WO2023197309A1 - Procédé et appareil de communication de liaison latérale - Google Patents

Procédé et appareil de communication de liaison latérale Download PDF

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Publication number
WO2023197309A1
WO2023197309A1 PCT/CN2022/087148 CN2022087148W WO2023197309A1 WO 2023197309 A1 WO2023197309 A1 WO 2023197309A1 CN 2022087148 W CN2022087148 W CN 2022087148W WO 2023197309 A1 WO2023197309 A1 WO 2023197309A1
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sci
resource
resources
pssch
symbol
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PCT/CN2022/087148
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English (en)
Chinese (zh)
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丁伊
张世昌
赵振山
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Oppo广东移动通信有限公司
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Priority to PCT/CN2022/087148 priority Critical patent/WO2023197309A1/fr
Publication of WO2023197309A1 publication Critical patent/WO2023197309A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present application relates to the field of communication technology, and more specifically, to methods and devices for sideline communication.
  • the present application provides a side-link communication method and device so that the mapping method of the second SCI can better match the physical layer structure of the unlicensed spectrum.
  • a method for sideline communication including: a terminal device receiving or sending second sideline control information SCI, wherein the resources carrying the second SCI are part of the first sideline transmission resources. , the modulation symbol corresponding to the second SCI is mapped to one or more resource block RB sets corresponding to the first sideline transmission resource.
  • a terminal device including: a transceiver unit, configured to receive or send second sideline control information SCI, wherein the resources carrying the second SCI are part of the first sideline transmission resources. , the modulation symbol corresponding to the second SCI is mapped to one or more resource block RB sets corresponding to the first sideline transmission resource.
  • a terminal including a processor, a memory, and a communication interface.
  • the memory is used to store one or more computer programs.
  • the processor is used to call the computer program in the memory to cause the terminal device to execute Some or all of the steps in the method of the first aspect.
  • embodiments of the present application provide a communication system, which includes the above-mentioned terminal and/or network device.
  • the system may also include other devices that interact with the terminal or network device in the solution provided by the embodiments of this application.
  • embodiments of the present application provide a computer-readable storage medium that stores a computer program, and the computer program causes a terminal to execute some or all of the steps in the method of the first aspect.
  • embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause the terminal to execute the above-mentioned Some or all of the steps in a method on the one hand.
  • the computer program product can be a software installation package.
  • embodiments of the present application provide a chip, which includes a memory and a processor.
  • the processor can call and run a computer program from the memory to implement the method described in the first aspect or the second aspect. Some or all of the steps.
  • the resource mapping of the second SCI is performed with the RB set as the granularity, that is, the modulation symbols of the second SCI can be mapped in one or more RB sets corresponding to the first sideline transmission resources, so that The mapping method of the second SCI matches the physical layer structure of the unlicensed spectrum.
  • Figure 1 is a wireless communication system 100 applied in the embodiment of the present application.
  • Figure 2 is a schematic diagram of resources occupied by PSSCH and resources occupied by PSCCH in this embodiment of the present application.
  • Figure 3 is a schematic diagram of the time slot structure of a sidelink.
  • Figure 4 is a schematic diagram of another time slot structure of a sidelink.
  • Figure 5 is a schematic diagram of the IRB structure.
  • Figure 6 is a schematic diagram of an RB set based on the IRB structure.
  • Figure 7 is a flow chart of a side communication method according to an embodiment of the present application.
  • Figure 8 is a schematic diagram of carrying second SCI sideline transmission resources according to an embodiment of the present application.
  • Figure 9 is a schematic diagram of carrying second SCI sideline transmission resources according to another embodiment of the present application.
  • Figure 10 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • Figure 11 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 1 is a wireless communication system 100 applicable to the embodiment of the present application.
  • the wireless communication system 100 may include a network device 110 and terminals 121 to 129.
  • Network device 110 may provide communication coverage for a specific geographic area and may communicate with terminals located within the coverage area.
  • terminals can communicate with each other through a sidelink (SL).
  • Sidelink communication can also be called proximity services (ProSe) communication, unilateral communication, side chain communication, device to device (D2D) communication.
  • ProSe proximity services
  • D2D device to device
  • sidelink data is transmitted between terminals through sidelinks.
  • the sideline data may include data and/or control signaling.
  • the sidelink data can be, for example, a physical sidelink control channel (PSCCH), a physical sidelink shared channel (physical sidelink control channel, PSSCH), or a PSCCH demodulation reference signal (demodulation reference signal, DMRS), PSSCH DMRS, physical sidelink feedback channel (feedback channel, PSFCH), etc.;
  • PSCCH physical sidelink control channel
  • PSSCH physical sidelink shared channel
  • DMRS demodulation reference signal
  • PSSCH DMRS physical sidelink feedback channel
  • feedback channel PSFCH
  • sidelink communication there are four scenarios based on whether the terminal in the sidelink is within the coverage of the network device.
  • Scenario 1 The terminal performs sidelink communication within the coverage of the network device.
  • Scenario 2 Some terminals perform sidelink communication within the coverage of network equipment.
  • Scenario 3 The terminal performs sidelink communication outside the coverage of the network device.
  • terminals 121-122 can communicate through side links, and terminals 121-122 are all within the coverage of network device 110, or in other words, terminals 121-122 are all on the same network device. 110 coverage area.
  • the network device 110 may send configuration signaling to the terminals 121 to 122, and accordingly, the terminals 121 to 122 communicate through the sidelink based on the configuration signaling.
  • terminals 123-124 can communicate through side links, and terminal 123 is within the coverage of the network device 110, and terminal 124 is outside the coverage of the network device 110.
  • the terminal 123 receives the configuration information of the network device 110 and communicates through the sidelink based on the configuration of the configuration signaling.
  • the terminal 124 since the terminal 124 is located outside the coverage of the network device 110, it cannot receive the configuration information of the network device 110.
  • the terminal 124 can use the configuration information based on pre-configuration and/or Or the configuration information sent by the terminal 123 located within the coverage area is used to obtain the configuration of the sidelink communication, so as to communicate with the terminal 123 through the sidelink based on the obtained configuration.
  • the terminal 123 may send the above configuration information to the terminal 124 through a physical sidelink broadcast channel (PSBCH) to configure the terminal 124 to communicate through the sidelink.
  • PSBCH physical sidelink broadcast channel
  • terminals 125 to 129 are all located outside the coverage of the network device 110 and cannot communicate with the network device 110 .
  • the terminal can configure sidelink communication based on preconfiguration information.
  • the terminals 127 to 129 located outside the coverage of the network device can form a communication group, and the terminals 127 to 129 in the communication group can communicate with each other.
  • the terminal 127 in the communication group can serve as a central control node, also called a cluster header terminal (CH).
