WO2023143002A1 - 一种直连链路定位同步方法、装置、通信设备和存储介质 - Google Patents

一种直连链路定位同步方法、装置、通信设备和存储介质 Download PDF

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Publication number
WO2023143002A1
WO2023143002A1 PCT/CN2023/071316 CN2023071316W WO2023143002A1 WO 2023143002 A1 WO2023143002 A1 WO 2023143002A1 CN 2023071316 W CN2023071316 W CN 2023071316W WO 2023143002 A1 WO2023143002 A1 WO 2023143002A1
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Prior art keywords
terminal
slss
direct link
psbch
service request
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PCT/CN2023/071316
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English (en)
French (fr)
Inventor
张静文
纪鹏宇
张嘉真
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中国移动通信有限公司研究院
中国移动通信集团有限公司
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Publication of WO2023143002A1 publication Critical patent/WO2023143002A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • 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
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast

Definitions

  • the present application relates to the technical field of communication, and in particular to a direct link location synchronization method, device, communication device and storage medium.
  • V2X Vehicle to Everything
  • V2X Vehicle to Everything
  • SLSS direct link synchronization signal
  • SideLink Synchronization Signal a direct link synchronization signal
  • Embodiments of the present application are expected to provide a direct link positioning synchronization method, device, communication device, and storage medium.
  • the embodiment of the present application provides a direct link positioning synchronization method, the method including:
  • the first terminal sends SLSS/Physical Sidelink Broadcast Channel (PSBCH, Physical Sidelink Broadcast Channel) transmission:
  • PSBCH Physical Sidelink Broadcast Channel
  • the first terminal has a location service request
  • the SLSS/PSBCH transmission is used for other terminals to search and select a reference synchronization source, and the reference synchronization source is used for direct link communication.
  • the method before the first terminal sends SLSS/PSBCH transmission, the method further includes:
  • the first terminal determines the identifier of the SLSS, determines the time domain resource of the SLSS, and generates the SLSS based on the identifier of the SLSS.
  • the method when the first terminal is configured or preconfigured to send SLSS/PSBCH transmission, the method further includes:
  • the first terminal configures or pre-configures first information, where the first information includes at least one of the following: reference synchronization source indication information, time division duplex (TDD, Time Division Duplexing) configuration information, and timing offset compensation information.
  • first information includes at least one of the following: reference synchronization source indication information, time division duplex (TDD, Time Division Duplexing) configuration information, and timing offset compensation information.
  • the method when the first terminal has a location service request, the method further includes: configuring or pre-configuring TDD configuration information in the first terminal.
  • the first terminal when the first terminal has a location service request, the first terminal determines the identity of the SLSS, including:
  • the high layer of the first terminal indicates the identity of the SLSS.
  • the SLSS when the first terminal has a location service request, includes the identifier of the first terminal.
  • the method before the first terminal sends SLSS/PSBCH transmission, the method further includes:
  • the first terminal determines the identity of the SLSS, and determines the time domain resource of the SLSS, and generates the SLSS based on the identity of the SLSS and/or the identity of the first terminal.
  • the method further includes: receiving, by the first terminal, the first information sent by a network device.
  • the PSBCH carries the TDD configuration information.
  • the embodiment of the present application also provides a direct link location synchronization method, the method comprising:
  • the second terminal searches for candidate SLSS/PSBCH transmissions
  • the second terminal has a location service request, or the second terminal receives a location service request.
  • the method also includes:
  • the second terminal When the second terminal detects that the physical layer direct link broadcast channel-reference signal received power (PSBCH-RSRP) corresponding to at least one candidate SLSS exceeds the minimum requirement, the second terminal Select a terminal as the reference synchronization source in the order of priority;
  • PSBCH-RSRP physical layer direct link broadcast channel-reference signal received power
  • the PSBCH-RSRP corresponding to the reference synchronization source in the same priority group is the largest.
  • the SLSS when the second terminal receives the location service request, the SLSS includes the identifier of the terminal.
  • the embodiment of the present application also provides a direct link positioning synchronization device, the device is applied to the first terminal; the device includes: a first processing unit and a first communication unit; wherein,
  • the first processing unit is configured to judge whether a condition is met, and trigger the first communication unit when at least one of the following conditions is met: the first terminal has a location service request; configured or pre-configured to send SLSS/PSBCH transmission;
  • the first communication unit is configured to send SLSS/PSBCH transmission; the SLSS/PSBCH transmission is used for other terminals to search and select a reference synchronization source, and the reference synchronization source is used for direct link communication.
  • the embodiment of the present application also provides a direct link location synchronization device, the device is applied to a second terminal; the device includes: a second communication unit configured to search for candidate SLSS/PSBCH transmissions;
  • the second terminal has a location service request, or the second terminal receives a location service request through the second communication unit.
  • the embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the method described in the first aspect or the second aspect of the embodiment of the present application are implemented .
  • the embodiment of the present application also provides a communication device, including a memory, a processor, and a computer program stored in the memory and operable on the processor.
  • a communication device including a memory, a processor, and a computer program stored in the memory and operable on the processor.
  • the processor executes the program, the implementation of the present application is implemented. For example, the steps of the method described in the first aspect or the second aspect.
  • the direct link positioning synchronization method, device, communication device, and storage medium provided in the embodiments of the present application, the method includes: when at least one of the following conditions is met, the first terminal sends an SLSS/PSBCH transmission: the first terminal has Location service request; configure or preconfigure the first terminal to send SLSS/PSBCH transmission; the SLSS/PSBCH transmission is used for other terminals to search and select a reference synchronization source, and the reference synchronization source is used for direct link communication.
  • the first terminal in the case of configuring or pre-configuring SLSS/PSBCH transmission, the first terminal sends SLSS/PSBCH transmission, so that other terminals search for SLSS/PSBCH and based on the searched SLSS/PSBCH Select a reference synchronization source; on the other hand, when the first terminal has a location request (that is, the first terminal is a terminal to be positioned and has a positioning requirement), the first terminal sends SLSS/PSBCH transmission, so that other terminals that assist in positioning Search and select the reference synchronization source, so as to realize various transmission conditions of SLSS/PSBCH transmission, and enable the terminals communicating with each other to synchronize to each other.
  • a location request that is, the first terminal is a terminal to be positioned and has a positioning requirement
  • FIG. 1 is a first schematic flow diagram of a direct link location synchronization method according to an embodiment of the present application
  • FIG. 2 is a second schematic flow diagram of a direct link location synchronization method according to an embodiment of the present application
  • FIG. 3 is a first schematic diagram of the composition and structure of the direct link positioning synchronization device according to the embodiment of the present application;
  • FIG. 4 is a second schematic diagram of the composition and structure of the direct link positioning synchronization device according to the embodiment of the present application.
  • FIG. 5 is a schematic diagram of a hardware composition structure of a communication device according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • LTE Long Term Evolution
  • 5G system etc.
  • the 5G system or the 5G network may also be called a New Radio (NR, New Radio) system or an NR network.
  • NR New Radio
  • the communication system to which the embodiment of the present application is applied may include a network device and a terminal device (also referred to as a terminal, a communication terminal, etc.); the network device may be a device that communicates with the terminal device. Wherein, the network device can provide communication coverage within a certain area, and can communicate with terminals located in the area.
  • the network device may be a base station in each communication system, such as an evolved base station (eNB, Evolutional Node B) in an LTE system, or a base station (gNB) in a 5G system or an NR system.
  • eNB evolved base station
  • gNB base station
  • Communication equipment may include network equipment and terminals with communication functions, and the network equipment and terminal equipment may be the specific equipment described above, which will not be repeated here; communication equipment may also include other equipment in the communication system, such as network controllers , mobility management entity and other network entities, which are not limited in this embodiment of the present application.
  • the positioning principle based on the air interface is that the terminal to be positioned transmits reference signals between multiple base stations to obtain measurement data such as timing information or angles, and performs positioning based on the measurement data obtained from multiple base stations.
  • the uplink and downlink timing of each terminal is synchronized to the serving base station; and for the base station, it uses the Global Positioning System (GPS, Global Positioning System) to obtain timing (that is, has the same synchronization source), that is, each terminal participating in positioning Parties (such as terminals, serving base stations, neighboring base stations, positioning servers, etc.) have a consistent understanding of timing.
  • GPS Global Positioning System
  • the direct link synchronization mechanism is different from the air interface positioning.
  • the direct link (sidelink) supports multiple types of synchronization sources, such as Global Navigation Satellite System (GNSS, Global Navigation Satellite System), cell (cell) equipment (such as base station), reference user equipment (reference UE, reference User Equipment ) and so on, the terminal can obtain timing information from any synchronization source.
  • sidelink currently supports two synchronization priority types, GNSS-based synchronization and gNB/eNB-based synchronization.
  • the synchronization priority type of a terminal's direct link is determined by the network (pre)configured.
  • the two synchronization priorities define different priorities for each synchronization source, as shown in Table 1 below. Taking GNSS-based synchronization priority as an example, GNSS itself has the highest priority P0, when a terminal can directly synchronize to GNSS, its synchronization priority is P1, and so on.
