WO2022141465A1 - 一种资源选择的方法和装置 - Google Patents

一种资源选择的方法和装置 Download PDF

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Publication number
WO2022141465A1
WO2022141465A1 PCT/CN2020/142311 CN2020142311W WO2022141465A1 WO 2022141465 A1 WO2022141465 A1 WO 2022141465A1 CN 2020142311 W CN2020142311 W CN 2020142311W WO 2022141465 A1 WO2022141465 A1 WO 2022141465A1
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Prior art keywords
terminal device
time
resource
priority
information
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PCT/CN2020/142311
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English (en)
French (fr)
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郭文婷
董蕾
苏宏家
卢磊
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华为技术有限公司
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Priority to PCT/CN2020/142311 priority Critical patent/WO2022141465A1/zh
Publication of WO2022141465A1 publication Critical patent/WO2022141465A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal

Definitions

  • the present application relates to the field of communications, and more particularly, to a method and apparatus for resource selection.
  • D2D device-to-device
  • the application of D2D technology can reduce the burden of cellular networks, reduce battery power consumption of user equipment, increase data rates, and can well meet the needs of proximity services.
  • the D2D technology allows multiple D2D-enabled user equipment (UE) to perform direct discovery and direct communication with or without network infrastructure.
  • UE D2D-enabled user equipment
  • V2X communication refers to the communication between vehicles and anything in the outside world, including vehicle-to-vehicle communication (V2V), vehicle-to-pedestrian (V2P), vehicle-to-infrastructure communication (vehicle to infrastructure, V2I), vehicle-to-network communication (vehicle to network, V2N).
  • V2V vehicle-to-vehicle communication
  • V2P vehicle-to-pedestrian
  • V2I vehicle-to-infrastructure communication
  • V2N vehicle-to-network communication
  • V2X in the LTE system only supports broadcast communication, while in the new radio (NR) system, V2X not only supports broadcast communication, but also supports unicast communication and multicast communication.
  • NR new radio
  • the present application provides a method for resource selection, in order to avoid the half-duplex problem when the first terminal device transmits and receives information, thereby improving the reliability of transmission.
  • a first aspect provides a resource selection method, comprising: a first terminal device receiving indication information, where the indication information is used to indicate a first time unit set, where the first time unit set is where a transmission resource reserved by a second terminal device is located The indication information is carried in the first control information; the first terminal device determines the available resource set within the resource selection window according to the indication information, the available resource set does not include the time-frequency resources corresponding to the second time unit set, the The second time unit set is the time unit set in which the first time set unit is located within the resource selection window.
  • the first terminal device receives the indication information, determines the first time unit set, further determines the second time unit set in which the first time set unit is located in the resource selection window, and excludes the second time unit from the resource selection window Collecting the corresponding time-frequency resources can enhance the process of resource primary selection, resource preemption confirmation and resource reselection, thereby avoiding the half-duplex problem when the first terminal device sends and receiving information, and improving the reliability of transmission.
  • the time-frequency resources corresponding to the second set of time units include all sub-channels on the time unit where the second set of time units is located, and all the sub-channels are resource pools Included subchannels.
  • the first control information further includes a transmission type and/or a first priority, where the first priority is a priority for sending information by the second terminal device.
  • the transmission type is unicast transmission or multicast transmission
  • the first terminal device determines an available resource set within the resource selection window according to the indication information, including: A terminal device receives second control information, the second control information includes the destination address of the information sent by the second terminal device; the first terminal device determines that the destination address matches the address of the first terminal device; the first terminal device determines that the available A resource set, where the available resource set is a resource set excluding time-frequency resources corresponding to the second time unit set within the resource selection window.
  • the embodiment of the present application determines that the transmission type is unicast or multicast, and further determines that the destination address in the second control information matches the address of the first terminal device, and further determines that the first time aggregation unit is located in the second time within the resource selection window. unit set, and exclude the time-frequency resources corresponding to the second time unit set in the resource selection window, so that the half-duplex problem can be avoided, thereby improving the reliability of unicast and multicast transmission.
  • the first terminal device determining an available resource set within the resource selection window according to the indication information includes: the first terminal device determining that the first priority is higher than or equal to the second priority, the second priority is the priority of the information to be transmitted of the first terminal device; the first terminal device determines the available resource set, the available resource set is to exclude the resource selection window in the A resource set of time-frequency resources corresponding to the second time unit set.
  • the first terminal device determines that the priority of the information sent by the second terminal device is higher than or equal to the priority of the information to be transmitted by the first terminal device, and further determines the second time when the first time aggregation unit is located in the resource selection window unit set, and exclude the time-frequency resources corresponding to the second time unit set within the resource selection window, thereby avoiding the half-duplex problem and improving the reliability of transmission.
  • the method further includes: the first terminal device determines that the transmission type is broadcast transmission.
  • the method further includes: the first terminal device determines that the transmission type is multicast transmission or unicast transmission.
  • the first terminal device determines that the channel occupancy ratio or the channel busy ratio of the first terminal device is less than a preset ratio.
  • the present application by predefining a threshold and determining that the channel occupancy ratio or the channel busy ratio of the first terminal device is less than the threshold, it is possible to avoid the half-duplex problem when the resources are not congested, thereby improving the reliability of transmission .
  • the first control information is carried in a physical layer sidelink control channel PSCCH.
  • the second control information is carried on the physical layer sidelink shared channel PSSCH.
  • a resource selection apparatus in a second aspect, includes: a transceiver unit configured to receive indication information, where the indication information is used to indicate a first set of time units, the first set of time units reserved by a second terminal device Sending the set of time units where the resources are located, the indication information is carried in the first control information; the processing unit is configured to determine the available resource set within the resource selection window according to the indication information, and the available resource set does not include the time corresponding to the second time unit frequency resources, and the second time unit set is a time unit set within the resource selection window of the first time unit set.
  • the time-frequency resources corresponding to the second time unit set include subchannels on the time unit where the second time unit set is located, and all the subchannels are resources The subchannels that the pool includes.
  • the first control information further includes a transmission type and/or a first priority, where the first priority is a priority for sending information by the second terminal device.
  • the transmission type is unicast transmission or multicast transmission
  • the first terminal device determines an available resource set within the resource selection window according to the indication information
  • the transceiver unit further is used to receive second control information
  • the second control information includes the destination address of the information sent by the second terminal device
  • the processing unit is also used to determine that the destination address matches the address of the first terminal device
  • the processing unit is also used for for determining the available resource set, where the available resource set is a resource set excluding time-frequency resources corresponding to the second time unit set within the resource selection window.
  • the first terminal device determines an available resource set within the resource selection window according to the indication information, and the processing unit is further configured to determine that the first priority is higher than or lower than the second priority, the second priority is the priority of the information to be transmitted of the first terminal device; the processing unit is further configured to determine an available resource set, the available resource set is excluded in the resource selection window A resource set of time-frequency resources corresponding to the second time unit set.
  • the processing unit is further configured to determine that the transmission type is broadcast transmission.
  • the processing unit is further configured to determine that the channel occupancy ratio or the channel busy ratio of the first terminal device is smaller than a preset ratio.
  • the first control information is carried on a physical layer sidelink control channel PSCCH.
  • the second control information is carried on the physical layer sidelink shared channel PSSCH.
  • a communication apparatus comprising a memory and a processor, the memory is used for storing a computer program, the processor is used for calling and running the computer program from the memory, so that the communication apparatus is used for executing the above A first aspect and methods in various implementations of the first aspect.
  • a computer storage medium stores a computer program (also referred to as code, or instruction), which, when executed on a computer, causes the computer to execute the above-mentioned first aspect and the first A method in any of the possible implementations of an aspect.
  • a computer program also referred to as code, or instruction
  • a fifth aspect provides a chip system, the chip system includes: a processor for calling and running a computer program from a memory, so that a communication device installed with the circuit system executes the first aspect and any one of the first aspect A method in a possible implementation.
  • FIG. 1 is a schematic diagram of a scenario provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of another scenario provided by an embodiment of the present application.
  • FIG. 3 is a schematic block diagram of a method for resource selection provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a resource selection time relationship provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a SL resource pool provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a subchannel on a time unit provided by an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of another method for resource selection provided by an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of another method for resource selection provided by an embodiment of the present application.
  • FIG. 9 is a schematic block diagram of an apparatus provided by an embodiment of the present application.
  • FIG. 10 is a schematic block diagram of another apparatus provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a first terminal device provided by an embodiment of the present application.
  • LTE long term evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • 5G mobile communication system may include a non-standalone (NSA, NSA) and/or an independent network (standalone, SA).
  • NSA non-standalone
  • SA independent network
  • MTC machine type communication
  • LTE-M long term evolution-machine
  • D2D device to device
  • M2M Machine to Machine
  • IoT Internet of Things
  • the IoT network may include, for example, the Internet of Vehicles.
  • vehicle to X vehicle to X
  • V2X vehicle and vehicle Infrastructure
  • V2I vehicle to pedestrian
  • V2N vehicle to network
  • the network device may be any device with a wireless transceiver function.
  • the device includes but is not limited to: evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B, NB), base station controller (base station controller, BSC) , base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (baseband unit, BBU), wireless fidelity (wireless fidelity, WiFi) system Access point (AP), wireless relay node, wireless backhaul node, transmission point (TP) or transmission and reception point (TRP), etc.
  • evolved Node B evolved Node B
  • RNC radio network controller
  • Node B Node B
  • BSC base station controller
  • base transceiver station base transceiver station
  • BTS home base station
  • home base station for example, home evolved NodeB, or home Node B, HNB
  • It can also be 5G, such as NR , a gNB in the system, or a transmission point (TRP or TP), one or a group (including multiple antenna panels) antenna panels of a base station in a 5G system, or, it can also be a network node that constitutes a gNB or a transmission point, Such as baseband unit (BBU), or distributed unit (distributed unit, DU) and so on.
  • 5G such as NR
  • a gNB in the system or a transmission point (TRP or TP)
  • TRP or TP transmission point
  • TRP or TP transmission point
  • TP transmission point
  • BBU baseband unit
  • DU distributed unit
  • the network equipment provides services for the cell, and the terminal equipment communicates with the cell through transmission resources (for example, frequency domain resources, or spectrum resources) allocated by the network equipment, and the cell may belong to a macro base station (for example, a macro eNB or a macro gNB, etc.) , can also belong to the base station corresponding to the small cell, where the small cell can include: urban cell (metro cell), micro cell (micro cell), pico cell (pico cell), femto cell (femto cell), etc. , these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • a macro base station for example, a macro eNB or a macro gNB, etc.
  • the small cell can include: urban cell (metro cell), micro cell (micro cell), pico cell (pico cell), femto cell (femto cell), etc.
  • these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission
  • a terminal device that is, a terminal device, may also be referred to as user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile station Device, user terminal, terminal, wireless communication device, user agent or user equipment.
  • user equipment user equipment
  • UE user equipment
  • access terminal subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile station Device, user terminal, terminal, wireless communication device, user agent or user equipment.
  • the terminal device may be a device that provides voice/data connectivity to the user, such as a handheld device, a vehicle-mounted device, etc. with a wireless connection function.
  • some examples of terminals can be: mobile phone (mobile phone), tablet computer (pad), computer with wireless transceiver function (such as notebook computer, palmtop computer, etc.), mobile internet device (mobile internet device, MID), virtual reality (virtual reality, VR) equipment, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control (industrial control), wireless terminals in unmanned driving (self driving), wireless terminals in remote medical (remote medical) Terminal, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless Telephone, session initiation protocol (SIP) telephone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device, computing device or connection with wireless communication capabilities
  • wearable devices can also be called wearable smart devices, which is a general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories.
  • Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones. Use, such as various types of smart bracelets, smart jewelry, etc. for physical sign monitoring.
  • the terminal device can also include a roadside unit (RSU), whose main function is to sense the characteristics of the road network, and can be connected to dozens of signal control systems, connected to various detector information such as microwave radar, and connected to vehicles and vehicles. Roadside variable information signs, etc.
  • RSU roadside unit
  • V2X communication is aimed at high-speed equipment represented by vehicles, and is the basic technology and key technology applied in scenarios with very high communication delay requirements in the future, such as scenarios such as smart cars, autonomous driving, and intelligent transportation systems.
  • LTE V2X communication can support communication scenarios with and without network coverage, and its resource allocation method can adopt the network access device scheduling mode, such as evolved UMTS terrestrial radio access network evolved Node B, E-UTRAN Node B) scheduling mode and terminal equipment self-selection mode.
  • V-UE vehicle user equipment
  • vehicle user equipment can send some of its own information, such as position, speed, intention (turning, merging, reversing) and other information periodically and some aperiodic event-triggered information Send to surrounding V-UEs.
  • the V-UE also receives information from surrounding users in real time.
  • the 3GPP standards organization officially released the first-generation LTE V2X standard in early 2017, LTE version number Release 14.
  • the V2X communication system applicable to the embodiments of the present application will be described in detail with reference to FIG. 1 .
  • the V2X communication may include the V2V communication between the vehicle 101 and the vehicle 102 shown in FIG. 1( a ), the V2P communication between the vehicle 101 and the pedestrian 102 shown in FIG. 1( b ), the ( c) V2I communication or V2N communication of the vehicle 101 shown with the infrastructure 102 .
  • the network architecture shown in FIG. 1 is only an exemplary architecture diagram, and the embodiment of the present application does not limit the number of network elements included in the V2X communication system shown in FIG. 1 .
  • the vehicle in FIG. 1 is not limited to any type of vehicle such as a car, a bicycle, an electric vehicle, an airplane, a ship, a train, a high-speed rail, etc.
  • the vehicle may include an in-vehicle device that can communicate directly with other devices.
  • the in-vehicle equipment may be called user equipment (UE) or terminal equipment.
  • UE user equipment
  • the vehicle can be connected one-to-one with other terminal devices in the V2X communication system, that is, unicast communication, or it can perform multicast communication with other terminal devices in the V2X communication system, and can also communicate with other multiple terminal devices in the V2X communication system.
  • Terminal devices perform broadcast communications. For example, as shown in FIG.
  • FIG. 2 is a schematic diagram of multicast communication provided by an embodiment of the application.
  • the vehicle 201 may communicate with three other vehicles (vehicle 202 , vehicle 203 , and vehicle 204 ) as one communication group, the vehicles in the communication group perform multicast communication.
  • (b) of FIG. 2 is a schematic diagram of broadcast communication provided by an embodiment of the present application.
  • the vehicle 201 can broadcast data to three other vehicles (vehicle 202 , vehicle 203 , and vehicle 204 ).
  • a vehicle is used as a terminal device for description, and the terminal device may also be a vehicle-mounted device, a user's handheld communication device, etc., which is not limited in this application.
  • BSR Buffer status report If there is data in the buffer of the terminal device to be transmitted to the peer device, the terminal device needs to report the BSR to the base station first, and tell the base station through the BSR that the current buffer of the terminal device is to be transmitted. the size of the data. After receiving the BSR reported by the terminal equipment, the base station determines the size of the data to be transmitted by the terminal equipment according to the BSR, allocates corresponding uplink resources to the terminal equipment according to the size of the data to be transmitted by the terminal equipment, and notifies the terminal equipment to send the uplink resources to the terminal equipment. The peer transmits data.
  • the resource allocation mode of the base station (mode-1): it is mainly used in the case of network coverage, and the base station centrally allocates resources according to the BSR report of the terminal equipment.
  • the allocation of resources can be in dynamic mode or pre-configured mode.
  • the resources allocated by the base station include initial resources and/or retransmission resources.
