WO2022068836A1 - 定位参考信号的传输方法及装置、存储介质、终端 - Google Patents

定位参考信号的传输方法及装置、存储介质、终端 Download PDF

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WO2022068836A1
WO2022068836A1 PCT/CN2021/121502 CN2021121502W WO2022068836A1 WO 2022068836 A1 WO2022068836 A1 WO 2022068836A1 CN 2021121502 W CN2021121502 W CN 2021121502W WO 2022068836 A1 WO2022068836 A1 WO 2022068836A1
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reference signal
positioning reference
symbol
signal sequence
pscch
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PCT/CN2021/121502
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English (en)
French (fr)
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张萌
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展讯通信（上海）有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • 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

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  • the present invention relates to the field of communication technologies, and in particular, to a method and device for transmitting a positioning reference signal, a storage medium and a terminal.
  • NR New Radio
  • Sidelink New Radio
  • NR Uu the interface between the user equipment and the UMTS Terrestrial Radio Access Network, UTRAN for short
  • V2X Vehicle-to-Everything
  • TDOA Time Difference of Arrival
  • AoA/AoD Angle of Arrival/Angle of Launch
  • RTT Red-Trip Time
  • Multi-RTT multiple round trips Time delay
  • the technical problem solved by the present invention is how to realize the transmission of the positioning reference signal in the direct connection communication, so as to realize the positioning research in the direct connection communication.
  • an embodiment of the present invention provides a method for transmitting a positioning reference signal.
  • the method for transmitting a positioning reference signal includes: determining a positioning reference signal sequence;
  • the time-frequency resources include a plurality of consecutive symbols between the symbol bearing the PSCCH and the symbol bearing the PSFCH, wherein the starting symbol of the positioning reference signal sequence is transmitted according to the direct connection communication.
  • the starting symbol of the resource and the symbol occupied by the PSCCH are determined; the positioning reference signal sequence is sent on the time-frequency resource.
  • the mapping the positioning reference signal sequence to the target symbol in the target time slot includes: if the number of physical resource blocks in a single subchannel is greater than a preset threshold, mapping the positioning reference signal sequence to the target symbol. in the subchannel occupied by the PSCCH.
  • the time-frequency resources used for sending positioning reference signals do not include PSCCH, PSFCH and resource elements occupied by demodulation reference signals.
  • the start symbol of the direct connection communication transmission resource carries PSCCH
  • the start symbol of the communication transmission resource is the start symbol of the positioning reference signal sequence.
  • the determining the positioning reference signal sequence includes: using a first algorithm to calculate an initial value of the positioning reference signal pseudo-random sequence based on upper-layer configuration parameters; generating the positioning reference signal sequence according to the initial value; wherein, The first algorithm is expressed by the following formula: c init represents the initial value, represents the number of symbols in a single slot, represents the slot index in a radio frame, l represents the index of the OFDM symbol in the slot to which the positioning reference signal sequence is mapped, is the base station parameter.
  • the determining the positioning reference signal sequence includes: using a third algorithm to calculate an initial value of the positioning reference signal pseudo-random sequence based on upper layer configuration parameters; generating the positioning reference signal sequence according to the initial value; wherein, The third algorithm is expressed by the following formula:
  • c init represents the initial value, represents the number of symbols in a single slot, represents the slot index in a radio frame, l represents the index of the OFDM symbol in the slot to which the positioning reference signal sequence is mapped, High-level parameters configured for the base station, K is a preset integer.
  • the base station parameter is a parameter configured by Uu high-level signaling, a parameter configured by PC5 high-level signaling, the lower N bits of the CRC check bit of the first stage SCI, or the source device identifier in the direct connection communication. Determined with the destination device identifier, and N is a preset value.
  • an embodiment of the present invention also discloses a positioning reference signal transmission device.
  • the positioning reference signal transmission device includes: a sequence calculation module for determining a positioning reference signal sequence; a mapping module for converting the positioning reference signal sequence.
  • the positioning reference signal sequence is mapped to a time-frequency resource used for sending a positioning reference signal, the time-frequency resource includes a plurality of consecutive symbols between the symbol carrying the PSCCH and the symbol carrying the PSFCH, wherein the positioning reference
  • the starting symbol of the signal sequence is determined according to the starting symbol of the direct connection communication transmission resource and the symbol occupied by the PSCCH; the sequence sending module is configured to send the positioning reference signal sequence on the time-frequency resource.
  • the embodiment of the present invention further discloses a storage medium on which a computer program is stored, and when the computer program is run by a processor, the steps of the method for transmitting a positioning reference signal are executed.
  • An embodiment of the present invention further discloses a terminal, including a memory and a processor, the memory stores a computer program that can be run on the processor, and the processor executes the positioning reference when running the computer program The steps of a method of transmitting a signal.
  • the technical solution of the present invention is to determine a positioning reference signal sequence; map the positioning reference signal sequence to a time-frequency resource used for sending a positioning reference signal, and the time-frequency resource includes a symbol that bears the PSCCH and a symbol that bears the PSFCH. A plurality of consecutive symbols between, wherein the start symbol of the positioning reference signal sequence is determined according to the start symbol of the direct connection communication transmission resource and the symbol occupied by the PSCCH; Positioning reference signal sequence.
  • the technical solution of the present invention is to introduce a mapping scheme of PRS in the direct connection communication, so that the PRS can be smoothly transmitted between the terminals, and further, the positioning research on the direct connection communication can be realized.