  • the terminals in other communication groups can be called "group members".
  • the terminal 127 serving as CH may have one or more of the following functions: responsible for the establishment of a communication group; joining and leaving group members; performing resource coordination, allocating sideline transmission resources to group members, and receiving sideline feedback information from group members; Perform resource coordination and other functions with other communication groups.
  • Figure 1 exemplarily shows one network device and multiple terminal devices.
  • the wireless communication system 100 may include multiple network devices and the coverage of each network device may include other numbers. terminal equipment, the embodiment of this application does not limit this.
  • the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.
  • the terminal in the embodiment of this application may also be called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT) , remote station, remote terminal, mobile device, user terminal, terminal equipment, wireless communications equipment, user agent or user device.
  • the terminal device in the embodiment of the present application may be a device that provides voice and/or data connectivity to users, and may be used to connect people, things, and machines, such as handheld devices and vehicle-mounted devices with wireless connection functions.
  • the terminal device in the embodiment of the present application can be a mobile phone (mobile phone), a tablet computer (Pad), a notebook computer, a handheld computer, a mobile internet device (mobile internet device, MID), a wearable device, a virtual reality (virtual reality, VR) equipment, augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, smart Wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.
  • the UE may be used to act as a base station.
  • a UE may act as a scheduling entity that provides sidelink data between UEs in V2X or D2D, etc.
  • cell phones and cars use side-travel data to communicate with each other.
  • Cell phones and smart home devices communicate between each other without having to relay communication signals through base stations.
  • the network device in the embodiment of the present application may be a device used to communicate with a terminal device.
  • the network device may also be called an access network device or a wireless access network device.
  • the network device may be a base station.
  • the network device in the embodiment of this application may refer to a radio access network (radio access network, RAN) node (or device) that connects the terminal device to the wireless network.
  • radio access network radio access network, RAN node (or device) that connects the terminal device to the wireless network.
  • the base station can broadly cover various names as follows, or be replaced with the following names, such as: Node B (NodeB), evolved base station (evolved NodeB, eNB), next generation base station (next generation NodeB, gNB), relay station, Access point, transmission point (transmitting and receiving point, TRP), transmitting point (TP), main station MeNB, secondary station SeNB, multi-standard wireless (MSR) node, home base station, network controller, access node , wireless node, access point (AP), transmission node, transceiver node, base band unit (BBU), radio remote unit (Remote Radio Unit, RRU), active antenna unit (active antenna unit) , AAU), radio head (remote radio head, RRH), central unit (central unit, CU), distributed unit (distributed unit, DU), positioning node, etc.
  • NodeB Node B
  • eNB evolved base station
  • next generation NodeB next generation NodeB, gNB
  • relay station Access point
  • the base station may be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof.
  • a base station may also refer to a communication module, modem or chip used in the aforementioned equipment or devices.
  • the base station can also be a mobile switching center and a device that undertakes base station functions in device-to-device D2D, vehicle-to-everything (V2X), machine-to-machine (M2M) communications, and in 6G networks.
  • Base stations can support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific equipment form used by the network equipment.
  • Base stations can be fixed or mobile.
  • a helicopter or drone may be configured to act as a mobile base station, and one or more cells may move based on the mobile base station's location.
  • a helicopter or drone may be configured to serve as a device that communicates with another base station.
  • the network device in the embodiment of this application may refer to a CU or a DU, or the network device includes a CU and a DU.
  • gNB can also include AAU.
  • Network equipment and terminal equipment can be deployed on land, indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the sky. In the embodiments of this application, the scenarios in which network devices and terminal devices are located are not limited.
  • autonomous driving technology can be integrated with communication systems, or in other words, data interaction between vehicle-mounted devices needs to be realized through communication systems. Therefore, higher requirements are placed on the communication system. For example, communication systems are required to support higher throughput, lower latency, higher reliability, larger coverage, more flexible resource allocation, etc.
  • LTE-V2X only broadcast sidelink communication is supported between terminals.
  • unicast and multicast transmission methods are introduced in NR-V2X.
  • terminal 121 and terminal 122 can communicate through unicast transmission.
  • terminal 121 sends sidelink data through a sidelink
  • terminal 122 serves as the only receiving device to receive the sidelink data.
  • the terminals receiving sideline data may be all terminals in a communication group, or the terminals receiving sideline data may be all terminals within a certain transmission distance.
  • a communication group including terminals 127-129 when terminal 127 sends sideline data in a multicast manner, other terminals 128-129 in the communication group receive the sideline data.
  • the terminals within the preset range include terminals 127-129.
  • terminal 127 sends sideline data in a multicast manner other terminals 128-129 within the preset range receive the sideline data.
  • Receiving terminal for sideline data for sideline data.
  • the terminal that receives the sideline data can be any terminal around the terminal that is the sending end.
  • terminals 121 to 124 and 126 to 129 located around terminal 125 can all serve as receivers of the sideline data.
  • mode 1 two resource allocation methods for sidelink transmission resources are defined, mode 1 and mode 2.
  • Mode 1 the network device schedules side transmission resources for the terminal device.
  • Mode 1 can be divided into two methods: dynamic resource allocation (dynamic resource allocation) and sidelink configured grant (SL CG).
  • dynamic resource allocation network equipment can allocate sidelink transmission resources to terminals by sending downlink control information (DCI).
  • DCI downlink control information
  • the terminal In the sidelink configuration authorization mode, when the terminal is configured with sidelink transmission resources, if the terminal has data to be sent, the terminal can use the configured sidelink transmission resources to transmit data without re-applying to the network device for sidelink transmission. Line transmission resources. Therefore, the resource configuration method using configuration authorization can reduce the transmission delay of the sidelink.
  • Type 1 of configuration authorization sidelink transmission resource configuration is completely based on radio resource control (RRC) signaling.
  • Type 2 of configuration authorization the sidelink transmission resource configuration in the communication system can be configured by RRC signaling and layer 1 (layer 1, L1) signaling, where L1 signaling is used to indicate the activation of the RRC configuration. and deactivation.
  • the network device can schedule sidelink transmission resources for a single transmission for the terminal. In other implementations, the network device can also configure semi-static sidelink transmission resources for the terminal.
  • terminal devices 121 to 123 are located within the coverage of network device 110 , and network device 110 can allocate sidelink transmission resources to terminal devices 121 to 123 .
  • the terminal independently selects sidelink transmission resources in the resource pool.
  • the processes performed by the terminal include a resource detection process and/or a resource selection process.
  • the terminal can identify the occupation of sidelink transmission resources by demodulating sidelink control information (SCI).
  • SCI sidelink control information
  • the terminal can also evaluate the occupation of sidelink transmission resources by measuring the received power of the sidelink.