  • GNSS-based synchronization Synchronization based on gNB/eNB P0 GNSS gNB/eNB P1 UE syncs directly to GNSS UE directly synchronizes to gNB/eNB P2 UE indirect synchronization to GNSS UE indirect synchronization to gNB/eNB P3 gNB/eNB GNSS P4 UE directly synchronizes to gNB/eNB UE syncs directly to GNSS P5 UE indirect synchronization to gNB/eNB UE indirect synchronization to GNSS P6 Other UE(Any other UE) Other UE(Any other UE) Other UE(Any other UE)
  • SLSS direct link synchronization signal
  • FIG. 1 is a schematic flow diagram of a method for positioning and synchronizing a direct link in an embodiment of the present application; as shown in Fig. 1 , the method includes:
  • Step 101 When at least one of the following conditions is met, the first terminal sends SLSS/PSBCH transmission:
  • the first terminal has a location service request
  • the SLSS/PSBCH transmission is used for other terminals to search and select a reference synchronization source, and the reference synchronization source is used for direct link communication.
  • the first terminal in the case of configuring or pre-configuring SLSS/PSBCH transmission, the first terminal sends SLSS/PSBCH transmission, so that other terminals search for SLSS/PSBCH and select a reference synchronization source based on the searched SLSS/PSBCH ;
  • the first terminal when the first terminal has a location request (that is, the first terminal has a positioning requirement as a terminal to be positioned), the first terminal sends SLSS/PSBCH transmission, so that other terminals that assist in positioning search and select a reference
  • the synchronization source realizes various transmission conditions of SLSS/PSBCH transmission, and enables the terminals communicating with each other to synchronize to each other.
  • the SLSS/PSBCH transmission is transmitted through a block.
  • This block can be, for example, a synchronization signal block (SSB).
  • SSB synchronization signal block
  • different time frequencies are defined.
  • the resources correspond to SLSS and PSBCH.
  • the method before the first terminal sends the SLSS/PSBCH transmission, the method further includes: the first terminal determines the identity of the SLSS, and determines the time domain resources of the SLSS, based on The identification of the SLSS generates the SLSS.
  • the first terminal determines the SLSS identifier (SLSS ID) according to configured or preconfigured rules.
  • the configured or pre-configured rules may include a mapping relationship between a trigger condition, a synchronization source (or a reference synchronization source), and an SLSS identifier. Then the first terminal can determine the corresponding SLSS identifier (SLSS ID) according to the currently satisfied trigger condition and the current synchronization source (or reference synchronization source) of the first terminal.
  • the first terminal may also determine the time domain resources of the SLSS according to configured or preconfigured rules.
  • the configured or pre-configured rules may include a trigger condition, a synchronization source (or a reference synchronization source) and a mapping relationship between time domain resources of the SLSS. Then the first terminal may determine the corresponding SLSS time domain resource according to the currently satisfied trigger condition and the current synchronization source (or reference synchronization source) of the first terminal.
  • the time domain resource of the SLSS may specifically be an SLSS time slot (SLSS slot).
  • the first terminal may generate the SLSS based on the SLSS identifier (SLSS ID).
  • the seed generation method may be initialized based on the SLSS sequence and the PSBCH demodulation reference signal (DMRS, Demodulation Reference Signal) sequence to generate the SLSS.
  • DMRS PSBCH demodulation reference signal
  • the method when the first terminal is configured or preconfigured to send SLSS/PSBCH transmission, the method further includes: the first terminal configures or preconfigures first information, so The first information includes at least one of the following: reference synchronization source indication information, TDD configuration information, and timing offset compensation information.
  • the reference synchronization source indicated by the reference synchronization source indication information may be GNSS or a cell; for example, a cell as a reference synchronization source means that a serving base station (such as gNB/eNB) is used as a reference synchronization source .
  • a serving base station such as gNB/eNB
  • the timing offset compensation information corresponds to the first terminal, that is, in the case of configuring or pre-configuring the first information transmitted by SLSS/PSBCH, each terminal (including the first terminal) configures or pre-configures
  • the configured timing offset compensation information may be the same or different.
  • each terminal including the first terminal
  • the first information transmitted by SLSS/PSBCH is configured or pre-configured
  • the reference synchronization source indicated in the configured first information is the same
  • by configuring or pre-configuring the timing offset compensation information corresponding to each terminal (including the first terminal) will make each terminal (including the first terminal) are determined to have the same reference synchronization source.
  • the two parties communicating with each other may not necessarily be synchronized to each other, and may be synchronized to different synchronization sources. Therefore, there will be a problem of timing out of synchronization, and it is difficult to apply the arrival time difference (TDOA, Time Difference of Arrival) and other positioning technologies that require timing synchronization.
  • TDOA Arrival Time Difference of Arrival
  • the TDOA positioning method includes: multiple road test units (RSU, Road Side Unit) send a direct link (sidelink) positioning reference signal, and the terminal to be positioned on the vehicle measures the positioning reference signal between two RSUs Time difference of arrival for positioning.
  • RSU road test units
  • sidelink direct link
  • multiple RSUs may be synchronized to different synchronization sources, and it is difficult to achieve timing synchronization with each other.
  • timing offset compensation information other terminals (terminals to be positioned) can determine that each terminal (including the first terminal) has the same reference synchronization source, so that the problem of timing out-of-synchronization can be solved.
  • the TDD configuration information is used to determine available time domain resources of a direct link (sidelink).
  • the PSBCH carries the TDD configuration information.
  • the available time domain resources of the direct link are derived from the uplink resources in the TDD configuration. If the terminal can access the network (the terminal has a Uu port and is in-coverage (in-coverage)), it can obtain the complete TDD configuration of the network configuration; otherwise, the terminal can only follow the pre-configured TDD configuration, or synchronize to the reference.
  • the terminal (reference UE) obtains the TDD configuration by reading the SLSS/PSBCH sent by the reference terminal.
  • the TDD configuration indication granularity is limited (for a large subcarrier spacing, TDD In the case of a long period, the indicating granularity can be 2slots, 4slots, 8slots), so the indicated TDD configuration may be inconsistent with the actual TDD configuration of the network configuration. For example, there are 11 uplink (UL) time slots (slots) in the TDD configuration of a specific cell (cell-specific), and the PSBCH indication granularity is 4 slots, then the terminal synchronized to the reference UE (reference UE) can only read Up to 8 UL slots. This will affect the inconsistency in the understanding of the available resources of the direct link (sidelink) between the terminal and the reference terminal, resulting in that the two terminals cannot measure each other.
  • the TDD configuration information is a TDD configuration that both receiving and transmitting terminals have a consistent understanding of, for example, the TDD configuration information matches the PSBCH indication granularity , so that the terminal can have a consistent understanding of the available resources (TDD configuration) of the direct link (sidelink).
  • the method further includes: receiving, by the first terminal, the first information sent by a network device.
  • the first terminal before the first terminal sends the SLSS/PSBCH transmission, the first terminal receives the first information sent by the network device, and the first terminal receives the first information according to the reference synchronization source indicated by the first information At least one of indication information, TDD configuration information and timing offset compensation information is used to send SLSS/PSBCH transmission.
  • determining the SLSS identifier by the first terminal includes: an upper layer of the first terminal indicating the SLSS identifier.
  • a higher layer of the first terminal may indicate the identity of the SLSS.
  • the higher layer (higher layer) may be an application layer.
  • the first terminal has a location service request, which may specifically be that the first terminal sends a positioning request.
  • the positioning request sent by the first terminal may be sent in a broadcast manner, or may be sent in a unicast or multicast manner.
  • the first terminal when it sends a location request, it sends the SLSS identifier, that is, the SLSS identifier is sent to other terminals (terminals that assist in positioning) through the location request, so that other terminals (terminals that assist in positioning)
  • the terminal determines according to the identifier of the searched SLSS that the searched SLSS/PSBCH is sent by the first terminal with a location request.
  • the first terminal when the first terminal has a location service request, the first terminal may also determine the SLSS identifier (SLSS ID) according to configured or preconfigured rules, and determine the SLSS ID according to configured or preconfigured rules.
  • the configuration rules determine the time-domain resources of the SLSS. For specific determination methods, refer to the foregoing embodiments, which will not be repeated here.
  • the SLSS when the first terminal has a location service request, includes the identifier of the first terminal.
  • the identity of the first terminal is carried in the SLSS, so that other terminals (terminals assisting in positioning) can synchronize to the first terminal (terminal to be positioned) according to the identity of the first terminal.
  • the method before the first terminal sends the SLSS/PSBCH transmission, the method further includes: the first terminal determines the identity of the SLSS, and determines the time domain resources of the SLSS, based on The identifier of the SLSS and/or the identifier of the first terminal generates the SLSS.
  • CRC Cyclic Redundancy Check
  • the first terminal can determine the identity of the SLSS and determine the time-domain resources of the SLSS according to any of the methods for determining the identity of the SLSS described above; further, the SLSS can be generated based on the identity of the first terminal, or based on The identification of the SLSS and the identification of the first terminal generate the SLSS, or the first terminal can also generate the SLSS only according to the identification of the SLSS, for example, based on the SLSS sequence and the PSBCH DMRS sequence initialization seed generation method, and generate the SLSS.
  • the method when the first terminal has a location service request, the method further includes: configuring or pre-configuring TDD configuration information in the first terminal.
  • the PSBCH carries configured or preconfigured TDD configuration information.
  • the first terminal configures or pre-configures TDD configuration information, where the TDD configuration information is used to determine available time domain resources for a direct link (sidelink).