  • the technical solution of the present invention can use the first algorithm or the second algorithm to calculate the initial value of the positioning reference signal sequence, and generate the positioning reference signal sequence according to the initial value, thereby realizing the sequence design of the Sidelink PRS.
  • FIG. 1 is a flowchart of a method for transmitting a positioning reference signal according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a positioning reference signal mapping position according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of another positioning reference signal mapping position according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of an apparatus for transmitting a positioning reference signal according to an embodiment of the present invention.
  • PRS Sidelink Positioning Reference Signal
  • the technical solution of the present invention is to determine a positioning reference signal sequence; map the positioning reference signal sequence to a time-frequency resource used for sending a positioning reference signal, and the time-frequency resource includes a symbol that bears the PSCCH and a symbol that bears the PSFCH. A plurality of consecutive symbols between, wherein the start symbol of the positioning reference signal sequence is determined according to the start symbol of the direct connection communication transmission resource and the symbol occupied by the PSCCH; Positioning reference signal sequence.
  • the technical solution of the present invention is to introduce a mapping scheme of PRS in the direct connection communication, so that the PRS can be smoothly transmitted between the terminals, and further, the positioning research on the direct connection communication can be realized.
  • GSM global system for mobile communications
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • general packet radio service general packet radio service
  • GPRS general packet radio service
  • long term evolution long term evolution
  • LTE long term evolution
  • LTE frequency division duplex frequency division duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • User equipment in the embodiments of this application may refer to user equipment, access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless Communication equipment, user agent or user equipment.
  • the UE 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 capability handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, UEs in future 5G networks or UEs in future evolved public land mobile networks (PLMN), etc. , which is not limited in the embodiments of the present application.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • FIG. 1 is a flowchart of a method for transmitting a positioning reference signal according to an embodiment of the present invention.
  • the method for transmitting a positioning reference signal may be used for a user equipment (User Equipment, UE) in a directly connected communication system, and may specifically be a sending UE, that is, the UE may perform each step of the method shown in FIG. 1 . .
  • UE User Equipment
  • the method for transmitting the positioning reference signal may include the following steps:
  • Step S101 determine a positioning reference signal sequence
  • Step S102 Map the positioning reference signal sequence to a time-frequency resource used for sending a positioning reference signal, where the time-frequency resource includes a plurality of consecutive symbols between the symbol bearing the PSCCH and the symbol bearing the PSFCH, Wherein, the start symbol of the positioning reference signal sequence is determined according to the start symbol of the direct connection communication transmission resource and the symbol occupied by the PSCCH;
  • Step S103 Send the positioning reference signal sequence on the time-frequency resource.
  • the method for transmitting the positioning reference signal may be implemented by a software program, and the software program runs in a processor integrated in a chip or a chip module.
  • a PRS sequence is first generated, and the length of the generated PRS sequence may be N RE ⁇ N RB , where N RB is a resource block (Resource Block, RB) used for Sidelink transmission N RE is the number of resource elements (Resource Element, RE) that carry PRS on one symbol in each RB.
  • N RB is a resource block (Resource Block, RB) used for Sidelink transmission
  • N RE is the number of resource elements (Resource Element, RE) that carry PRS on one symbol in each RB.
  • the PRS sequence when mapping the PRS sequence, is mapped on the time-frequency resources used for sending positioning reference signals, and the time-frequency resources used for sending positioning reference signals are part of the resources used for sidelink transmission.
  • the PRS sequence when the PRS sequence is mapped to a specific time-frequency resource, it can be represented by the following formula: in, Indicates that when the numerology is ⁇ , the index number of the antenna port is p, the kth subcarrier, the PRS information mapped on the lth symbol, r(m) represents the positioning reference signal sequence, ⁇ PRS is the power adjustment coefficient, Used to adjust the transmit power of PRS, Indicates the symbol index number at the beginning of the PRS resource in a time slot; L PRS indicates the time domain length of the PRS resource; Indicates the comb size of the PRS comb structure, that is, how many RBs or REs each place a PRS RE; Indicates the frequency domain offset of the PRS comb structure, and its granularity can be RE or RB.
  • Table 1 is a schematic diagram of the value of frequency offset k', which can be determined by the symbol index number in the PRS resource. and to make sure.
  • the time-frequency resources used for sending PRS include PSCCH-bearing A number of consecutive symbols between the symbol and the symbol carrying the PSFCH.
  • the time-frequency resources used for sending the positioning reference signal occupy the Sidelink bandwidth, so that each subcarrier in the Sidelink bandwidth carries a value of the PRS sequence.
  • Sidelink bandwidth may refer to the bandwidth of resources used for Sidelink transmission.
  • the start symbol of the positioning reference signal resource is determined according to the start symbol of the direct connection communication transmission resource and the symbol occupied by the PSCCH.
  • the LTE Positioning Protocol LTP for short
  • the time domain resources occupied by the PRS resources are the same as the time domain resources of the co-scheduled PSSCH.
  • the start symbol of the positioning reference signal sequence is the start symbol of the time-frequency resource occupied by the designated bit reference signal sequence.
  • a PRS mapping scheme is introduced into the direct connection communication, so that the PRS can be smoothly transmitted between terminals, and further, the positioning research on the direct connection communication can be realized.