  • the terminal devices 124 to 129 are located outside the coverage of the network device 110 , and the terminal devices 124 to 129 can independently select sidelink transmission resources through the above-mentioned mode 2.
  • PSCCH physical sidelink control channel
  • PSSCH physical sidelink shared channel
  • PSCCH is used to carry the first SCI
  • PSSCH is used to carry the second SCI.
  • PSCCH and/or PSSCH are also used to carry other information.
  • the PSSCH can also be used to carry data. The embodiments of the present application do not limit this.
  • first-stage SCI also known as “first-stage SCI or first-stage-SCI”
  • first-stage-SCI can carry information related to resource listening, for example, including the time domain and frequency domain resources of the indicated PSSCH, So that other terminals can perform resource exclusion and resource selection based on the first SCI.
  • the above-mentioned second SCI which can also be called “second-stage SCI or second-stage SCI (2nd-stage-SCI)", can carry other information related to PSSCH demodulation. Since the first-order SCI provides relevant information about the second-order SCI, the second-order SCI can use a variety of different formats and code rates, but the receiving terminal (or the terminal that receives the second-order SCI) does not need to be blind to the second-order SCI. Check. Therefore, the design of the second-order SCI can effectively reduce the number of bits of the first-order SCI, improve the decoding performance of the first-order SCI, and thereby improve the accuracy of resource listening.
  • one time slot may include 14 side row symbols numbered 0 to 13.
  • the first side row symbol (that is, the side row symbol numbered 0) is the side row symbol used for automatic gain control (automatic gain control, AGC).
  • AGC automatic gain control
  • the received power can be adjusted in the side row symbols used as AGC to adjust the received power to a power suitable for demodulation.
  • the content in the side row symbol numbered 1 can be repeatedly sent on the side row symbol used as AGC.
  • the last side row symbol (that is, the side row symbol numbered 13) is the guard period (GP) symbol.
  • the side row symbols occupied by the PSCCH can start from the side row symbol numbered 1 and occupy 2 or 3 consecutive side row symbols. That is, the PSCCH resources in the timeslot include sidelink symbols numbered 1 to 3, or the PSCCH resources in the timeslot include sidelink symbols numbered 1 to 2.
  • PSCCH can occupy ⁇ 10,12 15,20,25 ⁇ physical resource blocks (PRB).
  • PRB physical resource blocks
  • the sub-channel is the minimum granularity of PSSCH resource allocation specified in NR-V2X
  • the number of PRBs occupied by PSCCH usually needs to be less than or equal to the number of PRBs contained in a sub-channel in the resource pool, so as to avoid causing any impact on PSSCH resource selection or allocation. Additional restrictions.
  • the number of sidelink symbols occupied by PSSCH is related to whether the time slot contains sidelink symbols occupied by physical sidelink feedback channel (PSFCH).
  • the time slot may contain sideline symbols of PSFCH used to transmit HARQ feedback information. If the time slot contains side row symbols of PSFCH, then see Figure 3.
  • Symbol 10 in the time slot is used as the GAP between PSSCH and PSFCH, symbol 11 is used for the AGC received by PSFCH, and symbol 12 is the PSFCH symbol.
  • the setting of symbol 10 is because the terminal equipment may transmit on the PSSCH and receive on the PSFCH, and requires GP symbols for transceiver conversion.
  • symbols 10 to 12 in Figure 3 are all used for PSSCH transmission. That is to say, if the PSFCH is not transmitted in the time slot, the side row symbols occupied by the PSSCH are symbols numbered 1 to 12. If the PSFCH is transmitted in the time slot, the side row symbols occupied by the PSSCH are symbols numbered 1 to 9.
  • PSFCH whether PSFCH is transmitted in a time slot may depend on the resource pool configuration, and the symbols corresponding to PSFCH may appear once every 1, 2, or 4 time slots.
  • sidelink symbol introduced above can be understood as a resource unit for sidelink transmission in the time domain, and can be replaced by symbols, orthogonal frequency division multiplexing (OFDM) symbols, etc.
  • OFDM orthogonal frequency division multiplexing
  • the bit sequence corresponding to the second SCI is modulated to generate a modulation symbol sequence corresponding to the second SCI, and then each modulation symbol is carried on a resource element (resource element, re), and then through The RE carrying the second SCI is sent.
  • resource element resource element
  • the number of modulation symbols Q′ SCI2 corresponding to the second SCI is the same as the number of REs carrying the second SCI. Currently, it can be calculated by the following formula:
  • O SCI2 represents the number of bits of the second SCI information, which can usually be determined by the format of the second SCI.
  • L SCI2 indicates the CRC length of the second SCI, usually 24 bits.
  • the code rate offset of the second SCI is the code rate offset of the second SCI.
  • the minimum optional value is 1.125, and the maximum optional value is 20.
  • the above four optional values can be configured by radio resource control (RRC) signaling.
  • RRC radio resource control
  • the value is selected by the sending terminal and indicated by the "Second SCI code rate offset" field in SCI format 1-A of the first SCI.
  • R represents the code rate corresponding to the MCS index indicated by the "MCS" field in SCI format 1-A.
  • the meaning of may change based on the relationship between PSCCH resources and PSSCH resources.
  • the frequency domain width of the PSCCH resource when the frequency domain width of the PSCCH resource is the same as the frequency domain width of the PSSCH resource, It can represent the number of REs that can be used to map the second SCI on the OFDM symbol corresponding to the l-th PSCCH and PSSCH.
  • the frequency domain width of the PSCCH resource is equal to a sub-channel (sub-channel)
  • the frequency domain width of the PSSCH resource is also equal to a sub-channel, that is, the frequency domain width of the PSCCH resource is equal to the frequency domain width of the PSSCH resource.
  • It can represent the number of REs that can be used to map the second SCI on the OFDM symbol corresponding to the l-th PSCCH and PSSCH. It should be noted that in this case, the number of REs available for mapping the second SCI on the OFDM symbol corresponding to the l-th PSCCH may be 0.
  • the frequency domain width of the PSCCH resource when the frequency domain width of the PSCCH resource is smaller than the frequency domain width of the PSSCH resource, It can represent the number of REs that can be used to map the second SCI on the OFDM symbol corresponding to the l-th PSSCH.
  • the frequency domain width of the PSCCH resource is smaller than the frequency domain width of the PSSCH resource.
  • the above Indicates the total number of REs included in the sidelink transmission resources determined by the terminal in the l-th PSCCH and/or PSSCH corresponding symbol.
  • ⁇ represents the scaling factor of the number of REs corresponding to the second SCI configured by RRC.
  • the value range of ⁇ is 0 to 11, which represents the number of remaining REs in the PRB where the last second SCI modulation symbol is located. This parameter is used to ensure that the resources occupied by the second SCI are an integer number of PRBs.
