WO2022198640A1 - Procédé de mappage de ressources et appareil de communication - Google Patents

Procédé de mappage de ressources et appareil de communication Download PDF

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Publication number
WO2022198640A1
WO2022198640A1 PCT/CN2021/083292 CN2021083292W WO2022198640A1 WO 2022198640 A1 WO2022198640 A1 WO 2022198640A1 CN 2021083292 W CN2021083292 W CN 2021083292W WO 2022198640 A1 WO2022198640 A1 WO 2022198640A1
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WIPO (PCT)
Prior art keywords
time
positioning reference
reference signal
frequency
resource
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PCT/CN2021/083292
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English (en)
Chinese (zh)
Inventor
郭文婷
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华为技术有限公司
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Priority to PCT/CN2021/083292 priority Critical patent/WO2022198640A1/fr
Publication of WO2022198640A1 publication Critical patent/WO2022198640A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • 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 communication technologies, and in particular, to a resource mapping method and a communication device.
  • the positioning function is an important function of the 5G new radio (NR).
  • the access network device sends configuration information to the terminal device.
  • the configuration information includes information such as the starting time-frequency position of the positioning reference signal.
  • the terminal device determines the time-frequency resource for receiving the positioning reference signal according to the starting time-frequency position of the positioning reference signal.
  • the terminal device receives the positioning reference signal sent by the access network device on the time-frequency resource, and measures the positioning reference signal. Then, the terminal device feeds back the measurement result to the access network device, so that the access network device can locate the terminal device.
  • the terminal device needs to be configured with the starting time-frequency position of the positioning reference signal, resulting in a large signaling overhead.
  • the embodiments of the present application provide a resource mapping method and a communication device, which are used to reduce signaling interaction between an access network device and a terminal device and save signaling overhead.
  • a first aspect of the embodiments of the present application provides a resource mapping method, including:
  • the terminal device determines the first resource according to the port of the first positioning reference signal; the first resource is used to transmit the first positioning reference signal, the first resource is located in a time-frequency unit, and the time-frequency unit includes X positioning reference signal time-frequency resources, X
  • the positioning reference signal time-frequency resources correspond to X positioning reference signal ports respectively, where X is an integer greater than or equal to 2; then, the terminal device transmits the first positioning reference signal on the first resource.
  • the terminal device determines the first resource according to the port of the first positioning reference signal. Then, the terminal device transmits the first positioning reference signal on the first resource. Therefore, it is not necessary for the access network device to configure the starting time-frequency resource for transmitting the positioning reference signal, which reduces signaling interaction between the access network device and the terminal device, and saves signaling overhead.
  • the time-frequency unit may include X positioning reference signal time-frequency resources, and the X positioning reference signal time-frequency resources correspond to the X positioning reference signal ports respectively.
  • the real-time frequency unit can be used for the transmission of X positioning reference signals, and the utilization rate of resources is high.
  • the port of the first positioning reference signal is a port sensed by the terminal device.
  • a specific manner for determining the port of the first positioning reference signal is provided.
  • the terminal device can sense the port of the first positioning reference signal by itself.
  • the method further includes: the terminal device acquires first information, where the first information is used to indicate a port of the first positioning reference signal.
  • This implementation provides another way for the terminal device to determine the port of the first positioning reference signal, which improves the diversity and feasibility of the solution.
  • the X positioning reference signal time-frequency resources include at least two positioning reference signal time-frequency resources, and in the at least two positioning reference signal time-frequency resources, different positioning reference signal ports at the same frequency domain position The corresponding time domain resources satisfy the time division multiplexing relationship.
  • time domain resources corresponding to different positioning reference signal ports on the same frequency domain resource satisfy a time division multiplexing relationship.
  • the terminal devices can send positioning reference signals to each other in different time periods included in the time-frequency unit, thereby avoiding the problem that the terminal devices cannot send and receive positioning reference signals at the same time, and realizing the positioning between the terminal devices.
  • the X positioning reference signal time-frequency resources include at least two positioning reference signal time-frequency resources; in the at least two positioning reference signal time-frequency resources, different positioning reference signal ports on the same time domain symbol The corresponding frequency domain resources satisfy the frequency division multiplexing relationship.
  • the frequency domain resources corresponding to different positioning reference signal ports on the same time domain symbol satisfy a frequency division multiplexing relationship.
  • different terminal devices can transmit positioning reference signals on different frequency domain resources of the time-frequency unit, thereby improving resource utilization. For example, within the same time-domain symbol of a time-frequency unit, different terminal devices may transmit positioning reference signals on different subcarriers.
  • the X positioning reference signal time-frequency resources include at least two resource sets, and in the at least two resource sets, the time domain corresponding to the positioning reference signal ports in different resource sets at the same frequency domain position Time division multiplexing relationship is satisfied between resources.
  • the two terminal devices can transmit the positioning reference signal by using time-frequency resources in different resource sets. Therefore, the problem that the terminal equipment cannot transmit and receive the positioning reference signal at the same time is avoided, and the positioning between the terminal equipments is realized.
  • the X positioning reference signal time-frequency resources include at least two resource sets, and in each resource set in the at least two resource sets, different positioning reference signals in the same resource set on the same time domain symbol
  • the frequency domain resources corresponding to the ports satisfy the frequency division multiplexing relationship.
  • different terminal devices can transmit positioning reference signals on different frequency domain resources included in the same resource set, thereby improving resource utilization. For example, within the same time-domain symbol of a time-frequency unit, different terminal devices may transmit positioning reference signals on different subcarriers.
  • the X positioning reference signal time-frequency resources include M resource sets, the time domain resources included in different resource sets in the M resource sets do not overlap, and the value of M is related to X and a positioning Frequency Domain Density of Reference Signal ok about.
  • the time domain resources included in different resource sets in the M resource sets do not overlap, so that the two terminal devices can use the time-frequency resources in different resource sets to transmit the positioning reference signal. Therefore, the problem that the terminal equipment cannot transmit and receive the positioning reference signal at the same time is avoided, and the positioning between the terminal equipments is realized. And, the size of M and the frequency domain density of X and positioning reference signals are provided related. It is realized that the positioning reference signals between different resource sets in the M resource sets satisfy the frequency division multiplexing relationship, and the time-frequency resources of different positioning reference signals in the same resource set satisfy the frequency division multiplexing relationship, so as to improve the resource utilization rate.
  • each resource set in the M resource sets is used for transmission Positioning reference signals corresponding to the ports, each resource set in the M resource sets includes LPRS time domain symbols, where LPRS is the number of time domain symbols continuously occupied by one positioning reference signal.
  • the above implementation manner shows the relationship between each resource set and the positioning reference signal and the number of time domain symbols included in each resource set.
  • the first initial time domain position is determined according to the first offset, and the first initial frequency domain position is determined according to the second offset;
  • the first offset is the offset of the first starting time domain position relative to the starting time domain position of the time-frequency unit
  • the second offset is the second starting frequency domain position relative to the starting frequency of the time-frequency unit. the offset of the domain position
  • the first starting time domain position is the starting time domain position of the positioning reference signal time-frequency resource corresponding to port i in the X positioning reference signal ports;
  • the first starting frequency domain position is the starting frequency domain position on the time domain symbol 1 of the positioning reference signal time-frequency resource corresponding to port i in the X positioning reference signal ports;
  • the first offset is based on i, the frequency domain density of a positioning reference signal It is determined by the number of time domain symbols L PRS continuously occupied by a positioning reference signal;
  • the second offset is based on i, the frequency domain density of a positioning reference signal and k', which is determined according to l and the first offset.
  • the starting time-frequency position of the positioning reference signal of each port may be determined according to the offset.
  • the access network equipment does not need to configure the starting time-frequency position of the positioning reference signal for the terminal equipment.
  • the signaling interaction between the access network equipment and the terminal equipment is reduced, and signaling overhead is saved.
  • the first offset or, the first offset or, the first offset is the first offset or, the first offset or, the first offset
  • the above implementation manner provides a variety of calculation manners for the first offset, which provides a basis for the implementation of the solution.
  • different calculation methods make the positions of the time domain symbols occupied by the X positioning reference signal ports to be different, which enriches the diversity of the scheme.
  • the first offset is determined according to X, the number of time-domain symbols L PRS continuously occupied by a positioning reference signal, and the number of symbols L sym1 contained in the time-frequency unit.
  • the above implementation manner provides yet another specific calculation method for the position of the first initial time-domain symbol, which improves the diversity and feasibility of the solution.
  • the second offset is % means remainder.
  • the above implementation provides a calculation method for the second offset, which provides a basis for the implementation of the solution.
  • the first offset is In the case of , the signal sent by the terminal device on the signal of the first time domain symbol is a copy of the signal sent by the terminal device on the second time domain symbol; the first time domain symbol is the second time domain symbol in the time-frequency unit The previous time-domain symbol of , and the second time-domain symbol is the first time-domain symbol in the L PRS time-domain symbols included in each resource set in the M resource sets.
  • the signal sent by the terminal device on the previous time domain symbol of the first time domain symbol included in each resource set is a copy of the signal sent by the terminal device on the first time domain symbol included in each resource set.
  • the receiving terminal equipment can reasonably set the receiving power of the receiving terminal equipment according to the power of the positioning reference signal to be transmitted, so as to improve the receiving performance and the network transmission performance.
  • the X positioning reference signal ports are determined according to at least one parameter among the first parameter, the second parameter, and the third parameter;
  • the first parameter is the number of time-domain symbols L syml included in the time-frequency unit, where L syml is an integer greater than or equal to 1;
  • the second parameter is the number of time domain symbols LPRS continuously occupied by a positioning reference signal in the time domain, where LPRS is an integer greater than or equal to 1;
  • the third parameter is the frequency domain density of a positioning reference signal is an integer greater than or equal to 1.
  • a second aspect of the embodiments of the present application provides a method for determining resources, the method comprising:
  • the terminal device obtains the indication information, and the indication information is used to determine the first resource set, and the first resource set is used to send the first positioning reference signal of the terminal device; the first resource set and the second resource set are orthogonal in the frequency domain, and are in the frequency domain. Coincidence in the time domain; the second resource set is used to send a sidelink physical layer feedback channel (physical sidelink feedback channel, PSFCH) carrying sidelink hybrid automatic repeat request information (sidelink hybrid automatic repeat request, SL HARQ); Then, the terminal device determines the first resource set according to the indication information.
  • PSFCH physical sidelink feedback channel
  • sidelink hybrid automatic repeat request information sidelink hybrid automatic repeat request
  • the terminal device can determine the resource used for transmitting the positioning reference signal in the SL system.
  • the first resource set does not additionally occupy resources of sidelink physical layer control information (physical sidelink control channel, PSCCH)
  • the idle resource in the PSFCH time slot is used to send the positioning reference signal to meet the positioning requirement.
  • the method further includes: when the first condition is satisfied, the terminal device transmits the first positioning reference signal on the first resource set;
  • the first condition includes that the ratio between the first difference and the first bandwidth is greater than or equal to a preset threshold; the first difference is the difference between the first physical resource block (physical resource block, PRB) index and the second PRB index value;
  • the first PRB index is the maximum PRB index used for sending the first positioning reference signal within the same time domain symbol indicated by the indication information
  • the second PRB index is the maximum PRB index used for sending the first positioning reference signal within the same time domain symbol indicated by the indication information. minimum PRB index
  • the first bandwidth is the bandwidth of the resource pool where the PSCCH and/or the sidelink physical layer shared channel (physical sidelink share channel, PSSCH) is located, or, the first bandwidth is the number of frequency domain physical resource blocks indicated by the bit length of the indication information .
  • the terminal device uses the first resource set to transmit the first positioning reference signal only when the foregoing first condition is satisfied.
  • the bandwidth requirement of the positioning reference signal can be met.
  • the equivalent bandwidth of the positioning reference signal can be made equal to the bandwidth of the resource pool where the PSCCH and/or the PSSCH are located, thereby obtaining higher positioning accuracy.
  • idle resources are used to send the positioning reference signal to meet the positioning requirement.
  • the indication information is further used to determine the second resource set.
  • the first resource set and the second resource set are indicated by the same indication information, thereby reducing indication signaling overhead.
  • the first resource set includes X positioning reference signal time-frequency resources, where the X positioning reference signal time-frequency resources correspond to the X positioning reference signal ports, and X is an integer greater than or equal to 2.
  • the first resource set can be used for the transmission of X positioning reference signal ports corresponding to X positioning reference signals respectively, and the utilization rate of the resources is relatively high.
  • the X number of positioning reference signal ports are determined according to the frequency domain density of one positioning reference signal.
  • the first resource set includes at least two resource subsets, and in the at least two resource subsets, between frequency domain resources corresponding to positioning reference signal ports in different resource subsets on the same time domain symbol The frequency division multiplexing relationship is satisfied; in at least two resource subsets, the frequency domain resources corresponding to different positioning reference signal ports in the same resource subset on the same time domain symbol satisfy the frequency division multiplexing relationship.
  • different terminal devices may use resources of the same resource subset or resources of different resource subsets to transmit positioning reference signals, which can improve resource utilization.
  • each resource subset in the at least two resource subsets is used for transmission
  • the positioning reference signal of each port Indicates the density of positioning reference signals mapped in the frequency domain within a PRB.
  • a third aspect of an embodiment of the present application provides a communication device, where the communication device includes:
  • a processing module configured to determine a first resource according to the port of the first positioning reference signal, the first resource is used to transmit the first positioning reference signal, the first resource is located in a time-frequency unit, and the time-frequency unit includes X positioning reference signal time-frequency resource, the X positioning reference signal time-frequency resources correspond to the X positioning reference signal ports respectively, and X is an integer greater than or equal to 2;
  • the transceiver module is configured to transmit the first positioning reference signal on the first resource.
  • the port of the first positioning reference signal is a port sensed by the communication device.
  • the transceiver module is also used for:
  • first information where the first information is used to indicate a port of the first positioning reference signal.
  • the X positioning reference signal time-frequency resources include at least two positioning reference signal time-frequency resources, and in the at least two positioning reference signal time-frequency resources, different positioning reference signal ports at the same frequency domain position The corresponding time domain resources satisfy the time division multiplexing relationship.
  • the X positioning reference signal time-frequency resources include at least two positioning reference signal time-frequency resources, and in the at least two positioning reference signal time-frequency resources, different positioning reference signal ports on the same time domain symbol The corresponding frequency domain resources satisfy the frequency division multiplexing relationship.
  • the X positioning reference signal time-frequency resources include at least two resource sets, and in the at least two resource sets, the time domain corresponding to the positioning reference signal ports in different resource sets at the same frequency domain position Time division multiplexing relationship is satisfied between resources.
  • the X positioning reference signal time-frequency resources include at least two resource sets, and in the at least two resource sets, the frequency domain corresponding to different positioning reference signal ports in the same resource set on the same time domain symbol The resources satisfy the frequency division multiplexing relationship.
  • the X positioning reference signal time-frequency resources include M resource sets, the time domain resources included in different resource sets in the M resource sets do not overlap, and the value of M is related to X and a positioning Frequency Domain Density of Reference Signal related.
  • each resource set in the M resource sets is used for transmission Positioning reference signals corresponding to the positioning reference signal ports, each resource set in the M resource sets includes LPRS time domain symbols, and LPRS is the number of time domain symbols continuously occupied by one positioning reference signal.
  • the first initial time domain position is determined according to the first offset, and the first initial frequency domain position is determined according to the second offset;
  • the first offset is the offset of the first starting time domain position relative to the starting time domain position of the time-frequency unit
  • the second offset is the second starting frequency domain position relative to the starting frequency of the time-frequency unit. the offset of the domain position
  • the first starting time domain position is the starting time domain position of the positioning reference signal time-frequency resource corresponding to port i in the X positioning reference signal ports;
  • the first starting frequency domain position is the starting frequency domain position on the time domain symbol 1 of the positioning reference signal time-frequency resource corresponding to port i in the X positioning reference signal ports;
  • i is an integer greater than or equal to 0 and less than or equal to X-1;
  • l is an integer greater than or equal to b and less than or equal to c
  • b is the number of the time-domain symbol where the first starting time-domain position is located
  • c is the sum of the number of time-domain symbols continuously occupied by the positioning reference signal corresponding to port i and b one less;
  • the first offset is based on the i, the frequency domain density of a positioning reference signal It is determined by the number of time domain symbols L PRS continuously occupied by a positioning reference signal;
  • the second offset is based on i, the frequency domain density of a positioning reference signal and k', which is determined according to l and the first offset.