  • the starting symbol of the direct-connection communication transmission resource carries PSCCH
  • the first symbol after the symbol occupied by PSCCH is determined as the starting symbol of the positioning reference signal sequence, otherwise it is determined
  • the start symbol of the direct connection communication transmission resource is the start symbol of the positioning reference signal sequence.
  • a subchannel (subchannel) of the Sidelink transmission resource may include N resource blocks, where N is a configurable value.
  • Sidelink transmission resources can carry PSCCH and PSFCH.
  • the PRS sequence may be mapped on the symbol carrying the PSCCH and the PSFCH.
  • the start symbol (SL-start symbol) of the direct connection communication transmission resource carries the PSCCH
  • the start symbol occupied by the PRS sequence is The first symbol after the symbol occupied by the PSCCH, otherwise, the start symbol occupied by the PRS sequence is the start symbol SL-start symbol of the direct connection communication transmission resource.
  • step S102 shown in FIG. 1 may include the following steps: if the number of physical resource blocks in a single subchannel is greater than a preset threshold, mapping the positioning reference signal sequence to the location occupied by the PSCCH in the subchannel.
  • the PRS and the PSCCH can be time-division multiplexed, that is, occupy the same subchannel.
  • the number of physical resource blocks in a single subchannel needs to be greater than a preset threshold to ensure positioning accuracy.
  • the specific value of the preset threshold may be configured according to an actual application scenario, which is not limited in this embodiment of the present invention.
  • the time-frequency resources used for transmitting the positioning reference signal do not include PSCCH, PSFCH and resource elements occupied by the demodulation reference signal.
  • the time-frequency resources used for sending the PRS do not conflict with the resource elements occupied by the PSCCH, the PSFCH, and the demodulation reference signal, that is, if the resource elements carry the PSCCH, the PSFCH, and the demodulation reference signal (Demodulation Reference Signal, DMRS), the PRS sequence is not mapped on these resource elements.
  • the demodulation reference signal Demodulation Reference Signal, DMRS
  • step S101 shown in FIG. 1 may include the following steps: using a first algorithm to calculate an initial value of the positioning reference signal pseudo-random sequence based on upper layer configuration parameters; generating the positioning reference signal sequence; wherein, the first algorithm is represented by the following formula: c init represents the initial value, represents the slot index in a radio frame, l represents the index of the OFDM symbol in the slot to which the positioning reference signal sequence is mapped, is the base station parameter.
  • the calculation formula for generating the positioning reference signal sequence according to the initial value is as follows: in, represents the positioning reference signal sequence, and c(i) is the first pseudo-random sequence generated by the initial value of the pseudo-random sequence c init .
  • the base station parameters are parameters configured by Uu high-level signaling, parameters configured by PC5 high-level signaling, and lower N bits of the CRC check bit of the first-stage SCI, where N is a preset value.
  • the base station parameter is determined by the source device identifier and the destination device identifier in the direct communication.
  • the base station parameter is composed of the lower P bits of the source device identification and the lower Q bits of the destination device identification in the direct connection communication, and P and Q are preset values.
  • N is 10. Then the base station parameter is the lower 10 bits of the CRC check bit of the first stage SCI.
  • the base station parameter is the lower 5 bits of the source device identification (Source ID) and the lower 5 bits of the destination device identification (Destination ID) in the direct connection communication .
  • step S101 shown in FIG. 1 may include the following steps: using a third algorithm to calculate the initial value of the positioning reference signal pseudo-random sequence c(i) based on upper layer configuration parameters; The initial value generates the positioning reference signal sequence; wherein, the third algorithm is expressed by the following formula:
  • c init represents the initial value
  • l represents the index of the OFDM symbol in the time slot to which the fixed reference signal sequence is mapped
  • High-level parameters configured for the base station K is an integer.
  • the value of K may be 1024 or other positive integers.
  • an embodiment of the present invention further discloses an apparatus for transmitting a positioning reference signal.
  • the apparatus 40 for transmitting a positioning reference signal may include:
  • a sequence calculation module 401 configured to determine a positioning reference signal sequence
  • a mapping module 402 configured to map the positioning reference signal sequence to a time-frequency resource used for sending a positioning reference signal, where the time-frequency resource includes a plurality of consecutive consecutive symbols between the symbol bearing the PSCCH and the symbol bearing the PSFCH , wherein the start symbol of the positioning reference signal sequence is determined according to the start symbol of the direct connection communication transmission resource and the symbol occupied by the PSCCH;
  • a sequence sending module 403, configured to send the positioning reference signal sequence on the time-frequency resource.
  • a mapping scheme of PRS is introduced into the direct connection communication, so that the PRS can be smoothly transmitted between terminals, and further, the positioning research on the direct connection communication can be realized.
  • the above-mentioned transmission device for the positioning reference signal may correspond to a chip with the transmission function of the positioning reference signal in the terminal device, such as SOC (System-On-a-Chip, system on chip), baseband chip, etc.; or corresponding to
  • the terminal device includes a chip module with a transmission function of positioning reference signals; or corresponds to a chip module with a data processing function chip, or corresponds to a terminal device.
  • each module/unit included in each device and product described in the above-mentioned embodiments it may be a software module/unit, a hardware module/unit, or a part of a software module/unit and a part of a hardware module/unit .
  • each module/unit included therein may be implemented by hardware such as circuits, or at least some of the modules/units may be implemented by a software program.
