W WO 2020216297 A1 WO2020216297 A1 WO 2020216297A1
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WO
WIPO (PCT)
Prior art keywords
time unit
time
symbol
periodic data
unit set
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PCT/CN2020/086424
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English (en)
French (fr)
Inventor
董蕾
苏宏家
向铮铮
卢磊
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to JP2021563277A priority Critical patent/JP2022529847A/ja
Priority to EP20796235.8A priority patent/EP3955676A4/en
Publication of WO2020216297A1 publication Critical patent/WO2020216297A1/zh
Priority to US17/508,632 priority patent/US12016002B2/en
Priority to JP2023092809A priority patent/JP2023123496A/ja

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446Resources in time domain, e.g. slots or frames
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/14Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/53Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044Arrangements for allocating sub-channels of the transmission path allocation of payload
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management

Definitions

  • the present application relates to the field of communication, and more specifically, to a communication method and communication device.
  • V2X communication refers to the communication between the vehicle and anything outside.
  • LTE V2X Under the long-term evolution (LTE) technology network proposed by the 3rd generation partnership project (3GPP), the vehicle-to-everything (V2X) vehicle networking technology is proposed , V2X communication refers to the communication between the vehicle and anything outside.
  • V2X under the LTE technology network can be referred to as LTE V2X for short.
  • the communication between the terminal devices involved in the V2X system is widely referred to as slide link (SL) communication.
  • the LTE V2X communication can support communication scenarios with and without network coverage.
  • the SL communication resource configuration mode may be an evolved NodeB (evolved NodeB, eNB or eNodeB) scheduling mode and a terminal device self-selection mode in the LTE system.
  • evolved NodeB evolved NodeB, eNB or eNodeB
  • a terminal device self-selection mode in the LTE system.
  • 5G NR 5th generation new radio
  • V2X under the 5G NR technology network will also further develop, for example, it can support lower transmission delay and more reliable Communication transmission, higher throughput, and better user experience to meet the needs of a wider range of application scenarios.
  • the LTE V2X defined in LTE V2X for determining periodic data transmission resources, the terminal device self-selected resource mode and the network device configuration resource mode are no longer applicable in the 5G NR scenario, so How to determine the transmission resources of periodic data in 5G NR scenarios has become an urgent problem to be solved.
  • the present application provides a communication method and communication device.
  • the first time unit for sending periodic data is determined from the first time unit set, and the first time unit is determined from the first time unit set based on the first time domain interval and the reserved number N
  • the second time unit set of periodic data is sent to realize the determination of the transmission resources of the periodic data in the 5G NR scenario.
  • a communication method including: a first terminal device determines a first time unit set, and the time units in the first time unit set can be used to transmit side link service data and side link control At least one of information and side link feedback information, wherein the first time unit set includes multiple time units, the multiple time units are numbered consecutively in a time sequence, and the time units include symbols or time Slot; the first terminal device determines the periodic data to be sent, the periodic data includes the side link service data, the side link control information and the side link feedback information At least one; the first terminal device determines the first time unit in the first time unit set, and the first time unit is used to send the periodic data; the first terminal device is based on the first time unit The domain interval and the number of reservations N determine a second time unit set in the first time unit set, and the time units in the second time unit set are used to send the periodic data, wherein the second time unit The unit set includes N-1 time units, the time domain interval between the first time unit in the second time unit set and the first time
  • the communication method provided in the embodiment of the present application when the first terminal device needs to send periodic data. First, determine the first time unit set that can be used to send periodic data according to the agreement, and then determine the first time unit and the second time unit set for sending the periodic data from the first time unit set. Wherein, the time domain interval between the time unit in the second time unit set and the first time unit can be determined based on the first time domain interval and the number of reservations N, so that the communication method provided by the embodiment of the present application can be in the time unit Configure the resources for the first terminal device to send periodic data at a granular level, so as to determine the transmission resources for periodic data in a 5G NR scenario.
  • first time unit and second time unit set are used to send periodic data, and refer to the time-frequency resources corresponding to the time domain positions indicated by the time units in the first time unit and the second time unit set. It is used to carry and send periodic data. Since this application does not involve the determination of time-frequency resource and frequency domain position, only the determination of time domain position is involved, so it is briefly described as the first time unit and the second time unit set for sending cycle Sexual data.
  • Send side uplink service data also referred to as sending physical layer side uplink data channel PSSCH
  • Sending side uplink control information also referred to as sending physical layer side uplink control channel PSCCH
  • Send side uplink feedback information also referred to as sending physical layer side uplink feedback channel PSFCH
  • At least one of the foregoing first time unit set that can be used to transmit side-link service data, side-link control information, and side-link feedback information refers to:
  • the first time unit set includes all time units in the system frame except the time unit used to send the side uplink communication synchronization signal SLSS; or.
  • the first time unit set includes all time units in the system frame except the time unit used to send the side uplink communication synchronization signal SLSS, and in TDD mode The downstream time unit and the time unit other than the special time unit; or,
  • the first time unit set includes all time units in the system frame except the time unit used to send the side uplink communication synchronization signal SLSS and the reserved time unit. ;or,
  • the first time unit set includes all time units in the system frame except for sending side uplink communication
  • different sub-carrier intervals correspond to different frame structures, that is to say, different sub-carrier intervals correspond to different sets of first time units mentioned above.
  • first terminal device does not specifically refer to a certain terminal device.
  • the communication method before the first terminal device determines the first time unit in the first time unit set, the communication method further includes: the first terminal The device receives semi-persistent scheduling SPS information from the network device, where the SPS information indicates that the first time unit in the first time unit set is used to send the periodic data, wherein the SPS information includes the period P of the SPS SPS , the P SPS is used to determine the first time domain interval.
  • the first time domain interval P'SPS is expressed as the product of the number of time units S symbol that can be used for sidelink communication transmission in a frame structure period and the number of system frames contained in the SPS period P SPS .
  • the result of the whole; the time domain interval between the Mth time unit and the first time unit in the second time unit set is M of the first time domain interval, where M is less than or equal to A positive integer of N-1.
  • the first terminal device can learn that periodic data is sent on the first time unit in the first time unit set according to the SPS information sent by the network device. Moreover, since the SPS information sent by the network device carries the period of the SPS, the first terminal device can further determine the first terminal device based on the period of the SPS and the period of the SPS known by itself P SPS and the S symbol . A second time unit set for sending periodic data in a time unit set.
  • N is a predefined value.
  • the value of this value may be equal to the value of the first time domain interval mentioned above.
  • the time domain interval between M time units can be expressed by the expression M ⁇ P' SPS .
  • the first terminal device determining the first time unit in the first time unit set includes: the first terminal device determining the third time unit set The first terminal device determines at least one time unit reserved by the historical periodic data in the fourth time unit set; the first terminal device determines the first time unit from the remaining time units A time unit, wherein the remaining time unit is the time unit remaining after a time unit meeting a preset time relationship with at least one time unit reserved for the historical periodic data is excluded from the fourth time unit set, wherein , The periodic data arrives at a third time unit, the third time unit set includes P time units before the third time unit, the P is a positive integer, and the third time unit set is A subset of the first time unit set, the fourth time unit set is a subset of the first time unit set, and the start time unit in the fourth time unit set is later than the third time unit ,
  • the P time units are consecutively numbered from n'-P to n'-1; the n'includes: when
  • the first terminal device can independently detect whether the historical periodic data sent in multiple time units before the detection period data arrives is in the fourth time unit set.
  • the reserved time unit satisfies the time unit of the preset relationship, and the time unit reserved with the historical periodic data in the fourth time unit set meets the preset relationship (that is, the time unit that cannot be used to send the above periodic data is excluded Data time unit), and select the above-mentioned first time unit from the remaining time units in the fourth time unit set. That is to say, the first terminal device of the communication method provided in the embodiment of the present application may not need to be configured by the network device, Determine the first time unit for sending periodic data in the first time unit set by itself.
  • the first terminal device selecting the first time unit from the remaining time units in the fourth time unit set may be any time unit selected as the first time unit, or it may be calculated based on the remaining time units.
  • the average energy value, and the time unit with the smaller average energy is selected as the first time unit.
  • the at least one time unit of the historical periodic data reservation involved in the embodiment of the present application refers to when the historical periodic data arrives at the first terminal device. Since the data is periodic, the first terminal device It is determined that it is necessary to reserve a time unit for the historical periodic data. In theory, no other data can be transmitted on the reserved time unit and can only be used to transmit the historical periodic data, that is to say, if the fourth time unit set includes When at least one of the time units is reserved, the at least one time unit cannot be used to transmit the periodic data received by the first terminal device in the third time unit.
  • this application does not restrict the content of historical periodic data from not changing in any way. That is to say, the data transmitted by at least one time unit reserved for the historical periodic data can still be the historical periodic data, or the historical periodic data. Data after periodic data changes.
  • the P N ⁇ S symbol time units are consecutively numbered from n'-P N ⁇ S symbol to n'-1, where the specific value of P N may be configured by the network device to the first terminal device through high-level signaling, It may also be pre-defined by the agreement, which is not limited in this application.
  • the third time unit set includes 100 ⁇ S symbol time units before the third time unit, where the number of the 100 ⁇ S symbol time units ranges from n'-100 ⁇ S symbol to n'-1 order.
  • P is pre-configured or configured by high-level signaling.
  • the first terminal device determining the historical periodic data sent in the third time unit set includes: the first terminal device determining the third time unit The first historical periodic data of the first terminal device on the fourth time unit in the set; the first terminal device determines that the at least one time unit reserved by the historical periodic data in the fourth time unit set includes: The first terminal device determines at least one time unit reserved by the first historical periodic data in a fourth time unit set.
  • the first terminal device when the first terminal device removes the time unit that cannot be used to send periodic data in the fourth time unit set, it should consider the time unit sent by itself in the third time unit set.
  • the time unit reserved by historical periodic data needs to be excluded from the fourth time unit set and the time unit reserved with the first historical periodic data sent by itself meets the preset relational expression.
  • the remaining time unit includes: at least one time unit in the fourth time unit set excluding reservation with the first historical periodic data satisfies the first A time unit of a preset time relationship; wherein the first preset time relationship is that there is a natural number j such that:
  • y+j ⁇ [S symbol ⁇ P rsvp_TX /N symbol ] z+q ⁇ [S symbol ⁇ P′′ rsvp_TX /N symbol ], where z+q ⁇ [S symbol ⁇ P′′ rsvp_TX /N symbol ] means The number of at least one time unit reserved for the first historical periodic data, z is the number of the fourth time unit, q is a positive integer less than or equal to Q 1 , and y is the number reserved for the first historical periodic data At least one time unit of, the number of the time unit that meets the first preset time relationship, j is a natural number less than or equal to C resel -1, C resel is the reserved number of periodic data, and N symbol represents a preset frame The total number of time units in a frame structure period under the structure configuration, S symbol represents the number of time units available for sidelink communication transmission in a frame structure period, P rsvp_TX represents the reservation period of the periodic data, so The
  • the reserved time unit of the data sent by itself on the fourth time unit in the third time unit set and the time unit that needs to be excluded in the fourth time unit set have a natural number j such that the number is The time unit of y satisfies the equation:
  • the first preset time relationship in the present application refers to the fact that there is a natural number j that makes the above equation hold, and the time unit in the fourth time unit set corresponding to y in the equation needs to be excluded.
  • the unit of the data reservation period involved in this application is a time unit.
  • time unit of the first historical periodic data sent by the first terminal device does not exist in the third time unit set, there is no need to perform the above-mentioned exclusion from the fourth time unit set and the time unit sent by itself.
  • the time unit reserved for historical periodic data meets the time unit of the first preset time relationship.
  • the determining, by the first terminal device, that the historical periodic data sent in the third time unit set includes: the first terminal device intercepts the data from the second terminal Side link control information SCI of the device, where the SCI is used to indicate the second historical periodic data of the second terminal device;
  • the first terminal device decodes the SCI to obtain the period P rsvp_RX and the priority prio RX of the second historical periodic data, and the P rsvp_RX and prio RX are used to determine the threshold values Th prioTX, prioRX
  • the second terminal device is a terminal device other than the first terminal device; the first terminal device determines that the at least one time unit reserved for the historical periodic data in the fourth time unit set includes: the first terminal device A terminal device determines that the measurement result of the reference signal received power RSRP of the second historical periodic data on the fifth time unit in the third time unit set is greater than the Th prioTX, prioRX , and the first terminal device determines At least one time unit reserved by the second historical periodic data in the fourth time unit set.
  • the first terminal device when the first terminal device removes the time unit that cannot be used to send the above-mentioned periodic data in the fourth time unit set, it should also consider the time unit in the third time unit set.
  • the time units reserved for historical periodic data sent by other terminal devices are excluded from the fourth time unit set and time units reserved for historical periodic data sent by other terminal devices meet the preset formula.
  • the ratio of the remaining time units in the fourth time unit set occupies less than 20% of the total number of time units in the fourth time unit set, the above thresholds Th prioTX and prioRX need to be adjusted until the first The ratio of the remaining time units in the four time unit set occupying the total number of time units in the fourth time unit set is greater than or equal to 20%.
  • the foregoing second terminal device does not specifically refer to a certain terminal device, but may refer to one or more terminal devices other than the foregoing first terminal device, and it may be understood that the foregoing first terminal device may Listen to whether at least one other terminal device has sent historical periodic data on the third time unit set, and whether the reserved time unit of the historical periodic data is included in the fourth time unit set.
  • the remaining time unit includes: at least one time unit in the fourth time unit set excluding reservation with the second historical periodic data satisfies the first 2.
  • y'+j ⁇ [S symbol ⁇ P rsvp_TX /N symbol ] z'+q ⁇ [S symbol ⁇ P rsvp_RX /N symbol ], where z'+q ⁇ [S symbol ⁇ P rsvp_RX /N symbol ] means historical data of the second periodic number of the at least one reservation time unit, z 'is a number in the fifth time unit, q is a positive integer less than or equal to Q 2, y' is the second data and the history of periodic At least one reserved time unit is the number of the time unit meeting the second preset time relationship, j is a natural number less than or equal to C resel -1, C resel is the reserved number of the periodic data, and S symbol represents a frame structure The number of time units available for side-link communication transmission in a cycle, N symbol represents the total number of time units in a frame structure period, P rsvp_TX represents the periodic data reservation period, and the unit of the periodic data reservation period
  • the second preset time relationship in the present application refers to the fact that there is a natural number j that makes the above equation true, and the time unit in the fourth time unit set corresponding to y in the equation needs to be excluded.
  • the first time domain interval P'rsvp_TX is expressed as the number of time units S symbol that can be used for sidelink communication transmission in a frame structure period and the The product of the number of system frames contained in the periodic data reservation period P rsvp_TX ; the time domain interval between the M-th time unit and the first time unit in the second time unit set is M first time units Time domain interval, where the M is a positive integer less than or equal to N-1.
  • the first terminal device determines the first time unit in the fourth time unit set, it can be based on the time domain interval between the time units in the first time unit and the second time unit set. Relationship, determine the second time unit set. In this way, periodic data is sent on the first time unit and the second time unit set.
  • the number of system frames included in the periodic data reservation period P rsvp_TX is expressed as the periodic data reservation period P rsvp_TX and the one frame structure
  • the ratio of the total number of time units in a period N symbo , then the first time domain interval P'rsvp_TX is expressed as P'rsvp_TX [S symbol ⁇ P rsvp_TX /N symbol ], [] means rounding down or up Operation.
  • the time domain interval between M time units can be expressed by the expression M ⁇ P' rsvp_TX
  • a communication method including: a network device determines semi-persistent scheduling SPS information, where the SPS information is used to indicate that a first terminal device can send periodic data through a first time unit in a first time unit set , Wherein the SPS information includes the period P SPS of the SPS , and the P SPS is used to determine the first time domain interval,
  • the first time domain interval P'SPS is expressed as the product of the number of time units S symbol available for sidelink communication transmission in a frame structure period and the number of system frames contained in the SPS period P SPS ;
  • the time unit in the first time unit set can be used to transmit at least one of side link service data, side link control information, and side link feedback information, and the first time unit set includes multiple times Unit, the multiple time units are consecutively numbered in time sequence, the first time domain interval and the number of reservations N are used to determine a second time unit set in the first time unit set, and the second time unit
  • the time unit in the set is used for the first terminal device to send the periodic data, the second time unit set includes N-1 time units, and the first time unit in the second time unit set is The time domain interval between the first time unit is the first time domain interval, and the time domain interval between any two adjacent time units in the second time unit set is the first time domain interval. Time domain interval, the number of the time unit in the second time unit set is greater than the number of the first time unit
  • the network device sends SPS information to the first terminal device, indicating that the first terminal device can send periodic data through the first time unit in the first time unit set. Moreover, since the SPS information sent by the network device carries the period of the SPS, the first terminal device can further determine the first terminal device based on the period of the SPS and the period of the SPS known by itself P SPS and the S symbol . A second time unit set for sending periodic data in a time unit set.
  • the time domain interval between M time units can be expressed by the expression M ⁇ P' SPS .
  • the time domain interval between the M-th time unit and the first time unit in the second time unit set is M first time units Domain interval, where the M is a positive integer less than or equal to N-1.
  • the time domain interval between the first time unit and the time unit in the second time unit set satisfies a certain relationship, and the second time unit set can be determined based on the first time unit.
  • periodic data is sent on the first time unit and the second time unit set.
  • a communication device which can be used to perform the operation of the first terminal device in the first aspect and any possible implementation manner of the first aspect.
  • the communication device includes means for performing the steps or functions described in the first aspect above, which may be the first terminal device of the first aspect or a chip or functional module inside the first terminal device.
  • the steps or functions can be realized by software, or by hardware, or by a combination of hardware and software.
  • a communication device which can be used to perform the operation of the network device in the second aspect and any possible implementation manner of the second aspect.
  • the communication device may include a means for executing the steps or functions described in the second aspect above, which may be the network device of the second aspect or a chip or functional module inside the network device.
  • the steps or functions can be realized by software, or by hardware, or by a combination of hardware and software.
  • a communication device including a processor, a transceiver, and a memory, where the memory is used to store a computer program, and the transceiver is used to execute any one of the possible implementations of the first or second aspects
  • the processor is used to call and run the computer program from the memory, so that the communication device executes the communication method in any one of the possible implementation manners of the first or second aspect.
  • processors there are one or more processors and one or more memories.
  • the memory may be integrated with the processor, or the memory and the processor may be provided separately.
  • the transceiver includes a transmitter (transmitter) and a receiver (receiver).
  • a communication device including a transceiver, a processor, and a memory.
  • the processor is used to control the transceiver to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the communication device executes the first aspect or any possible implementation manner of the first aspect Method in.
  • a communication device including a transceiver, a processor, and a memory.
  • the processor is used to control the transceiver to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the communication device executes the second aspect or any possible implementation manner of the second aspect Method in.
  • a system in a sixth aspect, includes the communication devices provided in the third aspect and the fourth aspect.
  • a computer program product includes: a computer program (also referred to as code or instructions), which when the computer program is executed, causes the computer to execute any of the first or second aspects above.
  • a computer program also referred to as code or instructions
  • a computer-readable medium stores a computer program (also called code, or instruction) when it runs on a computer, so that the computer executes the first or second aspect above Any one of the possible implementation methods.
  • a computer program also called code, or instruction
  • a chip system including a memory and a processor, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that a communication device installed with the chip system executes the foregoing The method in any one of the possible implementation manners of the first aspect or the second aspect.
  • FIG. 1 is a schematic diagram of a V2X system in the prior art.
  • Fig. 2 is a schematic block diagram of a communication system applicable to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of PSSCH transmission provided by an embodiment of the present application.
  • Fig. 4 is a schematic diagram of a subframe for transmitting PSSCH provided by an embodiment of the present application.
  • Fig. 5 is a schematic diagram of a subframe set provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a frame structure provided by an embodiment of the present application.
  • Fig. 7 is a schematic diagram of a time slot type provided by an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a frame structure provided by an embodiment of the present application.
  • Fig. 10 is a schematic diagram of a time unit set provided by an embodiment of the present application.
  • FIG. 11 is a schematic diagram of the communication device 10 proposed in this application.
  • FIG. 12 is a schematic structural diagram of a first terminal device 20 applicable to an embodiment of the present application.
  • FIG. 13 is a schematic diagram of the communication device 30 proposed in this application.
  • FIG. 14 is a schematic structural diagram of a network device 40 applicable to an embodiment of the present application.
  • GSM global system for mobile communications
  • CDMA code division multiple access
  • WCDMA broadband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD LTE Time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • the first terminal device in the embodiments of the present application may refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal , Wireless communication equipment, user agent or user device.
  • the first terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), Handheld devices, computing devices, or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices with wireless communication functions, terminal devices in the future 5G network, or public land mobile network (PLMN) evolved in the future This is not limited by the embodiment of the present application.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • Handheld devices computing devices, or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices with wireless communication functions, terminal devices in the future 5G network, or public land mobile network (PLMN) evolved in
  • the network device in the embodiment of the application may be a device used to communicate with the first terminal device, and the network device may be a global system for mobile communications (GSM) system or code division multiple access
  • GSM global system for mobile communications
  • the base station (transceiver station, BTS) in CDMA) can also be the base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolved base station in the LTE system (evolved NodeB, eNB or eNodeB), it can also be a wireless controller in the cloud radio access network (CRAN) scenario, or the network device can be a relay station, an access point, a vehicle-mounted device, or a wearable device
  • the embodiment of the present application is not limited.
  • the first terminal device or network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the application do not specifically limit the specific structure of the execution subject of the methods provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided according to the embodiments of the application.
  • the execution subject of the method provided in the embodiment of the present application may be the first terminal device or network device, or a functional module in the first terminal device or network device that can call and execute the program.
  • computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CDs), digital versatile discs (digital versatile discs, DVDs) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
  • magnetic storage devices for example, hard disks, floppy disks, or tapes, etc.
  • optical disks for example, compact discs (CDs), digital versatile discs (digital versatile discs, DVDs) Etc.
  • smart cards and flash memory devices for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.
  • various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.
  • D2D communication technology With the development of wireless communication technology, people’s demand for high data rates and user experience is increasing. At the same time, people’s demand for proximity services that understand and communicate with people or things around them is gradually increasing. Therefore, device to device (device to device, D2D) communication technology came into being.
  • the application of D2D communication technology can reduce the burden on cellular networks, reduce battery power consumption of terminal devices, increase data rates, and meet the needs of proximity services.
  • D2D communication technology allows multiple terminal devices that support D2D functions to directly discover and communicate directly with or without network infrastructure.
  • an application scenario for the Internet of Vehicles based on the D2D communication technology has been proposed. However, due to security considerations, the delay requirements in this scenario are very high, and the existing D2D communication technology cannot be implemented.
  • V2X vehicle to everything
  • X stands for anything
  • the communication methods in the V2X system are collectively referred to as V2X communication.
  • the V2X communication includes: vehicle-to-vehicle (V2V) communication, vehicle to roadside infrastructure (vehicle to infrastructure, V2I) communication, vehicle to pedestrian communication (vehicle to vehicle, V2V) pedestrian, V2P) or vehicle-to-network (V2N) communication, etc.
  • V2V vehicle-to-vehicle
  • V2I vehicle to roadside infrastructure
  • V2N vehicle-to-network
  • the communication between the terminal devices involved in the V2X system is widely referred to as slide link (SL) communication.
  • FIG. 1 is a schematic diagram of a V2X system in the prior art. The diagram includes V2V communication, V2P communication, and V2I/N communication.
  • V2X communication is aimed at high-speed devices represented by vehicles. It is the basic technology and key technology applied in scenarios with very high communication delay requirements in the future, such as smart cars, autonomous driving, and intelligent transportation systems.
  • Roadside infrastructure for example, roadside unit (RSU) includes two types: one is a terminal device type RSU.
  • the RSU of this terminal equipment type Since the RSU is distributed on the roadside, the RSU of this terminal equipment type is in a non-mobile state, and there is no need to consider mobility; the other is the RSU of the network equipment type.
  • the RSU of this network device type can provide timing synchronization and resource scheduling for vehicles communicating with the network device.
  • Vehicles and people for example, vehicles and pedestrians, vehicles and cyclists, vehicles and drivers, or vehicles and passengers
  • V2N communicate through V2N.
  • V2N and the aforementioned V2I can be collectively referred to as V2I/N.
  • FIG. 1 is only an exemplary schematic diagram shown for introducing the V2X system, and does not constitute any limitation to the application.