  • the first terminal when the first terminal has a location service request and before the first terminal sends the SLSS/PSBCH transmission, it can receive the TDD configuration information sent by the network device, and then when sending the SLSS/PSBCH transmission, the PSBCH bearer configuration information Or pre-configured TDD configuration information.
  • the TDD configuration information is a TDD configuration that both the transmitting and receiving terminals have a consistent understanding of. ) unanimous understanding.
  • the above configuration or preconfiguration rules may refer to Table 2.
  • Table 2 for example, under the first trigger condition, that is, the first terminal is within the coverage (In-coverage), and/or, broadcast message (sib12) or dedicated signaling (dedicated signaling) configuration at this time
  • the terminal is used for SLSS/PSBCH transmission
  • the SLSS ID is 0
  • the synchronization source is Cell
  • the SLSS ID is one of ⁇ 1,...,335 ⁇
  • the SLSS slot (slot) is TimeAllocation1.
  • the SLSS ID is 0, and the SLSS slot (slot) is TimeAllocation3, and in the case of configuration (if configured), if not configured, the SLSS slot (slot) is TimeAllocation1.
  • the SLSS ID is the reference direct link SSID (Ref SL SSID) (that is, the SSID of the reference terminal), and the SLSS time slot is TimeAllocation1or2, which is different from the reference terminal (different from Ref UE).
  • the SLSS ID is the reference direct connection
  • the link SSID (Ref SL SSID) that is, the SSID of the reference terminal
  • the SLSS time slot is TimeAllocation1or2, which is different from the reference terminal (different from Ref UE).
  • the synchronization source is a reference terminal (ReferenceUE) and the SLSS time slot of the reference terminal is TimeAllocation3
  • the SLSS ID is 337
  • the SLSS time slot is TimeAllocation2.
  • the SLSS ID is the reference direct link SSID+336 (Ref SL SSID+336) (that is, the SSID+336 of the reference terminal), and the SLSS time slot is TimeAllocation1 or 2, which are different at the reference terminal (different from Ref UE).
  • the SLSS ID is one of ⁇ 338,...,671 ⁇ , and the SLSS time slot is TimeAllocation1 or 2.
  • FIG. 2 is a second schematic flow diagram of a direct link location synchronization method according to an embodiment of the present application; as shown in FIG. 2 , the method includes:
  • Step 201 The second terminal searches for candidate SLSS/PSBCH transmissions; wherein, the second terminal has a location service request, or the second terminal receives a location service request.
  • the second terminal is equivalent to other terminals in the foregoing embodiments.
  • the second terminal receives the location service request Specifically, it may be that the location service request sent by the first terminal is received, that is, the second terminal serves as a terminal for assisting positioning; when the second terminal has a location service request, that is, the second terminal is a terminal to be positioned, then the first The terminal configures or pre-configures the first information transmitted by the SLSS/PSBCH, and the first terminal serves as a positioning-assisted terminal.
  • the method also includes:
  • Step 202 When the second terminal detects that the PSBCH-Reference Signal Receiving Power (RSRP, Reference Signal Receiving Power) corresponding to at least one candidate SLSS exceeds the minimum requirement, the second terminal according to the terminal corresponding to the candidate SLSS The priority order selects a terminal as the reference synchronization source; wherein, the PSBCH-RSRP corresponding to the reference synchronization source in the same priority group is the largest.
  • RSRP Reference Signal Receiving Power
  • the second terminal searches for each candidate SLSS/PSBCH transmission, and if the PSBCH-RSRP corresponding to at least one candidate SLSS exceeds the minimum requirement, the second terminal selects based on the priority order of the terminal corresponding to at least one candidate SLSS
  • One terminal acts as a reference synchronization source.
  • the selected reference synchronization source corresponds to the highest priority; if the number of terminals with the highest priority is at least two, select the terminal with the largest corresponding PSBCH-RSRP from at least two terminals with the highest priority as a reference synchronization source.
  • the PSBCH-RSRP exceeding a minimum requirement may specifically mean that the PSBCH-RSRP exceeds a preset threshold.
  • the SLSS when the second terminal receives the location service request, the SLSS includes the identifier of the terminal.
  • the first terminal is configured or pre-configured for SLSS/PSBCH transmission as an example.
  • the first terminal is used as a terminal for assisting positioning, and other terminals (such as the second terminal) are terminals with location service requests.
  • the first The terminal can receive location service requests from other terminals (such as the second terminal).
  • the first terminal configures or preconfigures SLSS/PSBCH transmission, and the first terminal configures or preconfigures first information; wherein, the first information includes reference synchronization source indication information, TDD configuration information, and timing offset compensation information.
  • the first terminal determines the SLSS ID and the time domain resource (such as sl-SSB-TimeAllocationPos1) of the SLSS according to the above configuration or pre-configured rules, the first terminal generates the SLSS based on the SLSS ID, and sends the SLSS/PSBCH transmission.
  • the time domain resource such as sl-SSB-TimeAllocationPos1
  • each candidate SLSS/PSBCH transmission may be sent by each first terminal configured or pre-configured for SLSS/PSBCH transmission.
  • the second terminal When the second terminal detects that the PSBCH-RSRP corresponding to at least one candidate SLSS exceeds the minimum requirement, the second terminal selects a terminal as a reference synchronization source according to the priority order of the terminals corresponding to the candidate SLSS;
  • the PSBCH-RSRP corresponding to the reference synchronization source in the same priority group is the largest.
  • the first terminal has a location service request as an example.
  • the first terminal is the terminal to be positioned, and other terminals (such as the second terminal) are terminals that receive the location service request.
  • the first terminal When the first terminal has a location service request, it sends SLSS/PSBCH transmission.
  • the SLSS may include the identifier of the first terminal.
  • the first terminal can determine the SLSS ID and determine the time domain resource (such as sl-SSB-TimeAllocationPos2) of the SLSS according to the above configuration or preconfigured rules, and the first terminal generates the SLSS based on the SLSS ID.
  • the first terminal may generate the SLSS based on the SLSS ID and the identifier of the first terminal, or the first terminal may generate the SLSS based on the identifier of the first terminal.
  • the higher layer of the first terminal indicates the SLSS ID, and determines the time domain resources of the SLSS according to the above configured or preconfigured rules, and the first terminal generates the SLSS based on the SLSS ID.
  • the second terminal as an auxiliary positioning terminal searches for candidate SLSS/PSBCH transmissions, and each candidate SLSS/PSBCH transmission may be sent by each first terminal.
  • the second terminal When the second terminal detects that the PSBCH-RSRP corresponding to at least one candidate SLSS exceeds the minimum requirement, the second terminal selects a terminal as a reference synchronization source according to the priority order of the terminals corresponding to the candidate SLSS;
  • the PSBCH-RSRP corresponding to the reference synchronization source in the same priority group is the largest.
  • an embodiment of the present application further provides a device for positioning and synchronizing a direct link, which is applied to a first terminal.
  • Fig. 3 is a schematic diagram of the composition and structure of a direct link positioning synchronization device according to an embodiment of the present application; as shown in Fig. 3 , the device includes: a first processing unit 31 and a first communication unit 32; wherein,
  • the first processing unit 31 is configured to judge whether a condition is met, and trigger the first communication unit 32 when at least one of the following conditions is met: the first terminal has a location service request; configured or pre-configured to send SLSS/PSBCH transmission;
  • the first communication unit 32 is configured to send SLSS/PSBCH transmission; the SLSS/PSBCH transmission is used for other terminals to search and select a reference synchronization source, and the reference synchronization source is used for direct link communication.
  • the first processing unit 31 is further configured to determine the identity of the SLSS and determine the time domain resources of the SLSS before the first communication unit 32 sends the SLSS/PSBCH transmission , generating an SLSS based on the identifier of the SLSS.
  • the first processing unit 31 in the case of configuring or pre-configuring to send SLSS/PSBCH transmission, is further configured to configure or pre-configure first information, and the first information includes At least one of the following: reference synchronization source indication information, TDD configuration information, and timing offset compensation information.
  • the first communication unit 32 is further configured to receive the first information sent by a network device.
  • the PSBCH carries the TDD configuration information.
  • the first processing unit 31 when the first terminal has a location service request, is further configured to configure or pre-configure TDD configuration information.
  • the first processing unit 31 when the first terminal has a location service request, is configured to indicate the identity of the SLSS through a high layer of the first terminal.
  • the SLSS when the first terminal has a location service request, includes the identifier of the first terminal.
  • the first processing unit 31 is configured to determine the identifier of the SLSS and determine the time domain resource of the SLSS before the first communication unit 32 sends the SLSS/PSBCH transmission, Generate the SLSS based on the identifier of the SLSS and/or the identifier of the first terminal.
  • the PSBCH carries the TDD configuration information.
  • the first processing unit 31 in the device can be composed of a central processing unit (CPU, Central Processing Unit), a digital signal processor (DSP, Digital Signal Processor), a micro control unit (MCU) in practical applications. , Microcontroller Unit) or programmable gate array (FPGA, Field-Programmable Gate Array) to realize; the first communication unit 32 in the described device can pass communication module (comprising: basic communication suite, operating system, Communication modules, standardized interfaces and protocols, etc.) and transceiver antennas.