  • the first offset is determined according to X, the number of time-domain symbols L PRS continuously occupied by a positioning reference signal, and the number of symbols L sym1 contained in the time-frequency unit.
  • the second offset is % means remainder.
  • the first offset is In the case of , the signal sent by the communication device on the signal of the first time domain symbol is a copy of the signal sent by the communication device on the second time domain symbol;
  • the first time-domain symbol is the previous time-domain symbol of the second time-domain symbol in the time-frequency unit
  • the second time-domain symbol is the first time-domain symbol in the L PRS time-domain symbols included in each resource set in the M resource sets. Domain notation.
  • the X positioning reference signal ports are determined according to at least one parameter among the first parameter, the second parameter, and the third parameter;
  • the first parameter is the number of time-domain symbols L syml included in the time-frequency unit, where L syml is an integer greater than or equal to 1;
  • the second parameter is the number of time domain symbols LPRS continuously occupied by a positioning reference signal in the time domain, where LPRS is an integer greater than or equal to 1;
  • the third parameter is the frequency domain density of a positioning reference signal is an integer greater than or equal to 1.
  • a fourth aspect of an embodiment of the present application provides a communication device, where the communication device includes:
  • a transceiver module configured to obtain indication information, where the indication information is used to determine a first resource set, and the first resource set is used to send a first positioning reference signal of the communication device; the first resource set and the second resource set are orthogonal in the frequency domain , and overlap in the time domain; the second resource set is used to send the PSFCH bearing SL HARQ;
  • the processing module is configured to determine the first resource set according to the indication information.
  • the transceiver module is also used for:
  • the first condition includes that the ratio between the first difference and the first bandwidth is greater than or equal to a preset threshold
  • the first difference is the difference between the PRB index and the second PRB index
  • the first PRB index is the maximum PRB index used for sending the first positioning reference signal in the same time domain symbol indicated by the indication information
  • the second PRB index is the minimum PRB index used for sending the first positioning reference signal in the same time domain symbol indicated by the indication information
  • the first bandwidth is the bandwidth of the resource pool where the PSCCH and/or PSSCH are located, or,
  • the first bandwidth is the number of frequency domain physical resource blocks indicated by the bit length of the indication information.
  • the indication information is further used to determine the second resource set.
  • the first resource set includes X positioning reference signal time-frequency resources, where the X positioning reference signal time-frequency resources correspond to the X positioning reference signal ports, and X is an integer greater than or equal to 2.
  • the X number of positioning reference signal ports are determined according to the frequency domain density of one positioning reference signal.
  • the first resource set includes at least two resource subsets, and in the at least two resource subsets, between frequency domain resources corresponding to positioning reference signal ports in different resource subsets on the same time domain symbol To meet the frequency division multiplexing relationship;
  • frequency-domain resources corresponding to different positioning reference signal ports in the same resource subset on the same time-domain symbol satisfy a frequency-division multiplexing relationship.
  • each resource subset in the at least two resource subsets is used for transmission
  • the positioning reference signal of each port Indicates the mapping density of a positioning reference signal in the frequency domain within a PRB.
  • a fifth aspect of an embodiment of the present application provides a communication device, where the communication device includes: a processor and a memory.
  • a computer program is stored in the memory; the processor is used for calling and running the computer program stored in the memory, so that the processor implements any one of the implementation manners in the first aspect.
  • the communication device further includes a transceiver; the processor is further configured to control the transceiver to send and receive signals.
  • a sixth aspect of an embodiment of the present application provides a communication device, where the communication device includes: a processor and a memory.
  • a computer program is stored in the memory; the processor is used to call and run the computer program stored in the memory, so that the processor implements any one of the implementation manners in the second aspect.
  • the communication device further includes a transceiver; the processor is further configured to control the transceiver to send and receive signals.
  • a seventh aspect of the embodiments of the present application provides a computer program product including instructions, which is characterized in that, when it runs on a computer, the computer is caused to execute any one of the implementations of the first aspect to the second aspect.
  • An eighth aspect of the embodiments of the present application provides a computer-readable storage medium, including computer instructions, which, when the computer instructions are executed on a computer, cause the computer to execute any one of the implementation manners of the first aspect to the second aspect.
  • a ninth aspect of an embodiment of the present application provides a chip device, including a processor that is connected to a memory and calls a program stored in the memory, so that the processor executes any one of the first to second aspects above Method to realize.
  • the terminal device determines the first resource according to the port of the first positioning reference signal. Then, the terminal device transmits the first positioning reference signal on the first resource. Therefore, it is not necessary for the access network device to configure the starting time-frequency resource for transmitting the positioning reference signal, which reduces signaling interaction between the access network device and the terminal device, and saves signaling overhead.
  • FIG. 1A is a schematic diagram of a communication system according to an embodiment of the present application.
  • FIG. 1B is another schematic diagram of a communication system according to an embodiment of the present application.
  • FIG. 2A is a schematic diagram of an embodiment of a resource mapping method according to an embodiment of the present application.
  • 2B is a schematic diagram of an angle measurement provided by an embodiment of the present application.
  • FIG. 2C is a schematic diagram of a position measurement process between terminal devices according to an embodiment of the present application.
  • 3A is a schematic diagram of a mapping of a resource mapping method according to an embodiment of the present application.
  • FIG. 3B is another mapping schematic diagram of a resource mapping method according to an embodiment of the present application.
  • FIG. 3C is another schematic diagram of mapping of a resource mapping method according to an embodiment of the present application.
  • FIG. 3D is another mapping schematic diagram of a resource mapping method according to an embodiment of the present application.
  • FIG. 3E is another mapping schematic diagram of a resource mapping method according to an embodiment of the present application.
  • FIG. 3F is another mapping schematic diagram of a resource mapping method according to an embodiment of the present application.
  • FIG. 3G is another mapping schematic diagram of a resource mapping method according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of another embodiment of a resource mapping method according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another embodiment of a resource mapping method according to an embodiment of the present application.
  • FIG. 6A is another mapping schematic diagram of a resource mapping method according to an embodiment of the present application.
  • FIG. 6B is another mapping schematic diagram of a resource mapping method according to an embodiment of the present application.
  • FIG. 6C is another mapping schematic diagram of a resource mapping method according to an embodiment of the present application.
  • 6D is a schematic diagram of a PRB and a logical RB according to an embodiment of the present application.
  • FIG. 6E is another mapping schematic diagram of a resource mapping method according to an embodiment of the present application.
  • FIG. 6F is another mapping schematic diagram of a resource mapping method according to an embodiment of the present application.
  • FIG. 6G is another mapping schematic diagram of a resource mapping method according to an embodiment of the present application.
  • FIG. 6H is another schematic diagram of mapping of a resource mapping method according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 8 is another schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • references in this specification to "one embodiment” or “some embodiments” and the like mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application.
  • appearances of the phrases “in one embodiment,” “in some embodiments,” “in other embodiments,” “in other embodiments,” etc. in various places in this specification are not necessarily All refer to the same embodiment, but mean “one or more but not all embodiments” unless specifically emphasized otherwise.
  • the terms “including”, “including”, “having” and their variants mean “including but not limited to” unless specifically emphasized otherwise.
  • At least one means one or more, and “plurality” means two or more.
  • "At least one item(s) below” or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s).
  • at least one (a) of a, b, or c may represent: a, b, c, ab, ac, bc, or abc.
  • a, b, c can be single or multiple. In this application, Refers to the rounding down of x.
  • OFDM Orthogonal frequency division multiplexing
  • SC-FDMA single-carrier frequency-division multiple access
  • V2X vehicle to everything
  • the V2X scenario may be any of the following systems: vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), vehicle-to-network (V2N) service and vehicle-to-infrastructure communication (V2I), etc.
  • V2V vehicle-to-vehicle
  • V2P vehicle-to-pedestrian
  • V2N vehicle-to-network
  • V2I vehicle-to-infrastructure communication
  • D2D may be long term evolution (LTE) D2D, new radio (NR) D2D, and may also be D2D in other communication systems that may appear with the development of technology.
  • V2X can be LTE V2X, NR V2X, or V2X in other communication systems that may appear with the development of technology.
  • the terminal device in this embodiment of the present application may be a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or user device.
  • the terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, roadside units (RSUs), end devices in future 5G networks, or future evolution of public land mobile communications
  • a terminal device in a network public land mobile network, PLMN), etc., is not limited in this embodiment of the present application.
  • the access network device in this embodiment of the present application may be a base station (base station), an evolved NodeB (eNodeB), a transmission reception point (TRP), and a next-generation base station (next generation) in a 5G mobile communication system.
  • generation NodeB, gNB generation NodeB, gNB
  • base stations in future mobile communication systems or access nodes in wireless fidelity (WiFi) systems, etc.
  • the access network equipment can also be a module or unit that completes some functions of the base station.
  • the access network device may be a centralized unit (central unit, CU) or a distributed unit (distributed unit, DU).
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the access network device.
  • FIG. 1A is a schematic diagram of a communication system according to an embodiment of the present application.
  • the V2X UE1 and the V2X UE2 communicate through the access network device; or, the V2X UE1 and the V2X UE2 communicate through the proximity communication 5 (prose communication 5, PC5) interface.
  • the direct link between V2X UE1 and V2X UE2 is called a sidelink or sidelink (SL).
  • a sidelink positioning reference signal can be transmitted between the V2X UE1 and the V2X UE2 to realize the positioning between the V2X UE1 and the V2X UE2.
  • V2X UE1 sends SL-PRS to V2X UE2, V2X UE2 measures the SL-PRS, obtains the measurement result, and determines the location of V2X UE2 based on the measurement result.
  • V2X UE2 can also send SL-PRS to V2X UE1, V2X UE1 measures the SL-PRS, obtains the measurement result, and determines the location of V2X UE2 based on the measurement result.
  • a common set of SL-PRS resources can be configured.
  • the set of SL-PRS resources may also be referred to as a pool of SL-PRS resources.
  • the terminal equipment in the SL system selects corresponding resources in the SL-PRS resource pool to transmit the SL-PRS.
  • the access network device may configure the SL-PRS resource pool for the SL system. Specifically, the access network device may notify the terminal device of the configuration information of the SL-PRS resource pool through radio resource control (radio resource control, RRC) signaling. For example, the location of the time-frequency resources included in the SL-PRS resource pool.
  • radio resource control radio resource control
  • FIG. 1B is another schematic diagram of a communication system according to an embodiment of the present application.
  • the communication between V2X UE1 and V2X UE2 is carried out through the PC5 interface.
  • the direct link between V2X UE1 and V2X UE2 is called a sidelink or sidelink (SL).
  • SL-PRS can be transmitted between V2X UE1 and V2X UE2 to realize positioning between V2X UE1 and V2X UE2.
  • a common SL-PRS set may be configured on the SL link, and the SL-PRS set may also be referred to as an SL-PRS resource pool.
  • the terminal equipment of the SL system selects corresponding resources in the SL PRS resource pool to transmit SL-PRS. Since V2X UE2 is not within the signal coverage of the access network equipment, the configuration information of the SL-PRS resource pool can be pre-configured on V2X UE1 and V2X UE2.
  • the configuration information of the SL-PRS resource pool includes the location of the time-frequency resources included in the SL-PRS resource pool.
  • the configuration information of the SL-PRS resource pool may be configured when V2X UE1 and V2X UE2 leave the factory.
  • FIG. 2A is a schematic diagram of an embodiment of a resource determination method according to an embodiment of the present application.
  • the resource determination method includes:
  • the terminal device determines the first resource in the time-frequency unit according to the port of the first positioning reference signal.
  • the first resource is located in the time-frequency unit, and the first resource is used for transmitting the first positioning reference signal.
  • the time-frequency unit includes X positioning reference signal time-frequency resources, the X positioning reference signal time-frequency resources correspond to the X positioning reference signal ports, and X is an integer greater than or equal to 1.
  • the set of SL-PRS resources may also be referred to as a pool of SL-PRS resources.
  • the SL-PRS resource pool includes time-frequency resources for transmitting SL PRS.
  • the SL-PRS resource pool includes one or more SL slots, and one or more PRBs.
  • the frequency domain bandwidth of the SL-PRS resource pool is Y, and Y is greater than 0.
  • the frequency domain bandwidth of the SL-PRS resource pool may be configured by a network device or defined by a communication standard protocol, which is not specifically limited in this application.
  • the frequency domain bandwidth of the SL-PRS resource pool may be configured by the base station.
  • the frequency domain bandwidth of the SL-PRS resource pool may be predefined. SL-PRS can occupy the entire frequency domain bandwidth of the SL-PRS resource pool.
  • At least two positioning reference signal time-frequency resources corresponding to frequency domain resources on the same time domain symbol can satisfy the frequency division multiplexing relationship. That is, in the overlapping positioning reference signal time-frequency resources in the time domain, the frequency domain resources corresponding to different positioning reference signal ports on the same time domain symbol satisfy the frequency division multiplexing relationship.
  • time-domain resources corresponding to at least two positioning reference signal time-frequency resources at the same frequency-domain location may satisfy time-division multiplexing.
  • the time-domain symbols included in each positioning reference signal time-frequency resource are continuous.
  • the frequency domain densities of the positioning reference signals corresponding to the X positioning reference signal ports respectively are the same.
  • the time domain start symbols occupied by each positioning reference signal time-frequency resource are the same, and the time domain symbols occupied by each positioning reference signal time-frequency resource are the same.
  • X positioning reference signal ports correspond to X positioning reference signals.
  • Positioning reference signals that completely overlap in the time domain among the X positioning reference signals may belong to one PRS group.
  • the configuration parameters of the positioning reference signals of the same PRS group are the same.
  • Configuration parameters include the number of time-domain symbols and frequency-domain density continuously occupied by the positioning reference signal.
  • the configuration parameters of the positioning reference signals of different PRS groups may be the same or different.
  • the network device may configure the number of consecutive time-domain symbols and frequency-domain density occupied by the positioning reference signal for the SLPRS resource set through signaling (for example, RRC signaling).
  • the network device configures the number of occupied consecutive time-domain symbols and the frequency-domain density for positioning reference signals of different PRS groups through signaling.
  • the frequency domain density of the PRS refers to the density of the PRS mapped in the frequency domain. For example, in the frequency domain bandwidth of the SL-PRS resource pool, every P resource element (resource element, RE) has one RE for mapping the positioning reference signal, it can be understood that the frequency domain of the positioning reference signal
  • the density is P, where P is an integer greater than or equal to 1.
  • the frequency domain density of the PRS may also be referred to as the distribution density of the frequency domain resources included in a PRS time-frequency resource in the frequency domain.
  • this embodiment can also be applied to configure multiple public SL-PRS resource sets for the user equipment in the SL system, that is, multiple SL-PRS resource pools.
  • the specific network device can configure the starting time domain symbol of the SL-PRS resource set for each SL-PRS resource set through signaling (for example, RRC signaling), the number of consecutive time domain symbols occupied by SL-PRS respectively, the frequency domain density and other parameters.
  • the configuration parameters of the SL-PRS transmitted in different SL-PRS resource sets are the same or different.
  • the SL-PRSs in the same SL-PRS set respectively occupy the same number of time domain symbols continuously, and the SL-PRSs in the same SL-PRS set respectively correspond to the same frequency domain density.
  • the time-domain resources of the time-frequency unit may include all or part of the time-domain symbols configured in the SL system for transmitting positioning reference signals.
  • the time-domain resource of the time-frequency unit is located in one SL time slot as an example for description.
  • the frequency domain resources of the time-frequency unit may include all or part of PRBs configured in the SL system for transmitting positioning reference signals.
  • the time-frequency unit includes X positioning reference signal time-frequency resources, and the X positioning reference signal time-frequency resources correspond to the X positioning reference signal ports respectively.
  • the initial time-domain symbol occupied by the time-frequency unit is time-domain symbol 0, the time-frequency unit occupies 14 consecutive time-domain symbols, and the frequency domain occupies M PRBs, where M is an integer greater than or equal to 1.
  • M is an integer greater than or equal to 1.
  • One PRB includes 12 consecutive subcarriers. Its pattern on one PRB is shown in Figure 3A, the time-frequency unit includes 12 positioning reference signal time-frequency resources, that is, X is equal to 12.
  • the 12 positioning reference signal time-frequency resources correspond to 12 positioning reference signal ports respectively. That is, each positioning reference signal port corresponds to one positioning reference signal, and 12 positioning reference signals are respectively transmitted on the positioning reference signal time-frequency resources corresponding to the 12 positioning reference signal ports.