  • the number of vehicles, the number of pedestrians, and the number of infrastructure can be multiple, not the number shown in FIG. 1.
  • Fig. 1 briefly introduces the V2X system involved in the prior art, and the following briefly introduces the applicable scenarios of the implementation provided by this application in conjunction with Fig. 2.
  • Fig. 2 is a schematic block diagram of a communication system suitable for an embodiment of the present application.
  • the terminal device 121 and the network device 110 can determine the resources used to transmit data with the terminal device 122 through signaling interaction, and then the terminal device 121 Use the determined resource to communicate with the terminal device 122; or, before transmitting data, the terminal device 122 and the network device 110 can determine the resource used to transmit data with the terminal device 121 through signaling interaction, and then the terminal device 122 uses the determined The resource communicates with the terminal device 121. That is, the embodiment of the present application is applied to an application scenario of side link data transmission.
  • FIG. 2 is only a schematic diagram and does not constitute any limitation to the protection scope of the present application.
  • the number of terminal devices shown in FIG. 2 is just an example.
  • side link communication the communication between the terminal devices involved in the above-mentioned V2X system is referred to as sidelink communication, which does not constitute any limitation to this application.
  • side link communication can also be called side link communication, direct link communication, or secondary link communication; in addition, it is not necessarily limited to the V2X system.
  • communication between terminal devices It can also be called side link communication.
  • FIG 2 illustrates the applicable scenarios of the embodiments of the present application.
  • the following briefly introduces several basic concepts involved in the technical solutions of the present application.
  • LTE frame structure and 5G NR frame structure mainly involves LTE frame structure and 5G NR frame structure.
  • LTE frame structure and the 5G NR frame structure have been defined in detail in the existing protocol, and the definition of the LTE frame structure and the 5G NR frame structure in the existing protocol is directly applied in this application. Therefore, the frame structure is only briefly described in this application, and the relevant content can be referred to the provisions in the existing agreement.
  • the specific LTE frame structure and 5G NR frame structure are not described in detail in this application.
  • LTE is divided into two different duplex modes.
  • the most direct effect of the different duplex modes is on the air interface radio frame structure.
  • FDD uses frequency to distinguish between uplink and downlink, its unidirectional resources are continuous in time;
  • TDD uses time to distinguish between uplink and downlink.
  • the resources in one direction are discontinuous in time, and a guard interval is required to avoid interference between the two directions. Therefore, LTE is designed for FDD and TDD respectively.
  • the respective frame structure is designed for FDD and TDD respectively.
  • LTE has designed the following special frame structure to meet the needs of uplink and downlink time conversion in TDD mode:
  • the wireless frame structure is adopted.
  • the length of the wireless frame is 10ms. It is composed of two half-frames with a length of 5ms. Each half-frame is composed of 5 subframes with a length of 1ms. Among them, there are 4 ordinary subframes and 1 special subframe. frame. Therefore, the entire frame can also be understood as being divided into 10 subframes with a length of 1 ms as the unit of data scheduling and transmission (ie, TTI).
  • the special subframe includes three parts: downlink pilot time slot (DwPTS), guard period (GP), and uplink pilot time slot (UpPTS). DwPTS transmits downlink reference signals, and can also transmit some control information. UpPTS can transmit some short random access channel (RACH) and channel sounding reference signal (sounding reference signal, SRS) information, and GP is the guard time between uplink and downlink.
  • RACH random access channel
  • SRS sounding reference signal
  • the LTE FDD type radio frame length is 10ms, and each frame contains 10 subframes and 20 time slots. Each subframe has two time slots, and each time slot is 0.5 ms. Each time slot of LTE may have several physical resource blocks (physical resource blocks, PRBs), and each PRB contains multiple subcarriers.
  • PRBs physical resource blocks
  • 5G NR Compared with LTE (subcarrier spacing and symbol length), 5G NR supports multiple subcarrier spacings (in LTE, there is only a subcarrier spacing of 15Khz). Others are similar to the above-mentioned LTE frame structure and will not be repeated here.
  • LTE V2X is a V2X communication technology based on mobile cellular networks, just like a mobile phone connected to 3G/4G.
  • LTE V2X defines two communication methods for vehicle applications: centralized and distributed.
  • the centralized type is also called the cellular type and requires the base station as the control center; the distributed type is also known as the direct type and does not require the base station as support.
  • LTE V2X communication can support communication scenarios with and without network coverage, and its resource configuration method can adopt the network equipment allocation mode and the terminal equipment self-selection mode.
  • the network device allocation mode is mode 3 (mode 3) defined in the LTE protocol standard, hereinafter referred to as LTE mode 3;
  • the terminal device self-selection mode is mode 4 (mode 4) defined in the LTE protocol standard. ), hereinafter referred to as LTE mode 4.
  • the network device allocation mode is mainly applied to V2X communication in the case of network coverage.
  • the network device uniformly performs resource configuration based on the report of the buffer state report (BSR) of the terminal device.
  • BSR buffer state report
  • the scheduling mode for the network equipment to allocate resources may be a semi-persistent scheduling (SPS) scheduling mode or a dynamic scheduling mode.
  • SPS scheduling mode For periodic data of terminal equipment, SPS scheduling mode can be used.
  • the SPS mode and the dynamic scheduling mode are existing scheduling modes, which can be used directly in this application, and will not be repeated here.
  • the terminal device self-selection mode is mainly used for V2X communication without network coverage. Because there is no unified resource management for network devices, V2X terminal devices can only select communication resources by themselves for V2X communication. However, in order to reduce the probability of resource selection collisions caused by the selection of at least partially overlapping communication resources with other V2X terminal devices, the method based on historical interception information is quoted:
  • SA scheduling assignment
  • LTE defines a set of subframes for transmitting the physical sidelink shared channel (PSSCH)
  • PSSCH physical sidelink shared channel
  • the PSSCH involved in this application may also be referred to as side link service data.
  • the final set of subframes for PSSCH transmission It is the remaining subframes of the total subframes in a system frame except the subframes shown in the above-mentioned three cases 1), 2), and 3). Specifically, the subframes in the foregoing subframe set are consecutively numbered in a time sequence for the remaining subframes.
  • the total subframes in a system frame have 100 subframes remaining after the aforementioned subframes for sidelink communication synchronization signals, downlink subframes and special subframes in TDD mode, and reserved subframes.
  • the aforementioned PSSCH subframe set includes the remaining 100 subframes, and the 100 subframes in the PSSCH subframe set are sequentially numbered starting from 0. Specifically, the 100 subframes in the PSSCH subframe set are sorted from small to large according to the size of the number to obtain:
  • the current resource configuration mode is an SPS mode based on periodic scheduling of network equipment.
  • the set of subframes corresponding to the time-frequency resources for transmitting PSSCH is Time, if in the subframe
  • the network device allocates a certain block of time-frequency resources to a certain terminal device in the SPS state in the subframe Used to transmit PSSCH.
  • Subframe The terminal device can use the same time-frequency resource for PSSCH transmission.
  • P SPS represents the configuration period of SPS
  • the value of P step is related to the frame structure in LTE, and the specific definition of P step is shown in Table 1. Shown:
  • the frame structure in Table 1 is an existing LTE possible frame structure; D, S, U, and D/U are the transmission status of each subframe.
  • the uplink transmission (UL) state is abbreviated as U; the downlink transmission (DL) state is abbreviated as D; the special state (special, S); the downlink or uplink transmission (downlink or uplink, D/U) state.
  • FIG. 3 is a schematic diagram of PSSCH transmission according to an embodiment of the present application. include:
  • FIG. 3 is only a schematic diagram in an example form, and does not constitute any limitation to the application.
  • PSSCH subframe set The definition of, excluding the downlink subframes and special subframes in the frame structure of Figure 3, assuming that the number of reserved subframes is 0, the set of subframes used to transmit PSSCH is shown in Figure 4, which is an implementation of this application
  • Figure 4 The example provides a schematic diagram of a subframe for PSSCH transmission.
  • the terminal device in Figure 4 transmits the PSSCH for the first time as the first uplink subframe in the first frame, and the terminal device transmits the PSSCH for the second time as the first uplink subframe in the third frame. These two subframes are in the PSSCH Subframe set
  • the interval is 4. Calculated by the following formula:
  • P′ SPS P step ⁇ P SPS /100 can be interpreted as the number of subframes in the uplink transmission state in the next system frame configured by a certain frame structure and the number of system frames contained in the SPS period P SPS product.
  • FIG. 5 is a schematic diagram of a subframe set provided by an embodiment of the present application.
  • the terminal device views the history of 10 ⁇ P step subframes (from n-10 ⁇ P step to n-1) before subframe n Listen to information (the definition of P step is the same as Table 1), exclude unavailable resources (T 1 ⁇ 4,20 ⁇ T 2 ⁇ 100) in the resource selection time window [n+T 1 ,n+T 2 ], and The available time-frequency resource of a certain block is randomly selected from the remaining resource set for transmitting the PSSCH.
  • each available resource in the resource selection time window [n+T 1 ,n+T 2 ] is defined as R x, y , where y represents the subframe number, and x represents a set of continuous time-frequency resources with a length of L .
  • a certain terminal device uses a certain block of available time-frequency resources PSSCH is transmitted in the subframe, then in the subframe , The terminal device can use the same time-frequency resource for PSSCH transmission.
  • j 1, 2,..., C resel -1
  • P'rsvp_TX P step ⁇ P rsvp_TX /100
  • P rsvp_TX represents the PSSCH reservation period of the terminal equipment
  • the definition of P step is related to the frame structure. Table 1 will not be repeated here.
  • the terminal device continuously monitors the subframe set Except the subframes where the terminal device itself has sent data.
  • the specific resource exclusion principles are as follows:
  • C resel represents the number of PSSCH reservations in mode 4
  • P′ rsvp_TX P step ⁇ P rsvp_TX /100
  • P step is related to the frame structure, as shown in Table 1.
  • n′ is defined as follows: if Belongs to subframe set for otherwise, Subframe After that, the first one belongs to the subframe set Of subframes.
  • the definition of P step is related to the frame structure, as shown in Table 1.
  • P rsvp_RX is indicated by the resource reservation field in SCI format 1 (format-1). The definition is shown in Table 2. The specific value X is PSSCH Divide the appointment period by 100.
  • the frame structure of NR is more flexible and changeable compared to the frame structure of LTE.
  • the length of each system frame is the same as LTE, which is still 10ms.
  • the system frame number (SFN) ranges from 0 to 1023.
  • the length of each subframe is still 1ms.
  • the subframe number in a system frame is 0. ⁇ 9.
  • Table 3 The relationship between the time slot and the subcarrier spacing in each subframe in 5G NR is shown in Table 3:
  • FIG. 6 is a schematic diagram of a frame structure provided by an embodiment of the present application.
  • the frame structure of NR is more flexible.
  • the configuration of DL and UL in NR can be at the symbol level. They are downlink symbol D, uplink symbol U, and flexible symbol X (which can be used for downlink Transmission, uplink transmission, gap (GAP) or as a reserved resource).
  • the time slot types in the NR are composed of the four structures shown in FIG. 7.
  • FIG. 7 is a schematic diagram of the time slot types provided in an embodiment of the present application:
  • FIG. 7 is only an example for explaining different time slot types in NR, and does not constitute any limitation to the application.
  • the specific 5G NR time slot configuration scheme can be divided into four layers:
  • the first layer Cell-based radio resource control (Radio Resource Control, RRC) signaling semi-static configuration, which is determined by the uplink-downlink common configuration (UL-DL-configuration-common) in the system information block (system information block 1, SIB1) ) Information and UL-DL-configuration-common-Set2 (UL-DL-configuration-common-Set2) information carrying, the frame structure period is ⁇ 0.5, 0.625, 1, 1.25, 2, 2.5, 5, 10 ⁇ ms, and the subcarrier The interval is independent.
  • RRC Radio Resource Control
  • the second layer semi-static configuration based on UE-based RRC signaling, carried by high-level signaling uplink-downlink dedicated configuration (UL-DL-configuration-dedicated), and the frame structure period is ⁇ 0.5, 0.625, 1, 1.25, 2, 2.5 , 5, 10 ⁇ ms, independent of sub-carrier spacing.
  • the third layer terminal equipment group slot format indication (user equipment group slot format information, UE-group SFI) signaling is dynamically configured, carried by the downlink control information format 2_0 (downlink control information format 2_0, DCI format 2_0), and the frame structure period It is ⁇ 1, 2, 4, 5, 8, 10, 20 ⁇ slots, independent of the subcarrier spacing.
  • UE-group SFI user equipment group slot format information
  • the fourth layer terminal equipment dedicated time slot format indication (user equipment specific downlink control information, UE-specific DCI) signaling dynamic configuration, carried by DCI format 0, 1.
  • terminal equipment dedicated time slot format indication user equipment specific downlink control information, UE-specific DCI
  • the transmission status of each symbol contained in the time slot is any one of the following:
  • the three states of uplink transmission (uplink, UL) state, downlink transmission (downlink, DL) state, and unknown state can be denoted as UL/DL/X (or U/D/X for short).
  • X is called an unknown state or a flexible state, and the terminal device neither receives nor sends information on the symbol corresponding to the X state.
  • X can also be called F or U.
  • slot format_0 means that the transmission status of 14 symbols in a slot is all downlink transmission status
  • slot format_1 means that the transmission status of 14 symbols in a slot is all uplink transmission Status
  • Slot format_2 refers to the transmission status of the 14 symbols contained in a time slot are neither uplink nor uplink transmission status, etc.
  • V-UE vehicle user equipment
  • V-UE vehicle user equipment
  • LTE V2X communication solves some basic requirements in V2X scenarios, but for future application scenarios such as fully intelligent driving and autonomous driving, the current LTE V2X communication cannot effectively support.
  • V2X in the 5G NR system will also be further developed, for example, it can support lower transmission delay and more reliable Communication transmission, higher throughput, and better user experience to meet the needs of a wider range of application scenarios.
  • 5G NR mode 1 and 5G NR mode 2 correspond to the aforementioned LTE mode 3 and LTE mode 4 respectively.
  • FIG. 8 is a schematic flowchart of a communication method provided by an embodiment of the present application. From the perspective of interaction, the possible flow of the communication method provided by the embodiment of the present application is described, including: the first terminal device and the network device, and steps S110-S140.
  • the method flow shown in FIG. 8 includes S111, and the first terminal device determines the periodic data to be sent.
  • the first terminal device determines that the periodic data to be sent may be understood as the periodic data to be sent arriving at the physical layer or other transmission layers of the first terminal device.
  • the periodic data involved in this application refers to the data of certain services that arrive at the terminal equipment periodically, that is to say, the terminal equipment can determine the need to transmit the periodicity in the future based on the periodic characteristics of the data.
  • the time unit of sexual data It should be noted that the focus of the periodic data involved in the embodiments of this application is that the transmission characteristics of the data are periodic, and it does not limit whether the data itself changes, for example, the data transmitted in the first cycle and The content of the data transmitted in the second cycle can be different.
  • the following steps are performed. It should be understood that when determining the time-frequency resource for transmitting the periodic data in this application, it mainly involves determining the time-domain position of the time-frequency resource, and does not involve It is an improvement to determine the frequency domain position of the time-frequency resource. In the 5G NR scenario, the time domain position is usually determined by the time unit.
  • the time unit involved in this application can be a symbol or a time slot in 5G NR (as in the preceding As shown in Table 3, different subcarrier intervals correspond to different symbols or time slots), which means that when determining a certain time unit for sending periodic data in the following, it should be understood that the time unit is the time domain position
  • the time-frequency resources are used to transmit periodic data.
  • the first terminal device determines a first time unit set.
  • the first time unit set includes a time unit specified by the protocol that can be used by the first terminal device to transmit periodic data in a system frame.
  • the periodic data involved in the embodiments of the present application includes at least one of side-link service data, side-link control information, and side-link feedback information, where the side-link service data is also It can be called sending physical layer side link data channel PSSCH and side link control information. It can also be called sending physical layer side link control channel (PSCCH) and side link feedback information. It is called the physical sidelink feedback channel (PSFCH) of the sending physical layer.
  • PSSCH is used instead when periodic data is involved.
  • the PSSCH transmitted by the first terminal device can be described in various ways, and this application is not limited thereto.
  • time unit in the first time unit set is a symbol
  • time unit in the first time unit set is a time slot
  • 10240 represents the total number of subframes in a system frame
  • N slot represents the number of slots in each subframe under different subcarrier intervals.
  • the first time unit set involved in this application can be any of the following time unit sets:
  • the time unit configured for SLSS transmission and the time unit configured for cell-specific SRS transmission in the system frame are excluded. If it is a TDD carrier, the TTD mode is further excluded Downlink time unit and special time unit below;
  • the time unit configured for SLSS transmission the time unit configured for cell-specific SRS transmission, and the time unit configured for PRACH transmission in the system frame are excluded. If it is a TDD carrier, further exclude the downlink time unit and special time unit in TTD mode;
  • the time unit configured for SLSS transmission the time unit configured for cell-specific SRS transmission and the time unit reserved for PUSCH in the system frame are excluded, if For TDD carrier, the downlink time unit and special time unit in TTD mode are further excluded;
  • the time unit configured for SLSS transmission excludes the time unit configured for cell-specific SRS transmission, the time unit configured for PRACH transmission in the system frame, and If the time unit reserved for PUSCH is a TDD carrier, the downlink time unit and special time unit in the TTD mode are further excluded.
  • the first time unit set involved in this application may be a time unit set defined by an existing protocol that can be used to transmit the PSSCH, or it may be a set of time units defined by a future protocol that can be used for PSSCH transmission in the development process of communication technology. This application is not strictly limited, and the first time unit set will not be repeated here.
  • the above-mentioned first time unit set includes multiple time units, and the multiple time units are serially numbered in a time sequence, that is, each time unit in the multiple time units has a corresponding number.
  • the number of each time unit can be understood as the order of the time unit in the first time unit set.
  • the multiple time units in the first time unit set are numbered consecutively in chronological order starting from the number 0, then the ascending sorting is as follows: Then multiple time units in the first time unit set can be called the 0th time unit, the first time unit..., the max time unit, where the value of max is the total number of time units in the first time unit set The value obtained by subtracting 1 from the number;
  • the multiple time units in the first time unit set are numbered consecutively in chronological order starting from the number 1, then the ascending sorting is as follows: Then multiple time units in the first time unit set can be called the first time unit, the second time unit..., the max+1th time unit;
  • the multiple time units in the first time unit set are numbered consecutively in chronological order starting from the number X, then after sorting in ascending order: Then the multiple time units in the first time unit set can be called the Xth time unit, the X+1th time unit..., the max+Xth time unit, and X is a positive integer.
  • the number of multiple time units in the first time unit set starting from a certain number is not limited in chronological order, and it is only limited to the multiple time units in the first time unit set according to The numbers are sorted from small to large. Below, in order to facilitate understanding, a specific example is used to explain how to sort according to the number size:
  • the first time unit set includes 10 time units (SL#1 ⁇ SL#10), and these 10 time units are sorted starting from the number 0, and numbered in sequence with the tolerance of the arithmetic sequence of 1, then 10 The numbers of time units are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. Finally, the 10 time units are sorted according to the size of the number: SL#1, SL#2, SL#3, SL#4, SL#5, SL#6, SL#7, SL#8, SL#9 , SL#10.
  • the first terminal device determines a first time unit.
  • the first terminal device determines the first time unit in the first time unit set determined in S110, where the first time unit is used to send the PSSCH.
  • the first terminal device determines to transmit the PSSCH using the first time-frequency resource whose time domain position is the first time unit at the start time of the first time unit or before the start time of the first time unit.
  • this application provides two solutions for the first terminal device to determine the first time unit:
  • the first terminal device Before the first terminal device determines the first time unit in the first time unit set, it receives semi-persistent scheduling SPS information from the network device, and the SPS information indicates that the first time unit in the first time unit set is used to send the PSSCH.
  • the first terminal device receives SPS information from the network device at the start time of the first time unit or before the start time of the first time unit, and the SPS information indicates that the time domain location is the first time unit.
  • the first time-frequency resource is allocated to the first terminal device, so that the first terminal device uses the first time-frequency resource to transmit the PSSCH.
  • the method shown in FIG. 8 further includes S121, the network device sends SPS information to the first terminal device; and S123, the network device determines the SPS information.
  • S121 the network device sends SPS information to the first terminal device
  • S123 the network device determines the SPS information.
  • the network device determines that the first time-frequency resource can be allocated to the first terminal device according to the load situation, and the time-domain position of the first time-frequency resource corresponds to the above-mentioned first time unit, and the first terminal device may be using the first terminal device.
  • Time-frequency resources transmit PSSCH.
  • the network device sends the SPS information to the first terminal device.
  • the SPS information indicates that the first terminal device passes the The first time-frequency resource whose first time unit is a time-domain position is used to send the PSSCH.
  • the method shown in FIG. 8 further includes S122, where the first terminal device performs time unit elimination.
  • the first terminal device determines the reserved time unit of the historical periodic data sent in the third time unit set.
  • the historical periodic data refers to the data received by the terminal device before the PSSCH reaches, and the data is also periodic;
  • the reservation time unit of the historical periodic data refers to the first terminal device at the third time
  • the first terminal device should determine on which time units the historical periodic data may be sent. Which time units are the reserved time units of the historical periodic data.
  • the first terminal device determines at least one time unit reserved by the historical periodic data in the fourth time unit set. Specifically, when at least one time unit in the reserved time unit of the historical periodic data is located in the foregoing fourth time unit set, the first terminal device should determine the at least one time unit from the fourth time unit set, The at least one time unit is referred to as at least one time unit reserved for historical periodic data. Finally, the first terminal device excludes the time unit in the fourth time unit set that meets the preset time relationship with at least one time unit reserved for historical periodic data, and determines the above from the remaining time units in the fourth time unit set The first time unit.
  • the PSSCH arrives at a third time unit
  • the third time unit set includes P time units before the third time unit, the P is a positive integer
  • the third time unit set is the A subset of a first time unit set
  • the fourth time unit set is a subset of the first time unit set
  • a start time unit in the fourth time unit set is later than the third time unit
  • the P time units are consecutively numbered from n'-P to n'-1; the n'includes: when the third time unit is a time unit in the first time unit set, the n'is The number of the third time unit in the first time unit set; or, when the third time unit is not a time unit in the first time unit set, the n'is the third time unit After the time unit, the first one belongs to the number of the time unit in the first time unit set.
  • the P N ⁇ S symbol time units are consecutively numbered from n'-P N ⁇ S symbol to n'-1, where the specific value of P N may be configured by the network device to the first terminal device through high-level signaling, It may also be pre-defined by the agreement, which is not limited in this application.
  • the third time unit set includes 100 ⁇ S symbol time units before the third time unit, where the number of the 100 ⁇ S symbol time units ranges from n'-100 ⁇ S symbol to n'-1 order.
  • P is pre-configured or configured by high-level signaling.
  • the above-mentioned third time unit is a time unit in a total time unit set in a system frame, and the time units in the total time unit set in the system frame are numbered in chronological order.
  • the number is n.
  • the total number of time units in the total time unit set in a system frame is 10240*14*W
  • W is each subframe corresponding to the preset subcarrier interval
  • the number of time slots within; when the time unit in this application is a time slot, the total number of time units in the total time unit set in a system frame is 10240*W, where W corresponds to the preset subcarrier interval
  • the number of time slots in each subframe is a time unit in a total time unit set in a system frame.
  • the 10240*14*W or 10240*W time units are numbered in chronological order. It is assumed that the third time unit is a time unit numbered 10 in the total time unit set in a system frame. Specifically, the above-mentioned first time unit set is a time unit set obtained by excluding some time units from the total time unit set in a system frame, and the remaining time units are numbered in chronological order.
  • the total time unit set in a system frame is excluded
  • the time units numbered 0-5 out of the time units numbered 0-10 in the total time unit set in a system frame are excluded, then when When the three time units are the time units in the first time unit set, the number of the third time unit in the first time unit set is 4.
  • the foregoing fourth time unit set may be similar to the subframe selection time window shown in FIG. 5.
  • the fourth time unit set may be a time unit set composed of time units in the first time unit set in a system frame window [n+T 1 ,n+T 2 ], where T 1 ⁇ 4, 20 ⁇ T 2 ⁇ 100, and n is the number n of the third time unit.
  • the value range of T 1 and T 2 and the specific value are pre-configured, or the value range of T 1 and T 2 and the specific value are configured by higher layer signaling, which is not included in this application. not limited.