  • the remaining (if any) part of the modules/units can be implemented by hardware such as circuits; for each device and product applied to or integrated in the chip module, the modules/units contained therein can be They are all implemented by hardware such as circuits, and different modules/units can be located in the same component of the chip module (such as chips, circuit modules, etc.) or in different components, or at least some of the modules/units can be implemented by software programs.
  • the software program runs on the processor integrated inside the chip module, and the remaining (if any) part of the modules/units can be implemented by hardware such as circuits; for each device and product applied to or integrated in the terminal, each module contained in it
  • the units/units may all be implemented in hardware such as circuits, and different modules/units may be located in the same component (eg, chip, circuit module, etc.) or in different components in the terminal, or at least some of the modules/units may be implemented by software programs Realization, the software program runs on the processor integrated inside the terminal, and the remaining (if any) part of the modules/units can be implemented in hardware such as circuits.
  • An embodiment of the present invention further discloses a storage medium, which is a computer-readable storage medium, and stores a computer program thereon. When the computer program runs, the method for transmitting a positioning reference signal shown in FIG. 1 can be executed. A step of.
  • the storage medium may include ROM, RAM, magnetic or optical disks, and the like.
  • the storage medium may also include a non-volatile memory (non-volatile) or a non-transitory (non-transitory) memory and the like.
  • An embodiment of the present invention further discloses a terminal, where the terminal may include a memory and a processor, and the memory stores a computer program that can run on the processor. When the processor runs the computer program, the steps of the method for transmitting a positioning reference signal shown in FIG. 1 may be executed.
  • the terminals include but are not limited to terminal devices such as mobile phones, computers, and tablet computers.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA) Or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and can also be a system on chip (SoC), a central processor unit (CPU), or a network processing unit It can be a network processor (NP), a digital signal processing circuit (DSP), a microcontroller (MCU), or a programmable logic device (PLD). ) or other integrated chips.
  • SoC system on chip
  • CPU central processor unit
  • NP network processor
  • DSP digital signal processing circuit
  • MCU microcontroller
  • PLD programmable logic device
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory mentioned in the embodiments of the present invention may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components