  • the X positioning reference signal ports may be pre-configured; or, the X positioning reference signal ports are determined according to at least one of the first parameter, the second parameter, and the third parameter.
  • the first parameter is the number of time-domain symbols L syml included in the time-frequency unit, where L syml is an integer greater than or equal to 1.
  • the second parameter is the number of time domain symbols LPRS continuously occupied by a positioning reference signal in the time domain, where LPRS is an integer greater than or equal to 1.
  • the third parameter is the frequency domain density of a positioning reference signal is an integer greater than or equal to 1.
  • This embodiment is described by taking as an example that the terminal device determines the first resource for transmitting the first positioning reference signal in the time-frequency unit.
  • the process for the terminal equipment to map the first positioning reference signal on other time-frequency resources in the SLPRS resource pool is similar to the process in this embodiment, and details are not repeated in this application.
  • the first positioning reference signal is one of X positioning reference signals.
  • the terminal device is a sending terminal device or a receiving terminal device, which is not specifically limited in this application.
  • the following describes a specific implementation manner in which the terminal device determines the port of the first positioning reference signal in this embodiment.
  • the first terminal device determines the port of the first positioning reference signal by sensing.
  • the first terminal device sends the first information to the second terminal device.
  • the first terminal device is a sending terminal device
  • the second terminal device is a receiving terminal device.
  • the first information is used to indicate the time-frequency domain resource location of the first positioning reference signal.
  • the first information includes time slot location information of the time-frequency unit where the first positioning reference signal is located, and/or port number indication information of a port of the first positioning reference signal.
  • the first terminal device may perceive and determine the port of the first positioning reference signal through the following two possible implementation manners, which will be described separately below.
  • Implementation mode 1 The first terminal device determines a sidelink physical layer shared information (physical sidelink share channel) resource. Then, the first terminal device determines a time-frequency resource for sending the first positioning reference signal and a port for the first positioning reference signal according to the mapping relationship and the PSSCH resource.
  • a sidelink physical layer shared information physical sidelink share channel
  • the mapping relationship includes the mapping relationship between the positioning reference signal time-frequency resources and the subchannels in the resource pool.
  • PSSCH resources occupy at least one subchannel continuously.
  • the first terminal device determines the positioning reference signal time-frequency resource corresponding to the at least one subchannel and the port corresponding to the positioning reference signal time-frequency resource according to the mapping relationship. Then, the first terminal device uses the positioning reference signal time-frequency resource as a time-frequency resource for sending the first positioning reference signal. The first terminal device uses the port corresponding to the positioning reference signal time-frequency resource as the port corresponding to the first positioning reference signal.
  • Implementation mode 2 The first terminal device excludes the unavailable resources in the target resources to determine the remaining available resources.
  • the target resource is a resource configured by the SL system for transmitting positioning reference signals.
  • the first terminal device selects a time-frequency resource for sending the first positioning reference signal from the remaining available resources, and determines the time slot where the time-frequency resource of the first positioning reference signal is located and the time-frequency resource corresponding to the first positioning reference signal port.
  • the second terminal device obtains the first information, and determines the port of the first positioning reference signal according to the first information.
  • the second terminal device is a receiving terminal device, and the first information is used to indicate the port of the first positioning reference signal.
  • the first terminal device sends the first information of the terminal device is sent by the first terminal device to the second terminal device; or, the first information is pre-configured by the SL system, which is not specifically limited in this application.
  • the specific implementation manner of sending the first information to the second terminal device through the first terminal device is shown in the following by using the embodiment shown in FIG. 4 , which will not be described in detail here.
  • the terminal device determines the starting time-frequency resource position of the first positioning reference signal in the time-frequency unit according to the port number of the first positioning reference signal. Then, the terminal device determines the time-frequency resource in the time-frequency unit for transmitting the first positioning reference signal according to the starting time-frequency position of the first positioning reference signal.
  • the starting time-frequency position of the first positioning reference signal includes: the starting time domain position of the first positioning reference signal and the starting frequency domain position of the first positioning reference signal.
  • the starting time-frequency position of the first positioning reference signal please refer to the related introduction later.
  • the terminal device determines the time domain position in the time-frequency unit for transmitting the first positioning reference signal by using the starting time domain position of the first positioning reference signal and the following formula 1.
  • the terminal device determines the frequency domain position in the time-frequency unit for transmitting the first positioning reference signal by using the starting frequency domain position of the first positioning reference signal and the following formula 2.
  • l represents the time domain symbol index on one SL slot.
  • k represents the frequency domain subcarrier index on the transmission bandwidth of the first positioning reference signal.
  • L PRS is the number of time domain symbols continuously occupied by the first positioning reference signal. For example, L PRS ⁇ ⁇ 2, 4, 6, 12 ⁇ .
  • the port of the first positioning reference signal is port 1 .
  • the first positioning reference signal may be referred to as a positioning reference signal corresponding to port 1 .
  • the first resource includes the time-frequency resource of the positioning reference signal of port 1 .
  • the terminal device transmits the first positioning reference signal on the first resource.
  • the transmitting of the first positioning reference signal by the terminal device on the first resource includes: the terminal device receiving or sending the first positioning reference signal on the first resource.
  • an SL connection is established between V2X UE1 and V2X UE2. If the terminal device is the V2X UE1, the V2X UE1 sends the first positioning reference signal to the V2X UE2 on the first resource. Then the V2X UE2 can measure the first positioning reference signal, and determine the position of the V2X UE1 according to the measurement result obtained by the measurement. For example, the measurement results include angle information.
  • the antenna A is the antenna A on the front of the car 1 , and A sends the first positioning reference signal through the antenna.
  • the antenna B and the antenna BC are two antennas on the left and right sides of the front of the car 2 .
  • the car 1 sends the first positioning reference signal through the antenna A.
  • the car 1 calculates the arrival angle ⁇ of the first positioning reference signal received by the antenna B of the car 2 and the arrival angle ⁇ of the first positioning reference signal received by the antenna C, respectively.
  • the angle of arrival is defined here as the angle between the main signal path of the first positioning reference signal and the BC direction, and the BC direction refers to the direction from B to C.
  • the car 1 calculates the difference ⁇ between the arrival angle ⁇ and the arrival angle ⁇ . Under the condition that the side length of BC is known, the car 1 can calculate the vertical distance d between A and BC side. That is, the distance from car 1 to car 2 is obtained.
  • the V2X UE2 receives the first positioning reference signal sent by the V2X UE1 on the first resource. Then the V2X UE1 can measure the first positioning reference signal, and determine the position of the V2X UE2 according to the measurement result obtained by the measurement.
  • V2X UE1 and V2X UE2 measure the distance information between V2X UE1 and V2X UE2 based on the method of measuring the transmission delay difference of the positioning reference signal, the process is shown in Figure 2C, and both V2X UE1 and V2X UE2 must send positioning signals. If the V2X UE1 is the sending terminal device, the V2X UE1 sends the first positioning reference signal S0 to the V2X UE2 on the first resource, and records the sending time t1 of the S0. Then the V2X UE2 receives the first positioning reference signal S0, and records the reception time t2 of the S0 signal.
  • the V2X UE2 If the V2X UE2 is the transmitting terminal device, the V2X UE2 receives the first positioning reference signal S1 sent by the V2X UE1 on the first resource, and records the sending time t3 of the S1.
  • the corresponding V2X UE1 is a receiving terminal device, and the V2X UE1 receives the positioning reference signal S1 and records the reception time t4 of S1.
  • the V2X UE2 sends the difference t2-t3 between the reception time of the positioning reference signal S0 and the transmission time of the positioning reference signal S1 to the V2X UE1, so as to determine the distance between the V2X UE1 and the V2X UE2. Then V2X UE1 can obtain the round trip time difference (round trip time, RTT) of the radio wave signal between V2X UE1 and V2X UE2 according to the time information t4-t1+(t2-t3), so as to determine the distance between V2X UE1 and V2X UE2 .
  • round trip time, RTT round trip time
  • the V2X UE2 sends the difference t3-t2 between the reception time of the positioning reference signal S1 and the transmission time set as the reference signal S0 to the V2X UE1 for determining the distance between the V2X UE1 and the V2X UE2. Then V2X UE1 can obtain the round-trip propagation time difference RTT of the radio wave signal between UE1 and UE2 according to the time information t4-t1-(t3-t2), so as to determine the distance between V2X UE1 and V2X UE2 as RTT/2*c, c is the speed of light.
  • the above measured arrival time of the received positioning reference signal may be the first path arrival time of the received positioning reference signal.
  • the terminal device may determine the first resource for transmitting the first positioning reference signal in the time-frequency unit according to the port of the first positioning reference signal, and transmit the first positioning reference signal on the first resource.
  • the first resource can be determined without the access network device configuring the starting time-frequency resource for transmitting the first positioning reference signal, which reduces signaling interaction between the access network device and the terminal device and saves signaling overhead.
  • the time-frequency unit may include X positioning reference signal time-frequency resources, where the X positioning reference signal time-frequency resources correspond to the X positioning reference signal ports respectively.
  • the real-time frequency unit can be used for the transmission of X positioning reference signals corresponding to the X positioning reference signal ports, and the utilization rate of resources is relatively high.
  • the X positioning reference signal time-frequency resources include at least two positioning reference signal time-frequency resources.
  • time-domain resources corresponding to different positioning reference signal ports at the same frequency-domain position satisfy a time-division multiplexing relationship.
  • the initial time-domain symbol occupied by the time-frequency unit is time-domain symbol 0
  • the time-frequency unit occupies 14 consecutive time-domain symbols
  • the frequency domain occupies M PRBs, where M is an integer greater than or equal to 1.
  • M is an integer greater than or equal to 1.
  • One PRB includes 12 consecutive subcarriers. Its pattern on one PRB is shown in Figure 3A.
  • the time-frequency unit includes 12 positioning reference signal time-frequency resources, and the 12 positioning reference signal time-frequency resources correspond to the 12 positioning reference signal ports respectively.
  • the 12 positioning reference signal ports are respectively used for sending corresponding positioning reference signals.
  • the positioning reference signal time-frequency resources of port 1 occupy time domain symbols 0 to 3 in the SL time slot in the time domain.
  • the positioning reference signal time-frequency resources of port 4 occupy time domain symbols 4 to 7 on the SL time slot in the time domain.
  • the positioning reference signal time-frequency resources of port 1 occupy subcarrier 1, subcarrier 5, and subcarrier 9 in the PRB.
  • the time-frequency resources of the positioning reference signal of port 4 occupy subcarrier 1, subcarrier 5, and subcarrier 9 in the PRB.
  • subcarrier 1 the time-domain resources occupied by the positioning reference signal time-frequency resources on port 1 and the time-domain resources occupied by the positioning reference signal time-frequency resources on port 4 satisfy a time-division multiplexing relationship.
  • sub-carrier 5 and sub-carrier 9 are also similar, and will not be described one by one here.
  • positioning is performed between terminal devices.
  • an SL connection is established between V2X UE1 and V2X UE2, and positioning is performed between V2X UE1 and V2X UE2 to determine the geographic location of both parties.
  • time-domain resources corresponding to different positioning reference signal ports at the same frequency-domain position satisfy a time-division multiplexing relationship.
  • the terminal devices can send positioning reference signals to each other in different time periods included in the time-frequency unit, thereby avoiding the problem that the terminal devices cannot send and receive positioning reference signals at the same time, and realizing the positioning between the terminal devices.
  • the X positioning reference signal time-frequency resources include at least two positioning reference signal time-frequency resources.
  • the frequency domain resources corresponding to different positioning reference signal ports satisfy a frequency division multiplexing relationship.
  • the initial time-domain symbol occupied by the time-frequency unit is time-domain symbol 0
  • the time-frequency unit occupies 14 consecutive time-domain symbols
  • the frequency domain occupies M PRBs, where M is an integer greater than or equal to 1.
  • M is an integer greater than or equal to 1.
  • One PRB includes 12 consecutive subcarriers. Its pattern on one PRB is shown in Figure 3A.
  • the time-frequency unit includes 12 positioning reference signal time-frequency resources, and the 12 positioning reference signal time-frequency resources correspond to 12 defined reference signal ports respectively.
  • the 12 positioning reference signal ports are respectively used for sending corresponding positioning reference signals.
  • the positioning reference signal time-frequency resources of port 0 when the positioning reference signal time-frequency resources of port 0, the positioning reference signal time-frequency resources of port 1, the positioning reference signal time-frequency resources of port 2, and the positioning reference signal time-frequency resources of port 3 are all occupied respectively Domain Symbol 0 to Time Domain Symbol 3. That is, the time-domain symbols occupied by the positioning reference signal time-frequency resources of port 0, the positioning reference signal time-frequency resources of port 1, the positioning reference signal time-frequency resources of port 2, and the positioning reference signal time-frequency resources of port 3 respectively overlap.
  • the frequency domain resources corresponding to port 0, the frequency domain resources corresponding to port 1, the frequency domain resources corresponding to port 2, and the frequency domain resources corresponding to port 3 are respectively divided into 12 subcarriers included in the PRB. That is to say, on the time domain symbol 0, the frequency domain resources corresponding to port 0, the frequency domain resources corresponding to port 1, the frequency domain resources corresponding to port 2, and the frequency domain resources corresponding to port 3 satisfy the frequency division multiplexing relationship. . The same is true for time-domain symbol 1, time-domain symbol 2, and time-domain symbol 3, which will not be described one by one here.
  • the frequency domain resources corresponding to different positioning reference signal ports satisfy a frequency division multiplexing relationship.
  • different terminal devices in the SL system can transmit positioning reference signals on different subcarriers, thereby improving resource utilization.
  • the X positioning reference signal time-frequency resources belong to at least two resource sets.
  • a time-division multiplexing relationship is satisfied between time-domain resources occupied by positioning reference signal ports in different resource sets at the same frequency-domain location.
  • a frequency-division multiplexing relationship is satisfied between frequency-domain resources occupied by different positioning reference signal ports in the same resource set on the same time-domain symbol.
  • the X positioning reference signal time-frequency resources are divided into three resource sets, which are resource set 1, resource set 2, and resource set 3, respectively.
  • Resource set 1 occupies time domain symbol 0 to time domain symbol 3 of the time-frequency unit.
  • the resource set 2 occupies time domain symbols 4 to 7 of the time-frequency unit.
  • the resource set 3 occupies time domain symbols 8 to 11 of the time-frequency unit.
  • the time domain resources respectively included in the three resource sets do not overlap, and the frequency domain resources included in the three resource sets respectively overlap.
  • the positioning reference signal time-frequency resources of port 1 are located in resource set 1, and the positioning reference signal time-frequency resources of port 5 are located in resource set 2.
  • the time domain resource occupied by the positioning reference signal time-frequency resource of port 1 is time domain symbol 0
  • the time domain resource occupied by the positioning reference signal time-frequency resource of port 5 is time domain symbol 4. Therefore, it can be known that on subcarrier 0, the time domain resources occupied by the positioning reference signal time-frequency resources of port 1 and the time domain resources occupied by the positioning reference signal time-frequency resources of port 5 satisfy the time division multiplexing relationship.
  • the time domain resources occupied by different positioning reference signals in the same resource set overlap, and the frequency domain resources of different positioning reference signals in the same resource set satisfy a frequency division multiplexing relationship. That is, the subcarriers of different positioning reference signals in the same time domain symbol are different.
  • the resource set 1 includes the positioning reference signal time-frequency resources of port 0 and the positioning reference signal time-frequency resources of port 1 .
  • the positioning reference signal time-frequency resources of port 0 and the positioning reference signal time-frequency resources of port 1 both occupy time domain symbols 0 to 3 of the SL time slot.
  • the time-frequency resources of the positioning reference signal of port 0 and the time-frequency resources of the positioning reference signal of port 1 respectively occupy different subcarriers in the same time domain symbol.
  • the frequency domain resources occupied by the positioning reference signal time-frequency resources of port 0 are subcarrier 0, subcarrier 4, and subcarrier 8, and the frequency domain resources occupied by the positioning reference signal time-frequency resources of port 1 are subcarrier 1, subcarrier 5, and subcarrier 9. It can be seen that on time domain symbol 0, the frequency domain resources occupied by the positioning reference signal time-frequency resources of port 0 and the frequency domain resources occupied by the positioning reference signal time-frequency resources of port 1 satisfy the frequency division multiplexing relationship.
  • the X positioning reference signal time-frequency resources belong to at least two resource sets, and in the at least two resource sets, the time domain occupied by the positioning reference signal ports in different resource sets at the same frequency domain position Time division multiplexing relationship is satisfied between resources.