  • CPU Central Processing Unit
  • DSP Digital Signal Processor
  • MCU micro control unit
  • FPGA Field-Programmable Gate Array
  • FIG. 4 is a second schematic diagram of the composition and structure of the direct link positioning synchronization device according to the embodiment of the present application; as shown in FIG. 4 , the device includes: a second communication unit 41 configured to search for candidate SLSS/PSBCH transmissions;
  • the second terminal has a location service request, or the second terminal receives a location service request through the second communication unit 41 .
  • the apparatus further includes a second processing unit 42 configured to, when it is detected that the PSBCH-RSRP corresponding to at least one candidate SLSS exceeds the minimum requirement, according to the The priority order selects a terminal as the reference synchronization source; wherein, the PSBCH-RSRP corresponding to the reference synchronization source in the same priority group is the largest.
  • the SLSS when the second terminal receives a location service request through the second communication unit 41, the SLSS includes an identifier of the terminal.
  • the second processing unit 42 in the device can be implemented by CPU, DSP, MCU or FPGA in practical applications; the second communication unit 41 in the device can be implemented through a communication module in practical applications.
  • Group including: basic communication suite, operating system, communication module, standardized interface and protocol, etc.
  • implementation of transceiver antennas including: basic communication suite, operating system, communication module, standardized interface and protocol, etc.
  • the direct link positioning synchronization device when the direct link positioning synchronization device provided in the above-mentioned embodiments performs direct link positioning synchronization, it only uses the division of the above-mentioned program modules as an example. In practical applications, the above processing can be combined as needed The allocation is done by different program modules, that is, the internal structure of the device is divided into different program modules to complete all or part of the above-described processing.
  • the device for positioning and synchronizing the direct link provided in the above embodiments belongs to the same idea as the method for positioning and synchronizing the direct link. For the specific implementation process, refer to the method embodiment for details and will not be repeated here.
  • embodiments of the present application further provide a communication device, where the communication device is the terminal (such as the first terminal and/or the second terminal) in the foregoing embodiments.
  • FIG. 5 is a schematic diagram of the hardware composition of the communication device according to the embodiment of the present application. As shown in FIG. When the processor 51 executes the program, implements the steps of the direct link location synchronization method applied to the first terminal; or, when the processor 51 executes the program, implements the steps applied to the second terminal The steps of the direct link positioning synchronization method are described.
  • the communication device further includes at least one network interface 53 .
  • various components in the communication device are coupled together through the bus system 54 .
  • the bus system 54 is used to realize connection and communication between these components.
  • the bus system 54 also includes a power bus, a control bus and a status signal bus.
  • the various buses are labeled as bus system 54 in FIG. 5 .
  • the memory 52 may be a volatile memory or a non-volatile memory, and may also include both volatile and non-volatile memories.
  • the non-volatile memory can be read-only memory (ROM, Read Only Memory), programmable read-only memory (PROM, Programmable Read-Only Memory), erasable programmable read-only memory (EPROM, Erasable Programmable Read-Only Memory) Only Memory), Electrically Erasable Programmable Read-Only Memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), Magnetic Random Access Memory (FRAM, Ferromagnetic Random Access Memory), Flash Memory (Flash Memory), Magnetic Surface Memory , CD, or CD-ROM (Compact Disc Read-Only Memory); magnetic surface storage can be disk storage or tape storage.
  • the volatile memory may be random access memory (RAM, Random Access Memory), which is used as an external cache.
  • RAM random access memory
  • RAM Random Access Memory
  • many forms of RAM are available such as Static Random Access Memory (SRAM, Static Random Access Memory), Synchronous Static Random Access Memory (SSRAM, Synchronous Static Random Access Memory), Dynamic Random Access Memory Memory (DRAM, Dynamic Random Access Memory), synchronous dynamic random access memory (SDRAM, Synchronous Dynamic Random Access Memory), double data rate synchronous dynamic random access memory (DDRSDRAM, Double Data Rate Synchronous Dynamic Random Access Memory), enhanced Synchronous Dynamic Random Access Memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), Synchronous Link Dynamic Random Access Memory (SLDRAM, SyncLink Dynamic Random Access Memory), Direct Memory Bus Random Access Memory (DRRAM, Direct Rambus Random Access Memory ).
  • the memory 52 described in the embodiments of the present application is intended to include, but not be limited to, these and any other suitable types of memory.
