WO2020143065A1 - 侧行通信的方法、终端设备和网络设备 - Google Patents

侧行通信的方法、终端设备和网络设备 Download PDF

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Publication number
WO2020143065A1
WO2020143065A1 PCT/CN2019/071497 CN2019071497W WO2020143065A1 WO 2020143065 A1 WO2020143065 A1 WO 2020143065A1 CN 2019071497 W CN2019071497 W CN 2019071497W WO 2020143065 A1 WO2020143065 A1 WO 2020143065A1
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WIPO (PCT)
Prior art keywords
time
pscch
domain
frequency
terminal device
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PCT/CN2019/071497
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English (en)
French (fr)
Inventor
赵振山
卢前溪
林晖闵
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Oppo广东移动通信有限公司
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to CN201980002836.6A priority Critical patent/CN110731117B/zh
Priority to CN202011250086.5A priority patent/CN112333827B/zh
Priority to KR1020217020682A priority patent/KR102705649B1/ko
Priority to AU2019421242A priority patent/AU2019421242A1/en
Priority to EP19909129.9A priority patent/EP3886348B1/en
Priority to JP2021538330A priority patent/JP7434331B2/ja
Priority to PCT/CN2019/071497 priority patent/WO2020143065A1/zh
Priority to EP24182723.7A priority patent/EP4407919A3/en
Publication of WO2020143065A1 publication Critical patent/WO2020143065A1/zh
Priority to US17/366,593 priority patent/US11632780B2/en
Priority to US18/181,724 priority patent/US20230217445A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource

Definitions

  • Embodiments of the present application relate to the field of communications, and in particular, to a side communication method, terminal device, and network device.
  • the physical side control channel Physical Sidelink Control Channel
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Control Channel
  • Long Term Evaluation different multiplexing structure in V2X, in the multiplexing structure adopted by NR-V2X, how to transmit PSCCH is a problem to be solved.
  • Embodiments of the present application provide a method, a terminal device, and a network device for side communication, which are beneficial to reduce the complexity of blindly detecting PSCCH by the terminal device.
  • a method for side communication includes: a terminal device determining a time-frequency resource of a physical side control channel PSCCH in a first time-frequency unit; the terminal device is on the time-frequency resource , Receive or send the PSCCH.
  • a method for side communication includes: a network device determines a first parameter; the network device sends the first parameter to a terminal device, and the first parameter is used for the terminal device Determine the starting position of the time-domain symbol of the physical side control channel PSCCH in a time-frequency unit.
  • a terminal device for performing the method in the above-mentioned first aspect or various implementations thereof.
  • the terminal device includes a functional module for performing the method in the above-mentioned first aspect or various implementations thereof.
  • a network device for performing the method in the above-mentioned second aspect or various implementations thereof.
  • the network device includes a functional module for performing the method in the second aspect or its implementations.
  • a terminal device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the first aspect or its various implementations.
  • a network device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the second aspect or its implementations.
  • a chip is provided for implementing any one of the above-mentioned first to second aspects or the method in each implementation manner.
  • the chip includes: a processor for calling and running a computer program from the memory, so that the device installed with the chip executes any one of the first aspect to the second aspect described above or its respective implementations method.
  • a computer-readable storage medium for storing a computer program, which causes the computer to execute the method in any one of the first to second aspects or the various implementations thereof.
  • a computer program product which includes computer program instructions, which cause the computer to execute the method in any one of the above first to second aspects or various implementations thereof.
  • a computer program which, when run on a computer, causes the computer to execute the method in any one of the above first to second aspects or in various implementations thereof.
  • the terminal device can first determine the time-frequency resource of the PSCCH in the first time-frequency unit, and detect the PSCCH on the determined time-frequency resource, so that the terminal device as the receiving end can clearly know that the PSCCH is in a time-frequency unit Specific location, thereby reducing the complexity of blindly detecting PSCCH in terminal equipment.
  • FIG. 1 is a schematic diagram of a side communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a side communication system provided by an embodiment of the present application.
  • FIG. 3 is a schematic block diagram of a side link data transmission method provided by an embodiment of the present application.
  • FIG. 4 is a schematic block diagram of a resource pool configuration of control information and data in LTE-V2X.
  • FIG. 5 is a schematic diagram of a resource allocation method in NR-V2X.
  • FIG. 6 is a schematic diagram of two structures used for control information and data transmission in NR-V2X.
  • FIG. 7 is a schematic diagram of various substructures included in structure 2 in NR-V2X.
  • FIG. 8 is a schematic block diagram of a method for side communication provided by an embodiment of the present application.
  • FIG. 9 is another schematic block diagram of a method for side communication provided by an embodiment of the present application.
  • FIG. 10 is a schematic block diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 11 is a schematic block diagram of a network device provided by an embodiment of the present application.
  • FIG. 12 is another schematic block diagram of the terminal device provided by the embodiment of the present application.
  • FIG. 13 is another schematic block diagram of a network device provided by an embodiment of the present application.
  • FIG. 14 is a schematic block diagram of a chip provided by an embodiment of the present application.
  • 15 is a schematic block diagram of a communication system provided by an embodiment of the present application.
  • GSM Global System of Mobile
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code
  • GPRS general packet radio service
  • LTE Long-term evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • NR New Radio
  • 5G System etc.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems based on non-orthogonal multiple access technology, such as sparse code multiple access (Sparse Code Multiple Access, SCMA) system and low density signature (Low Density (Signature, LDS) system, etc.
  • SCMA Sparse Code Multiple Access
  • LDS Low Density
  • SCMA system and LDS system can also be called other names in the communication field;
  • technical solutions of the embodiments of the present application can be applied to multi-carrier using non-orthogonal multiple access technology Transmission systems, such as Orthogonal Frequency Division Multiplexing (OFDM), Filter Bank Multi-Carrier (FBMC), Generalized Frequency Division Multiplexing (Generalized) Frequency Division Multiplexing (GFDM), Filtered-OFDM (F-OFDM) system, etc.
  • OFDM Orthogonal Frequency Division Multiplexing
  • FBMC Filter Bank Multi-Carrier
  • Generalized Frequency Division Multiplexing Generalized Frequency Division Multiplexing
  • GFDM Generalized Frequency Division Multiplexing
  • F-OFDM Filtered-OFDM
  • the terminal equipment in the embodiments of the present application may refer to user equipment (User Equipment), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless Communication equipment, user agent or user device.
  • Access terminals can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital processing (Personal Digital Assistant (PDA), wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or public land mobile communication networks (PLMN) in the future evolution Terminal equipment and the like are not limited in the embodiments of the present application.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • PDA Personal Digital Assistant
  • wireless communication Functional handheld devices computing devices or other processing devices connected to wireless modems
  • in-vehicle devices wearable devices
  • the network device in the embodiment of the present application may be a device for communicating with a terminal device.
  • the network device may be a base station (Base Transceiver Station, BTS) in GSM or CDMA, or a base station (NodeB, NB in WCDMA system) ), it can also be an evolved base station (Evolutional NodeB, eNB or eNodeB) in the LTE system, it can also be a wireless controller in the cloud radio access network (Cloud Radio Access Network, CRAN) scenario, or the network equipment can be
  • the relay station, the access point, the in-vehicle device, the wearable device, the network device in the future 5G network or the network device in the future evolved PLMN network, etc. are not limited in the embodiments of the present application.
  • FIG. 1 and 2 are schematic diagrams of an application scenario according to an embodiment of the present application.
  • FIG. 1 exemplarily shows one network device and two terminal devices.
  • the wireless communication system may include multiple network devices and each network device may include other numbers of terminal devices within the coverage area.
  • MME Mobile Management Entity
  • S-GW Serving Gateway
  • P-GW Packet Data Network Gateway
  • the embodiments of the present application are not limited to this.
  • the terminal device 20 and the terminal device 30 can communicate in a device-to-device (D2D) communication mode.
  • D2D communication the terminal device 20 and the terminal device 30 pass a D2D link, that is, a side link ( Sidelink (SL) communicates directly.
  • Sidelink (SL) Sidelink
  • the terminal device 20 and the terminal device 30 directly communicate through the side link.
  • the terminal device 20 and the terminal device 30 communicate through a side link, and transmission resources are allocated by the network device; in FIG. 2, the terminal device 20 and the terminal device 30 pass a side link.
  • the transmission resources are selected by the terminal equipment, and there is no need for the network equipment to allocate transmission resources.
  • the D2D communication mode can be applied to vehicle-to-vehicle (V2V) communication or vehicle-to-other equipment (Vehicle to Everything, V2X) communication.
  • V2X communication X can refer to any device with wireless reception and transmission capabilities, such as but not limited to slow-moving wireless devices, fast-moving in-vehicle devices, or network control nodes with wireless transmission and reception capabilities.
  • the embodiment of the present application is mainly applied to the scenario of V2X communication, but can also be applied to any other D2D communication scenario, which is not limited in this embodiment of the present application.
  • LTE-V2X is standardized, and two transmission modes are defined, namely transmission mode 3 (mode 3) and transmission mode 4 (mode 4).
  • the transmission resources of the terminal equipment using the transmission mode 3 are allocated by the base station, and the terminal equipment transmits data on the side link according to the resources allocated by the base station; the base station can allocate the resources for a single transmission to the terminal equipment or can be the terminal.
  • the device allocates semi-statically transmitted resources. If the terminal device using the transmission mode 4 has a listening capability, data is transmitted by means of sensing and reservation. If the terminal device does not have a listening capability, the transmission resource is randomly selected in the resource pool.
  • a terminal device with listening capability obtains an available resource set in the resource pool by listening, and the terminal device randomly selects a resource from the set for data transmission. Because the services in the IoV system have periodic characteristics, the terminal device usually adopts a semi-static transmission method, that is, after the terminal device selects a transmission resource, it will continue to use the resource in multiple transmission cycles, thereby reducing resource re-use Selection and the probability of resource conflicts. The terminal device will carry the information for reserving the next transmission resource in the control information transmitted this time, so that other terminal devices can determine whether this resource is reserved and used by the terminal device by detecting the control information of the terminal device. The purpose of reducing resource conflicts.
  • the data transmitted by the sidelink adopts the sidelink control information (Sidelink Control Information, SCI) + data transmission method as shown in FIG. 3, where the SCI carries what is needed to demodulate the data Information, such as modulation and coding strategy (Modulation and Coding Scheme, MCS), time-frequency resource allocation information, priority information, etc., the terminal device at the receiving end obtains the time-frequency resource location of the data by detecting the SCI, and in the corresponding time-frequency resource On the data.
  • the SCI is carried on the PSCCH and the data is carried on the PSSCH.
  • the resource pool of the PSCCH and the resource pool of the PSSCH are pre-configured by the protocol or the network.
  • the terminal device at the sending end sends the PSCCH and PSSCH in the corresponding resource pool respectively.
  • the terminal device at the receiving end first
  • the PSCCH is blindly detected in the PSCCH resource pool, and according to the indication information in the SCI carried by the PSCCH, the PSSCH corresponding to the SCI is detected on the corresponding time-frequency resource in the PSSCH resource pool.
  • the adjacent mode refers to that the control information and its corresponding data are adjacent in the frequency domain.
  • the overall system bandwidth is sub-band granularity, and each sub-band contains multiple consecutive physical resource blocks (Physical Resource Block, PRB) ,
  • PRB Physical Resource Block
  • the first and second PRBs in each subband are available control resources (each control information occupies two adjacent PRBs in the frequency domain), and the remaining PRBs are available data resources.
  • the data resources and control resources are There is a one-to-one correspondence, and the starting position of the data resource is determined by its corresponding control resource.
  • Data resources can occupy one subband (such as UE1 in Figure 4), or can span multiple subbands (such as UE2 in Figure 4).
  • the data occupies multiple subbands
  • the data is continuous in the frequency domain in the multiple subbands
  • Can occupy control resources in other subbands
  • the control information corresponding to the data is located in the control resources in the first subband.
  • the data of UE2 occupies two adjacent subbands, so their correspondence
  • the control information of is in the control resource of the first subband.
  • NR-V2X In NR-V2X, it is necessary to support automatic driving, so it puts forward higher requirements for data interaction between vehicles, such as higher throughput, lower delay, higher reliability, greater coverage, More flexible resource allocation, etc.
  • mode 1 is the network to allocate transmission resources for the terminal (similar to mode 3 in LTE-V2X)
  • mode 2 is the terminal selection Transmission resources, in mode 2
  • modes 1 and mode 2 include but are not limited to the following modes:
  • mode 2a The terminal autonomously selects transmission resources (similar to mode 4 in LTE-V2X); for example, the terminal autonomously selects resources in a pre-configured or network-configured resource pool (the resources can be selected in a random manner, or through listening Way to select resources).