  • User-selected resource mode (mode-2): The transmission resources of the terminal equipment at the transmitting end do not depend on the base station, and the terminal equipment selects the transmission resources for communication by itself. This mode is not limited by network coverage, and terminal devices can also use this mode to communicate without network coverage.
  • User-selected resources include initial resources and/or retransmission resources.
  • Resource block An RB is occupied in the frequency domain consecutive subcarriers and occupy in the time domain consecutive symbols.
  • All are positive integers. For example, in the LTE protocol, equals 12, is equal to 7; in the NR protocol, equals 12, equals 14. need to understand that in the evolution of communication protocols There may be different values, which are not limited in this application.
  • Symbol the smallest unit of time domain resources. This embodiment of the present application does not limit the time length of one symbol. The length of one symbol may be different for different subcarrier spacings.
  • an uplink symbol may be called, for example, a single carrier-frequency division multiple access (SC-FDMA) symbol or an orthogonal frequency division multiplexing (OFDM) symbol; The symbols may be referred to as OFDM symbols, for example.
  • SC-FDMA single carrier-frequency division multiple access
  • OFDM orthogonal frequency division multiplexing
  • Time slot In NR, a time slot is the smallest scheduling unit of time.
  • a format of a time slot includes 14 OFDM symbols, and the cyclic prefix (cyclic prefix, CP) of each OFDM symbol is a normal CP (normal cyclic prefix).
  • a format of a time slot includes 12 OFDM symbols, and the CP of each OFDM symbol is an extended CP (extended cyclic prefix).
  • the format of a time slot includes 7 OFDM symbols, and the CP of each OFDM symbol is a conventional CP.
  • the OFDM symbols in a time slot can be all used for uplink transmission; all of them can be used for downlink transmission; or part of them can be used for downlink transmission, part of them can be used for uplink transmission, and part of them are reserved for no transmission. It should be understood that the above examples are only illustrative, and should not constitute any limitation to the present application. For the sake of system forward compatibility, the slot format is not limited to the above examples.
  • Data, information or data information can be understood as bits generated after the information block is encoded, or, "data”, “information” or “Data information” can also be understood as a modulation symbol generated after an information block is coded and modulated.
  • Data, information or data information may be carried by time-frequency resources, where the time-frequency resources may include resources in the time domain and resources in the frequency domain. Wherein, in the time domain, the time-frequency resources may include one or more time-domain units (or may also be referred to as time units), and in the frequency domain, the time-frequency resources may include frequency-domain units or resource units.
  • a time unit may be a symbol, or a mini-slot (mini-slot), or a time slot (slot), or a subframe (subframe), which is not limited in this application, but is implemented in this application
  • the time unit will be used as a time slot for description.
  • the terms “physical resources” and “time-frequency resources” are often used interchangeably, but those skilled in the art can understand their meanings.
  • the terms “terminal equipment” and “terminal device” are often used interchangeably, but those skilled in the art can understand their meanings.
  • Information (information), signal (signal), message (message), and channel (channel) can sometimes be mixed.
  • "of”, “corresponding, relevant” and “corresponding” can sometimes be used interchangeably. It should be pointed out that when the difference is not emphasized, the meanings they intend to express are the same.
  • the first, the second, and the third are only for the convenience of distinguishing different objects, and should not constitute any limitation to the present application.
  • differentiated control information different sets of time units, etc.
  • transmission involved in the embodiments shown below may be transmission, and it should be noted that the meanings to be expressed are the same when the difference is not emphasized.
  • the "storage” involved in the embodiments shown below may refer to being stored in one or more memories.
  • the one or more memories may be set separately, or may be integrated in an encoder or a decoder, a processor, or a communication device. Some of the one or more memories may be provided separately, and some may be integrated in a decoder, a processor, or a communication device.
  • the type of the memory may be any form of storage medium, which is not limited in this application.
  • protocol may refer to a standard protocol in the communication field, for example, it may include LTE protocol, 5G or NR protocol, and related protocols applied in future communication systems, this application does not Do limit.
  • mode-2 resource allocation is supported, and resource reservation is supported in the sidelink (sidelink, SL), that is, the sidelink control information (SCI) is sent in a certain sidelink
  • SCI sidelink control information
  • the information includes the resource reservation information in the future. After other users receive the SCI reservation information, they can avoid the resource conflict by excluding the reserved resources.
  • the SCI includes the resource reservation information and the priority of the information sent by PSSCH this time. information, the source address ID and destination address ID of this PSSCH transmission.
  • the protocol defines the resource listening window (sensing window) to monitor resources in a certain window, and defines the resource selection window (selection window) to select resources in a certain window, that is, in mode-2 mode , the sending UE selects transmission resources for communication within the resource selection window according to the result of its own resource monitoring in the listening window, and the sending UE may also be called a listening UE at this time.
  • the listening UE listens according to the received signals of all time slots in all SL resource pools except the time slot that the listening UE itself has transmitted in the listening window, Or the listening result, and then exclude the resources that have been reserved by other UEs from the resource selection window according to the received signal or the listening result, that is, the listening UE excludes the time slots that need to be sent in the resource pool, and at other times in the resource pool. Continuously listen on the slot.
  • UE#1 at the transmitting end only excludes part of the time-frequency resources reserved by other UEs, that is, when UE#2 only reserves part of the time-frequency resources in a certain time slot in the SL resource pool, And when UE#1 is the receiver of the information, UE#1 can still reserve other time-frequency resources on this time slot for data transmission, but when UE#1 receives data on this time slot, it cannot send data in this time slot. Data is sent on a time slot, or when UE#1 sends data on this time slot, it cannot receive data on this time slot, and there are resource conflicts and half-duplex problems.
  • a resource preemption confirmation is proposed, that is, when a high-priority service preempts a resource reserved by a low-priority service, the preempted party can confirm the resource preemption.
  • the general process can be as follows: the upper layer of UE-A determines the physical resource set (r′ 0 , r′ 1 , r′ 2 , . . .
  • the UE-A physical layer determines whether there are resources in the set reserved by other UEs according to the listening information (including the listening information after the trigger time n).
  • UE-A determines that UE-B reserves the resource r i ' in the set according to the listening information
  • UE-A measures the received UE-B signal and determines the reference signal received power of its signal. , RSRP) measurement value is greater than the threshold Th, and the priority of UE-A and UE-B satisfies any of the following,
  • Resource pool preemption is enabled, and prio TX >prio RX , where prio TX indicates that the resource pool of UE- A that uses SA for information transmission is enabled for preemption, and prio RX indicates that UE-B is reserved on the upper ri ' The priority of the message sent.
  • the resource pool is enabled for preemption, and a specific preemption priority threshold prio pre is configured, and at the same time it satisfies prio TX >prio RX .
  • the upper layer After receiving the resource preemption confirmation request, the upper layer re-selects the resource according to the above-mentioned resource selection process, and outputs the resource set after the re-selected resource at the same time.
  • the present application provides a resource selection method, which can ensure that the half-duplex problem is avoided during resource selection, thereby improving the reliability of transmission.
  • FIG. 3 is a schematic block diagram of a method for resource selection provided by an embodiment of the present application.
  • the method 300 shown in FIG. 3 may include steps 310 and 320 . Each step in the method 300 will be described in detail below.
  • step 310 there are the following steps:
  • Step 1 Determine that the resource selection window is a set of time units corresponding to [n+T 1 , n+T 2 ] after the trigger time unit n of SL transmission resource selection.
  • the resource selection window is defined as the set of time units corresponding to [n+T 1 , n+T 2 ] after the resource selection is triggered, and the resource selection window is It includes multiple logically continuous time units, and the values of parameters T 1 and T 2 of the resource selection window are determined by the high-level configuration and the delay of information transmission. That is to say, there is at least one time unit in the resource selection window, and the number of time units is not limited here.
  • the candidate resource set in the resource selection window may include all time units in the resource selection window in the time domain, and include all subchannels of the SL resource pool in the frequency domain.
  • the time-frequency resources required for V2X communication may be configured based on the V2X communication resource pool.
  • the V2X communication resource pool can be regarded as a collection of time domain resources and frequency domain resources for V2X communication.
  • the resource pool includes several consecutive physical resource blocks (physical resource blocks, PRBs) in the frequency domain, the PRBs are divided into several subchannels, and each subchannel may contain a fixed number of PRBs.
  • PRBs physical resource blocks
  • an SL resource pool includes several consecutive sub-channels in the frequency domain (only 4 consecutive sub-channels are drawn in the figure, namely sub-channel 0, sub-channel 1, sub-channel 2 and sub-channel 3), whose time domain unit is SL time slot.
  • the number of PRBs included in each sub-channel is equal, and the specific value is configured on the resource pool by the higher layer.
  • an SL time slot is located in a time slot in the time domain and occupies multiple consecutive symbols.
  • the start symbol position of the SL time slot (start symbol) and the number of occupied continuous symbols (SL symbols length) are configured by the high layer .
  • all SL time slots have the same time domain start position and the same number of time domain persistent symbols.
  • the SL physical channel that can be transmitted on the SL time slot includes PSSCH, sidelink physical broadcast channel (physical sidelink broadcast channel, PSBCH), sidelink physical control channel (physical sidelink control channel, PSCCH) and sidelink physical broadcast channel (PSCCH) Link physical feedback channel (physical sidelink feedback channel, PSFCH).
  • the number of sub-channels included in a time slot is N
  • a candidate resource R x,y is defined as the time slot belonging to the SL resource pool within the resource selection window [n+T 1 ,n+T 2 ] in the time domain
  • the total number of candidate resources on each slot is N-L+1. That is to say, any set of continuous sub-channels whose length is equal to L meeting the above conditions can be regarded as a candidate resource R x,y , and the number of all candidate resources R x,y is M total , that is, the resource selection window The set of candidate resources within.
  • the shown subchannel S0 and subchannel S1 constitute candidate resource 0
  • subchannel S1 and subchannel S2 constitute candidate resource 1
  • subchannel S2 and subchannel S3 constitute candidate resource 2
  • subchannel S3 and subchannel S4 Candidate resource 3, sub-channel S 4 and sub-channel S 5 candidate resource 4, sub-channel S 5 and sub-channel S 6 candidate resource 5 and sub-channel S 6 and sub-channel S 7 candidate resource 6.
  • the first terminal device may determine an available resource set among the 70 candidate resources according to the indication information.
  • Step 2 Determine that the resource listening window is [nT 0 ,nT proc,0 ) before the trigger time slot n of the SL transmission resource, where T 0 is configured by high-level parameters, and T proc,0 is determined by Table 1.
  • T 0 is configured by high-level parameters
  • T proc,0 is determined by Table 1.
  • ⁇ SL is the sub-carrier spacing (sub-carrier spacing, SCS) configuration corresponding to the SL part bandwidth (bandwidth part, BWP), which is determined by Table 2.
  • Step 3 Determine that the threshold Th is a function of the priority corresponding to the received information sent by the second terminal device and the priority corresponding to the information to be transmitted by the first terminal device, which is also configured by a higher layer and will not be described here.
  • Step 4 Determine the set containing all M total candidate resources as S A .
  • Step 5 The candidate resource R x, y can be excluded from the set S A if the following conditions are met at the same time:
  • the first terminal device does not listen to the time slot That is, the first terminal device itself is in the time slot PSSCH or PSCCH have been transmitted.
  • the first terminal device may also send data. Since the SL transmission system is half-duplex, that is to say, the first terminal device can only be in one of the sending state or the receiving state, so the first terminal device cannot receive signals sent by other terminal devices when it is in the sending state. listen.
  • the V2X communication resource pool considers that the first control information sent by other terminal devices in the time slot includes all possible service periods, and reserves periodic SL transmission resources. Therefore, the first terminal device first excludes all the candidate SL transmission resources Rx ,y on the corresponding timeslots of its own PSSCH/PSCCH transmission time slot in the SL transmission resource selection window, so as to exclude all possible conflicting SL transmission resources .
  • C resel represents the number of resource cycles to be reserved for the service whose cycle configured by the upper layer is P' TX ;
  • P' TX is the first The logical time unit corresponding to the physical cycle P TX of the terminal device;
  • P′ RX is the logical time unit corresponding to the resource cycle reservation indication P RX carried in the PSSCH sent by the second terminal device.
  • T scal is the physical window length corresponding to the resource selection window length, in milliseconds (ms), that is, T 2 -T 1 is converted to ms, that is, when the integer j is determined above, it is necessary to ensure The second time unit is set in the resource selection window, and the resource reservation transmission time slot m of the second device is guaranteed to be a reservation closest to time slot n, if the resource reservation transmission time slot m is not a reservation closest to time slot n , other resource reservation information is sent from time slot m to time slot n, and the reservation at time slot m is no longer considered at this time.
  • Step 6 The candidate resource R x, y can be excluded from the set SA if the following conditions are met at the same time:
  • the first terminal device is listening to the time slot Receive the first control information sent by other terminal devices, and when the resource reservation period parameter exists, if the first terminal device is expected to be in the time slot Time-frequency resources and candidate resources determined by the received first control information Coincidence, wherein, the meanings represented by P' TX , P' RX , q, and j are the same as those represented by the corresponding parameters in step 5, and are not repeated here.
  • the first terminal device is listening to the time slot Receive the first control information sent by other terminal devices, then decode prio RX , and when the resource reservation period parameter exists, decode P RX from it, where prio RX indicates that the first control information indicates that the priority of the information. If the RSRP measurement result of the candidate resource determined by the first control information is higher than the threshold Th, then the candidate resource may be excluded from the resource selection window, where the threshold Th is an indication in the first control information received by the first terminal device A function of the priority of the information and the priority of the information to be sent by the first terminal device.
  • the resource selection method provided by the embodiment of the present application excludes all video resources corresponding to the conflicting time unit set in the resource selection window, and the specific process is as follows:
  • the first terminal device receives indication information, where the indication information is used to indicate a first set of time units, where the first set of time units is a set of time units where the transmission resources reserved by the second terminal device are located, and the indication information carries in the first control information.
  • the first control information may be control information borne by the PSCCH, and further, may also be sidelink control information (sidelink control information, SCI).
  • sidelink control information sidelink control information, SCI.
  • the control information carried in the PSCCH may be referred to as the first control information, and its carrying may specifically include physical layer resource information of the sidelink data channel, demodulation reference signal (demodulation reference signal, DMRS). ) configuration information, DMRS port number, coded modulation signal (modulation and code signal, MCS), and demodulation information such as transmission type indication information.
  • demodulation reference signal demodulation reference signal
  • MCS coded modulation signal
  • the control information carried in the PSCCH carries fields - time domain resource assignment (time resource assignment) and frequency domain resource assignment (frequency resource assignment).
  • the resources reserved in this field can be used to indicate whether the transport block (TB) carried on the PSSCH corresponding to the PSCCH has resource reservation for retransmission. If the transport block has resource reservation for retransmission, this field also uses In order to indicate the specific time-frequency position reserved, its retransmission resources are indicated by the value of the field time resource indicator value (TRIV) and the value of frequency domain resource allocation (frequency resource indicator value, FRIV).
  • TRIV can indicate the current PSSCH and PSCCH transmission, or indicate the time domain position of the subsequent PSSCH and PSCCH retransmission resources.
  • the maximum transmission times of the transport block can be configured by the resource pool. Specifically, taking the PSSCH and PSCCH retransmission times as one and two as an example, the meaning of the time domain resource allocation field is as follows:
  • N represents the maximum number of resources that can be reserved by an SCI configured in the resource pool in one cycle, and N is a positive integer; if N>1, it means that the TB reserved the retransmission resource t i after the PSSCH/PSCCH for the ith time
  • the frequency domain information of the resources reserved in the SCI can be indicated by FRIV, and the FRIV represents the frequency domain offset of the resources reserved by the SCI to the PSSCH/PSCCH.