  • the modulation symbols corresponding to the second SCI may be mapped into the time slot.
  • Figure 4 shows the time slot structure after mapping the second SCI. Referring to Figure 4, it can be seen that the modulation symbols corresponding to the second SCI are mapped in the REs that can be used to transmit PSSCH within symbols 1 to 4, and, the second The modulation symbol corresponding to the SCI is not mapped to the RE transmitting DMRS during the mapping process.
  • Interlaced resource block (IRB)
  • channel occupied bandwidth occupied channel bandwidth, OCB
  • power spectral density power spectral density
  • the channel bandwidth occupied shall not be less than 80% of the total channel bandwidth. That is to say, the frequency domain span between the lowest PRB in the frequency domain and the highest PRB in the frequency domain occupied by the terminal equipment for transmission accounts for 80% of the total bandwidth.
  • the IRB structure is introduced in the NR system, which changes the continuous RBs occupied in the frequency domain shown in Figure 3 into discrete RBs occupied in the frequency domain.
  • the frequency domain resources occupied by the terminal equipment are both It meets the 80% frequency domain span stipulated by OCB, but does not need to continuously occupy 80% of the bandwidth in the frequency domain, thus reserving resources for other terminal equipment transmission.
  • a comb resource may include discrete N PRBs in the frequency domain. Assume that M comb resources are included in the frequency band, then the PRB included in the m-th comb resource (or "comb") is ⁇ m, M+m, 2M+m, 3M+m,... ⁇ , Among them, N, M, and m are positive integers.
  • the IRB structure is introduced below in conjunction with Figure 5.
  • the system bandwidth includes 20 PRBs, namely PRB0 ⁇ PRB19, and each PRB corresponds to 12 subcarriers.
  • the frequency domain interval of two adjacent PRBs in a comb tooth is the same, that is, the distance between them is the same.
  • the PRB included in a comb tooth can also be called IRB.
  • the terminal device In the NR system, if the terminal device communicates on the unlicensed spectrum, it needs to use the listen before talk (LBT) mechanism to communicate. That is, the terminal device can communicate on the corresponding resource only after LBT is successful.
  • LBT listen before talk
  • the LBT mechanism is executed with the RB set as the granularity. Therefore, the RB set can also be called an LBT subband. For example, if the communication device wants to send data on a certain RB set, it needs to perform LBT on the RB set, and only after the LBT is successful, data can be transmitted through the RB set.
  • An RB set may include one or more RBs.
  • the NR system uses an RB set in combination with an IRB structure when communicating based on unauthorized resources. That is to say, the RBs in the RB set have an IRB structure, or in other words, the RB set includes multiple IRBs.
  • the bandwidth part (bandwidth part) BWP configured for communication equipment includes an integer number of RB Sets.
  • a common resource block includes multiple RB sets: RB set 1 to RB set 3.
  • Guard bands can be set between different RB sets.
  • the RBs included in each RB set are comb-tooth structures. Taking RB set 1 as an example, it is assumed that RB set 1 can contain 5 comb-tooth IRBs, or in other words, RB set 1 shown in Figure 6 contains 5 IRBs.
  • RB corresponds to the IRB with comb index 0 to 4 in Figure 5.
  • the RB set corresponding to the BWP in the common resource block ie, RB set 1 and RB set 2 may be allocated to the terminal device.
  • the physical layer structure of unlicensed spectrum is based on RB sets, and the LBT mechanism is also performed with the RB set as the granularity.
  • the traditional mapping method of the second SCI is designed based on the physical layer structure of the licensed spectrum and is not suitable for the side link communication scenario of the unlicensed spectrum. In other words, the traditional mapping method of the second SCI is different from the mapping method of the unlicensed spectrum.
  • the physical layer structure does not match.
  • embodiments of the present application provide a side communication solution.
  • the flow chart of the side communication method according to the embodiment of the present application is introduced below with reference to FIG. 7 .
  • the method shown in Figure 7 includes step S710.
  • step S710 the first terminal device sends the second SCI to the second terminal device.
  • the resources carrying the second SCI belong to some or all of the first sidelink transmission resources, and the modulation symbols (or sidelink symbols) corresponding to the second SCI are mapped to one or more corresponding to the first sidelink transmission resources.
  • the modulation symbols (or sidelink symbols) corresponding to the second SCI are mapped to one or more corresponding to the first sidelink transmission resources.
  • first side-link transmission resources may be configured by the network device.
  • the first side-link transmission resources may be allocated using Mode 1 above.
  • the above-mentioned first sidelink transmission resource may also be selected by the terminal device. For example, it may be determined in mode 2.
  • the above-mentioned first sidelink transmission resource may also be determined in other ways.
  • the first sidelink transmission resource may be randomly selected by the terminal device, which is not limited in this embodiment of the present application.
  • the resource mapping of the second SCI is performed with the RB set as the granularity, that is, the modulation symbols of the second SCI can be mapped in one or more RB sets corresponding to the first sideline transmission resources, so that The mapping method of the second SCI matches the physical layer structure of the unlicensed spectrum.
  • the second SCI can be transmitted through the PSSCH. Therefore, the modulation symbol corresponding to the second SCI can be mapped to the RE (also called the "first RE") that can be used to transmit the PSSCH.
  • the RE also called the "first RE”
  • one or more RB sets include the first RE
  • the first RE is the RE determined by the terminal device and can be used to transmit the PSSCH
  • the modulation symbol corresponding to the second SCI is mapped to the first RE in the one or more RB sets.
  • the above one or more RB sets may be RB sets corresponding to PSCCH resources.
  • the resources carrying the second SCI are part of the first sidelink transmission resources.
  • the first sidelink transmission resources also include PSCCH resources.
  • the modulation corresponding to the second SCI is mapped.
  • the modulation symbols corresponding to the second SCI may not be mapped on the PSCCH resources, or the modulation symbols corresponding to the second SCI are not mapped to the PSCCH resources, or the PSCCH resources do not overlap with the resources carrying the second SCI.
  • the above one or more RB sets may be RB sets corresponding to PSSCH resources.
  • the first sidelink transmission resources also include PSSCH resources.
  • the above one or more RB sets may be RB sets corresponding to PSSCH resources. It can be understood that one or more RB sets may be all RB sets corresponding to PSSCH resources, or one or more RB sets may be part of PSSCH resources. RB collection.
  • the RB set with the lowest position in the frequency domain corresponding to the PSSCH resource can be or is known by the terminal device without calculation.
  • the RB set with the highest frequency domain position corresponding to the PSSCH resource needs to be determined based on the RB set with the lowest frequency domain position and the number of RB sets corresponding to the PSSCH resource.