  • the two terminal devices can transmit the positioning reference signal by using time-frequency resources in different resource sets. Therefore, the problem that the terminal equipment cannot transmit and receive the positioning reference signal at the same time is avoided, and the positioning between the terminal equipments is realized.
  • the X positioning reference signal time-frequency resources belong to at least two resource sets.
  • frequency-division multiplexing is satisfied between the frequency-domain resources occupied by different positioning reference signal ports in the same resource set on the same time-domain symbol. relation.
  • different terminal devices in the SL system can transmit positioning reference signals on different subcarriers on the same time domain symbol, thereby improving resource utilization.
  • the X positioning reference signal time-frequency resources belong to M resource sets, and the time domain resources included in different resource sets in the M resource sets do not overlap.
  • the X positioning reference signal ports are determined according to at least one parameter among the first parameter, the second parameter and the third parameter.
  • M is the frequency domain density according to X and the positioning reference signal definite.
  • M can also be determined according to at least one of the first parameter, the second parameter, and the third parameter, and then M and the frequency domain density of a positioning reference signal can be determined.
  • X positioning reference signal ports are determined.
  • the first starting time domain position is determined according to the first offset
  • the first starting frequency domain position is determined according to the second offset The displacement is determined.
  • the first starting time domain position is the starting time domain position of the positioning reference signal time-frequency resource corresponding to port i among the X positioning reference signal ports.
  • the first starting frequency domain position is the starting frequency domain position on the time domain symbol 1 of the positioning reference signal time-frequency resource corresponding to port i among the X positioning reference signal ports.
  • i is an integer greater than or equal to 0 and less than or equal to X-1.
  • l is an integer greater than or equal to b and less than or equal to c, b is the number of the time domain symbol where the first starting time domain position is located, c is the number of time domain symbols continuously occupied by the positioning reference signal corresponding to port i L PRS and b The sum is one less.
  • the first offset is the offset of the first starting time domain position relative to the starting time domain position of the time-frequency unit.
  • the second offset is the offset of the first starting frequency domain position relative to the starting time domain position of the time-frequency unit.
  • the first offset is based on i, the frequency domain density of a positioning reference signal It is determined by the number of time domain symbols L PRS continuously occupied by a positioning reference signal.
  • the second offset is based on i, the frequency domain density of a positioning reference signal and k', which is determined according to l and the first offset.
  • the starting time-frequency position of the positioning reference signal time-frequency resource corresponding to the port in the time-frequency unit can be determined according to the offset. In this way, there is no need for the access network device to configure the terminal device with the starting time-frequency position of the positioning reference signal corresponding to the port. The signaling interaction between the access network equipment and the terminal equipment is reduced, and signaling overhead is saved.
  • the starting frequency domain position of the positioning reference signal time-frequency resource corresponding to port i on the time domain symbol a may be determined according to the second offset.
  • the unit of the first starting time-domain position may be a time-domain symbol, and the unit of the first starting frequency-domain position may be a subcarrier.
  • the following description takes the unit of the first starting time domain position as a time domain symbol and the unit of the first starting frequency domain position as a subcarrier as an example for introduction.
  • the X positioning reference signal time-frequency resources belong to M resource sets, and each resource set in the M resource sets is used for transmission Positioning reference signals corresponding to the respective positioning reference signal ports.
  • Each of the M resource sets includes LPRS time-domain symbols, where LPRS is the number of time-domain symbols continuously occupied by a positioning reference signal.
  • the frequency domain densities of the positioning reference signals corresponding to the X positioning reference signal ports respectively are the same, and the number of time domain symbols occupied by the X positioning reference signals respectively is the same.
  • the frequency domain density of each positioning reference signal is The number of time-domain symbols continuously occupied by each positioning reference signal is L PRS .
  • the time-frequency unit includes one SL time slot in the time domain.
  • the SL time slot includes L syml time-domain symbols, where L syml is an integer greater than 1.
  • L sym1 may be configured by the base station for the SL system, or may be defined in a communication standard protocol, which is not specifically limited in this application.
  • L sym1 may be configured by the base station for the SL system.
  • L sym1 may be defined in a communication standard protocol.
  • the number of time-domain symbols continuously occupied by the X positioning reference signal time-frequency resources is L PRS .
  • the frequency domain densities of the positioning reference signals corresponding to the X positioning reference signal time-frequency resources are
  • the last time domain symbol in the SL time slot is not used for transmitting the positioning reference signal.
  • the last time domain symbol in the SL slot is a guard interval (GAP) symbol.
  • GAP guard interval
  • L PRS is an integer greater than 1.
  • Implementation mode 1 the first offset corresponding to the time-frequency resource of the positioning reference signal of port i
  • the number of the time domain symbol where the starting time domain position of the time-frequency unit is located is P
  • the number of the time domain symbol where the starting time domain position of the positioning reference signal time-frequency resource of port i is located
  • the second offset corresponding to the positioning reference signal time-frequency resource of port i on the time domain symbol l is:
  • the number of the subcarrier where the starting frequency domain position of the time-frequency unit is located is R.
  • the number of the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port i on the time domain symbol l is located is:
  • % refers to the remainder.
  • k' is based on l' and sure, of which, For the related introduction of k′, please refer to the related introduction of the foregoing step 201 .
  • l is an integer greater than or equal to b and less than or equal to c. in,
  • P is an integer greater than or equal to 0 and less than or equal to the number of time domain symbols included in one SL slot.
  • R is an integer greater than or equal to 0 and less than or equal to the number of subcarriers included in one PRB.
  • i is an integer greater than or equal to 0 and less than or equal to X-1.
  • the time-frequency resources of the positioning reference signal of port i are continuously mapped to L PRS time-domain symbols in the time domain, that is, the time-domain symbols occupied by the time-frequency resources of the positioning reference signal of port i include: Combining the above formula 2 and the starting frequency domain position of the positioning reference signal time-frequency resource of port i on time domain symbol 1, the position of the subcarrier occupied by the positioning reference signal time-frequency resource of port i on time domain symbol 1 can be determined.
  • each positioning reference signal time-frequency resource may be determined according to the starting time-frequency position of each positioning reference signal time-frequency resource, the above formula 1 and the above formula 2.
  • the first time-domain symbol occupied by the first resource set in the M resource sets is the first time-domain symbol of the time-frequency unit.
  • Time domain resources included in different resource sets in the M resource sets do not overlap.
  • the time domain symbols included in two adjacent resource sets in the M resource sets are continuous.
  • the frequency-domain resources occupied by different positioning reference signal ports in the same resource set satisfy a frequency-division multiplexing relationship.
  • Each of the M resource sets is used for transmission Positioning reference signals corresponding to each positioning reference signal port.
  • Each of the M resource sets includes consecutive LPRS time-domain symbols in the time-frequency unit, where LPRS is the number of time-domain symbols continuously occupied by a positioning reference signal.
  • the time-frequency unit occupies one SL slot in the time domain, and occupies M PRBs in the frequency domain, where M is an integer greater than or equal to 1.
  • M is an integer greater than or equal to 1.
  • One SL slot includes 14 consecutive time-domain symbols, and one PRB includes 12 consecutive subcarriers. Its pattern on one PRB is shown in Figure 3A.
  • the last time domain symbol in the SL slot is not used to transmit positioning reference signals.
  • the last time domain symbol of an SL slot is a GAP symbol.
  • the frequency domain density of the positioning reference signal corresponding to the X positioning reference signal ports respectively Both are 4.
  • the number of time domain symbols L PRS continuously occupied by the positioning reference signals corresponding to the X positioning reference signal ports is all four. It can be seen from the above implementation method 1 that or,
  • the time-frequency unit includes 12 positioning reference signal time-frequency resources.
  • the 12 positioning reference signal time-frequency resources belong to three resource sets, which are resource set 1, resource set 2, and resource set 3, respectively.
  • Resource set 1 includes resource elements corresponding to time-domain symbols 0 to time-domain symbols 3 of time-frequency elements.
  • Resource set 2 includes resource elements corresponding to time-domain symbols 4 to 7 of time-frequency elements.
  • the resource set 3 includes resource elements corresponding to time-domain symbols 8 to 11 of time-frequency elements.
  • a time-division multiplexing relationship is satisfied between time-domain resources occupied by positioning reference signal ports in different resource sets at the same frequency-domain location.
  • the time-frequency resources respectively included in two adjacent resource sets are continuous in the time domain.
  • the number of time domain symbols continuously occupied by the positioning reference signal time-frequency resource corresponding to port 0 is 4, and the time domain symbol where the starting time domain position of the positioning reference signal time-frequency resource of port 0 is located is time domain symbol 0. Therefore, it can be known that the positioning reference signal time-frequency resources corresponding to port 0 occupy time-domain symbols 0 to time-domain symbols 3 .
  • the following describes the process of determining the number of the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port 0 on the time domain symbol 0 is located.
  • the first offset corresponding to the positioning reference signal time-frequency resource of port 1 P 0. Therefore, it can be known that the number b of the time-domain symbol where the initial time-domain position of the positioning reference signal time-frequency resource of port 0 is located is 0, which is the time-domain symbol 0 of the instant-frequency unit.
  • the number of time domain symbols continuously occupied by the positioning reference signal time-frequency resources corresponding to port 0 is L PRS
  • the time domain symbol where the starting time domain position of the positioning reference signal time-frequency resources of port 1 is located is time domain symbol 0 . Therefore, it can be known that the positioning reference signal time-frequency resources corresponding to port 1 occupy time domain symbols 0 to 3 in the time domain.
  • the following describes the process of determining the number of the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port 1 on the time domain symbol 0 is located.
  • the positioning reference signals corresponding to ports 0 to 3 respectively may be used as a PRS group.
  • the positioning reference signals corresponding to ports 4 to 7 respectively may be used as a PRS group, and the positioning reference signals corresponding to ports 8 to port 11 respectively may be used as a PRS group.
  • the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port 0 on the time domain symbol 0 is located is subcarrier 0.
  • the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port 1 on time domain symbol 0 is located is subcarrier 1.
  • the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port 2 on the time domain symbol 0 is located is the subcarrier 2.
  • the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port 3 on the time domain symbol 0 is located is subcarrier 3 .
  • the subcarriers where the starting frequency domain positions of the positioning reference signal time-frequency resources of different ports are located on the time domain symbol 0 are different. Therefore, on the same time domain symbol, the positioning reference signals corresponding to ports 0 to 3 respectively are mapped to different subcarriers in the PRB. In this way, on the same time domain symbol, the frequency domain resources corresponding to ports 0 to 3 respectively satisfy the frequency division multiplexing relationship.
  • the positioning reference signal time-frequency resource may be determined according to the starting time-frequency position of the positioning reference signal time-frequency resource, the above formula 1 and the above formula 2.
  • the resource set 1 is used to transmit the positioning reference signals corresponding to ports 0 to 3 respectively.
  • Resource set 2 is used to transmit positioning reference signals corresponding to ports 4 to 7 respectively.
  • Resource set 3 is used to transmit positioning reference signals corresponding to ports 8 to 11 respectively.
  • the time-domain symbols 12 and 13 may be idle symbols, or may be used as GAP symbols, or may be used as symbols for other purposes, which are not specifically limited in this application.
  • the time-frequency unit occupies one SL slot in the time domain, and occupies M PRBs in the frequency domain, where M is an integer greater than or equal to 1.
  • M is an integer greater than or equal to 1.
  • One SL slot includes 14 consecutive time-domain symbols, and one PRB includes 12 consecutive subcarriers. Its pattern on one PRB is shown in Figure 3B.
  • the last time domain symbol in the SL slot is not used to transmit positioning reference signals.
  • the last time domain symbol of an SL slot is a GAP symbol.
  • the frequency domain density of the positioning reference signal corresponding to the X positioning reference signal ports respectively Both are 2.
  • the number of time domain symbols L PRS continuously occupied by the positioning reference signals corresponding to the X positioning reference signal ports is 6, respectively.
  • the time-frequency unit includes four positioning reference signal time-frequency resources.
  • the four positioning reference signal time-frequency resources correspond to the four positioning reference signal ports respectively.
  • the four positioning reference signal time-frequency resources belong to two resource sets, which are resource set 1 and resource set 2 respectively.
  • Resource set 1 includes resource units corresponding to time-domain symbols 0 to time-domain symbols 5 of the time-frequency unit.
  • the resource set 2 includes resource elements corresponding to time-domain symbols 6 to time-domain symbols 11 of the time-frequency unit.
  • a time-division multiplexing relationship is satisfied between time-domain resources occupied by positioning reference signal ports in different resource sets at the same frequency-domain location.
  • the time-frequency resources respectively included in two adjacent resource sets are continuous in the time domain.
  • the first offset corresponding to the positioning reference signal time-frequency resource of port 0 P 0. Therefore, it can be known that the time-domain symbol where the starting time-domain position of the positioning reference signal time-frequency resource of port 0 is located is time-domain symbol 0.
  • the following describes the process of determining the number of the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port 0 on the time domain symbol 0 is located.
  • the first offset corresponding to the positioning reference signal time-frequency resource of port 1 P 0. Therefore, it can be known that the time-domain symbol where the starting time-domain position of the positioning reference signal time-frequency resource of port 1 is located is time-domain symbol 0. Time domain symbol 0 of the instant frequency unit. The number of time domain symbols continuously occupied by the positioning reference signal time-frequency resource corresponding to port 1 is 6, and the time domain symbol where the starting time domain position of the positioning reference signal time-frequency resource of port 1 is located is time domain symbol 0. Therefore, it can be known that the positioning reference signal time-frequency resources corresponding to port 1 occupy time domain symbols 0 to 5.
  • the following describes the process of determining the number of the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port 1 on the time domain symbol 0 is located.
  • the process of determining the starting time domain position and starting frequency domain position of the positioning reference signal time-frequency resources corresponding to other positioning reference signal ports is also similar.
  • the starting time-frequency position of each positioning reference signal time-frequency resource may be determined according to the starting time-frequency position of each positioning reference signal time-frequency resource, the above formula 1 and the above formula 2.
  • the resource set 1 is used to transmit the positioning reference signals corresponding to ports 0 to 1 respectively.
  • Resource set 2 is used to transmit positioning reference signals corresponding to ports 2 to 3 respectively.
  • the time-domain symbol 12 and the time-domain symbol 13 may be idle symbols, or may be used as GAP symbols, or may be used as symbols for other purposes, which are not specifically limited in this application.
  • the time domain resources included in different resource sets do not overlap.
  • terminal devices can select time-frequency resources of different resource sets to transmit positioning reference signals. This avoids the problem that terminal devices cannot send and receive positioning reference signals at the same time, thereby realizing positioning between terminal devices.
  • different terminal devices in the SL system can transmit positioning reference signals on different subcarriers on the same time domain symbol, thereby improving resource utilization.
  • Implementation mode 2 the first offset corresponding to the time-frequency resource of the positioning reference signal of the port i
  • the number of the time domain symbol where the starting time domain position of the time-frequency unit is located is P, then the number of the time domain symbol where the starting time domain position of the positioning reference signal time-frequency resource of port i is located
  • the second offset corresponding to the positioning reference signal time-frequency resource of port i on the time domain symbol l is:
  • the number of the subcarrier where the starting frequency domain position of the time-frequency unit is located is R, then the numbering of the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port i is located on the time domain symbol 1 is
  • k' is based on l' and sure, of which, For the related introduction of k′, please refer to the related introduction of the foregoing step 201 .
  • l is an integer greater than or equal to b and less than or equal to c. in,
  • P is an integer greater than or equal to 0 and less than or equal to the number of time domain symbols included in one SL slot.
  • R is an integer greater than or equal to 0 and less than or equal to the number of subcarriers included in one PRB.
  • i is an integer greater than or equal to 0 and less than or equal to X-1.
  • the time-frequency resources of the positioning reference signal of port i are continuously mapped to L PRS time-domain symbols in the time domain, that is, the time-domain symbols occupied by the time-frequency resources of the positioning reference signal of port i include: Combining the above formula 2 and the starting frequency domain position of the positioning reference signal time-frequency resource of port i on time domain symbol 1, the position of the subcarrier occupied by the positioning reference signal time-frequency resource of port i on time domain symbol 1 can be determined.
  • each positioning reference signal time-frequency resource may be determined according to the starting time-frequency position of each positioning reference signal time-frequency resource, the above formula 1 and the above formula 2.
  • the first time-domain symbol occupied by the first resource set in the M resource sets is the first time-domain symbol of the time-frequency unit.
  • Time domain resources included in different resource sets in the M resource sets do not overlap.