  • the memory storage module
  • the memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

一种定位参考信号的传输方法及装置、存储介质、终端，定位参考信号的传输方法包括：确定定位参考信号序列；将所述定位参考信号序列映射到用于发送定位参考信号的时频资源上，所述时频资源包括承载有PSCCH的符号与承载有PSFCH的符号之间的多个连续的符号，其中，所述定位参考信号序列的起始符号根据所述直连通信传输资源的起始符号以及PSCCH所占用的符号确定；在所述时频资源上发送所述定位参考信号序列。本发明技术方案能够实现直连通信中定位参考信号的传输，进而实现在直连通信上的定位研究。

Description

定位参考信号的传输方法及装置、存储介质、终端
本申请要求2020年9月30日提交中国专利局、申请号为202011070063.6、发明名称为“定位参考信号的传输方法及装置、存储介质、终端”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其涉及一种定位参考信号的传输方法及装置、存储介质、终端。
背景技术
在第三代移动通信合作伙伴计划(3GPP)的版本16(Release16)的协议中，引入了新无线(New Radio，NR)直连通信(Sidelink)的研究，其主要适用于车载通信场景。此外，R16协议中，也引入了针对NR Uu(用户设备和通用移动通信系统陆地接入网络(UMTS Terrestrial Radio Access Network，简称UTRAN)之间的接口)的定位研究。
出于车联网(Vehicle-to-Everything，V2X)通信的需求，在未来很有可能会在Sidelink上进行定位研究。具体而言，可能会有相对位置定位与绝对位置定位的区分。此外，针对Sidelink的通信场景，也会有覆盖内、部分覆盖、超出覆盖(incoverage、partial-coverage，out-of-coverage)的分别讨论。在Sidelink上可以采用的候选定位技术有很多，可以包含但不限于：到达时间差(Time Difference of Arrival,TDOA)、到达角/发射角(AoA/AoD)、RTT(Round-Trip Time)和多重往返时延(Multi-RTT，其中，RTT为Round-Trip Time，即往返时延)的定位法等等。
但是，无论采用哪种定位技术，大概率都会引入Sidelink定位参 考信号(Positioning Reference Signal，PRS)。如何实现直连通信中PRS的传输是一个亟待解决的技术问题。
发明内容
本发明解决的技术问题是如何实现直连通信中定位参考信号的传输，进而实现在直连通信上的定位研究。
为解决上述技术问题，本发明实施例提供一种定位参考信号的传输方法，定位参考信号的传输方法包括：确定定位参考信号序列；将所述定位参考信号序列映射到用于发送定位参考信号的时频资源上，所述时频资源包括承载有PSCCH的符号与承载有PSFCH的符号之间的多个连续的符号，其中，所述定位参考信号序列的起始符号根据所述直连通信传输资源的起始符号以及PSCCH所占用的符号确定；在所述时频资源上发送所述定位参考信号序列。
可选的，所述将所述定位参考信号序列映射到目标时隙内的目标符号上包括：如果单个子信道中物理资源块的数量大于预设门限，则将所述定位参考信号序列映射在PSCCH所占用的子信道中。
可选的，所述用于发送定位参考信号的时频资源不包括PSCCH、PSFCH以及解调参考信号所占用的资源元素。
可选的，如果所述直连通信传输资源的起始符号承载有PSCCH，则确定PSCCH所占用的符号之后的首个符号为所述定位参考信号序列的起始符号，否则确定所述直连通信传输资源的起始符号为所述定位参考信号序列的起始符号。
可选的，所述确定定位参考信号序列包括：基于上层配置参数，采用第一算法计算所述定位参考信号伪随机序列的初始值；根据所述初始值生成所述定位参考信号序列；其中，所述第一算法采用以下公式表示：
Figure PCTCN2021121502-appb-000001
c init表示所述初始值，
Figure PCTCN2021121502-appb-000002
表示单个时隙内的符号数量，
Figure PCTCN2021121502-appb-000003
表示一个无线帧中的时隙索引，l表示所述定位参考信号序列映射到的时隙中OFDM符 号的索引，
Figure PCTCN2021121502-appb-000004
为基站参数。
可选的，所述确定定位参考信号序列包括：基于上层配置参数，采用第三算法计算所述定位参考信号伪随机序列的初始值；根据所述初始值生成所述定位参考信号序列；其中，所述第三算法采用以下公式表示：
Figure PCTCN2021121502-appb-000005
，c init表示所述初始值，
Figure PCTCN2021121502-appb-000006
表示单个时隙内的符号数量，
Figure PCTCN2021121502-appb-000007
表示一个无线帧中的时隙索引，l表示所述定位参考信号序列映射到的时隙中OFDM符号的索引，
Figure PCTCN2021121502-appb-000008
为基站配置的高层参数，K为预设整数。
可选的，所述基站参数为Uu高层信令配置的参数、PC5高层信令配置的参数、第一阶段SCI的CRC校验位的低N位比特或者由所述直连通信中源设备标识与目的设备标识确定，N为预设值。
为解决上述技术问题，本发明实施例还公开了一种定位参考信号的传输装置，定位参考信号的传输装置包括：序列计算模块，用于确定定位参考信号序列；映射模块，用于将所述定位参考信号序列映射到用于发送定位参考信号的时频资源上，所述时频资源包括承载有PSCCH的符号与承载有PSFCH的符号之间的多个连续的符号，其中，所述定位参考信号序列的起始符号根据所述直连通信传输资源的起始符号以及PSCCH所占用的符号确定；序列发送模块，用于在所述时频资源上发送所述定位参考信号序列。
本发明实施例还公开了一种存储介质，其上存储有计算机程序，所述计算机程序被处理器运行时执行所述定位参考信号的传输方法的步骤。
本发明实施例还公开了一种终端，包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机程序，所述处理器运行所述计算机程序时执行所述定位参考信号的传输方法的步骤。
与现有技术相比，本发明实施例的技术方案具有以下有益效果：
本发明技术方案通过确定定位参考信号序列；将所述定位参考信号序列映射到用于发送定位参考信号的时频资源上，所述时频资源包括承载有PSCCH的符号与承载有PSFCH的符号之间的多个连续的符号，其中，所述定位参考信号序列的起始符号根据所述直连通信传输资源的起始符号以及PSCCH所占用的符号确定；在所述时频资源上发送所述定位参考信号序列。本发明技术方案通过在直连通信中引入PRS的映射方案，使得PRS能够在终端之间顺利传输，进而能够实现在直连通信上的定位研究。