  • the multiple RB sets corresponding to the first sidelink transmission resource may be configured to include multiple RB sets starting from the RB set with the lowest frequency domain position corresponding to the PSSCH resource and being continuous in the frequency domain.
  • the RB set is the RB set with the lowest frequency domain position corresponding to the PSSCH resource.
  • indication information (such as the first SCI) may also be used to indicate, among the RB sets corresponding to the PSSCH resources, the RB set corresponding to the above one or more RB sets (also known as the "target RB set") . That is, the one or more RB sets are target RB sets in the RB resources corresponding to the PSSCH resources, where the target RB set is indicated by the first SCI carried in the first sidelink transmission resource.
  • the second SCI usually carries other information related to PSSCH demodulation. Therefore, for the receiving terminal, it usually needs to receive the second SCI and obtain the information related to PSSCH demodulation before it can successfully demodulate the PSSCH. Then, it is hoped that the resource carrying the second SCI is no later than the resource carrying data in the PSSCH in the time domain. Therefore, the modulation symbols corresponding to the second SCI can be mapped to one or more RB sets in a frequency domain first and then a time domain manner.
  • the method of first frequency domain and then time domain can be understood as mapping REs corresponding to different subcarriers in the first symbol first, and after all REs in the first symbol are mapped, then mapping REs in the second symbol, where, The second symbol is later than the first symbol in the time domain.
  • This mapping method of first frequency domain and then time domain can make the modulation symbols corresponding to the second SCI preferentially mapped into earlier symbols in the time domain, so that the receiving terminal can receive the second SCI preferentially.
  • the second SCI can also be mapped in the time domain first and then in the frequency domain, or in a time-frequency interleaved manner, which is not limited in the embodiment of the present application.
  • the mapping method of the modulation symbols corresponding to the second SCI is introduced below with reference to the figure. For the sake of simplicity, it will not be described again here.
  • the modulation symbols corresponding to the second SCI may be mapped starting from the starting symbol of the resources available for PSSCH transmission.
  • the modulation symbol corresponding to the second SCI can also be mapped from any other symbol.
  • the modulation symbols corresponding to the second SCI can be mapped from low to high in the frequency domain, avoiding the need for the modulation symbols corresponding to the second SCI to be mapped in the frequency domain.
  • mapping from high to low it is necessary to additionally calculate the position of the highest RE in the frequency domain among the REs that can be mapped to the modulation symbol corresponding to the second SCI.
  • the modulation symbols corresponding to the second SCI can also be mapped in the frequency domain in a high-to-low manner.
  • the mapping method of the modulation symbols corresponding to the second SCI in the frequency domain can be combined with the method of first frequency domain and then time domain introduced above. For example, it can be from low to high in the frequency domain. , map the modulation symbols corresponding to the second SCI to all REs in the first symbol, and then map the modulation symbols corresponding to the second SCI to all REs in the second symbol in a frequency domain from low to high. The second symbol is later than the first symbol in the time domain.
  • the following will be introduced in detail with reference to the figure. For the sake of brevity, no further details will be given here.
  • the above frequency domain mapping method can also be used alone, and is not combined with the sequence of first frequency domain and then time domain. This is not limited in the embodiments of the present application.
  • the first sidelink transmission resources may also include resources carrying PSSCH demodulation reference signal (DMRS).
  • DMRS PSSCH demodulation reference signal
  • the resource location carrying the PSSCH DMRS is closer to the resource location carrying the second SCI, the channel state estimated based on the PSSCH DMRS is more similar to the channel state of the second SCI, which is more conducive to demodulating the second SCI in the PSSCH. Therefore, the modulation symbol corresponding to the second SCI can be mapped in the time domain from the starting symbol (also called the "first symbol") of the resource carrying PSSCH DMRS, and skip the resource carrying PSSCH DMRS.
  • the starting symbol of the resource carrying PSSCH DMRS is the first symbol
  • the modulation symbol corresponding to the second SCI is mapped from the first symbol in the time domain
  • the resource carrying the second SCI does not overlap with the resource carrying PSSCH DMRS.
  • the above mapping method can cause the modulation symbols corresponding to the second SCI to be mapped to resources located around the resources carrying the PSSCH DMRS, or in other words, can cause some or all of the modulation symbols corresponding to the second SCI to be interleaved and mapped with the PSSCH DMRS on the first side In terms of line transmission resources, it is helpful to improve the success rate of demodulating the second SCI.
  • the first sidelink transmission resource may also include REs for carrying PTRS (also called "second REs").
  • RE conflict of symbols means that the RE carrying the PTRS is skipped when mapping the modulation symbol corresponding to the second SCI, or in other words, the modulation symbol corresponding to the second SCI is not mapped to the second RE in the first sideline transmission resource.
  • mapping method of the modulation symbols corresponding to the second SCI in the embodiment of the present application describes the mapping method of the modulation symbols corresponding to the second SCI in the embodiment of the present application.
  • determination of the number of modulation symbols corresponding to the second SCI in the embodiment of the present application describes the determination of the number of modulation symbols corresponding to the second SCI in the embodiment of the present application.
  • the number of modulation symbols corresponding to the second SCI is determined based on the number of the third RE, where the third RE is the RE determined by the terminal device for transmitting the PSSCH, and the third RE is located in the time domain Within symbols corresponding to PSCCH and/or PSSCH, and the third RE is located within one or more RB sets in the frequency domain.
  • the number of modulation symbols corresponding to the second SCI may also be determined based on the number of third REs and the number of bits of the second SCI.
  • the number of modulation symbols corresponding to the second SCI may also be determined based only on the number of bits of the second SCI.
  • the number of modulation symbols corresponding to the second SCI is equal to the number of REs mapping the modulation symbols corresponding to the second SCI, or in other words, the number of REs that carry the modulation symbols corresponding to the second SCI The number of REs.
  • the following uses determining the number of modulation symbols corresponding to the second SCI based on the number of the third RE and the number of bits of the second SCI as an example to introduce how to determine the number of modulation symbols corresponding to the second SCI in the embodiment of the present application.
  • the number of modulation symbols corresponding to the second SCI is expressed as Q' SCI2
  • the RB set corresponding to the first sideline transmission resource is RB set 1.
  • the number of modulation symbols corresponding to the second SCI can be calculated by the following formula:
  • O SCI2 represents the number of bits of the second SCI information, which can usually be determined by the format of the second SCI.
  • L SCI2 indicates the CRC length of the second SCI, usually 24 bits.
  • the code rate offset of the second SCI is the code rate offset of the second SCI.
  • the minimum optional value is 1.125, and the maximum optional value is 20.
  • the above four optional values can be configured by radio resource control RRC signaling.
  • RRC signaling can be configured by radio resource control RRC signaling.