  • selecting the first time unit from the remaining time units in the fourth time unit set may be arbitrarily selecting an available time unit from the remaining time units as the first time unit; or, calculating the remaining time unit
  • Each time unit is the average value of the time-frequency resource energy of the time-domain location, and the corresponding time unit of the time-frequency resource with a smaller average energy is selected as the first time unit.
  • the first terminal device excluding time units in the fourth time unit set that are not available for PSSCH transmission includes:
  • the first terminal device determines the first historical periodic data sent by the first terminal device on the fourth time unit in the third time unit set; the first terminal device determines the data in the fourth time unit set At least one time unit reserved for the first historical periodic data.
  • the first terminal device detects whether the time unit in the third time unit set before the arrival of the PSSCH has a time unit for sending the first historical periodic data (non-periodical PSSCH) sent by the first terminal device, then It can be inferred whether at least one time unit among the time units reserved by the historical periodic data is included in the fourth time unit set. If at least one time unit is included in the fourth time unit set, then the fourth time unit set The time unit in which satisfies the first preset time relationship with the at least one time unit should be excluded.
  • the first preset time relationship is that there is a natural number j such that:
  • y+j ⁇ [S symbol ⁇ P rsvp_TX /N symbol ] z+q ⁇ [S symbol ⁇ P′′ rsvp_TX /N symbol ], where z+q ⁇ [S symbol ⁇ P′′ rsvp_TX /N symbol ] means The position of at least one time unit reserved by the first historical periodic data in the fourth time unit set, z is the number of the fourth time unit, q is a positive integer less than or equal to Q 1 , and y is and At least one time unit reserved by the first historical periodic data is a number of a time unit that meets the first preset time relationship, j is a natural number less than or equal to C resel -1, and C resel is the number of PSSCH reservations, N symbol represents the total number of time units in a frame structure period, S symbol represents the number of time units available for sidelink communication transmission in a frame structure period, P rsvp_TX represents the reservation period of the periodic data, the The unit of the
  • the time unit numbered y is the time unit in the fourth time unit set that cannot be used to transmit PSSCH, and it is understood that the time-frequency resource R x,y corresponding to the time unit numbered y cannot be used to transmit PSSCH, in R x,y
  • the y represents the number of the time unit.
  • R x,y is a piece of time-frequency resource
  • the time-frequency resource is a time unit numbered y in the time domain
  • in the frequency domain is a continuous time-frequency resource starting from x and having a length of L.
  • the value of L is known to the first terminal device.
  • the first terminal device has known available time-frequency resources for a total of 20 sub-channels.
  • the 20 sub-channels are numbered starting from 0 and are numbered until 19, and the first terminal device knows that L is 2, then the 20 sub-channels can be Divided into 19 time-frequency resource blocks, each time-frequency resource block is composed of 2 sub-channels, and the sub-channels can be understood as a unit of the number of time-frequency resources.
  • the first terminal device excluding the time units in the fourth time unit set that are not available for PSSCH transmission further includes:
  • the first terminal device listens to the side link control information SCI from the second terminal device, where the SCI is used to indicate the second historical periodic data of the second terminal device; the second terminal device is not special Refers to a certain terminal device, which can refer to one or more other terminal devices other than the above-mentioned first terminal device, and it can be understood that the above-mentioned first terminal device can listen to at least one other terminal device in the above-mentioned third terminal device. Whether the second historical periodic data has been sent on the time unit set, and whether the reserved time unit of the second historical periodic data is included in the foregoing fourth time unit set.
  • the first terminal device decodes the SCI to obtain the reservation period P rsvp_RX and priority prio RX of the second historical periodic PSSCH.
  • P rsvp_RX and prio RX are used to determine the thresholds Th prioTX, prioRX , the second terminal
  • the device is a terminal device other than the first terminal device;
  • the terminal device determines that the measurement result of the reference signal received power RSRP of the second historical periodic data on the fifth time unit in the third time unit set is greater than the Th prioTX, prioRX , the first terminal device Determine at least one time unit reserved for the second historical periodic data sent by the second terminal device in the fourth time unit set. It is understood that the time-frequency resource R x,y' corresponding to the time unit numbered y'cannot be used to transmit the PSSCH, and the x is used to indicate the frequency domain position of R x,y' .
  • the first terminal device detects whether the time unit in the third time unit set before the arrival of the periodic PSSCH has a time unit for the second historical periodic data sent by another terminal device, then it can be inferred that the time unit sent by the other terminal device Whether at least one time unit in the time unit reserved by the second historical periodic data is included in the fourth time unit set, if the at least one time unit is included in the fourth time unit set, then the fourth time The time unit that satisfies the second preset time relationship with the at least one time unit in the unit set should be excluded.
  • the second preset time relationship is that there is a natural number j such that:
  • y'+j ⁇ [S symbol ⁇ P rsvp_TX /N symbol ] z'+q ⁇ [S symbol ⁇ P rsvp_RX /N symbol ], where z'+q ⁇ [S symbol ⁇ P rsvp_RX /N symbol ] means historical data of the second periodic number of the at least one reservation time unit, z 'is a number in the fifth time unit, q is a positive integer less than or equal to Q 2, y' is the second data and the history of periodic At least one reserved time unit is the number of a time unit that meets the second preset time relationship, j is a natural number less than or equal to C resel -1, C resel is the number of PSSCH reservations, and S symbol represents a frame structure period The number of time units available for side-link communication transmission, N symbol represents the total number of time units in a frame structure period, P rsvp_TX represents the periodic data reservation period, and the periodic data reservation period unit Is a
  • the time-frequency resource R x,y' corresponding to the time unit numbered y'cannot be used to transmit the PSSCH, and y'in R x, y' represents the number of the time unit.
  • R x, y' is a block of time-frequency resources
  • the time-frequency resource is a time unit numbered y'in the time domain, and is a continuous time-frequency resource with a length of L starting from x in the frequency domain.
  • the above threshold value Th prioTX needs to be adjusted.
  • time unit The first terminal device continuously monitors the third time unit set Except for the time units in which the first terminal device itself has sent data, the reservation status of these time units is determined, and the time units are excluded according to the reservation status.
  • S symbol represents the number of time units available for sidelink transmission in a single frame structure period under this frame structure configuration.
  • j is a natural number less than or equal to C resel -1
  • C resel represents the preset number of PSSCH reservations, which is a constant.
  • P rsvp_TX represents the reservation period of the periodic data
  • the unit of the reservation period of the periodic data is a time unit.
  • P" rsvp_TX represents the time unit
  • the first terminal device obtains the SCI of other terminal devices, decodes the SCI, determines P rsvp_RX and prio RX of PSSCH transmitted by other terminal devices, and determines the thresholds Th prioTX, prioRX according to P rsvp_RX and prio RX .
  • P rsvp_TX indicates that the PSSCH reservation period unit is a time unit, and the unit is a time unit.
  • N symbol represents the total number of time units in a single frame structure period under a certain frame structure configuration
  • S symbol represents the number of time units available for sidelink transmission in a single frame structure period under this frame structure configuration.
  • j is a natural number less than or equal to C resel -1
  • C resel represents the number of PSSCH reservations, which is a constant.
  • q 1, 2 , 3..., Q 2 .
  • the first terminal device After the first terminal device determines that the first time unit in the first time unit set is used to transmit the PSSCH, since the PSSCH to be transmitted by the first terminal device is periodic, for periodic PSSCH transmission, the first time unit can be determined
  • the second time unit set after the first time unit in the set is used to transmit the PSSCH that is, S130 is executed, the first terminal device determines the second time unit set, and each time unit in the second time unit set is used to transmit the PSSCH.
  • the first terminal device determines a second time unit set in the first time unit set according to the first time domain interval and the number of reservations N, and the time units in the second time unit set are used to send the PSSCH, wherein the second time unit set includes N-1 time units, and the time domain interval between the first time unit in the second time unit set and the first time unit is the first time unit A time domain interval, and the time domain interval between any two adjacent time units in the second time unit set is the first time domain interval, and the time domain interval of the time unit in the second time unit set The number is greater than the number of the first time unit.
  • the time domain interval relationship satisfied between the time unit in the second time unit set and the first time unit includes the following two possibilities:
  • the first terminal device receives semi-persistent scheduling SPS information from the network device, the SPS information indicates that the first time unit in the first time unit set is used to send the periodic data, and the SPS information includes SPS P SPS , the P SPS is used to determine the first time domain interval, where the first time domain interval P'SPS is expressed as a time unit available for sidelink communication transmission in a frame structure period The product of the number S symbol and the number of system frames contained in the period P SPS of the SPS ;
  • the time domain interval between the Mth time unit and the first time unit in the second time unit set is M of the first time domain intervals, where M is less than or equal to N-1 Positive integer.
  • time domain interval between the M-th time unit in the second time unit set and the first time unit is M ⁇ P' SPS .
  • time domain interval between the first time unit in the second time unit set and the first time unit is P′ SPS .
  • the number of the first time unit is m, where m is a natural number
  • the relationship between the number of the M-th time unit in the second time unit set and the number m of the first time unit is m+M ⁇ P' SPS , 0 ⁇ m+M ⁇ P' SPS ⁇ max, M is Less than or equal to N-1 positive integer.
  • FIG. 9 is a schematic diagram of a frame structure provided by an embodiment of the present application.
  • the period length of the frame structure is 0.5ms, and two subframes in the system frame are selected as an example for description. Since the frame structure in the system frame is periodic, it is not shown.
  • the output subframes are similar to the two subframes shown in FIG. 9.
  • the first time unit is the 0th time unit in the first time unit set, according to the numbers of the time units in the first time unit and the second time unit set above
  • the number of the unit is 14, which is the 14th time unit in the first time unit set
  • the number of the second time unit in the second time unit set is 28, which is the 28th time unit in the first time unit set .
  • the first time unit set shown in Figure 9 only includes 28 time units, numbered from 0 to 27. Therefore, in the part of the system frame shown in Figure 9, the second time unit set is the first time unit set.
  • the 14th time unit numbered 14.
  • FIG. 9 is only an example, and two subframes in the system frame are taken as an example for description. In fact, there may be multiple subframes. I won't repeat it here.
  • the time domain interval between the M-th time unit and the first time unit in the second time unit set is M ⁇ P' rsvp_TX , where M is a positive integer less than or equal to N-1, and the reservation The number N is the number of PSSCH reservations.
  • the time domain interval between the first time unit in the second time unit set and the first time unit is P'rsvp_TX .
  • the number of the first time unit is m, where m is a natural number
  • the relationship between the number of the j-th time unit in the second time unit set and the number m of the first time unit is m+M ⁇ P' rsvp_TX , 0 ⁇ m +M ⁇ P' SPS ⁇ max, M is A natural number less than or equal to C resel -1, and C resel is the preset number of PSSCH reservations, which is a constant.
  • the PSSCH reservation period indicates the interval between the first terminal device to transmit the PSSCH twice
  • the preset PSSCH reservation number indicates the number of times the first terminal device reserves the PSSCH that needs to be periodically transmitted.
  • FIG. 9 is a schematic diagram of a frame structure provided by an embodiment of the present application.
  • the frame structure period length is 0.5 ms
  • two subframes in the system frame are selected as an example for description. Since the frame structure in the system frame is periodic, it is not shown
  • the subframes are similar to the two subframes shown in FIG. 9.
  • the first time unit is the 0th time unit in the first time unit set, according to the numbers of the time units in the first time unit and the second time unit set above
  • the number of is 7, which is the 7th time unit in the first time unit set, and the number of the second time unit in the second time unit set is 14, which is the 14th time unit in the first time unit set .
  • the first terminal device may send the PSSCH on the time unit in the first time unit and the second time unit set. That is, S140 is executed to transmit the PSSCH. It should be understood that the transmission of the PSSCH on the time units in the first time unit and the second time unit set shown in this application refers to the time domain position of the time unit in the first time unit and the second time unit set. PSSCH is sent on time-frequency resources.
  • FIG. 11 is a schematic diagram of the communication device 10 proposed in the present application.
  • the apparatus 10 includes a sending unit 110 and a processing unit 120.
  • the communication device 10 may be the first terminal device in the foregoing method embodiment or a chip or functional module inside the first terminal device.
  • the sending unit 110 is configured to send the periodic data on a time unit in the first time unit and the second time unit set.
  • the processing unit 120 is configured to determine a first time unit set, and the time units in the first time unit set can be used to transmit at least one of side link service data, side link control information, and side link feedback information One type, wherein the first time unit set includes multiple time units, and the multiple time units are numbered consecutively in a time sequence
  • the processing unit 120 is further configured to determine periodic data to be sent, where the periodic data includes at least one of the side link service data, the side link control information, and the side link feedback information One kind
  • the processing unit 120 is further configured to determine a first time unit in the first time unit set, where the first time unit is used to send the periodic data, according to the first time domain interval and the number of reservations N
  • a second time unit set is determined in the first time unit set, and the time unit in the second time unit set is used to send the periodic data, wherein the second time unit set includes N-1 time units ,
  • the time domain interval between the first time unit in the second time unit set and the first time unit is the first time domain interval, and any adjacent time unit in the second time unit set
  • the time domain interval between the two time units is the first time domain interval, and the number of the time unit in the second time unit set is greater than the number of the first time unit.
  • the device 10 is completely corresponding to the first terminal device in the method embodiment, and the corresponding unit of the device 10 is used to execute the corresponding steps executed by the first terminal device in the method embodiment shown in FIG. 8.
  • the sending unit 110 in the device 10 executes the sending steps in the method embodiment.
  • S140 in FIG. 8 is executed, and periodic data is sent on a time unit in the first time unit and the second time unit set.
  • the processing unit 120 executes steps implemented or processed internally by the first terminal device in the method embodiment. For example, execute S110 in FIG. 8, determine the first time unit set, execute S111 in FIG. 8, determine the periodic data to be sent, execute S120 in FIG. 8, determine the first time unit, and execute S130 in FIG. , Determine the second time unit set.
  • the apparatus 10 may further include a receiving unit 130, configured to receive information sent by other devices.
  • a receiving unit 130 configured to receive information sent by other devices.
  • the sending unit 110 and the receiving unit 130 may constitute a transceiver unit, and have both receiving and sending functions.
  • the processing unit 120 may be a processor.
  • the transmitting unit 110 may be a receiver.
  • the receiving unit 130 may be a transmitter. The receiver and transmitter can be integrated to form a transceiver.
  • the sending unit 110 and the receiving unit 130 may be antennas and input/output devices of the terminal device, and the processing unit 120 may be a processor of the terminal device;
  • the sending unit 110 and the receiving unit 110 may be input and output circuits on the chip, and the processing unit 120 may be a processor on the chip; the device 10 is the above
  • the sending unit 110 may be a sending function module
  • the receiving unit 110 may be a receiving function module
  • the processing unit 120 may be a processing function module.
  • FIG. 12 is a schematic structural diagram of a first terminal device 20 applicable to an embodiment of the present application.
  • the first terminal device 20 can be applied to the system shown in FIG. 1.
  • FIG. 12 only shows the main components of the first terminal device.
  • the first terminal device 20 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is used to control the antenna and the input and output devices to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory to execute the corresponding process executed by the first terminal device in the communication method proposed in this application And/or operation. I won't repeat them here.
  • FIG. 12 only shows a memory and a processor. In the actual first terminal device, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.
  • FIG. 13 is a schematic diagram of the communication device 30 proposed in the present application.
  • the device 30 includes a sending unit 310 and a processing unit 320.
  • the communication device 30 may be the network device in the foregoing method embodiment or a chip or functional module inside the network device.
  • the processing unit 320 is configured to determine semi-persistent scheduling SPS information, where the SPS information is used to indicate that the first terminal device can send periodic data through the first time unit in the first time unit set,
  • P'SPS [S symbol ⁇ P SPS /N symbol ]
  • N symbol represents a preset frame structure configuration
  • the The time unit in the first time unit set can be used to transmit at least one of side link service data, side link control information, and side link feedback information, and the first time unit set includes multiple times Unit, the multiple time units are consecutively numbered in chronological order,
  • the first time domain interval and the number of reservations N are used to determine a second time unit set in the first time unit set, and time units in the second time unit set are used for the first terminal device to send
  • the second time unit set includes N-1 time units, and the time domain interval between the first time unit in the second time unit set and the first time unit is The first time domain interval, and the time domain interval between any two adjacent time units in the second time unit set is the first time domain interval, and the time in the second time unit set
  • the number of the unit is greater than the number of the first time unit;
  • the sending unit 310 is configured to send SPS information to the first terminal device.
  • the device 30 completely corresponds to the network device in the method embodiment, and the corresponding unit of the device 30 is used to execute the corresponding steps executed by the network device in the method embodiment shown in FIG. 8.
  • the sending unit 310 in the apparatus 30 executes the steps of the network device sending in the method embodiment. For example, step 121 of sending SPS information to the first terminal device in FIG. 8 is performed.
  • the processing unit 120 executes the steps implemented or processed inside the network device in the method embodiment. For example, step 123 of determining SPS information in FIG. 8 is performed.
  • the apparatus 30 may further include a receiving unit 330, configured to receive information sent by other devices.
  • the receiving unit 330 and the sending unit 310 may constitute a transceiver unit, and have both receiving and sending functions.
  • the processing unit 320 may be a processor.
  • the transmitting unit 310 may be a receiver.
  • the receiving unit 330 may be a transmitter. The receiver and transmitter can be integrated to form a transceiver.
  • the sending unit 310 and the receiving unit 330 may be remote radio units (RRU) of the network device, and the processing unit 320 may be a network device.
  • the baseband unit (BBU) of the device when the device 30 is the chip in the network device in the foregoing method embodiment, the sending unit 310 and the receiving unit 330 may be input and output circuits and processing units 320 on the chip. It may be a processor on a chip; when the apparatus 30 is a functional module in a network device in the above method embodiment, the sending unit 310 may be a sending function module, the receiving unit 330 may be a receiving function module, and the processing unit 320 may It is a processing function module.
  • FIG. 14 is a schematic structural diagram of a network device 40 applicable to an embodiment of the present application, which can be used to implement the functions of the network device in the above-mentioned communication method.
  • a network device 40 can be a schematic diagram of the structure of the base station.
  • the network device can be applied to the system shown in Figure 1.
  • the network device 40 may include one or more radio frequency units, such as an RRU 401 and one or more BBUs.
  • the baseband unit may also be referred to as a digital unit (DU) 402.
  • the RRU 401 may be called a transceiver unit, and corresponds to the sending unit 310 in FIG. 13.
  • the transceiver unit 401 may also be called a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 4011 and a radio frequency unit 4012.
  • the transceiving unit 401 may include a receiving unit and a transmitting unit, the receiving unit may correspond to a receiver (or receiver, receiving circuit), and the transmitting unit may correspond to a transmitter (or transmitter, transmitting circuit).
  • the RRU 401 part is mainly used for receiving and sending radio frequency signals and converting radio frequency signals and baseband signals, for example, for sending the control information described in the foregoing embodiment to the first terminal device.
  • the part 402 of the BBU is mainly used for baseband processing and control of the base station.
  • the RRU 401 and the BBU 402 may be physically set together, or may be physically separated, that is, a distributed base station.
  • the BBU 402 is the control center of the network equipment, and may also be called a processing unit, which may correspond to the processing unit 320 in FIG. 13, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading.
  • the BBU (processing unit) 402 may be used to control the network device 40 to execute the operation procedure of the network device in the foregoing method embodiment, for example, to determine the length of the time unit that carries the control information of the first terminal device.
  • the BBU 402 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network of a single access standard (for example, an LTE system, or a 5G system), or may separately support Wireless access networks of different access standards.
  • the BBU 402 also includes a memory 4021 and a processor 4022.
  • the memory 4021 is used to store necessary instructions and data.
  • the memory 4021 stores the codebook in the above-mentioned embodiment and the like.
  • the processor 4022 is used to control the base station to perform necessary actions, for example, to control the base station to execute the operation procedure of the network device in the foregoing method embodiment.
  • the memory 4021 and the processor 4022 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.
  • the network device 40 shown in FIG. 14 can implement the network device functions involved in the method embodiments of FIGS. 8-10.
  • the operations and/or functions of each unit in the network device 40 are respectively for implementing the corresponding process executed by the network device in the method embodiment of the present application. To avoid repetition, detailed description is omitted here.
  • the structure of the network device illustrated in FIG. 14 is only a possible form, and should not constitute any limitation in the embodiment of the present application. This application does not exclude the possibility of other network device structures that may appear in the future.
  • An embodiment of the present application also provides a communication system, which includes the aforementioned network device and one or more first terminal devices.
  • This application also provides a computer-readable storage medium that stores instructions in the computer-readable storage medium.
  • the computer executes the network device in the method shown in FIGS. 8-10. The various steps performed.
  • This application also provides a computer-readable storage medium that stores instructions in the computer-readable storage medium.
  • the computer executes the first method shown in FIGS. 8-10. The various steps performed by the terminal device.
  • This application also provides a computer program product containing instructions.
  • the computer program product runs on a computer, the computer executes the steps performed by the network device in the method shown in FIGS. 8-10.
  • the present application also provides a computer program product containing instructions.
  • the computer program product runs on a computer, the computer executes the steps performed by the first terminal device in the method shown in FIGS. 8-10.
  • This application also provides a chip including a processor.
  • the processor is used to read and run the computer program stored in the memory to execute the corresponding operation and/or process executed by the first terminal device in the communication method provided in this application.
  • the chip further includes a memory, the memory and the processor are connected to the memory through a circuit or a wire, and the processor is used to read and execute the computer program in the memory.
  • the chip further includes a communication interface, and the processor is connected to the communication interface.
  • the communication interface is used to receive data and/or information that needs to be processed, and the processor obtains the data and/or information from the communication interface, and processes the data and/or information.
  • the communication interface can be an input and output interface.
  • the device may be a communication chip or an integrated module containing the communication chip, and includes a processor.
  • the processor is used to call and run the computer program stored in the memory to execute the corresponding operation and/or process executed by the network device in the communication method provided in this application.
  • the chip further includes a memory, the memory and the processor are connected to the memory through a circuit or a wire, and the processor is used to read and execute the computer program in the memory.
  • the chip further includes a communication interface, and the processor is connected to the communication interface.
  • the communication interface is used to receive data and/or information that needs to be processed, and the processor obtains the data and/or information from the communication interface, and processes the data and/or information.
  • the communication interface can be an input and output interface.
  • the processor may be a central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more of them used to control the technology of the application Integrated circuits for program execution, etc.
  • the processor may be a digital signal processor device, a microprocessor device, an analog-to-digital converter, a digital-to-analog converter, etc.
  • the processor can distribute control and signal processing functions of terminal devices or network devices among these devices according to their respective functions.
  • the processor may have a function of operating one or more software programs, and the software programs may be stored in the memory.
  • the functions of the processor can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions.
  • the memory can be read-only memory (ROM), other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions
  • Dynamic storage devices can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM), or other optical disk storage, optical disc storage ( Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can Any other medium accessed by the computer, etc.
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • optical disc storage Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.
  • magnetic disk storage media or other magnetic storage devices or can be used to carry or store desired program codes in the form of instructions or data structures and can Any other medium
  • the memory and the memory involved in the foregoing embodiments may be physically independent units, or the memory may also be integrated with the processor.
  • At least one refers to one or more
  • multiple refers to two or more.
  • And/or describes the association relationship of the associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean the existence of A alone, A and B at the same time, and B alone. Among them, A and B can be singular or plural.
  • the character “/” generally indicates that the associated objects are in an “or” relationship.
  • “The following at least one item” and similar expressions refer to any combination of these items, including any combination of single items or plural items.
  • At least one of a, b, and c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation.