  • the terminal assists other terminals in selecting resources; for example, the first terminal sends auxiliary information to the second terminal.
  • the auxiliary information may include but is not limited to: available time-frequency resource information, available transmission resource set information, channel measurement information and Channel quality information (such as channel state information (Channel State Information, CSI), channel quality indicator (Channel Quality Indicator, CQI), precoding matrix indicator (Precoding Matrix Indicator, PMI), rank indicator (RI), reference signal Received power (ReferenceSignalReceivingPower, RSRP), reference signal received quality (ReferenceSignalReceivingQuality, RSRQ), received signal strength indication (ReceivedSignalStrengthIndicator, RSSI), road loss information, etc.).
  • Channel State Information such as channel state information (Channel State Information, CSI), channel quality indicator (Channel Quality Indicator, CQI), precoding matrix indicator (Precoding Matrix Indicator, PMI), rank indicator (RI), reference signal Received power (ReferenceSignal
  • the terminal selects resources among the transmission resources configured for it; for example, the network configures multiple transmission resources for each terminal. When the terminal has side data transmission, it selects one transmission resource from the multiple transmission resources configured by the network Perform data transfer.
  • the first terminal allocates transmission resources to the second terminal; for example, the first terminal is the group leader of the group communication, the second terminal is a group member of the group, and the first terminal directly allocates the side terminal transmission to the second terminal Time-frequency resources.
  • UE1, UE2, and UE3 form a communication group.
  • UE1 is the group leader and has resource management, allocation, and control functions.
  • UE2 and UE3 are group members.
  • UE1 can allocate sidelines for UE2 and UE3. For link transmission resources, UE2 and UE3 perform sidelink transmission on the resources allocated by UE1.
  • the side link control information SCI and its corresponding data adopt a new multiplexing structure, as shown in Figure 6 and Figure 7.
  • C represents control information
  • D represents data, that is, in a subframe or time slot
  • the control information occupies part of the time domain symbol
  • the terminal device can obtain the indication information of the demodulated data by detecting the control information, so that the data can be detected.
  • the control information occupies only part of the time-domain symbols to achieve fast demodulation of the control information, thereby achieving the purpose of reducing delay.
  • the multiplexing structure adopted by NR-V2X is mainly divided into structure 1 and structure 2.
  • Structure 1 refers to that control information can be transmitted before data. Control information and data occupy different time domain resources. Further, control The information and the data scheduled by the control information can be transmitted in the same time slot or different time slots; structure 2 means that the time domain resources of the control information can partially overlap with the time domain resources of the data.
  • the structure 2 may include 4 seed structures as shown in FIG. 7: sub-structure 2-1, sub-structure 2-2, sub-structure 2-3, and sub-structure 2-4.
  • PSCCH time domain resources can occupy any time domain symbol in a subframe or a time slot
  • PSCCH frequency domain resources can also occupy system bandwidth or a bandwidth part (BandwithPart, BWP ) Part of the subband, how to determine the time-frequency resources occupied by the PSCCH is a problem to be solved.
  • FIG. 8 is a schematic block diagram of a side communication method 100 according to an embodiment of the present application. The method may be performed by a terminal device as a receiving end in FIG. 1 or FIG. 2, as shown in FIG. 8, the method 100 includes some or all of the following:
  • the terminal device determines the time-frequency resource of the physical side control channel PSCCH in the first time-frequency unit.
  • the terminal device receives or sends the PSCCH on the time-frequency resource.
  • the first time-frequency unit may include a time unit in the time domain, and the time unit may be a subframe or a time slot, or may be a time unit composed of a specific number of symbols in the time domain.
  • the first time-frequency unit may include a frequency-domain unit in the frequency domain.
  • the frequency-domain unit may be a system bandwidth, a bandwidth (Part) or a frequency-domain unit composed of a specific number of subbands.
  • the transmission of side data needs to be scheduled by the SCI, that is, the SCI carries the information required to demodulate the data, and the SCI is carried on the PSCCH.
  • the terminal device is a The time-frequency unit is basically transmitted.
  • the terminal device as the sending end needs to first determine the time-frequency resource used to transmit the PSCCH in the current time-frequency unit.
  • the time-frequency resource includes time-domain resources and/or frequency. Domain resources, and then the terminal device at the sending end can transmit the PSCCH on the determined time-frequency resources.
  • the terminal device as the receiving end also needs to first determine which time-frequency resources in the current time-frequency unit to receive or detect the PSCCH, and then receive or detect the PSCCH on the corresponding time-frequency resources.
  • the time-frequency resource of the PSCCH is the sending resource of the PSCCH; for the terminal device at the receiving end, the time-frequency resource of the PSCCH is the receiving resource of the PSCCH.
  • the solution of the embodiments of the present application is applicable to the multiplexing structure adopted for transmitting PSCCH and PSSCH in FIG. 6 or FIG. 7, for structure 1, the PSCCH and the PSSCH scheduled by the PSCCH occupy different time domain resources, and For structure 2, the time domain resources occupied by the PSSCH scheduled by the PSCCH are larger than the time domain resources occupied by the PSCCH.
  • determining the time-frequency resources of the PSCCH in one time-frequency unit may include determining the time-domain resources and/or frequency-domain resources of the PSCCH in a time-frequency unit.
  • determining the time-domain resource of the PSCCH in a time-frequency unit may include determining the position of the starting time-domain symbol position, the ending time-domain symbol position in the PSCCH in a time-frequency unit, and the number of occupied time-domain symbols At least one.
  • the start time domain symbol position, end time domain symbol position or the number of occupied time domain symbols of a PSCCH in a time-frequency unit can be configured by protocol preconfiguration information (such as protocol pre-agreed), and the configuration of the network device
  • the information for example, the network device is configured through broadcast messages, radio resource control (Radio Resource Control) signaling, or control information) or may be determined by other terminal devices.
  • the other terminal device may be a group head in the communication group where the terminal device is located.
  • the position of the start time domain symbol or the end time domain symbol of the PSCCH in a time-frequency unit can be based on the index information of the time domain symbol or the offset from the specific time domain symbol.
  • the protocol stipulates that the starting time domain symbol position of the PSCCH in a time-frequency unit is the first time-domain symbol, then the protocol preconfiguration information may include an indication field to indicate the first time-domain in a time-frequency unit The index information of the symbol.
  • the configuration information may include an indication field to indicate the last time domain in a time-frequency unit The index value of the symbol.
  • the network device configures the terminal device with a PSCCH in a time-frequency unit
  • the offset of the starting time-domain symbol position relative to the fourth time-domain symbol is 2
  • the terminal device can learn that the PSCCH is in a time-frequency unit
  • the starting time domain symbol in is the sixth time domain symbol.
  • the protocol stipulates in advance that the offset of the end time-domain symbol position of the PSCCH in a time-frequency unit relative to the fourth time-domain symbol is -2, then the terminal device can know the end of the PSCCH in a time-frequency unit
  • the time-domain symbol position is the second time-domain symbol.
  • the number of time-domain symbols occupied by the PSCCH in a time-frequency unit can be indicated by A bits. For example, if the maximum number of time-domain symbols occupied by the PSCCH is 4, then 2 bits can be used to indicate the number of time-domain symbols occupied by the PSCCH in a time-frequency unit.
  • the terminal device may also determine the starting time domain symbol position of the PSCCH in a time slot or subframe according to the first parameter.
  • the first parameter may be determined by protocol preconfiguration information, network device configuration information, or other terminal device configuration information.
  • the first parameter may be related to the number of time-domain symbols that the terminal device needs to listen to or measure in a time-frequency unit.
  • the terminal device needs to perform interception or measurement first, and then decide whether to send the PSCCH and/or PSSCH according to the result of the interception or measurement.
  • the terminal device needs to listen in a time-frequency unit Or the number of measured time-domain symbols is P, and the terminal device can determine the start of the PSCCH in a time-frequency unit according to the number of time-domain symbols P to be monitored or measured (that is, the first parameter) Time domain symbol position.
  • the starting symbol position is P+1, or P+2.
  • listening or measuring usually starts from the first symbol in a time-frequency unit, and the number of time-domain symbols that the terminal device needs to listen or measure in a time-frequency unit is P, which can also be understood as , The terminal equipment needs to listen or measure on the first P time-domain symbols in a time-frequency unit.
  • the terminal equipment wants to send the PSCCH and/or PSSCH, and it will determine whether the time slot or subframe can be used to send the PSCCH and/or PSSCH according to the results of listening or measurement.
  • Different terminal equipment may have different Listening or measuring parameters.
  • the network device may configure different listening parameters for different terminal devices.
  • the parameter may be, for example, the number of time-domain symbols whose signal energy measured by the terminal device is lower than a threshold value.
  • the terminal device initializes the parameter according to the network configuration information. For example, the parameter initialization value is Q. When the energy on the time domain symbol measured by the terminal device is lower than the threshold, the parameter is decremented by 1.
  • the terminal device When the terminal device measures the time domain symbol on the time domain symbol When the energy is higher than or equal to the threshold, the parameter remains unchanged, and the energy of the next time-domain symbol is continuously measured. When the parameter is reduced to 0, the terminal device will send the PSCCH and/or PSSCH on the subsequent time-domain symbol.
  • the parameter configured by different terminal devices may be different, for example, for the first terminal device, the parameter may be 2, for the second terminal device, the parameter may be 3. .
  • the first terminal device When the first terminal device listens in a time-frequency unit or measures that the energy on two time-domain symbols is lower than the threshold, the first terminal device can seize the next time-domain symbol for transmission; when the second terminal device When it is intercepted or measured in one time-frequency unit that the energy on three time-domain symbols is lower than the threshold, the second terminal device can preempt the next time-domain symbol for transmission.
  • the terminal device whose listening parameter is reduced to 0 first can preempt resources and send.
  • a time-frequency unit if at least one terminal device sends PSCCH and PSSCH, because different terminal devices may need to listen or measure the number of time-domain symbols that are different, different terminal devices determine that they can be used to send PSCCH
  • the starting time-domain symbol may also be different.
  • the pre-configuration information of the protocol or the configuration information of the network device may be used so that different terminal devices obtain the same first parameter.
  • different terminal devices can determine to start sending or receiving the PSCCH at the same starting time domain symbol position of a time-frequency unit according to the same rule.
  • the first parameter may be the position K of the first time-domain symbol used to receive the PSCCH in a time-frequency unit, where K is an integer. That is to say, for all terminal devices at the sending end, the PSCCH can only be sent from the first parameter or the corresponding time-domain symbol after the first parameter; and for all terminal devices at the receiving end, it can only be sent from the first
  • the PSCCH is received or detected on the corresponding time-domain symbol after a parameter or the first parameter.
  • the terminal device can directly determine the time-domain symbol position corresponding to K as the starting time-domain symbol position of the PSCCH in a time-frequency unit, and then the terminal device can start sending from the time-domain symbol corresponding to K in a time-frequency unit Or receive PSCCH.
  • the terminal device may start to send or receive the PSCCH from the third time-domain symbol in a time-frequency unit, or the terminal device may also start from a The fourth and fifth time-domain symbols in the time-frequency unit start transmitting or receiving the PSCCH, as long as the terminal device does not start transmitting or receiving the PSCCH from the time-domain symbol before the time-domain symbol corresponding to K.
  • K may be the maximum value in the position of the starting time-domain symbol corresponding to at least one terminal device in a time-frequency unit that can be used to transmit the PSCCH. Because different terminal devices need to listen or measure different numbers of time-domain symbols, different terminal devices can preempt the start time-domain symbol position used to transmit PSCCH in a time-frequency unit, which increases the number of terminals at the receiving end. The device detects the complexity of the PSCCH, that is, the terminal device needs to detect the PSCCH on all possible time-domain symbols.
  • terminal device 1 can be used to transmit the first time domain symbol position of PSCCH is 1
  • terminal device 2 can be used to transmit PSCCH first time domain symbol position is 2
  • terminal device 3 can be used to transmit PSCCH A time-domain symbol position is 3.
  • the time-domain symbol position needs to be 1, 2, 3 time domain symbols began to receive or detect.
  • the terminal device serving as the sending end among the multiple terminal devices can be determined from The PSCCH starts to be sent at the time-domain symbol position, and the terminal device as the receiving end can start to detect the PSCCH from the determined time-domain symbol position, instead of detecting the PSCCH on all possible time-domain symbols in a time-frequency unit.