  • a frequency-division multiplexing relationship is satisfied between the frequency-domain resources occupied by different positioning reference signal ports in the same resource set on the same time-domain symbol.
  • Each of the M resource sets is used for transmission Positioning reference signals corresponding to each positioning reference signal port.
  • Each of the M resource sets includes consecutive LPRS time-domain symbols in the time-frequency unit, where LPRS is the number of time-domain symbols continuously occupied by a positioning reference signal.
  • the time-domain symbol following the last time-domain symbol included in each resource set is a GAP symbol. If there are more than two resource sets, there is one GAP symbol between two adjacent resource sets.
  • the order of the M resource sets is sorted according to the index size of the time domain symbols included in each resource set.
  • the time-domain symbols included in the resource set with the smaller indexes are ranked first, and the time-domain symbols included in the resource set with the larger indexes are ranked at the back.
  • resource set 1 includes time domain symbol 0 to time domain symbol 3
  • resource set includes time domain symbol 5 to time domain symbol 8 . Therefore, it can be known that resource set 1 is the first resource set, and resource set 2 is the second resource set.
  • the time-frequency unit occupies one SL time slot in the time domain, and occupies M PRBs in the frequency domain, where M is an integer greater than or equal to 1.
  • M is an integer greater than or equal to 1.
  • One SL slot includes 14 consecutive time-domain symbols, and one PRB includes 12 consecutive subcarriers. Its pattern on one PRB is shown in Figure 3C.
  • the last time domain symbol in the SL slot is not used to transmit positioning reference signals.
  • the last time domain symbol of an SL slot is a GAP symbol.
  • the frequency domain density of the positioning reference signal corresponding to the X positioning reference signal ports respectively Both are 4.
  • the number of time domain symbols L PRS continuously occupied by the positioning reference signals corresponding to the X positioning reference signal ports is all four.
  • the time-frequency unit includes 8 positioning reference signal time-frequency resources.
  • the eight positioning reference signal time-frequency resources correspond to the eight positioning reference signal ports respectively.
  • the eight positioning reference signal time-frequency resources belong to two resource sets, namely resource set 1 and resource set 2, respectively.
  • Resource set 1 includes resource elements corresponding to time-domain symbols 0 to time-domain symbols 3 of time-frequency elements.
  • Resource set 2 includes resource elements corresponding to time-domain symbols 5 to 8 of time-frequency elements.
  • a time-division multiplexing relationship is satisfied between time-domain resources occupied by positioning reference signal ports in different resource sets at the same frequency-domain location.
  • the preceding time-domain symbol (time-domain symbol 4) of the first time-domain symbol (time-domain symbol 5) included in resource set 2 is a GAP symbol.
  • the following describes the process of determining the number of the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port 0 on the time domain symbol 0 is located.
  • the number of time domain symbols continuously occupied by the positioning reference signal time-frequency resource corresponding to port 4 is 4, and the time domain symbol where the starting time domain position of the positioning reference signal time-frequency resource of port 4 is located is time domain symbol 5. Therefore, it can be known that the positioning reference signal time-frequency resources corresponding to port 4 occupy time domain symbols 5 to 8.
  • the following describes the process of determining the number of the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port 4 on the time domain symbol 0 is located.
  • the positioning reference signal time-frequency resource may be determined according to the starting time-frequency position of the positioning reference signal time-frequency resource, the above formula 1 and the above formula 2.
  • the resource set 1 is used to transmit the positioning reference signals corresponding to ports 0 to 3 respectively.
  • Resource set 2 is used to transmit positioning reference signals corresponding to ports 4 to 7 respectively.
  • time domain symbols 10 to 14 may be idle symbols, or may be used as GAP symbols, or may be used as symbols for other purposes, which are not specifically limited in this application.
  • the time domain resources included in different resource sets do not overlap.
  • terminal devices can select time-frequency resources of different resource sets to transmit positioning reference signals. This avoids the problem that terminal devices cannot send and receive positioning reference signals at the same time, thereby realizing positioning between terminal devices.
  • different resource sets are separated by GAP symbols. Therefore, different resource sets can be selected between terminal devices to transmit positioning reference signals, so that the terminal devices can switch the transceiving state on GAP symbols between resource sets, so as to better receive or send positioning reference signals.
  • different terminal devices in the SL system can transmit positioning reference signals on different subcarriers on the same time domain symbol, thereby improving resource utilization.
  • Implementation mode 3 the first offset corresponding to the time-frequency resource of the positioning reference signal of the port i
  • the number of the time-domain symbol where the initial time-domain position of the time-frequency unit is located is P. Then the number of the time-domain symbol where the starting time-domain position of the positioning reference signal time-frequency resource of port i is located is:
  • the number of the subcarrier where the starting frequency domain position of the time-frequency unit is located is R.
  • the number of the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port i on the time domain symbol l is located is:
  • % means remainder.
  • k' is based on l' and sure, of which, For the related introduction of k′, please refer to the related introduction of the foregoing step 201 .
  • l is an integer greater than or equal to b and less than or equal to c. in,
  • P is an integer greater than or equal to 0 and less than or equal to the number of time domain symbols included in one SL slot.
  • R is an integer greater than or equal to 0 and less than or equal to the number of subcarriers included in one PRB.
  • i is an integer greater than or equal to 0 and less than or equal to X-1.
  • the time-frequency resources of the positioning reference signal of port i are continuously mapped to L PRS time-domain symbols in the time domain, that is, the time-domain symbols occupied by the time-frequency resources of the positioning reference signal of port i include: Combining the above formula 2 and the starting frequency domain position of the positioning reference signal time-frequency resource of port i on time domain symbol 1, the position of the subcarrier occupied by the positioning reference signal time-frequency resource of port i on time domain symbol 1 can be determined.
  • each positioning reference signal time-frequency resource may be determined according to the starting time-frequency position of each positioning reference signal time-frequency resource, the above formula 1 and the above formula 2.
  • each resource set in the M resource sets is used for transmission Positioning reference signals corresponding to each positioning reference signal port.
  • Each of the M resource sets includes consecutive LPRS time-domain symbols in the time-frequency unit, where LPRS is the number of time-domain symbols continuously occupied by a positioning reference signal.
  • the time-domain symbol preceding the first time-domain symbol included in each resource set in the time-frequency unit is an automatic gain control (automatic gain control, AGC) symbol.
  • AGC automatic gain control
  • the time-domain symbol following the last time-domain symbol included in each resource set in the time-frequency unit is a GAP symbol.
  • the signal sent by the terminal device on the previous time domain symbol of the first time domain symbol included in each resource set is the signal sent by the terminal device on the first time domain symbol included in each resource set. copy of the signal.
  • implementation mode 3 is described below with reference to FIG. 3D .
  • the time-frequency unit occupies one SL slot in the time domain, and occupies M PRBs in the frequency domain, where M is an integer greater than or equal to 1.
  • M is an integer greater than or equal to 1.
  • One SL slot includes 14 consecutive time-domain symbols, and one PRB includes 12 consecutive subcarriers. Its pattern on one PRB is shown in Figure 3D.
  • the last time domain symbol in the SL slot is not used to transmit positioning reference signals.
  • the last time domain symbol of an SL slot is a GAP symbol.
  • the frequency domain density of the positioning reference signal corresponding to the X positioning reference signal ports respectively Both are 4.
  • the number of time domain symbols L PRS continuously occupied by the positioning reference signals corresponding to the X positioning reference signal ports is all four.
  • the time-frequency unit includes 8 positioning reference signal time-frequency resources.
  • the eight positioning reference signal time-frequency resources correspond to the eight positioning reference signal ports respectively.
  • the eight positioning reference signal time-frequency resources belong to two resource sets, namely resource set 1 and resource set 2, respectively.
  • Resource set 1 includes resource elements corresponding to time-domain symbol 1 to time-domain symbol 4 of the time-frequency unit.
  • Resource set 2 includes resource elements corresponding to time-domain symbols 6 to 9 of time-frequency elements.
  • a time-division multiplexing relationship is satisfied between time-domain resources occupied by positioning reference signal ports in different resource sets at the same frequency-domain location.
  • the preceding time-domain symbol (time-domain symbol 0) of the first time-domain symbol (time-domain symbol 1) included in resource set 1 is an AGC symbol.
  • the time-domain symbol (time-domain symbol 5) following the last time-domain symbol (time-domain symbol 4) included in resource set 1 is a GAP symbol.
  • the signal sent by the terminal device on time-domain symbol 0 is a copy of the signal sent by the terminal device on time-domain symbol 1.
  • the preceding time-domain symbol (time-domain symbol 6 ) of the first time-domain symbol (time-domain symbol 7 ) included in resource set 2 is an AGC symbol.
  • the time-domain symbol (time-domain symbol 10) following the last time-domain symbol (time-domain symbol 9) included in resource set 2 is a GAP symbol.
  • the signal sent by the terminal device on time-domain symbol 6 is a copy of the signal sent by the terminal device on time-domain symbol 7 .
  • the following describes the process of determining the number of the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port 0 on the time domain symbol 0 is located.
  • the following describes the process of determining the number of the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port 4 on time domain symbol 0 is located.
  • the positioning reference signal time-frequency resource may be determined according to the starting time-frequency position of the positioning reference signal time-frequency resource, the above formula 1 and the above formula 2.
  • resource set 1 is used to transmit positioning reference signals corresponding to ports 0 to 3 respectively.
  • Resource set 2 is used to transmit positioning reference signals corresponding to ports 4 to 7 respectively.
  • time domain symbols 12 to 13 may be idle symbols, or may be used as GAP symbols, or may be used as symbols for other purposes, which are not specifically limited in this application.
  • the time domain resources included in different resource sets do not overlap.
  • terminal devices can select time-frequency resources of different resource sets to transmit positioning reference signals. This avoids the problem that terminal devices cannot send and receive positioning reference signals at the same time, thereby realizing positioning between terminal devices.
  • the frequency domain resources corresponding to different positioning reference signal ports satisfy the frequency division multiplexing relationship, thereby improving the utilization rate of the resources.
  • different terminal devices in the SL system can transmit positioning reference signals on different subcarriers on the same time domain symbol, thereby improving resource utilization.
  • different resource sets are separated by GAP symbols. Different resource sets can be selected between terminal devices to transmit positioning reference signals, so that the devices in the device can switch the transceiver state on GAP symbols between resource sets, so as to better receive or send positioning reference signals.
  • the previous time domain symbol of the first time domain symbol included in each resource set is an AGC symbol, so that the receiving terminal device can adjust the received power on the AGC symbol to ensure that the introduced power of the receiving terminal device is at a reasonable level.
  • the signal sent by the terminal device on the previous time domain symbol of the first time domain symbol included in each resource set is a copy of the signal sent by the terminal device on the first time domain symbol included in each resource set.
  • the signal on the AGC symbol is designed as the signal of the first time domain symbol included in each resource set.
  • the receiving terminal equipment can reasonably set the receiving power of the receiving terminal equipment according to the power of the positioning reference signal to be transmitted, so as to improve the receiving performance and the network transmission performance.
  • the present application provides the starting point of the positioning reference signal time-frequency resource corresponding to each positioning reference signal port.
  • the several possible implementation manners can make the resource sets evenly distributed on the time-frequency units, thereby reducing the inter-symbol interference between the resource sets.
  • the time-frequency unit includes one SL time slot
  • the SL time slot includes L syml time domain symbols, where L syml is an integer greater than 1.
  • L sym1 may be configured by the base station for the SL system, or may be defined in a communication standard protocol, which is not specifically limited in this application.
  • the number of time-domain symbols continuously occupied by the X positioning reference signal time-frequency resources is L PRS , and the frequency domain densities of the positioning reference signals corresponding to the X positioning reference signal time-frequency resources respectively are is an integer greater than or equal to 1, and L PRS is an integer greater than 1.
  • the last time domain symbol in the SL time slot is not used for transmitting the positioning reference signal.
  • the last time domain symbol in the SL slot is a GAP symbol.
  • % means remainder.
  • k' is based on l' and sure, of which, For the related introduction of k′, please refer to the related introduction of the foregoing step 201 .
  • l is an integer greater than or equal to b and less than or equal to c. in,
  • P is an integer greater than or equal to 0 and less than or equal to the number of time domain symbols included in one SL slot.
  • R is an integer greater than or equal to 0 and less than or equal to the number of subcarriers included in one PRB.
  • i is an integer greater than or equal to 0 and less than or equal to X-1.
  • M is the number of resource sets included in the X positioning reference signal time-frequency resources.
  • the time-frequency resources of the positioning reference signal of port i are continuously mapped to L PRS time-domain symbols in the time domain, that is, the time-domain symbols occupied by the time-frequency resources of the positioning reference signal of port i include: Combining the above formula 2 and the starting frequency domain position of the positioning reference signal time-frequency resource of port i on time domain symbol 1, the position of the subcarrier occupied by the positioning reference signal time-frequency resource of port i on time domain symbol 1 can be determined.
  • the first time-domain symbol occupied by the first resource set in the M resource sets is the first time-domain symbol of the time-frequency unit.
  • Time domain resources included in different resource sets in the M resource sets do not overlap.
  • a frequency-division multiplexing relationship is satisfied between the frequency-domain resources occupied by different positioning reference signal ports in the same resource set on the same time-domain symbol.
  • frequency-domain resources corresponding to different positioning reference signal ports satisfy a frequency-division multiplexing relationship.
  • Each of the M resource sets is used for transmission Positioning reference signals corresponding to the respective positioning reference signal ports.
  • Each of the M resource sets includes consecutive LPRS time-domain symbols in a time-frequency unit, where LPRS is the number of time-domain symbols continuously occupied by a positioning reference signal.
  • the specific positions of the X positioning reference signal time-frequency resources in the time-frequency unit are determined according to the starting time domain positions of the X positioning reference signal time-frequency resources determined in the fourth implementation manner, the above formula 1 and the above formula 2. In this way, the M resource sets can be equally distributed in the time-frequency unit.
  • the time-frequency unit occupies one SL slot in the time domain, and occupies M PRBs in the frequency domain, where M is an integer greater than or equal to 1.
  • M is an integer greater than or equal to 1.
  • One SL slot includes 14 consecutive time-domain symbols, and one PRB includes 12 consecutive subcarriers. Its pattern on one PRB is shown in Figure 3E.
  • the last time domain symbol in the SL slot is not used to transmit positioning reference signals.
  • the last time domain symbol of an SL slot is a GAP symbol.
  • the frequency domain density of the positioning reference signal corresponding to the X positioning reference signal ports respectively Both are 2.
  • the number of time domain symbols L PRS continuously occupied by the positioning reference signals corresponding to the X positioning reference signal ports is 6, respectively.
  • the time-frequency unit includes four positioning reference signal time-frequency resources.
  • the four positioning reference signal time-frequency resources correspond to the four positioning reference signal ports respectively.
  • the four positioning reference signal time-frequency resources belong to two resource sets, which are resource set 1 and resource set 2 respectively. Since resource set 1 and resource set 2 are evenly distributed in the time-frequency unit, each resource set is used to transmit positioning reference signals corresponding to two positioning reference signal ports respectively. Therefore, it can be known that the resource set 1 is used to transmit the positioning reference signals corresponding to the port 0 and the port 1 respectively. Resource set 2 is used to transmit positioning reference signals corresponding to port 2 and port 3 respectively.
  • time domain symbol 6 and the time domain symbol 13 can be used as GAP symbols, or as idle symbols, or as symbols for other purposes, which are not specifically limited in this application.
  • the time domain resources included in different resource sets do not overlap.
  • terminal devices can select time-frequency resources of different resource sets to transmit positioning reference signals. This avoids the problem that terminal devices cannot send and receive positioning reference signals at the same time, thereby realizing positioning between terminal devices.
  • the frequency domain resources corresponding to different positioning reference signal ports satisfy the frequency division multiplexing relationship, thereby improving the utilization rate of the resources.
  • different terminal devices in the SL system can transmit positioning reference signals on different subcarriers on the same time domain symbol, thereby improving resource utilization.
  • Multiple resource sets are equally distributed in the time-frequency unit to ensure that the distance between resource sets is maximized, which can reduce inter-symbol interference between resource sets.
  • Implementation mode 5 the first offset corresponding to the time-frequency resource of the positioning reference signal of the port i
  • the number of the time-domain symbol where the initial time-domain position of the time-frequency unit is located is P.
  • the number of the subcarrier where the starting frequency domain position of the time-frequency unit is located is R.
  • the number of the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port i on the time domain symbol l is located is:
  • % means remainder.