  • the value of is selected by the sending terminal and indicated by the "Second SCI code rate offset" field in SCI format 1-A.
  • R represents the code rate corresponding to the MCS index indicated by the "MCS" field in SCI format 1-A.
  • the meaning of may change based on the relationship between PSCCH resources and PSSCH resources.
  • the frequency domain resources occupied by PSCCH are the same as the frequency domain resources occupied by PSSCH, It can represent the number of REs that can be used to map the second SCI on the OFDM symbol corresponding to the l-th PSCCH and PSSCH in RB set 1.
  • Figure 8. Assume that PSCCH and PSSCH both occupy one comb or one IRB in the frequency domain. That is, PSCCH and PSSCH occupy the same frequency domain resources.
  • Symbols 1 to 3 are symbols corresponding to PSCCH, and symbols 4 to 12 are PSSCH.
  • the corresponding symbol can represent the number of REs that can be used to map the second SCI on the OFDM symbol corresponding to the l-th PSCCH and PSSCH in RB set 1. It should be noted that in this case, the number of REs available for mapping the second SCI on the OFDM symbol corresponding to the l-th PSCCH in RB set 1 may be 0.
  • the frequency domain resources occupied by PSCCH are smaller than the frequency domain resources occupied by PSSCH
  • It can represent the number of REs that can be used to map the second SCI on the OFDM symbol corresponding to the l-th PSSCH in RB set 1.
  • the frequency domain resources occupied by PSCCH are smaller than those occupied by PSSCH.
  • Symbols 1 to 3 are symbols corresponding to PSCCH, and symbols 1 to 12 are symbols corresponding to PSSCH.
  • It can represent the number of REs that can be used to map the second SCI on the OFDM symbol corresponding to the l-th PSSCH.
  • the above Indicates the total number of REs included in the sidelink transmission resources determined by the terminal in the l-th PSCCH and/or PSSCH corresponding symbol in RB set 1.
  • It is a parameter determined by the time slot structure of the sidelink, indicating the number of OFDM symbols that can be used for sidelink transmission in the current timeslot except the first AGC symbol and the last GP symbol. Indicates that it is determined based on the PSFCH configuration and/or the PSFCH overhead indication field in the first SCI, and the value is 0 or 3.
  • ⁇ represents the scaling factor of the number of REs corresponding to the second SCI configured by RRC.
  • the value range of ⁇ is 0 to 11, which represents the number of remaining REs in the PRB where the last second SCI modulation symbol is located. This parameter is used to ensure that the resources occupied by the second SCI are an integer number of PRBs.
  • the channel bandwidth occupied by the terminal equipment is not less than 80% of the total channel bandwidth.
  • the RBs in one or more RB sets corresponding to the first sideline transmission resource can be set to have an IRB structure, or in other words, The first sideline transmission resource is a transmission resource based on the IRB structure. In this way, different terminal devices can occupy different IRBs for side-line communication, so that when the channel bandwidth occupied by each terminal device meets the OCB regulations, information from multiple terminal devices can be transmitted simultaneously in one time slot.
  • Figure 8 takes the mapping of the second SCI in the RB set corresponding to the PSCCH as an example
  • Figure 9 takes the mapping of the second SCI in the PSSCH Mapping the second SCI in the corresponding RB set is introduced as an example.
  • Figure 8 shows a schematic diagram of carrying the second SCI sideline transmission resource according to the embodiment of the present application.
  • the RBs in RB set 1 and RB set 2 have an IRB structure, and the RBs in RB set 1 and RB set 2 are divided into comb teeth 0 to comb teeth 4.
  • the number of the comb teeth corresponding to each RB can be Indicated by the numbers within each RB in Figure 8.
  • the terminal equipment selects all RBs in RB set 1 and RBs belonging to comb 2 in RB set 2 as sidelink transmission resources.
  • the RB sets corresponding to PSSCH are RB set 1 and RB set 2, and the RB set corresponding to PSCCH is RB set 1.
  • the modulation symbol corresponding to the second SCI is mapped in the RB set corresponding to the PSCCH (that is, RB set 1).
  • the resources in symbol 0 are used as AGC, the resources corresponding to symbol 13 are used as GP, and the RBs corresponding to comb 0 in symbols 1 to 3 are PSCCH resources. Then, the modulation symbol corresponding to the second SCI can be mapped within the resources available for transmitting PSSCH in RB set 1.
  • the modulation symbol corresponding to the second SCI can be mapped starting from the RE with the lowest frequency domain position in symbol 1, that is, starting with the RE with the lowest frequency domain position in the RB numbered 0 in symbol 1 as the starting RE, where symbol 1 is the first OFDM symbol carrying PSSCH DMRS. It should be noted that since the RB numbered 0 in symbol 1 is a PSCCH resource, the PSCCH resource needs to be skipped when mapping the modulation symbol corresponding to the second SCI. That is to say, the modulation symbol corresponding to the second SCI is actually Mapping starts from the RB belonging to comb 1 in symbol 1 as the starting RB. In addition, during the mapping process, the mapping can be performed in the RB set 1 in the frequency domain first and then the time domain.
  • the modulation symbol corresponding to the second SCI can be mapped with RE as the granularity during the mapping process, that is, each modulation symbol is mapped to one RE.
  • FIG. 8 only shows the sidelink transmission resources at the RB granularity, and the sidelink transmission resources at the RE granularity are not shown in the figure.
  • the following describes the mapping method of the modulation symbols corresponding to the second SCI in conjunction with Figure 8.
  • the number of modulation symbols corresponding to the second SCI may be calculated based on the formula introduced above. See Figure 8, That is, the number of symbols that can be used for sideline transmission in addition to the symbols used for AGC and GP is 12.
  • the value of l is from 0 to 8, indicating that the symbols used to transmit PSSCH are symbol 1 to symbol 9.
  • l equal to 0 corresponds to the OFDM symbol corresponding to the first PSSCH, which is symbol 1 in Figure 8 .
  • is the number of REs available for PSSCH transmission in RB set 1 in OFDM symbol 1 is the number of REs that can be used to transmit PSCCH in RB set 1 in symbol 1.
  • mapping After determining the number of modulation symbols corresponding to the second SCI, mapping can be performed in the following manner.
  • the modulation symbol corresponding to the second SCI is mapped starting from the RE with the lowest frequency domain position in the RB numbered 0 in symbol 1 as the starting RE.
  • RB0 of symbol 1 is a PSCCH resource, Therefore, the PSCCH resource is skipped in the process of mapping the modulation symbol corresponding to the second SCI. That is to say, the modulation symbol corresponding to the second SCI is actually obtained from the RE with the lowest frequency domain position in RB1 in symbol 1 (see 810 position) to start mapping.