  • the network device may configure terminal device 1, terminal device 2, terminal device 3, and terminal device 4 respectively when terminal device 1, terminal device 2, and terminal device 3 can be used to transmit the first of PSCCH
  • the maximum value of the domain symbol position 3 is the starting time domain symbol position of sending or receiving the PSCCH, so no matter which terminal device 1, terminal device 2, or terminal device 3 is the PSCCH sent by the terminal device, as the receiving terminal device 4 Both can receive or detect the PSCCH from the time-domain symbol with the time-domain symbol position of 3.
  • the first parameter may be the maximum value M of the number of time-domain symbols to be monitored or measured in a time-frequency unit, where M is an integer. That is to say, for all terminal devices at the sending end, the PSCCH can only be sent from the corresponding time-domain symbol after the first parameter; and for all terminal devices at the receiving end, they can only correspond to after the first parameter. PSCCH is received or detected on the time-domain symbol of.
  • the terminal device may directly determine the starting time-domain symbol position of the PSCCH in a time-frequency unit as the time-domain symbol position corresponding to (M+i), and then the terminal device may follow the time in a time-frequency unit
  • the PSCCH starts to be received or sent on the time-domain symbol corresponding to the position of the domain symbol (M+i).
  • i is a positive integer
  • i can be determined according to the subcarrier interval, and different subcarrier intervals correspond to different values of i.
  • i can be determined by protocol preconfiguration information, network device configuration information, or other terminal device configuration information.
  • the time domain symbols (M+1) to (M+i-1) can be used for the terminal device to perform transmission/reception conversion and/or transmission/reception conversion.
  • at least one time domain symbol is required for the terminal device to perform transmission/reception conversion and/or transmission/reception conversion.
  • i can be 3, where the time domain symbols (M+1), (M+2) can be used for terminal device transmission and reception conversion; and for a subcarrier spacing of 30 kHz, i can be 2, where The time domain symbol (M+1) can be used for terminal equipment to perform transceiving conversion; for a subcarrier interval of 15 kHz, i can be 1, wherein the time domain symbol (M+1) can be used for terminal equipment to perform transceiving conversion.
  • M may be the maximum value of the number of time-domain symbols that need to be listened to corresponding to at least one terminal device in one time-frequency unit. Since the number of time-domain symbols that different terminal devices need to listen or measure is different, if the maximum value of the number of time-domain symbols that multiple terminal devices need to listen or measure in a time-frequency unit can be determined as M, then Among the multiple terminal devices, the terminal device that is the receiving end can determine the position of the starting time-domain symbol used to transmit the PSCCH in a time-frequency unit according to the same rules, and then can detect the PSCCH from the determined time-domain symbol. It is no longer necessary to detect PSCCH on all possible time-domain symbols in a time-frequency unit.
  • terminal device 1 needs to listen to one time-domain symbol
  • terminal device 2 needs to listen to two time-domain symbols
  • terminal device 3 needs to listen to three time-domain symbols.
  • determining the time-frequency resource of the PSCCH in a time-frequency unit may further include determining any two of the frequency-domain start position, the frequency-domain end position, and the frequency-domain resource length of the PSCCH in a time-frequency unit.
  • the frequency domain start position, frequency domain end position, or frequency domain resource length of the PSCCH in a time-frequency unit can be configured by protocol preconfiguration information (for example, the protocol is pre-agreed), and configuration information of the network device (for example, network device It is determined by broadcast messages, radio resource control (Radio Resource Control) signaling, or control information, or can also be determined by the configuration information of the terminal device in the communication group where the terminal device is located.
  • protocol preconfiguration information for example, the protocol is pre-agreed
  • configuration information of the network device for example, network device It is determined by broadcast messages, radio resource control (Radio Resource Control) signaling, or control information, or can also be determined by the configuration information of the terminal device in the communication group where the terminal device is located.
  • the frequency domain start position or frequency domain end position of the PSCCH in a unit can be represented by index information of the frequency domain unit or an offset relative to a specific frequency domain unit.
  • the frequency domain start position or frequency domain end position of the PSCCH may be indicated by the index information of the resource block or subband or resource block group.
  • the frequency domain start position or frequency domain end position of the PSCCH can be represented by an offset relative to a specific frequency domain unit.
  • the specific frequency domain unit may be: the start position of the bandwidth, the start position of the BWP, the start position of the resource pool, the carrier center frequency domain position, the lowest frequency domain position of the synchronization signal, and the physical side broadcast channel (Physical sidelink broadcast channel) , PSBCH) lowest frequency domain position.
  • the physical side broadcast channel Physical sidelink broadcast channel
  • the frequency domain resource length of the PSCCH in a time-frequency unit may be represented by frequency domain resource size indication information.
  • the number of frequency domain units occupied by the PSCCH is indicated by B bits, and the frequency domain unit may be a resource block, a subband, or a group of resource blocks.
  • the terminal device may also determine the frequency domain resource length of the PSCCH in a time-frequency unit according to the aggregation level of the PSCCH to be transmitted.
  • the mapping relationship between different aggregation levels and the frequency domain resource length can be configured through preconfiguration information or network configuration information.
  • the terminal device at the sending end can determine the PSCCH in a time-frequency unit according to the current aggregation level of the PSCCH to be transmitted and the mapping relationship The length of the frequency domain resource in.
  • the terminal device at the receiving end knows the aggregation level of the PSCCH to be received, the terminal device determines the frequency domain resource length of the PSCCH according to the aggregation level and the mapping relationship; if the terminal device at the receiving end does not know the aggregation level of the PSCCH to be received, the The terminal device needs to determine the length of the frequency domain resource of the PSCCH corresponding to each aggregation level according to each of the possible aggregation levels, and determine the PSCCH corresponding to each aggregation level according to the mapping relationship, and detect the PSCCH according to the length of the frequency domain resource, if the detection fails , The length of the frequency domain resource of the PSCCH will be re-determined according to the next aggregation level and the PSCCH will be re-detected. If the detection is successful, the aggregation level used at this time is the aggregation level used by the PSCCH, and the frequency domain of the PSCCH The resource length is the frequency domain resource length of the PS
  • various information and parameters for determining the time-domain resource or the frequency-domain resource of the PSCCH may be determined through protocol pre-defined (ie, pre-configured information) or network configuration information.
  • the resource pool of the PSCCH is pre-defined through the protocol or the network is configured, and the configuration information of the resource pool includes the above-mentioned various information or parameters.
  • the network device may transmit configuration information through broadcast information, RRC signaling, downlink control signaling, and the like.
  • the configuration information configures at least one PSCCH resource pool, and the configuration information of the resource pool includes the foregoing various information or parameters.
  • the network device configures at least one BWP, and the configuration information of the BWP includes the foregoing various information or parameters.
  • FIG. 9 is a schematic block diagram of a side communication method 200 according to an embodiment of the present application. As shown in FIG. 9, the method 300 includes some or all of the following:
  • the network device determines the first parameter
  • the network device sends the first parameter to the terminal device, where the first parameter is used by the terminal device to determine a time domain symbol start position of the physical side row control channel PSCCH in a time-frequency unit.
  • the determining of the first parameter by the network device includes: the network device acquiring the number of time-domain symbols that need to be configured for at least one terminal device in a time-frequency unit and need to be listened to; The network device determines the maximum value K of the number of time-domain symbols of the at least one terminal device that needs to be listened to as the first parameter, and K is an integer.
  • the determining of the first parameter by the network device includes: the network device acquiring the position of the starting time domain symbol configured for at least one terminal device in a time-frequency unit that needs to transmit the PSCCH The network device determines the maximum value M in the starting time domain symbol position of the at least one terminal device that can be used to transmit the PSCCH as the first parameter, and M is an integer.
  • the method further includes: the network device sends at least one of the following information to the terminal device: the starting time domain symbol position of the PSCCH in a time-frequency unit , The end time-domain symbol position of the PSCCH in a time-frequency unit, the number of time-domain symbols occupied by the PSCCH in a time-frequency unit, the frequency domain starting position of the PSCCH in a time-frequency unit, the PSCCH The end position of the frequency domain in a time-frequency unit and the length of the frequency domain resource of the PSCCH in a time-frequency unit.
  • the starting time-domain symbol position of the PSCCH in a time-frequency unit is represented by the index information of the time-domain symbol or the offset relative to the specific time-domain symbol
  • the frequency domain starting position of the PSCCH in a time-frequency unit is represented by index information of the frequency domain unit or an offset relative to a specific frequency domain unit, and/or the frequency domain of the PSCCH in a time-frequency unit
  • the resource length is indicated by frequency domain resource size indication information.
  • the time domain resource occupied by the PSSCH scheduled by the PSCCH is greater than the time domain resource occupied by the PSCCH.
  • the PSCCH and the PSSCH scheduled by the PSCCH occupy different time domain resources.
  • the one time-frequency unit includes one time slot or one subframe in the time domain.
  • the interaction and related characteristics and functions between the network device and the terminal device described by the network device correspond to the related characteristics and functions of the terminal device. That is, what message the network device sends to the terminal device, and the terminal device receives the corresponding message from the network device.
  • FIG. 10 shows a schematic block diagram of a terminal device 300 according to an embodiment of the present application.
  • the terminal device 300 includes:
  • the processing unit 310 is configured to determine the time-frequency resource of the physical side control channel PSCCH in the first time-frequency unit;
  • the transceiver unit 320 is configured to receive or send the PSCCH on the time-frequency resource.
  • the processing unit is specifically configured to: determine at least one of the following information in the first time-frequency unit of the PSCCH: the position of the starting time domain symbol, and the occupied Number of time domain symbols, end time domain symbol position, frequency domain start position, frequency domain resource length, and frequency domain end position
  • the processing unit is specifically configured to: according to a first parameter, determine a starting time domain symbol position of the PSCCH in the first time-frequency unit.
  • the first parameter includes the position K of the first time-domain symbol used to receive the PSCCH in a time-frequency unit, where K is an integer.
  • the processing unit is specifically configured to: determine the starting time domain symbol position of the PSCCH in the first time-frequency unit as the time domain symbol position corresponding to K;
  • the transceiver unit is specifically configured to start receiving or sending the PSCCH from the time-domain symbol corresponding to the time-domain symbol position K in the first time-frequency unit.
  • K is the maximum value in the starting time-domain symbol position corresponding to at least one terminal device in a time-frequency unit that can be used to transmit the PSCCH.
  • the first parameter includes a maximum value M of the number of time-domain symbols that need to be monitored in a time-frequency unit, where M is an integer.
  • the processing unit is specifically configured to: determine the starting time domain symbol position of the PSCCH in the first time-frequency unit as the time domain corresponding to (M+i) Symbol position, where i is an integer and i is determined according to the subcarrier interval; the transceiving unit is specifically used to: from the time domain symbol position in the first time-frequency unit is the time domain corresponding to (M+i) The symbol starts to receive or transmit the PSCCH.
  • the maximum value M is the maximum value in the number of time-domain symbols corresponding to at least one terminal device that needs to be intercepted in one time-frequency unit.
  • the first parameter is determined by protocol preconfiguration information or configuration of a network device.
  • the processing unit is specifically configured to determine the length of the frequency domain resource of the PSCCH in the first time-frequency unit according to the aggregation level used by the PSCCH.
  • At least one of the following information is determined by protocol preconfiguration information or configuration information of a network device: the starting time domain symbol position of the PSCCH in the first time-frequency unit, The number of time-domain symbols occupied by the PSCCH in the first time-frequency unit, the end time-domain symbol position of the PSCCH in the first time-frequency unit, and the frequency of the PSCCH in the first time-frequency unit The domain start position, the PSCCH frequency domain end position in the first time-frequency unit, and the PSCCH frequency domain resource length in the first time-frequency unit.
  • the position of the starting time-domain symbol of the PSCCH in the first time-frequency unit is represented by the index information of the time-domain symbol or the offset from the specific time-domain symbol
  • the frequency domain starting position of the PSCCH in the first time-frequency unit is represented by index information of the frequency domain unit or an offset from a specific frequency domain unit
  • the PSCCH is located in the The frequency domain resource length in the first time-frequency unit is indicated by frequency domain resource size indication information.
  • the time domain resource occupied by the PSSCH scheduled by the PSCCH is greater than the time domain resource occupied by the PSCCH.
  • the PSCCH and the PSSCH scheduled by the PSCCH occupy different time domain resources.
  • the one time-frequency unit includes one time slot or one subframe in the time domain.
  • terminal device 300 may correspond to the terminal device in the method embodiment of the present application, and the above and other operations and/or functions of each unit in the terminal device 300 are respectively used to implement the terminal in the method of FIG. 8 The corresponding process of the device will not be repeated here for brevity.