进一步地，本发明技术方案可以采用第一算法或第二算法计算定位参考信号序列的初始值，并根据所述初始值生成所述定位参考信号序列，实现了Sidelink PRS的序列设计。
附图说明
图1是本发明实施例一种定位参考信号的传输方法的流程图；
图2是本发明实施例一种定位参考信号映射位置的示意图；
图3是本发明实施例另一种定位参考信号映射位置的示意图；
图4是本发明实施例一种定位参考信号的传输装置的结构示意图。
具体实施方式
如背景技术中所述，无论采用哪种定位技术，大概率都会引入Sidelink定位参考信号(Positioning Reference Signal，PRS)。如何实现直连通信中PRS的传输是一个亟待解决的技术问题。
本发明技术方案通过确定定位参考信号序列；将所述定位参考信号序列映射到用于发送定位参考信号的时频资源上，所述时频资源包括承载有PSCCH的符号与承载有PSFCH的符号之间的多个连续的符号，其中，所述定位参考信号序列的起始符号根据所述直连通信传输资源的起始符号以及PSCCH所占用的符号确定；在所述时频资源上发送所述定位参考信号序列。本发明技术方案通过在直连通信中引入PRS的映射方案，使得PRS能够在终端之间顺利传输，进而能够实现在直连通信上的定位研究。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通信(global system for mobile communications，GSM)系统、码分多址(code division multiple access，CDMA)系统、宽带码分多址(wideband code division multiple access，WCDMA)系统、通用分组无线业务(general packet radio service，GPRS)、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、未来的第五代移动通信系统(5th generation mobile networks or 5th generation wireless systems，5G)或新空口(new radio，NR)等。
本申请实施例中的用户设备(user equipment，UE)可以指用户设备、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。UE还可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功 能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的UE或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的UE等，本申请实施例对此并不限定。
为使本发明的上述目的、特征和优点能够更为明显易懂，下面结合附图对本发明的具体实施例做详细的说明。
图1是本发明实施例一种定位参考信号的传输方法的流程图。
本发明实施例的定位参考信号的传输方法可以用于直连通信系统中的用户设备(User Equipment,UE)，具体可以是发送UE，也即可以由该UE执行图1所示方法的各个步骤。
具体而言，所述定位参考信号的传输方法可以包括以下步骤：
步骤S101：确定定位参考信号序列；
步骤S102：将所述定位参考信号序列映射到用于发送定位参考信号的时频资源上，所述时频资源包括承载有PSCCH的符号与承载有PSFCH的符号之间的多个连续的符号，其中，所述定位参考信号序列的起始符号根据所述直连通信传输资源的起始符号以及PSCCH所占用的符号确定；
步骤S103：在所述时频资源上发送所述定位参考信号序列。
需要指出的是，本实施例中各个步骤的序号并不代表对各个步骤的执行顺序的限定。
可以理解的是，在具体实施中，所述定位参考信号的传输方法可以采用软件程序的方式实现，该软件程序运行于芯片或芯片模组内部集成的处理器中。
本实施例中，在发送定位参考信号序列之前，首先生成PRS序列，生成的PRS序列的长度可以是N RE×N RB，其中，N RB是用于Sidelink传输的资源块(Resource Block,RB)的数量，N RE是每个RB内 的一个符号上承载有PRS的资源元素(Resource Element,RE)的数量。
具体实施中，在映射PRS序列时，将PRS序列映射在用于发送定位参考信号的时频资源上，用于发送定位参考信号的时频资源是用于Sidelink传输的资源的一部分。
在一个非限制性的实施例中，在将PRS序列映射至具体的时频资源时，可以通过下面的公式体现：
Figure PCTCN2021121502-appb-000009
Figure PCTCN2021121502-appb-000010
其中，
Figure PCTCN2021121502-appb-000011
表示在numerology为μ时，天线端口(antenna port)索引号为p，第k个子载波，第l个符号上映射的PRS信息,r(m)表示定位参考信号序列,β PRS为功率调整系数，用来调整PRS的发射功率，
Figure PCTCN2021121502-appb-000012
表示的是一个时隙中PRS资源起始的符号索引号；L PRS表示PRS资源的时域长度；
Figure PCTCN2021121502-appb-000013
表示PRS梳状结构的梳齿大小，即每个多少个RB或者RE放置一个PRS RE；
Figure PCTCN2021121502-appb-000014
表示PRS梳状结构的频域偏移，其颗粒度可以是RE或者RB。
具体k’的取值可以参考下面的表1，表1是频率偏移k′的取值示意图,其可以由PRS资源内符号索引号
Figure PCTCN2021121502-appb-000015
和
Figure PCTCN2021121502-appb-000016
来确定。
Figure PCTCN2021121502-appb-000017
表1
为了避免PRS与Sidelink中控制信号，如(Physical Sidelink Control CHannel，PSCCH)以及物理直接链路反馈信道(Physical Sidelink FeedbackChannel,PSFCH)中信号的冲突，用于发送PRS的时频资源包括承载有PSCCH的符号与承载有PSFCH的符号之间的多个连续的符号。
具体地，为了保证定位精度，所述用于发送定位参考信号的时频资源占满Sidelink带宽，以使得Sidelink带宽内每个子载波上均携带有PRS序列的一个值。Sidelink带宽可以是指用于Sidelink传输的资源的带宽。
相应地，定位参考信号资源的起始符号根据所述直连通信传输资源的起始符号以及PSCCH所占用的符号确定。本发明实施例可以使得LTE定位协议(LTE Positioning Protocol，简称LPP)无需为PRS资源配置时隙内起始符号，而是可以根据直连通信传输资源的起始符号以及PSCCH所占用的符号来确定。例如，PRS资源所占据的时域资源与一起调度的PSSCH的时域资源相同。