  • the methods disclosed in the foregoing embodiments of the present application may be applied to the processor 51 or implemented by the processor 51 .
  • the processor 51 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor 51 or instructions in the form of software.
  • the aforementioned processor 51 may be a general-purpose processor, DSP, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like.
  • the processor 51 may implement or execute various methods, steps, and logic block diagrams disclosed in the embodiments of the present application.
  • a general purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a storage medium, and the storage medium is located in the memory 52, and the processor 51 reads the information in the memory 52, and completes the steps of the foregoing method in combination with its hardware.
  • the communication device may be implemented by one or more Application Specific Integrated Circuit (ASIC, Application Specific Integrated Circuit), DSP, Programmable Logic Device (PLD, Programmable Logic Device), Complex Programmable Logic Device (CPLD, Complex Programmable Logic Device), FPGA, general-purpose processor, controller, MCU, microprocessor (Microprocessor), or other electronic components are used to implement the aforementioned method.
  • ASIC Application Specific Integrated Circuit
  • DSP Digital Signal Processing Unit
  • PLD Programmable Logic Device
  • CPLD Complex Programmable Logic Device
  • FPGA general-purpose processor
  • controller MCU
  • microprocessor Microprocessor
  • the embodiment of the present application further provides a computer-readable storage medium, such as a memory 52 including a computer program, and the computer program can be executed by the processor 51 of the communication device to complete the steps in the foregoing method.
  • the computer-readable storage medium can be memories such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disk, or CD-ROM; it can also be various devices including one or any combination of the above memories.
  • the computer-readable storage medium provided in the embodiment of the present application stores a computer program thereon, and when the program is executed by a processor, the steps of the method for positioning and synchronizing direct links applied to the first terminal are implemented; or, the program is executed by The processor implements the steps of implementing the direct link positioning synchronization method applied to the second terminal when executing.
  • the disclosed devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division.
  • the coupling, or direct coupling, or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical or other forms of.
  • the units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units; Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application can be integrated into one processing unit, or each unit can be used as a single unit, or two or more units can be integrated into one unit; the above-mentioned integration
  • the unit can be realized in the form of hardware or in the form of hardware plus software functional unit.
  • the above-mentioned integrated units of the present application are realized in the form of software function modules and sold or used as independent products, they can also be stored in a computer-readable storage medium.
  • the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium and includes several instructions for Make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: various media capable of storing program codes such as removable storage devices, ROM, RAM, magnetic disks or optical disks.

Abstract

本申请实施例公开了一种直连链路定位同步方法、装置、通信设备和存储介质。所述方法包括：当至少满足如下条件之一时，第一终端发送直连链路同步信号(SLSS)/物理层直连链路广播信道(PSBCH)传输：所述第一终端有位置服务请求；配置或预配置所述第一终端发送SLSS/PSBCH传输；所述SLSS/PSBCH传输用于其他终端搜索并选择参考同步源，所述参考同步源用于直连链路通信。

Description

一种直连链路定位同步方法、装置、通信设备和存储介质
相关申请的交叉引用
本申请基于申请号为202210114466.9、申请日为2022年01月30日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此以引入方式并入本申请。
技术领域
本申请涉及通信技术领域，具体涉及一种直连链路定位同步方法、装置、通信设备和存储介质。
背景技术
在车联网(V2X，Vehicle to Everything)场景中，考虑无网络覆盖的场景(如车辆驶入隧道、自然灾害基础设施受损等)下的定位以及相对位置定位，需要使能直连链路(sidelink)定位。如果使能直连链路定位，目前并非所有的终端都会发送直连链路同步信号(SLSS，SideLink Synchronization Signal)，而是在满足一定条件时才会发送SLSS，这样，互相通信的终端并不一定会同步到对方。
发明内容
本申请实施例期望提供一种直连链路定位同步方法、装置、通信设备和存储介质。
本申请实施例的技术方案是这样实现的：
第一方面，本申请实施例提供了一种直连链路定位同步方法，所述方法包括：
当至少满足如下条件之一时，第一终端发送SLSS/物理层直连链路广播信道(PSBCH，Physical Sidelink Broadcast Channel)传输：
所述第一终端有位置服务请求；
配置或预配置所述第一终端发送SLSS/PSBCH传输；
所述SLSS/PSBCH传输用于其他终端搜索并选择参考同步源，所述参考同步源用于直连链路通信。
在本申请的一些可选实施例中，所述第一终端发送SLSS/PSBCH传输之前，所述方法还包括：
所述第一终端确定SLSS的标识，以及确定所述SLSS的时域资源，基于所述SLSS的标识生成SLSS。
在本申请的一些可选实施例中，在配置或预配置所述第一终端发送SLSS/PSBCH传输的情况下，所述方法还包括：
所述第一终端配置或预配置第一信息，所述第一信息包括以下至少之一：参考同步源指示信息、时分双工(TDD，Time Division Duplexing)配置信息、定时偏移补偿信息。
在本申请的一些可选实施例中，在所述第一终端有位置服务请求的情况下，所述方法还包括：所述第一终端中配置或预配置TDD配置信息。
在本申请的一些可选实施例中，在所述第一终端有位置服务请求的情况下，所述第一终端确定SLSS的标识，包括：
所述第一终端的高层指示SLSS的标识。
在本申请的一些可选实施例中，在所述第一终端有位置服务请求的情况下，所述SLSS中包括所述第一终端的标识。
在本申请的一些可选实施例中，所述第一终端发送SLSS/PSBCH传输之前，所述方法还包括：
所述第一终端确定SLSS的标识，以及确定所述SLSS的时域资源，基 于所述SLSS的标识和/或所述第一终端的标识生成SLSS。
在本申请的一些可选实施例中，所述方法还包括：所述第一终端接收网络设备发送的所述第一信息。
在本申请的一些可选实施例中，所述PSBCH承载所述TDD配置信息。
第二方面，本申请实施例还提供了一种直连链路定位同步方法，所述方法包括：
第二终端搜索候选SLSS/PSBCH传输；
所述第二终端有位置服务请求，或者所述第二终端接收到位置服务请求。
在本申请的一些可选实施例中，所述方法还包括：
在所述第二终端检测到至少一个候选SLSS对应的物理层直连链路广播信道-参考信号接收功率(PSBCH-RSRP)超过最小需求的情况下，所述第二终端根据候选SLSS对应的终端的优先级顺序选择一个终端作为参考同步源；
其中，所述参考同步源在相同优先级组中对应的PSBCH-RSRP最大。
在本申请的一些可选实施例中，在所述第二终端接收到位置服务请求的情况下，所述SLSS中包括终端的标识。
第三方面，本申请实施例还提供了一种直连链路定位同步装置，所述装置应用于第一终端中；所述装置包括：第一处理单元和第一通信单元；其中，
所述第一处理单元，配置为判断是否满足条件，当至少满足如下条件之一时，触发所述第一通信单元：所述第一终端有位置服务请求；配置或预配置发送SLSS/PSBCH传输；