  • FIG. 11 shows a schematic block diagram of a network device 400 according to an embodiment of the present application.
  • the network device 400 includes:
  • the processing unit 410 is configured to determine the first parameter
  • the transceiver unit 420 is configured to send the first parameter to the terminal device, where the first parameter is used by the terminal device to determine the starting position of the time domain symbol of the physical side control channel PSCCH in a time-frequency unit.
  • the processing unit in the embodiment of the present application is specifically configured to: acquire the number of time-domain symbols that need to be configured for at least one terminal device in a time-frequency unit;
  • the maximum value K in the number of time-domain symbols to be listened to is determined as the first parameter, and K is an integer.
  • the processing unit is specifically configured to: obtain a starting time domain symbol position that needs to be transmitted for the PSCCH configured for at least one terminal device in a time-frequency unit; and convert the at least one terminal device
  • the maximum value M in the starting time domain symbol position that can be used to transmit the PSCCH is determined as the first parameter, and M is an integer.
  • the transceiving unit is further configured to send at least one of the following information to the terminal device: PSCCH start time domain symbol position in a time-frequency unit, PSCCH in The number of time-domain symbols occupied by one time-frequency unit, the end time-domain symbol position of the PSCCH in a time-frequency unit, the start position of the frequency domain of the PSCCH in a time-frequency unit, and the PSCCH at a time The end position of the frequency domain in the frequency unit and the length of the frequency domain resource of the PSCCH in a time-frequency unit.
  • the starting time-domain symbol position of the PSCCH in a time-frequency unit is represented by the index information of the time-domain symbol or the offset relative to the specific time-domain symbol
  • the frequency domain starting position of the PSCCH in a time-frequency unit is represented by index information of the frequency domain unit or an offset relative to a specific frequency domain unit, and/or the frequency domain of the PSCCH in a time-frequency unit
  • the resource length is indicated by frequency domain resource size indication information.
  • the time domain resource occupied by the PSSCH scheduled by the PSCCH is greater than the time domain resource occupied by the PSCCH.
  • the PSCCH and the PSSCH scheduled by the PSCCH occupy different time domain resources.
  • the one time-frequency unit includes one time slot or one subframe in the time domain.
  • the network device 400 may correspond to the network device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 400 are respectively for realizing the network in the method of FIG. 9 The corresponding process of the device will not be repeated here for brevity.
  • an embodiment of the present application further provides a terminal device 500, which may be the terminal device 300 in FIG. 10, which can be used to execute the content of the terminal device corresponding to the method 100 in FIG. .
  • the terminal device 500 shown in FIG. 12 includes a processor 510, and the processor 510 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the terminal device 500 may further include a memory 520.
  • the processor 510 can call and run a computer program from the memory 520 to implement the method in the embodiments of the present application.
  • the memory 520 may be a separate device independent of the processor 510, or may be integrated in the processor 510.
  • the terminal device 500 may further include a transceiver 530, and the processor 510 may control the transceiver 530 to communicate with other devices, specifically, may send information or data to other devices, or receive other Information or data sent by the device.
  • the transceiver 530 may include a transmitter and a receiver.
  • the transceiver 530 may further include antennas, and the number of antennas may be one or more.
  • the terminal device 500 may be the terminal device of the embodiment of the present application, and the terminal device 500 may implement the corresponding process implemented by the terminal device in each method of the embodiment of the present application.
  • the processing unit in the terminal device 300 may be implemented by the processor 510 in FIG. 12.
  • the transceiver unit in the terminal device 300 may be implemented by the transceiver 530 in FIG. 12.
  • an embodiment of the present application further provides a network device 600.
  • the network device 600 may be the network device 400 in FIG. 11, which can be used to execute the content of the network device corresponding to the method 200 in FIG. 9. .
  • the network device 600 shown in FIG. 13 includes a processor 610, and the processor 610 can call and run a computer program from the memory to implement the method in the embodiments of the present application.
  • the network device 600 may further include a memory 620.
  • the processor 610 can call and run a computer program from the memory 620 to implement the method in the embodiments of the present application.
  • the memory 620 may be a separate device independent of the processor 610, or may be integrated in the processor 610.
  • the network device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, may send information or data to other devices, or receive other Information or data sent by the device.
  • the transceiver 630 may include a transmitter and a receiver.
  • the transceiver 630 may further include antennas, and the number of antennas may be one or more.
  • the network device 600 may be the network device of the embodiment of the present application, and the network device 600 may implement the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the network device 600 may implement the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • no further description is provided here.
  • the processing unit in the network device 400 may be implemented by the processor 610 in FIG. 13.
  • the transceiver unit in the network device 400 may be implemented by the transceiver 630 in FIG. 13.
  • FIG. 14 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • the chip 700 shown in FIG. 14 includes a processor 710, and the processor 710 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
  • the chip 700 may further include a memory 720.
  • the processor 710 can call and run a computer program from the memory 720 to implement the method in the embodiments of the present application.
  • the memory 720 may be a separate device independent of the processor 710, or may be integrated in the processor 710.
  • the chip 700 may further include an input interface 730.
  • the processor 710 can control the input interface 730 to communicate with other devices or chips. Specifically, it can obtain information or data sent by other devices or chips.
  • the chip 700 may further include an output interface 740.
  • the processor 710 can control the output interface 740 to communicate with other devices or chips. Specifically, it can output information or data to other devices or chips.
  • the chip can be applied to the terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the terminal device in each method of the embodiment of the present application.