  • the specific analysis method is as follows:
  • the PSCCH also includes the resource reservation interval (resource reservation interval) P TX of the second terminal device, which is provided by the indication information, for example, can be provided by the "Resource reservation period" field in the indication information, and the unit is ms, which is It can also be called a physical cycle.
  • P' TX is a logical time unit corresponding to the physical period P TX , which only includes time units belonging to the SL resource pool. The period indicates that the resources occupied by the PSSCH/PSCCH transmission are reserved with the period P TX , and the resources indicated by the TRIV/FRIV are reserved with the period P TX .
  • the period of the time slot configuration is Pms, that is, the SL time slot configuration is the periodic repetition of the Pms, and the specific Pms and the bitmap indicating the subframe ratio in the Pms are configured by its high-level signaling.
  • P TX and P' TX have a corresponding relationship.
  • the indication information may directly include the information of the first time unit, or the function of the indication information or the information carried by the indication information may directly or indirectly represent/identify the first time unit set. As long as the indication information can indicate that the first time unit set belongs to the protection scope of the embodiment of the present application, it is not limited here too much.
  • the first time unit set is the time unit set where the transmission resources reserved by the second terminal equipment are located, wherein the first time unit set may be a time slot (slot) set, a mini-slot (mini-slot) set, Or a subframe (subframe) set, wherein the first time unit set includes at least one time unit, the specific number of which is not limited in this application.
  • the first terminal device determines an available resource set within the resource selection window according to the indication information, the available resource set does not include the time-frequency resources corresponding to the second time unit set, and the second time unit set is the first time unit set
  • the set of time units is the set of time units within the resource selection window.
  • the first terminal device receives first control information in the resource listening window, where the first control information carries indication information, and the indication information is used to indicate the first time unit set, so that the first terminal device is within the resource selection window according to the indication information
  • An available resource set is determined, the available resource set excludes time-frequency resources corresponding to a second time unit set corresponding to time units within the resource selection window. That is to say, the available resource set is a resource set within the resource selection window that excludes the time-frequency resources corresponding to the second time unit, and the time-frequency resources corresponding to the second time unit are all sub-sets on the time unit where the second time unit set is located.
  • channel, all sub-channels mentioned here are sub-channels included in the resource pool.
  • the SL time slot configuration period is 10ms
  • the bitmap indicating its subframe ratio is '1111111111', that is, each physical time slot is an SL time slot, and the SL physical time slot and the SL logical time slot are one.
  • the BWP corresponding to the first terminal device configures the SCS to be 15kHz.
  • the first terminal device receives the resource selection trigger information on time slot n, it firstly determines that the resource selection window is [n+1,n+10], and secondly, determines the resource listening window, wherein T 0 of the listening window is determined by If the high-level configuration is 1000, according to Table 1 and Table 2, it can be known that T proc,0 is 1.
  • the first terminal device has reserved n+1, n+ with 4 timeslots as a period. 5.
  • the first terminal device may exclude the time-frequency resources corresponding to the second time unit set in the resource selection window according to the indication information, that is, all sub-channels corresponding to n+1, n+5, and n+9.
  • the first time unit set does not have a time set within the resource selection window, and in this case, the second time unit set is an empty set.
  • the first terminal device may perform at least one of step 5, step 6 and the embodiments of the present application, that is to say, the method, step 5 and step 6 provided by the embodiments of the present application It is a parallel solution, so in the process of execution, one of them may be selected for execution, or a combination of them may be executed, and this embodiment of the present application does not limit too much.
  • the first terminal device receives the indication information, determines the first time unit set, further determines the second time unit set in which the first time set unit is located in the resource selection window, and excludes the second time unit set in the resource selection window
  • the corresponding time-frequency resources can enhance the process of resource primary selection, resource preemption confirmation and resource reselection, thereby avoiding the half-duplex problem existing when the first terminal device sends and receiving information, and improving the reliability of transmission.
  • FIG. 7 is another schematic block diagram of a resource selection method provided by an embodiment of the present application.
  • the method 700 shown in FIG. 7 may include steps 710 to 750 .
  • step 710 the first terminal device receives the first control information.
  • the first terminal device triggers resource selection at time slot n, first determines the resource selection window according to the high-level parameters and transmission delay, and determines the resource listening window according to the high-level parameters and the subcarrier spacing, and the specific definition method can refer to step 1. Step 4 is not repeated here.
  • the first terminal device receives first control information, where the first control information includes indication information, where the indication information is used to indicate the first set of time units, and at the same time, the first control information further includes a transmission type. After the first terminal device receives and decodes the first control information.
  • the first control information also includes the priority of the information sent by the second terminal device, and the like, which is not repeated in this embodiment of the present application.
  • decoding is only a way to obtain information, and there may be other ways in the execution process of the terminal device to obtain the information carried by the first control information, and the examples of this application do not do anything about this. limited.
  • the first terminal device After receiving the first control information, the first terminal device determines the first time unit set according to the indication information in the first control information, and at this time, determines that the time unit set within the resource selection window in the first time unit set is the first time unit set. Two time unit sets, and further the following operations may be performed on the second time unit set.
  • step 720 the first terminal device determines that the transmission type is multicast transmission or unicast transmission.
  • step 730 the first terminal device receives the second control information.
  • step 740 the first terminal device determines that the destination address of the information sent by the second terminal device matches the address of the first terminal device.
  • the first terminal device after receiving the first control information, obtains by decoding that the transmission type is unicast transmission or multicast transmission.
  • the second terminal device sends the information.
  • the object is clear, and the first terminal device can determine whether the information sent by the first terminal device is the information that it needs to receive, so that the half-duplex problem can be avoided.
  • the specific implementation may be as follows: the first terminal device receives the second control information, the second control information carries the destination address of the information sent by the second terminal device, and the first terminal device determines the destination address of the information sent by the second terminal device and the first terminal device. The addresses of an end device match.
  • the second control information may be control information carried by the PSSCH. Further, it can also be SCI.
  • the destination address in the second control information is not the unique physical address identifier of the user, the destination address is configured by the upper layer, and is an address related to the transmission type and transmission service. If there are multiple unicast or multicast identifiers in the physical layer, there will be multiple unicast or multicast identifiers.
  • the PSSCH is used to carry the data information and the second control information.
  • the data information is the service information from the terminal device to the terminal device;
  • the second control information is mainly used to carry other control information except PSSCH DMRS, which may specifically include channel state information (channel state information, CSI), reporting trigger information, Information such as the ID of the destination user of the PSSCH, the PSSCH hybrid auto repeat request (HARQ) process number, the new data indicator (new data indicator), and the HARQ transmission version number.
  • PSSCH channel state information
  • CSI channel state information
  • HARQ hybrid auto repeat request
  • the new data indicator new data indicator
  • the HARQ transmission version number the format of the second control information is different.
  • the PSSCH needs to be transmitted together with its corresponding PSCCH during transmission, that is, the second control information needs to be transmitted together with its corresponding first control information.
  • the PSCCH is used for the first control information, and in addition to the information mentioned in the method 300, the PSCCH also includes demodulation information such as the format of the second control information.
  • the format information of the second control information indicates that the second control information is format 2-A or 2-B, 2-B is used for multicast 2, and 2-A is used for unicast, broadcast and multicast 1 or multicast 2.
  • 2-A carries the transmission type indicator (cast type indicator), as shown in Table 1, wherein multicast 1 supports only negative acknowledgement (NACK) (NACK only in Table 1). ) type HARQ multicast, that is, "11" in Table 1, which means that when a multicast user supports HARQ, the receiving end user only feeds back HARQ information when the PSSCH is not correctly decoded, and does not feed back in other scenarios.
  • HARQ information HARQ information.
  • Multicast 2 is similar to unicast, which is "01" in Table 1, that is, the receiving end user feeds back both correct decoding information (acknowledgement, ACK) and NACK for each PSSCH that supports HARQ feedback.
  • ACK acknowledgement
  • NACK NACK
  • PSCCH In a resource pool, the number of resources occupied by the PSCCH is fixed, and the number of control information bits carried by the first control information is fixed, so blind detection of the PSCCH format is not required.
  • PSCCH is transmitted in one subchannel, occupying 2 to 3 symbols in the time domain, and the frequency domain bandwidth is less than and/or equal to one subchannel bandwidth.
  • the number of PRBs in the specific PSCCH frequency domain bandwidth is configured by the resource pool, and its frequency domain starting position is the same as The sub-channel minimum PRB index position is aligned.
  • the minimum frequency domain granularity of the frequency domain resources occupied by PSCCH transmission is one subchannel, it is possible to send an independent PSSCH on each subchannel, that is, there may be PSSCH on each subchannel, and the receiving end user needs to Blind detection of the presence or absence of PSCCH on the channel.
  • one resource pool is configured with 4 subchannels, and the configured PSCCH bandwidth is the same as the subchannel bandwidth. Since PSSCH/PSCCH may be sent on each subchannel, the receiving end user needs to detect whether there is a PSCCH on each subchannel.
  • UE-A occupies subchannel 0 and subchannel 1 to transmit PSSCH/PSCCH
  • UE-B occupies subchannel 2 to transmit PSSCH/PSCCH
  • subchannel 3 is not used and is in an idle state, and no information is sent.
  • the candidate PSSCH is sent in sub-channel 1, that is to say, only the PSCCH is actually sent on sub-channel 0 and sub-channel 2, and there is no PSCCH information on other sub-channels.
  • the PSSCH is decoded according to the indication information of the first control information carried by the PSCCH to obtain the content of the second control information, and the data carried on the PSSCH is further decoded.
  • the first terminal device excludes time domain resources corresponding to the second time unit within the resource selection window.
  • the first terminal device and the second terminal device are a unicast pair, or the first terminal device and the second terminal device are member users of a multicast.
  • the first terminal device needs to avoid the The sideline information is sent on the time unit where the reserved resource of the second terminal device is located, that is, the time unit where the reserved resource of the second terminal device is located is excluded from the resource selection window.
  • the second terminal device is not specified, indicating that the first terminal device is excluded other terminal devices.
  • the first terminal device receives the sideline signal of the second terminal device in the listening window, it determines that the sideline signal is unicast or multicast transmission, and the decoded destination address of the information sent by the second terminal device is the same as the first terminal device.
  • the addresses of a terminal device match, it is necessary to further judge whether there are some time units in the second time unit set and the time units corresponding to the candidate resources are the same time unit.
  • mapping relationship can be further expressed as the same, equal, or association under a certain mapping relationship, which is not limited in this application.
  • all sub-channels on the time unit can be excluded in the resource selection window, so that the first terminal device can be in the resource selection window. Resource selection is performed in the remaining sub-channels within.
  • the first terminal device triggers resource selection on time slot n, and performs resource reservation at time slot m
  • the resource reservation transmission time slot m is not a transmission that is closest to time slot n in the series of transmissions that are periodically reserved
  • other resource reservation information is sent from time slot m to time slot n, and the reservation at time slot m is no longer considered at this time. This is because there is no indication of the number of periodic resource reservations in the first control information.
  • the first terminal user After receiving the first control information, the first terminal user can only determine the existence of the most recent periodic reservation, and cannot guarantee the subsequent period, such as the first In the third cycle, the fourth cycle, etc., whether the reservation is continued or not, in order to ensure the accuracy of the reservation resource judgment, periodic resource exclusion is performed according to a reservation closest to time slot n.
  • C resel represents the number of resource cycles to be reserved for the service whose cycle configured by the upper layer is P' TX ;
  • P' TX is the first The logical time unit corresponding to the physical cycle P TX of the terminal device;
  • P′ RX is the logical time unit corresponding to the resource cycle reservation indication P RX carried in the PSCCH sent by the second terminal device.
  • T scal is the physical window length corresponding to the resource selection window length, and the unit is milliseconds (ms), that is, T 2 ⁇ T 1 is converted to ms. That is to say, when the integer j is determined above, it is necessary to ensure that the second time unit set is within the resource selection window, and that the resource reservation transmission time slot m of the second device is a reservation closest to the time slot n. It should be noted that if slot n belongs to the SL resource pool, then otherwise is the first time slot belonging to the SL resource pool after time slot n.
  • the embodiment of the present application obtains that the transmission type is unicast or multicast by decoding the first control information, and further decodes the second control information to determine that the destination address in the decoded second control information is the first
  • the address of the terminal device and when there is a time unit in the second time unit set and the time unit corresponding to the candidate resource is the same time unit, all resources on the time unit can be excluded, so that the half-duplex problem can be avoided, and the single time unit can be improved. reliability of broadcast and multicast transmissions.
  • FIG. 8 is another schematic block diagram of a resource selection method provided by an embodiment of the present application.
  • the method 800 shown in FIG. 8 may include steps 810 to 840 .
  • step 810 the first terminal device receives the first control information, and the specific description can refer to 710, which is not repeated here.
  • step 830 the first terminal device determines that the first priority is higher than or equal to the second priority.
  • step 840 the first terminal device excludes time-frequency resources corresponding to the second time unit set within the resource selection window.
  • the first terminal device and the second terminal device are a unicast pair, or the first terminal device and the second terminal device are member users of a multicast or broadcast.
  • the first terminal device It is necessary to avoid sending sideline information on the time unit where the reserved resources of the second terminal device are located, that is, exclude the time unit where the reserved resources of the second terminal device are located in the resource selection window.
  • Terminal devices other than terminal devices.
  • the first control information carries the priority of the information sent by the second terminal device, that is, the first priority. After the first terminal device receives the first control information, it decodes it to obtain the first priority.
  • the first terminal device determines the relationship between the first priority and the priority (second priority) of the information to be transmitted of the first terminal device, when the first terminal device determines that the first priority is lower than the second priority , the information to be transmitted of the first terminal device can preempt the reserved resources of the second terminal device.
  • the first terminal device may exclude time-frequency resources corresponding to the second time unit set within the resource selection window. At this time, it is necessary to further determine whether there are some time units in the second time unit set and the time units corresponding to the candidate resources are the same time unit.
  • all sub-channels on the time unit can be excluded in the resource selection window, so that the second terminal device can be in the resource selection window. Resource selection is performed in the remaining sub-channels within.
  • the first terminal device triggers resource selection on time slot n, and performs resource reservation at time slot m
  • the transmission time slot m is not a transmission that is closest to time slot n in the series of transmissions of periodic reservation, then There are other resource reservation information transmissions from time slot m to time slot n, and the reservation at time slot m is no longer considered at this time. This is because there is no indication of the number of periodic resource reservations in the first control information.
  • the first terminal user After receiving the first control information, the first terminal user can only determine the existence of the most recent periodic reservation, and cannot guarantee the subsequent period, such as the first In the third cycle, the fourth cycle, etc., whether the reservation is continued or not, in order to ensure the accuracy of the reservation resource judgment, periodic resource exclusion is performed according to a reservation closest to time slot n.
  • C resel represents the number of resource cycles to be reserved for the service whose cycle configured by the upper layer is P' TX ;P' TX is the first The logical time unit corresponding to the physical cycle P TX of the terminal device; P′ RX the resource cycle reservation indication P RX carried in the PSCCH sent by the second terminal device corresponds to the logical time unit.
  • T scal is the physical window length corresponding to the resource selection window length, and the unit is milliseconds (ms), that is, T 2 ⁇ T 1 is converted to ms. That is to say, when the integer j is determined above, it is necessary to ensure that the second time unit set is within the resource selection window, and that the resource reservation transmission time slot m of the second device is a reservation closest to the time slot n. It should be noted that if slot n belongs to the SL resource pool, then otherwise is the first time slot belonging to the SL resource pool after time slot n.
  • the first priority is higher than or equal to the second priority may be that the priority of the data sent by the second terminal device is higher than the priority of the data to be sent by the first terminal device or the priority of the data sent by the second terminal device is equal to The priority of the data to be sent by the first terminal device.