  • multiple units or components can be combined or integrated into another system, or some features can be omitted or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may not be physically separated, and the components displayed as units may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the technical solution of the present application.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

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Abstract

本申请提供了一种通信方法和通信装置。包括:第一终端设备存在待发送的周期性数据,第一终端设备确定可用于传输周期性数据的第一时间单元集合;第一终端设备确定第一时间单元集合中的第一时间单元用于发送周期性数据,并根据第一时域间隔和预约个数N在第一时间单元集合中确定用于发送周期性数据的第二时间单元集合,第二时间单元集合中的第一个时间单元与第一时间单元之间的时域间隔为第一时域间隔,第二时间单元集合中的时间单元的编号大于第一时间单元的编号。本申请提供的技术方案实现在5G NR场景下侧行链路通信的第一终端设备的周期性数据的资源配置,可以应用于车联网,例如V2X、LTE-V、V2V等。

Description

通信方法和通信装置
本申请要求于2019年04月24日提交中国专利局、申请号为201910335535.7、申请名称为“通信方法和通信装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域,并且更具体地,涉及一种通信方法和通信装置。
背景技术
在第三代合作伙伴计划(the 3rd generation partnership project,3GPP)提出的长期演进(long term evolution,LTE)技术的网络下,车与任何事物通信(vehicle to everything,V2X)的车联网技术被提出,V2X通信是指车辆与外界的任何事物的通信。LTE技术的网络下V2X可以简称为LTE V2X。V2X系统中所涉及的终端设备之间进行的通信被广泛称为侧行链路(slidelink,SL)通信。
LTE V2X通信可以支持有网络覆盖和无网络覆盖的通信场景。SL通信资源配置方式可以是LTE系统中的演进型基站(evolved NodeB,eNB或eNodeB)调度模式和终端设备自选模式。随着第五代新无线(5th generation new radio,5G NR)技术在3GPP标准组织中的开发,5G NR技术的网络下V2X也将进一步发展,比如可以支持更低的传输时延,更可靠的通信传输,更高的吞吐量,更好的用户体验,以满足更加广泛的应用场景需求。但是,由于5G NR场景中帧结构的灵活性导致LTE V2X中定义的用于确定周期性数据传输资源的,终端设备自选资源模式和网络设备配置资源的模式在5G NR场景下不再适用,因此如何实现在5G NR场景中确定周期性数据的传输资源成为亟待解决的问题。
发明内容
本申请提供一种通信方法和通信装置,从第一时间单元集合确定用于发送周期性数据第一时间单元,并基于第一时域间隔和预约个数N从第一时间单元集合确定用于发送周期性数据第二时间单元集合,实现在5G NR场景下确定周期性数据的传输资源。
第一方面,提供了一种通信方法,包括:第一终端设备确定第一时间单元集合,所述第一时间单元集合中的时间单元可用于传输侧行链路业务数据、侧行链路控制信息和侧行链路反馈信息中的至少一种,其中,所述第一时间单元集合中包括多个时间单元,所述多个时间单元按照时间顺序连续编号,所述时间单元包括符号或时隙;所述第一终端设备确定待发送的周期性数据,所述周期性数据包括所述侧行链路业务数据、所述侧行链路控制信息和所述侧行链路反馈信息中的至少一种;所述第一终端设备确定所述第一时间单元集合中的第一时间单元,所述第一时间单元用于发送所述周期性数据;所述第一终端设备根据第一时域间隔和预约个数N在所述第一时间单元集合中确定第二时间单元集合,所述第 二时间单元集合中的时间单元用于发送所述周期性数据,其中,所述第二时间单元集合包括N-1个时间单元,所述第二时间单元集合中的第一个时间单元与所述第一时间单元之间的时域间隔为所述第一时域间隔,且所述第二时间单元集合中的任意相邻的两个时间单元之间的时域间隔为所述第一时域间隔,所述第二时间单元集合中的时间单元的编号大于所述第一时间单元的编号;所述第一终端设备在所述第一时间单元和所述第二时间单元集合中的时间单元上发送所述周期性数据。
根据本申请实施例提供的通信方法,第一终端设备在有周期性数据需要发送的时候。首先根据协议规定的确定可用于发送周期性数据的第一时间单元集合,再从第一时间单元集合中确定发送该周期性数据的第一时间单元和第二时间单元集合。其中,第二时间单元集合中的时间单元与第一时间单元之间的时域间隔能够基于第一时域间隔和预约个数N确定,从而本申请实施例提供的通信方法能够在时间单元的粒度下配置第一终端设备能够发送周期性数据的资源,实现在5G NR场景中确定周期性数据的传输资源。
应理解,上述的第一时间单元和第二时间单元集合用于发送周期性数据,指的是第一时间单元和第二时间单元集合中的时间单元所指示的时域位置对应的时频资源用于承载并发送周期性数据,由于本申请中不涉及时频资源频域位置的确定,只涉及时域位置的确定,所以简述为第一时间单元和第二时间单元集合用于发送周期性数据。
还应理解,本申请所涉及的发送周期性数据包括以下任意一种可能:
发送侧行链路业务数据(也可以称为发送物理层侧行链路数据信道PSSCH);
发送侧行链路控制信息(也可以称为发送物理层侧行链路控制信道PSCCH);
发送侧行链路反馈信息(也可以称为发送物理层侧行链路反馈信道PSFCH);
发送侧行链路业务数据和侧行链路控制信息;
发送侧行链路业务数据和侧行链路反馈信息;
发送侧行链路控制信息和侧行链路反馈信息;
发送侧行链路业务数据、侧行链路控制信息以及侧行链路反馈信息。
还应理解,上述的第一时间单元集合中包括的可用于传输侧行链路业务数据、侧行链路控制信息和侧行链路反馈信息中的至少一种指的是:
第一时间单元集合中包括系统帧内的所有时间单元中除用于发送侧行链路通信同步信号SLSS的时间单元之外的时间单元;或者。
若上述的第一终端设备工作在时分双工TDD模式下,第一时间单元集合中包括系统帧内的所有时间单元中除用于发送侧行链路通信同步信号SLSS的时间单元、TDD模式下的下行时间单元和特殊时间单元之外的时间单元;或者,
若系统帧内包括预留时间单元,第一时间单元集合中包括系统帧内的所有时间单元中除用于发送侧行链路通信同步信号SLSS的时间单元、预留时间单元之外的时间单元;或者,
若上述的第一终端设备工作在时分双工TDD模式下,且系统帧内包括预留时间单元,第一时间单元集合中包括系统帧内的所有时间单元中除用于发送侧行链路通信同步信号SLSS的时间单元、TDD模式下的下行时间单元和特殊时间单元以及预留时间单元之外的时间单元。
具体地,由于5G NR场景下,不同的子载波间隔对应不同的帧结构,也就是说不同 的子载波间隔对应着不同的上述的第一时间单元集合。
还应理解,上述的第一终端设备并不是特指某一个终端设备。
结合第一方面,在第一方面的某些实现方式中,所述第一终端设备确定所述第一时间单元集合中的第一时间单元之前,所述通信方法还包括:所述第一终端设备从网络设备接收半静态调度SPS信息,所述SPS信息指示所述第一时间单元集合中的第一时间单元用于发送所述周期性数据,其中,所述SPS信息中包括SPS的周期P SPS,所述P SPS用于确定所述第一时域间隔。具体地,第一时域间隔P’ SPS表示为一个帧结构周期内可用于侧行链路通信传输的时间单元数S symbol与所述SPS的周期P SPS内包含的系统帧数的乘积并取整的结果;所述第二时间单元集合中第M个时间单元与所述第一时间单元之间的时域间隔为M个所述第一时域间隔,其中,所述M为小于或者等于N-1的正整数。
根据本申请实施例提供的通信方法,第一终端设备可以根据网络设备发送的SPS信息,获知在第一时间单元集合中的第一时间单元上发送周期性数据。并且,由于网络设备发送的SPS信息中携带有SPS的周期,第一终端设备能够基于该SPS的周期和自身已知的SPS的周期P SPS内包含的系统帧数和S symbol进一步地去确定第一时间单元集合中发送周期性数据的第二时间单元集合。
应理解,上述的N为预定义的一个值。可选地,该值的大小可以与上述的第一时域间隔的值大小相等。
结合第一方面,在第一方面的某些实现方式中,所述周期P SPS内包含的系统帧数表示为所述周期P SPS与所述一个帧结构周期内的总的时间单元数N symbol的比值,则所述第一时域间隔P’ SPS表示为P’ SPS=[S symbol×P SPS/N symbol],[]表示向下或向上取整运算。
根据本申请实施例提供的通信方法,第一时域间隔可以用表达式P’ SPS=[S symbol×P SPS/N symbol]进行表示,那么第一时间单元与第二时间单元集合中的第M个时间单元之间的时域间隔可以用表达式M×P’ SPS进行表示。
结合第一方面,在第一方面的某些实现方式中,所述第一终端设备确定所述第一时间单元集合中的第一时间单元包括:所述第一终端设备确定第三时间单元集合内发送的历史周期性数据;所述第一终端设备确定第四时间单元集合内所述历史周期性数据预约的至少一个时间单元;所述第一终端设备从剩余的时间单元中确定所述第一时间单元,其中,所述剩余的时间单元为所述第四时间单元集合中排除与所述历史周期性数据预约的至少一个时间单元满足预设时间关系的时间单元之后剩余的时间单元,其中,所述周期性数据在第三时间单元到达,所述第三时间单元集合包括所述第三时间单元之前的P个时间单元,所述P为正整数,所述第三时间单元集合为所述第一时间单元集合的子集,所述第四时间单元集合为所述第一时间单元集合的子集,所述第四时间单元集合中的起始时间单元晚于所述第三时间单元,所述P个时间单元从n’-P到n’-1连续编号;所述n'包括:所述第三时间单元为所述第一时间单元集合中的时间单元时,所述n'为所述第三时间单元在所述第一时间单元集合中的编号;或者,所述第三时间单元不为所述第一时间单元集合中的时间单元时,所述n'为所述第三时间单元之后,第一个属于所述第一时间单元集合中的时间单元的编号。
根据本申请实施例提供的通信方法,第一终端设备可以自行根据检测周期数据到达之前的多个时间单元上发送过的历史周期性数据,是否在第四时间单元集合中有与历史周期 性数据预约的时间单元满足预设定关系式的时间单元,排除第四时间单元集合内与该历史周期性数据预约的时间单元满足预设定关系式的时间单元(即除去不能用于发送上述周期性数据的时间单元),并在第四时间单元集合内剩余的时间单元中选择上述的第一时间单元,也就是说本申请实施例提供的通信方法第一终端设备可以无需通过网络设备的配置,自行确定第一时间单元集合中的发送周期性数据的第一时间单元。
应理解,上述第一终端设备在第四时间单元集合内剩余的时间单元中选择上述的第一时间单元可以是任意选择一个时间单元作为第一时间单元,也可以是根据对剩余的时间单元计算能量的平均值,并选取平均能量较小时间单元的作为第一时间单元。
还应理解,本申请实施例中所涉及的历史周期性数据预约的至少一个时间单元指的是该历史周期性数据到达第一终端设备的时候,由于该数据是周期性的,第一终端设备确定需要为该历史周期性数据预约时间单元,理论上该预约时间单元上不能再传输其他的数据只能用于传输该历史周期性数据,也就是说如果在上述的第四时间单元集合中包括该预留时间单元中的至少一个时间单元时,该至少一个时间单元不能用于传输第一终端设备在上述第三时间单元接收到的周期性数据。但是,本申请中并不限制历史周期性数据的内容不发生任何变化,也就是说上述的历史周期性数据预约的至少一个时间单元传输的数据可以仍然为该历史周期性数据,或者,该历史周期性数据变化之后的数据。
一种可能的实现方式,上述P=P N×S symbol个时间单元,所述P N为正整数,S symbol表示所述一个帧结构周期内可用于侧行链路通信传输的时间单元数,所述P N×S symbol个时间单元从n’-P N×S symbol到n’-1连续编号,其中,P N的具体值可以是网络设备通过高层信令配置给第一终端设备的,还可以是协议预定义的,本申请对此并不限制。例如,高层信令指示P N为100,则第三时间单元集合中包括第三时间单元之前的100×S symbol个时间单元,其中,该100×S symbol个时间单元的编号从n'-100×S symbol到n'-1顺序排序。
另一种可能的实现方式,P为预配置的,或高层信令配置的,例如,协议规定P=200。
结合第一方面,在第一方面的某些实现方式中,所述第一终端设备确定第三时间单元集合内发送的历史周期性数据包括:所述第一终端设备确定所述第三时间单元集合内的第四时间单元上所述第一终端设备的第一历史周期性数据;所述第一终端设备确定第四时间单元集合内所述历史周期性数据预约的至少一个时间单元包括:所述第一终端设备确定第四时间单元集合内所述第一历史周期性数据预约的至少一个时间单元。
根据本申请实施例提供的通信方法,第一终端设备在第四时间单元集合中除去不能够用于发送周期性数据的时间单元时,应该考虑第三时间单元集合中的时间单元上自身发送的历史周期性数据预约的时间单元,需要在第四时间单元集合中排除与自身发送的第一历史周期性数据预约的时间单元满足预设定关系式的时间单元。
结合第一方面,在第一方面的某些实现方式中,所述剩余的时间单元包括:所述第四时间单元集合中排除与所述第一历史周期性数据预约的至少一个时间单元满足第一预设时间关系的时间单元;其中,所述第一预设时间关系为存在自然数j使得满足:
y+j×[S symbol×P rsvp_TX/N symbol]=z+q×[S symbol×P″ rsvp_TX/N symbol],其中,z+q×[S symbol×P″ rsvp_TX/N symbol]表示所述第一历史周期性数据预约的至少一个时间单元的 编号,z为所述第四时间单元的编号,q为小于或者等于Q 1的正整数,y为与所述第一历史周期性数据预约的至少一个时间单元满足第一预设时间关系的时间单元的编号,j为小于或者等于C resel-1的自然数,C resel为所述周期性数据的预约个数,N symbol表示预设的帧结构配置下的一个帧结构周期内的总的时间单元数,S symbol表示一个帧结构周期内可用于侧行链路通信传输的时间单元数,P rsvp_TX表示所述周期性数据的预约周期,所述周期性数据的预约周期的单位为时间单元,P” rsvp_TX表示所述第一历史周期性数据的预约周期,所述第一历史周期性数据的预约周期的单位为时间单元,[]表示向下或向上取整运算,当P” rsvp_TX/(K*N symbol)<1,且n'-z≤[S symbol×P″ rsvp_TX/N symbol]时,Q 1=K/(P” rsvp_TX/N symbol),否则,Q 1=1,其中,K为预配置的正整数,或者K为高层信令指示的正整数,或者K为动态指示的正整数。应理解K的取值大小能够约束上述q等于1的可能性,K取值越大,则q等于1的可能性越小。
根据本申请实施例提供的通信方法,第三时间单元集合中的第四时间单元上自身发送的数据的预约的时间单元与第四时间单元集合内的需要排除的时间单元存在自然数j使得编号为y的时间单元满足等式:
y+j×[S symbol×P rsvp_TX/N symbol]=z+q×[S symbol×P′ rsvp_TX/N symbol]。
应理解,本申请中第一预设时间关系指的是有自然数j使得上述的等式成立,则等式中的y对应的第四时间单元集合内的时间单元需要被排除。
应理解,本申请中涉及的数据的预约周期的单位为时间单元。
还应理解,若上述的第三时间单元集合中并不存在上述第一终端设备发送的第一历史周期性数据的时间单元,则无需执行上述的在第四时间单元集合中排除与自身发送的历史周期性数据预约的时间单元满足第一预设时间关系的时间单元。
结合第一方面,在第一方面的某些实现方式中,所述第一终端设备确定第三时间单元集合内发送的历史周期性数据包括:所述第一终端设备侦听到来自第二终端设备的侧行链路控制信息SCI,所述SCI用于指示所述第二终端设备的第二历史周期性数据;
所述第一终端设备对所述SCI进行译码,获得所述第二历史周期性数据的周期P rsvp_RX和优先级prio RX,所述P rsvp_RX和prio RX用于确定门限值Th prioTX,prioRX,所述第二终端设备为所述第一终端设备之外的终端设备;所述第一终端设备确定第四时间单元集合内所述历史周期性数据预约的至少一个时间单元包括:所述第一终端设备确定所述第三时间单元集合内的第五时间单元上所述第二历史周期性数据的参考信号接收功率RSRP的测量结果大于所述Th prioTX,prioRX,所述第一终端设备确定第四时间单元集合内所述第二历史周期性数据预约的至少一个时间单元。
根据本申请实施例提供的通信方法,第一终端设备在第四时间单元集合中除去不能够用于发送上述的周期性数据的时间单元时,还应该考虑第三时间单元集合中的时间单元上其他的终端设备发送的历史周期性数据预约的时间单元,在第四时间单元集合中排除与其他的终端设备发送的历史周期性数据预约的时间单元满足预设定公式的时间单元。
应理解,如果上述的第四时间单元集合内剩余的时间单元占用第四时间单元集合中总的时间单元数比率小于20%时,需要调整上述的门限值Th prioTX,prioRX的大小,直至第四时间单元集合内剩余的时间单元占用第四时间单元集合中总的时间单元数比率大于或等 于20%。
还应理解,上述的第二终端设备并不特指某一个终端设备,可以指的是上述第一终端设备之外的其他的一个或多个终端设备,可以理解为上述的第一终端设备可以侦听其他的至少一个终端设备在上述的第三时间单元集合上是否发送过历史周期性数据,以及该历史周期性数据的预约时间单元是否被包括在上述的第四时间单元集合中。
结合第一方面,在第一方面的某些实现方式中,所述剩余的时间单元包括:所述第四时间单元集合中排除与所述第二历史周期性数据预约的至少一个时间单元满足第二预设时间关系的时间单元;其中,所述第二预设时间关系为存在自然数j使得满足:
y'+j×[S symbol×P rsvp_TX/N symbol]=z'+q×[S symbol×P rsvp_RX/N symbol],其中,z'+q×[S symbol×P rsvp_RX/N symbol]表示所述第二历史周期性数据预约的至少一个时间单元的编号,z’为第五时间单元的编号,q为小于或者等于Q 2的正整数,y’为与所述第二历史周期性数据预约的至少一个时间单元满足第二预设时间关系的时间单元的编号,j为小于或者等于C resel-1的自然数,C resel为所述周期性数据的预约个数,S symbol表示一个帧结构周期内可用于侧行链路通信传输的时间单元数,N symbol表示一个帧结构周期内的总的时间单元数,P rsvp_TX表示所述周期性数据的预约周期,周期性数据的预约周期的单位为时间单元,P rsvp_RX表示所述第二历史周期性数据的预约周期,所述第二历史周期性数据的预约周期的单位为时间单元,[]表示向下或向上取整运算,当P rsvp_RX/(K*N symbol)<1,且n'-z'≤N symbol×P rsvp_RX时,Q 2=K/(P rsvp_RX/N symbol),否则,Q 2=1,其中,K为预配置的正整数,或者K为高层信令指示的正整数,或者K为动态指示的正整数。
根据本申请实施例提供的通信方法,第三时间单元集合中的第五时间单元上其他的第二终端设备发送的数据的预约时间单元与第四时间单元集合内的需要排除的时间单元之间存在自然数j使得编号为y’的需要排除的时间单元满足等式:
y'+j×[S symbol×P rsvp_TX/N symbol]=z'+q×[S symbol×P rsvp_RX/N symbol]。
应理解,本申请中第二预设时间关系指的是有自然数j使得上述的等式成立,则等式中的y对应的第四时间单元集合内的时间单元需要被排除。
结合第一方面,在第一方面的某些实现方式中,所述第一时域间隔P’ rsvp_TX表示为一个帧结构周期内可用于侧行链路通信传输的时间单元数S symbol与所述周期性数据的预约周期P rsvp_TX内包含的系统帧数的乘积;所述第二时间单元集合中第M个时间单元与所述第一时间单元之间的时域间隔为M个所述第一时域间隔,其中,所述M为小于或者等于N-1的正整数。
根据本申请实施例提供的通信方法,第一终端设备在第四时间单元集合中确定第一时间单元之后,可以根据第一时间单元和第二时间单元集合中的时间单元之间的时域间隔关系,确定出第二时间单元集合。从而实现在第一时间单元和第二时间单元集合上发送周期性数据。
结合第一方面,在第一方面的某些实现方式中,所述周期性数据的预约周期P rsvp_TX内包含的系统帧数表示为所述周期性数据的预约周期P rsvp_TX与所述一个帧结构周期内的总 的时间单元数N symbo的比值,则所述第一时域间隔P’ rsvp_TX表示为P’ rsvp_TX=[S symbol×P rsvp_TX/N symbol],[]表示向下或向上取整运算。
根据本申请实施例提供的通信方法,第一时域间隔可以用表达式P’ rsvp_TX=[S symbol×P rsvp_TX/N symbol]进行表示,那么第一时间单元与第二时间单元集合中的第M个时间单元之间的时域间隔可以用表达式M×P’ rsvp_TX进行表示
应理解,若上述的第三时间单元集合中并不存在上述第二终端设备发送的历史周期性数据的时间单元,则无需执行上述的在第四时间单元集合中排除与第二终端设备发送的历史周期性数据预约的时间单元满足第二预设时间关系的时间单元。
第二方面,提供了一种通信方法,包括:网络设备确定半静态调度SPS信息,所述SPS信息用于指示第一终端设备可以通过第一时间单元集合中的第一时间单元发送周期性数据,其中,所述SPS信息中包括SPS的周期P SPS,所述P SPS用于确定第一时域间隔,
所述第一时域间隔P’ SPS表示为一个帧结构周期内可用于侧行链路通信传输的时间单元数S symbol与所述SPS的周期P SPS内包含的系统帧数的乘积;所述第一时间单元集合中的时间单元可用于传输侧行链路业务数据、侧行链路控制信息和侧行链路反馈信息中的至少一种,所述第一时间单元集合中包括多个时间单元,所述多个时间单元按照时间顺序连续编号,所述第一时域间隔和预约个数N用于在所述第一时间单元集合中确定第二时间单元集合,所述第二时间单元集合中的时间单元用于所述第一终端设备发送所述周期性数据,所述第二时间单元集合包括N-1个时间单元,所述第二时间单元集合中的第一个时间单元与所述第一时间单元之间的时域间隔为所述第一时域间隔,且所述第二时间单元集合中的任意相邻的两个时间单元之间的时域间隔为所述第一时域间隔,所述第二时间单元集合中的时间单元的编号大于所述第一时间单元的编号;所述网络设备向所述第一终端设备发送所述SPS信息。
根据本申请实施例提供的通信方法,网络设备向第一终端设备发送SPS信息,指示第一终端设备可以通过第一时间单元集合中的第一时间单元发送周期性数据。并且,由于网络设备发送的SPS信息中携带有SPS的周期,第一终端设备能够基于该SPS的周期和自身已知的SPS的周期P SPS内包含的系统帧数和S symbol进一步地去确定第一时间单元集合中发送周期性数据的第二时间单元集合。
结合第二方面,在第二方面的某些实现方式中,所述周期P SPS内包含的系统帧数表示为所述周期P SPS与所述一个帧结构周期内的总的时间单元数N symbol的比值,则所述第一时域间隔P’ SPS表示为P’ SPS=[S symbol×P SPS/N symbol],[]表示向下或向上取整运算。
根据本申请实施例提供的通信方法,第一时域间隔可以用表达式P’ SPS=[S symbol×P SPS/N symbol]进行表示,那么第一时间单元与第二时间单元集合中的第M个时间单元之间的时域间隔可以用表达式M×P’ SPS进行表示。
结合第二方面,在第二方面的某些实现方式中,所述第二时间单元集合中第M个时间单元与所述第一时间单元之间的时域间隔为M个所述第一时域间隔,其中,所述M为小于或者等于N-1的正整数。
根据本申请实施例提供的通信方法,第一时间单元和第二时间单元集合中的时间单元之间的时域间隔满足一定关系,能够基于第一时间单元确定出第二时间单元集合。从而实 现在第一时间单元和第二时间单元集合上发送周期性数据。
第三方面,提供了一种通信装置,该装置可以用来执行第一方面及第一方面的任意可能的实现方式中的第一终端设备的操作。具体地,通信装置包括用于执行上述第一方面所描述的步骤或功能相对应的部件(means)可以是第一方面的第一终端设备或第一终端设备内部的芯片或功能模块。步骤或功能可以通过软件实现,或硬件实现,或者通过硬件和软件结合来实现。
第四方面,提供了一种通信装置,该装置可以用来用于执行第二方面及第二方面的任意可能的实现方式中的网络设备的操作。具体地,该通信装置可以包括用于执行上述第二方面所描述的步骤或功能相对应的部件(means)可以是第二方面的网络设备或网络设备内部的芯片或功能模块。步骤或功能可以通过软件实现,或硬件实现,或者通过硬件和软件结合来实现。
第五方面,提供了一种通信设备,包括,处理器,收发器,存储器,该存储器用于存储计算机程序,该收发器,用于执行第一或第二方面中任一种可能实现方式中的通信方法中的收发步骤,该处理器用于从存储器中调用并运行该计算机程序,使得该通信设备执行第一或第二方面中任一种可能实现方式中的通信方法。
可选地,处理器为一个或多个,存储器为一个或多个。
可选地,存储器可以与处理器集成在一起,或者存储器与处理器分离设置。