其中，所述定位参考信号序列的起始符号是指定位参考信号序列所占用时频资源的起始符号。
本发明实施例通过在直连通信中引入PRS的映射方案，使得PRS 能够在终端之间顺利传输，进而能够实现在直连通信上的定位研究。
在一个具体的实施例中，如果所述直连通信传输资源的起始符号承载有PSCCH，则确定PSCCH所占用的符号之后的首个符号为所述定位参考信号序列的起始符号，否则确定所述直连通信传输资源的起始符号为所述定位参考信号序列的起始符号。
具体请参照图2，Sidelink传输资源的一个子信道(subchannel)上可以包括N个资源块，N为可配置的数值。Sidelink传输资源可以承载PSCCH和PSFCH。在映射PRS序列时，可以将PRS序列映射在承载PSCCH和PSFCH之间的符号上。具体可参照图2中一个子信道内传输资源的映射位置图，其中，S-PRS表示Sidelink中的PRS，S-PRS资源所占用的资源元素的符号位于PSCCH和PSFCH所占用的资源元素的符号之间，并且S-PRS资源占用的资源元素占满Sidelink整个子信道。
在另一个例子中，请参照图3，与图2中不同的是，直连通信传输资源的起始符号(SL-start symbol)承载有PSCCH的情况下，PRS序列所占用的起始符号为PSCCH所占用的符号之后的首个符号，否则，PRS序列所占用的起始符号为直连通信传输资源的起始符号SL-start symbol。
在一个非限制性的实施例中，图1所示步骤S102可以包括以下步骤：如果单个子信道中物理资源块的数量大于预设门限，则将所述定位参考信号序列映射在PSCCH所占用的子信道中。
本实施例中，PRS与PSCCH可以时分复用，也即占用同一子信道，此时需要要求单个子信道中物理资源块的数量大于预设门限，以保证定位精度。
可以理解的是，预设门限的具体数值可以根据实际的应用场景进行配置，本发明实施例对此不作限制。
在一个非限制性的实施例中，所述用于发送定位参考信号的时频 资源不包括PSCCH、PSFCH以及解调参考信号所占用的资源元素。
本实施例中，用于发送PRS的时频资源与PSCCH、PSFCH以及解调参考信号所占用的资源元素不冲突，也就是说，如果资源元素中承载有PSCCH、PSFCH以及解调参考信号(Demodulation Reference Signal,DMRS)，则不在这些资源元素上映射PRS序列。
在本发明一个非限制性的实施例中，图1所示步骤S101可以包括以下步骤：基于上层配置参数，采用第一算法计算所述定位参考信号伪随机序列的初始值；根据所述初始值生成所述定位参考信号序列；其中，所述第一算法采用以下公式表示：
Figure PCTCN2021121502-appb-000018
c init表示所述初始值，
Figure PCTCN2021121502-appb-000019
表示一个无线帧中的时隙索引，l表示所述定位参考信号序列映射到的时隙中OFDM符号的索引，
Figure PCTCN2021121502-appb-000020
为基站参数。
根据所述初始值生成所述定位参考信号序列的计算公式如下：
Figure PCTCN2021121502-appb-000021
其中，
Figure PCTCN2021121502-appb-000022
表示定位参考信号序列，c(i)为由伪随机序列初始值c init产生的第一伪随机序列。
本实施例中初始值的计算原理可参照信道状态信息(Channel State Information,CSI)参考信号的计算方式，本发明实施例在此不再赘述。
进一步而言，所述基站参数为Uu高层信令配置的参数、PC5高层信令配置的参数、第一阶段SCI的CRC校验位的低N位比特，N为预设值。或者，所述基站参数由所述直连通信中源设备标识与目的设备标识决定。例如，所述基站参数由直连通信中源设备标识的低P 位与目的设备标识的低Q位构成，P和Q为预设值。
在一个具体的例子中，N为10。则所述基站参数为第一阶段SCI的CRC校验位的低10位比特。
在另一个具体的例子中，P＝Q＝5，所述基站参数为所述直连通信中源设备标识(Source ID)的低5位比特与目的设备标识(Destination ID)的低5位比特。
在本发明一个非限制性的实施例中，图1所示步骤S101可以包括以下步骤：基于上层配置参数，采用第三算法计算所述定位参考信号伪随机序列c(i)的初始值；根据所述初始值生成所述定位参考信号序列；其中，所述第三算法采用以下公式表示：
Figure PCTCN2021121502-appb-000023
，c init表示所述初始值，
Figure PCTCN2021121502-appb-000024
表示一个无线帧中的时隙索引，l表示所述定参考信号序列映射到的时隙中OFDM符号的索引，
Figure PCTCN2021121502-appb-000025
为基站配置的高层参数，K为整数。
具体实施中，K的取值可以是1024或者其他正整数。
本实施例中初始值的计算原理可参照NR Uu定位参考信号的计算方式，本发明实施例在此不再赘述。
请参照图4，本发明实施例还公开了一种定位参考信号的传输装置，定位参考信号的传输装置40可以包括：
序列计算模块401，用于确定定位参考信号序列；
映射模块402，用于将所述定位参考信号序列映射到用于发送定位参考信号的时频资源上，所述时频资源包括承载有PSCCH的符号与承载有PSFCH的符号之间的多个连续的符号，其中，所述定位参考信号序列的起始符号根据所述直连通信传输资源的起始符号以及PSCCH所占用的符号确定；
序列发送模块403，用于在所述时频资源上发送所述定位参考信号序列。
本发明实施例通过在直连通信中引入PRS的映射方案，使得PRS能够在终端之间顺利传输，进而能够实现在直连通信上的定位研究。
关于所述定位参考信号的传输装置40的工作原理、工作方式的更多内容，可以参照图1至图3中的相关描述，这里不再赘述。
在具体实施中，上述定位参考信号的传输装置可以对应于终端设备中具有定位参考信号的传输功能的芯片，例如SOC(System-On-a-Chip，片上系统)、基带芯片等；或者对应于终端设备中包括具有定位参考信号的传输功能的芯片模组；或者对应于具有数据处理功能芯片的芯片模组，或者对应于终端设备。