  • k' is based on l' and sure, of which, For the related introduction of k′, please refer to the related introduction of the foregoing step 201 .
  • P is an integer greater than or equal to 0 and less than or equal to the number of time domain symbols included in one SL slot.
  • R is an integer greater than or equal to 0 and less than or equal to the number of subcarriers included in one PRB.
  • i is an integer greater than or equal to 0 and less than or equal to X-1.
  • the time-frequency resources of the positioning reference signal of port i are continuously mapped to L PRS time-domain symbols in the time domain, that is, the time-domain symbols occupied by the time-frequency resources of the positioning reference signal of port i include:
  • the position of the subcarrier occupied by the time-frequency resource of the positioning reference signal of port i in the time-frequency unit can be determined by combining the above formula 2 and the second offset corresponding to port i.
  • the first resource set in the M resource sets includes the resource unit corresponding to the first time-domain symbol of the time-frequency unit.
  • Each of the M resource sets is used for transmission Positioning reference signals corresponding to the respective positioning reference signal ports.
  • Each of the M resource sets includes consecutive LPRS time-domain symbols in the time-frequency unit, where LPRS is the number of time-domain symbols continuously occupied by a positioning reference signal.
  • the time-domain symbol following the last time-domain symbol included in each resource set is a GAP symbol. If there are more than two resource sets, there is one GAP symbol between two adjacent resource sets.
  • the specific positions of the X positioning reference signal time-frequency resources in the time-frequency unit are determined according to the starting time domain positions of the X positioning reference signal time-frequency resources determined in the fifth implementation manner, the above formula 1 and the above formula 2. In this way, the M resource sets can be equally distributed in the time-frequency unit.
  • the time-frequency unit occupies one SL slot in the time domain, and occupies M PRBs in the frequency domain, where M is an integer greater than or equal to 1.
  • M is an integer greater than or equal to 1.
  • One SL slot includes 14 consecutive time-domain symbols, and one PRB includes 12 consecutive subcarriers. Its pattern on one PRB is shown in Figure 3F.
  • the last time domain symbol in the SL slot is not used to transmit positioning reference signals.
  • the last time domain symbol of an SL slot is a GAP symbol.
  • the frequency domain density of the positioning reference signal corresponding to the X positioning reference signal ports respectively Both are 4.
  • the number of time domain symbols L PRS continuously occupied by the positioning reference signals corresponding to the X positioning reference signal ports respectively is 4.
  • the time-frequency unit includes 8 positioning reference signal time-frequency resources.
  • the eight positioning reference signal time-frequency resources correspond to the eight positioning reference signal ports respectively.
  • the eight positioning reference signal time-frequency resources belong to two resource sets, namely resource set 1 and resource set 2, respectively.
  • each resource set is used to transmit positioning reference signals corresponding to two positioning reference signal ports respectively. Therefore, it can be known that the resource set 1 includes resource elements corresponding to time-domain symbols 0 to time-domain symbols 3 of the time-frequency elements. That is, resource set 1 is used to transmit positioning reference signals corresponding to port 0, port 1, port 2, and port 3 respectively.
  • Resource set 2 includes resource elements corresponding to time-domain symbols 6 to 9 of time-frequency elements. That is, the resource set 2 is used to transmit the positioning reference signals corresponding to the port 4, the port 5, the port 6 and the port 7 respectively.
  • the time-domain symbol 4 and the time-domain symbol 11 in the time-frequency unit are both used as GAP symbols.
  • time domain symbols 5 to 6, and time domain symbols 12 to 13 can be used as GAP symbols, idle symbols, or symbols for other purposes. Application is not limited.
  • the time domain resources included in different resource sets do not overlap.
  • terminal devices can select time-frequency resources of different resource sets to transmit positioning reference signals. This avoids the problem that terminal devices cannot send and receive positioning reference signals at the same time, thereby realizing positioning between terminal devices.
  • the frequency domain resources corresponding to different positioning reference signal ports satisfy the frequency division multiplexing relationship, thereby improving the utilization rate of the resources.
  • different terminal devices in the SL system can transmit positioning reference signals on different subcarriers on the same time domain symbol, thereby improving resource utilization.
  • Multiple resource sets are equally distributed in the time-frequency unit to ensure that the distance between resource sets is maximized, which can reduce inter-symbol interference between resource sets.
  • Implementation mode 6 the first offset corresponding to the time-frequency resource of the positioning reference signal of the port i
  • the number of the time-domain symbol where the initial time-domain position of the time-frequency unit is located is P. Then the number of the time domain symbol where the starting time domain position of the positioning reference signal time-frequency resource of port i is located
  • the second offset corresponding to the positioning reference signal time-frequency resource of port i on the time domain symbol l is:
  • the number of the subcarrier where the starting frequency domain position of the time-frequency unit is located is R.
  • the number of the subcarrier where the starting frequency domain position of the positioning reference signal time-frequency resource of port i on the time domain symbol l is located is:
  • k' is based on l' and sure, of which,
  • k′ please refer to the related introduction of the foregoing step 201 .
  • l is an integer greater than or equal to b and less than or equal to c. in,
  • P is an integer greater than or equal to 0 and less than or equal to the number of time domain symbols included in one SL slot.
  • R is an integer greater than or equal to 0 and less than or equal to the number of subcarriers included in one PRB.
  • i is an integer greater than or equal to 0 and less than or equal to X-1.
  • the time-frequency resources of the positioning reference signal of port i are continuously mapped to L PRS time-domain symbols in the time domain, that is, the time-domain symbols occupied by the time-frequency resources of the positioning reference signal of port i include: Combining the above formula 2 and the starting frequency domain position of the positioning reference signal time-frequency resource of port i on time domain symbol 1, the position of the subcarrier occupied by the positioning reference signal time-frequency resource of port i on time domain symbol 1 can be determined.
  • each resource set in the M resource sets is used for transmission Positioning reference signals corresponding to the respective positioning reference signal ports.
  • Each of the M resource sets includes consecutive LPRS time-domain symbols in the time-frequency unit, where LPRS is the number of time-domain symbols continuously occupied by a positioning reference signal.
  • the time-domain symbol preceding the first time-domain symbol included in each resource set in the time-frequency unit is an AGC symbol.
  • the time-domain symbol following the last time-domain symbol included in each resource set in the time-frequency unit is a GAP symbol.
  • the signal sent by the terminal device on the previous time domain symbol of the first time domain symbol included in each resource set is a copy of the signal sent by the terminal device on the first time domain symbol included in each resource set.
  • the specific positions of the X positioning reference signal time-frequency resources in the time-frequency unit are determined according to the starting time domain positions of the X positioning reference signal time-frequency resources determined in the sixth implementation manner, the above formula 1 and the above formula 2. In this way, the M resource sets can be equally distributed in the time-frequency unit.
  • the time-frequency unit occupies one SL slot in the time domain, and occupies M PRBs in the frequency domain, where M is an integer greater than or equal to 1.
  • M is an integer greater than or equal to 1.
  • One SL slot includes 14 consecutive time-domain symbols, and one PRB includes 12 consecutive subcarriers. Its pattern on one PRB is shown in Figure 3G.
  • the last time domain symbol in the SL slot is not used to transmit positioning reference signals.
  • the last time domain symbol of an SL slot is a GAP symbol.
  • the frequency domain density of the positioning reference signal corresponding to the X positioning reference signal ports respectively Both are 4.
  • the number of time domain symbols L PRS continuously occupied by the positioning reference signals corresponding to the X positioning reference signal ports respectively is 4.
  • the time-frequency unit includes 8 positioning reference signal time-frequency resources.
  • the eight positioning reference signal time-frequency resources correspond to the eight positioning reference signal ports respectively.
  • the eight positioning reference signal time-frequency resources belong to two resource sets, namely resource set 1 and resource set 2, respectively.
  • each resource set is used to transmit positioning reference signals corresponding to four positioning reference signal ports respectively.
  • resource set 1 includes resource elements corresponding to time-domain symbol 1 to time-domain symbol 4 . That is, resource set 1 is used to transmit positioning reference signals corresponding to ports 0 to 3 respectively.
  • Resource set 2 includes resource elements corresponding to time-domain symbol 8 to time-domain symbol 11 . Resource set 2 is used to transmit positioning reference signals corresponding to ports 4 to 7 respectively.
  • the preceding time-domain symbol (time-domain symbol 0) of the first time-domain symbol (time-domain symbol 1) included in resource set 1 is an AGC symbol.
  • the time-domain symbol (time-domain symbol 5) following the last time-domain symbol (time-domain symbol 4) included in resource set 1 is a GAP symbol.
  • the signal sent by the terminal device on time-domain symbol 0 is a copy of the signal sent by the terminal device on time-domain symbol 1.
  • the preceding time-domain symbol (time-domain symbol 7) of the first time-domain symbol (time-domain symbol 8) included in resource set 2 is an AGC symbol.
  • the time-domain symbol (time-domain symbol 12 ) following the last time-domain symbol (time-domain symbol 11 ) included in resource set 2 is a GAP symbol.
  • the signal sent by the terminal device on the time-domain symbol 7 is a copy of the signal sent by the terminal device on the time-domain symbol 8 .
  • the time domain symbol 6 and the time domain symbol 13 may be used as GAP symbols, idle symbols, or symbols for other purposes, which are not specifically limited in this application.
  • the positioning reference signal time-frequency resource may be determined according to the starting time-frequency position of the positioning reference signal time-frequency resource, the above formula 1 and the above formula 2.
  • the time domain resources included in different resource sets do not overlap.
  • terminal devices can select time-frequency resources of different resource sets to transmit positioning reference signals. This avoids the problem that terminal devices cannot send and receive positioning reference signals at the same time, thereby realizing positioning between terminal devices.
  • the frequency domain resources corresponding to different positioning reference signal ports satisfy the frequency division multiplexing relationship, thereby improving the utilization rate of the resources.
  • different terminal devices in the SL system can transmit positioning reference signals on different subcarriers on the same time domain symbol, thereby improving resource utilization.
  • different resource sets are separated by GAP symbols. Different resource sets can be selected between terminal devices to transmit positioning reference signals, so that the devices in the device can switch the transceiver state on GAP symbols between resource sets, so as to better receive or send positioning reference signals.
  • the previous time domain symbol of the first time domain symbol included in each resource set is an AGC symbol, so that the receiving terminal device can adjust the received power on the AGC symbol to ensure that the introduced power of the receiving terminal device is at a reasonable level.
  • the signal sent by the terminal device on the previous time domain symbol of the first time domain symbol included in each resource set is a copy of the signal sent by the terminal device on the first time domain symbol included in each resource set.
  • the signal on the AGC symbol is designed as the signal of the first time domain symbol included in each resource set.
  • the receiving terminal equipment can reasonably set the receiving power of the receiving terminal equipment according to the power of the positioning reference signal to be transmitted, so as to improve the receiving performance.
  • Multiple resource sets are equally distributed in the time-frequency unit to ensure that the distance between resource sets is maximized, which can reduce inter-symbol interference between resource sets and improve network transmission performance.
  • the following describes the technical solutions of the embodiments of the present application by taking the first terminal device as a sending terminal device and the second terminal device as a receiving terminal device as an example.
  • FIG. 4 is a schematic diagram of another embodiment of a method for determining a resource according to an embodiment of the present application.
  • the resource determination method includes:
  • the first terminal device sends first information to the second terminal device.
  • the second terminal device receives the first information from the first terminal device.
  • the SL connection is established between the first terminal device and the second terminal device, and the first information is used to indicate the port of the first positioning reference signal.
  • the first positioning reference signal is a positioning reference signal to be sent by the first terminal device to the second terminal device.
  • the PC5 interface is used for positioning between the first terminal device and the second terminal device.
  • the first terminal device determines the first port corresponding to the first positioning reference signal.
  • the first terminal device sends the first information to the second terminal device.
  • the first information includes the port number of the first port.
  • the second terminal device determines the first port according to the first information.
  • the first information further includes: a time interval between a starting time domain position of the resource used for transmitting the first positioning reference signal and a time domain position where the first terminal device sends the first information.
  • the first terminal device determines a second port corresponding to the second positioning reference signal.
  • the second positioning reference signal is a positioning reference signal to be sent by the second terminal device to the first terminal device. That is, the second positioning reference signal is a positioning reference signal to be received by the first terminal device from the second terminal device.
  • the first information further includes the port number of the second port.
  • the first information further includes: a time interval between the starting time domain position of the resource used for transmitting the second positioning reference signal and the time domain position where the first terminal device sends the first information.
  • the first information includes sidelink control information (SCI), and the SCI includes the port number of the first port and the port number of the second port.
  • SCI sidelink control information
  • the first terminal device determines the port corresponding to the positioning reference signal as an example for description.
  • the second terminal device may also determine the port corresponding to the positioning reference signal, and then notify the first terminal device, which will not be repeated here.
  • the first terminal device and the second terminal device respectively determine the port corresponding to the positioning reference signal by themselves.
  • the first positioning reference signal corresponds to the first port
  • the first positioning reference signal is a positioning reference signal to be sent by the first terminal device to the second terminal device.
  • the second positioning reference signal corresponds to the second port
  • the second positioning reference signal is a positioning reference signal to be sent by the second terminal device to the first terminal device.
  • the first terminal device sends first information to the second terminal device, where the first information includes the port number of the first port. Then, the second terminal device can determine the first port.
  • the first information further includes a time interval between the starting time domain position of the resource used for transmitting the first positioning reference signal and the time domain position where the first terminal device sends the first information.
  • the second terminal device sends the second information to the first terminal device.
  • the second information includes the port number of the second port.
  • the second information further includes a time interval between the starting time domain position of the resource used for transmitting the second positioning reference signal and the time domain position where the first terminal device sends the first information.
  • the first information and the second information may be SCI.
  • the positioning requirement scenario of the SL system is usually the positioning between terminal devices.
  • the first terminal device sends the first positioning reference signal to the second terminal device as an example for description.
  • the process of sending the second positioning reference signal by the second terminal device to the first terminal device is similar to this embodiment, and details are not repeated here.
  • the first terminal device determines that the first positioning reference signal corresponds to port 1 .
  • the first terminal device sends first information to the second terminal device, where the first information includes the port number of port 1 .
  • the second terminal device determines a port corresponding to the first positioning reference signal according to the first information.
  • the first information is used to indicate the port corresponding to the first positioning reference signal.
  • the first information includes a port number of a port corresponding to the first positioning reference signal.
  • the second terminal device determines the port number of the port corresponding to the first positioning reference signal according to the first information.
  • the second terminal device determines the first resource in the time-frequency unit according to the port corresponding to the first positioning reference signal.
  • the first terminal device determines the first resource in the time-frequency unit according to the port corresponding to the first positioning reference signal.
  • Both steps 403 and 404 are similar to the process in which the terminal device determines the first resource in step 201 in the embodiment shown in FIG. 2A .
  • steps 403 and 404 are similar to the process in which the terminal device determines the first resource in step 201 in the embodiment shown in FIG. 2A .
  • Steps 401 to 403 may be performed first, and then step 404; or, step 404 may be performed first, and then steps 401 to 403 may be performed; or, depending on the situation, steps 401 to 403 and step 404 may be performed at the same time, which is not specifically limited in this application. .
  • the first terminal device sends the first positioning reference signal to the second terminal device on the first resource.
  • the second terminal device receives the first positioning reference signal from the first terminal device on the first resource.
  • the first positioning reference signal corresponds to port 1 .
  • the first resource includes the positioning reference signal time-frequency resource of port 1 in FIG. 3A .
  • the first terminal device sends the first positioning reference signal to the second terminal device on the positioning reference signal time-frequency resource of port 1.
  • the second terminal device receives the first positioning reference signal on the time-frequency resource of the positioning reference signal of port 1, and measures the first positioning reference signal to obtain a measurement result. Then, the second terminal device determines the position of the first terminal device according to the measurement result.
  • the first terminal device sends the first information to the second terminal device.
  • the first information is used to indicate the port corresponding to the first positioning reference signal.
  • the second terminal device determines the port corresponding to the first positioning reference signal according to the indication information, and determines the first resource according to the two ports corresponding to the first positioning reference signal.
  • the first terminal device can send the first positioning reference signal on the first resource.
  • the second terminal device receives the first positioning reference signal on the first resource, so as to realize the positioning of the first terminal device by the second terminal device.
  • the present application also provides another technical solution, through which the terminal device determines the resource used for transmitting the positioning reference signal in the SL system.
  • the following description will be made with reference to the embodiment shown in FIG. 5 .