  • the first priority being higher than or equal to the second priority may be that the priority of the control information corresponding to the data sent by the second terminal device is higher than the priority of the control information corresponding to the data to be sent by the first terminal device or the second priority.
  • the priority of the control information corresponding to the data sent by the terminal device is equal to the priority of the control information corresponding to the data to be sent by the first terminal device.
  • the first priority is higher than or equal to the second priority may be that the priority of the data to be sent by the second terminal device and the control information corresponding thereto are both higher than the priority of the data to be sent by the first terminal device and the control information corresponding to it.
  • the priority or the priority of the data to be sent by the second terminal device and the priority of the control information corresponding thereto are both equal to the priority of the data to be sent by the first terminal device and the control information corresponding thereto.
  • the above-mentioned priority may be the priority of the data information carried in the PSSCH, or may be the priority of the signaling information contained in the data information, or may be the overall priority of the data information and the signaling information contained therein.
  • the application embodiments do not limit this too much.
  • priority values are in descending order.
  • the standard supports 8 priority levels for SL.
  • the priority value of 1 indicates the highest priority.
  • there may be different definitions for priority levels which are all applicable to the embodiments of the present application, which will not be limited too much.
  • the method 800 further includes step 820, that is, the first terminal device determines that the transmission type is broadcast transmission.
  • the priority of services sent by each terminal device is different.
  • the resource selection is performed at the level, so as to avoid the half-duplex problem and improve the reliability of broadcast transmission.
  • the first terminal device before the first terminal device determines that the first priority is higher than or equal to the second priority, there may also be a preset channel occupancy ratio (channel ratio, CR) or channel busy ratio (channel busy ratio) ratio, CBR) threshold TH CR/CBR . At this time, the first terminal device needs to determine that the channel occupancy ratio or the channel busy ratio of the first terminal device is smaller than the preset ratio.
  • channel ratio channel ratio
  • CBR channel busy ratio
  • TH CR/CBR By predefining a threshold TH CR/CBR in the embodiment of the present application, it is possible to avoid the half-duplex problem under the condition that the resources are not congested, thereby improving the reliability of transmission.
  • the transmission type is unicast transmission or broadcast transmission
  • the method 800 can also be used to select resources, and the implementation process can refer to the implementation of this application, which will not be described here.
  • the time-frequency resources corresponding to the second time unit set are excluded in the resource selection window, so as to avoid the half-duplex problem, At the same time improve the reliability of transmission.
  • the method 700 and the method 800 are only exemplary descriptions, and it may also exist that when the transmission type is unicast transmission or multicast transmission, the first terminal device determines that the destination address matches the address of the first terminal device at the same time. , it is also necessary to determine that the first priority is higher than or equal to the second priority, that is to say, as long as all sub-channels on the time unit where the second time unit set is located are excluded from the resource selection window, they belong to the protection scope of this application. The application does not limit this too much.
  • Step 7 If the remaining candidate resources in the candidate resource set are less than X%, then increase the preset RSRP threshold by 3dB, and then repeat the first to fourth steps, where the value of X can be 20, 35 or 50.
  • Step 8 The first terminal device reports the candidate resource set to the upper layer, and the higher layer completes the final resource selection from the set.
  • FIG. 9 is a schematic block diagram of an apparatus provided by an embodiment of the present application. As shown in FIG. 9 , the apparatus 900 may include a processing unit 910 and a transceiver unit 920 .
  • the device 900 may correspond to the first terminal device in the method 300, the method 700, and the method 800 according to the embodiments of the present application, and the device may include a method for executing the method in FIG. 3 or the method or diagram in FIG. 7 .
  • each unit in the apparatus 900 and the above-mentioned other operations and/or functions are respectively to implement the corresponding flow of the method 300 in FIG. 3 or the method 700 in FIG. 7 or the method 800 in FIG. 8 .
  • the processing unit 910 can be used to execute the step 320 of the method 300
  • the transceiver unit 920 can be used to execute the step 310 of the method 300 .
  • the processing unit 910 can be used to perform steps 720 , 740 and 750 in the method 700
  • the transceiver unit 920 can be used to perform the steps 710 and 720 of the method 700 .
  • the processing unit 910 can be used to execute steps 820 , 830 and 840 in the method 800
  • the transceiver unit 920 can be used to execute the step 810 of the method 800 .
  • the transceiver unit may be replaced by a sending unit when performing the sending step, and the transceiver unit may be replaced by a receiving unit when performing the receiving step.
  • the transceiver unit may be replaced by a transceiver, and the sending unit may be replaced by a transmitter , the receiving unit can be replaced by a receiver.
  • the transceiver unit 920 is configured to receive indication information, where the indication information is used to indicate a first time unit set, where the first time unit set is the time unit set where the transmission resources reserved by the second terminal device are located, and the indication information carries in the first control information; the processing unit 910 is configured to determine an available resource set within the resource selection window according to the indication information, the available resource set does not include the time-frequency resources corresponding to the second time unit set, and the second time unit set is The first set of time units is a set of time units within the resource selection window.
  • the time-frequency resources corresponding to the second set of time units include all sub-channels in the time unit where the second set of time units is located, and all the sub-channels are sub-channels included in the resource pool.
  • the first control information further includes a transmission type and/or a first priority, where the first priority is a priority for sending information by the second terminal device.
  • the transmission type is unicast transmission or multicast transmission
  • the first terminal device determines the available resource set within the resource selection window according to the indication information
  • the transceiver unit 920 is further configured to receive second control information, the second control information Including the destination address of the information sent by the second terminal device
  • the processing unit 910 is further configured to determine that the destination address matches the address of the first terminal device
  • the processing unit 910 is further configured to determine the available resource set, the available resource set is in the resource selection window A resource set that excludes time-frequency resources corresponding to the second time unit set.
  • the first terminal device determines the available resource set within the resource selection window according to the indication information, and the processing unit 910 is further configured to determine that the first priority is higher than or equal to the second priority, and the second priority is the first terminal.
  • the priority of the information to be transmitted of the device; the processing unit 910 is further configured to determine an available resource set, where the available resource set is a resource set excluding time-frequency resources corresponding to the second time unit set within the resource selection window.
  • processing unit 910 is further configured to determine that the transmission type is broadcast transmission.
  • the processing unit 910 is further configured to determine that the channel occupancy ratio or the channel busy ratio of the first terminal device is smaller than a preset ratio.
  • the first control information is carried on the physical layer sidelink control channel PSCCH.
  • the second control information is carried on the physical layer side downlink shared channel PSSCH.
  • FIG. 10 is a schematic diagram of an apparatus 1000 provided by an embodiment of the present application.