可选的,收发器包括,发射机(发射器)和接收机(接收器)。
一个可能的设计中,提供了一种通信设备,包括收发器、处理器和存储器。该处理器用于控制收发器收发信号,该存储器用于存储计算机程序,该处理器用于从存储器中调用并运行该计算机程序,使得该通信设备执行第一方面或第一方面任一种可能实现方式中的方法。
另一个可能的设计中,提供了一种通信设备,包括收发器、处理器和存储器。该处理器用于控制收发器收发信号,该存储器用于存储计算机程序,该处理器用于从存储器中调用并运行该计算机程序,使得该通信设备执行第二方面或第二方面任一种可能实现方式中的方法。
第六方面,提供了一种系统,系统包括第三方面和第四方面提供的通信装置。
第七方面,提供了一种计算机程序产品,计算机程序产品包括:计算机程序(也可以称为代码,或指令),当计算机程序被运行时,使得计算机执行上述第一方面或第二方面中任一种可能实现方式中的方法。
第八方面,提供了一种计算机可读介质,计算机可读介质存储有计算机程序(也可以称为代码,或指令)当其在计算机上运行时,使得计算机执行上述第一方面或第二方面中任一种可能实现方式中的方法。
第九方面,提供了一种芯片系统,包括存储器和处理器,该存储器用于存储计算机程序,该处理器用于从存储器中调用并运行该计算机程序,使得安装有该芯片系统的通信设备执行上述第一方面或第二方面中任一种可能实现方式中的方法。
附图说明
图1是现有技术中的V2X系统的示意图。
图2是适用于本申请实施例的通信系统的示意性框图。
图3是本申请实施例提供的一种PSSCH传输示意图。
图4是本申请实施例提供的一种用于传输PSSCH的子帧示意图。
图5是本申请实施例提供的一种子帧集合的示意图。
图6是本申请实施例提供的一种帧结构示意图。
图7是本申请实施例提供的时隙类型的示意图。
图8是本申请实施例提供的一种通信方法流程示意图。
图9是本申请实施例提供的一种帧结构示意图。
图10是本申请实施例提供的一种时间单元集合示意图。
图11是本申请提出的通信装置10的示意图。
图12是适用于本申请实施例的第一终端设备20的结构示意图。
图13是本申请提出的通信装置30的示意图。
图14是适用于本申请实施例的网络设备40的结构示意图。
具体实施方式
下面将结合附图,对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统,例如:全球移动通信(global system for mobile communications,GSM)系统、码分多址(code division multiple access,CDMA)系统、宽带码分多址(wideband code division multiple access,WCDMA)系统、通用分组无线业务(general packet radio service,GPRS)、长期演进(long term evolution,LTE)系统、LTE频分双工(frequency division duplex,FDD)系统、LTE时分双工(time division duplex,TDD)、通用移动通信系统(universal mobile telecommunication system,UMTS)、全球互联微波接入(worldwide interoperability for microwave access,WiMAX)通信系统、未来的第五代(5th generation,5G)系统或新无线(new radio,NR)等。
本申请实施例中的第一终端设备可以指用户设备(user equipment,UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。第一终端设备还可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol,SIP)电话、无线本地环路(wireless local loop,WLL)站、个人数字助理(personal digital assistant,PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备,未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network,PLMN)中的终端设备等,本申请实施例对此并不限定。
本申请实施例中的网络设备可以是用于与第一终端设备通信的设备,该网络设备可以是全球移动通信(global system for mobile communications,GSM)系统或码分多址(code division multiple access,CDMA)中的基站(base transceiver station,BTS),也可以是宽带码分多址(wideband code division multiple access,WCDMA)系统中的基站(NodeB,NB),还可以是LTE系统中的演进型基站(evolved NodeB,eNB或eNodeB),还可以是云无线接入网络(cloud radio access network,CRAN)场景下的无线控制器,或者该网络设备可以为中继站、接入点、车载设备、可穿戴设备以及未来5G网络中的网络设备或 者未来演进的PLMN网络中的网络设备等,本申请实施例并不限定。
在本申请实施例中,第一终端设备或网络设备包括硬件层、运行在硬件层之上的操作系统层,以及运行在操作系统层上的应用层。该硬件层包括中央处理器(central processing unit,CPU)、内存管理单元(memory management unit,MMU)和内存(也称为主存)等硬件。该操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统,例如,Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、即时通信软件等应用。并且,本申请实施例并未对本申请实施例提供的方法的执行主体的具体结构特别限定,只要能够通过运行记录有本申请实施例的提供的方法的代码的程序,以根据本申请实施例提供的方法进行通信即可,例如,本申请实施例提供的方法的执行主体可以是第一终端设备或网络设备,或者,是第一终端设备或网络设备中能够调用程序并执行程序的功能模块。
另外,本申请的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。本申请中使用的术语“制品”涵盖可从任何计算机可读器件、载体或介质访问的计算机程序。例如,计算机可读介质可以包括,但不限于:磁存储器件(例如,硬盘、软盘或磁带等),光盘(例如,压缩盘(compact disc,CD)、数字通用盘(digital versatile disc,DVD)等),智能卡和闪存器件(例如,可擦写可编程只读存储器(erasable programmable read-only memory,EPROM)、卡、棒或钥匙驱动器等)。另外,本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读介质”可包括但不限于,无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
随着无线通信技术的发展,人们对高数据速率和用户体验的需求日益增长,同时人们对了解周边人或事物并与之通信的邻近服务的需求逐渐增加,因此设备到设备(device to device,D2D)通信技术应运而生。D2D通信技术的应用,可以减轻蜂窝网络的负担、减少终端设备的电池功耗、提高数据速率,并能很好地满足邻近服务的需求。D2D通信技术允许多个支持D2D功能的终端设备在有网络基础设施或无网络基础设施的情况下进行直接发现和直接通信。鉴于D2D通信技术的特点和优势,基于D2D通信技术的车联网应用场景被提出,但是因涉及安全性的考虑,这种场景下对时延的要求非常高,现有的D2D通信技术无法实现。
进而,在第三代合作伙伴计划(the 3rd generation partnership project,3GPP)提出的LTE系统下,车与任何事物通信的车联网(vehicle to everything,V2X)技术(X代表任何事物)被提出。V2X系统中的通信方式统称为V2X通信。例如,该V2X通信包括:车辆与车辆(vehicle to vehicle,V2V)之间的通信,车辆与路边基础设施(vehicle to infrastructure,V2I)之间的通信、车辆与行人之间的通信(vehicle to pedestrian,V2P)或车辆与网络(vehicle to network,V2N)之间的通信等。V2X系统中所涉及的终端设备之间进行的通信被广泛称为侧行链路(slidelink,SL)通信。
目前,车辆可以通过V2V、V2I、V2P或者V2N通信方式,及时获取路况信息或接收服务信息,这些通信方式可以统称为V2X通信。图1是现有技术中的V2X系统的示意图。该示意图包括V2V通信、V2P通信以及V2I/N通信。
V2X通信针对以车辆为代表的高速设备,是未来对通信时延要求非常高的场景下应用的基础技术和关键技术,如智能汽车、自动驾驶、智能交通运输系统等场景。
如图1所示,车辆之间通过V2V通信。车辆可以将自身的车速、行驶方向、具体位置、是否踩了紧急刹车等信息广播给周围车辆,周围车辆的驾驶员通过获取该类信息,可以更好的感知视距外的交通状况,从而对危险状况做出提前预判进而做出避让;车辆与路侧基础设施通过V2I通信,路边基础设施,可以为车辆提供各类服务信息和数据网络的接入。其中,不停车收费、车内娱乐等功能都极大的提高了交通智能化。路边基础设施,例如,路侧单元(road side unit,RSU)包括两种类型:一种是终端设备类型的RSU。由于RSU分布在路边,该终端设备类型的RSU处于非移动状态,不需要考虑移动性;另一种是网络设备类型的RSU。该网络设备类型的RSU可以给与网络设备通信的车辆提供定时同步及资源调度。车辆与人(例如,车辆与行人、车辆与骑自行车的人、车辆与司机或车辆与乘客)通过V2P通信;车辆与网络通过V2N通信,V2N可以与上述的V2I统称为V2I/N。
应理解,图1只是为了介绍V2X系统而示出的一种示例性的示意图,不对本申请构成任何限定。例如,车辆数量、行人数量以及基础设施的数量可以为多个,并不是图1中所示的数量。图1简单介绍了现有技术中涉及的V2X系统,下面结合图2简单介绍本申请提供的实施所适用的场景。
图2所示为适用于本申请实施例的通信系统的示意性框图。如图2所示,在该通信系统100中,在传输数据之前,终端设备121与网络设备110可以通过信令交互确定用于与终端设备122传输数据所使用的资源,随后,该终端设备121使用确定的资源与该终端设备122通信;或者,在传输数据之前,终端设备122与网络设备110可以通过信令交互确定与终端设备121传输数据所使用的资源,随后,该终端设备122使用确定的资源与终端设备121通信。即,本申请实施例应用于侧行链路数据传输的应用场景中。
应理解,图2只是一种示意图不对本申请的保护范围构成任何限定。例如,图2中所示的终端设备的个数只是一种举例。
还应理解,在本申请中将上述的V2X系统中所涉及的终端设备之间进行通信称之为侧行链路通信不对本申请构成任何限定。例如,还可以将侧行链路通信称之为边链路通信、直通链路通信或者副链路通信等;另外,并不一定限制在V2X系统中,其他场景下,终端设备之间进行通信也可以称为侧行链路通信。
图2介绍了本申请实施例能够应用的场景,为了便于对本申请技术方案的理解,下面简单介绍本申请技术方案中涉及的几种基本概念。
1、帧结构。
本申请下述内容中主要涉及LTE帧结构以及5G NR帧结构。应理解,针对LTE帧结构以及5G NR帧结构在现有协议中已经详细定义了,本申请中只是直接应用现有协议中对于LTE帧结构以及5G NR帧结构的定义。因此,对于帧结构本申请中只是简单描述,相关内容可以查阅现有协议中的规定,本申请中对于具体的LTE帧结构以及5G NR帧结构不进行详述。
1)LTE帧结构。
LTE分两种不同的双工方式,不同的双工方式最直接的就是对于空中接口无线帧结构的影响,因为FDD采用频率来区分上、下行,其单方向的资源在时间上是连续的;而TDD则采用时间来区分上、下行,其单方向的资源在时间上是不连续的,而且需要保护时间间 隔,来避免两个方向之间的收发干扰,所以LTE分别为FDD和TDD设计了各自的帧结构。
LTE针对TDD模式中上、下行时间转换的需要,设计了如下专门的帧结构:
采用无线帧结构,无线帧长度是10ms,由两个长度为5ms的半帧组成,每个半帧由5个长度为1ms的子帧组成,其中有4个普通的子帧和1个特殊子帧。所以整个帧也可理解为分成了10个长度为1ms的子帧作为数据调度和传输的单位(即TTI)。其中,特殊子帧包含三个部分:下行传输特殊帧(downlink pilot time slot,DwPTS)、保护间隔(guard period,GP)、上行传输特殊帧(uplink pilot time slot,UpPTS)。DwPTS传输的是下行的参考信号,也可以传输一些控制信息。UpPTS上可以传输一些短的随机接入信道(random access channel,RACH)和信道探测参考信号(sounding reference signal,SRS)的信息,GP是上下行之间的保护时间。
LTE FDD类型的无线帧长为10ms,每帧含10个子帧、20个时隙。每个子帧有两个时隙,每个时隙为0.5ms。LTE的每个时隙有可以有若干个物理资源块(physical resource block,PRB),每个PRB含有多个子载波。
2)5G NR帧结构。
与LTE(子载波间隔和符号长度)相比,5G NR支持多种子载波间隔(在LTE中,只有15Khz这种子载波间隔),其他与上述的LTE帧结构类似,这里不再赘述。
2、LTE V2X。
LTE V2X是基于移动蜂窝网络的V2X通信技术,就像是手机连入3G/4G一样。LTE V2X针对车辆应用定义了两种通信方式:集中式和分布式。集中式也称为蜂窝式,需要基站作为控制中心;分布式也称为直通式,无需基站作为支撑。
3、LTE V2X资源配置。
现有协议中LTE V2X通信可以支持有网络覆盖和无网络覆盖的通信场景,其资源配置方式可以采取网络设备分配模式和终端设备自选模式。具体地,在LTE V2X通信系统中,网络设备分配模式为LTE协议标准中定义的模式3(mode 3),以下简称LTE mode 3;终端设备自选模式为LTE协议标准中定义的模式4(mode 4),以下简称LTE mode 4。网络设备分配模式主要应用于有网络覆盖的情形下的V2X通信,网络设备统一根据终端设备的缓存状态报告(buffer state report,BSR)的上报情况,集中进行资源配置。网络设备进行资源的分配的调度模式可以是半静态调度(semi persistent scheduling,SPS)调度模式或动态调度模式。针对终端设备的周期性数据,可以使用SPS调度模式。SPS模式以及动态调度模式为现有中的调度模式,本申请中直接利用即可,这里不再赘述。
终端设备自选模式主要应用于没有网络覆盖情况下的V2X通信,因为没有网络设备的统一资源管理,V2X终端设备只能自己选择通信资源进行V2X通信。但是为了降低和其他V2X终端设备选择至少部分重复的通信资源,而导致资源选择碰撞的概率,引用了基于历史侦听信息的方式:
根据历史信息判断某一个潜在可用资源是否被其他终端设备占用,若该潜在可用资源别某个终端设备占用了,进一步判断是否能够解码该终端设备的调度分配(scheduling assignment,SA)信息以获得该终端设备的一些特征信息,例如该终端设备的优先级、资源预约情况等,来预判在未来的资源选择时间窗口内该潜在可用资源是否会被该终端设备 占用继续占用,并在未来的资源选择时间窗口内随机选择一个可用资源用于进行V2X传输。
针对mode 3和mode 4,LTE定义了传输物理层侧行链路共享信道(physical sidelink shared channel,PSSCH)的子帧集合
Figure PCTCN2020086424-appb-000001
具体地,本申请中所涉及的PSSCH也可以称之为侧行链路业务数据。该子帧集合内的每个子帧满足
Figure PCTCN2020086424-appb-000002
其中,i=0,1,…,max,为每个子帧的编号;10240表示一个系统帧内总的子帧个数。并且如下子帧应当被排除在上述的传输PSSCH的子帧集合之外:
1)用于传输侧行链路通信同步信号的子帧;
2)TDD模式下的下行子帧和特殊子帧;
3)预留子帧;
最终传输PSSCH的子帧集合
Figure PCTCN2020086424-appb-000003
为一个系统帧内总的子帧除上述的1)、2)、3)三种情况所示的子帧之外的剩余子帧。具体地,上述子帧集合内的子帧为所述剩余的子帧按照时间顺序连续编号。
例如,一个系统帧内总的子帧除上述的用于侧行链路通信同步信号的子帧、TDD模式下的下行子帧和特殊子帧以及预留子帧之后还剩余100个子帧。则上述的PSSCH子帧集合包括剩余的100个子帧,并且在PSSCH子帧集合内该100个子帧从0开始顺序编号。具体地,在PSSCH子帧集合内该100个子帧按照编号的大小,从小到大排序得到:
Figure PCTCN2020086424-appb-000004
示例性地,在LTE mode 3下,假设当前的资源配置模式为基于网络设备周期调度的SPS模式。当传输PSSCH的时频资源对应的子帧集合为
Figure PCTCN2020086424-appb-000005
时,如果在子帧
Figure PCTCN2020086424-appb-000006
的起始时刻,网络设备将某块时频资源分配给SPS状态下的某个终端设备在子帧
Figure PCTCN2020086424-appb-000007
中用于传输PSSCH。则在子帧
Figure PCTCN2020086424-appb-000008
中,该终端设备可使用相同的时频资源进行PSSCH传输。这里j=1,2,...,P’ SPS=P step×P SPS/100,P SPS表示SPS的配置周期,P step的值与LTE中的帧结构相关,P step具体定义如表1所示:
表1 P step与帧结构的对应关系表
Figure PCTCN2020086424-appb-000009
表1中的帧结构为LTE现有中可能的帧结构形式;D、S、U以及D/U为每个子帧的传输状态。其中,上行传输(uplink,UL)状态简称为U;下行传输(downlink,DL)状态简称为D;特殊状态(special,S);下行或上行传输(downlink or uplink,D/U)状态。
由表1可以看出,P step的值可以看为某种帧结构配置下,上行传输状态子帧的个数乘以10。例如,从表1中可以看出当帧结构为TDD配置2时,此时上行传输状态子帧的个数为2,则P step的值为2*10=20。如图3所示,图3是本申请实施例提供的一种PSSCH传输示意图。包括:
当终端设备第一次传输PSSCH为第一帧中的第一个上行子帧,且SPS的周期P SPS为20ms时,则终端设备第二次传输PSSCH为第三帧中的第一个上行子帧。图3只是一种举例形式的示意图,不对本申请构成任何限定。
根据PSSCH子帧集合
Figure PCTCN2020086424-appb-000010
的定义,将图3的帧结构中下行子帧和特殊子帧排除,假设预留子帧的个数为0,用于传输PSSCH的子帧集合如图4所示,图4是本申请实施例提供的一种用于传输PSSCH的子帧示意图。
图4中的终端设备第一次传输PSSCH为第一帧中的第一个上行子帧,终端设备第二次传输PSSCH为第三帧中的第一个上行子帧,这两个子帧在PSSCH子帧集合
Figure PCTCN2020086424-appb-000011
的间隔为4。通过以下公式计算得到:
P’ SPS=P step×P SPS/100=20×20/100=4。
其中,P′ SPS=P step×P SPS/100可解释为某种帧结构配置下一个系统帧内上行传输状态的子帧的个数与SPS的周期P SPS内所包含的系统帧个数的乘积。
在LTE mode 4下,且终端设备有周期PSSCH要发送的时候,假设终端设备的周期PSSCH在子帧n到达,终端设备根据高层信令配置,开始进行资源选择或资源重选,具体地,如图5所示,图5是本申请实施例提供的一种子帧集合的示意图,终端设备查看子帧n之前的10×P step个子帧(从n-10×P step到n-1)的历史侦听信息(P step的定义同表1),排除资源选择时间窗口[n+T 1,n+T 2]内的不可用资源(T 1≤4,20≤T 2≤100),并在剩余资源集合内随机选择某块可用的时频资源用于传输所述PSSCH。这里资源选择时间窗口[n+T 1,n+T 2]内的每一份可用资源定义为R x,y,这里y表示子帧号,x表示一组长度为L的连续时频资源集合。
对于mode 4下的子帧集合
Figure PCTCN2020086424-appb-000012
如果在子帧
Figure PCTCN2020086424-appb-000013
的起始时刻,某个终端设备完成资源排除后采用某块可用的时频资源在
Figure PCTCN2020086424-appb-000014
子帧中传输PSSCH,则在子帧
Figure PCTCN2020086424-appb-000015
中,该终端设备可使用相同的时频资源进行PSSCH传输。
其中,j=1,2,...,C resel-1,P’ rsvp_TX=P step×P rsvp_TX/100,P rsvp_TX表示终端设备的PSSCH的预约周期,P step的定义与帧结构相关,同表1这里不再赘述。C resel表示mode 4下终端设备需要传输的PSSCH的预约个数。例如:当帧结构为TDD配置2,且PSSCH的预约周期P rsvp_TX为20ms时,如图3和图4所示,P′ rsvp_TX=20×20/100=4。P′ rsvp_TX=P step×P rsvp_TX/100的物理意义与P’ SPS=P step×P SPS/100相同,表示为某种帧结构配置下一个系统帧内上行子帧的个数与PSSCH预约周期P rsvp_TX内所包含的系统帧个数的乘积。
在子帧
Figure PCTCN2020086424-appb-000016
时刻,终端设备持续监测子帧集合
Figure PCTCN2020086424-appb-000017
内除了该 终端设备自身发送过数据的子帧。具体的资源排除原则如下所示:
1)假设该终端设备在子帧
Figure PCTCN2020086424-appb-000018
上发送过数据,则如果存在整数j满足y+j*P′ rsvp_TX=z+P step×q×k,则资源R x,y应当被排除,其中,x指示资源R x,y的频域位置,y指示资源R x,y的时域位置,应理解本申请并不涉及如何确定资源R x,y的频域位置,所以也可以将排除资源R x,y理解为排除编号为y的时间单元。这里j=1,2,...,C resel-1,。C resel表示mode 4下PSSCH的预约个数,P′ rsvp_TX=P step×P rsvp_TX/100,P step的定义与帧结构相关,同表1。k由高层参数限制资源保留期限(restrict resource reservation period)配置,q=1,2,..Q。当k<1并且n′-z≤P step×k,Q=1/k,否则,Q=1。这里n′的定义如下:如果
Figure PCTCN2020086424-appb-000019
属于子帧集合
Figure PCTCN2020086424-appb-000020
Figure PCTCN2020086424-appb-000021
否则,
Figure PCTCN2020086424-appb-000022
为子帧
Figure PCTCN2020086424-appb-000023
之后,第一个属于子帧集合
Figure PCTCN2020086424-appb-000024
的子帧。
2)假设该终端设备在子帧
Figure PCTCN2020086424-appb-000025
上获取到其他终端设备的侧行链路控制信息(sidelink control information,SCI),并且译码该SCI,获得其他终端设备传输的PSSCH的P rsvp_RX和prio RX,基于该P rsvp_RX和prio RX计算得到门限值Th prioTX,prioRX。如果上述其他终端设备传输的PSSCH的参考信号接收功率(reference signal received power,RSRP)的测量结果大于门限Th prioTX,prioRX,并且存在整数j满足y+j×P′ rsvp_TX=z'+q×P step×P rsvp_RX,则编号为y的时间单元对应的资源R x,y应当被排除。这里P′ rsvp_TX的定义同上,j=1,2,...,C resel-1,q=1,2,..Q。P step的定义与帧结构相关,同表1,P rsvp_RX由SCI格式1(format-1)中的资源预留域(resource reservation field)字段指示,定义如表2所示,具体数值X为PSSCH的预约周期除以100。当P rsvp_RX<1并且n′-m≤P step×P rsvp_RX,Q=1/P rsvp_RX,否则,Q=1。如果
Figure PCTCN2020086424-appb-000026
属于时间单元集合
Figure PCTCN2020086424-appb-000027
Figure PCTCN2020086424-appb-000028
Figure PCTCN2020086424-appb-000029
否则,
Figure PCTCN2020086424-appb-000030
为时间单元
Figure PCTCN2020086424-appb-000031
之后的、第一个属于时间单元集合
Figure PCTCN2020086424-appb-000032