  • the modulation symbols corresponding to the second SCI are respectively mapped to the REs in symbol 1 in a frequency domain from low to high within symbol 1. If there are no remaining REs in symbol 1 of RB set 1 that can be used to map the second SCI, at this time, you can continue to start mapping with the RE with the lowest frequency domain position in symbol 2 as the starting RE, and in symbol 2 of RB set 1 according to The remaining modulation symbols are mapped to REs within symbol 2 in a frequency domain manner from low to high. By analogy, until all modulation symbols corresponding to the second SCI are mapped within the PSSCH resources available for transmission. Referring to Figure 8, when the modulation symbols corresponding to the second SCI are mapped to the RB shown at 820 in symbol 2 according to the above mapping method, all the modulation symbols corresponding to the second SCI are mapped.
  • mapping process of the modulation symbol corresponding to the second SCI in symbol 2 is based on the RE with the lowest frequency domain position in symbol 2. Mapping starts from the starting position, but since RB0 in symbol 2 is a PSCCH resource, the modulation symbol corresponding to the second SCI is actually mapped from RB1 in symbol 2.
  • the modulation symbols corresponding to the second SCI are not mapped to REs carrying PSCCH, PSSCH DMRS and PTRS.
  • Figure 9 shows a schematic diagram of carrying second SCI sideline transmission resources according to another embodiment of the present application.
  • the RBs in RB set 1 and RB set 2 have an IRB structure, and the RBs in RB set 1 and RB set 2 are divided into comb teeth 0 to comb teeth 4.
  • the number of the comb teeth corresponding to each RB can be Indicated by the numbers within each RB in Figure 9.
  • the terminal equipment selects all RBs in RB set 1 and RBs belonging to comb 2 in RB set 2 as sidelink transmission resources.
  • the RB sets corresponding to PSSCH are RB set 1 and RB set 2, and the RB set corresponding to PSCCH is RB set 1.
  • the modulation symbol corresponding to the second SCI is mapped in the RB set corresponding to the PSSCH (ie, RB set 1 and RB set 2).
  • the resources in symbol 0 are used as AGC, the resources corresponding to symbol 13 are used as GP, and the RBs corresponding to comb 0 in symbols 1 to 3 are PSCCH resources. Then, the modulation symbol corresponding to the second SCI can be mapped within the resources available for transmitting PSSCH in RB set 1.
  • the modulation symbol corresponding to the second SCI can be mapped starting from the RE with the lowest frequency domain position in symbol 1, that is, starting with the RE with the lowest frequency domain position in the RB numbered 0 in symbol 1 as the starting RE, where symbol 1 is the first OFDM symbol carrying PSSCH DMRS. It should be noted that since the RB numbered 0 in symbol 1 is a PSCCH resource, the PSCCH resource needs to be skipped when mapping the modulation symbol corresponding to the second SCI. That is to say, the modulation symbol corresponding to the second SCI is actually Mapping starts from the RB belonging to comb 1 in symbol 1 as the starting RB. In addition, during the mapping process, mapping can be performed in RB set 1 and RB set 2 in a frequency domain first and then time domain manner.
  • the modulation symbol corresponding to the second SCI can be mapped with RE as the granularity during the mapping process, that is, each modulation symbol is mapped to one RE.
  • FIG. 9 only shows the sidelink transmission resources at the RB granularity, and the sidelink transmission resources at the RE granularity are not shown in the figure.
  • the following describes the mapping method of the modulation symbols corresponding to the second SCI in conjunction with Figure 9.
  • the modulation symbol corresponding to the second SCI is mapped from the RE with the lowest frequency domain position in the RB numbered 0 in symbol 1 as the starting RE.
  • RB0 of symbol 1 is PSCCH resources, therefore, the PSCCH resources are skipped in the process of mapping the modulation symbols corresponding to the second SCI. That is to say, the modulation symbols corresponding to the second SCI are actually obtained from the RE with the lowest frequency domain position in RB1 in symbol 1 (see 910) to start mapping.
  • the modulation symbols corresponding to the second SCI are respectively mapped to the REs in symbol 1 in a frequency domain from low to high within symbol 1. If there are no remaining REs in symbol 1 in RB set 1 and RB set 2 that can be used to map the second SCI, at this time, you can continue to start mapping with the RE with the lowest frequency domain position in symbol 2 as the starting RE, and start mapping in RB set 1 and the remaining modulation symbols in symbol 2 in RB set 2 are respectively mapped to the REs in symbol 2 in a frequency domain from low to high. By analogy, until all modulation symbols corresponding to the second SCI are mapped within the PSSCH resources available for transmission. Referring to Figure 9, when the modulation symbols corresponding to the second SCI are mapped to the RB shown at 920 in symbol 2 according to the above mapping method, all the modulation symbols corresponding to the second SCI are mapped.
  • mapping process of the modulation symbol corresponding to the second SCI in symbol 2 is based on the RE with the lowest frequency domain position in symbol 2. Mapping starts from the starting position, but since RB0 in symbol 2 is a PSCCH resource, the modulation symbol corresponding to the second SCI is actually mapped from RB1 in symbol 2.
  • the modulation symbols corresponding to the second SCI are not mapped to REs carrying PSCCH, PSSCH DMRS and phase tracking reference signal (PTRS).
  • the number of modulation symbols corresponding to the second SCI can be calculated based on the formula introduced above.
  • the “RE with the lowest frequency domain position” in the mapping method of the second SCI introduced above in conjunction with Figures 8 and 9 is also the RE with the lowest frequency domain position in the first sidelink transmission resource, or That is, mapping starts from the RE with the lowest frequency domain position within the first sidelink transmission resource.
  • FIG. 10 is a schematic diagram of a terminal device according to an embodiment of the present application.
  • the terminal device 1000 shown in FIG. 10 includes a transceiver unit 1010.
  • the transceiver unit 1010 is configured to receive or send the second sideline control information SCI, where the resources carrying the second SCI are part of the resources in the first sideline transmission resources, and the modulation symbols corresponding to the second SCI are mapped to Within one or more resource block RB sets corresponding to the first sidelink transmission resource.
  • the modulation symbols corresponding to the second SCI are mapped to the one or more RB sets in a frequency domain first and then a time domain manner.
  • the modulation symbols corresponding to the second SCI are mapped in the frequency domain from low to high in the frequency domain.
  • the first sidelink transmission resources also include resources carrying PSSCH DMRS, the starting symbol of the resource carrying PSSCH DMRS is the first symbol, and the modulation symbol corresponding to the second SCI Mapping starts from the first symbol in the time domain, and the resources carrying the second SCI do not overlap with the resources carrying PSSCH DMRS.