  • the chip can implement the corresponding process implemented by the terminal device in each method of the embodiment of the present application.
  • the chip may be applied to the network device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • the chip may be applied to the network device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the network device in each method of the embodiment of the present application.
  • chips mentioned in the embodiments of the present application may also be referred to as system-level chips, system chips, chip systems, or system-on-chip chips.
  • the communication system 800 includes a network device 810 and a terminal device 820.
  • the network device 810 can be used to implement the corresponding function implemented by the network device in the above method
  • the terminal device 820 can be used to implement the corresponding function implemented by the terminal device in the above method.
  • the processor in the embodiment of the present application may be an integrated circuit chip, which has signal processing capabilities.
  • the steps of the foregoing method embodiments may be completed by instructions in the form of hardware integrated logic circuits or software in the processor.
  • the aforementioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an existing programmable gate array (Field Programmable Gate Array, FPGA), or other available Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application may be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware decoding processor, or may be executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a mature storage medium in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, and a register.
  • the storage medium is located in the memory, and the processor reads the information in the memory and combines the steps of the above method with its hardware.
  • 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 can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically Erase Programmable Read Only Memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • Synchlink DRAM SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data) SDRAM (DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is to say, the memories in the embodiments of the present application are intended to include but are not limited to these and any other suitable types of memories.
  • Embodiments of the present application also provide a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium may be applied to the network device in the embodiments of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiments of the present application.
  • the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiments of the present application.
  • the computer-readable storage medium can be applied to the terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, for simplicity And will not be repeated here.
  • An embodiment of the present application also provides a computer program product, including computer program instructions.
  • the computer program product may be applied to the network device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. Repeat again.
  • the computer program product can be applied to the terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method of the embodiment of the present application. I will not repeat them here.
  • An embodiment of the present application also provides a computer program.
  • the computer program can be applied to the network device in the embodiment of the present application.
  • the computer program runs on the computer, the computer is allowed to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. And will not be repeated here.
  • the computer program can be applied to the terminal device in the embodiments of the present application.
  • the computer program runs on the computer, the computer is allowed to execute the corresponding process implemented by the terminal device in each method of the embodiments of the present application. And will not be repeated here.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical, or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product
  • the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, Read-Only Memory (ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

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Abstract

本申请实施例公开了一种侧行通信的方法、终端设备和网络设备。该方法包括：终端设备确定物理侧行控制信道PSCCH在第一时频单元中的时频资源；所述终端设备在所述时频资源上，接收或发送所述PSCCH。本申请实施例的方法、终端设备和网络设备，有利于降低接收端终端设备检测PSCCH的复杂度。

Description

侧行通信的方法、终端设备和网络设备 技术领域
本申请实施例涉及通信领域，具体涉及一种侧行通信的方法、终端设备和网络设备。
背景技术
在新无线(New Radio，NR)-车辆到其他设备(Vehicle to Everything，V2X)中，为了降低时延，物理侧行控制信道(Physical Sidelink Control Channel，PSCCH)和其对应的PSSCH采用了与长期演进(Long Term Evaluation，LTE)-V2X中不同的复用结构，在NR-V2X采用的复用结构中，如何传输PSCCH是需要解决的问题。
发明内容
本申请实施例提供一种侧行通信的方法、终端设备和网络设备，有利于降低终端设备盲检PSCCH的复杂度。
第一方面，提供了一种侧行通信的方法，该方法包括：终端设备确定物理侧行控制信道PSCCH在第一时频单元中的时频资源；所述终端设备在所述时频资源上，接收或发送所述PSCCH。
第二方面，提供了一种侧行通信的方法，该方法包括：网络设备确定第一参数；所述网络设备向终端设备发送所述第一参数，所述第一参数用于所述终端设备确定物理侧行控制信道PSCCH在一个时频单元中的时域符号起始位置。
第三方面，提供了一种终端设备，用于执行上述第一方面或其各实现方式中的方法。
具体地，该终端设备包括用于执行上述第一方面或其各实现方式中的方法的功能模块。
第四方面，提供了一种网络设备，用于执行上述第二方面或其各实现方式中的方法。
具体地，该网络设备包括用于执行上述第二方面或其各实现方式中的方法的功能模块。
第五方面，提供了一种终端设备，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述第一方面或其各实现方式中的方法。
第六方面，提供了一种网络设备，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述第二方面或其各实现方式中的方法。
第七方面，提供了一种芯片，用于实现上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
具体地，该芯片包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有该芯片的设备执行如上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第八方面，提供了一种计算机可读存储介质，用于存储计算机程序，该计算机程序使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第九方面，提供了一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第十方面，提供了一种计算机程序，当其在计算机上运行时，使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
通过上述技术方案，终端设备可以先确定PSCCH在第一时频单元中的时频资源，并在确定的时频资源上检测PSCCH，使得作为接收端的终端设备能够明确知道PSCCH在 一个时频单元中的具体位置，从而降低了终端设备盲检PSCCH的复杂度。
附图说明
图1是本申请实施例提供的一种侧行通信系统的示意性图。
图2是本申请实施例提供的一种侧行通信系统的示意性图。
图3是本申请实施例提供的侧行链路数据的传输方式的示意性框图。
图4是LTE-V2X中的控制信息和数据的资源池配置的示意性框图。
图5是NR-V2X中一种资源分配方式的示意性图。
图6是NR-V2X中的控制信息和数据传输所采用的两种结构的示意性图。
图7是NR-V2X中结构2包括的各种子结构的示意性图。
图8是本申请实施例提供的侧行通信的方法的一种示意性框图。
图9是本申请实施例提供的侧行通信的方法的另一种示意性框图。
图10是本申请实施例提供的终端设备的一种示意性框图。
图11是本申请实施例提供的网络设备的一种示意性框图。
图12是本申请实施例提供的终端设备的另一种示意性框图。
图13是本申请实施例提供的网络设备的另一种示意性框图。
图14是本申请实施例提供的一种芯片的示意性框图。
图15是本申请实施例提供的一种通信系统的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
应理解，本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进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、新无线(New Radio，NR)或未来的5G系统等。
特别地，本申请实施例的技术方案可以应用于各种基于非正交多址接入技术的通信系统，例如稀疏码多址接入(Sparse Code Multiple Access，SCMA)系统、低密度签名(Low Density Signature，LDS)系统等，当然SCMA系统和LDS系统在通信领域也可以被称为其他名称；进一步地，本申请实施例的技术方案可以应用于采用非正交多址接入技术的多载波传输系统，例如采用非正交多址接入技术正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)、滤波器组多载波(Filter Bank Multi-Carrier，FBMC)、通用频分复用(Generalized Frequency Division Multiplexing，GFDM)、滤波正交频分复用(Filtered-OFDM，F-OFDM)系统等。
本申请实施例中的终端设备可以指用户设备(User Equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)、具有无线通信功能的手持设备、 计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(Public Land Mobile Network，PLMN)中的终端设备等，本申请实施例并不限定。
本申请实施例中的网络设备可以是用于与终端设备通信的设备，该网络设备可以是GSM或CDMA中的基站(Base Transceiver Station，BTS)，也可以是WCDMA系统中的基站(NodeB，NB)，还可以是LTE系统中的演进型基站(Evolutional NodeB，eNB或eNodeB)，还可以是云无线接入网络(Cloud Radio Access Network，CRAN)场景下的无线控制器，或者该网络设备可以为中继站、接入点、车载设备、可穿戴设备以及未来5G网络中的网络设备或者未来演进的PLMN网络中的网络设备等，本申请实施例并不限定。
图1和图2是本申请实施例的一个应用场景的示意图。图1示例性地示出了一个网络设备和两个终端设备，可选地，该无线通信系统可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备，本申请实施例对此不做限定。此外，该无线通信系统还可以包括移动管理实体(Mobile Management Entity，MME)、服务网关(Serving Gateway，S-GW)、分组数据网络网关(Packet Data Network Gateway，P-GW)等其他网络实体，但本申请实施例不限于此。