中的时间单元。
表2
资源预留域 X
‘0001’,‘0010’,…,‘1010’ 1,2,…,10
‘1011’ 0.5
‘1100’ 0.2
‘0000’ 0
‘1101’,‘1110’,‘1111’ 预留
4、5G NR帧结构。
由现有协议定义的可知,相比于LTE的帧结构来说,NR的帧结构更加灵活多变。每个系统帧的长度与LTE相同,仍然为10ms,系统帧号(system frame number,SFN)的范围为0~1023,每个子帧的长度仍然为1ms,一个系统帧内的子帧号为0~9。5G NR中的 每个子帧内的时隙与子载波间隔关系如下表3所示:
表3时隙与子载波间隔关系
Figure PCTCN2020086424-appb-000033
以SCS为30kHz和120kHz为例的NR帧结构如图6所示,图6是本申请实施例提供的一种帧结构示意图。
与LTE中子帧级别的帧结构配置相比,NR的帧结构更加灵活,NR中的DL和UL的配置可为符号级别,分别为下行符号D,上行符号U,灵活符号X(可用于下行传输,上行传输,间隔(GAP)或作为预留资源)。并且NR中的时隙类型由图7中所示四种结构构成,图7是本申请实施例提供的时隙类型的示意图:
完全下行slot,用于下行传输;如图7中的(1)所示。
完全上行slot,用于上行传输;如图7中的(2)所示。
完全灵活slot;如图7中的(3)所示。
混合slot,至少一个下行和/或上行符号;如图7中的(4.1)-(4.5)所示。
应理解,图7只是一种示例,用于说明NR中的不同的时隙类型,不对本申请构成任何限定。
具体的5G NR中时隙配置方案可分为四层:
第一层:基于小区的无线资源控制(radio resource control,RRC)信令半静态配置,由系统信息块(system information block 1,SIB1)中的上行-下行普通配置(UL-DL-configuration-common)信息和上行-下行普通配置集合2(UL-DL-configuration-common-Set2)信息携带,帧结构周期为{0.5,0.625,1,1.25,2,2.5,5,10}ms,与子载波间隔独立。
第二层:基于UE的RRC信令半静态配置,由高层信令上行-下行专用配置(UL-DL-configuration-dedicated)携带,帧结构周期为{0.5,0.625,1,1.25,2,2.5,5,10}ms,与子载波间隔独立。
第三层:终端设备组时隙格式指示(user equipment group slot format information,UE-group SFI)信令动态配置,由下行控制信息格式2_0(downlink control information format2_0,DCI format 2_0)携带,帧结构周期为{1,2,4,5,8,10,20}slots,与子载波间隔独立。
第四层:终端设备专用时隙格式指示(user equipment specific downlink control information,UE-specific DCI)信令动态配置,由DCI format 0,1携带。
具体地,时隙中包含的每个符号的传输状态为以下的任意一种:
上行传输(uplink,UL)状态、下行传输(downlink,DL)状态和不确定(unknown)状态3种状态,可记为UL/DL/X(或,简记为U/D/X)。其中,X称为unknown状态或灵活(flexible)状态,终端设备在X状态对应的符号上既不收也不发信息。X也可以称之为F或U。
例如,时隙格式_0指的是一个时隙包含的14个符号的传输状态均为下行传输状态;时隙格式_1指的是一个时隙包含的14个符号的传输状态均为上行传输状态;时隙格式_2指的是一个时隙包含的14个符号的传输状态均为不上行也不上行传输状态等。在5G NR中时隙格式最多可能有256种,这里不一一列举。进一步地,不同的时隙格式包括的上行传输符号个数、下行传输符号个数或灵活符号个数不一样。应理解,本申请实施例并不涉及如何配置时隙格式,只涉及不同的子载波间隔对应着不同的帧结构,而不同的帧结构周期内时隙/符号的个数相异,因此这不再赘述NR中的时隙格式。
上面结合图3-图5简单介绍了,在LTE mode 3和LTE mode 4下的资源配置方式。其中,在资源配置过程中的P′ SPS=P step×P SPS/100与P’ rsvp_TX=P step×P rsvp_TX/100的值与LTE的帧结构强相关,而且LTE的帧结构为固定模式,如表1所示。也就是说上述的资源配置方式只能应用LTE V2X中。
基于V2X通信技术,车辆用户(vehicle user equipment,V-UE)能将自身的一些信息,例如位置、速度、意图(转弯、并线、倒车)等周期性以及一些非周期性的事件触发的信息向周围的V-UE发送,同样地V-UE也会实时接收周围的V-UE发送的信息。LTE V2X通信解决了V2X场景中的一些部分基础性的需求,但对于未来的完全智能驾驶、自动驾驶等应用场景而言,现阶段的LTE V2X通信还不能有效的支持。随着第五代新无线(5th generation new radio,5G NR)通信技术在3GPP标准组织中的开发,5G NR系统中的V2X也将进一步发展,比如可以支持更低的传输时延,更可靠的通信传输,更高的吞吐量,更好的用户体验,以满足更加广泛的应用场景需求。
本申请实施例为了5G NR V2X能够顺利发展,提出两种资源配置方式:
5G NR mode 1和5G NR mode 2,分别对应上述的LTE mode 3和LTE mode 4。
下面结合图8-图10详细介绍本申请实施例提供的通信方法。
图8是本申请实施例提供的一种通信方法流程示意图。从交互的角度说明本申请实施例提供的通信方法可能的流程,包括:第一终端设备和网络设备以及步骤S110-S140。
具体地,第一终端设备中存在需要周期性发送的周期性数据。即图8所示的方法流程中包括S111,第一终端设备确定待发送的周期性数据。第一终端设备确定待发送的周期性数据可以理解为待发送的周期性数据到达第一终端设备的物理层或其他传输层。
应理解,本申请中所涉及的周期性数据指的是某些业务的数据是周期性到达终端设备的,也就是说终端设备可以基于该数据的周期性特性确定未来时间上需要由于传输该周期性数据的时间单元。需要说明的是,本申请实施例中涉及的周期性数据重点在于该数据的传输特性是周期性地,而不限定该份数据本身是否发生变化,例如,第一个周期上传输的该数据和第二个周期上传输的该数据的内容可以是不同的。
为了确定传输该周期性数据的时频资源,执行下述步骤,应理解本申请中确定用于传输周期性数据的时频资源时,主要涉及确定该时频资源的时域位置,并不涉及对确定该时 频资源频域位置的改进,而在5G NR场景下,时域位置通常由时间单元确定,其中,本申请涉及的时间单元可以是5G NR中的符号或者时隙(如前文中表3所示,不同的子载波间隔对应不同的符号或时隙),也就是说下文中涉及到确定某个时间单元用于发送周期性数据时,应该理解成以该时间单元为时域位置的时频资源用于传输周期性数据。
S110,第一终端设备确定第一时间单元集合。
具体地,第一时间单元集合中包括的为协议规定的、一个系统帧内该第一终端设备能够用于传输周期性数据的时间单元。
应理解,本申请实施例中所涉及的周期性数据包括侧行链路业务数据、侧行链路控制信息和侧行链路反馈信息中的至少一种,其中,侧行链路业务数据也可以称为发送物理层侧行链路数据信道PSSCH、侧行链路控制信息也可以称为发送物理层侧行链路控制信道(physical sidelink control channel,PSCCH)、侧行链路反馈信息也可以称为发送物理层侧行链路反馈物理反馈信道(physical sidelink feedback channel,PSFCH),为了便于描述下面在涉及到周期性数据的时候以PSSCH代替。
还应理解,对于上述的第一终端设备传输PSSCH,可以理解为第一终端设备发送PSSCH,可以由多种描述,本申请对此并不限制,下面主要描述为第一终端设备传输PSSCH。
第一时间单元集合可以为
Figure PCTCN2020086424-appb-000034
其中,
Figure PCTCN2020086424-appb-000035
表示一个能够用于传输PSSCH的时间单元,i=0,1,…,max。
具体的,第一时间单元集合中的时间单元为符号的情况下,
Figure PCTCN2020086424-appb-000036
第一时间单元集合中的时间单元为时隙的情况下,
Figure PCTCN2020086424-appb-000037
10240表示一个系统帧内总的子帧个数,N slot表示不同子载波间隔下的每个子帧内的slot个数。并且如下时间单元应当被排除在上述的能够用于传输PSSCH的第一时间单元集合之外:
1)用于传输侧行链路通信同步信号SLSS的时间单元;
2)第一终端设备工作在TDD模式下的下行时间单元和特殊时间单元;
3)预留时间单元;
那么本申请所涉及的第一时间单元集合可以是如下任意一种时间单元集合:
1)预设子载波间隔对应的系统帧内所有时间单元中,排除系统帧内配置用于侧行链路通信同步信号(sidelink synchronizing signal,SLSS)发送的时间单元,如果为TDD载波,进一步排除TTD模式下的下行时间单元和特殊时间单元;
2)预设子载波间隔对应的系统帧内所有时间单元中,排除系统帧内配置用于SLSS发送的时间单元以及配置用于小区特定SRS发送的时间单元,如果为TDD载波,进一步排除TTD模式下的下行时间单元和特殊时间单元;
3)预设子载波间隔对应的系统帧内所有时间单元中,排除系统帧内配置用于SLSS发送的时间单元、配置用于小区特定SRS发送的时间单元以及配置用于PRACH发送的时间单元,如果为TDD载波,进一步排除TTD模式下的下行时间单元和特殊时间单元;
4)预设子载波间隔对应的系统帧内所有时间单元中,排除系统帧内配置用于SLSS发送的时间单元、配置用于小区特定SRS发送的时间单元以及预留给PUSCH的时间单元,如果为TDD载波,进一步排除TTD模式下的下行时间单元和特殊时间单元;
5)预设子载波间隔对应的系统帧内所有时间单元中,排除系统帧内配置用于SLSS发送的时间单元、配置用于小区特定SRS发送的时间单元、配置用于PRACH发送的时间单元以及预留给PUSCH的时间单元,如果为TDD载波,进一步排除TTD模式下的下行时间单元和特殊时间单元。
应理解,上述的1)-5)只是列举了几种第一时间单元集合可能形式,对本申请保护范围并不构成限定。本申请中所涉及的第一时间单元集合可以为现有协议定义的能够用于传输PSSCH的时间单元集合,还可以为通信技术发展过程中未来协议定义的能够用于传输PSSCH的时间单元集合。本申请对此并不严格限制,这里对第一时间单元集合也不再赘述。
具体地,上述的第一时间单元集合中包括多个时间单元,多个时间单元按照时间顺序连续编号,也就是说多个时间单元中的每个时间单元具有对应的编号。其中,每个时间单元的编号可以理解为该时间单元在第一时间单元集合中所处的排序。
示例性地,第一时间单元集合中的多个时间单元从编号为0开始按照时间顺序连续编号,则升序排序之后为:
Figure PCTCN2020086424-appb-000038
那么第一时间单元集合中的多个时间单元可以称为第0个时间单元、第1个时间单元…、第max个时间单元,其中max的值为第一时间单元集合中总的时间单元个数减1得到的值;
或者,第一时间单元集合中的多个时间单元从编号为1开始按照时间顺序连续编号,则升序排序之后为:
Figure PCTCN2020086424-appb-000039
那么第一时间单元集合中的多个时间单元可以称为第1个时间单元、第2个时间单元…、第max+1个时间单元;
或者,第一时间单元集合中的多个时间单元从编号为X开始按照时间顺序连续编号,则升序排序之后为:
Figure PCTCN2020086424-appb-000040
那么第一时间单元集合中的多个时间单元可以称为第X个时间单元、第X+1个时间单元…、第max+X个时间单元,X为正整数。
应理解,本申请实施例中对于第一时间单元集合中的多个时间单元从编号为某个数开始按照时间顺序连续编号并不限制,仅仅限制第一时间单元集合中的多个时间单元按照编号大小从小到大排序。下面,为了便于理解以一个具体的例子进行说明如何按照编号大小排序:
例如,第一时间单元集合中包括10个时间单元(SL#1~SL#10),将这10个时间单元从编号为0开始排序,以等差数列的公差为1依次编号,则10个时间单元的编号依次为0、1、2、3、4、5、6、7、8、9。最后将这10个时间单元按照编号的大小排序之后为:SL#1、SL#2、SL#3、SL#4、SL#5、SL#6、SL#7、SL#8、SL#9、SL#10。
上面以举例的形式简单说明了本申请中第一时间单元集合中的时间单元的按照编号大小排序方式。应该理解,上述只是举例,不能限制本申请的保护范围,具体的排序方式并不能枚举完,因此这里不再赘述。
S120,第一终端设备确定第一时间单元。
第一终端设备确定S110中确定的第一时间单元集合中的第一时间单元,该第一时间单元用于发送PSSCH。
示例性地,第一终端设备在第一时间单元的起始时刻,或第一时间单元的起始时刻之前,确定使用时域位置为第一时间单元的第一时频资源传输PSSCH。示例性地,本申请提供了两种第一终端设备确定第一时间单元的方案:
方案一:
第一终端设备确定第一时间单元集合中的第一时间单元之前,从网络设备接收到半静态调度SPS信息,该SPS信息指示第一时间单元集合中的第一时间单元用于发送PSSCH。
示例性地,第一终端设备在第一时间单元的起始时刻或在第一时间单元的起始时刻之前从网络设备接收到SPS信息,SPS信息指示在将时域位置为第一时间单元的第一时频资源分配给第一终端设备,使得第一终端设备在使用该第一时频资源传输PSSCH。
在方案一所示的情况下,图8所示的方法还包括S121,网络设备向第一终端设备发送SPS信息;以及S123,网络设备确定SPS信息。具体地,本申请中对于网络设备如何进行资源协调确定将第一时频资源分配给第一终端设备,使得第一终端设备在使用该第一时频资源传输PSSCH并不限制,可以是现有中的任意一种资源协调方案得到的结果。
为了便于理解,以一个具体的例子简单说明方案一中,第一终端设备如何获知使用第一时频资源传输PSSCH。
例如,网络设备根据负载情况,确定第一时频资源可以分配给第一终端设备,该第一时频资源的时域位置对应上述的第一时间单元,该第一终端设备可以在使用第一时频资源传输PSSCH。则在第一时间单元的起始时刻或第一时间单元的起始时刻之前,网络设备向该第一终端设备发送SPS信息,该SPS信息中指示第一终端设备通过第一时间单元集合中的第一时间单元为时域位置的第一时频资源用于发送所述PSSCH。
方案二:
在方案二所示的情况下,图8所示的方法还包括S122,第一终端设备进行时间单元排除。
具体地,首先第一终端设备确定第三时间单元集合内发送的历史周期性数据的预约时间单元。其中,历史周期性数据指的是上述的PSSCH达到之前的,终端设备接收到的数据,并且该数据也是周期性的;历史周期性数据的预约时间单元指的是第一终端设备在第三时间单元集合内的某个时间单元上接收到该历史周期性数据之后,由于该历史周期性数据为周期性数据,那么第一终端设备应该确定该历史周期性数据可能在哪些时间单元上发送,该哪些时间单元即为该历史周期性数据的预约时间单元。
其次,第一终端设备确定第四时间单元集合内所述历史周期性数据预约的至少一个时间单元。具体地,当该历史周期性数据的预约时间单元中的至少一个时间单元位于上述的第四时间单元集合时,第一终端设备应该将该至少一个时间单元从第四时间单元集合中确定出来,该至少一个时间单元称历史周期性数据预约的至少一个时间单元。最后,第一终端设备排除该第四时间单元集合内的与历史周期性数据预约的至少一个时间单元满足预设时间关系的时间单元,并从第四时间单元集合内剩余的时间单元中确定上述的第一时间单元。
其中,所述PSSCH在第三时间单元到达,所述第三时间单元集合包括所述第三时间单元之前的P个时间单元,所述P为正整数,所述第三时间单元集合为所述第一时间单元集合的子集,所述第四时间单元集合为所述第一时间单元集合的子集,所述第四时间单元集合中的起始时间单元晚于所述第三时间单元,所述P个时间单元从n’-P到n’-1连续编号;所述n'包括:所述第三时间单元为所述第一时间单元集合中的时间单元时,所述n'为所述第三时间单元在所述第一时间单元集合中的编号;或者,所述第三时间单元不为所述 第一时间单元集合中的时间单元时,所述n'为所述第三时间单元之后,第一个属于所述第一时间单元集合中的时间单元的编号。
一种可能的实现方式,上述P=P N×S symbol个时间单元,所述P N为正整数,S symbol表示所述一个帧结构周期内可用于侧行链路通信传输的时间单元数,所述P N×S symbol个时间单元从n’-P N×S symbol到n’-1连续编号,其中,P N的具体值可以是网络设备通过高层信令配置给第一终端设备的,还可以是协议预定义的,本申请对此并不限制。例如,高层信令指示P N为100,则第三时间单元集合中包括第三时间单元之前的100×S symbol个时间单元,其中,该100×S symbol个时间单元的编号从n'-100×S symbol到n'-1顺序排序。
另一种可能的实现方式,P为预配置的,或高层信令配置的,例如,协议规定P=200。
示例性地,上述的第三时间单元为一个系统帧内总的时间单元集合中的一个时间单元,该系统帧内总的时间单元集合中的时间单元按照时间先后顺序编号,第三时间单元的编号为n。例如,当本申请中的时间单元为符号时一个系统帧内总的时间单元集合中总的时间单元的个数为10240*14*W个,W为预设的子载波间隔对应的每个子帧内的时隙个数;当本申请中的时间单元为时隙时一个系统帧内总的时间单元集合中总的时间单元的个数为10240*W个,W为预设的子载波间隔对应的每个子帧内的时隙个数。该10240*14*W或10240*W个时间单元按照时间先后顺序编号,假设,第三时间单元为一个系统帧内总的时间单元集合中编号为10的时间单元。具体地,上述的第一时间单元集合为一个系统帧内总的时间单元集合中排除一些时间单元之后剩余的时间单元按照时间先后顺序编号得到的时间单元集合,假设,排除一个系统帧内总的时间单元集合中的部分时间单元得到第一时间单元集合时,一个系统帧内总的时间单元集合中的编号为0-10的时间单元中编号为0-5的时间单元被排除,那么当第三时间单元为第一时间单元集合中的时间单元时,第三时间单元在第一时间单元集合中的编号为4。
示例性地,上述的第四时间单元集合可以是与图5所示的子帧选择时间窗口类似。例如,第四时间单元集合可以是一个系统帧内窗口为[n+T 1,n+T 2]中属于第一时间单元集合中的时间单元构成的时间单元集合,其中,T 1≤4,20≤T 2≤100,n为上述第三时间单元的编号n。应理解,T 1和T 2的取值范围以及具体的取值为预配置的,或者,T 1和T 2的取值范围以及具体的取值为高层信令配置的,本申请对此并不限制。
进一步地,在第四时间单元集合内剩余的时间单元中选择第一时间单元可以是在剩余的时间单元中任意选择一个可用的时间单元作为第一时间单元;还可以是,计算剩余的时间单元每个时间单元为时域位置的时频资源能量的平均值,并选取平均能量较小时频资源的对应的时间单元作为第一时间单元。
示例性地,第一终端设备排除第四时间单元集合内的不可用于发送PSSCH的时间单元包括:
所述第一终端设备确定所述第三时间单元集合内的第四时间单元上所述第一终端设备发送的第一历史周期性数据;所述第一终端设备确定第四时间单元集合内所述第一历史周期性数据预约的至少一个时间单元。
可以理解,第一终端设备检测PSSCH到达之前的第三时间单元集合中的时间单元是否有用于发送该第一终端设备发送的第一历史周期性数据(非该周期性PSSCH)的时间 单元,那么可以推测该历史周期性数据预约的时间单元中的至少一个时间单元是否被包括在上述的第四时间单元集合中,如果至少一个时间单元包括在第四时间单元集合中,则第四时间单元集合中的与该至少一个时间单元满足第一预设时间关系的时间单元应该被排除。
具体地,所述第一预设时间关系为存在自然数j使得满足:
y+j×[S symbol×P rsvp_TX/N symbol]=z+q×[S symbol×P″ rsvp_TX/N symbol],其中,z+q×[S symbol×P″ rsvp_TX/N symbol]表示所述第一历史周期性数据预约的至少一个时间单元在所述第四时间单元集合中的位置,z为所述第四时间单元的编号,q为小于或者等于Q 1的正整数,y为与所述第一历史周期性数据预约的至少一个时间单元满足第一预设时间关系的时间单元的编号,j为小于或者等于C resel-1的自然数,C resel为所述PSSCH的预约个数,N symbol表示一个帧结构周期内的总的时间单元数,S symbol表示一个帧结构周期内可用于侧行链路通信传输的时间单元数,P rsvp_TX表示所述周期性数据的预约周期,所述周期性数据的预约周期的单位为时间单元,P” rsvp_TX表示所述第一历史周期性数据的预约周期,所述第一历史周期性数据的预约周期的单位为时间单元,当P” rsvp_TX/(K*N symbol)<1,且n'-z≤[S symbol×P″ rsvp_TX/N symbol]时,Q 1=K/(P” rsvp_TX/N symbol),否则,Q 1=1,其中,K为预配置的正整数,或者K为高层信令指示的正整数,或者K为动态指示的正整数,[]表示向下或向上取整运算。
编号为y的时间单元为第四时间单元集合内不可用于发送PSSCH的时间单元,理解为编号为y的时间单元对应的时频资源R x,y不可用于发送PSSCH,R x,y中的y表示时间单元的编号。具体地,R x,y为一块时频资源,该时频资源时域上为编号为y的时间单元,频域上为一段从x开始,长度为L的连续时频资源,具体地,x和L的值第一终端设备已知。例如,第一终端设备已知可用的时频资源一共有20个子信道,该20个子信道从0开始编号,一直编到19,并且第一终端设备已知L为2,那么该20个子信道可以划分为19个时频资源块,每个时频资源块由2个子信道组成,可以将子信道理解为时频资源的数量单位。
为了便于理解,下面以一个具体的例子说明上述公式指示的编号为y的时间单元被排除的情况:
假设,上述PSSCH到达的第三时间单元位于上述的第一时间单元集合中,且第三时间单元在第一时间单元集合中的编号为100,上述P=100,则第三时间单元集合中的时间单元从0到99连续编号,上述T1=1,T2=20,则第四时间单元集合中的时间单元从101到120连续编号。假设上述的第一历史周期性数据在第三时间单元集合中的编号为95的时间单元上发送,且第一历史周期性数据的预约周期P” rsvp_TX=30(时间单元),一个帧结构周期内可用于侧行链路通信传输的时间单元数S symbol=5,一个帧结构周期内的总的时间单元数N symbol=10,K=10,P” rsvp_TX/(K*N symbol)=1,所以Q 1=1,q=1,那么上述公式的右边值为110。
从第四时间单元集合中排除与第一历史周期性数据预约的至少一个时间单元满足第一预设时间关系的时间单元的时候,依次判断第四时间单元集合中的每一个时间单元是否满足上述的公式,假设PSSCH的预约个数C resel=10,PSSCH的预约周期P rsvp_TX=10(时间单元),则上述等式左边简化为y+5j,j=0、1、2、3…9。
也就是说,上述等式简化为y+5j=110。判断第四时间单元集合中的第一个时间单元是否满足该等式,第一个时间单元对应的y=101,没有存在的j使得y=101满足上述等式,所以第四时间单元集合中的第一个时间单元不应该被排除,同理,所以第四时间单元集合中的第二个时间单元不应该被排除,同理,第五个时间单元对应的y=105,存在j=1使得y=105满足上述等式,所以第四时间单元集合中的第五个时间单元应该被排除,同理,第十个时间单元对应的y=110,存在j=0使得y=110满足上述等式,所以第四时间单元集合中的第十个时间单元应该被排除等。
应理解,上述只是举例说明排除与第一历史周期性数据预约的至少一个时间单元满足第一预设时间关系的时间单元的过程,不对本申请构成任何限定,实际排除过程中,上述等式的右边的值可能与上述取值不同,等式左边的取值也可能与上述取值不同,这里不再一一举例说明。
第一终端设备排除第四时间单元集合内的不可用于发送PSSCH的时间单元还包括:
第一终端设备侦听到来自第二终端设备的侧行链路控制信息SCI,所述SCI用于指示所述第二终端设备的第二历史周期性数据;其中,第二终端设备并不特指某一个终端设备,可以指的是上述第一终端设备之外的其他的一个或多个终端设备,可以理解为上述的第一终端设备可以侦听其他的至少一个终端设备在上述的第三时间单元集合上是否发送过第二历史周期性数据,以及该第二历史周期性数据的预约时间单元是否被包括在上述的第四时间单元集合中。
第一终端设备对SCI进行译码,获得该第二历史周期性PSSCH的预约周期P rsvp_RX和优先级prio RX,P rsvp_RX和prio RX用于确定门限值Th prioTX,prioRX,所述第二终端设备为所述第一终端设备之外的终端设备;
所述终端设备确定所述第三时间单元集合内的第五时间单元上所述第二历史周期性数据的参考信号接收功率RSRP的测量结果大于所述Th prioTX,prioRX,所述第一终端设备确定第四时间单元集合内所述第二终端设备发送的第二历史周期性数据预约的至少一个时间单元。理解为编号为y’的时间单元对应的时频资源R x,y'不可用于发送PSSCH,所述x用于指示R x,y'的频域位置。
可以理解,第一终端设备检测周期性PSSCH到达之前的第三时间单元集合中的时间单元是否有用于其他终端设备发送的第二历史周期性数据的时间单元,那么可以推测该其他终端设备发送的第二历史周期性数据预约的时间单元中的至少一个时间单元是否被包括在上述的第四时间单元集合中,如果该至少一个时间单元被包括在第四时间单元集合中的话,则第四时间单元集合中的与该至少一个时间单元满足第二预设时间关系的时间单元应该被排除。