  • the apparatus 1000 may include a processor 1010 (ie, an example of a processing module) and a memory 1020 .
  • the memory 1020 is used for storing instructions
  • the processor 1010 is used for executing the instructions stored in the memory 1020, so that the apparatus 1000 implements the steps of resource selection and execution in the corresponding method in FIG. 3 , FIG. 7 or FIG. 8 .
  • the apparatus 1000 may further include an input port 1030 (ie, an example of a receiving unit) and an output port 1040 (ie, an example of a sending unit).
  • the processor 1010, the memory 1020, the input port 1030 and the output port 1050 can communicate with each other through an internal connection path to transmit control and/or data signals.
  • the memory 1020 is used to store a computer program, and the processor 1010 can be used to call and run the computer program from the memory 1020 to control the input port 1030 to receive signals, and control the output port 1040 to send signals to complete the first terminal in the above method. device steps.
  • the memory 1020 may be integrated in the processor 1010, or may be provided separately from the processor 1010.
  • the input port 1030 is a receiver
  • the output port 1040 is a transmitter.
  • the receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.
  • the input port 1030 is an input interface
  • the output port 1040 is an output interface
  • the functions of the input port 1030 and the output port 1040 can be considered to be implemented by a transceiver circuit or a dedicated chip for transceiver.
  • the processor 1010 can be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.
  • a general-purpose computer may be used to implement the communication device provided by the embodiments of the present application.
  • the program codes that will implement the functions of the processor 1010 , the input port 1030 and the output port 1040 are stored in the memory 1020 .
  • each module or unit in the apparatus 1000 may be used to perform each action or process performed by a device (eg, user equipment) for resource selection in the above method, and detailed descriptions thereof are omitted here to avoid redundant description.
  • a device eg, user equipment
  • FIG. 11 is a schematic structural diagram of a first terminal device 1100 provided by the present application. For convenience of description, FIG. 11 only shows the main components of the first terminal device. As shown in FIG. 11 , the first terminal device 1100 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process communication protocols and communication data, and to control the entire terminal device, execute software programs, and process data of the software programs, for example, for supporting the terminal device to execute the above-mentioned transmission precoding matrix instruction method embodiment. the described action.
  • the memory is mainly used to store software programs and data, such as the codebook described in the above embodiments.
  • the control circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • the control circuit together with the antenna can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • FIG. 11 only shows one memory and a processor. In an actual 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 this embodiment of the present application.
  • the processor may include a baseband processor and a central processing unit.
  • the baseband processor is mainly used to process communication protocols and communication data
  • the central processing unit is mainly used to control the entire terminal device, execute A software program that processes data from the software program.
  • the processor in FIG. 11 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit may also be independent processors, interconnected by technologies such as a bus.
  • a terminal device may include multiple baseband processors to adapt to different network standards, a terminal device may include multiple central processors to enhance its processing capability, and various components of the terminal device may be connected through various buses.
  • the baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the first terminal device 1100 includes a transceiver unit 1110 and a processing unit 1120 .
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, or the like.
  • the device for implementing the receiving function in the transceiver unit 1110 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 1110 may be regarded as a transmitting unit, that is, the transceiver unit 1110 includes a receiving unit and a transmitting unit.
  • the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, and the like
  • the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.
  • the terminal device shown in FIG. 11 can perform each of the actions performed by the first terminal device in the above, and here, in order to avoid redundant description, the detailed description thereof is omitted.
  • the processor may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), dedicated integrated Circuit (application specific integrated circuit, ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • synchronous connection dynamic random access memory Fetch memory serial link DRAM, SLDRAM
  • direct memory bus random access memory direct rambus RAM, DR RAM
  • a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and the computing device may be components.
  • One or more components may reside within a process and/or thread of execution, and a component may be localized on one computer and/or distributed between 2 or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • a component may, for example, be based on a signal having one or more data packets (eg, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet interacting with other systems via signals) Communicate through local and/or remote processes.
  • data packets eg, data from two components interacting with another component between a local system, a distributed system, and/or a network, such as the Internet interacting with other systems via signals
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: 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 codes .

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Abstract

本申请提供了一种资源选择的方法及装置，适用于车联网、智能驾驶、智能网联车或自动驾驶等领域，该方法包括：第一终端装置接收指示信息，该指示信息用于指示第一时间单元集合，该第一时间单元集合为第二终端装置预约的发送资源所在的时间单元集合，该指示信息承载于第一控制信息；该第一终端装置根据该指示信息在资源选择窗内确定可用资源集合，该可用资源集合不包括第二时间单元集合对应的时频资源，该第二时间单元集合为该第一时间单元集合位于该资源选择窗内的时间单元集合。本申请实施例通过提供的资源选择方法，可以避免半双工问题，提升传输的可靠性。

Description

一种资源选择的方法和装置 技术领域
本申请涉及通信领域，并且更具体地，涉及一种资源选择的方法和装置。
背景技术
随着无线通信技术的发展，人们对数据速率和用户体验的需求日益增长，同时人们对了解周围人或事物并与之通信的邻近服务的需求也逐渐增加，因此设备到设备(device-to-device，D2D)技术应运而生。D2D技术的应用，可以减轻蜂窝网络的负担、减少用户设备的电池功耗、提高数据速率，并能很好地满足邻近服务的需求。D2D技术允许多个支持D2D功能的用户设备(user equipment，UE)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技术的特点和优势，基于D2D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技术无法实现。
因此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，包括车与车的通信(vehicle to vehicle，V2V)、车与行人的通信(vehicle to pedestrian，V2P)、车与基础设施的通信(vehicle to infrastructure，V2I)、车与网络的通信(vehicle to network，V2N)。
LTE系统中的V2X只支持广播通信，而在新无线(new radio，NR)系统中，V2X不仅支持广播通信，还支持单播通信和组播通信。目前，针对NR系统，还没有一种V2X的资源分配方法，使终端设备在进行收发数据时，避免半双工问题，从而提升单播、组播和广播的传输的可靠性。
发明内容
本申请提供一种资源选择的方法，以期第一终端装置在进行信息的收发时，避免半双工问题，从而提高传输的可靠性。
第一方面，提供了一种资源选择方法，包括：第一终端装置接收指示信息，该指示信息用于指示第一时间单元集合，该第一时间单元集合为第二终端装置预约的发送资源所在的时间单元集合，该指示信息承载于第一控制信息；第一终端装置根据指示信息在资源选择窗内确定可用资源集合，该可用资源集合不包括第二时间单元集合对应的时频资源，该第二时间单元集合为第一时间集合单元位于该资源选择窗内的时间单元集合。
基于以上技术方案，第一终端装置接收指示信息，确定第一时间单元集合，进一步确定第一时间集合单元位于资源选择窗内的第二时间单元集合，并在资源选择窗内排除第二时间单元集合对应的时频资源，能够增强资源初选，资源抢占确认和资源重选过程，进而避免第一终端装置在收发信息时存在的半双工问题，提高传输的可靠性。
结合第一方面，在第一方面的某些实现方式中，第二时间单元集合对应的时频资源包括该第二时间单元集合所在的时间单元上的所有子信道，该所有子信道为资源池包括的子信道。
结合第一方面，在第一方面的某些实现方式中，第一控制信息还包括传输类型和/或第一优先级，该第一优先级为该第二终端装置发送信息的优先级。
结合第一方面，在第一方面的某些实现方式中，该传输类型为单播传输或组播传输，该第一终端装置根据该指示信息在资源选择窗内确定可用资源集合，包括：第一终端装置接收第二控制信息，该第二控制信息包括第二终端装置发送信息的目的地址；第一终端装置确定该目的地址与该第一终端装置的地址匹配；第一终端装置确定该可用资源集合，该可用资源集合为在该资源选择窗内排除该第二时间单元集合对应的时频资源的资源集合。
本申请实施例确定传输类型为单播或组播，并进一步确定第二控制信息中的目的地址与第一终端装置的地址匹配，进一步确定第一时间集合单元位于资源选择窗内的第二时间单元集合，并在资源选择窗内排除第二时间单元集合对应的时频资源，从而可以避免半双工问题，进而提升单播和组播传输的可靠性。
结合第一方面，在第一方面的某些实现方式中，该第一终端装置根据该指示信息在资源选择窗内确定可用资源集合，包括：该第一终端装置确定该第一优先级高于或等于第二优先级，该第二优先级为该第一终端装置的待传输信息的优先级；该第一终端装置确定该可用资源集合，该可用资源集合为在该资源选择窗内排除该第二时间单元集合对应的时频资源的资源集合。
基于上述方案，第一终端装置确定第二终端装置发送信息的优先级高于或等于第一终端装置的待传输信息的优先级，进一步确定第一时间集合单元位于资源选择窗内的第二时间单元集合，并在资源选择窗内排除第二时间单元集合对应的时频资源，从而避免半双工问题，同时提高传输的可靠性。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：该第一终端装置确定该传输类型为广播传输。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：该第一终端装置确定该传输类型为组播传输或单播传输。
在广播传输场景下，侧行链路通信时存在多终端装置对多终端装置的分布关系，但每个终端装置发送的业务优先级有区别，本申请实施例利用侧行链路资源预约的特性，根据收发信息的优先级进行资源选择，从而可以避免半双工的问题，提高广播传输的可靠性。
结合第一方面，在第一方面的某些实现方式中，该第一终端装置确定该第一终端装置的信道占用比例或信道繁忙比例小于预设比例。
本申请实施例通过预定义一个阈值，并确定第一终端装置的信道占用比例或信道繁忙比例小于该阈值，能够实现在资源不拥挤的情况下，避免半双工问题，从而提高传输的可靠性。
结合第一方面，在第一方面的某些实现方式中，该第一控制信息承载于物理层侧行链路控制信道PSCCH。
结合第一方面，在第一方面的某些实现方式中，该第二控制信息承载于物理层侧行链路共享信道PSSCH。
第二方面，提供了一种资源选择装置，该装置包括：收发单元，用于接收指示信息，该指示信息用于指示第一时间单元集合，该第一时间单元集合为第二终端装置预约的发送资源所在时间单元的集合，该指示信息承载于第一控制信息；处理单元，用于根据该指示信息在资源选择窗内确定可用资源集合，该可用资源集合不包括第二时间单元对应的时频资源，该第二时间单元集合为该第一时间单元集合位于该资源选择窗内的时间单元集合。
结合第二方面，在第二方面的某些实现方式中，该第二时间单元集合对应的时频资源包括该第二时间单元集合所在的时间单元上的子信道，所述所有子信道为资源池包括的子信道。
结合第二方面，在第二方面的某些实现方式中，该第一控制信息还包括传输类型和/或第一优先级，该第一优先级为该第二终端装置发送信息的优先级。
结合第二方面，在第二方面的某些实现方式中，传输类型为单播传输或组播传输，该第一终端装置根据该指示信息在资源选择窗内确定可用资源集合，该收发单元还用于接收第二控制信息，该第二控制信息包括该第二终端装置发送信息的目的地址；该处理单元还用于确定该目的地址与该第一终端装置的地址匹配；该处理单元还用于确定该可用资源集合，该可用资源集合为在该资源选择窗内排除该第二时间单元集合对应的时频资源的资源集合。