  • FIG. 5 is a schematic diagram of an embodiment of a method for determining a resource according to an embodiment of the present application.
  • the resource determination method includes:
  • the terminal device acquires indication information.
  • the indication information is used to determine the first resource set.
  • the first resource set is used to send the first positioning reference signal of the terminal device.
  • the first resource set and the second resource set are orthogonal in the frequency domain and overlap in the time domain.
  • the second resource set is used to send a sidelink physical layer feedback channel (physical sidelink feedback channel, PSFCH) carrying sidelink hybrid automatic repeat request (SL HARQ) information.
  • PSFCH physical sidelink feedback channel
  • SL HARQ sidelink hybrid automatic repeat request
  • the second resource set is an empty set, that is, no resource for feeding back HARQ-ACK information is allocated on the time slot where the PSFCH is located.
  • the indication information is used to indicate a first resource set used for transmitting positioning reference signals and a second resource set used for PSFCH transmission in the PSFCH time slot.
  • the indication information includes a bitmap.
  • the bitmap is used to indicate the first resource set and the second resource set, and each bit in the bitmap corresponds to one PRB.
  • FIG. 6A is one PSFCH slot.
  • time domain symbol 10 and time domain symbol 11 are used to transmit the PSFCH.
  • the bitmap is "0101010101010101".
  • the PRB corresponding to the bit “0” in the bitmap is used to transmit the positioning reference signal.
  • the PRB corresponding to the bit "1" in the bitmap may be used to transmit the PSFCH by default. That is, the bitmap indirectly indicates the second resource set for transmitting the PSFCH.
  • PRB1 PRB3, PRB5, PRB7, PRB9, PRB11, PRB13, PRB15, PRB17 and PRB19 are used to transmit PSFCH.
  • FIG. 6A shows that on the time domain symbol 10 and the time domain symbol 11, the PRB corresponding to the bit “0" in the bitmap is used to transmit the positioning reference signal, and the bit "1" in the bitmap "The corresponding PRB can be used by default for the implementation of sending the PSFCH.
  • the following scheme can also be designed: on the time domain symbol 10 and the time domain symbol 11, the PRB corresponding to the bit "1” in the bitmap is used to transmit the PSFCH, and the bit "0" in the bitmap
  • the corresponding PRBs are used to transmit positioning reference signals. That is, the bitmap directly indicates the first resource set and the second resource set.
  • the first resource set and the second resource set are indicated by the same indication information.
  • the indication information is used to indicate the first resource set used for transmitting the positioning reference signal in the PSFCH time slot.
  • the resources used to transmit the PSFCH carrying the SL HARQ in the PSFCH time slot are configured through a bitmap, and each bit in the bitmap corresponds to one PRB.
  • time domain symbol 10 and time domain symbol 11 are used for PSFCH transmission.
  • the bitmap is "0101010101010101".
  • PRB corresponding to the bit "1" in the bitmap is used to transmit the PSFCH. That is, in the PSFCH time slot, on time domain symbol 10 and time domain symbol 11, PRB1, PRB3, PRB5, PRB7, PRB9, PRB11, PRB13, PRB15, PRB17 and PRB19 are used to transmit PSFCH.
  • the terminal device After the terminal device receives the bitmap "010101010101010101", the terminal device determines that the PRB corresponding to the bit "1" in the bitmap is used to send the PSFCH, and the PRB corresponding to the bit "0" in the bitmap is an idle PRB.
  • the PRBs corresponding to the bit "0" in the bitmap are PRB0, PRB2, PRB4, PRB6, PRB8, PRB10, PRB12, PRB14, PRB16, and PRB18, respectively.
  • the terminal device receives the indication information, where the indication information is "1010111111".
  • the indication information is used to indicate whether the PRB corresponding to the bit “0" in "010101010101010101" in the above bitmap is used for transmitting positioning reference signals.
  • the bit “1” in the indication information is used to indicate that the PRB corresponding to the corresponding bit “0” in the bitmap is used for transmitting the positioning reference signal.
  • the bit “0” in the indication information is used to indicate that the PRB corresponding to the corresponding bit "0" in the bitmap cannot be used to transmit the positioning reference signal.
  • the first bit “1” in the indication information "1010111111” indicates that the PRB corresponding to the first "bit 0" in “0101010101010101" in the bitmap can be used for transmitting positioning reference signals.
  • the second bit “0” in the indication information "1010111111” indicates that the PRB corresponding to the second "bit 0" in "0101010101010101” in the bitmap cannot be used for transmitting positioning reference signals.
  • the third bit “1” in the indication information "1010111111” indicates that the PRB corresponding to the third "bit 0" in "0101010101010101" in the bitmap can be used to transmit a positioning reference signal.
  • the tenth bit “1" in the indication information "1010111111” indicates that the PRB corresponding to the tenth "bit 0" of "010101010101010101" in the bitmap can be used to transmit a positioning reference signal.
  • PRB0, PRB4, PRB8, PRB10, PRB12, PRB14, PRB16 and PRB18 are used for transmitting positioning reference signals. Please refer to Fig. 6B for details.
  • FIG. 6A and FIG. 6B show the implementation manner in which the PRB corresponding to the bit "1" in the bitmap is used for sending the PSFCH.
  • the PRB corresponding to the bit "0" in the bitmap may be used to transmit the PSFCH.
  • the bits included in the indication information in the foregoing step 501 are respectively used to indicate whether the PRB corresponding to the bit "1" in the foregoing bitmap is used for transmitting the positioning reference signal.
  • the first resource set and the second resource set are indicated by different indication information.
  • the first resource set used for transmitting positioning reference signals and the second resource set used for PSFCH transmission overlap in the time domain (that is, both the first resource set and the second resource set occupy PSFCH time slots.
  • the time-domain symbols 10 and time-domain symbols 11) are orthogonal in the frequency domain.
  • the terminal device determines a first resource set according to the indication information.
  • the indication information includes a bitmap. As shown in FIG. 6A , the bitmap is “0101010101010101”, and the PRB corresponding to the bit “0” in the bitmap is used to transmit a positioning reference signal.
  • the terminal equipment determines, according to the bitmap, the PRBs in the PSFCH time slot for transmitting the positioning reference signal.
  • the above-mentioned embodiment shown in FIG. 5 may further include step 503 .
  • Step 503 is performed after step 502 .
  • the terminal device transmits the first positioning reference signal on the first resource set.
  • the first condition includes that the ratio between the first difference and the first bandwidth is greater than or equal to a preset threshold.
  • the first difference is the difference between the PRB index of the first physical resource block and the second PRB index.
  • the first PRB index is the maximum PRB index used for sending the first positioning reference signal in the same time domain symbol indicated by the indication information.
  • the second PRB index is the smallest PRB index used for sending the first positioning reference signal within the same time domain symbol indicated by the indication information.
  • the first bandwidth is the bandwidth of the resource pool where the PSCCH and/or the PSSCH are located; or, the first bandwidth is the number of frequency domain physical resource blocks indicated by the bit length of the indication information.
  • the size of the preset threshold is set according to the positioning accuracy requirement of the terminal device.
  • the terminal device may determine the corresponding preset threshold according to the mapping relationship and the positioning accuracy requirement of the terminal device.
  • the PRBs used for transmitting the positioning reference signal appear at equal density. That is, the bit "0" in the bitmap is of equal density.
  • the PRBs used for transmitting the positioning reference signal may also appear in an unequal density. The following will be introduced in conjunction with the example shown in FIG. 6C .
  • FIG. 6C shows a PSFCH time slot, in which time domain symbol 10 and time domain symbol 11 are used for PSFCH transmission.
  • the bitmap is "00011111110100000111".
  • the PRB corresponding to the bit "0" in the bitmap is used to transmit the positioning reference signal.
  • the PRB corresponding to the bit "1" in the bitmap may be used to transmit the PSFCH by default. That is, the bitmap indirectly indicates the second resource set for transmitting the PSFCH.
  • the terminal device uses the first resource set to transmit the first positioning reference signal.
  • the bandwidth requirement of the positioning reference signal can be met.
  • the equivalent bandwidth of the positioning reference signal can be made equal to the bandwidth of the resource pool where the PSCCH and/or the PSSCH are located, thereby obtaining higher positioning accuracy.
  • idle resources are used to send the positioning reference signal to meet the positioning requirement.
  • the largest PRB index is 16, and the smallest PRB index is 0.
  • the first difference is then equal to 16.
  • the bitmap is "00011111110100000111", and each bit corresponds to one PRB. Therefore, it can be seen that the first bandwidth is 20.
  • the ratio of the first difference to the first bandwidth is then equal to 16/20.
  • the preset threshold is 0.7. Then it can be known that the ratio of the first difference to the first bandwidth is greater than the preset threshold, and the terminal device can transmit the first positioning reference signal on the first resource set.
  • the terminal device determines the port corresponding to the first positioning reference signal. Then, the terminal device determines the first resource corresponding to the port corresponding to the first positioning reference signal from the first resource set. The terminal device transmits the first positioning reference signal on the first resource.
  • the terminal device determines the port corresponding to the first positioning reference signal; then, the terminal device determines the starting frequency domain position of the first positioning reference signal on one or more time domain symbols according to the port corresponding to the first positioning reference signal.
  • the terminal device determines the first resource according to the starting frequency domain position of the first positioning reference signal, and transmits the first positioning reference signal on the first resource.
  • the first resource set includes X positioning reference signal time-frequency resources, where the X positioning reference signal time-frequency resources correspond to the X positioning reference signal ports, and X is an integer greater than or equal to 1.
  • the X positioning reference signal ports are determined according to the frequency domain density of the positioning reference signal.
  • the frequency domain density of the positioning reference signal refers to the density of the PRS mapping in the frequency domain.
  • the frequency domain density of the positioning reference signal is defined from at least one of the following two aspects:
  • Aspect 1 The density of positioning reference signals mapped in the frequency domain within one PRB.
  • the density of the positioning reference signal mapped in the frequency domain within a PRB is calculated by characterization.
  • Aspect 2 In the resource pool of SL-PRS, one positioning reference signal is transmitted on one logical RB in every R logical RBs.
  • the aspect 2 may be characterized by the number R of resource subsets included in the first resource set. That is, in the resource pool of the SL-PRS, the positioning reference signal is transmitted in an interlaced manner on logical RBs, and one logical RB is used for mapping the positioning reference signal in every R logical RBs.
  • R may be pre-configured, or specified by a communication protocol, or configured by the access network device for the terminal device through signaling (for example, RRC signaling), which is not specifically limited in this application, and R is greater than or equal to 1 Integer.
  • signaling for example, RRC signaling
  • the logical RB refers to that the PRBs included in the first resource set are rearranged in a frequency domain order to form a continuous logical RB. Logical indices corresponding to adjacent logical RBs are consecutive.
  • the RBs shown in FIG. 6A for transmitting positioning reference signals are rearranged to obtain the logical RBs shown in FIG. 6D .
  • Each logical RB corresponds to a logical index.
  • the logical indices corresponding to two adjacent logical RBs are consecutive.
  • logical RB0 in FIG. 6D corresponds to PRB0 in FIG. 6A
  • logical RB1 in FIG. 6D corresponds to PRB2 in FIG. 6A
  • logical RB2 in FIG. 6D corresponds to PRB4 in FIG. 6A
  • logical RB3 in FIG. 6D corresponds to FIG.
  • FIG. 6D correspond to the physical PRB6 in FIG. 6A
  • the logical RB5 in FIG. 6D corresponds to the physical PRB8 in FIG. 6A
  • the logical RB6 in FIG. 6D corresponds to the physical PRB10 in FIG. 6A
  • FIG. 6D The logical RB7 in FIG. 6A corresponds to the physical PRB12 in FIG. 6A
  • the logical RB8 in FIG. 6D corresponds to the physical PRB14 in FIG. 6A
  • the logical RB9 in FIG. 6D corresponds to the physical PRB16 in FIG. 6A
  • the logical RB10 in FIG. 6D corresponds to the physical PRB16 in FIG. 6A.
  • the physical PRB18 corresponds to the physical PRB6 in FIG. 6A
  • the logical RB5 in FIG. 6D corresponds to the physical PRB8 in FIG. 6A
  • the logical RB6 in FIG. 6D corresponds to the physical PRB10 in FIG. 6A
  • the first resource set includes R resource subsets.
  • Each resource subset includes L time-domain symbols, which are time-domain symbols used for transmitting positioning reference signals in the PSFCH slot.
  • the time domain symbols occupied by different resource subsets overlap.
  • the logical RB index included in the jth resource subset in the R resource subsets is j+k*R.
  • j is an integer greater than or equal to 1 and less than R.
  • k is an integer greater than or equal to 0 and less than or equal to the first ratio.
  • the first ratio is the ratio of the number of logical RBs to R.
  • Each resource subset is used for transmission The positioning reference signals of the positioning reference signal ports, That is, the first resource set is used for transmission The positioning reference signal of the positioning reference signal port.
  • the frequency-domain resources occupied by the positioning reference signal ports in different resource subsets satisfy a frequency-division multiplexing relationship.
  • R the time domain symbol 10 and the time domain symbol 11 are used to transmit the positioning reference signal.
  • resource subset 0 includes logical RB0, logical RB2, logical RB4, logical RB6, logical RB8 and logical RB10 in the frequency domain.
  • Resource subset 0 includes time domain symbols 10 and 11 in the time domain.
  • Resource subset 1 includes logical RB1, logical RB3, logical RB5, logical RB7 and logical RB9 in the frequency domain.
  • Resource subset 1 includes time domain symbols 10 and time domain symbols 11 in the time domain. It can be seen from this that on the time domain symbol 10, the frequency domain resources occupied by the positioning reference signal ports in the resource subset 0 and the resource subset 1 satisfy the frequency division multiplexing relationship. On the time domain symbol 11, the frequency domain resources occupied by the positioning reference signal ports in the resource subset 0 and the resource subset 1 satisfy the frequency division multiplexing relationship, thereby improving the utilization rate of the resources.
  • the positioning reference signal time-frequency resources corresponding to ports 0 to 3 respectively belong to resource subset 0. It can be seen from FIG. 6E that, on the time domain symbol 10, in the resource subset 0, the frequency domain resources occupied by ports 0 to 3 respectively satisfy the frequency division multiplexing relationship.
  • the number of the subcarrier where the starting frequency domain position corresponding to port i on one or more time domain symbols is located is: i is an integer greater than or equal to 0 and less than or equal to X-1.
  • the unit of the starting frequency domain position is a subcarrier.
  • the unit of the starting frequency domain position involved in the following is a subcarrier, and details are not repeated here.
  • the one or more time-domain symbols are time-domain symbols used for transmitting positioning reference signals in the PSFCH time slot.
  • k' represents the relative frequency-domain offset of the port on each time-domain symbol.
  • k' can be based on l' and Sure. in, l represents the time domain symbol index of the positioning reference signal corresponding to port i in the PSFCH slot, Indicates the time-domain symbol index in the PSFCH slot of the first time-domain symbol used for transmitting the positioning reference signal in the PSFCH slot.
  • the number of the subcarrier where the starting frequency domain position of the port on one or more time domain symbols is located can be determined by the above formula Sure.
  • the first resource set includes two resource subsets with reference to FIG. 6E .
  • Resource subset 0 includes logical RB0, logical RB2, logical RB4, logical RB6, logical RB8, and logical RB10.
  • Resource subset 1 includes logical RB1, logical RB3, logical RB5, logical RB7 and logical RB9.
  • the right part of FIG. 6E is an enlarged schematic view of the dotted line part of FIG. 6E .
  • FIG. 6E shows the mapping situation of positioning reference signals on the resources included in the dotted line part in the left part of FIG. 6E .
  • the mapping of the positioning reference signals of the resources in other parts in the left part of FIG. 6E is similar, and will not be described one by one here.
  • the number of the subcarrier where the corresponding starting frequency domain position of the positioning reference signal time-frequency resource corresponding to the positioning reference signal port on the two time domain symbols is located is: Then, specific positions of the eight positioning reference signal time-frequency resources are determined in combination with the corresponding starting frequency domain positions on the two time-domain symbols of the eight positioning reference signal time-frequency resources. Please refer to the right part of FIG. 6E for the specific mapping situation.
  • the first resource set includes a resource subset with reference to FIG. 6F .
  • the first resource set includes one resource subset, which is resource subset 0.
  • Resource subset 0 includes logical RB0 to logical RB9.
  • the right part of FIG. 6F is an enlarged schematic diagram of the dotted line part in the left part of FIG. 6F , and the right part of FIG. 6F shows the distribution of each positioning reference signal time-frequency resource on the resources of the dotted line part in the left part of FIG. 6F .