具体地,第二预设时间关系为存在自然数j使得满足:
y'+j×[S symbol×P rsvp_TX/N symbol]=z'+q×[S symbol×P rsvp_RX/N symbol],其中,z'+q×[S symbol×P rsvp_RX/N symbol]表示所述第二历史周期性数据预约的至少一个时间单元的编号,z’为第五时间单元的编号,q为小于或者等于Q 2的正整数,y’为与所述第二历史周期性数据预约的至少一个时间单元满足第二预设时间关系的时间单元的编号,j为小于或者等于C resel-1的自然数,C resel为所述PSSCH的预约个数,S symbol表示一个帧 结构周期内可用于侧行链路通信传输的时间单元数,N symbol表示一个帧结构周期内的总的时间单元数,P rsvp_TX表示所述周期性数据的预约周期,所述周期性数据的预约周期的单位为时间单元,P rsvp_RX表示所述第二历史周期性数据的预约周期,所述第二历史周期性数据的预约周期的单位为时间单元,[]表示向下或向上取整运算,当P rsvp_RX/(K*N symbol)<1,且n'-z'≤N symbol×P rsvp_RX时,Q 2=K/(P rsvp_RX/N symbol),其中,K为预配置的正整数,或者K为高层信令指示的正整数,或者K为动态指示的正整数;或者,Q 2=1。
如果存在j使得上述的等式成立,则编号为y’的时间单元对应的时频资源R x,y'不可用于发送PSSCH,R x,y'中的y’表示时间单元的编号。具体地,R x,y'为一块时频资源,该时频资源时域上为编号为y’的时间单元,频域上为一段从x开始,长度为L的连续时频资源。
本申请的技术方案在实际应用过程中,上述的第四时间单元集合内剩余的时间单元占用第四时间单元集合中总的时间单元数比率小于20%时,需要调整上述的门限值Th prioTX,prioRX的大小,直至第四时间单元集合内剩余的时间单元占用第四时间单元集合中总的时间单元数比率大于或等于20%。
为了便于理解,以一个具体的例子简单说明方案二中,第一终端设备如何获知使用第一时间单元传输PSSCH。
例如,在时间单元
Figure PCTCN2020086424-appb-000041
的起始时刻,第一终端设备持续监测第三时间单元集合
Figure PCTCN2020086424-appb-000042
内除了该第一终端设备自身发送过数据的时间单元,确定这些时间单元的预约情况,根据预约情况进行时间单元排除。
具体的时间单元排除原则如下所示:
1)假设该第一终端设备使用上述第三时间单元集合中的第四时间单元
Figure PCTCN2020086424-appb-000043
发送过数据,如果存在整数j满足y+j×[S symbol×P rsvp_TX/N symbol]=z+q×[S symbol×P″ rsvp_TX/N symbol],则编号为y的时间单元被排除,理解为编号为y的时间单元对应的资源R x,y不能用于传输PSSCH。这里P rsvp_TX表示该第一终端设备发送的PSSCH的预约周期,以时间单元为单位。N symbol表示某种帧结构配置下的单个帧结构周期内的总体时间单元数,S symbol表示在该种帧结构配置下单个帧结构周期内可用于sidelink传输的时间单元数。j为小于或者等于C resel-1的自然数,C resel表示预设的PSSCH的预约个数,为一个常数。P rsvp_TX表示所述周期性数据的预约周期,所述周期性数据的预约周期的单位为时间单元,P” rsvp_TX表示所述时间单元
Figure PCTCN2020086424-appb-000044
上发送的数据的预约周期,单位为时间单元,[]表示向下或向上取整运算,q=1,2,3…,Q 1。当P” rsvp_TX/(k*N symbol)<1并且n'-z≤[S symbol×P″ rsvp_TX/N symbol]时,Q 1=K/(P” rsvp_TX/N symbol),否则,Q 1=1。如果第一终端设备收到周期性PSSCH的时间单元属于时间单元集合
Figure PCTCN2020086424-appb-000045
Figure PCTCN2020086424-appb-000046
为该收到周期性PSSCH的时间单元,否则,
Figure PCTCN2020086424-appb-000047
为时间单元n之后,第一个属于时间单元集合
Figure PCTCN2020086424-appb-000048
的时间单元。
2)假设该第一终端设备获取到其他终端设备的SCI,并且译码该SCI,确定其他终端 设备传输的PSSCH的P rsvp_RX和prio RX,根据P rsvp_RX和prio RX确定门限Th prioTX,prioRX。如果其他终端设备传输的PSSCH的RSRP的测量结果大于门限Th prioTX,prioRX,并且存在整数j满足y'+j×[S symbol×P rsvp_TX/N symbol]=z'+q×[S symbol×P rsvp_RX/N symbol],则编号为y’的时间单元被排除,理解为编号为y’的时间单元对应的资源R x,y'不能用于传输PSSCH,其中,z’为其他终端设备发送数据的时间单元的编号。这里P rsvp_TX表示PSSCH的预约周期单位为时间单元,以时间单元为单位。N symbol表示某种帧结构配置下的单个帧结构周期内的总体时间单元数,S symbol表示在该种帧结构配置下单个帧结构周期内可用于sidelink传输的时间单元数。j为小于或者等于C resel-1的自然数,C resel表示PSSCH的预约个数,为一个常数。q=1,2,3…,Q 2。当P rsvp_RX/(k*N symbol)<1并且n'-z'≤N symbol×P rsvp_RX时,Q 2=K/(P rsvp_RX/N symbol),否则,Q 2=1。如果第一终端设备收到周期性PSSCH的时间单元属于时间单元集合
Figure PCTCN2020086424-appb-000049
Figure PCTCN2020086424-appb-000050
为该收到周期性PSSCH的时间单元,否则,
Figure PCTCN2020086424-appb-000051
为时间单元n之后,第一个属于时间单元集合
Figure PCTCN2020086424-appb-000052
的时间单元。
在第一终端设备确定第一时间单元集合中第一时间单元用于发送PSSCH之后,由于第一终端设备待传输的PSSCH为周期性地,则针对周期性地PSSCH传输,可以确定第一时间单元集合中第一时间单元之后的第二时间单元集合中用于发送PSSCH,即执行S130,第一终端设备确定第二时间单元集合,第二时间单元集合中的每个时间单元用于发送PSSCH。
具体地,第一终端设备根据第一时域间隔和预约个数N在所述第一时间单元集合中确定第二时间单元集合,所述第二时间单元集合中的时间单元用于发送所述PSSCH,其中,所述第二时间单元集合包括N-1个时间单元,所述第二时间单元集合中的第一个时间单元与所述第一时间单元之间的时域间隔为所述第一时域间隔,且所述第二时间单元集合中的任意相邻的两个时间单元之间的时域间隔为所述第一时域间隔,所述第二时间单元集合中的时间单元的编号大于所述第一时间单元的编号。
示例性地,对应上述的S121和S122所示的两种方案,第二时间单元集合中的时间单元与第一时间单元之间满足的时域间隔关系包括以下两种可能:
可能一:
所述第一终端设备从网络设备接收半静态调度SPS信息,所述SPS信息指示所述第一时间单元集合中的第一时间单元用于发送所述周期性数据,所述SPS信息中包括SPS的周期P SPS,所述P SPS用于确定所述第一时域间隔,其中,所述第一时域间隔P’ SPS表示为一个帧结构周期内可用于侧行链路通信传输的时间单元数S symbol与所述SPS的周期P SPS内包含的系统帧数的乘积;
所述第二时间单元集合中第M个时间单元与所述第一时间单元之间的时域间隔为M个所述第一时域间隔,其中,所述M为小于或者等于N-1的正整数。
所述周期P SPS内包含的系统帧数表示为所述周期P SPS与所述一个帧结构周期内的总的时间单元数N symbol的比值,则所述第一时域间隔P’ SPS表示为P’ SPS=[S symbol×P SPS/N symbol],[]表示向下或向上取整运算。
理解为第二时间单元集合中第M个时间单元与所述第一时间单元之间的时域间隔为M×P’ SPS。例如,第二时间单元集合中的第一个时间单元与所述第一时间单元之间的时域间隔为P’ SPS
为了便于理解,下面简单介绍可能一中第一时间单元与第二时间单元集合中的时间单元的编号之间的关系。
假设第一时间单元的编号为m,其中,m为自然数;
例如,当第一时间单元集合中的多个时间单元从编号为0开始以等差数列的公差为1按照时间顺序连续编号时,0≤m<max,max为第一时间单元集合中的总的时间单元的个数减1之后的值;
则第二时间单元集合中的第M个时间单元的编号与第一时间单元的编号m之间的关系为m+M×P’ SPS,0≤m+M×P’ SPS≤max,M为小于或者等于N-1正整数。
比较上述的第一时间单元与第二时间单元集合中的时间单元的编号之间的关系式,以及第二时间单元集合中的时间单元与所述第一时间单元之间的时域间隔关系式可知,由于第一时间单元集合中的多个时间单元按照时间顺序连续编号,第一时间单元后面的第二时间单元的编号为第一时间单元的编号与第一时间单元和第二时间单元之间的时域间隔之和。
下面,以一个具体的例子说明可能一中第二时间单元集合中的时间单元的编号与第一时间单元的编号之间的关系。
例如,当子载波间隔为60kHz时,如图9中第一行所示,图9是本申请实施例提供的一种帧结构示意图。具体地,图9第一行所示的帧结构,帧结构的周期长度为0.5ms,节选系统帧中的两个子帧为例进行说明,由于系统帧中的帧结构为周期性的,未示出的子帧与图9中示出的两个子帧类似。
进一步地,图9第一行所示的帧结构对应的第一时间单元集合如图9中的第二行所示,若S symbol=14,N symbol=28, PSPS=28,则P’ SPS=[14×28/28]=14。当第一时间单元的编号为0时,理解为第一时间单元为第一时间单元集合中的第0个时间单元,根据上述的第一时间单元与第二时间单元集合中的时间单元的编号之间的关系式为m+M×P’ SPS=0+1*14=14、m+M×P’ SPS=0+2*14=28…即第二时间单元集合中的第一个时间单元的编号为14,为第一时间单元集合中的第14个时间单元,第二时间单元集合中的第二个时间单元的编号为28,为第一时间单元集合中的第28个时间单元。图9中所示的第一时间单元集合中一共只包括28个时间单元,编号从0到27,所以图9所示的部分系统帧中,第二时间单元集合为第一时间单元集合中的第14个时间单元,编号为14。
但是,应理解图9只是一种举例,以系统帧中的两个子帧为例进行说明的,实际上可以有多个子帧。这里不再赘述。
可能二:
第一时域间隔P’ rsvp_TX表示为一个帧结构周期内可用于侧行链路通信传输的时间单元数S symbol与所述周期性数据的预约周期P rsvp_TX内包含的系统帧数的乘积,周期性数据的预约周期P rsvp_TX内包含的系统帧数表示为所述周期性数据的预约周期P rsvp_TX与所述一个帧结构周期内的总的时间单元数N symbo的比值,则所述第一时域间隔P’ rsvp_TX表示为 P’ rsvp_TX=[S symbol×P rsvp_TX/N symbol],[]表示向下或向上取整运算。第二时间单元集合中第M个时间单元与所述第一时间单元之间的时域间隔为M×P’ rsvp_TX,其中,所述M为小于或者等于N-1的正整数,所述预约个数N为PSSCH的预约个数。例如,第二时间单元集合中的第一个时间单元与所述第一时间单元之间的时域间隔为P’ rsvp_TX
为了便于理解,下面简单介绍可能二中第一时间单元与第二时间单元集合中的时间单元的编号之间的关系。
假设第一时间单元的编号为m,其中,m为自然数;
例如,当第一时间单元集合中的多个时间单元从编号为0开始以等差数列的公差为1按照时间顺序连续编号时,0≤m<max,max为第一时间单元集合中的总的时间单元的个数减1之后的值;
则第二时间单元集合中的第j个时间单元的编号与第一时间单元的编号m之间的关系为m+M×P’ rsvp_TX,0≤m+M×P' SPS≤max,M为小于或者等于C resel-1的自然数,C resel为预设PSSCH的预约个数,为一个常数。
具体地,PSSCH的预约周期表示第一终端设备两次传输PSSCH的间隔,而预设的PSSCH的预约个数表示第一终端设备一共预约需要周期传输的PSSCH的次数。
比较上述的第一时间单元与第二时间单元集合中的时间单元的编号之间的关系式,以及第二时间单元集合中的时间单元与所述第一时间单元之间的时域间隔关系式可知,由于第一时间单元集合中的多个时间单元按照时间顺序连续编号,第一时间单元后面的第二时间单元的编号为第一时间单元的编号与第一时间单元和第二时间单元之间的时域间隔之和。
下面,以一个具体的例子说明可能二中第二时间单元集合中的时间单元的编号与第一时间单元的编号之间的关系。
例如,当子载波间隔为60kHz时,如图9中第一行所示,图9是本申请实施例提供的一种帧结构示意图。具体地,图9第一行所示的帧结构,帧结构周期长度为0.5ms,节选系统帧中的两个子帧为例进行说明,由于系统帧中的帧结构为周期性的,未示出的子帧与图9中示出的两个子帧类似。
进一步地,图9第一行所示的帧结构中对应的第一时间单元集合如图10所示,图10是本申请实施例提供的一种时间单元集合示意图。若S symbol=14,N symbol=28,P rsvp_TX=14,则P’ rsvp_TX=[14×14/28]=7。当第一时间单元的编号为0时,理解为第一时间单元为第一时间单元集合中的第0个时间单元,根据上述的第一时间单元与第二时间单元集合中的时间单元的编号之间的关系为m+M×P’ rsvp_TX=0+1*7=7、m+M×P’ rsvp_TX=0+2*7=14…即第二时间单元集合中的第一个时间单元的编号为7,为第一时间单元集合中的第7个时间单元,以及第二时间单元集合中的第二个时间单元的编号为14,为第一时间单元集合中的第14个时间单元。
最后,第一终端设备可以在第一时间单元和第二时间单元集合中的时间单元上发送PSSCH。即执行S140,发送PSSCH。应理解,本申请中所示的在第一时间单元和第二时间单元集合中的时间单元上发送PSSCH指的是在时域位置为第一时间单元和第二时间单元集合中的时间单元的时频资源上发送PSSCH。
应理解上述方法实施例中的编号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定,而不应对本申请实施例的实施过程构成任何限定。
前文结合图8-图10详细介绍了本申请提供的通信方法,下面结合图11-图14详细介绍本申请中涉及的通信装置。
参见图11,图11是本申请提出的通信装置10的示意图。如图11所示,装置10包括发送单元110、处理单元120。通信装置10可以是上述方法实施例中的第一终端设备或第一终端设备内部的芯片或功能模块。
发送单元110,用于在所述第一时间单元和所述第二时间单元集合中的时间单元上发送所述周期性数据。
处理单元120,用于确定第一时间单元集合,所述第一时间单元集合中的时间单元可用于传输侧行链路业务数据、侧行链路控制信息和侧行链路反馈信息中的至少一种,其中,所述第一时间单元集合中包括多个时间单元,所述多个时间单元按照时间顺序连续编号
处理单元120,还用于确定待发送的周期性数据,所述周期性数据包括所述侧行链路业务数据、所述侧行链路控制信息和所述侧行链路反馈信息中的至少一种;
处理单元120,还用于确定所述第一时间单元集合中的第一时间单元,所述第一时间单元用于发送所述周期性数据、根据第一时域间隔和预约个数N在所述第一时间单元集合中确定第二时间单元集合,所述第二时间单元集合中的时间单元用于发送所述周期性数据,其中,所述第二时间单元集合包括N-1个时间单元,所述第二时间单元集合中的第一个时间单元与所述第一时间单元之间的时域间隔为所述第一时域间隔,且所述第二时间单元集合中的任意相邻的两个时间单元之间的时域间隔为所述第一时域间隔,所述第二时间单元集合中的时间单元的编号大于所述第一时间单元的编号。
装置10和方法实施例中的第一终端设备完全对应,装置10的相应单元用于执行图8所示的方法实施例中由第一终端设备执行的相应步骤。
其中,装置10中的发送单元110执行方法实施例中发送的步骤。例如,执行图8中的S140,在第一时间单元和第二时间单元集合中的时间单元上发送周期性数据。处理单元120执行方法实施例中第一终端设备内部实现或处理的步骤。例如,执行图8中的S110,确定第一时间单元集合、执行图8中的S111,确定待发送的周期性数据、执行图8中的S120,确定第一时间单元以及执行图8中的S130,确定第二时间单元集合。
可选地,装置10还可以包括接收单元130,用于接收其他设备发送的信息。例如,执行图8中的S121,接收网络设备发送的SPS信息。发送单元110和接收单元130可以组成收发单元,同时具有接收和发送的功能。其中,处理单元120可以是处理器。发送单元110可以是接收器。接收单元130可以是发射器。接收器和发射器可以集成在一起组成收发器。
示例性地,装置10为上述的方法实施例中的终端设备的情况下,发送单元110和接收单元130可以是终端设备的天线以及输入输出装置、处理单元120可以是终端设备的处理器;装置10为上述的方法实施例中的终端设备中的芯片的情况下,发送单元110和接收单元110可以是芯片上的输入输出电路、处理单元120可以是芯片上的处理器;装置10为上述的方法实施例中的终端设备中的功能模块的情况下,发送单元110可以是发送功能模块、接收单元110可以是接收功能模块、处理单元120可以是处理功能模块。
参见图12,图12是适用于本申请实施例的第一终端设备20的结构示意图。该第一终端设备20可应用于图1所示出的系统中。为了便于说明,图12仅示出了第一终端设备的主要部件。如图12所示,第一终端设备20包括处理器、存储器、控制电路、天线以及输入输出装置。处理器用于控制天线以及输入输出装置收发信号,存储器用于存储计算机程序,处理器用于从存储器中调用并运行该计算机程序,以执行本申请提出的通信方法中由第一终端设备执行的相应流程和/或操作。此处不再赘述。
本领域技术人员可以理解,为了便于说明,图12仅示出了一个存储器和处理器。在实际的第一终端设备中,可以存在多个处理器和存储器。存储器也可以称为存储介质或者存储设备等,本申请实施例对此不做限制。
参见图13,图13是本申请提出的通信装置30的示意图。如图13所示,装置30包括发送单元310以及处理单元320。通信装置30可以是上述方法实施例中的网络设备或网络设备内部的芯片或功能模块。
处理单元320,用于确定半静态调度SPS信息,所述SPS信息用于指示第一终端设备可以通过第一时间单元集合中的第一时间单元发送周期性数据,
其中,所述SPS信息中包括SPS的周期P SPS,所述P SPS用于确定第一时域间隔P’ SPS=[S symbol×P SPS/N symbol],N symbol表示预设的帧结构配置下的一个帧结构周期内的总的时间单元数,S symbol表示所述一个帧结构周期内可用于侧行链路通信传输的时间单元数,[]表示向下或向上取整运算,所述第一时间单元集合中的时间单元可用于传输侧行链路业务数据、侧行链路控制信息和侧行链路反馈信息中的至少一种,所述第一时间单元集合中包括多个时间单元,所述多个时间单元按照时间顺序连续编号,
所述第一时域间隔和预约个数N用于在所述第一时间单元集合中确定第二时间单元集合,所述第二时间单元集合中的时间单元用于所述第一终端设备发送所述周期性数据,所述第二时间单元集合包括N-1个时间单元,所述第二时间单元集合中的第一个时间单元与所述第一时间单元之间的时域间隔为所述第一时域间隔,且所述第二时间单元集合中的任意相邻的两个时间单元之间的时域间隔为所述第一时域间隔,所述第二时间单元集合中的时间单元的编号大于所述第一时间单元的编号;
发送单元310,用于向第一终端设备发送SPS信息。
装置30和方法实施例中的网络设备完全对应,装置30的相应单元用于执行图8所示的方法实施例中由网络设备执行的相应步骤。
其中,装置30中的发送单元310执行方法实施例中网络设备发送的步骤。例如,执行图8中向第一终端设备发送SPS信息的步骤121。处理单元120执行方法实施例中网络设备内部实现或处理的步骤。例如,执行图8中确定SPS信息的步骤123。
可选地,装置30还可以包括接收单元330,用于接收其他设备发送信息。接收单元330和发送单元310可以组成收发单元,同时具有接收和发送的功能。其中,处理单元320可以是处理器。发送单元310可以是接收器。接收单元330可以是发射器。接收器和发射器可以集成在一起组成收发器。
示例性地,装置30为上述的方法实施例中的网络设备的情况下,发送单元310和接收单元330可以是网络设备的远端射频单元(remote radio unit,RRU)、处理单元320可以是网络设备的基带单元(base band unit,BBU);装置30为上述的方法实施例中的网 络设备中的芯片的情况下,发送单元310和接收单元330可以是芯片上的输入输出电路、处理单元320可以是芯片上的处理器;装置30为上述的方法实施例中的网络设备中的功能模块的情况下,发送单元310可以是发送功能模块、接收单元330可以是接收功能模块、处理单元320可以是处理功能模块。
参见图14,图14是适用于本申请实施例的网络设备40的结构示意图,可以用于实现上述通信方法中的网络设备的功能。如可以为基站的结构示意图。如图14所示,该网络设备可应用于如图1所示的系统中。
网络设备40可以包括一个或多个射频单元,如RRU401和一个或多个BBU。基带单元也可称为数字单元(digital unit,DU)402。所述RRU 401可以称为收发单元,与图13中的发送单元310对应。可选地,该收发单元401还可以称为收发机、收发电路、或者收发器等,其可以包括至少一个天线4011和射频单元4012。可选地,收发单元401可以包括接收单元和发送单元,接收单元可以对应于接收器(或称接收机、接收电路),发送单元可以对应于发射器(或称发射机、发射电路)。所述RRU 401部分主要用于射频信号的收发以及射频信号与基带信号的转换,例如,用于向第一终端设备发送上述实施例中所述的控制信息。所述BBU 402部分主要用于进行基带处理,对基站进行控制等。所述RRU401与BBU 402可以是物理上设置在一起,也可以物理上分离设置的,即分布式基站。
所述BBU 402为网络设备的控制中心,也可以称为处理单元,可以与图13中的处理单元320对应,主要用于完成基带处理功能,如信道编码,复用,调制,扩频等。例如该BBU(处理单元)402可以用于控制网络设备40执行上述方法实施例中关于网络设备的操作流程,例如,确定承载第一终端设备的控制信息的时间单元的长度。
在一个示例中,所述BBU 402可以由一个或多个单板构成,多个单板可以共同支持单一接入制式的无线接入网(如,LTE系统,或5G系统),也可以分别支持不同接入制式的无线接入网。所述BBU 402还包括存储器4021和处理器4022。所述存储器4021用以存储必要的指令和数据。例如存储器4021存储上述实施例中的码本等。所述处理器4022用于控制基站进行必要的动作,例如用于控制基站执行上述方法实施例中关于网络设备的操作流程。所述存储器4021和处理器4022可以服务于一个或多个单板。也就是说,可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
应理解,图14所示的网络设备40能够实现图8-图10的方法实施例中涉及的网络设备功能。网络设备40中的各个单元的操作和/或功能,分别为了实现本申请方法实施例中由网络设备执行的相应流程。为避免重复,此处适当省略详述描述。图14示例的网络设备的结构仅为一种可能的形态,而不应对本申请实施例构成任何限定。本申请并不排除未来可能出现的其他形态的网络设备结构的可能。
本申请实施例还提供一种通信系统,其包括前述的网络设备和一个或多个第一终端设备。
本申请还提供了一种计算机可读存储介质,该计算机可读存储介质中存储有指令,当该指令在计算机上运行时,使得计算机执行上述如图8-图10所示的方法中网络设备执行的各个步骤。
本申请还提供了一种计算机可读存储介质,该计算机可读存储介质中存储有指令,当 该指令在计算机上运行时,使得计算机执行上述如图8-图10所示的方法中第一终端设备执行的各个步骤。
本申请还提供了一种包含指令的计算机程序产品,当该计算机程序产品在计算机上运行时,使得计算机执行如图8-图10所示的方法中网络设备执行的各个步骤。
本申请还提供了一种包含指令的计算机程序产品,当该计算机程序产品在计算机上运行时,使得计算机执行如图8-图10所示的方法中第一终端设备执行的各个步骤。
本申请还提供一种芯片,包括处理器。该处理器用于读取并运行存储器中存储的计算机程序,以执行本申请提供的通信方法中由第一终端设备执行的相应操作和/或流程。可选地,该芯片还包括存储器,该存储器与该处理器通过电路或电线与存储器连接,处理器用于读取并执行该存储器中的计算机程序。进一步可选地,该芯片还包括通信接口,处理器与该通信接口连接。通信接口用于接收需要处理的数据和/或信息,处理器从该通信接口获取该数据和/或信息,并对该数据和/或信息进行处理。该通信接口可以是输入输出接口。
本申请还提供一种装置,装置可以是通信芯片或包含通信芯片的集成模块,包括处理器。该处理器用于调用并运行存储器中存储的计算机程序,以执行本申请提供的通信方法中由网络设备执行的相应操作和/或流程。可选地,该芯片还包括存储器,该存储器与该处理器通过电路或电线与存储器连接,处理器用于读取并执行该存储器中的计算机程序。进一步可选地,该芯片还包括通信接口,处理器与该通信接口连接。通信接口用于接收需要处理的数据和/或信息,处理器从该通信接口获取该数据和/或信息,并对该数据和/或信息进行处理。该通信接口可以是输入输出接口。