结合第二方面，在第二方面的某些实现方式中，该第一终端装置根据该指示信息在资源选择窗内确定可用资源集合，该处理单元还用于确地该第一优先级高于或低于第二优先级，该第二优先级为该第一终端装置的待传输信息的优先级；该处理单元还用于确定可用资源集合，该可用资源集合为在该资源选择窗内排除第二时间单元集合对应的时频资源的资源集合。
结合第二方面，在第二方面的某些实现方式中，该处理单元还用于确定该传输类型为广播传输。
结合第二方面，在第二方面的某些实现方式中，该处理单元还用于确定该第一终端装置的信道占用比例或信道繁忙比例小于预设比例。
结合第二方面，在第二方面的某些实现方式中，该第一控制信息承载于物理层侧行链路控制信道PSCCH。
结合第二方面，在第二方面的某些实现方式中，该第二控制信息承载于物理层侧行链路共享信道PSSCH。
第三方面，提供了一种通信装置，包括存储器和处理器，所述存储器用于存储计算机程序，所述处理器用于从存储器调用并运行所述计算机程序，使得所述通信装置用于执行上述第一方面以及第一方面的各种实现方式中的方法。
第四方面，提供了一种计算机存储介质，所述计算机存储介质存储有计算机程序(也可以称为代码，或指令)，当其在计算机上运行时，使得计算机执行上述第一方面以及第一方面中任一种可能实现方式中的方法。
第五方面，提供了一种芯片系统，该芯片系统包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有该电路系统的通信设备执行述第一方面以及第一方面中任一种可能实现方式中的方法。
附图说明
图1是本申请实施例提供的一种场景的示意图；
图2是本申请实施例提供的另一种场景的示意图；
图3是本申请实施例提供的一种资源选择的方法的示意性框图；
图4是本申请实施例提供的一种资源选择时间关系的示意图；
图5是本申请实施例提供的一种SL资源池的示意图；
图6是本申请实施例提供的一种时间单元上的子信道的示意图；
图7是本申请实施例提供的另一种资源选择的方法的示意性框图；
图8是本申请实施例提供的另一种资源选择的方法的示意性框图；
图9是本申请实施例提供的一种装置的示意性框图；
图10是本申请实施例提供的另一种装置的示意性框图；
图11是本申请实施例提供的一种第一终端装置的结构示意图。
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。
本申请提供的技术方案可以应用于各种通信系统，例如：长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、第五代(5th generation，5G)移动通信系统或新无线接入技术(new radio access technology，NR)。其中，5G移动通信系统可以包括非独立组网(non-standalone，NSA)和/或独立组网(standalone，SA)。
本申请提供的技术方案还可以应用于机器类通信(machine type communication，MTC)、机器间通信长期演进技术(long term evolution-machine，LTE-M)、设备到设备(device to device，D2D)网络、机器到机器(machine to machine，M2M)网络、物联网(internet of things，IoT)网络或者其他网络。其中，IoT网络例如可以包括车联网。其中，车联网系统中的通信方式统称为车到其他设备(vehicle to X，V2X，X可以代表任何事物)，例如，该V2X可以包括：车辆到车辆(vehicle to vehicle，V2V)通信，车辆与基础设施(vehicle to infrastructure，V2I)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)通信等。
本申请提供的技术方案还可以应用于未来的通信系统，如第六代移动通信系统等。本申请对此不作限定。
本申请实施例中，网络设备可以是任意一种具有无线收发功能的设备。该设备包括但不限于：演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(baseband unit，BBU)，无线保真(wireless fidelity，WiFi)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission point，TP)或者发送接收点(transmission and reception point，TRP)等，还可以为5G，如，NR， 系统中的gNB，或，传输点(TRP或TP)，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)，或，分布式单元(distributed unit，DU)等。
网络设备为小区提供服务，终端设备通过网络设备分配的传输资源(例如，频域资源，或者说，频谱资源)与小区进行通信，该小区可以属于宏基站(例如，宏eNB或宏gNB等)，也可以属于小小区(small cell)对应的基站，这里的小小区可以包括：城市小区(metro cell)、微小区(micro cell)、微微小区(pico cell)、毫微微小区(femto cell)等，这些小小区具有覆盖范围小、发射功率低的特点，适用于提供高速率的数据传输服务。
在本申请实施例中，终端装置，即终端设备，也可以称为用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。
终端装置可以是一种向用户提供语音/数据连通性的设备，例如，具有无线连接功能的手持式设备、车载设备等。目前，一些终端的举例可以为：手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑(如笔记本电脑、掌上电脑等)、移动互联网设备(mobile internet device，MID)、虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等。
其中，可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
此外，终端装置还还可以包括路边单元(road side unit，RSU)，主要功能是感知路网特征，可以对接几十余种信号控制系统，对接微波雷达等多种检测器信息，对接车辆和路侧可变信息牌等。
为便于理解本申请实施例，下面以V2X通信系统为例对本申请实施例提供的方法进行说明，该方法在其他通信系统的实现过程可参照本申请实施例所述。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。LTE V2X通信可以支持有网络覆盖和无网络覆盖的通信场景，其资源分配方式可以采取网络接入设备调度模式，如演进通用陆地无线接入网节点B(evolved UMTS terrestrial radio access network evolved Node B， E-UTRAN Node B)调度模式和终端设备自选模式。基于V2X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)等信息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也会实时接收周围用户的信息。3GPP标准组织在2017年初正式发布第一代LTE V2X标准，LTE版本号Release 14。
首先结合图1详细说明适用于本申请实施例提供的V2X通信系统。如图1所示，V2X通信可以包括图1的(a)所示的车辆101与车辆102的V2V通信、图1的(b)所示的车辆101与行人102的V2P通信、图1的(c)所示的车辆101与基础设施102的V2I通信或V2N通信。可选地，图1所示的网络架构仅为示例性架构图，本申请实施例不限制图1所示V2X通信系统包括的网元的数量。
示例性的，图1中的车辆不限定于为汽车、自行车、电动车、飞机、船舶、火车、高铁等任一类型的车辆，该车辆可以包括能够与其他设备直连通信的车载设备，该车载设备可以称为用户设备(user equipment，UE)或者终端设备。该车辆可以与V2X通信系统中的其他终端设备一对一连接，即单播通信，也可以与V2X通信系统中的其他多个终端设备进行组播通信，还可以与V2X通信系统中其他多个终端设备进行广播通信。例如，图1的(a)所示，车辆101与车辆102一对一进行单播通信。图2的(a)为本申请实施例提供的组播通信的示意图，如图2的(a)所示，车辆201可以与其他三个车辆(车辆202、车辆203、车辆204)为一个通信组，该通信组内车辆进行组播通信。图2的(b)为本申请实施例提供的广播通信的示意图，如图2的(b)所示，车辆201可以向其他三个车辆(车辆202、车辆203、车辆204)广播数据。本申请实施例中，以车辆为终端装置进行描述，终端装置还可以为车载设备，用户手持通信设备等，本申请对此不做限定。
首先，为了便于理解本申请实施例，对本申请实施例涉及的一些名词进行简单描述。
1、缓存状态报告(buffer status report，BSR)：如果终端设备的缓存中有数据待传输给对端设备，则终端设备需要先向基站上报BSR，通过BSR告诉基站终端设备当前的缓存中待传输的数据的大小。基站收到终端设备上报的BSR后，根据BSR确定终端设备待传输的数据的大小，根据终端设备待传输的数据的大小为终端设备分配相应的上行资源并通知终端设备在分配的上行资源上向对端传输数据。
2、基站分配资源模式(mode-1)：主要应用于有网络覆盖的情形下，基站统一根据终端设备的BSR上报的情况，集中进行资源分配。资源的分配可以为动态模式或预配置模式。基站分配的资源包括初始资源和/或重传资源。
3、用户自选资源模式(mode-2)：发送端的终端设备的传输资源不依赖于基站，终端设备自己选择传输资源进行通信。该模式不受限于网络覆盖，在没有网络覆盖情况下，终端设备也可以用该模式进行通信。用户自选的资源包括初始资源和/或重传资源。
4、资源块(resource block，RB)：一个RB在频域上占用
Figure PCTCN2020142311-appb-000001
个连续的子载波，且在时域上占用
Figure PCTCN2020142311-appb-000002
个连续的符号。其中，
Figure PCTCN2020142311-appb-000003
均为正整数。例如，在LTE协议中，
Figure PCTCN2020142311-appb-000004
等于12，
Figure PCTCN2020142311-appb-000005
等于7；在NR协议中，
Figure PCTCN2020142311-appb-000006
等于12，
Figure PCTCN2020142311-appb-000007
等于14。需要理解，在通信协议的演变过程中
Figure PCTCN2020142311-appb-000008
可能有不同的取值，本申请对此不作限定。
5、符号(symbol)：时域资源的最小单位。本申请实施例对一个符号的时间长度不 做限制。针对不同的子载波间隔，一个符号的长度可以有所不同。作为示例而非限定，上行符号例如可以称为单载波频分多址(single carrier-frequency division multiple access，SC-FDMA)符号或正交频分多址(orthogonal frequency division multiplexing，OFDM)符号；下行符号例如可以称为OFDM符号。
6、时隙：在NR中，时隙为时间的最小调度单元。一种时隙的格式为包含14个OFDM符号，每个OFDM符号的循环前缀(cyclic prefix，CP)为常规CP(normal cyclic prefix)。一种时隙的格式为包含12个OFDM符号，每个OFDM符号的CP为扩展CP(extended cyclic prefix)。一种时隙的格式为包含7个OFDM符号，每个OFDM符号的CP为常规CP。一个时隙中的OFDM符号可以全用于上行传输；可以全用于下行传输；也可以一部分用于下行传输，一部分用于上行传输，一部分预留不进行传输。应理解，以上举例仅为示例性说明，不应对本申请构成任何限定。出于系统前向兼容性考虑，时隙格式不限于以上示例。
7、数据、信息或数据信息：在本申请实施例中，“数据”、“信息”或“数据信息”可以理解为信息块经过编码后生成的比特，或者，“数据”、“信息”或“数据信息”还可以理解为信息块经过编码调制后生成的调制符号。数据、信息或数据信息可以通过时频资源来承载，其中，该时频资源可以包括时域上的资源和频域上的资源。其中，在时域上，时频资源可以包括一个或多个时域单位(或者，也可以称为时间单位)，在频域上，时频资源可以包括频域单位或资源单元。
其中，一个时间单元可以是一个符号，或者一个迷你时隙(mini-slot)，或者一个时隙(slot)，或者一个子帧(subframe)，本申请对此并不限定，但在本申请实施例中将以时间单元为时隙进行说明，对于在其他时间单元的实现过程可以参照本申请实施例所述。
此外，为了方便理解本申请实施例，作出以下几点说明。
第一，在下文示出的实施例中，名词“物理资源”和“时频资源”经常交替使用，但本领域的技术人员可以理解其含义。名词“终端设备”和“终端装置”经常交替使用，但本领域的技术人员可以理解其含义。信息(information)，信号(signal)，消息(message)，信道(channel)有时可以混用，应当指出的是，在不强调其区别时，其所要表达的含义是一致的。“的(of)”，“相应的(corresponding，relevant)”和“对应的(corresponding)”有时可以混用，应当指出的是，在不强调其区别时，其所要表达的含义是一致的。
第二，在下文示出的实施例中，第一、第二、第三仅为便于区分不同的对象，而不应对本申请构成任何限定。例如，区分的控制信息，不同的时间单元集合等。
第三，在下文示出的实施例中涉及的“传输”，可以是发送(transmission)，应当指出的是，在不强调其区别时，其所要表达的含义是一致的。
第四，在下文示出的实施例中涉及的“保存”，可以是指的保存在一个或者多个存储器中。所述一个或者多个存储器，可以是单独的设置，也可以是集成在编码器或者译码器，处理器、或通信装置中。所述一个或者多个存储器，也可以是一部分单独设置，一部分集成在译码器、处理器、或通信装置中。存储器的类型可以是任意形式的存储介质，本申请并不对此限定。
第五，在下文示出的实施例中，“协议”可以指通信领域的标准协议，例如可以包括LTE协议、5G或NR协议以及应用于未来的通信系统中的相关协议，本申请对此不做限 定。
第六，在下文示出的实施例中，“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这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。“至少一个”是指一个或一个以上；“A和B中的至少一个”，类似于“A和/或B”，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B中的至少一个，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。
目前，在NR-V2X中，支持mode-2的资源分配，且在侧行链路(sidelink，SL)中支持资源预约，即在某一个侧行链路控制信息(sidelink control information，SCI)发送的信息包括未来一段时间内的资源预约信息，其他用户接收到该SCI预约信息以后，排除该预约资源，即可避免资源冲突，在该SCI中包含资源预约信息、本次PSSCH发送的信息优先级信息、本次PSSCH发送的源地址ID和目的地址ID。同时，协议定义了资源侦听窗口(sensing window)为在某一窗口进行资源的侦听，定义了资源选择窗口(selection window)为在某一窗口进行资源的选择，即在mode-2模式下，发送UE根据侦听窗口内自身资源侦听的结果在资源选择窗口内自行选择传输资源进行通信，此时发送UE也可以称为侦听UE。假设侦听UE在某一时隙触发资源选择，侦听UE根据侦听窗口内侦听到的所有SL资源池中除侦听UE自身进行过传输的时隙之外的所有时隙的接收信号，或者侦听结果，再根据接收信号或侦听结果从资源选择窗内排除已经被其他UE预约的资源，即侦听UE排除了资源池中需要待发的时隙，并在资源池的其他时隙上持续侦听。
但是在该资源选择过程中，发送端UE#1只排除其他UE已经预约的部分时频资源，也就是说，当UE#2在SL资源池的某一时隙上只预约了部分时频资源，且UE#1作为信息的接收端时，UE#1仍然可以预约使用该时隙上的其他时频资源进行数据的发送，但当UE#1在该时隙上接收数据时，并不能在该时隙上发送数据，或者当UE#1在该时隙上发送数据时，不能在该时隙上接收数据，存在资源冲突和半双工问题。
目前为保证高优先级业务的可靠性，支持高优先级业务在一定条件下抢占低优先级业务预约资源。为了避免资源冲突，提出资源抢占确认，即当高优先级业务抢占低优先级业务预约的资源时，被抢占方可以进行资源抢占确认。其大致流程可以为，UE-A高层根据UE-A物理层上报的资源集合SA，确定需要资源抢占确认的物理资源集合(r′ 0,r′ 1,r′ 2,...)，并告知物理层对该资源集合(r′ 0,r′ 1,r′ 2,...)进行资源抢占确认。UE-A物理层根据侦听信息(包括触发时刻n之后的侦听信息)确定是否有其他UE预约集合内的资源。当UE-A根据侦听信息确定有UE-B预约所述集合内的资源r i'，同时UE-A测量接收到的UE-B信号，确定其信号的参考信号接收功率(reference signal received power，RSRP)测量值大于阈值Th，且UE-A和UE-B的优先级满足以下的任何一条，
(1)资源池使能抢占，且prio TX＞prio RX，其中prio TX表示使用S A进行信息发送的UE-A的资源池使能抢占，prio RX表示UE-B预约在上r i'上发送的信息优先级。
(2)资源池使能抢占，且配置了具体的抢占优先阈值prio pre，且同时满足
Figure PCTCN2020142311-appb-000009
prio TX＞prio RX。
当满足上述条件时，则判断UE-A的r i'被抢占，且向高层上报集合中的r i'资源被抢占，需要把资源r i'从S A排除。
高层接收到该资源抢占确认请求以后按照上述的资源选择过程重新进行资源选择，同时输出重新进行资源选择后的资源集合。
但在进行资源抢占确认的时候，只排除被抢占的资源。当抢占资源的用户为一个单播对中的另外一个用户，或者一个组播中的其他用户的时候，只排除被抢占的资源，仍然不能解决半双工问题。
有鉴于此，本申请提供一种资源选择方法，能够保证在进行资源选择时，避免半双工的问题，进而提高传输的可靠性。
下文会结合图3至图8对本申请提供的资源选择的方法展开描述。
图3是本申请实施例提供的资源选择的方法的示意性框图。图3所示的方法300可以包括步骤310和320。下面对方法300中各步骤做详细说明。
示例性的，在步骤310之前，存在如下几个步骤：
步骤1：确定资源选择窗口为SL传输资源选择的触发时间单元n之后的[n+T 1,n+T 2]对应的时间单元集合。
如图4所示，假设第一终端设备在时间单元n触发资源选择，定义资源选择窗口为资源选择触发之后的[n+T 1,n+T 2]对应的时间单元集合，资源选择窗为包含逻辑上连续的多个时间单元，具体确资源选择窗的参数T 1和T 2的值由高层配置以及信息传输的时延确定。也就是说，在资源选择窗口存在至少一个时间单元，时间单元的数量在此不做限定。其中，该资源选择窗内的候选资源集合可以为时域上包含资源选择窗内的所有时间单元，频域上包含SL资源池的所有子信道。
应理解，V2X通信时所需要的时频资源可以基于V2X通信资源池来进行配置。V2X通信资源池可以看做是用于V2X通信的时域资源和频域资源的集合。
资源池频域上包括连续的若干物理资源块(physical resource block，PRB)，所述PRB分成若干个子信道，每个子信道可以包含固定数量的PRB。
如图5所示，在一个SL资源池，频域上包括若干连续的子信道(在图中只画出了4个连续的子信道，即子信道0、子信道1、子信道2和子信道3)，其时域单位为SL时隙。每个子信道中包含的PRB的数量相等，具体取值是由高层配置到资源池上。
应理解，一个SL时隙在时域上位于一个时隙内，占用连续多个符号，SL时隙的起始符号位置(start symbol)以及占用的持续符号数量(SL symbols length)均由高层配置。在一个资源池中所有的SL时隙的时域起始位置以及时域持续符号数量都相同。其中，可以在SL时隙上传输的SL物理信道包含PSSCH、侧行链路物理广播信道(physical sidelink broadcast channel，PSBCH)、侧行链路物理控制信道(physical sidelink control channel，PSCCH)和侧行链路物理反馈信道(physical sidelink feedback channel，PSFCH)。
作为一种可能的方式，在一个时隙上所包括的子信道个数为N，对应的子信道集合为S＝{S 0,S 1,…,S N-1}。一个候选资源R x,y被定义为在时域上位于资源选择窗口[n+T 1,n+T 2]内属于SL资源池的时隙
Figure PCTCN2020142311-appb-000010
在频域上位于子信道x+j的子信道集合，其中j＝0,…,L-1，即在频域上体现为长度为L的一组连续的子信道集合，L为待传输数据所对应的PSSCH/PSCCH占用的子信道的个数。因此在每个时隙上的候选资源总数为N-L+1。也就是说，任何一组符合上述条件的长度等于L的连续子信道集合都可以被认为是一个候选资源R x,y，全部候选资源R x,y的个数为M total，即资源选择窗内的候选资源集合。