  • the distribution of the positioning reference signal time-frequency resources on other parts of the resources is similar, and will not be described one by one here.
  • the first time domain symbol in the PSFCH time slot used for transmitting the positioning reference signal is used as the AGC symbol.
  • the signal sent by the terminal device on the first time domain symbol is a copy of the signal sent by the terminal device on the second time domain symbol used for transmitting the positioning reference signal in the PSFCH time slot.
  • the second time-domain symbol is the second time-domain symbol in the PSFCH slot for transmitting the positioning reference signal.
  • the implementation is described below with reference to FIG. 6G .
  • FIG. 6G is an enlarged schematic diagram of the dashed line part in FIG. 6E
  • FIG. 6G shows the distribution of positioning reference signal time-frequency resources on the resources of the dashed line part in FIG. 6E .
  • the distribution of the positioning reference signal time-frequency resources on other parts of the resources is similar, and will not be described one by one here.
  • the first time-domain symbol in the PSFCH slot for transmitting the positioning reference signal is used as an AGC symbol.
  • the above formula can be used The numbers of the subcarriers where the respective corresponding starting frequency domain positions of the eight positioning reference time-frequency resources on the second time domain symbol are located may be determined.
  • the specific positions of the eight positioning reference time-frequency resources are determined in combination with the numbers of the subcarriers where the corresponding starting frequency domain positions of the eight positioning reference time-frequency resources are located on the second time-domain symbol.
  • the specific distribution of the eight positioning reference time-frequency resources is shown in FIG. 6G .
  • the signal sent by the terminal device on the first time domain symbol may be a copy of the signal sent by the terminal device on the second time domain symbol.
  • FIG. 6H only shows the enlarged schematic diagram of the dotted line in FIG. 6F .
  • FIG. 6H shows the distribution of positioning reference signal time-frequency resources on the resources in the dotted line part of FIG. 6F .
  • the distribution of the positioning reference signal time-frequency resources is similar, and will not be described one by one here.
  • the first time-domain symbol in the PSFCH slot for transmitting the positioning reference signal is used as the AGC symbol.
  • the above formula can be used.
  • the numbers of the subcarriers where the corresponding starting frequency domain positions of the four positioning reference signal time-frequency resources in the second time domain symbol are located can be determined; then, combined with the four positioning reference signal time-frequency resources in the second time domain
  • the numbers of the subcarriers where the corresponding starting frequency domain positions on the symbols are located determine the specific positions of the time-frequency resources of the four positioning reference signals.
  • the signal sent by the terminal device on the first time domain symbol is a replica of the signal sent by the terminal device on the second time domain symbol.
  • the terminal device acquires indication information, and the indication information is used to determine the first resource set.
  • the first resource set is used to transmit the first positioning reference signal of the terminal device.
  • the first resource set and the second resource set are orthogonal in the frequency domain and overlap in the time domain; the second resource set is used to send the PSFCH bearing SL HARQ; the terminal device determines the first resource set according to the indication information.
  • the terminal device can determine the resource used for transmitting the positioning reference signal in the SL system.
  • idle resources are used to send the positioning reference signal to meet the positioning requirement.
  • FIG. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication apparatus may be used to perform the steps performed by the terminal device in the embodiment shown in FIG. 2A , and may also be used to perform the steps performed by the first terminal device or the second terminal device in the embodiment shown in FIG. 4 .
  • FIG. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication apparatus may be used to perform the steps performed by the terminal device in the embodiment shown in FIG. 2A , and may also be used to perform the steps performed by the first terminal device or the second terminal device in the embodiment shown in FIG. 4 .
  • FIG. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication apparatus may be used to perform the steps performed by the terminal device in the embodiment shown in FIG. 2A , and may also be used to perform the steps performed by the first terminal device or the second terminal device in the embodiment shown in FIG. 4 .
  • FIG. 7 is
  • the communication device includes a processing module 701 and a transceiver module 702 .
  • the processing module 701 is configured to determine a first resource according to the port of the first positioning reference signal, the first resource is used for transmitting the first positioning reference signal, the first resource is located in a time-frequency unit, and when the time-frequency unit includes X positioning reference signals frequency resources, the X positioning reference signal time-frequency resources correspond to the X positioning reference signal ports respectively, and X is an integer greater than or equal to 2;
  • the transceiver module 702 is configured to transmit the first positioning reference signal on the first resource.
  • the port of the first positioning reference signal is a port sensed by the communication device.
  • the transceiver module 702 is further configured to:
  • first information where the first information is used to indicate a port of the first positioning reference signal.
  • the X positioning reference signal time-frequency resources include at least two positioning reference signal time-frequency resources, and in the at least two positioning reference signal time-frequency resources, different positioning reference signal ports at the same frequency domain position The corresponding time domain resources satisfy the time division multiplexing relationship.
  • the X positioning reference signal time-frequency resources include at least two positioning reference signal time-frequency resources, and in the at least two positioning reference signal time-frequency resources, different positioning reference signal ports on the same time domain symbol The corresponding frequency domain resources satisfy the frequency division multiplexing relationship.
  • the X positioning reference signal time-frequency resources include at least two resource sets, and in the at least two resource sets, the time domain corresponding to the positioning reference signal ports in different resource sets at the same frequency domain position Time division multiplexing relationship is satisfied between resources.
  • the X positioning reference signal time-frequency resources include at least two resource sets, and in the at least two resource sets, the frequency domain corresponding to different positioning reference signal ports in the same resource set on the same time domain symbol The resources satisfy the frequency division multiplexing relationship.
  • the X positioning reference signal time-frequency resources include M resource sets, the time domain resources included in different resource sets in the M resource sets do not overlap, and the value of M is related to X and a positioning Frequency Domain Density of Reference Signal related.
  • each resource set in the M resource sets is used for transmission Positioning reference signals corresponding to the positioning reference signal ports, each resource set in the M resource sets includes LPRS time domain symbols, and LPRS is the number of time domain symbols continuously occupied by one positioning reference signal.
  • the first initial time domain position is determined according to the first offset, and the first initial frequency domain position is determined according to the second offset;
  • the first offset is the offset of the first starting time domain position relative to the starting time domain position of the time-frequency unit
  • the second offset is the second starting frequency domain position relative to the starting frequency of the time-frequency unit. the offset of the domain position
  • the first starting time domain position is the starting time domain position of the positioning reference signal time-frequency resource corresponding to port i in the X positioning reference signal ports;
  • the first starting frequency domain position is the starting frequency domain position of the positioning reference signal time-frequency resource corresponding to port i in the X positioning reference signal ports on the time domain symbol 1;
  • i is an integer greater than or equal to 0 and less than or equal to X-1;
  • l is an integer greater than or equal to b and less than or equal to c
  • b is the number of the time-domain symbol where the first starting time-domain position is located
  • c is the sum of the number of time-domain symbols continuously occupied by the positioning reference signal corresponding to port i and b one less;
  • the first offset is based on the i, the frequency domain density of a positioning reference signal It is determined by the number of time domain symbols L PRS continuously occupied by a positioning reference signal;
  • the second offset is based on i, the frequency domain density of a positioning reference signal and k', which is determined according to l and the first offset.
  • the first offset is determined according to X, the number of time-domain symbols L PRS continuously occupied by a positioning reference signal, and the number of symbols L sym1 contained in the time-frequency unit.
  • the second offset is % means remainder.
  • the first offset is In the case of , the signal sent by the communication device on the signal of the first time domain symbol is a copy of the signal sent by the communication device on the second time domain symbol;
  • the first time-domain symbol is the previous time-domain symbol of the second time-domain symbol in the time-frequency unit
  • the second time-domain symbol is the first time-domain symbol in the L PRS time-domain symbols included in each resource set in the M resource sets. Domain notation.
  • the X positioning reference signal ports are determined according to at least one parameter among the first parameter, the second parameter, and the third parameter;
  • the first parameter is the number of time-domain symbols L syml included in the time-frequency unit, where L syml is an integer greater than or equal to 1;
  • the second parameter is the number of time domain symbols LPRS continuously occupied by a positioning reference signal in the time domain, where LPRS is an integer greater than or equal to 1;
  • the third parameter is the frequency domain density of a positioning reference signal is an integer greater than or equal to 1.
  • the processing module 701 determines the first resource according to the port of the first positioning reference signal. Then, the transceiver module 702 transmits the first positioning reference signal on the first resource. Therefore, there is no need for the access network equipment to configure the starting time-frequency resources for transmitting the positioning reference signal, which reduces signaling interaction between the access network equipment and the communication apparatus, and saves signaling overhead.
  • the time-frequency unit may include X positioning reference signal time-frequency resources, and the X positioning reference signal time-frequency resources correspond to the X positioning reference signal ports respectively.
  • the real-time frequency unit can be used for the transmission of X positioning reference signals, and the utilization rate of resources is high.
  • FIG. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • the communication apparatus may be configured to perform the steps performed by the terminal device in the embodiment shown in FIG. 5 .
  • FIG. 5 please refer to the relevant introduction in the foregoing method embodiments.
  • the communication device includes a transceiver module 801 and a processing module 802 .
  • the transceiver module 801 is configured to obtain indication information, where the indication information is used to determine a first resource set, and the first resource set is used to send a first positioning reference signal of a communication device; the first resource set and the second resource set are in the same frequency domain. and overlap in the time domain; the second resource set is used to send the PSFCH bearing SL HARQ;
  • the processing module 802 is configured to determine the first resource set according to the indication information.
  • the transceiver module 801 is further used for:
  • the first condition includes that the ratio between the first difference and the first bandwidth is greater than or equal to a preset threshold
  • the first difference is the difference between the PRB index and the second PRB index
  • the first PRB index is the maximum PRB index used for sending the first positioning reference signal in the same time domain symbol indicated by the indication information
  • the second PRB index is the minimum PRB index used for sending the first positioning reference signal in the same time domain symbol indicated by the indication information
  • the first bandwidth is the bandwidth of the resource pool where the PSCCH and/or PSSCH are located, or,
  • the first bandwidth is the number of frequency domain physical resource blocks indicated by the bit length of the indication information.
  • the indication information is further used to determine the second resource set.
  • the first resource set includes X positioning reference signal time-frequency resources, where the X positioning reference signal time-frequency resources correspond to the X positioning reference signal ports, and X is an integer greater than or equal to 2.
  • the X number of positioning reference signal ports are determined according to the frequency domain density of one positioning reference signal.
  • the first resource set includes at least two resource subsets, and in the at least two resource subsets, between frequency domain resources corresponding to positioning reference signal ports in different resource subsets on the same time domain symbol To meet the frequency division multiplexing relationship;
  • frequency-domain resources corresponding to different positioning reference signal ports in the same resource subset on the same time-domain symbol satisfy a frequency-division multiplexing relationship.
  • each resource subset in the at least two resource subsets is used for transmission
  • the positioning reference signal of each port Indicates the mapping density of a positioning reference signal in the frequency domain within a PRB.
  • the transceiver module 801 acquires indication information, and the indication information is used to determine the first resource set.
  • the first resource set is used to transmit a first positioning reference signal of the communication device.
  • the first resource set and the second resource set are orthogonal in the frequency domain and overlap in the time domain; the second resource set is used to send the PSFCH carrying the SL HARQ; the processing module 802 determines the first resource set according to the indication information.
  • the communication apparatus can determine the resources used for transmitting the positioning reference signal in the SL system.
  • idle resources are used to send the positioning reference signal to meet the positioning requirement.
  • FIG. 9 A possible structural schematic diagram in which the communication apparatus is a terminal device is shown below through FIG. 9 .
  • FIG. 9 shows a schematic structural diagram of a simplified terminal device.
  • the terminal device takes a mobile phone as an example.
  • the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used to process communication protocols and communication data, control terminal equipment, execute software programs, and process data of software programs.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal equipment may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • FIG. 9 only one memory and processor are shown in FIG. 9 . In an actual end device product, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or a storage device or the like.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
  • the antenna and the radio frequency circuit with a transceiver function may be regarded as a transceiver unit of the terminal device, and the processor with a processing function may be regarded as a processing unit of the terminal device.
  • the terminal device includes a transceiver unit 910 and a processing unit 920 .
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, or the like.
  • the processing unit may also be referred to as a processor, a processing single board, a processing module, a processing device, and the like.
  • the device for implementing the receiving function in the transceiver unit 910 may be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 910 may be regarded as a transmitting unit, that is, the transceiver unit 910 includes a receiving unit and a transmitting unit.
  • the transceiver unit may also sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may also sometimes be referred to as a receiver, receiver, or receiving circuit, or the like.
  • the transmitting unit may also sometimes be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.
  • transceiving unit 910 is configured to perform the sending and receiving operations of the terminal device in the above method embodiments
  • processing unit 920 is configured to perform other operations on the terminal device in the above method embodiments except the transceiving operations.
  • the processing unit 902 is configured to execute step 201 in FIG. 2A .
  • the transceiver unit 910 is used to execute step 203 in FIG. 2A .
  • the transceiver unit 901 is configured to perform step 401 and step 405 in FIG. 4 .
  • the processing unit 902 is configured to execute step 404 in FIG. 4 .
  • the transceiver unit 901 is configured to execute step 501 in FIG. 5
  • the processing unit 902 is configured to execute step 502 in FIG. 5 .
  • the chip When the terminal device is a chip, the chip includes a transceiver unit and a processing unit.
  • the transceiver unit may be an input/output circuit or a communication interface
  • the processing unit may be a processor or a microprocessor or an integrated circuit or a logic circuit integrated on the chip.
  • Embodiments of the present application further provide a computer program product including instructions, which, when run on a computer, cause the computer to execute the resource mapping method of the embodiments shown in FIG. 2A , FIG. 4 , and FIG. 5 .
  • Embodiments of the present application further provide a computer-readable storage medium, including computer instructions, which, when the computer instructions are executed on a computer, cause the computer to execute the resource mapping in the embodiments shown in FIG. 2A , FIG. 4 , and FIG. 5 . method.
  • An embodiment of the present application further provides a chip device, which includes a processor, which is connected to a memory and calls a program stored in the memory, so that the processor executes the above-mentioned embodiment shown in FIG. 2A , FIG. 4 , and FIG. 5 .
  • Resource mapping method which is performed by the processor.
  • the processor mentioned in any of the above can be a general-purpose central processing unit, a microprocessor, an application-specific integrated circuit (ASIC), or one or more of the above-mentioned Fig. 2A, An integrated circuit for program execution of the resource mapping method of the embodiments shown in FIG. 4 and FIG. 5 .
  • the memory mentioned in any one of the above can be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM), and the like.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium.
  • the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

Les modes de réalisation de la présente invention concernent un procédé de mappage de ressources et un appareil de communication utilisés pour réduire une interaction de signalisation entre un dispositif de réseau d'accès et un dispositif terminal et pour réduire un surdébit de signalisation. Le procédé de mappage de ressources d'après les modes de réalisation de la présente invention comprend les étapes au cours desquelles : un dispositif terminal détermine une première ressource en fonction d'un port d'un premier signal de référence de positionnement, la première ressource étant utilisée pour émettre le premier signal de référence de positionnement, la première ressource étant située dans une unité temps-fréquence, l'unité temps-fréquence contenant X ressources temps-fréquence de signal de référence de positionnement, les X ressources temps-fréquence de signal de référence de positionnement correspondant respectivement à X ports de signal de référence de positionnement et X étant un entier supérieur ou égal à 2 ; et le dispositif terminal émet le premier signal de référence de positionnement sur la première ressource.
PCT/CN2021/083292 2021-03-26 2021-03-26 Procédé de mappage de ressources et appareil de communication WO2022198640A1 (fr)

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WO2023211641A1 (fr) * 2022-04-28 2023-11-02 Apple Inc. Signal de référence de liaison latérale pour positionnement

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WO2021034076A1 (fr) * 2019-08-16 2021-02-25 엘지전자 주식회사 Procédé et appareil pour la transmission de sl prs dans v2x nr
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WO2021112610A1 (fr) * 2019-12-06 2021-06-10 엘지전자 주식회사 Procédé et dispositif pour terminal destiné à transmettre un signal de référence de positionnement dans un système de communication sans fil prenant en charge une communication en liaison latérale

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CN106716899A (zh) * 2014-08-27 2017-05-24 Lg电子株式会社 用于在无线通信系统中接收参考信号的方法及其设备
CN109462461A (zh) * 2017-09-06 2019-03-12 电信科学技术研究院 一种参考信号资源指示方法及装置
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