关于上述实施例中描述的各个装置、产品包含的各个模块/单元，其可以是软件模块/单元，也可以是硬件模块/单元，或者也可以部分是软件模块/单元，部分是硬件模块/单元。例如，对于应用于或集成于芯片的各个装置、产品，其包含的各个模块/单元可以都采用电路等硬件的方式实现，或者，至少部分模块/单元可以采用软件程序的方式实现，该软件程序运行于芯片内部集成的处理器，剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现；对于应用于或集成于芯片模组的各个装置、产品，其包含的各个模块/单元可以都采用电路等硬件的方式实现，不同的模块/单元可以位于芯片模组的同一组件(例如芯片、电路模块等)或者不同组件中，或者，至少部分模块/单元可以采用软件程序的方式实现，该软件程序运行于芯片模组内部集成的处理器，剩余的(如果有)部分模块/单元可以采用电 路等硬件方式实现；对于应用于或集成于终端的各个装置、产品，其包含的各个模块/单元可以都采用电路等硬件的方式实现，不同的模块/单元可以位于终端内同一组件(例如，芯片、电路模块等)或者不同组件中，或者，至少部分模块/单元可以采用软件程序的方式实现，该软件程序运行于终端内部集成的处理器，剩余的(如果有)部分模块/单元可以采用电路等硬件方式实现。
本发明实施例还公开了一种存储介质，所述存储介质为计算机可读存储介质，其上存储有计算机程序，所述计算机程序运行时可以执行图1中所示的定位参考信号的传输方法的步骤。所述存储介质可以包括ROM、RAM、磁盘或光盘等。所述存储介质还可以包括非挥发性存储器(non-volatile)或者非瞬态(non-transitory)存储器等。
本发明实施例还公开了一种终端，所述终端可以包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机程序。所述处理器运行所述计算机程序时可以执行图1中所示的定位参考信号的传输方法的步骤。所述终端包括但不限于手机、计算机、平板电脑等终端设备。
应理解，上述的处理器可以是通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，还可以是系统芯片(system on chip，SoC)，还可以是中央处理器(central processor unit，CPU)，还可以是网络处理器(network processor，NP)，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为 硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
还应理解，本发明实施例中提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)集成在处理器中。应注意，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行， 取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。

Claims (10)

  1. 一种定位参考信号的传输方法，用于直连通信，其特征在于，包括：
    确定定位参考信号序列；
    将所述定位参考信号序列映射到用于发送定位参考信号的时频资源上，所述时频资源包括承载有PSCCH的符号与承载有PSFCH的符号之间的多个连续的符号，其中，所述定位参考信号序列的起始符号根据所述直连通信传输资源的起始符号以及PSCCH所占用的符号确定；
    在所述时频资源上发送所述定位参考信号序列。
  2. 根据权利要求1所述的定位参考信号的传输方法，其特征在于，所述将所述定位参考信号序列映射到目标时隙内的目标符号上包括：
    如果单个子信道中物理资源块的数量大于预设门限，则将所述定位参考信号序列映射在PSCCH所占用的子信道中。
  3. 根据权利要求1所述的定位参考信号的传输方法，其特征在于，所述用于发送定位参考信号的时频资源不包括PSCCH、PSFCH以及解调参考信号所占用的资源元素。
  4. 根据权利要求1所述的定位参考信号的传输方法，其特征在于，如果所述直连通信传输资源的起始符号承载有PSCCH，则确定PSCCH所占用的符号之后的首个符号为所述定位参考信号序列的起始符号，否则确定所述直连通信传输资源的起始符号为所述定位参考信号序列的起始符号。
  5. 根据权利要求1所述的定位参考信号的传输方法，其特征在于，所述确定定位参考信号序列包括：
    基于上层配置参数，采用第一算法计算所述定位参考信号伪随机 序列的初始值；
    根据所述初始值生成所述定位参考信号序列；
    其中，所述第一算法采用以下公式表示：
    Figure PCTCN2021121502-appb-100001
    c init表示所述初始值，
    Figure PCTCN2021121502-appb-100002
    表示单个时隙内的符号数量，
    Figure PCTCN2021121502-appb-100003
    表示一个无线帧中的时隙索引，l表示所述定位参考信号序列映射到的时隙中OFDM符号的索引，
    Figure PCTCN2021121502-appb-100004
    为基站参数。
  6. 根据权利要求1所述的定位参考信号的传输方法，其特征在于，所述确定定位参考信号序列包括：
    基于上层配置参数，采用第三算法计算所述定位参考信号伪随机序列的初始值；
    根据所述初始值生成所述定位参考信号序列；
    其中，所述第三算法采用以下公式表示：
    Figure PCTCN2021121502-appb-100005
    ，c init表示所述初始值，
    Figure PCTCN2021121502-appb-100006
    表示单个时隙内的符号数量，
    Figure PCTCN2021121502-appb-100007
    表示一个无线帧中的时隙索引，l表示所述定位参考信号序列映射到的时隙中OFDM符号的索引，
    Figure PCTCN2021121502-appb-100008
    为基站配置的高层参数，K为预设整数。
  7. 根据权利要求5或6所述的定位参考信号的传输方法，其特征在于，所述基站参数为Uu高层信令配置的参数、PC5高层信令配置的参数、第一阶段SCI的CRC校验位的低N位比特或者由所述直连通信中源设备标识与目的设备标识确定，N为预设值。
  8. 一种定位参考信号的传输装置，用于直连通信，其特征在于，包 括：
    序列计算模块，用于确定定位参考信号序列；
    映射模块，用于将所述定位参考信号序列映射到用于发送定位参考信号的时频资源上，所述时频资源包括承载有PSCCH的符号与承载有PSFCH的符号之间的多个连续的符号，其中，所述定位参考信号序列的起始符号根据所述直连通信传输资源的起始符号以及PSCCH所占用的符号确定；
    序列发送模块，用于在所述时频资源上发送所述定位参考信号序列。
  9. 一种存储介质，其上存储有计算机程序，其特征在于，所述计算机程序被处理器运行时执行权利要求1至7中任一项所述定位参考信号的传输方法的步骤。
  10. 一种终端，包括存储器和处理器，所述存储器上存储有可在所述处理器上运行的计算机程序，其特征在于，所述处理器运行所述计算机程序时执行权利要求1至7中任一项所述定位参考信号的传输方法的步骤。
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