以上各实施例中,处理器可以为中央处理器(central processing unit,CPU)、微处理器、特定应用集成电路(application-specific integrated circuit,ASIC),或一个或多个用于控制本申请技术方案程序执行的集成电路等。例如,处理器可以是数字信号处理器设备、微处理器设备、模数转换器、数模转换器等。处理器可以根据这些设备各自的功能而在这些设备之间分配终端设备或网络设备的控制和信号处理的功能。此外,处理器可以具有操作一个或多个软件程序的功能,软件程序可以存储在存储器中。处理器的所述功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。
存储器可以是只读存储器(read-only memory,ROM)、可存储静态信息和指令的其它类型的静态存储设备、随机存取存储器(random access memory,RAM)或可存储信息和指令的其它类型的动态存储设备,也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory,EEPROM)、只读光盘(compact disc read-only memory,CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其它磁存储设备,或者还可以是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其它介质等。
可选的,上述实施例中涉及的存储器与存储器可以是物理上相互独立的单元,或者,存储器也可以和处理器集成在一起。
本申请实施例中,“至少一个”是指一个或者多个,“多个”是指两个或两个以上。“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示单 独存在A、同时存在A和B、单独存在B的情况。其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项”及其类似表达,是指的这些项中的任意组合,包括单项或复数项的任意组合。例如,a,b和c中的至少一项可以表示:a,b,c,a-b,a-c,b-c,或a-b-c,其中a,b,c可以是单个,也可以是多个。
本领域普通技术人员可以意识到,本文中公开的实施例中描述的各单元及算法步骤,能够以电子硬件、计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元也可以不是物理上分开的,作为单元显示的部件也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本申请技术方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(read-only memory,ROM)、随机存取存储器(random access memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本申请的具体实施方式,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。本申请的保护范围应以所述权利要求的保护范围为准。

Claims (32)

  1. 一种通信方法,其特征在于,包括:
    第一终端设备确定第一时间单元集合,所述第一时间单元集合中的时间单元可用于传输侧行链路业务数据、侧行链路控制信息和侧行链路反馈信息中的至少一种,其中,所述第一时间单元集合中包括多个时间单元,所述多个时间单元按照时间顺序连续编号,所述时间单元包括符号或时隙;
    所述第一终端设备确定待发送的周期性数据,所述周期性数据包括所述侧行链路业务数据、所述侧行链路控制信息和所述侧行链路反馈信息中的至少一种;
    所述第一终端设备确定所述第一时间单元集合中的第一时间单元,所述第一时间单元用于发送所述周期性数据;
    所述第一终端设备根据第一时域间隔和预约个数N在所述第一时间单元集合中确定第二时间单元集合,所述第二时间单元集合中的时间单元用于发送所述周期性数据,其中,所述第二时间单元集合中包括N-1个时间单元,所述第二时间单元集合中的第一个时间单元与所述第一时间单元之间的时域间隔为所述第一时域间隔,且所述第二时间单元集合中的任意相邻的两个时间单元之间的时域间隔为所述第一时域间隔,所述第二时间单元集合中的时间单元的编号大于所述第一时间单元的编号;
    所述第一终端设备在所述第一时间单元和所述第二时间单元集合中的时间单元上发送所述周期性数据。
  2. 根据权利要求1所述的通信方法,其特征在于,所述第一终端设备确定所述第一时间单元集合中的第一时间单元包括:
    所述第一终端设备从网络设备接收半静态调度SPS信息,所述SPS信息指示所述第一时间单元集合中的第一时间单元用于发送所述周期性数据,所述SPS信息中包括SPS的周期P SPS,所述P SPS用于确定所述第一时域间隔,其中,所述第一时域间隔P’ SPS表示为一个帧结构周期内可用于侧行链路通信传输的时间单元数S symbol与所述SPS的周期P SPS内包含的系统帧数的乘积;
    所述第二时间单元集合中第M个时间单元与所述第一时间单元之间的时域间隔为M个所述第一时域间隔,其中,所述M为小于或者等于N-1的正整数。
  3. 根据权利要求2所述的通信方法,其特征在于,所述周期P SPS内包含的系统帧数表示为所述周期P SPS与所述一个帧结构周期内的总的时间单元数N symbol的比值,则所述第一时域间隔P’ SPS表示为P’ SPS=[S symbol×P SPS/N symbol],[]表示向下或向上取整运算。
  4. 根据权利要求1所述的通信方法,其特征在于,所述第一终端设备确定所述第一时间单元集合中的第一时间单元包括:
    所述第一终端设备确定第三时间单元集合内发送的历史周期性数据;
    所述第一终端设备确定第四时间单元集合内所述历史周期性数据预约的至少一个时间单元;
    所述第一终端设备从剩余的时间单元中确定所述第一时间单元,其中,所述剩余的时间单元为所述第四时间单元集合中排除与所述历史周期性数据预约的至少一个时间单元 满足预设时间关系的时间单元之后剩余的时间单元,
    其中,所述周期性数据在第三时间单元到达,所述第三时间单元集合包括所述第三时间单元之前的P个时间单元,所述P为正整数,所述第三时间单元集合为所述第一时间单元集合的子集,所述第四时间单元集合为所述第一时间单元集合的子集,所述第四时间单元集合中的起始时间单元晚于所述第三时间单元,所述P个时间单元从n’-P到n’-1连续编号;
    所述n'包括:
    所述第三时间单元为所述第一时间单元集合中的时间单元时,所述n'为所述第三时间单元在所述第一时间单元集合中的编号;或者,
    所述第三时间单元不为所述第一时间单元集合中的时间单元时,所述n'为所述第三时间单元之后,第一个属于所述第一时间单元集合中的时间单元的编号。
  5. 根据权利要求4所述的通信方法,其特征在于,所述第一终端设备确定第三时间单元集合内发送的历史周期性数据,包括:
    所述第一终端设备确定所述第三时间单元集合内的第四时间单元上所述第一终端设备发送的第一历史周期性数据;
    所述第一终端设备确定第四时间单元集合内所述历史周期性数据预约的至少一个时间单元包括:
    所述第一终端设备确定第四时间单元集合内所述第一历史周期性数据预约的至少一个时间单元。
  6. 根据权利要求5所述的通信方法,其特征在于,所述剩余的时间单元包括:
    所述第四时间单元集合中排除与所述第一历史周期性数据预约的至少一个时间单元满足第一预设时间关系的时间单元;
    其中,所述第一预设时间关系为存在自然数j使得满足:
    y+j×[S symbol×P rsvp_TX/N symbol]=z+q×[S symbol×P″ rsvp_TX/N symbol],
    其中,z+q×[S symbol×P″ rsvp_TX/N symbol]表示所述第一历史周期性数据预约的至少一个时间单元的编号,z为所述第四时间单元的编号,q为小于或者等于Q1的正整数,y为与所述第一历史周期性数据预约的至少一个时间单元满足第一预设时间关系的时间单元的编号,j为小于或者等于C resel-1的自然数,C resel为所述周期性数据的预约个数,N symbol表示一个帧结构周期内的总的时间单元数,S symbol表示一个帧结构周期内可用于侧行链路通信传输的时间单元数,P rsvp_TX表示所述周期性数据的预约周期,所述周期性数据的预约周期的单位为时间单元,P” rsvp_TX表示所述第一历史周期性数据的预约周期,所述第一历史周期性数据的预约周期的单位为时间单元,[]表示向下或向上取整运算。
  7. 根据权利要求6所述的通信方法,其特征在于,当P” rsvp_TX/(K*N symbol)<1,且n'-z≤[S symbol×P″ rsvp_TX/N symbol]时,Q 1=K/(P” rsvp_TX/N symbol),否则,Q 1=1,其中,K为正整数。
  8. 根据权利要求4-7中任一项所述的通信方法,其特征在于,所述第一终端设备确定第三时间单元集合内发送的历史周期性数据,包括:
    所述第一终端设备侦听到来自第二终端设备的侧行链路控制信息SCI,所述SCI用于指示所述第二终端设备的第二历史周期性数据;
    所述第一终端设备对所述SCI进行译码,获得所述第二历史周期性数据的周期P rsvp_RX和优先级prio RX,所述P rsvp_RX和prio RX用于确定门限值Th prioTX,prioRX,所述第二终端设备为所述第一终端设备之外的终端设备;
    所述第一终端设备确定第四时间单元集合内所述历史周期性数据预约的至少一个时间单元包括:
    所述第一终端设备确定所述第三时间单元集合内的第五时间单元上所述第二历史周期性数据的参考信号接收功率RSRP的测量结果大于所述Th prioTX,prioRX,所述第一终端设备确定第四时间单元集合内所述第二历史周期性数据预约的至少一个时间单元。
  9. 根据权利要求8所述的通信方法,其特征在于,所述剩余的时间单元包括:
    所述第四时间单元集合中排除与所述第二历史周期性数据预约的至少一个时间单元满足第二预设时间关系的时间单元;
    其中,所述第二预设时间关系为存在自然数j使得满足:
    y'+j×[S symbol×P rsvp_TX/N symbol]=z'+q×[S symbol×P rsvp_RX/N symbol],
    其中,z'+q×[S symbol×P rsvp_RX/N symbol]表示所述第二历史周期性数据预约的至少一个时间单元的编号,z’为所述第五时间单元的编号,q为小于或者等于Q 2的正整数,y’为与所述第二历史周期性数据预约的至少一个时间单元满足第二预设时间关系的时间单元的编号,j为小于或者等于C resel-1的自然数,C resel为所述周期性数据的预约个数,S symbol表示一个帧结构周期内可用于侧行链路通信传输的时间单元数,N symbo表示一个帧结构周期内的总的时间单元数,P rsvp_TX表示所述周期性数据的预约周期,所述周期性数据的预约周期的单位为时间单元,P rsvp_RX表示所述第二历史周期性数据的预约周期,所述第二历史周期性数据的预约周期的单位为时间单元,[]表示向下或向上取整运算。
  10. 根据权利要求9所述的通信方法,其特征在于,当P rsvp_RX/(K*N symbol)<1,且n'-z'≤N symbol×P rsvp_RX时,Q 2=K/(P rsvp_RX/N symbol),否则,Q 2=1,其中,K为正整数。
  11. 根据权利要求4-10中任一项所述的通信方法,其特征在于,
    所述第一时域间隔P’ rsvp_TX表示为一个帧结构周期内可用于侧行链路通信传输的时间单元数S symbol与所述周期性数据的预约周期P rsvp_TX内包含的系统帧数的乘积;
    所述第二时间单元集合中第M个时间单元与所述第一时间单元之间的时域间隔为M个所述第一时域间隔,其中,所述M为小于或者等于N-1的正整数。
  12. 根据权利要求11所述的通信方法,其特征在于,所述周期性数据的预约周期P rsvp_TX内包含的系统帧数表示为所述周期性数据的预约周期P rsvp_TX与所述一个帧结构周期内的总的时间单元数N symbol的比值,则所述第一时域间隔P’ rsvp_TX表示为P’ rsvp_TX=[S symbol×P rsvp_TX/N symbol],[]表示向下或向上取整运算。
  13. 一种通信方法,其特征在于,包括:
    网络设备确定半静态调度SPS信息,所述SPS信息用于指示第一终端设备可以通过 第一时间单元集合中的第一时间单元发送周期性数据,
    其中,所述SPS信息中包括SPS的周期P SPS,所述P SPS用于确定第一时域间隔,所述第一时域间隔P’ SPS表示为一个帧结构周期内可用于侧行链路通信传输的时间单元数S symbol与所述SPS的周期P SPS内包含的系统帧数的乘积;
    所述第一时间单元集合中的时间单元可用于传输侧行链路业务数据、侧行链路控制信息和侧行链路反馈信息中的至少一种,所述第一时间单元集合中包括多个时间单元,所述多个时间单元按照时间顺序连续编号,
    所述第一时域间隔和预约个数N用于在所述第一时间单元集合中确定第二时间单元集合,所述第二时间单元集合中的时间单元用于所述第一终端设备发送所述周期性数据,所述第二时间单元集合包括N-1个时间单元,所述第二时间单元集合中的第一个时间单元与所述第一时间单元之间的时域间隔为所述第一时域间隔,且所述第二时间单元集合中的任意相邻的两个时间单元之间的时域间隔为所述第一时域间隔,所述第二时间单元集合中的时间单元的编号大于所述第一时间单元的编号;
    所述网络设备向所述第一终端设备发送所述SPS信息。
  14. 根据权利要求13所述的通信方法,其特征在于,所述周期P SPS内包含的系统帧数表示为所述周期P SPS与所述一个帧结构周期内的总的时间单元数N symbol的比值,则所述第一时域间隔P’ SPS表示为P’ SPS=[S symbol×P SPS/N symbol],[]表示向下或向上取整运算。
  15. 根据权利要求13或14所述的通信方法,其特征在于,
    所述第二时间单元集合中第M个时间单元与所述第一时间单元之间的时域间隔为M个所述第一时域间隔,其中,所述M为小于或者等于N-1的正整数。
  16. 一种通信装置,其特征在于,包括:
    处理单元,用于确定第一时间单元集合,所述第一时间单元集合中的时间单元可用于传输侧行链路业务数据、侧行链路控制信息和侧行链路反馈信息中的至少一种,其中,所述第一时间单元集合中包括多个时间单元,所述多个时间单元按照时间顺序连续编号;
    所述处理单元,还用于确定待发送的周期性数据,所述周期性数据包括所述侧行链路业务数据、所述侧行链路控制信息和所述侧行链路反馈信息中的至少一种;
    所述处理单元,还用于确定所述第一时间单元集合中的第一时间单元,所述第一时间单元用于发送所述周期性数据;
    所述处理单元,还用于根据第一时域间隔和预约个数N在所述第一时间单元集合中确定第二时间单元集合,所述第二时间单元集合中的时间单元用于发送所述周期性数据,其中,所述第二时间单元集合包括N-1个时间单元,所述第二时间单元集合中的第一个时间单元与所述第一时间单元之间的时域间隔为所述第一时域间隔,且所述第二时间单元集合中的任意相邻的两个时间单元之间的时域间隔为所述第一时域间隔,所述第二时间单元集合中的时间单元的编号大于所述第一时间单元的编号;
    发送单元,用于在所述第一时间单元和所述第二时间单元集合中的时间单元上发送所述周期性数据。
  17. 根据权利要求16所述的通信装置,其特征在于,所述通信装置还包括:
    接收单元,用于从网络设备接收半静态调度SPS信息,所述SPS信息指示所述第一 时间单元集合中的第一时间单元用于发送所述周期性数据,其中,所述SPS信息中包括SPS的周期P SPS,所述P SPS用于确定所述第一时域间隔,其中,所述第一时域间隔P’ SPS表示为一个帧结构周期内可用于侧行链路通信传输的时间单元数S symbol与所述SPS的周期P SPS内包含的系统帧数的乘积;
    所述第二时间单元集合中第M个时间单元与所述第一时间单元之间的时域间隔为M个所述第一时域间隔,其中,所述M为小于或者等于N-1的正整数。
  18. 根据权利要求17所述的通信装置,其特征在于,所述周期P SPS内包含的系统帧数表示为所述周期P SPS与所述一个帧结构周期内的总的时间单元数N symbol的比值,则所述第一时域间隔P’ SPS表示为P’ SPS=[S symbol×P SPS/N symbol],[]表示向下或向上取整运算。
  19. 根据权利要求16所述的通信装置,其特征在于,所述处理单元确定所述第一时间单元集合中的第一时间单元包括:
    所述处理单元确定第三时间单元集合内发送的历史周期性数据;
    所述处理单元确定第四时间单元集合内所述历史周期性数据预约的至少一个时间单元;
    所述处理单元从剩余的时间单元中确定所述第一时间单元,其中,所述剩余的时间单元为所述第四时间单元集合中排除与所述历史周期性数据预约的至少一个时间单元满足预设时间关系的时间单元之后剩余的时间单元,
    其中,所述周期性数据在第三时间单元到达,所述第三时间单元集合中包括所述第三时间单元之前的P个时间单元,所述P为正整数,所述第三时间单元集合为所述第一时间单元集合的子集,所述第四时间单元集合为所述第一时间单元集合的子集,所述第四时间单元集合中的起始时间单元晚于所述第三时间单元,所述P个时间单元从n’-P到n’-1连续编号;
    所述n'包括:
    所述第三时间单元为所述第一时间单元集合中的时间单元时,所述n'为所述第三时间单元在所述第一时间单元集合中的编号;或者,
    所述第三时间单元不为所述第一时间单元集合中的时间单元时,所述n'为所述第三时间单元之后,第一个属于所述第一时间单元集合中的时间单元的编号。
  20. 根据权利要求19所述的通信装置,其特征在于,所述处理单元确定第三时间单元集合内发送的历史周期性数据包括:
    所述处理单元确定所述第三时间单元集合内的第四时间单元上所述发送单元发送的第一历史周期性数据;
    所述处理单元确定第四时间单元集合内所述历史周期性数据预约的至少一个时间单元包括:
    所述处理单元确定第四时间单元集合内所述第一历史周期性数据预约的至少一个时间单元。
  21. 根据权利要求20所述的通信装置,其特征在于,所述剩余的时间单元包括:
    所述第四时间单元集合中排除与所述第一历史周期性数据预约的至少一个时间单元满足第一预设时间关系的时间单元;
    其中,所述第一预设时间关系为存在自然数j使得满足:
    y+j×[S symbol×P rsvp_TX/N symbol]=z+q×[S symbol×P″ rsvp_TX/N symbol],
    其中,z+q×[S symbol×P″ rsvp_TX/N symbol]表示所述第一历史周期性数据预约的至少一个时间单元的编号,z为所述第四时间单元的编号,q为小于或者等于Q 1的正整数,y为与所述第一历史周期性数据预约的至少一个时间单元满足第一预设时间关系的时间单元的编号,j为小于或者等于C resel-1的自然数,C resel为所述周期性数据的预约个数,S symbol表示一个帧结构周期内可用于侧行链路通信传输的时间单元数,N symbol表示一个帧结构周期内的总的时间单元数,P rsvp_TX表示所述周期性数据的预约周期,所述周期性数据的预约周期的单位为时间单元,P” rsvp_TX表示所述第一历史周期性数据的预约周期,所述第一历史周期性数据的预约周期的单位为时间单元,[]表示向下或向上取整运算。
  22. 根据权利要求21所述的通信装置,其特征在于,当P” rsvp_TX/(K*N symbol)<1,且n'-z≤[S symbol×P″ rsvp_TX/N symbol]时,Q 1=K/(P” rsvp_TX/N symbol),否则,Q 1=1,其中,K为正整数。
  23. 根据权利要求19-22中任一项所述的通信装置,其特征在于,所述处理单元确定第三时间单元集合内发送的历史周期性数据包括:所述接收单元侦听到来自第二终端设备的侧行链路控制信息SCI,所述SCI用于指示所述第二终端设备的第二历史周期性数据;
    所述处理单元对所述SCI进行译码,获得所述第二历史周期性数据的预约周期P rsvp_RX和优先级prio RX,所述P rsvp_RX和prio RX用于确定门限值Th prioTX,prioRX,所述第二终端设备为所述第一终端设备之外的任意一个终端设备;
    所述处理单元确定第四时间单元集合内所述历史周期性数据预约的至少一个时间单元包括:
    所述处理单元确定所述第三时间单元集合内的第五时间单元上所述第二历史周期性数据的参考信号接收功率RSRP的测量结果大于所述Th prioTX,prioRX,所述第一终端设备确定第四时间单元集合内所述第二历史周期性数据预约的至少一个时间单元。
  24. 根据权利要求23所述的通信装置,其特征在于,所述剩余的时间单元包括:
    所述第四时间单元集合中排除与所述第二历史周期性数据预约的至少一个时间单元满足第二预设时间关系的时间单元;
    其中,所述第二预设时间关系为存在自然数j使得满足:
    y'+j×[S symbol×P rsvp_TX/N symbol]=z'+q×[S symbol×P rsvp_RX/N symbol],
    其中,z'+q×[S symbol×P rsvp_RX/N symbol]表示所述第二历史周期性数据预约的至少一个时间单元的编号,z’为所述第五时间单元的编号,q为小于或者等于Q 2的正整数,y’为与所述第二历史周期性数据预约的至少一个时间单元满足第二预设时间关系的时间单元的编号,j为小于或者等于C resel-1的自然数,C resel为所述周期性数据的预约个数,S symbol表示一个帧结构周期内可用于侧行链路通信传输的时间单元数,N symbol表示一个帧结构周期内的总的时间单元数,P rsvp_TX表示所述周期性数据的预约周期,所述周期性数据的预约周期的单位为时间单元,P rsvp_RX表示所述第二历史周期性数据的预约周期,所述第 二历史周期性数据的预约周期的单位为时间单元,[]表示向下或向上取整运算。
  25. 根据权利要求24所述的通信装置,其特征在于,当P rsvp_RX/(K*N symbol)<1,且n'-z'≤N symbol×P rsvp_RX时,Q 2=K/(P rsvp_RX/N symbol),否则,Q 2=1,其中,K为正整数。
  26. 根据权利要求19-25中任一项所述的通信装置,其特征在于,所述第一时域间隔P’ rsvp_TX表示为一个帧结构周期内可用于侧行链路通信传输的时间单元数S symbol与所述周期性数据的预约周期P rsvp_TX内包含的系统帧数的乘积;
    所述第二时间单元集合中第M个时间单元与所述第一时间单元之间的时域间隔为M个所述第一时域间隔,其中,所述M为小于或者等于N-1的正整数。
  27. 根据权利要求26所述的通信装置,其特征在于,所述周期性数据的预约周期P rsvp_TX内包含的系统帧数表示为所述周期性数据的预约周期P rsvp_TX与所述一个帧结构周期内的总的时间单元数N symbol的比值,则所述第一时域间隔P’ rsvp_TX表示为P’ rsvp_TX=[S symbol×P rsvp_TX/N symbol],[]表示向下或向上取整运算。
  28. 一种通信装置,其特征在于,包括:
    处理单元,用于确定半静态调度SPS信息,所述SPS信息用于指示第一终端设备可以通过第一时间单元集合中的第一时间单元发送周期性数据,
    其中,所述SPS信息中包括SPS的周期P SPS,所述P SPS用于确定第一时域间隔,所述第一时域间隔P’ SPS表示为一个帧结构周期内可用于侧行链路通信传输的时间单元数S symbol与所述SPS的周期P SPS内包含的系统帧数的乘积;
    所述第一时域间隔和预约个数N用于在所述第一时间单元集合中确定第二时间单元集合,所述第二时间单元集合中的时间单元用于所述第一终端设备发送所述周期性数据,所述第二时间单元集合包括N-1个时间单元,所述第二时间单元集合中的第一个时间单元与所述第一时间单元之间的时域间隔为所述第一时域间隔,且所述第二时间单元集合中的任意相邻的两个时间单元之间的时域间隔为所述第一时域间隔,所述第二时间单元集合中的时间单元的编号大于所述第一时间单元的编号;
    发送单元,用于向所述第一终端设备发送所述SPS信息。
  29. 根据权利要求28所述的通信装置,其特征在于,所述P SPS内包含的系统帧数表示为所述周期P SPS与所述一个帧结构周期内的总的时间单元数N symbol的比值,则所述第一时域间隔P’ SPS表示为P’ SPS=[S symbol×P SPS/N symbol],[]表示向下或向上取整运算。
  30. 根据权利要求28或29所述的通信装置,其特征在于,所述第二时间单元集合中第M个时间单元与所述第一时间单元之间的时域间隔为M个所述第一时域间隔,其中,所述M为小于或者等于N-1的正整数。
  31. 一种计算机程序产品,其特征在于,包括:
    计算机程序,当所述计算机程序被运行时,使得计算机执行权利要求1-15中任一项所述的方法。
  32. 一种通信系统,其特征在于,包括:
    权利要求16-27中任一项所述的通信装置和权利要求28-30中任一项所述的通信装置。
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