具体地，终端设备20和终端设备30可以以设备到设备(Device to Device，D2D)通信模式进行通信，在进行D2D通信时，终端设备20和终端设备30通过D2D链路即侧行链路(Sidelink，SL)直接进行通信。例如图1或者图2所示，终端设备20和终端设备30通过侧行链路直接进行通信。在图1中，终端设备20和终端设备30之间通过侧行链路通信，其传输资源是由网络设备分配的；在图2中，终端设备20和终端设备30之间通过侧行链路通信，其传输资源是由终端设备自主选取的，不需要网络设备分配传输资源。
D2D通信模式可以应用于车对车(Vehicle to Vehicle，V2V)通信或车辆到其他设备(Vehicle to Everything，V2X)通信。在V2X通信中，X可以泛指任何具有无线接收和发送能力的设备，例如但不限于慢速移动的无线装置，快速移动的车载设备，或是具有无线发射接收能力的网络控制节点等。应理解，本申请实施例主要应用于V2X通信的场景，但也可以应用于任意其它D2D通信场景，本申请实施例对此不做任何限定。
在3GPP协议的版本Release-14中对LTE-V2X进行了标准化，定义了两种传输模式，即传输模式3(mode 3)和传输模式4(mode 4)。使用传输模式3的终端设备的传输资源是由基站分配的，终端设备根据基站分配的资源在侧行链路上进行数据的发送；基站可以为终端设备分配单次传输的资源，也可以为终端设备分配半静态传输的资源。使用传输模式4的终端设备如果具备侦听能力，采用侦听(sensing)和预留(reservation)的方式传输数据，如果终端设备不具备侦听能力，则在资源池中随机选取传输资源。具备侦听能力的终端设备在资源池中通过侦听的方式获取可用的资源集合，终端设备从该集合中随机选取一个资源进行数据传输。由于车联网系统中的业务具有周期性特征，因此终端设备通常采用半静态传输的方式，即终端设备选取一个传输资源后，就会在多个传输周期中持续的使用该资源，从而降低资源重选以及资源冲突的概率。终端设备会在本次传输的控制信息中携带预留下次传输资源的信息，从而使得其他终端设备可以通过检测该终端设备的控制信息判断这块资源是否被该终端设备预留和使用，达到降低资源冲突的目的。
在LTE-V2X中，侧行链路传输的数据采用如图3所示的侧行控制信息(Sidelink Control Information，SCI)+数据的传输方式，其中SCI中携带的是用于解调数据所需的信息，如调制与编码策略(Modulation and Coding Scheme，MCS)、时频资源分配信息、优先级信息等，接收端的终端设备通过检测SCI获得数据的时频资源位置，并且在相应 的时频资源上对数据进行检测。SCI承载在PSCCH上，数据承载在PSSCH上，通过协议预配置或者网络配置PSCCH的资源池以及PSSCH的资源池，发送端的终端设备在相应的资源池中分别发送PSCCH和PSSCH，接收端的终端设备首先在PSCCH的资源池中盲检测PSCCH，根据PSCCH携带的SCI中的指示信息，到PSSCH资源池中相应的时频资源上检测该SCI对应的PSSCH。
在LTE-V2X中，数据和其对应的控制信息位于相同的子帧，并且是FDM的，具体的，控制信息和数据的资源池配置有两种方式：频域相邻(adjacent)和非相邻(non-adjacent)方式，具体的关系如图4所示。
其中，相邻方式是指控制信息和其对应的数据在频域上是相邻的，整个系统带宽以子带为粒度，每个子带包含多个连续的物理资源块(Physical Resource Block，PRB)，每个子带中的第一、第二个PRB为可用的控制资源(每个控制信息占据频域两个相邻的PRB)，其余的PRB为可用的数据资源，数据资源和控制资源的是一一对应的，并且数据资源的起始位置是由其对应的控制资源决定的。数据资源可以占用一个子带(如图4中的UE1)，也可以跨过多个子带(如图4中的UE2)，当数据占用多个子带时，数据在多个子带内是频域连续的，可以占用其他子带内的控制资源，并且数据对应的控制信息位于第一个子带中的控制资源中，如图4中UE2的数据占据了两个相邻的子带，因此其对应的控制信息在第一个子带的控制资源内。
在NR-V2X中，需要支持自动驾驶，因此对车辆之间数据交互提出了更高的要求，如更高的吞吐量、更低的时延、更高的可靠性、更大的覆盖范围、更灵活的资源分配等。
在NR-V2X系统中，引入了多种传输模式，例如，模式1和模式2，其中，模式1是网络为终端分配传输资源(类似与LTE-V2X中的mode 3)，模式2是终端选取传输资源，在模式2下又包括但不限于以下几种模式：
mode 2a：终端自主选取传输资源(类似于LTE-V2X中的mode 4)；例如，终端在一个预配置或网络配置的资源池中自主选取资源(可以通过随机的方式选取资源，或者通过侦听的方式选取资源)。
mode 2b：终端辅助其他终端选取资源；例如，第一终端向第二终端发送辅助信息，该辅助信息可以包括但不限于：可用的时频资源信息，可用的传输资源集合信息，信道测量信息和信道质量信息(如信道状态信息(Channel State Information，CSI)、信道质量指示(Channel Quality Indicator，CQI)、预编码矩阵指示(Precoding Matrix Indicator，PMI)、秩指示(rank indication，RI)、参考信号接收功率(Reference Signal Receiving Power，RSRP)、参考信号接收质量(Reference Signal Receiving Quality，RSRQ)、接收信号的强度指示(Received Signal Strength Indicator，RSSI)、路损信息等)。
mode 2c：终端在为其配置的传输资源中选取资源；例如，网络为每个终端配置多个传输资源，当终端有侧行数据传输时，从网络配置的多个传输资源中选择一个传输资源进行数据传输。
mode 2d：第一终端为第二终端分配传输资源；例如，第一终端为组通信的组头，第二终端是该组的组成员，第一终端直接为第二终端分配侧行链路传输的时频资源。如图5所示，UE1、UE2和UE3构成一个通信组，UE1是该组的组头，具有资源管理、分配、控制等功能，UE2和UE3是组成员，UE1可以为UE2和UE3分配侧行链路传输资源，UE2和UE3在UE1分配的资源上进行侧行链路传输。
在NR-V2X中，为了降低时延，侧行链路控制信息SCI和其对应的数据采用了新的复用结构，如图6和图7所示。其中，C表示控制信息，D表示数据，即在一个子帧或者时隙中，控制信息占用部分时域符号，终端设备可以通过检测控制信息获取解调数据的指示信息，从而可以检测数据。控制信息只占用部分时域符号可以实现快速的解调控制信息，从而达到降低时延的目的。
如图6所示，NR-V2X采用的复用结构主要分为结构1和结构2，结构1是指控制信息可以在数据之前传输，控制信息和数据占用不同的时域资源，进一步的，控制信息和该控制信息调度的数据可以在相同时隙或不同时隙中传输；结构2是指控制信息的时域资源可以与数据的时域资源有部分重合。
关于结构2又可以包括如图7所示的4种子结构：子结构2-1、子结构2-2、子结构2-3和子结构2-4。
由图7所知，对于结构2，PSCCH的时域资源可以占据一个子帧或一个时隙中的任意时域符号，PSCCH的频域资源也可以占据系统带宽或一个带宽部分(Bandwith Part，BWP)的部分子带，如何确定PSCCH占据的时频资源是要解决的问题。
图8为本申请实施例提供的一种侧行通信的方法100的示意性框图。该方法可以由图1或图2中作为接收端的某个终端设备执行，如图8所示，该方法100包括以下部分或全部内容：
S110，终端设备确定物理侧行控制信道PSCCH在第一时频单元中的时频资源。
S120，所述终端设备在所述时频资源上，接收或发送所述PSCCH。
需要说明的是，第一时频单元在时域上可以包括一个时间单元，该时间单元可以是一个子帧或一个时隙，也可以是由特定时域符号个数组成的时间单元。第一时频单元在频域上可以包括一个频域单元，该频域单元可以是系统带宽，一个带宽部分(Bandwidth Part)或者是由特定子带个数组成的频域单元。
具体地，侧行数据的传输是需要由SCI调度的，即SCI中携带用于解调数据所需的信息，而SCI是承载在PSCCH上的，在进行侧行通信时，终端设备是以一个时频单元为基本进行传输的，当需要传输PSCCH时，作为发送端的终端设备需要先确定在当前时频单元中用于传输PSCCH的时频资源，该时频资源包括时域资源和/或频域资源，然后发送端的终端设备可以在确定的时频资源上传输PSCCH。而作为接收端的终端设备也需要先确定在当前时频单元中的哪些时频资源上去接收或检测PSCCH，之后在相应的时频资源上接收或检测PSCCH。
应理解，对于发送端的终端设备来讲，PSCCH的时频资源即PSCCH的发送资源；对于接收端的终端设备来讲，PSCCH的时频资源即PSCCH的接收资源。
特别地，本申请实施例的方案适用于图6或图7中传输PSCCH和PSSCH所采用的复用结构，对于结构1，所述PSCCH和所述PSCCH调度的PSSCH占据不同的时域资源，而对于结构2，所述PSCCH调度的PSSCH占据的时域资源大于所述PSCCH占据的时域资源。
可选地，确定PSCCH在一个时频单元中的时频资源可以包括确定PSCCH在一个时频单元中的时域资源和/或频域资源。
具体地，确定PSCCH在一个时频单元中的时域资源可以包括确定PSCCH在一个时频单元中的起始时域符号位置、结束时域符号位置和所占据的时域符号的个数中的至少一种。
可选地，PSCCH在一个时频单元中的起始时域符号位置、结束时域符号位置或者所占据的时域符号个数可以通过协议预配置信息(例如协议预先约定)、网络设备的配置信息(例如，网络设备通过广播消息、无线资源控制(Radio Resource Control)信令或控制信息等配置)确定，或者还可以由其他终端设备确定。例如，该其他终端设备可以是该终端设备所在通信组中的组头。
可选地，PSCCH在一个时频单元中的起始时域符号位置或结束时域符号位置可以通过时域符号的索引信息或者相对于特定时域符号的偏移量。例如，协议约定PSCCH在一个时频单元中的起始时域符号位置为第一个时域符号，那么协议预配置信息可以包括指示域，用来指示一个时频单元中的第一个时域符号的索引信息。再例如，网络设备为终 端设备配置PSCCH在一个时频单元中的结束时域符号位置为最后一个时域符号，那么配置信息可以包括指示域，用来指示一个时频单元中的最后一个时域符号的索引值。再例如，网络设备为终端设备配置PSCCH在一个时频单元中的起始时域符号位置相对于第四个时域符号的偏移量为2，那么终端设备即可获知PSCCH在一个时频单元中的起始时域符号位置为第六个时域符号。再例如，协议预先约定PSCCH在一个时频单元中的结束时域符号位置相对于第四个时域符号的偏移量为-2，那么终端设备即可获知PSCCH在一个时频单元中的结束时域符号位置为第二个时域符号。
可选地，PSCCH在一个时频单元中占据的时域符号个数可以通过A比特来指示。例如，如果PSCCH占据的最大的时域符号个数是4个，则可以用2比特来指示PSCCH在一个时频单元中占据的时域符号个数。
可选地，在本申请实施例中，终端设备还可以根据第一参数，确定PSCCH在一个时隙或子帧中的起始时域符号位置。该第一参数可以是由协议预配置信息、网络设备的配置信息或者其他终端设备的配置信息确定的。该第一参数可以与终端设备在一个时频单元中需要侦听或测量的时域符号个数有关。
通常，在一个时频单元中，终端设备需要先进行侦听或者测量，然后根据侦听或者测量的结果决定是否需要发送PSCCH和/或PSSCH，例如，终端设备在一个时频单元中需要侦听或测量的时域符号个数为P，终端设备可以根据该需要侦听或测量的时域符号个数P(也就是所述第一参数)，来确定PSCCH在一个时频单元中的起始时域符号位置。例如，例如起始符号位置是P+1，或者是P+2。
需要说明的是，侦听或测量通常是从一个时频单元中的第一个符号开始，终端设备在一个时频单元中需要侦听或测量的时域符号个数为P，也可以理解为，终端设备在一个时频单元中的前P个时域符号上需要侦听或测量。
在一个时频单元中，终端设备要发送PSCCH和/或PSSCH，会根据侦听或者测量的结果确定该时隙或者子帧是否可以用于发送PSCCH和/或PSSCH，不同的终端设备可能具有不同的侦听或者测量参数。例如，网络设备可以为不同的终端设备配置不同的侦听参数，该参数例如可以是终端设备测量的信号能量低于门限值的时域符号个数。终端设备根据网络配置信息初始化该参数，例如，该参数初始化值为Q，当终端设备测量的时域符号上的能量低于门限时，该参数减1，当终端设备测量的时域符号上的能量高于或等于门限时，该参数不变，继续测量下一个时域符号的能量，当该参数减到0时，终端设备就会在随后的时域符号上发送PSCCH和/或PSSCH。在一个时频单元中，不同的终端设备被配置的该参数可能是不同的，例如，对于第一终端设备来说，该参数可以是2，对于第二终端设备来说，该参数可以是3。当第一终端设备在一个时频单元中侦听或测量到有两个时域符号上的能量低于门限时，第一终端设备即可抢占下一个时域符号进行发送；当第二终端设备在一个时频单元中侦听或测量到有三个时域符号上的能量低于门限时，第二终端设备即可抢占下一个时域符号进行发送。该侦听参数先减到0的终端设备可以先抢占资源进行发送。
那么在一个时频单元中，如果有至少一个终端设备发送PSCCH和PSSCH，由于不同的终端设备可能需要侦听或者测量的时域符号个数是不同的，不同的终端设备确定的可用于发送PSCCH的起始时域符号也可能是不同的。可以根据协议预配置信息或者网络设备的配置信息，使得不同终端设备获得相同的第一参数。进而不同的终端设备根据相同的规则，可以确定出在一个时频单元的相同起始时域符号位置上开始发送或接收PSCCH。
可选地，该第一参数可以是在一个时频单元中用于接收PSCCH的第一个时域符号的位置K，K为整数。也就是说，对于所有发送端的终端设备来说，都只能从第一参数或者第一参数之后对应的时域符号上发送PSCCH；而对于所有接收端的终端设备来说，也 都只能从第一参数或者第一参数之后对应的时域符号上接收或者检测PSCCH。例如，终端设备可以直接将K对应的时域符号位置确定为PSCCH在一个时频单元中的起始时域符号位置，进而终端设备可以在一个时频单元中从K对应的时域符号开始发送或者接收PSCCH。具体地，若K为一个时频单元中的第三个时域符号，那么终端设备可以从一个时频单元中的第三个时域符号开始发送或接收PSCCH，或者，终端设备也可以从一个时频单元中的第四个、第五个时域符号等开始发送或接收PSCCH，只要终端设备不从K对应的时域符号之前的时域符号上开始发送或接收PSCCH即可。
可选地，K可以是在一个时频单元中对应于至少一个终端设备的可用于传输PSCCH的起始时域符号位置中的最大值。由于不同终端设备需要侦听或测量的时域符号个数不同，不同终端设备在一个时频单元中能够抢占的用于传输PSCCH的起始时域符号位置也就不同，就会增加接收端的终端设备检测PSCCH的复杂度，即终端设备需要在所有可能的时域符号上检测PSCCH。例如，终端设备1能够用于传输PSCCH的第一个时域符号位置为1，终端设备2能够用于传输PSCCH的第一个时域符号位置为2，终端设备3能够用于传输PSCCH的第一个时域符号位置为3，对于接收端的终端设备4来说，不确定是终端设备1、终端设备2和终端设备3中的哪一个发送的PSCCH，因此，需要分别从时域符号位置为1、2、3的时域符号上开始接收或检测。
如果可以将多个终端设备在一个时频单元中能够抢占的用于传输PSCCH的起始时域符号位置的最大值确定为K，那么对于该多个终端设备中作为发送端的终端设备可以从确定的时域符号位置上开始发送PSCCH，而作为接收端的终端设备就可以从确定的时域符号位置上开始检测PSCCH，而不再需要在一个时频单元中所有可能的时域符号上检测PSCCH。例如，在上述示例中，网络设备可以分别为终端设备1、终端设备2、终端设备3和终端设备4配置终端设备1、终端设备2和终端设备3中能够用于传输PSCCH的第一个时域符号位置的最大值3为发送或接收PSCCH的起始时域符号位置，那么无论是终端设备1、终端设备2还是终端设备3中的哪个为终端设备发送的PSCCH，作为接收端的终端设备4都可以从时域符号位置为3的时域符号上开始接收或检测PSCCH。
可选地，该第一参数可以是在一个时频单元中需要侦听或测量的时域符号个数的最大值M，M为整数。也就是说，对于所有发送端的终端设备来说，都只能从第一参数之后对应的时域符号上发送PSCCH；而对于所有接收端的终端设备来说，也都只能从第一参数之后对应的时域符号上接收或者检测PSCCH。例如，终端设备可以直接将所述PSCCH在一个时频单元中的起始时域符号位置确定为(M+i)对应的时域符号位置，进而终端设备就可以在一个时频单元中从时域符号位置为(M+i)对应的时域符号上开始接收或发送所述PSCCH。其中，i为正整数，i可以根据子载波间隔确定，不同子载波间隔对应不同的i值，i可以是协议预配置信息、网络设备的配置信息或者其他终端设备的配置信息确定的。可选的，时域符号(M+1)到(M+i-1)可以用于终端设备进行收发转换/或发收转换。可选的，至少需要一个时域符号用于终端设备进行收发转换/或发收转换。例如，对于子载波间隔120kHz，i可以是3，其中时域符号(M+1)、(M+2)可以用于终端设备进行收发转换；而对于子载波间隔30kHz，i可以是2，其中时域符号(M+1)可以是用于终端设备进行收发转换；对于子载波间隔15kHz，i可以为1，其中时域符号(M+1)可以是用于终端设备进行收发转换。