所述第一通信单元，配置为发送SLSS/PSBCH传输；所述SLSS/PSBCH传输用于其他终端搜索并选择参考同步源，所述参考同步源用于直连链路 通信。
第四方面，本申请实施例还提供了一种直连链路定位同步装置，所述装置应用于第二终端中；所述装置包括：第二通信单元，配置为搜索候选SLSS/PSBCH传输；
所述第二终端有位置服务请求，或者所述第二终端通过所述第二通信单元接收到位置服务请求。
第五方面，本申请实施例还提供了一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现本申请实施例第一方面或第二方面所述方法的步骤。
第六方面，本申请实施例还提供了一种通信设备，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述程序时实现本申请实施例第一方面或第二方面所述方法的步骤。
本申请实施例提供的直连链路定位同步方法、装置、通信设备和存储介质，所述方法包括：当至少满足如下条件之一时，第一终端发送SLSS/PSBCH传输：所述第一终端有位置服务请求；配置或预配置所述第一终端发送SLSS/PSBCH传输；所述SLSS/PSBCH传输用于其他终端搜索并选择参考同步源，所述参考同步源用于直连链路通信。采用本申请实施例的技术方案，一方面，在配置或预配置SLSS/PSBCH传输的情况下，第一终端发送SLSS/PSBCH传输，以使其他终端搜索SLSS/PSBCH并基于搜索到的SLSS/PSBCH选择参考同步源；另一方面，在第一终端有位置请求(即第一终端作为待定位终端，有定位需求)的情况下，由第一终端发送SLSS/PSBCH传输，使得辅助定位的其他终端搜索并选择参考同步源，从而实现了SLSS/PSBCH传输的多种发送条件，并且能够使互相通信的终端同步到对方。
附图说明
图1为本申请实施例的直连链路定位同步方法的流程示意图一；
图2为本申请实施例的直连链路定位同步方法的流程示意图二；
图3为本申请实施例的直连链路定位同步装置的组成结构示意图一；
图4为本申请实施例的直连链路定位同步装置的组成结构示意图二；
图5为本申请实施例的通信设备的硬件组成结构示意图。
具体实施方式
下面结合附图及具体实施例对本申请作进一步详细的说明。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(GSM，Global System of Mobile communication)系统、长期演进(LTE，Long Term Evolution)系统或5G系统等。可选地，5G系统或5G网络还可以称为新无线(NR，New Radio)系统或NR网络。
示例性的，本申请实施例应用的通信系统可包括网络设备和终端设备(也可称为终端、通信终端等等)；网络设备可以是与终端设备通信的设备。其中，网络设备可以为一定区域范围内提供通信覆盖，并且可以与位于该区域内的终端进行通信。可选地，网络设备可以是各通信系统中的基站，例如LTE系统中的演进型基站(eNB，Evolutional Node B)，又例如5G系统或NR系统中的基站(gNB)。
应理解，本申请实施例中网络/系统中具有通信功能的设备可称为通信设备。通信设备可包括具有通信功能的网络设备和终端，网络设备和终端设备可以为上文所述的具体设备，此处不再赘述；通信设备还可包括通信系统中的其他设备，例如网络控制器、移动管理实体等其他网络实体，本申请实施例中对此不做限定。
应理解，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在 三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例例如能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
在对本申请实施例的直连链路定位同步方案进行说明之前，首先对直连链路同步机制进行简单说明。
基于空口的定位原理是，待定位终端与多个基站间传输参考信号，以获得定时信息或角度等测量数据，基于从多个基站获得的测量数据进行定位。在这种情况下，各终端的上下行定时均同步到服务基站；而对于基站，其利用全球定位系统(GPS，Global Positioning System)获得授时(即具有相同的同步源)，即参与定位的各方(如终端、服务基站、邻基站、定位服务器等)对定时有一致的理解。
直连链路同步机制与空口定位不同。直连链路(sidelink)支持多种类型的同步源，例如包括全球导航卫星系统(GNSS，Global Navigation Satellite System)、小区(cell)设备(如基站)，参考用户设备(reference UE，reference User Equipment)等等，终端可以从任一同步源获得定时信息。此外，目前sidelink支持两种同步优先级类型，基于GNSS(GNSS-based)的同步和基于gNB/eNB(gNB/eNB-based)的同步，某个终端的直连链路同步优先级类 型由网络(预)配置。两种同步优先级对各同步源的优先级定义不同，如下表1所示。以GNSS-based同步优先级为例，GNSS自身具备最高优先级P0，当一个终端能直接同步到GNSS时，其同步优先级为P1，以此类推。
表1
优先级 基于GNSS的同步 基于gNB/eNB的同步
P0 GNSS gNB/eNB
P1 UE直接同步到GNSS UE直接同步到gNB/eNB
P2 UE间接同步到GNSS UE间接同步到gNB/eNB
P3 gNB/eNB GNSS
P4 UE直接同步到gNB/eNB UE直接同步到GNSS
P5 UE间接同步到gNB/eNB UE间接同步到GNSS
P6 其他UE(Any other UE) 其他UE(Any other UE)
另外，目前对直连链路同步信号(SLSS)的发送触发条件和发送规则进行了详细的规定，并不是所有终端都会发送SLSS，当且仅当满足了规定的一系列条件时，终端才会发送SLSS。
本申请实施例提供了一种直连链路定位同步方法，应用于第一终端。图1为本申请实施例的直连链路定位同步方法的流程示意图一；如图1所示，所述方法包括：
步骤101：当至少满足如下条件之一时，第一终端发送SLSS/PSBCH传输：
所述第一终端有位置服务请求；
配置或预配置所述第一终端发送SLSS/PSBCH；
所述SLSS/PSBCH传输用于其他终端搜索并选择参考同步源，所述参考同步源用于直连链路通信。
本实施例中，一方面，在配置或预配置SLSS/PSBCH传输的情况下， 第一终端发送SLSS/PSBCH传输，以使其他终端搜索SLSS/PSBCH并基于搜索到的SLSS/PSBCH选择参考同步源；另一方面，在第一终端有位置请求(即第一终端作为待定位终端，有定位需求)的情况下，由第一终端发送SLSS/PSBCH传输，使得辅助定位的其他终端搜索并选择参考同步源，从而实现了SLSS/PSBCH传输的多种发送条件，并且能够使互相通信的终端同步到对方。
本实施例中，示例性的，SLSS/PSBCH传输是通过一个块(block)进行传输的，这个块例如可以是同步信号块(SSB)，在这个块(block)中，定义了不同的时频资源对应于SLSS和PSBCH。
在本申请的一些可选实施例中，所述第一终端发送SLSS/PSBCH传输之前，所述方法还包括：所述第一终端确定SLSS的标识，以及确定所述SLSS的时域资源，基于所述SLSS的标识生成SLSS。
本实施例中，第一终端按照配置或预配置的规则，确定SLSS的标识(SLSS ID)。示例性的，所述配置或预配置的规则可包括触发条件、同步源(或参考同步源)以及SLSS的标识的映射关系。则第一终端可根据当前满足的触发条件以及第一终端当前的同步源(或参考同步源)确定对应的SLSS的标识(SLSS ID)。
相应的，第一终端也可按照配置或预配置的规则，确定所述SLSS的时域资源。示例性的，所述配置或预配置的规则可包括触发条件、同步源(或参考同步源)以及SLSS的时域资源的映射关系。则第一终端可根据当前满足的触发条件以及第一终端当前的同步源(或参考同步源)确定对应的SLSS的时域资源。其中，所述SLSS的时域资源具体可以是SLSS时隙(SLSS slot)。
本实施例中，第一终端可基于SLSS的标识(SLSS ID)生成SLSS。示例性的，可基于SLSS序列和PSBCH解调参考信号(DMRS，Demodulation  Reference Signal)序列初始化种子生成方式，生成SLSS。
在本申请的一些可选实施例中，在配置或预配置所述第一终端发送SLSS/PSBCH传输的情况下，所述方法还包括：所述第一终端配置或预配置第一信息，所述第一信息包括以下至少之一：参考同步源指示信息、TDD配置信息、定时偏移补偿信息。
在一些可选实施例中，所述参考同步源指示信息所指示的参考同步源可以是GNSS或cell等；示例性的，cell作为参考同步源表示服务基站(例如gNB/eNB)作为参考同步源。
本实施例中，所述定时偏移补偿信息是对应于第一终端的，也即在配置或预配置SLSS/PSBCH传输的第一信息的情况下，各终端(包括第一终端)配置或预配置的定时偏移补偿信息可相同或者不同。由于各终端(包括第一终端)的所在位置有所不同，因此在各终端(包括第一终端)作为辅助定位的终端，配置或预配置SLSS/PSBCH传输的第一信息的情况下，并且在所配置的第一信息中指示的参考同步源相同的情况下，通过配置或预配置与各终端(包括第一终端)对应的定时偏移补偿信息，使得其他终端(待定位终端)将各终端(包括第一终端)认定具有相同的参考同步源。
在目前直连链路(sidelink)技术中，互相通信的双方并不一定会同步到对方，且互相之间可能同步到不同的同步源，因此会出现定时不同步的问题，难以适用到达时间差(TDOA，Time Difference of Arrival)等需要定时同步的定位技术。
示例性的，TDOA定位方式包括：多个路测单元(RSU，Road Side Unit)发送直连链路(sidelink)定位参考信号，设置在车辆上的待定位终端测量两两RSU间的定位参考信号到达时间差进行定位。根据直连链路(sidelink)同步机制，多个RSU可能同步到不同的同步源，互相之间难以做到定时同步。
而本实施方式中，通过定时偏移补偿信息，使得其他终端(待定位终端)将各终端(包括第一终端)认定具有相同的参考同步源，从而能够解决定时不同步的问题。
本实施例中，所述TDD配置信息用于确定直连链路(sidelink)可用的时域资源。
在一些可选实施例中，所述PSBCH承载所述TDD配置信息。
目前，直连链路(sidelink)可用的时域资源由TDD配置中的上行资源推导得出。如果终端能够接入网络(终端有Uu口且处于覆盖范围内(in-coverage))，则可以获得网络配置的完整的TDD配置；否则，终端仅能遵循预配置的TDD配置，或同步到参考终端(reference UE)，通过读取参考终端所发送的SLSS/PSBCH获取TDD配置。以通过读取参考终端(reference UE)所发送的SLSS/PSBCH获取TDD配置为例，受限于PSBCH的有效载荷(payload)，其TDD配置指示颗粒度受限(对于子载波间隔较大，TDD周期较长的情况，指示颗粒度可以为2slots、4slots、8slots)，因此其所指示的TDD配置可能与网络配置的实际TDD配置不一致。比如，特定小区(cell-specific)的TDD配置中有11个上行链路(UL)时隙(slots)，而PSBCH指示颗粒度为4slots，则同步到参考终端(reference UE)的终端仅能读到8个UL slots。这样会影响终端与参考终端之间对直连链路(sidelink)的可用资源的理解不一致，导致两个终端之间无法互相测量。
而本申请实施例中，通过配置或预配置SLSS/PSBCH传输的TDD配置信息，所述TDD配置信息是收发终端都有一致理解的TDD配置，例如，所述TDD配置信息与PSBCH指示颗粒度匹配，从而能够实现终端对直连链路(sidelink)的可用资源(TDD配置)的一致理解。
在一些可选实施例中，所述方法还包括：所述第一终端接收网络设备发送的所述第一信息。
本实施例中，在所述第一终端发送SLSS/PSBCH传输之前，所述第一终端接收网络设备发送的所述第一信息，所述第一终端根据所述第一信息指示的参考同步源指示信息、TDD配置信息和定时偏移补偿信息中的至少一种信息，发送SLSS/PSBCH传输。
在本申请的一些可选实施例中，在所述第一终端有位置服务请求的情况下，所述第一终端确定SLSS的标识，包括：所述第一终端的高层指示SLSS的标识。
本实施例中，在第一终端有位置服务请求的情况下，也即第一终端作为待定位终端的情况下，可由第一终端的高层(higher layer)指示SLSS的标识。示例性的，所述高层(higher layer)可以是应用层。
本实施例中，所述第一终端有位置服务请求，具体可以是所述第一终端发送定位请求。示例性的，所述第一终端发送定位请求，可通过广播的方式发送，也可通过单播或组播的方式发送。