  • the first sidelink transmission resources also include PSCCH resources
  • the one or more RB sets are RB sets corresponding to the PSCCH resources
  • the PSCCH resources are related to carrying the third The resources of the two SCIs do not overlap.
  • the first sidelink transmission resources include PSSCH resources, and the one or more RB sets are RB sets corresponding to the PSSCH resources.
  • the one or more RB sets are all RB sets corresponding to the PSSCH resources; or, the one or more RB sets include the lowest frequency domain position corresponding to the PSSCH resources.
  • RB set; or, the one or more RB sets are target RB sets in the RB resources corresponding to the PSSCH resources, where the target RB set is indicated by the first SCI carried in the first sidelink transmission resource. .
  • the first sidelink transmission resource is a transmission resource based on an IRB structure.
  • the first sidelink transmission resource includes a first resource element RE
  • the first RE is an RE determined by the terminal device and can be used to transmit PSSCH
  • the second SCI corresponds to Modulation symbols are mapped to the first RE within the first sidelink transmission resource.
  • the first sidelink transmission resource includes a second RE
  • the second RE is an RE used to carry PTRS
  • the modulation symbol corresponding to the second SCI is not mapped to the first RE.
  • One side row transmits the second RE within the resource.
  • the number of modulation symbols corresponding to the second SCI is determined based on the number of third REs, where the third REs are REs determined by the terminal device for transmitting PSSCH, The third RE is located in the symbol corresponding to the PSCCH and/or PSSCH in the time domain, and the third RE is located in the one or more RB sets in the frequency domain.
  • the first sidelink transmission resource is scheduled by a network device; or the first sidelink transmission resource is selected by the terminal device from a resource pool based on resource listening; or , the first sidelink transmission resource is randomly selected by the terminal device from the resource pool.
  • Figure 11 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the dashed line in Figure 11 indicates that the unit or module is optional.
  • the device 1100 can be used to implement the method described in the above method embodiment.
  • Device 1100 may be a chip, terminal device or network device.
  • Apparatus 1100 may include one or more processors 1110.
  • the processor 1110 can support the device 1100 to implement the method described in the foregoing method embodiments.
  • the processor 1110 may be a general-purpose processor or a special-purpose processor.
  • the processor may be a central processing unit (CPU).
  • the processor can also be another general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), or an off-the-shelf programmable gate array (FPGA) Or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.
  • Apparatus 1100 may also include one or more memories 1120.
  • the memory 1120 stores a program, which can be executed by the processor 1110, so that the processor 1110 executes the method described in the foregoing method embodiment.
  • the memory 1120 may be independent of the processor 1110 or integrated in the processor 1110 .
  • Device 1100 may also include a transceiver 1130.
  • Processor 1110 may communicate with other devices or chips through transceiver 1130.
  • the processor 1110 can transmit and receive data with other devices or chips through the transceiver 1130 .
  • An embodiment of the present application also provides a computer-readable storage medium for storing a program.
  • the computer-readable storage medium can be applied in the terminal or network device provided by the embodiments of the present application, and the program causes the computer to execute the methods performed by the terminal or network device in various embodiments of the present application.
  • An embodiment of the present application also provides a computer program product.
  • the computer program product includes a program.
  • the computer program product can be applied in the terminal or network device provided by the embodiments of the present application, and the program causes the computer to execute the methods performed by the terminal or network device in various embodiments of the present application.
  • An embodiment of the present application also provides a computer program.
  • the computer program can be applied to the terminal or network device provided by the embodiments of the present application, and the computer program causes the computer to execute the methods performed by the terminal or network device in various embodiments of the present application.
  • PB and physical resource block can be used interchangeably.
  • system and “network” are used interchangeably in this application.
  • the terms used in this application are only used to explain specific embodiments of the application and are not intended to limit the application.
  • the terms “first”, “second”, “third” and “fourth” in the description, claims and drawings of this application are used to distinguish different objects, rather than to describe a specific sequence. .
  • the terms “including” and “having” and any variations thereof are intended to cover non-exclusive inclusion.
  • the "instruction" mentioned may be a direct instruction, an indirect instruction, or an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B. relation.
  • B corresponding to A means that B is associated with A, and B can be determined based on A.
  • determining B based on A does not mean determining B only based on A.
  • B can also be determined based on A and/or other information.
  • the term "correspondence” can mean that there is a direct correspondence or indirect correspondence between the two, or it can also mean that there is an associated relationship between the two, or it can also mean indicating and being instructed, configuring and being configured, etc. relation.
  • predefinition or “preconfiguration” can be achieved by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices).
  • devices for example, including terminal devices and network devices.
  • predefined can refer to what is defined in the protocol.
  • the "protocol” may refer to a standard protocol in the communication field, which may include, for example, LTE protocol, NR protocol, and related protocols applied in future communication systems. This application does not limit this.
  • the size of the sequence numbers of the above-mentioned processes does not mean the order of execution.
  • the execution order of each process should be determined by its functions and internal logic, and should not be determined by the implementation process of the embodiments of the present application. constitute any limitation.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can 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 can be integrated into one processing unit, each unit can exist physically alone, or two or more units can be integrated into one unit.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means.
  • the computer-readable storage medium may be any available medium that can be read by a computer or a data storage device such as a server or data center integrated with one or more available media.
  • the available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs (DVD)) or semiconductor media (e.g., solid state disks (SSD) )wait.
  • magnetic media e.g., floppy disks, hard disks, magnetic tapes
  • optical media e.g., digital video discs (DVD)
  • semiconductor media e.g., solid state disks (SSD)

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Abstract

L'invention concerne un procédé et un appareil de communication de liaison latérale. Le procédé comprend : la réception ou l'envoi, par un dispositif terminal de secondes informations de commande de liaison latérale (SCI), une ressource transportant les secondes SCI faisant partie d'une première ressource de transmission de liaison latérale, et un symbole de modulation correspondant aux secondes SCI étant mappé sur un ou plusieurs ensembles de blocs de ressources (RB) correspondant à la première ressource de transmission de liaison latérale. La structure de couche physique d'un spectre sans licence est basée sur l'ensemble de RB et un mécanisme LBT est exécuté à l'aide de l'ensemble de RB en tant que granularité. Par conséquent, dans des modes de réalisation de la présente invention, le mappage de ressources des secondes SCI est exécuté à l'aide de l'ensemble de RB en tant que granularité, c'est-à-dire que le symbole de modulation des secondes SCI peut être mappé sur lesdits un ou plusieurs ensembles de RB correspondant à la première ressource de transmission de liaison latérale, de sorte que le mode de mappage des secondes SCI est mis en correspondance avec la structure de couche physique du spectre sans licence.
PCT/CN2022/087148 2022-04-15 2022-04-15 Procédé et appareil de communication de liaison latérale WO2023197309A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
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