可选地，M可以为在一个时频单元中对应于至少一个终端设备的需要侦听的时域符号个数中的最大值。由于不同终端设备需要侦听或测量的时域符号个数不同，如果可以将多个终端设备在一个时频单元中需要侦听或测量的时域符号个数中的最大值确定为M，那么该多个终端设备中作为接收端的终端设备可以根据相同的规则，确定在一个时频单元中用于传输PSCCH的起始时域符号位置，进而就可以从确定的时域符号上开始检测PSCCH，而不再需要在一个时频单元中所有可能的时域符号上检测PSCCH。例如， 终端设备1需要侦听1个时域符号，终端设备2需要侦听2个时域符号，终端设备3需要侦听3个时域符号，如果网络设备将终端设备1、终端设备2和终端设备3中需要侦听的时域符号个数的最大值3(即参数M＝3)配置给各个终端设备在一个时频单元中需要侦听的时域符号个数的最大值，若协议约定或网络配置PSCCH在一个时频单元中的起始时域符号位置为(M+2)对应的时域符号位置，那么终端设备1、终端设备2和终端设备3中作为接收端的终端设备就可以从时域符号位置为5对应的时域符号上开始接收或检测其他终端设备发送的PSCCH。
可选地，确定PSCCH在一个时频单元中的时频资源还可以包括确定PSCCH在一个时频单元中的频域起始位置、频域结束位置和频域资源长度中的任意两种。
可选地，PSCCH在一个时频单元中的频域起始位置、频域结束位置或频域资源长度可以通过协议预配置信息(例如协议预先约定)、网络设备的配置信息(例如，网络设备通过广播消息、无线资源控制(Radio Resource Control)信令或控制信息等配置)确定，或者还可以由终端设备所在通信组中为组头的终端设备的配置信息确定。
可选地，所述PSCCH在一个单元中的频域起始位置或频域结束位置可以通过频域单元的索引信息或相对于特定频域单元的偏移量表示。例如，可以通过资源块或者子带或者资源块组的索引信息来表示PSCCH的频域起始位置或频域结束位置。再例如，可以通过相对于特定频域单元的偏移量来表示PSCCH的频域起始位置或频域结束位置。该特定频域单元可以是：带宽的起始位置、BWP的起始位置、资源池的起始位置、载波中心频域位置、同步信号最低频域位置、物理侧行广播信道(Physical sidelink broadcast channel，PSBCH)最低频域位置。
可选地，所述PSCCH在一个时频单元中的频域资源长度可以通过频域资源大小指示信息来表示。例如通过B比特来指示PSCCH占据的频域单元的个数，该频域单元可以是资源块、子带或者资源块组。
或者，终端设备还可以根据待传输的PSCCH的聚合等级，确定PSCCH在一个时频单元中的频域资源长度。例如，可以通过预配置信息或者网络配置信息配置不同的聚合等级与频域资源长度的映射关系，发送端的终端设备可以根据当前待传输的PSCCH的聚合等级以及该映射关系确定PSCCH在一个时频单元中的频域资源长度。如果接收端的终端设备已知待接收的的PSCCH的聚合等级，该终端设备根据聚合等级以及该映射关系确定PSCCH的频域资源长度；如果接收端的终端设备不知道待接收的PSCCH的聚合等级，该终端设备需要根据所有可能的聚合等级中的每一个聚合等级，并且根据该映射关系确定该每一个聚合等级对应的PSCCH的频域资源长度，并且根据该频域资源长度去检测PSCCH，若检测失败，会按照下一个聚合等级去重新确定PSCCH的频域资源长度并且重新检测PSCCH，若检测成功，则此时采用的聚合等级为该PSCCH所使用的聚合等级，该聚合等级对应的PSCCH的频域资源长度即为PSCCH的频域资源长度。
在上述所有实施例中，用于确定PSCCH的时域资源或者频域资源的各种信息及参数均可以是通过协议预定义(即预配置信息)或者网络配置信息确定的。例如，通过协议预定义或者网络配置PSCCH的资源池，在该资源池的配置信息中包括上述各种信息或参数。再例如，网络设备可以通过广播信息、RRC信令、下行控制信令等方式传输配置信息，该配置信息配置至少一个PSCCH资源池，在该资源池的配置信息中包括上述各种信息或者参数。或者，网络设备配置至少一个BWP，在BWP的配置信息中包括上述各种信息或者参数。
图9为本申请实施例提供的一种侧行通信的方法200的示意性框图。如图9所示，该方法300包括以下部分或全部内容：
S310，网络设备确定第一参数；
S320，所述网络设备向终端设备发送所述第一参数，所述第一参数用于所述终端设 备确定物理侧行控制信道PSCCH在一个时频单元中的时域符号起始位置。
可选地，在本申请实施例中，所述网络设备确定第一参数，包括：所述网络设备获取在一个时频单元中为至少一个终端设备配置的需要侦听的时域符号个数；所述网络设备将所述至少一个终端设备的需要侦听的时域符号个数中的最大值K确定为所述第一参数，K为整数。
可选地，在本申请实施例中，所述网络设备确定第一参数，包括：所述网络设备获取在一个时频单元中为至少一个终端设备配置的需要传输PSCCH的起始时域符号位置；所述网络设备将所述至少一个终端设备的可用于传输PSCCH的起始时域符号位置中的最大值M确定为所述第一参数，M为整数。
可选地，在本申请实施例中，所述方法还包括：所述网络设备向所述终端设备发送以下信息中的至少一种信息：PSCCH在一个时频单元中的起始时域符号位置、所述PSCCH在一个时频单元中的结束时域符号位置、PSCCH在一个时频单元中所占据的时域符号个数、PSCCH在一个时频单元中的频域起始位置、所述PSCCH在一个时频单元中的频域结束位置、和PSCCH在一个时频单元中的频域资源长度。
可选地，在本申请实施例中，所述PSCCH在一个时频单元中的起始时域符号位置通过时域符号的索引信息或相对于特定时域符号的偏移量表示，和/或所述PSCCH在一个时频单元中的频域起始位置通过频域单元的索引信息或相对于特定频域单元的偏移量表示，和/或所述PSCCH在一个时频单元中的频域资源长度通过频域资源大小指示信息表示。
可选地，在本申请实施例中，所述PSCCH调度的PSSCH占据的时域资源大于所述PSCCH占据的时域资源。
可选地，在本申请实施例中，所述PSCCH和所述PSCCH调度的PSSCH占据不同的时域资源。
可选地，在本申请实施例中，所述一个时频单元在时域上包括一个时隙或一个子帧。
应理解，网络设备描述的网络设备与终端设备之间的交互及相关特性、功能等与终端设备的相关特性、功能相应。也就是说，网络设备向终端设备发送什么消息，终端设备从网络设备接收相应的消息。
还应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
上文中详细描述了根据本申请实施例的侧行通信的方法，下面将结合图10至图13，描述根据本申请实施例的侧行通信的装置，方法实施例所描述的技术特征适用于以下装置实施例。
图10示出了本申请实施例的终端设备300的示意性框图。如图10所示，该终端设备300包括：
处理单元310，用于确定物理侧行控制信道PSCCH在第一时频单元中的时频资源；
收发单元320，用于在所述时频资源上，接收或发送所述PSCCH。
可选地，在本申请实施例中，所述处理单元具体用于：确定所述PSCCH在所述第一时频单元中以下信息中的至少一种信息：起始时域符号位置、所占据的时域符号的个数、结束时域符号位置、频域起始位置、频域资源长度和频域结束位置
可选地，在本申请实施例中，所述处理单元具体用于：根据第一参数，确定所述PSCCH在所述第一时频单元中的起始时域符号位置。
可选地，在本申请实施例中，所述第一参数包括在一个时频单元中用于接收PSCCH的第一个时域符号的位置K，K为整数。
可选地，在本申请实施例中，所述处理单元具体用于：将所述PSCCH在所述第一时 频单元中的起始时域符号位置确定为K对应的时域符号位置；所述收发单元具体用于：从所述第一时频单元中时域符号位置为K对应的时域符号上开始接收或发送所述PSCCH。
可选地，在本申请实施例中，K为在一个时频单元中对应于至少一个终端设备的可用于传输PSCCH的起始时域符号位置中的最大值。
可选地，在本申请实施例中，所述第一参数包括在一个时频单元中需要侦听的时域符号个数的最大值M，M为整数。
可选地，在本申请实施例中，所述处理单元具体用于：将所述PSCCH在所述第一时频单元中的起始时域符号位置确定为(M+i)对应的时域符号位置，其中，i为整数，且i是根据子载波间隔确定的；所述收发单元具体用于：从所述第一时频单元中时域符号位置为(M+i)对应的时域符号上开始接收或发送所述PSCCH。
可选地，在本申请实施例中，所述最大值M为在一个时频单元中对应于至少一个终端设备的需要侦听的时域符号个数中的最大值。
可选地，在本申请实施例中，所述第一参数通过协议预配置信息或网络设备的配置确定。
可选地，在本申请实施例中，所述处理单元具体用于：根据所述PSCCH所使用的聚合等级，确定所述PSCCH在所述第一时频单元中的频域资源长度。
可选地，在本申请实施例中，以下信息中的至少一种信息通过协议预配置信息或网络设备的配置信息确定：PSCCH在所述第一时频单元中的起始时域符号位置、PSCCH在所述第一时频单元中占据的时域符号的个数、所述PSCCH在所述第一时频单元中的结束时域符号位置、PSCCH在所述第一时频单元中的频域起始位置、所述PSCCH在所述第一时频单元中的频域结束位置、和PSCCH在所述第一时频单元中的频域资源长度。
可选地，在本申请实施例中，所述PSCCH在所述第一时频单元中的起始时域符号位置通过时域符号的索引信息或相对于特定时域符号的偏移量表示，和/或所述PSCCH在所述第一时频单元中的频域起始位置通过频域单元的索引信息或相对于特定频域单元的偏移量表示，和/或所述PSCCH在所述第一时频单元中的频域资源长度通过频域资源大小指示信息表示。
可选地，在本申请实施例中，所述PSCCH调度的PSSCH占据的时域资源大于所述PSCCH占据的时域资源。
可选地，在本申请实施例中，所述PSCCH和所述PSCCH调度的PSSCH占据不同的时域资源。
可选地，在本申请实施例中，所述一个时频单元在时域上包括一个时隙或一个子帧。
应理解，根据本申请实施例的终端设备300可对应于本申请方法实施例中的终端设备，并且终端设备300中的各个单元的上述和其它操作和/或功能分别为了实现图8方法中终端设备的相应流程，为了简洁，在此不再赘述。
图11示出了本申请实施例的网络设备400的示意性框图。如图11所示，该网络设备400包括：
处理单元410，用于确定第一参数；
收发单元420，用于向终端设备发送所述第一参数，所述第一参数用于所述终端设备确定物理侧行控制信道PSCCH在一个时频单元中的时域符号起始位置。
可选地，在本申请实施例中所述处理单元具体用于：获取在一个时频单元中为至少一个终端设备配置的需要侦听的时域符号个数；将所述至少一个终端设备的需要侦听的时域符号个数中的最大值K确定为所述第一参数，K为整数。
可选地，在本申请实施例中所述处理单元具体用于：获取在一个时频单元中为至少一个终端设备配置的需要传输PSCCH的起始时域符号位置；将所述至少一个终端设备的 可用于传输PSCCH的起始时域符号位置中的最大值M确定为所述第一参数，M为整数。
可选地，在本申请实施例中所述收发单元还用于：向所述终端设备发送以下信息中的至少一种信息：PSCCH在一个时频单元中的起始时域符号位置、PSCCH在一个时频单元中所占据的时域符号个数、所述PSCCH在一个时频单元中的结束时域符号位置、PSCCH在一个时频单元中的频域起始位置、所述PSCCH在一个时频单元中的频域结束位置、和PSCCH在一个时频单元中的频域资源长度。
可选地，在本申请实施例中，所述PSCCH在一个时频单元中的起始时域符号位置通过时域符号的索引信息或相对于特定时域符号的偏移量表示，和/或所述PSCCH在一个时频单元中的频域起始位置通过频域单元的索引信息或相对于特定频域单元的偏移量表示，和/或所述PSCCH在一个时频单元中的频域资源长度通过频域资源大小指示信息表示。
可选地，在本申请实施例中，所述PSCCH调度的PSSCH占据的时域资源大于所述PSCCH占据的时域资源。
可选地，在本申请实施例中，所述PSCCH和所述PSCCH调度的PSSCH占据不同的时域资源。
可选地，在本申请实施例中，所述一个时频单元在时域上包括一个时隙或一个子帧。
应理解，根据本申请实施例的网络设备400可对应于本申请方法实施例中的网络设备，并且网络设备400中的各个单元的上述和其它操作和/或功能分别为了实现图9方法中网络设备的相应流程，为了简洁，在此不再赘述。
如图12所示，本申请实施例还提供了一种终端设备500，该终端设备500可以是图10中的终端设备300，其能够用于执行与图8中方法100对应的终端设备的内容。图12所示的终端设备500包括处理器510，处理器510可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图12所示，终端设备500还可以包括存储器520。其中，处理器510可以从存储器520中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器520可以是独立于处理器510的一个单独的器件，也可以集成在处理器510中。
可选地，如图12所示，终端设备500还可以包括收发器530，处理器510可以控制该收发器530与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
其中，收发器530可以包括发射机和接收机。收发器530还可以进一步包括天线，天线的数量可以为一个或多个。
可选地，该终端设备500可为本申请实施例的终端设备，并且该终端设备500可以实现本申请实施例的各个方法中由终端设备实现的相应流程，为了简洁，在此不再赘述。
一个具体的实施方式中，终端设备300中的处理单元可以由图12中的处理器510实现。终端设备300中的收发单元可以由图12中的收发器530实现。
如图13所示，本申请实施例还提供了一种网络设备600，该网络设备600可以是图11中的网络设备400，其能够用于执行与图9中方法200对应的网络设备的内容。图13所示的网络设备600包括处理器610，处理器610可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图13所示，网络设备600还可以包括存储器620。其中，处理器610可以从存储器620中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器620可以是独立于处理器610的一个单独的器件，也可以集成在处理器610中。
可选地，如图13所示，网络设备600还可以包括收发器630，处理器610可以控制 该收发器630与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
其中，收发器630可以包括发射机和接收机。收发器630还可以进一步包括天线，天线的数量可以为一个或多个。
可选地，该网络设备600可为本申请实施例的网络设备，并且该网络设备600可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
一个具体的实施方式中，网络设备400中的处理单元可以由图13中的处理器610实现。网络设备400中的收发单元可以由图13中的收发器630实现。
图14是本申请实施例的芯片的示意性结构图。图14所示的芯片700包括处理器710，处理器710可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，如图14所示，芯片700还可以包括存储器720。其中，处理器710可以从存储器720中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器720可以是独立于处理器710的一个单独的器件，也可以集成在处理器710中。
可选地，该芯片700还可以包括输入接口730。其中，处理器710可以控制该输入接口730与其他设备或芯片进行通信，具体地，可以获取其他设备或芯片发送的信息或数据。
可选地，该芯片700还可以包括输出接口740。其中，处理器710可以控制该输出接口740与其他设备或芯片进行通信，具体地，可以向其他设备或芯片输出信息或数据。
可选地，该芯片可应用于本申请实施例中的终端设备，并且该芯片可以实现本申请实施例的各个方法中由终端设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该芯片可应用于本申请实施例中的网络设备，并且该芯片可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
图15是本申请实施例提供的一种通信系统800的示意性框图。如图15所示，该通信系统800包括网络设备810和终端设备820。
其中，该网络设备810可以用于实现上述方法中由网络设备实现的相应的功能，以及该终端设备820可以用于实现上述方法中由终端设备实现的相应的功能为了简洁，在此不再赘述。