可选地，在所述第一终端发送定位请求时，发送所述SLSS的标识，也即将该SLSS的标识通过定位请求发送给其他终端(辅助定位的终端)，以便于其他终端(辅助定位的终端)在搜索SLSS/PSBCH传输时，根据搜索到的SLSS的标识确定搜索到的SLSS/PSBCH是有定位请求的第一终端发出的。
在另一些可选实施例中，在第一终端有位置服务请求的情况下，所述第一终端也可按照配置或预配置的规则，确定SLSS的标识(SLSS ID)，以及按照配置或预配置的规则，确定所述SLSS的时域资源，具体的确定方式可参照前述实施例中所述，这里不再赘述。
在本申请的一些可选实施例中，在所述第一终端有位置服务请求的情况下，所述SLSS中包括所述第一终端的标识。
本实施例中，在SLSS中承载所述第一终端的标识，从而其他终端(辅 助定位的终端)可根据第一终端的标识同步到第一终端(待定位的终端)。
相应的，在一些可选实施例中，所述第一终端发送SLSS/PSBCH传输之前，所述方法还包括：所述第一终端确定SLSS的标识，以及确定所述SLSS的时域资源，基于所述SLSS的标识和/或所述第一终端的标识生成SLSS。
例如，待定位终端发送定位请求时所对应的物理直连链路控制信道(PSCCH，Physical Sidelink Control Channel)循环冗余校验(CRC，Cyclic Redundancy Check)校验比特的低10位(PSCCH CRC 10bit LSB)
本实施方式中，第一终端可按照上述任一种的SLSS的标识的确定方式确定SLSS的标识，以及确定SLSS的时域资源；进一步的，可基于第一终端的标识生成SLSS，也可基于SLSS的标识和第一终端的标识生成SLSS，或者第一终端还可仅根据SLSS的标识生成SLSS，例如基于SLSS序列和PSBCH DMRS序列初始化种子生成方式，生成SLSS。
在本申请的一些可选实施例中，在所述第一终端有位置服务请求的情况下，所述方法还包括：所述第一终端中配置或预配置TDD配置信息。
在一些可选实施例中，所述PSBCH承载配置或预配置的TDD配置信息。
本实施例中，第一终端配置或预配置TDD配置信息，所述TDD配置信息用于确定直连链路(sidelink)可用的时域资源。示例性的，在第一终端有位置服务请求时、在第一终端发送SLSS/PSBCH传输之前，可接收网络设备发送的TDD配置信息，进而在发送SLSS/PSBCH传输时，通过所述PSBCH承载配置或预配置的TDD配置信息。其中，所述TDD配置信息是收发终端都有一致理解的TDD配置，例如，所述TDD配置信息与PSBCH指示颗粒度匹配，从而能够实现终端对直连链路(sidelink)的可用资源(TDD配置)的一致理解。
本实施例中，示例性的，上述配置或预配置的规则可参照表2所示。如表2所示，例如，在第一种触发条件下，即第一终端处于覆盖范围内(In-coverage)，和/或，此时广播消息(sib12)或者专用信令(dedicated signaling)配置了此终端进行SLSS/PSBCH传输，在同步源为GNSS时，SLSS ID为0，在同步源为Cell时，SLSS ID为{1,…,335}中选择的一个，SLSS时隙(slot)为TimeAllocation1。
在第二种触发条件下，即第一终端在预配置(Pre-configuration)的情况下，在同步源为GNSS时，SLSS ID为0，SLSS时隙(slot)为TimeAllocation3，在配置的情况下(if configured)，在未配置的情况下，SLSS时隙(slot)为TimeAllocation1。
在第三种触发条件下，即第一终端在上述两种触发条件以外的其他条件的情况下，在同步源为参考终端(ReferenceUE)且该参考终端处于覆盖范围内(inCov＝true)的情况下，SLSS ID为参考直连链路SSID(Ref SL SSID)(即参考终端的SSID)，SLSS时隙为TimeAllocation1or2，不同于参考终端(different from Ref UE)。在同步源为参考终端(ReferenceUE)且该参考终端未处于覆盖范围内(inCov＝false)，且参考终端的SSID为{336,…,671}中的一个的情况下，SLSS ID为参考直连链路SSID(Ref SL SSID)(即参考终端的SSID)，SLSS时隙为TimeAllocation1or2，不同于参考终端(different from Ref UE)。在同步源为参考终端(ReferenceUE)且参考终端的SLSS时隙为TimeAllocation3的情况下，SLSS ID为337，SLSS时隙为TimeAllocation2。在同步源为参考终端(ReferenceUE)的情况下，SLSS ID为参考直连链路SSID+336(Ref SL SSID+336)(即参考终端的SSID+336)，SLSS时隙为TimeAllocation1或2，不同于参考终端(different from Ref UE)。在同步源不是参考终端(No ReferenceUE)的情况下，SLSS ID为{338,…,671}中的一个，SLSS时隙为TimeAllocation1或2。
表2
Figure PCTCN2023071316-appb-000001
Figure PCTCN2023071316-appb-000002
基于上述实施例，本申请实施例还提供了一种直连链路定位同步方法，应用于第二终端。图2为本申请实施例的直连链路定位同步方法的流程示意图二；如图2所示，所述方法包括：
步骤201：第二终端搜索候选SLSS/PSBCH传输；其中，所述第二终端有位置服务请求，或者所述第二终端接收到位置服务请求。
本实施例中，所述第二终端相当于前述实施例中的其他终端，在第一终端有位置服务请求的情况下，即第一终端作为待定位终端，则第二终端接收到位置服务请求，具体可以是接收到第一终端发出的位置服务请求，也即第二终端作为辅助定位的终端；在第二终端有位置服务请求的情况下，即第二终端作为待定位终端，则第一终端配置或预配置SLSS/PSBCH传输的第一信息，则第一终端作为辅助定位的终端。
在本申请的一些可选实施例中，所述方法还包括：
步骤202：在所述第二终端检测到至少一个候选SLSS对应的PSBCH-参考信号接收功率(RSRP，Reference Signal Receiving Power)超过最小需求的情况下，所述第二终端根据候选SLSS对应的终端的优先级顺序选择一个终端作为参考同步源；其中，所述参考同步源在相同优先级组中对应的PSBCH-RSRP最大。
本实施例中，所述第二终端搜索各候选SLSS/PSBCH传输，在搜索到至少一个候选SLSS对应的PSBCH-RSRP超过最小需求的情况下，基于至少一个候选SLSS对应的终端的优先级顺序选择一个终端作为参考同步源。 可选地，所选择的参考同步源对应的优先级最高；若优先级最高的终端的数量为至少两个，则从至少两个具有最高优先级的终端中选择对应的PSBCH-RSRP最大的终端作为参考同步源。
其中，在一种可能的实施方式中，所述PSBCH-RSRP超过最小需求具体可以是PSBCH-RSRP超过预设阈值。
在本申请的一些可选实施例中，在所述第二终端接收到位置服务请求的情况下，所述SLSS中包括终端的标识。
下面结合一些具体的示例对本申请实施例的直连链路定位同步方法进行说明。
示例一
本示例以第一终端配置或预配置SLSS/PSBCH传输为例，则本示例中，第一终端作为辅助定位的终端，而其他终端(如第二终端)为有位置服务请求的终端，第一终端可接收其他终端(如第二终端)的位置服务请求。
第一终端配置或预配置SLSS/PSBCH传输，以及第一终端配置或预配置第一信息；其中，所述第一信息包括参考同步源指示信息、TDD配置信息和定时偏移补偿信息。
第一终端按照上述配置或预配置的规则，确定SLSS ID以及确定所述SLSS的时域资源(如sl-SSB-TimeAllocationPos1)，第一终端基于SLSS ID生成SLSS，发送SLSS/PSBCH传输。
第二终端需要进行定位时，搜索候选SLSS/PSBCH传输，各个候选SLSS/PSBCH传输可以是配置或预配置SLSS/PSBCH传输的各个第一终端发出的。
在所述第二终端检测到至少一个候选SLSS对应的PSBCH-RSRP超过最小需求的情况下，所述第二终端根据候选SLSS对应的终端的优先级顺序选择一个终端作为参考同步源；其中，所述参考同步源在相同优先级组中 对应的PSBCH-RSRP最大。
示例二
本示例以第一终端有位置服务请求为例，则本示例中，第一终端作为待定位终端，其他终端(如第二终端)为接收到位置服务请求的终端。
第一终端有位置服务请求时，发送SLSS/PSBCH传输。其中，可选地，SLSS中可包括第一终端的标识。
作为一种方式，第一终端可按照上述配置或预配置的规则，确定SLSS ID以及确定所述SLSS的时域资源(如sl-SSB-TimeAllocationPos2)，第一终端基于SLSS ID生成SLSS。其中，可选地，第一终端可基于SLSS ID和第一终端的标识生成SLSS，或者第一终端可基于第一终端的标识生成SLSS。
作为另一种方式，第一终端的高层(higher layer)指示SLSS ID，以及根据上述配置或预配置的规则确定所述SLSS的时域资源，第一终端基于SLSS ID生成SLSS。
作为辅助定位终端的第二终端搜索候选SLSS/PSBCH传输，各个候选SLSS/PSBCH传输可以是各个第一终端发出的。
在所述第二终端检测到至少一个候选SLSS对应的PSBCH-RSRP超过最小需求的情况下，所述第二终端根据候选SLSS对应的终端的优先级顺序选择一个终端作为参考同步源；其中，所述参考同步源在相同优先级组中对应的PSBCH-RSRP最大。
基于上述实施例，本申请实施例还提供了一种直连链路定位同步装置，应用于第一终端中。图3为本申请实施例的直连链路定位同步装置的组成结构示意图一；如图3所示，所述装置包括：第一处理单元31和第一通信单元32；其中，
所述第一处理单元31，配置为判断是否满足条件，当至少满足如下条 件之一时，触发所述第一通信单元32：所述第一终端有位置服务请求；配置或预配置发送SLSS/PSBCH传输；
所述第一通信单元32，配置为发送SLSS/PSBCH传输；所述SLSS/PSBCH传输用于其他终端搜索并选择参考同步源，所述参考同步源用于直连链路通信。
在本申请的一些可选实施例中，所述第一处理单元31，还配置为所述第一通信单元32发送SLSS/PSBCH传输之前，确定SLSS的标识，以及确定所述SLSS的时域资源，基于所述SLSS的标识生成SLSS。
在本申请的一些可选实施例中，在配置或预配置发送SLSS/PSBCH传输的情况下，所述第一处理单元31，还配置为配置或预配置第一信息，所述第一信息包括以下至少之一：参考同步源指示信息、TDD配置信息、定时偏移补偿信息。
在本申请的一些可选实施例中，所述第一通信单元32，还配置为接收网络设备发送的所述第一信息。
在本申请的一些可选实施例中，所述PSBCH承载所述TDD配置信息。
在本申请的一些可选实施例中，在所述第一终端有位置服务请求的情况下，所述第一处理单元31，还配置为配置或预配置TDD配置信息。
在本申请的一些可选实施例中，在所述第一终端有位置服务请求的情况下，所述第一处理单元31，配置为通过所述第一终端的高层指示SLSS的标识。
在本申请的一些可选实施例中，在所述第一终端有位置服务请求的情况下，所述SLSS中包括所述第一终端的标识。
在本申请的一些可选实施例中，所述第一处理单元31，配置为所述第一通信单元32发送SLSS/PSBCH传输之前，确定SLSS的标识，以及确定所述SLSS的时域资源，基于所述SLSS的标识和/或所述第一终端的标识生 成SLSS。
在本申请的一些可选实施例中，所述PSBCH承载所述TDD配置信息。
本申请实施例中，所述装置中的第一处理单元31，在实际应用中可由中央处理器(CPU，Central Processing Unit)、数字信号处理器(DSP，Digital Signal Processor)、微控制单元(MCU，Microcontroller Unit)或可编程门阵列(FPGA，Field－Programmable Gate Array)实现；所述装置中的第一通信单元32，在实际应用中可通过通信模组(包含：基础通信套件、操作系统、通信模块、标准化接口和协议等)及收发天线实现。
基于上述实施例，本申请实施例还提供了一种直连链路定位同步装置，应用于第二终端中。图4为本申请实施例的直连链路定位同步装置的组成结构示意图二；如图4所示，所述装置包括：第二通信单元41，配置为搜索候选SLSS/PSBCH传输；
其中，所述第二终端有位置服务请求，或者所述第二终端通过所述第二通信单元41接收到位置服务请求。
在本申请的一些可选实施例中，所述装置还包括第二处理单元42，配置为在检测到至少一个候选SLSS对应的PSBCH-RSRP超过最小需求的情况下，根据候选SLSS对应的终端的优先级顺序选择一个终端作为参考同步源；其中，所述参考同步源在相同优先级组中对应的PSBCH-RSRP最大。