示例性的，假设在资源选择窗内有10个时隙，每个时隙上包括的最大子信道个数N为8，如图6所示，其对应的子信道集合为S＝{S 0,S 1,…,S 7}，假设待传输数据所对应的PSSCH占用的子信道个数L为2，则每个时隙上的候选资源总数为8-2+1＝7，即图6所示的子信道S 0和子信道S 1构成候选资源0，子信道S 1和子信道S 2构成候选资源1，子信道S 2和子信道S 3构成候选资源2，子信道S 3和子信道S 4候选资源3，子信道S 4和子信道S 5候选资源4，子信道S 5和子信道S 6候选资源5和子信道S 6和子信道S 7候选资源6。在每个时隙上总共有7个候选资源，则在资源选择窗内总共有70个候选资源，第一终端装置可以根据指示信息在这70个候选资源中确定可用资源集合。
应理解，上述仅仅是示例性说明，对资源选择窗内的时隙个数，每个时隙上的子信道的个数以及待传输数据所对应的PSSCH占用的子信道个数，本申请实施例均不做任何限定。
步骤2：确定资源侦听窗口为SL传输资源的触发时隙n之前的[n-T 0,n-T proc,0)，其中T 0由高层参数配置，T proc,0由表1确定。其中μ SL为SL部分带宽(bandwidth part，BWP)对应的子载波间隔(sub-carrier spacing，SCS)配置，其由表2确定。
表1 μ SL和T proc,0的关系
μ SL T proc,0
0 1
1 1
2 2
3 4
表2 μ SL和子载波间隔的关系
μ SL SCS(kHz)
0 15
1 30
2 60
3 120
4 240
步骤3：确定门限Th为接收到的第二终端装置发送信息对应的优先级和第一终端装置的待传输信息对应的优先级的函数，其也由高层配置，在此不做过多描述。
步骤4：确定包含全部M total个候选资源的集合为S A。
步骤5：如果同时满足以下条件，可以将候选资源R x,y从集合S A中排除：
(1)第一终端装置没有侦听时隙
Figure PCTCN2020142311-appb-000011
即第一终端装置自身在时隙
Figure PCTCN2020142311-appb-000012
发送过PSSCH或PSCCH。
在资源侦听窗口内，第一终端装置也可以发送数据。由于SL传输系统是半双工的，也就是说，第一终端装置只能处于发送状态或者接收状态之一，因此第一终端装置在处于发送状态时无法通过接收其他终端装置发送的信号来进行侦听。此时，V2X通信资源池认为其他终端装置在该时隙上发送的第一控制信息中包含所有可能的业务周期，并且预约周期性的SL传输资源。因此，第一终端装置首先将其自身PSSCH/PSCCH的发送时隙在SL 传输资源选择窗内对应时隙上的候选SL传输资源R x,y全部排除，以排除所有可能产生冲突的SL传输资源。
(2)存在整数j满足y+j×P′ TX＝m+q×P′ RX。
其中，q＝1,2,…,Q，j＝0,1,…,C resel-1，C resel表示高层配置的周期为P′ TX的业务待预约资源周期数量；P′ TX为第一终端装置的物理周期P TX对应的逻辑时间单元；P′ RX为第二终端装置发送的PSSCH中携带的资源周期预约指示P RX对应的逻辑时间单元。如果
Figure PCTCN2020142311-appb-000013
并且n'-m≤P′ RX，则
Figure PCTCN2020142311-appb-000014
否则Q＝1，其中，T scal为资源选择窗长对应的物理窗长，单位是毫秒(ms)，即T 2-T 1换算到ms，也就是说，在上述确定整数j的同时要保证第二时间单元集合在资源选择窗内，并且保证第二装置的资源预约发送时隙m为最接近时隙n的一次预约，如果该资源预约发送时隙m不是最接近时隙n的一次预约，则在时隙m到时隙n中存在其他资源预约信息发送，此时就不再考虑时隙m处的预约。
步骤6：如果同时满足以下条件，可以将候选资源R x,y从集合S A中排除：
(1)第一终端装置在侦听时隙
Figure PCTCN2020142311-appb-000015
接收其他终端装置发送的第一控制信息，并当资源预约周期(resource reservation period)参数存在时，如果预计第一终端装置在时隙
Figure PCTCN2020142311-appb-000016
接收到的第一控制信息所确定的时频资源与候选资源
Figure PCTCN2020142311-appb-000017
重合，其中，P′ TX、P′ RX、q、j表示的含义与步骤5中对应参数表示的含义相同，在此不再赘述。
(2)第一终端装置在侦听时隙
Figure PCTCN2020142311-appb-000018
接收其他终端装置发送的第一控制信息，然后译码prio RX，并且当资源预约周期(resource reservation period)参数存在时，从其中译码P RX，其中，prio RX表示该第一控制信息中指示的信息的优先级。如果通过该第一控制信息确定的候选资源的RSRP测量结果高于门限Th，那么可以从资源选择窗口中排除该候选资源，其中，门限Th为第一终端装置接收到的第一控制信息中指示的信息的优先级和第一终端装置待发送的信息的优先级的函数。
作为一种可能的实现方式，在上述步骤1至步骤4之后，通过本申请实施例提供的资源选择方法在资源选择窗内排除从冲突时间单元集合对应的所有视频资源，其具体过程如下：
在步骤310中，第一终端装置接收指示信息，该指示信息用于指示第一时间单元集合，该第一时间单元集合为第二终端装置预约的发送资源所在的时间单元集合，该指示信息承载于第一控制信息。
可选地，第一控制信息可以是PSCCH承载的控制信息，进一步而言，还可以是侧行链路控制信息(sidelink control information，SCI)。
以PSCCH为例进行进一步的说明，PSCCH中承载的控制信息可以称为第一控制信息，其承载具体可以包括侧行链路数据信道的物理层资源信息、解调参考信号(demodulation reference signal，DMRS)配置信息、DMRS端口数、编码调制信号(modulation and code signal，MCS)以及传输类型指示信息等解调信息。
PSCCH中承载的控制信息中携带字段——时域资源分配(time resource assignment)和频域资源分配(frequency resource assignment)。该字段预留的资源可以用于指示PSCCH对应的PSSCH上承载的传输块(transport block，TB)是否有重传的资源预留，若该传输 块有重传的资源预留，该字段还用于指示预留的具体时频位置，其重传资源通过字段时域资源分配的值(time resource indicator value，TRIV)和频域资源分配的值(frequency resource indicator value，FRIV)指示。
根据资源池配置情况，TRIV可以指示本次PSSCH与PSCCH传输，或者指示后续多次的PSSCH与PSCCH重传资源的时域位置，传输块的最大传输次数可由资源池配置。具体的，以PSSCH与PSCCH重传次数为一次和两次为例，时域资源分配字段的含义如下：
Figure PCTCN2020142311-appb-000019
其中N表示资源池配置的一个SCI在一个周期内可以预约资源的最大数量，N为正整数；若N>1，表示所述TB预约了重传资源t i所述PSSCH/PSCCH之后第i次预约资源到本次PSSCH/PSCCH的时域偏移量，单位是逻辑时隙，若N＝2，1≤t 1≤31；若N＝3，1≤t 1≤30，t 1＜t 2≤31。
同样SCI中预约的资源的频域信息可以用FRIV指示，所述FRIV表示SCI预约的资源到所述PSSCH/PSCCH的频域偏移量，具体解析方法如下：
Figure PCTCN2020142311-appb-000020
其中，
Figure PCTCN2020142311-appb-000021
表示第二次资源预约的起始子信道的索引；
Figure PCTCN2020142311-appb-000022
表示第二次资源预约的起始子信道的索引；
Figure PCTCN2020142311-appb-000023
表示PSSCH与PSCCH所在资源池中的子信道的数量。
除此之外，PSCCH还包括第二终端设备的资源预约间隔(resource reservation interval)P TX，其由指示信息提供，例如可以是指示信息中的“Resource reservation period”字段提供， 单位为ms，其还可以被称为物理周期。P′ TX是物理周期P TX对应的逻辑时间单元，其只包括属于SL资源池内的时间单元。该周期表示所述PSSCH/PSCCH发送占用的资源以周期P TX进行预约，以及TRIV/FRIV指示的资源以周期P TX进行预约。
在NR系统的时隙配置中，时隙配置的周期为Pms，即SL时隙配置是Pms周期性重复，具体的Pms以及指示Pms内的子帧配比的比特地图由其高层信令配置。其中，P TX和P′ TX有对应关系。
应理解，上述仅仅是以NR系统中的时隙进行说明，其在不同的系统或不同的时间单元下转换关系也可能不相同，本申请实施例对此不做过多限定。
应理解，指示信息可以直接包含第一时间单元的信息，也可以是该指示信息的功能或者其带有的信息可以直接或者间接表示/标识第一时间单元集合。该指示信息只要能表示出第一时间单元集合均属于本申请实施例的保护范围，在此不做过多的限定。
在步骤310中，第一时间单元集合为第二终端设备预约的发送资源所在的时间单元集合，其中第一时间单元集合可以是时隙(slot)集合，迷你时隙(mini-slot)集合，或者子帧(subframe)集合，其中，第一时间单元集合中包括至少一个时间单元，其具体数量本申请并不做任何限定。
在步骤320中，第一终端装置根据该指示信息在资源选择窗内确定可用资源集合，该可用资源集合不包括第二时间单元集合对应的时频资源，该第二时间单元集合为该第一时间单元集合位于资源选择窗内的时间单元集合。
第一终端装置在资源侦听窗内接收第一控制信息，该第一控制信息携带指示信息，该指示信息用于指示第一时间单元集合，从而第一终端装置根据指示信息在资源选择窗内确定可用资源集合，该可用资源集合排除第二时间单元集合对应的时频资源，该第二时间单元集合对应位于资源选择窗内的时间单元。也就是说，可用资源集合是资源选择窗内排除第二时间单元对应的时频资源的资源集合，该第二时间单元对应的时频资源为第二时间单元集合所在的时间单元上的所有子信道，这里所提到的所有子信道为资源池包括的子信道。
示例性的，SL时隙配置周期为10ms，指示其子帧配比的比特地图为‘1111111111’，即物理上的每个时隙均为SL时隙，SL物理时隙与SL逻辑时隙一一对应；第一终端装置对应的BWP配置SCS为15kHz。当第一终端装置在时隙n上接收到资源选择触发信息时，首先确定资源选择窗口为[n+1,n+10]，其次，确定资源侦听窗口，其中侦听窗口的T 0由高层配置为1000，则根据表1和表2可知T proc,0为1，此时可以确定其资源侦听窗口为[n-1000,n-1)。当第一终端装置在时隙n-3上侦听到来自第二终端装置发送的PSCCH/PSSCH信号，获得第一控制信息，该第一控制信息的指示信息指示周期为P TX＝4ms，即周期对应的逻辑时隙P TX＝4个时隙在上述子帧配比下SL时隙在物理上是连续时，该第一终端装置以4个时隙为周期预约了n+1、n+5、n+9、n+13、n+17……等时隙上的资源，即第一时间单元集合，其中位于资源选择窗口内的第二时间单元集合对应为、n+5、n+9。此时，第一终端装置可以根据指示信息在资源选择窗内排除第二时间单元集合对应的时频资源，即n+1、n+5、n+9中对应的所有子信道，应注意所述侦听时刻m＝n-3满足m-n'小于等于P′ TX，n'表示时隙n对应的逻辑时隙。
应理解，作为一种可能的实现方式，第一时间单元集合并没有位于资源选择窗内的时间集合，此时，第二时间单元集合为空集。
应理解，第一终端装置在执行步骤1至步骤4之后，可以执行步骤5、步骤6和本申请实施例中的至少一种，也就是说本申请实施例提供的方法、步骤5和步骤6是并列的方案，所以在执行的过程中，可以择其一执行，也可以组合执行，对此本申请实施例不做过多的限定。
应理解，上述仅仅是举例说明，适用本申请实施例的资源选择并不局限于此，任何能通过方法300能够实现资源选择均属于本申请保护的范围。
基于上述方案，第一终端装置接收指示信息，确定第一时间单元集合，进一步确定第一时间集合单元位于资源选择窗内的第二时间单元集合，并在资源选择窗内排除第二时间单元集合对应的时频资源，能够增强资源初选，资源抢占确认和资源重选过程，进而避免第一终端装置在收发信息时存在的半双工问题，提高传输的可靠性。
图7是本申请实施例提供的资源选择方法的另一示意性框图。如图7所示的方法700可以包括步骤710至步骤750。
在步骤710中，第一终端装置接收第一控制信息。
示例性的，第一终端装置在时隙n触发资源选择，首先通过高层参数和传输时延确定资源选择窗，根据高层参数和子载波间隔确定资源侦听窗，其具体的定义方式可以参照步骤1至步骤4，在此不进行过多的赘述。
示例性的，第一终端设备接收第一控制信息，该第一控制信息包括指示信息，该指示信息用于指示第一时间单元集合，同时，第一控制信息还包括传输类型。当第一终端装置接收第一控制信息后并对其进行译码。
应理解，第一控制信息中除上述指示信息、传输类型外，还包括第二终端装置发送信息的优先级等，本申请实施例不再赘述。
还应理解，上述所说的译码，仅仅是得到信息的一种方式，终端装置在执行的过程中可能还存在其他方式得到第一控制信息承载的信息，本申请实施实例对此不做任何限定。
第一终端装置接收到第一控制信息后，根据第一控制信息中的指示信息确定第一时间单元集合，此时，并确定第一时间单元集合中位于资源选择窗内的时间单元集合为第二时间单元集合，进一步可以对第二时间单元集合进行以下操作。
在步骤720中，第一终端装置确定传输类型为组播传输或单播传输。
在步骤730中，第一终端装置接收第二控制信息。
在步骤740中，第一终端装置确定第二终端装置发送信息的目的地址与第一终端装置的地址匹配。
示例性的，第一终端装置接收到第一控制信息后，通过译码得到其传输类型为单播传输或组播传输，在单播传输或组播传输的场景下，第二终端装置发送信息的对象明确，第一终端装置可以判断第一终端装置发送信息是否是自己需要接收的信息，从而可以避免半双工问题。其具体的实现方式可以为，第一终端装置接收第二控制信息，该第二控制信息携带第二终端装置发送信息的目的地址，第一终端装置确定第二终端装置发送信息的目的地址与第一终端装置的地址匹配。
可选地，第二控制信息可以是PSSCH承载的控制信息。进一步而言，还可以是SCI。
需要说明的是，第二控制信息中的目的地址不是用户的唯一物理地址标识，该目的地址是由高层配置的，是与传输类型和传输业务相关的地址，当第一终端装置存在多个单播或组播通信，则物理层会存在多个单播或组播标识。
以PSCCH和PSSCH为例进行说明，PSSCH用于承载数据信息和第二控制信息。其中，数据信息为在终端装置到终端装置的业务信息；第二控制信息主要用于承载除PSSCH DMRS以外的其他控制信息，具体可以包括信道状态信息(channel state information，CSI)、上报触发信息、PSSCH的目的用户的ID、PSSCH混合自动重传请求(hybrid auto repeat request，HARQ)进程号、新传数据指示(new data indicator)、HARQ传输版本号等信息。应理解，根据业务信息类型不同，第二控制信息的格式有所不同。需要注意的是，PSSCH传输时需要与其对应的PSCCH一起传输，即第二控制信息需要与其对应的第一控制信息一起传输。
PSCCH用于第一控制信息，其承载除包括方法300中提到的信息外，还包括第二控制信息的格式等解调信息。
应理解，第二控制信息的格式信息指示第二控制信息为格式2-A或2-B，2-B用于组播2，2-A用于单播、广播和组播1或者组播2，进一步而言，2-A中携带传输类型指示信息(cast type indicator)，如表1所示，其中，组播1为仅支持否定应答(negative acknowledgement，NACK)(表1中的NACK only)类型的HARQ的组播，即表1中的“11”，其表示组播用户在支持HARQ时，收端用户只有在没有正确译码PSSCH时，才反馈HARQ信息，其他场景下，不反馈HARQ信息。组播2和单播类似，其为表1中的“01”，即收端用户对每一个支持HARQ反馈的PSSCH，既反馈译码正确信息(acknowledgement，ACK)，也反馈NACK。表1中的“00”表示广播，“10”表示单播。
表3业务类型对应的指示信息值
指示信息值 业务类型
00 广播
01 组播2
10 单播
11 组播1
在一个资源池中，PSCCH占用的资源数量固定，第一控制信息承载的控制信息比特数量固定，因此不需要对PSCCH格式进行盲检测。PSCCH在一个子信道内传输，时域占用2到3个符号，频域带宽小于和/或等于一个子信道带宽，具体PSCCH频域带宽的PRB数量由资源池配置，其频域起始位置与子信道最小PRB索引位置对齐。由于PSCCH传输占用频域资源的最小频域粒度为一个子信道，因此每一个子信道上均有可能发送独立的PSSCH，即每一个子信道上均有可能存在PSSCH，收端用户需要在每个子信道上盲检测PSCCH存在与否。
示例性的，如图5所示，一个资源池配置了4个子信道，且配置PSCCH带宽与子信道带宽相同。由于每个子信道上都可能发送PSSCH/PSCCH，收端用户需要在每个子信道上检测是否有PSCCH存在。图5中，UE-A占用子信道0和子信道1发送PSSCH/PSCCH，UE-B占用子信道2发送PSSCH/PSCCH，子信道3未使用处于空闲状态，没有信息发送。而在子信道1中发送的是候选PSSCH，也就是说实际上只有子信道0和子信道2上发送 PSCCH，其他子信道上没有PSCCH信息，那么当收端用户在子信道0和子信道2上检测到PSCCH以后，根据其承载的第一控制信息的指示信息，对PSSCH进行译码，获得第二控制信息的内容，进一步对PSSCH上承载的数据进行译码。
在步骤740中，第一终端装置在资源选择窗内排除第二时间单元对应的时域资源。
示例性的，第一终端装置与第二终端装置为一个单播对，或者第一终端装置和第二终端装置为一个组播的成员用户，为避免半双工问题，第一终端装置需要避免在第二终端装置的预约资源所在时间单元上发送侧行信息，即在资源选择窗内排除第二终端装置的预约资源所在时间单元，此时第二终端装置非特指，表示除第一终端装置之外的其他终端装置。当第一终端装置接收第二终端装置在侦听窗内的侧行信号，确定所述侧行信号为单播或组播传输，且译码得到的第二终端装置发送信息的目的地址与第一终端装置的地址匹配时，此时还需要进一步判断第二时间单元集合是否存在某些时间单元与候选资源对应的时间单元为同一时间单元。
需要注意的是，上述提到的匹配还可以进一步表达为相同、相等或某映射关系下关联，对此本申请不做过多限定。
可选地，上述地址来自于SA2。
当第二时间单元集合中存在时间单元与候选资源对应的时间单元为同一时间单元时，则可以在资源选择窗内排除该时间单元上的所有子信道，从而第一终端装置可以在资源选择窗内剩下的子信道中进行资源选择。
应理解，假设第一终端装置在时隙n上触发资源选择，在时隙m处进行资源预约，如果该资源预约发送时隙m不是周期预约的系列发送中的最接近时隙n的一次发送，则在时隙m到时隙n中存在其他资源预约信息发送，此时就不再考虑时隙m处的预约。这是由于第一控制信息中没有周期性的资源预约次数的指示信息，第一终端用户在接收到第一控制信息后，只能确定最近的一次周期预约存在，不能保证后续的周期，例如第三个周期，第四个周期等，预约是否继续，为保证预约资源判断的准确性，根据最接近时隙n的一次预约进行周期性的资源排除。
其中，第二时间单元集合中存在时间单元与候选资源对应的时间单元为同一时间单元，即存在整数j满足y+j×P′ TX＝m+q×P′ RX，换言之，第一终端装置预期在
Figure PCTCN2020142311-appb-000024
收的第一控制信息所指示的时频资源与候选资源
Figure PCTCN2020142311-appb-000025
重合。其中，q＝1,2,…,Q，j＝0,1,…,C resel-1，C resel表示高层配置的周期为P′ TX的业务待预约资源周期数量；P′ TX为第一终端装置的物理周期P TX对应的逻辑时间单元；P′ RX为第二终端装置的发送的PSCCH中携带的资源周期预约指示P RX对应的逻辑时间单元。如果P RX＜T scal，并且n'-m≤P′ RX，则
Figure PCTCN2020142311-appb-000026
否则Q＝1，其中，T scal为资源选择窗长对应的物理窗长，单位是毫秒(ms)，即T 2-T 1换算到ms。也就是说，在上述确定整数j的同时要保证第二时间单元集合在资源选择窗内，并且保证第二装置的资源预约发送时隙m为最接近时隙n的一次预约。应注意的是，如果时隙n属于SL资源池，则
Figure PCTCN2020142311-appb-000027
否则
Figure PCTCN2020142311-appb-000028
为时隙n之后第一个属于SL资源池的时隙。
本申请实施例通过对第一控制信息进行译码得到传输类型为单播或组播，并进一步对 第二控制信息进行译码，确定译码后的第二控制信息中的目的地址为第一终端装置的地址，同时在第二时间单元集合中存在时间单元与候选资源对应的时间单元为同一时间单元时，可以排除该时间单元上的所有资源，从而可以避免半双工问题，进而提升单播和组播传输的可靠性。
图8是本申请实施例提供的资源选择方法的又一示意性框图，如图8所示的方法800可以包括步骤810至步骤840。
在步骤810中，第一终端装置接收第一控制信息，其具体的说明可以参照710，在此不过多赘述。
在步骤830中，第一终端装置确定第一优先级高于或等于第二优先级。
在步骤840中，第一终端装置在资源选择窗内排除第二时间单元集合对应的时频资源。