应理解，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种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。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，本申请实施例的处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(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。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其 硬件完成上述方法的步骤。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。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RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，上述存储器为示例性但不是限制性说明，例如，本申请实施例中的存储器还可以是静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch link DRAM，SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)等等。也就是说，本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供了一种计算机可读存储介质，用于存储计算机程序。
可选的，该计算机可读存储介质可应用于本申请实施例中的网络设备，并且该计算机程序使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机可读存储介质可应用于本申请实施例中的终端设备，并且该计算机程序使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序产品，包括计算机程序指令。
可选的，该计算机程序产品可应用于本申请实施例中的网络设备，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机程序产品可应用于本申请实施例中的终端设备，并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程，为了简洁，在此不再赘述。
本申请实施例还提供了一种计算机程序。
可选的，该计算机程序可应用于本申请实施例中的网络设备，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该计算机程序可应用于本申请实施例中的终端设备，当该计算机程序在计算机上运行时，使得计算机执行本申请实施例的各个方法中由终端设备实现的相应流程，为了简洁，在此不再赘述。
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所述以权利要求的保护范围为准。

Claims (58)

  1. 一种侧行通信的方法，其特征在于，包括：
    终端设备确定物理侧行控制信道PSCCH在第一时频单元中的时频资源；
    所述终端设备在所述时频资源上，接收或发送所述PSCCH。
  2. 根据权利要求1所述的方法，其特征在于，所述终端设备确定物理侧行控制信道PSCCH在第一时频单元中的时频资源，包括：
    所述终端设备确定所述PSCCH在所述第一时频单元中以下信息中的至少一种信息：起始时域符号位置、所占据的时域符号的个数、结束时域符号位置、频域起始位置、频域资源长度和频域结束位置。
  3. 根据权利要求2所述的方法，其特征在于，所述终端设备确定所述PSCCH在所述第一时频单元中的起始时域符号位置，包括：
    所述终端设备根据第一参数，确定所述PSCCH在所述第一时频单元中的起始时域符号位置。
  4. 根据权利要求3所述的方法，其特征在于，所述第一参数包括在一个时频单元中用于接收PSCCH的第一个时域符号的位置K，K为整数。
  5. 根据权利要求4所述的方法，其特征在于，所述终端设备根据第一参数，确定所述PSCCH在所述第一时频单元中的起始时域符号位置，包括：
    所述终端设备将所述PSCCH在所述第一时频单元中的起始时域符号位置确定为K对应的时域符号位置；
    所述终端设备在所述时频资源上，接收或发送所述PSCCH，包括：
    所述终端设备从所述第一时频单元中时域符号位置为K对应的时域符号上开始接收或发送所述PSCCH。
  6. 根据权利要求4或5所述的方法，其特征在于，K为在一个时频单元中对应于至少一个终端设备的可用于传输PSCCH的起始时域符号位置中的最大值。
  7. 根据权利要求3所述的方法，其特征在于，所述第一参数包括在一个时频单元中需要侦听或测量的时域符号个数的最大值M，M为整数。
  8. 根据权利要求7所述的方法，其特征在于，所述终端设备根据第一参数，确定所述PSCCH在所述第一时频单元中的起始时域符号位置，包括：
    所述终端设备将所述PSCCH在所述第一时频单元中的起始时域符号位置确定为(M+i)对应的时域符号位置，其中，i为正整数，且i是与子载波间隔有关的参数；
    所述终端设备在所述时频资源上，接收或发送所述PSCCH，包括：
    所述终端设备从所述第一时频单元中时域符号位置为(M+i)对应的时域符号上开始接收或发送所述PSCCH。
  9. 根据权利要求7或8所述的方法，其特征在于，M为在一个时频单元中对应于至少一个终端设备的需要侦听或测量的时域符号个数中的最大值。
  10. 根据权利要求3至9中任一项所述的方法，其特征在于，所述第一参数通过协议预配置信息或网络设备的配置信息确定。
  11. 根据权利要求2至10中任一项所述的方法，其特征在于，所述终端设备确定所述PSCCH在所述第一时频单元中的频域资源长度，包括：
    所述终端设备根据所述PSCCH所使用的聚合等级，确定所述PSCCH在所述第一时频单元中的频域资源长度。
  12. 根据权利要求1至11中任一项所述的方法，其特征在于，所述终端设备确定物理侧行控制信道PSCCH在第一时频单元中的时频资源，包括：
    根据协议预配置信息或网络设备的配置信息，确定以下信息中的至少一种信息：所 述PSCCH在所述第一时频单元中的起始时域符号位置、所述PSCCH在所述第一时频单元中占据的时域符号的个数、所述PSCCH在所述第一时频单元中的结束时域符号位置、所述PSCCH在所述第一时频单元中的频域起始位置、所述PSCCH在所述第一时频单元中的频域结束位置、和所述PSCCH在所述第一时频单元中的频域资源长度。
  13. 根据权利要求12所述的方法，其特征在于，所述PSCCH在所述第一时频单元中的起始时域符号位置通过时域符号的索引信息或相对于特定时域符号的偏移量表示，和/或所述PSCCH在所述第一时频单元中的频域起始位置通过频域单元的索引信息或相对于特定频域单元的偏移量表示，和/或所述PSCCH在所述第一时频单元中的频域资源长度通过频域资源大小指示信息表示。
  14. 根据权利要求1至13中任一项所述的方法，其特征在于，所述PSCCH调度的PSSCH占据的时域资源大于所述PSCCH占据的时域资源。
  15. 根据权利要求1至13中任一项所述的方法，其特征在于，所述PSCCH和所述PSCCH调度的PSSCH占据不同的时域资源。
  16. 根据权利要求1至15中任一项所述的方法，其特征在于，所述第一时频单元在时域上包括一个时隙或一个子帧。
  17. 一种侧行通信的方法，其特征在于，包括：
    网络设备确定第一参数；
    所述网络设备向终端设备发送所述第一参数，所述第一参数用于所述终端设备确定物理侧行控制信道PSCCH在一个时频单元中的时域符号起始位置。
  18. 根据权利要求17所述的方法，其特征在于，所述网络设备确定第一参数，包括：
    所述网络设备获取在一个时频单元中为至少一个终端设备配置的需要侦听的时域符号个数；
    所述网络设备将所述至少一个终端设备的需要侦听或测量的时域符号个数中的最大值K确定为所述第一参数，K为整数。
  19. 根据权利要求17所述的方法，其特征在于，所述网络设备确定第一参数，包括：
    所述网络设备获取在一个时频单元中为至少一个终端设备配置的可用于传输所述PSCCH的起始时域符号位置；
    所述网络设备将所述至少一个终端设备的可用于传输所述PSCCH的起始时域符号位置中的最大值M确定为所述第一参数，M为整数。
  20. 根据权利要求17至20中任一项所述的方法，其特征在于，所述方法还包括：
    所述网络设备向所述终端设备发送以下信息中的至少一种信息：所述PSCCH在一个时频单元中的起始时域符号位置、所述PSCCH在一个时频单元中所占据的时域符号个数、所述PSCCH在一个时频单元中的结束时域符号位置、所述PSCCH在一个时频单元中的频域起始位置、所述PSCCH在一个时频单元中的频域结束位置、和所述PSCCH在一个时频单元中的频域资源长度。
  21. 根据权利要求20所述的方法，其特征在于，所述PSCCH在一个时频单元中的起始时域符号位置通过时域符号的索引信息或相对于特定时域符号的偏移量表示，和/或所述PSCCH在一个时频单元中的频域起始位置通过频域单元的索引信息或相对于特定频域单元的偏移量表示，和/或所述PSCCH在一个时频单元中的频域资源长度通过频域资源大小指示信息表示。
  22. 根据权利要求17至21中任一项所述的方法，其特征在于，所述PSCCH调度的PSSCH占据的时域资源大于所述PSCCH占据的时域资源。
  23. 根据权利要求17至22中任一项所述的方法，其特征在于，所述PSCCH和所述PSCCH调度的PSSCH占据不同的时域资源。
  24. 根据权利要求17至23中任一项所述的方法，其特征在于，所述一个时频单元 在时域上包括一个时隙或一个子帧。
  25. 一种终端设备，其特征在于，所述终端设备包括：
    处理单元，用于确定物理侧行控制信道PSCCH在第一时频单元中的时频资源；
    收发单元，用于在所述时频资源上，接收或发送所述PSCCH。
  26. 根据权利要求25所述的终端设备，其特征在于，所述处理单元具体用于：
    确定所述PSCCH在所述第一时频单元中以下信息中的至少一种信息：起始时域符号位置、所占据的时域符号的个数、结束时域符号位置、频域起始位置、频域资源长度和频域结束位置。
  27. 根据权利要求26所述的终端设备，其特征在于，所述处理单元具体用于：
    根据第一参数，确定所述PSCCH在所述第一时频单元中的起始时域符号位置。
  28. 根据权利要求27所述的终端设备，其特征在于，所述第一参数包括在一个时频单元中用于接收PSCCH的第一个时域符号的位置K，K为整数。
  29. 根据权利要求28所述的终端设备，其特征在于，所述处理单元具体用于：
    将所述PSCCH在所述第一时频单元中的起始时域符号位置确定为K对应的时域符号位置；
    所述收发单元具体用于：
    从所述第一时频单元中时域符号位置为K对应的时域符号上开始接收或发送所述PSCCH。
  30. 根据权利要求28或29所述的终端设备，其特征在于，K为在一个时频单元中对应于至少一个终端设备的可用于传输PSCCH的起始时域符号位置中的最大值。
  31. 根据权利要求27所述的终端设备，其特征在于，所述第一参数包括在一个时频单元中需要侦听或测量的时域符号个数的最大值M，M为整数。
  32. 根据权利要求31所述的终端设备，其特征在于，所述处理单元具体用于：
    将所述PSCCH在所述第一时频单元中的起始时域符号位置确定为(M+i)对应的时域符号位置，其中，i为正整数，且i是与子载波间隔有关的参数；
    所述收发单元具体用于：
    从所述第一时频单元中时域符号位置为(M+i)对应的时域符号上开始接收或发送所述PSCCH。
  33. 根据权利要求31或32所述的终端设备，其特征在于，M为在一个时频单元中对应于至少一个终端设备的需要侦听或测量的时域符号个数中的最大值。
  34. 根据权利要求27至33中任一项所述的终端设备，其特征在于，所述第一参数通过协议预配置信息或网络设备的配置信息确定。
  35. 根据权利要求26至34中任一项所述的终端设备，其特征在于，所述处理单元具体用于：
    根据所述PSCCH所使用的聚合等级，确定所述PSCCH在所述第一时频单元中的频域资源长度。
  36. 根据权利要求25至35中任一项所述的终端设备，其特征在于，所述处理单元具体用于：
    根据协议预配置信息或网络设备的配置信息确定以下信息中的至少一种信息：所述PSCCH在所述第一时频单元中的起始时域符号位置、所述PSCCH在所述第一时频单元中占据的时域符号的个数、所述PSCCH在所述第一时频单元中的结束时域符号位置、所述PSCCH在所述第一时频单元中的频域起始位置、所述PSCCH在所述第一时频单元中的频域结束位置、和所述PSCCH在所述第一时频单元中的频域资源长度。
  37. 根据权利要求36所述的终端设备，其特征在于，所述PSCCH在所述第一时频单元中的起始时域符号位置通过时域符号的索引信息或相对于特定时域符号的偏移量表 示，和/或所述PSCCH在所述第一时频单元中的频域起始位置通过频域单元的索引信息或相对于特定频域单元的偏移量表示，和/或所述PSCCH在所述第一时频单元中的频域资源长度通过频域资源大小指示信息表示。
  38. 根据权利要求25至37中任一项所述的终端设备，其特征在于，所述PSCCH调度的PSSCH占据的时域资源大于所述PSCCH占据的时域资源。
  39. 根据权利要求25至37中任一项所述的终端设备，其特征在于，所述PSCCH和所述PSCCH调度的PSSCH占据不同的时域资源。
  40. 根据权利要求25至39中任一项所述的终端设备，其特征在于，所述第一时频单元在时域上包括一个时隙或一个子帧。
  41. 一种网络设备，其特征在于，所述网络设备包括：
    处理单元，用于确定第一参数；
    收发单元，用于向终端设备发送所述第一参数，所述第一参数用于所述终端设备确定物理侧行控制信道PSCCH在一个时频单元中的时域符号起始位置。
  42. 根据权利要求41所述的网络设备，其特征在于，所述处理单元具体用于：
    获取在一个时频单元中为至少一个终端设备配置的需要侦听或测量的时域符号个数；
    将所述至少一个终端设备的需要侦听或测量的时域符号个数中的最大值K确定为所述第一参数，K为整数。
  43. 根据权利要求41所述的网络设备，其特征在于，所述处理单元具体用于：
    获取在一个时频单元中为至少一个终端设备配置的可用于传输所述PSCCH的起始时域符号位置；
    将所述至少一个终端设备的可用于传输PSCCH的起始时域符号位置中的最大值M确定为所述第一参数，M为整数。
  44. 根据权利要求41至43中任一项所述的网络设备，其特征在于，所述收发单元还用于：
    向所述终端设备发送以下信息中的至少一种信息：所述PSCCH在一个时频单元中的起始时域符号位置、所述PSCCH在一个时频单元中所占据的时域符号个数、所述PSCCH在一个时频单元中的结束时域符号位置、所述PSCCH在一个时频单元中的频域起始位置、所述PSCCH在所述第一时频单元中的频域结束位置、和所述PSCCH在一个时频单元中的频域资源长度。
  45. 根据权利要求44所述的网络设备，其特征在于，所述PSCCH在一个时频单元中的起始时域符号位置通过时域符号的索引信息或相对于特定时域符号的偏移量表示，和/或所述PSCCH在一个时频单元中的频域起始位置通过频域单元的索引信息或相对于特定频域单元的偏移量表示，和/或所述PSCCH在一个时频单元中的频域资源长度通过频域资源大小指示信息表示。
  46. 根据权利要求41至45中任一项所述的网络设备，其特征在于，所述PSCCH调度的PSSCH占据的时域资源大于所述PSCCH占据的时域资源。
  47. 根据权利要求41至45中任一项所述的网络设备，其特征在于，所述PSCCH和所述PSCCH调度的PSSCH占据不同的时域资源。
  48. 根据权利要求41至47中任一项所述的网络设备，其特征在于，所述第一时频单元在时域上包括一个时隙或一个子帧。
  49. 一种终端设备，其特征在于，包括：处理器和存储器，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求1至16中任一项所述的方法。
  50. 一种网络设备，其特征在于，包括：处理器和存储器，该存储器用于存储计算 机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求17至24中任一项所述的方法。
  51. 一种芯片，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的设备执行如权利要求1至16中任一项所述的方法。
  52. 一种芯片，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的设备执行如权利要求17至24中任一项所述的方法。
  53. 一种计算机可读存储介质，其特征在于，用于存储计算机程序，所述计算机程序使得计算机执行如权利要求1至16中任一项所述的方法。
  54. 一种计算机可读存储介质，其特征在于，用于存储计算机程序，所述计算机程序使得计算机执行如权利要求17至24中任一项所述的方法。
  55. 一种计算机程序产品，其特征在于，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求1至16中任一项所述的方法。
  56. 一种计算机程序产品，其特征在于，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求17至24中任一项所述的方法。
  57. 一种计算机程序，其特征在于，所述计算机程序使得计算机执行如权利要求1至16中任一项所述的方法。
  58. 一种计算机程序，其特征在于，所述计算机程序使得计算机执行如权利要求17至24中任一项所述的方法。
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