在本申请的一些可选实施例中，在所述第二终端通过所述第二通信单元41接收到位置服务请求的情况下，所述SLSS中包括终端的标识。
本申请实施例中，所述装置中的第二处理单元42，在实际应用中可由CPU、DSP、MCU或FPGA实现；所述装置中的第二通信单元41，在实际应用中可通过通信模组(包含：基础通信套件、操作系统、通信模块、标准化接口和协议等)及收发天线实现。
需要说明的是：上述实施例提供的直连链路定位同步装置在进行直连 链路定位同步时，仅以上述各程序模块的划分进行举例说明，实际应用中，可以根据需要而将上述处理分配由不同的程序模块完成，即将装置的内部结构划分成不同的程序模块，以完成以上描述的全部或者部分处理。另外，上述实施例提供的直连链路定位同步装置与直连链路定位同步方法实施例属于同一构思，其具体实现过程详见方法实施例，这里不再赘述。
基于上述实施例，本申请实施例还提供了一种通信设备，所述通信设备为前述实施例中的终端(如第一终端和/或第二终端)。图5为本申请实施例的通信设备的硬件组成结构示意图，如图5所示，所述通信设备包括存储器52、处理器51及存储在存储器52上并可在处理器51上运行的计算机程序，所述处理器51执行所述程序时实现应用于第一终端的所述直连链路定位同步方法的步骤；或者，所述处理器51执行所述程序时实现应用于第二终端的所述直连链路定位同步方法的步骤。
可选地，通信设备还包括至少一个网络接口53。其中，通信设备中的各个组件通过总线系统54耦合在一起。可理解，总线系统54用于实现这些组件之间的连接通信。总线系统54除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。但是为了清楚说明起见，在图5中将各种总线都标为总线系统54。
可以理解，存储器52可以是易失性存储器或非易失性存储器，也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(ROM，Read Only Memory)、可编程只读存储器(PROM，Programmable Read-Only Memory)、可擦除可编程只读存储器(EPROM，Erasable Programmable Read-Only Memory)、电可擦除可编程只读存储器(EEPROM，Electrically Erasable Programmable Read-Only Memory)、磁性随机存取存储器(FRAM，Ferromagnetic Random Access Memory)、快闪存储器(Flash Memory)、磁表面存储器、光盘、或只读光盘(CD-ROM，Compact Disc  Read-Only Memory)；磁表面存储器可以是磁盘存储器或磁带存储器。易失性存储器可以是随机存取存储器(RAM，Random Access Memory)，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(SRAM，Static Random Access Memory)、同步静态随机存取存储器(SSRAM，Synchronous Static Random Access Memory)、动态随机存取存储器(DRAM，Dynamic Random Access Memory)、同步动态随机存取存储器(SDRAM，Synchronous Dynamic Random Access Memory)、双倍数据速率同步动态随机存取存储器(DDRSDRAM，Double Data Rate Synchronous Dynamic Random Access Memory)、增强型同步动态随机存取存储器(ESDRAM，Enhanced Synchronous Dynamic Random Access Memory)、同步连接动态随机存取存储器(SLDRAM，SyncLink Dynamic Random Access Memory)、直接内存总线随机存取存储器(DRRAM，Direct Rambus Random Access Memory)。本申请实施例描述的存储器52旨在包括但不限于这些和任意其它适合类型的存储器。
上述本申请实施例揭示的方法可以应用于处理器51中，或者由处理器51实现。处理器51可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法的各步骤可以通过处理器51中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器51可以是通用处理器、DSP，或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。处理器51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。软件模块可以位于存储介质中，该存储介质位于存储器52，处理器51读取存储器52中的信息，结合其硬件完成前述方法的步骤。
在示例性实施例中，通信设备可以被一个或多个应用专用集成电路(ASIC，Application Specific Integrated Circuit)、DSP、可编程逻辑器件(PLD，Programmable Logic Device)、复杂可编程逻辑器件(CPLD，Complex Programmable Logic Device)、FPGA、通用处理器、控制器、MCU、微处理器(Microprocessor)、或其他电子元件实现，用于执行前述方法。
在示例性实施例中，本申请实施例还提供了一种计算机可读存储介质，例如包括计算机程序的存储器52，上述计算机程序可由通信设备的处理器51执行，以完成前述方法所述步骤。计算机可读存储介质可以是FRAM、ROM、PROM、EPROM、EEPROM、Flash Memory、磁表面存储器、光盘、或CD-ROM等存储器；也可以是包括上述存储器之一或任意组合的各种设备。
本申请实施例提供的计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现应用于第一终端的所述直连链路定位同步方法的步骤；或者，该程序被处理器执行时实现应用于第二终端的所述直连链路定位同步方法的步骤。
本申请所提供的几个方法实施例中所揭露的方法，在不冲突的情况下可以任意组合，得到新的方法实施例。
本申请所提供的几个产品实施例中所揭露的特征，在不冲突的情况下可以任意组合，得到新的产品实施例。
本申请所提供的几个方法或设备实施例中所揭露的特征，在不冲突的情况下可以任意组合，得到新的方法实施例或设备实施例。
在本申请所提供的几个实施例中，应该理解到，所揭露的设备和方法，可以通过其它的方式实现。以上所描述的设备实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，如：多个单元或组件可以结合，或可以集成到另一个系统， 或一些特征可以忽略，或不执行。另外，所显示或讨论的各组成部分相互之间的耦合、或直接耦合、或通信连接可以是通过一些接口，设备或单元的间接耦合或通信连接，可以是电性的、机械的或其它形式的。
上述作为分离部件说明的单元可以是、或也可以不是物理上分开的，作为单元显示的部件可以是、或也可以不是物理单元，即可以位于一个地方，也可以分布到多个网络单元上；可以根据实际的需要选择其中的部分或全部单元来实现本实施例方案的目的。
另外，在本申请各实施例中的各功能单元可以全部集成在一个处理单元中，也可以是各单元分别单独作为一个单元，也可以两个或两个以上单元集成在一个单元中；上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于一计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：移动存储设备、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
或者，本申请上述集成的单元如果以软件功能模块的形式实现并作为独立的产品销售或使用时，也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，本申请实施例的技术方案本质上或者说对现有技术做出贡献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。而前述的存储介质包括：移动存储设备、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局 限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (16)

  1. 一种直连链路定位同步方法，所述方法包括：
    当至少满足如下条件之一时，第一终端发送直连链路同步信号SLSS/物理层直连链路广播信道PSBCH传输：
    所述第一终端有位置服务请求；
    配置或预配置所述第一终端发送SLSS/PSBCH传输；
    所述SLSS/PSBCH传输用于其他终端搜索并选择参考同步源，所述参考同步源用于直连链路通信。
  2. 根据权利要求1所述的方法，其中，所述第一终端发送SLSS/PSBCH传输之前，所述方法还包括：
    所述第一终端确定SLSS的标识，以及确定所述SLSS的时域资源，基于所述SLSS的标识生成SLSS。
  3. 根据权利要求1所述的方法，其中，在配置或预配置所述第一终端发送SLSS/PSBCH传输的情况下，所述方法还包括：
    所述第一终端配置或预配置第一信息，所述第一信息包括以下至少之一：参考同步源指示信息、时分双工TDD配置信息、定时偏移补偿信息。
  4. 根据权利要求1所述的方法，其中，在所述第一终端有位置服务请求的情况下，所述方法还包括：所述第一终端中配置或预配置TDD配置信息。
  5. 根据权利要求2所述的方法，其中，在所述第一终端有位置服务请求的情况下，所述第一终端确定SLSS的标识，包括：
    所述第一终端的高层指示SLSS的标识。
  6. 根据权利要求1所述的方法，其中，在所述第一终端有位置服务请求的情况下，所述SLSS中包括所述第一终端的标识。
  7. 根据权利要求6所述的方法，其中，所述第一终端发送SLSS/PSBCH 传输之前，所述方法还包括：
    所述第一终端确定SLSS的标识，以及确定所述SLSS的时域资源，基于所述SLSS的标识和/或所述第一终端的标识生成SLSS。
  8. 根据权利要求3所述的方法，其中，所述方法还包括：
    所述第一终端接收网络设备发送的所述第一信息。
  9. 根据权利要求3或4所述的方法，其中，所述PSBCH承载所述TDD配置信息。
  10. 一种直连链路定位同步方法，所述方法包括：
    第二终端搜索候选直连链路同步信号SLSS/物理层直连链路广播信道PSBCH传输；
    所述第二终端有位置服务请求，或者所述第二终端接收到位置服务请求。
  11. 根据权利要求10所述的方法，其中，所述方法还包括：
    在所述第二终端检测到至少一个候选SLSS对应的物理层直连链路广播信道-参考信号接收功率PSBCH-RSRP超过最小需求的情况下，所述第二终端根据候选SLSS对应的终端的优先级顺序选择一个终端作为参考同步源；
    其中，所述参考同步源在相同优先级组中对应的PSBCH-RSRP最大。
  12. 根据权利要求10所述的方法，其中，在所述第二终端接收到位置服务请求的情况下，所述SLSS中包括终端的标识。
  13. 一种直连链路定位同步装置，所述装置应用于第一终端中；所述装置包括：第一处理单元和第一通信单元；其中，
    所述第一处理单元，配置为判断是否满足条件，当至少满足如下条件之一时，触发所述第一通信单元：所述第一终端有位置服务请求；配置或预配置发送直连链路同步信号SLSS/物理层直连链路广播信道PSBCH传 输；
    所述第一通信单元，配置为发送SLSS/PSBCH传输；所述SLSS/PSBCH传输用于其他终端搜索并选择参考同步源，所述参考同步源用于直连链路通信。
  14. 一种直连链路定位同步装置，所述装置应用于第二终端中；所述装置包括：第二通信单元，配置为搜索候选直连链路同步信号SLSS/物理层直连链路广播信道PSBCH传输；
    所述第二终端有位置服务请求，或者所述第二终端通过所述第二通信单元接收到位置服务请求。
  15. 一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现权利要求1至9任一项所述方法的步骤；或者，
    该程序被处理器执行时实现权利要求10至12任一项所述方法的步骤。
  16. 一种通信设备，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述程序时实现权利要求1至9任一项所述方法的步骤；或者，
    所述处理器执行所述程序时实现权利要求10至12任一项所述方法的步骤。
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