示例性的，第一终端装置与第二终端装置为一个单播对，或者第一终端装置和第二终端装置为一个组播或广播的成员用户，为避免半双工问题，第一终端装置需要避免在第二终端装置的预约资源所在时间单元上发送侧行信息，即在资源选择窗内排除第二终端装置的预约资源所在时间单元，此时第二终端装置非特指，表示除第一终端装置之外的其他终端装置。在第一控制信息中，携带第二终端装置发送信息的优先级，即第一优先级，当第一终端装置接收到第一控制信息后，对其进行译码得到第一优先级，此时，第一终端装置判断第一优先级和第一终端装置的待传输信息的优先级(第二优先级)之间的关系，当第一终端装置确定第一优先级低于第二优先级时，第一终端装置的待传输信息可以抢占第二终端装置的预约资源。当第一终端装置确定第一优先级高于或等于第二优先级时，第一终端装置可以在资源选择窗内排除第二时间单元集合对应的时频资源。此时还需要进一步判断第二时间单元集合是否存在某些时间单元与候选资源对应的时间单元为同一时间单元。当第二时间单元集合中存在时间单元与候选资源对应的时间单元为同一时间单元时，则可以在资源选择窗内排除该时间单元上的所有子信道，从而第二终端装置可以在资源选择窗内剩下的子信道中进行资源选择。
应理解，假设第一终端装置在时隙n上触发资源选择，在时隙m处进行资源预约，如果该发送时隙m不是周期预约的系列发送中的最接近时隙n的一次发送，则在时隙m到时隙n中存在其他资源预约信息发送，此时就不再考虑时隙m处的预约。这是由于第一控制信息中没有周期性的资源预约次数的指示信息，第一终端用户在接收到第一控制信息后，只能确定最近的一次周期预约存在，不能保证后续的周期，例如第三个周期，第四个周期等，预约是否继续，为保证预约资源判断的准确性，根据最接近时隙n的一次预约进行周期性的资源排除。
其中，第二时间单元集合中存在时间单元与候选资源对应的时间单元为同一时间单元，即存在整数j满足y+j×P′ TX＝m+q×P′ RX，换言之，第一终端装置预期在
Figure PCTCN2020142311-appb-000029
收的第一控制信息所指示的时频资源与候选资源
Figure PCTCN2020142311-appb-000030
重合。其中，q＝1,2,…,Q，j＝0,1,…,C resel-1，C resel表示高层配置的周期为P′ TX的业务待预约资源周期数量；P′ TX为第一终端装置的物理周期P TX对应的逻辑时间单元；P′ RX第二终端装置的发送的PSCCH中携带的资源周期预约指示P RX对应逻辑时间单元。如果P RX＜T scal，并且n'-m≤P′ RX，则
Figure PCTCN2020142311-appb-000031
否则Q＝1，其中，T scal为资源选择窗长对应的物理窗长，单位是毫秒(ms)，即T 2-T 1换算到ms。也就是说，在上述确定整数j的同时要保证第二时间单元集合在资源选择窗内，并且保证第二装置的资源预约发送时隙m为最接近时隙n的一次预约。应注意的是，如果时隙n属于SL资源池，则
Figure PCTCN2020142311-appb-000032
否则
Figure PCTCN2020142311-appb-000033
为时隙n之后第一属于SL资源池的时隙。
可选地，第一优先级高于或等于第二优先级可以是第二终端装置发送数据的优先级高于第一终端装置待发送数据的优先级或第二终端装置发送数据的优先级等于第一终端装置待发送数据的优先级。
可选地，第一优先级高于或等于第二优先级可以是第二终端装置发送数据对应的控制信息的优先级高于第一终端装置待发送数据对应的控制信息的优先级或第二终端装置发送数据对应控制信息的优先级等于第一终端装置待发送数据对应的控制信息的优先级。
可选地，第一优先级高于或等于第二优先级可以是第二终端装置发送数据和与其对应的控制信息的优先级均高于第一终端装置待发送数据和与其对应的控制信息的优先级或第二终端装置发送数据和与其对应控制信息的优先级均等于第一终端装置待发送数据和与其对应的控制信息的优先级。
因此，上述优先级可以是PSSCH中承载的数据信息的优先级，也可以是数据信息包含的信令信息的优先级，还可以是数据信息和与其包含的信令信息整体的优先级等，本申请实施例对此不做过多限定。
需要说明的是，优先级高低的数值是降序排列，目前标准支持SL有8个优先级别，优先级数值越小表示优先级越高，优先级数值为1表示最高优先级。在未来的标准中，对于优先级高低可能会有不同的定义，本申请实施例均适用，对此不做过多限定。
作为一种可能的实现方式，在第一终端装置确定第一优先级高于或等于第二优先级之前，方法800还包括步骤820，即第一终端装置确定传输类型为广播传输。
在广播传输场景下，SL通信时存在多终端装置对多终端装置的分布关系，但每个终端装置发送的业务优先级有区别，本申请实施例利用SL资源预约的特性，根据收发信息的优先级进行资源选择，从而可以避免半双工的问题，提高广播传输的可靠性。
作为一种可能的实现方式，在第一终端装置确定第一优先级高于或等于第二优先级之前，还可能存在预设的信道占用比例(channel ratio，CR)或信道繁忙比例(channel busy ratio，CBR)阈值TH CR/CBR。此时，第一终端装置需要确定第一终端装置的信道占用比例或信道繁忙比例小于预设比例。
本申请实施例通过预定义一个阈值TH CR/CBR，能够实现在资源不拥挤的情况下，避免半双工问题，从而提高传输的可靠性。
需要说明的是，当传输类型为单播传输或广播传输时，其也可以采用方法800进行资源的选择，其实现过程可以参照本申请实施所述，在此不做过多赘述。
本申请实施例根据第一终端装置的待传输信息和第二终端装置发送信息之间的优先级，在资源选择窗内排除第二时间单元集合对应的时频资源，从而避免半双工问题，同时提高传输的可靠性。
应理解，方法700和方法800仅仅是示例性说明，其还有可能存在，当传输类型为单 播传输或组播传输时，第一终端装置确定目的地址与第一终端装置的地址匹配的同时，也需要确定第一优先级高于或等于第二优先级，也就是说只要是在资源选择窗内排除第二时间单元集合所在时间单元上的所有子信道均属于本申请实施保护范围，本申请对此不作过多限定。
在执行上述步骤1至4，以及步骤5、步骤6和本申请实施例提供的方法中至少一种后，还会进行如下两步，以便完成最终的资源选择。
步骤7：如果候选资源集合中剩余的候选资源少于的X％，那么将预先设定的RSRP门限升高3dB，然后重复第一步至第四步，其中，X的取值可以为20、35或50。
步骤8：第一终端装置将候选资源集合汇报给高层，由高层从集合中完成最终的资源选择。
以上，结合图3至图8详细说明了本申请实施例提供的通信方法。以下，结合图9至图11详细说明本申请实施例提供的装置。
图9是本申请实施例提供的装置的示意性框图。如图9所示，该装置900可以包括处理单元910和收发单元920。
具体地，该装置900可对应于根据本申请实施例的方法300、方法700和方法800中的第一终端装置，该装置可以包括用于执行图3中的方法或图7中的方法或图8中的方法中的第一终端装置执行的方法的单元。并且，该装置900中的各单元和上述其他操作和/或功能分别为了实现图3中的方法300或图7中的方法700或图8中的方法800的相应流程。
其中，当该装置900用于执行图3中的方法300时，处理单元910可用于执行方法300中的步骤320，收发单元920可用于执行方法300中的步骤310。
当该装置900用于执行图7中的方法700时，处理单元910可用于执行方法700中的步骤720、步骤740和步骤750，收发单元920可用于执行方法700中的步骤710和步骤720。
当该装置900用于执行图8中的方法800时，处理单元910可用于执行方法800中的步骤820、步骤830和步骤840，收发单元920可用于执行方法800中的步骤810。
本申请各实施例中，收发单元在执行发送步骤时可以由发送单元代替，收发单元在执行接收步骤时可以由接收单元代替，另外，收发单元可以由收发器代替，发送单元可以由发射器代替，接收单元可以由接收器代替。
具体的，收发单元920，用于接收指示信息，该指示信息用于指示第一时间单元集合，该第一时间单元集合为第二终端装置预约的发送资源所在的时间单元集合，该指示信息承载于第一控制信息；处理单元910，用于根据该指示信息在资源选择窗内确定可用资源集合，该可用资源集合不包括第二时间单元集合对应的时频资源，该第二时间单元集合为第一时间单元集合位于该资源选择窗内的时间单元集合。
可选地，第二时间单元集合对应的时频资源包括第二时间单元集合所在的时间单元上的所有子信道，该所有子信道为资源池包括的子信道。
可选地，第一控制信息还包括传输类型和/或第一优先级，该第一优先级为第二终端装置发送信息的优先级。
可选地，该传输类型为单播传输或组播传输，第一终端装置根据指示信息在资源选择 窗内确定可用资源集合，收发单元920还用于接收第二控制信息，该第二控制信息包括第二终端装置发送信息的目的地址；处理单元910还用于确定目的地址与第一终端装置的地址匹配；处理单元910还用于确定可用资源集合，该可用资源集合为在该资源选择窗内排除第二时间单元集合对应的时频资源的资源集合。
可选地，第一终端装置根据指示信息在资源选择窗内确定可用资源集合，处理单元910还用于确定第一优先级高于或等于第二优先级，该第二优先级为第一终端装置的待传输信息的优先级；处理单元910还用于确定可用资源集合，该可用资源集合为在资源选择窗内排除第二时间单元集合对应的时频资源的资源集合。
可选地，处理单元910还用于确定该传输类型为广播传输。
可选地，处理单元910还用于确定第一终端装置的信道占用比例或信道繁忙比例小于预设比例。
可选地，第一控制信息承载于物理层侧行链路控制信道PSCCH。
可选地，第二控制信息承载于物理层侧行链路共享信道PSSCH。
图10为本申请实施例提供的装置1000的示意图，如图10所示，装置1000可以包括处理器1010(即，处理模块的一例)和存储器1020。该存储器1020用于存储指令，该处理器1010用于执行该存储器1020存储的指令，以使该装置1000实现如图3、图7或图8中对应的方法中进行资源选择执行的步骤。
进一步地，该装置1000还可以包括输入口1030(即，接收单元的一例)和输出口1040(即，发送单元的一例)。进一步地，该处理器1010、存储器1020、输入口1030和输出口1050可以通过内部连接通路互相通信，传递控制和/或数据信号。该存储器1020用于存储计算机程序，该处理器1010可以用于从该存储器1020中调用并运行该计算机程序，以控制输入口1030接收信号，控制输出口1040发送信号，完成上述方法中第一终端装置的步骤。该存储器1020可以集成在处理器1010中，也可以与处理器1010分开设置。
可选地，若该装置1000为通信设备，该输入口1030为接收器，该输出口1040为发送器。其中，接收器和发送器可以为相同或者不同的物理实体。为相同的物理实体时，可以统称为收发器。
可选地，若该装置1000为芯片或电路，该输入口1030为输入接口，该输出口1040为输出接口。
作为一种实现方式，输入口1030和输出口1040的功能可以考虑通过收发电路或者收发的专用芯片实现。处理器1010可以考虑通过专用处理芯片、处理电路、处理器或者通用芯片实现。
作为另一种实现方式，可以考虑使用通用计算机的方式来实现本申请实施例提供的通信设备。即将实现处理器1010、输入口1030和输出口1040功能的程序代码存储在存储器1020中，通用处理器通过执行存储器1030中的代码来实现处理器1010、输入口1030和输出口1040的功能。
其中，装置1000中各模块或单元可以用于执行上述方法中进行资源选择的设备(例如，用户设备)所执行的各动作或处理过程，这里，为了避免赘述，省略其详细说明。
该装置1010所涉及的与本申请实施例提供的技术方案相关的概念，解释和详细说明及其他步骤请参见前述方法或其他实施例中关于这些内容的描述，此处不做赘述。
图11为本申请提供的一种第一终端装置1100的结构示意图。为了便于说明，图11仅示出了第一终端装置的主要部件。如图11所示，第一终端装置1100包括处理器、存储器、控制电路、天线以及输入输出装置。
处理器主要用于对通信协议以及通信数据进行处理，以及对整个终端设备进行控制，执行软件程序，处理软件程序的数据，例如用于支持终端设备执行上述传输预编码矩阵的指示方法实施例中所描述的动作。存储器主要用于存储软件程序和数据，例如存储上述实施例中所描述的码本。控制电路主要用于基带信号与射频信号的转换以及对射频信号的处理。控制电路和天线一起也可以叫做收发器，主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。
当第一终端装置开机后，处理器可以读取存储单元中的软件程序，解释并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
本领域技术人员可以理解，为了便于说明，图11仅示出了一个存储器和处理器。在实际的终端设备中，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。
作为一种可选的实现方式，处理器可以包括基带处理器和中央处理器，基带处理器主要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端设备进行控制，执行软件程序，处理软件程序的数据。图11中的处理器集成了基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。本领域技术人员可以理解，终端设备可以包括多个基带处理器以适应不同的网络制式，终端设备可以包括多个中央处理器以增强其处理能力，终端设备的各个部件可以通过各种总线连接。所述基带处理器也可以表述为基带处理电路或者基带处理芯片。所述中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储单元中，由处理器执行软件程序以实现基带处理功能。
如图11所示，第一终端装置设备1100包括收发单元1110和处理单元1120。收发单元也可以称为收发器、收发机、收发装置等。可选的，可以将收发单元1110中用于实现接收功能的器件视为接收单元，将收发单元1110中用于实现发送功能的器件视为发送单元，即收发单元1110包括接收单元和发送单元。示例性的，接收单元也可以称为接收机、接收器、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
图11所示的终端装置可以执行上述中第一终端装置所执行的各动作，这里，为了避免赘述，省略其详细说明。
应理解，本申请实施例中，该处理器可以为中央处理单元(central processing unit，CPU)，该处理器还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列 (field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的随机存取存储器(random access memory，RAM)可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(souble data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
在本说明书中使用的术语“部件”、“模块”、“系统”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件、或执行中的软件。例如，部件可以是但不限于，在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序和/或计算机。通过图示，在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程和/或执行线程中，部件可位于一个计算机上和/或分布在2个或更多个计算机之间。此外，这些部件可从在上面存储有各种数据结构的各种计算机可读介质执行。部件可例如根据具有一个或多个数据分组(例如来自与本地系统、分布式系统和/或网络间的另一部件交互的二个部件的数据，例如通过信号与其它系统交互的互联网)的信号通过本地和/或远程进程来通信。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络 单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (21)

  1. 一种资源选择的方法，其特征在于，包括：
    第一终端装置接收指示信息，所述指示信息用于指示第一时间单元集合，所述第一时间单元集合为第二终端装置预约的发送资源所在的时间单元集合，所述指示信息承载于第一控制信息；
    所述第一终端装置根据所述指示信息在资源选择窗内确定可用资源集合，所述可用资源集合不包括第二时间单元集合对应的时频资源，所述第二时间单元集合为所述第一时间单元集合位于所述资源选择窗内的时间单元集合。
  2. 如权利要求1所述的方法，其特征在于，所述第二时间单元集合对应的时频资源包括所述第二时间单元集合所在的时间单元上的所有子信道，所述所有子信道为资源池包括的子信道。
  3. 如权利要求1所述的方法，其特征在于，所述第一控制信息还包括传输类型和/或第一优先级，所述第一优先级为所述第二终端装置发送信息的优先级。
  4. 如权利要求3所述的方法，其特征在于，所述传输类型为单播传输或组播传输，所述第一终端装置根据所述指示信息在资源选择窗内确定可用资源集合，包括：
    所述第一终端装置接收第二控制信息，所述第二控制信息包括所述第二终端装置发送信息的目的地址；
    所述第一终端装置确定所述目的地址与所述第一终端装置的地址匹配；
    所述第一终端装置确定所述可用资源集合，所述可用资源集合为在所述资源选择窗内排除所述第二时间单元集合对应的时频资源的资源集合。
  5. 如权利要求3所述的方法，其特征在于，所述第一终端装置根据所述指示信息在资源选择窗内确定可用资源集合，包括：
    所述第一终端装置确定所述第一优先级高于或等于第二优先级，所述第二优先级为所述第一终端装置的待传输信息的优先级；
    所述第一终端装置确定所述可用资源集合，所述可用资源集合为在所述资源选择窗内排除所述第二时间单元集合对应的时频资源的资源集合。
  6. 如权利要求5所述的方法，其特征在于，所述方法还包括：
    所述第一终端装置确定所述传输类型为广播传输。
  7. 如权利要求5或6所述的方法，其特征在于，所述方法还包括：
    所述第一终端装置确定所述第一终端装置的信道占用比例或信道繁忙比例小于预设比例。
  8. 如权利要求1至7中任一项所述的方法，其特征在于，所述第一控制信息承载于物理层侧行链路控制信道PSCCH。
  9. 如权利要求4所述的方法，其特征在于，所述第二控制信息承载于物理层侧行链路共享信道PSSCH。
  10. 一种资源选择的装置，其特征在于，包括：
    收发单元，用于接收指示信息，所述指示信息用于指示第一时间单元集合，所述第一 时间单元集合为第二终端装置预约的发送资源所在的时间单元集合，所述指示信息承载于第一控制信息；
    处理单元，用于根据所述指示信息在资源选择窗内确定可用资源集合，所述可用资源集合不包括第二时间单元集合对应的时频资源，所述第二时间单元集合为所述第一时间单元集合位于所述资源选择窗内的时间单元集合。
  11. 如权利要求10所述的装置，其特征在于，所述第二时间单元集合对应的时频资源包括所述第二时间单元集合所在的时间单元上的所有子信道，所述所有子信道为资源池包括的子信道。
  12. 如权利要求10所述的装置，其特征在于，所述第一控制信息还包括传输类型和/或第一优先级，所述第一优先级为所述第二终端装置发送信息的优先级。
  13. 如权利要求12所述的装置，其特征在于，所述传输类型为单播传输或组播传输，所述第一终端装置根据所述指示信息在资源选择窗内确定可用资源集合，所述收发单元还用于接收第二控制信息，所述第二控制信息包括所述第二终端装置发送信息的目的地址；
    所述处理单元还用于确定所述目的地址与所述第一终端装置的地址匹配；
    所述处理单元还用于确定所述可用资源集合，所述可用资源集合为在所述资源选择窗内排除所述第二时间单元集合对应的时频资源的资源集合。
  14. 如权利要求12所述的装置，其特征在于，所述第一终端装置根据所述指示信息在资源选择窗内确定可用资源集合，所述处理单元还用于确定所述第一优先级高于或等于第二优先级，所述第二优先级为所述第一终端装置的待传输信息的优先级；
    所述处理单元还用于所述确定可用资源集合，所述可用资源集合为在所述资源选择窗内排除所述第二时间单元集合对应的时频资源的资源集合。
  15. 如权利要求14所述的装置，其特征在于，所述处理单元还用于确定所述传输类型为广播传输。
  16. 如权利要求14或15所述的装置，其特征在于，所述处理单元还用于确定所述第一终端装置的信道占用比例或信道繁忙比例小于预设比例。
  17. 如权利要求10至16中任一项所述的装置，其特征在于，所述第一控制信息承载于物理层侧行链路控制信道PSCCH。
  18. 如权利要求13所述的装置，其特征在于，所述第二控制信息承载于物理层侧行链路共享信道PSSCH。
  19. 一种通信装置，其特征在于，包括：
    处理器，所述处理器用于从存储器调用并运行计算机程序，使得所述通信装置执行如权利要求1至9中任一项所述的方法。
  20. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行权利要求1至9中任一项所述的方法。
  21. 一种芯片系统，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片系统的通信设备执行权利要求1至9中任一项所述的方法。
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