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WO2025066569A1 - Procédé et appareil d'envoi de signal de positionnement, et support d'informations - Google Patents

Procédé et appareil d'envoi de signal de positionnement, et support d'informations Download PDF

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Publication number
WO2025066569A1
WO2025066569A1 PCT/CN2024/110500 CN2024110500W WO2025066569A1 WO 2025066569 A1 WO2025066569 A1 WO 2025066569A1 CN 2024110500 W CN2024110500 W CN 2024110500W WO 2025066569 A1 WO2025066569 A1 WO 2025066569A1
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WO
WIPO (PCT)
Prior art keywords
prs
indication information
time
terminal device
sending
Prior art date
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Application number
PCT/CN2024/110500
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English (en)
Chinese (zh)
Inventor
于莹洁
黄甦
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication of WO2025066569A1 publication Critical patent/WO2025066569A1/fr
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink

Definitions

  • the present application relates to the field of communication technology, and in particular to a positioning signal sending method, device and storage medium.
  • NR new radio
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable and low latency communications
  • mMTC massive machine type of communication
  • IOT Internet of things
  • Uplink positioning is that the access network device detects the SRS sent by the terminal device
  • downlink positioning is that the terminal device detects the PRS sent by the access network device
  • uplink and downlink require both the terminal device and the access network device to perform detection.
  • the sending method for the sidelink positioning reference signal is relatively simple, and the sending of the sidelink positioning reference signal is not flexible, resulting in fewer scenarios for Sidelink positioning.
  • the present application provides a positioning signal sending method, device and storage medium, which are used to improve the sending method of sidelink positioning signals so as to flexibly send sidelink positioning reference signals.
  • a positioning signal sending method which is applied to a first terminal device, and the method includes: the first terminal device receives first indication information sent by an access network device, and the first indication information is used to indicate the activation of a sidelink positioning reference signal SL PRS; the first terminal device sends the SL PRS to a second terminal device based on the first indication information.
  • the access network device can send a first indication information to the first terminal device. So that the first terminal device sends the SL PRS to the second terminal device based on the first indication information.
  • This method makes the sending of the SL PRS more flexible, and the terminal can be activated to send the sidelink positioning signal at any time as needed, without relying on a fixed time point or condition.
  • the first terminal device sends a hybrid automatic repeat request confirmation HARQ ACK information corresponding to the first indication information to the access network device.
  • the hybrid automatic repeat request confirmation HARQ ACK information corresponding to the first indication information is sent to the access network device. So that the access network device can timely understand whether the first terminal device has correctly received the first indication information. And in the case that the first terminal device fails to correctly receive the first indication information, the access network device can resend the first indication information to the first terminal device.
  • the first indication information includes at least one of the following: a resource index of SL PRS, an index of a resource pool to which SL PRS belongs, an SL PRS activation indication, a transmission period of SL PRS, a transmission duration of SL PRS, or a first parameter for determining the start time of sending SL PRS.
  • the access network device configures the first indication information and sends it to the first terminal device so that the first terminal device can determine the SL PRS to be sent to the second terminal device.
  • the resource index of the SL PRS is used to indicate the time-frequency resource of the SL PRS sent by the first terminal device to the second terminal device, so that the second terminal device can effectively select and use specific resources to send positioning signals.
  • the resource pool index to which the SL PRS belongs is used to indicate the resource pool to which the SL PRS sent by the first terminal device to the second terminal device belongs, so as to select resources in the resource pool to send the SL PRS according to different scenarios and requirements.
  • the SL PRS activation indication is used to indicate the first terminal device to send the SL PRS to the second terminal device.
  • the information such as the transmission period of the SL PRS, the transmission duration of the SL PRS, and the first parameter used to determine the start time of sending the SL PRS is used to notify the first terminal device of the specific conditions that need to be met in the process of sending the SL PRS to the second terminal device.
  • the first parameter includes a first time offset value or a first time window.
  • the first terminal device can specifically determine the start time of sending SL PRS based on the first parameter.
  • the SL PRS starts sending after the first terminal device receives the first indication information, and is offset by a first time offset value relative to the time when the first terminal device receives the first indication information; or, the SL PRS starts sending after the first terminal device sends the HARQ ACK information corresponding to the first indication information to the access network device, and is offset by the first time offset value relative to the time when the first terminal device sends the HARQ ACK information corresponding to the first indication information to the access network device.
  • the start time of sending the SL PRS is within the first time window after receiving the first indication information; or, the start time of sending the SL PRS is within the first time window after sending the HARQ ACK information corresponding to the first indication information.
  • limiting the end time of SL PRS transmission to the second time window after sending the second indication information or sending the HARQ ACK information corresponding to the second indication information can improve the accuracy of the end time of SL PRS transmission.
  • By constraining the end time of SL PRS transmission it can be ensured that SL PRS is ended within a specific time window, thereby enhancing the accuracy and stability of the positioning algorithm.
  • second indication information is generated, and the second indication information is used to indicate deactivation of SL PRS; the second indication information is sent.
  • FIG9 is a schematic diagram of SL-PRS activation provided in an embodiment of the present application.
  • FIG10 is a flow chart of a positioning signal sending method provided in an embodiment of the present application.
  • FIG11 is a schematic diagram of SL-PRS activation provided in an embodiment of the present application.
  • FIG12 is a schematic diagram of SL-PRS activation provided in an embodiment of the present application.
  • FIG13 is a schematic diagram of the composition of a communication device provided in an embodiment of the present application.
  • FIG. 14 is a schematic diagram of the composition of a communication device provided in an embodiment of the present application.
  • Sidelink communication is a device-to-device (D2D) direct communication technology that allows high-speed, low-latency data transmission between two or more devices without being transferred through a base station or other network nodes.
  • D2D device-to-device
  • This communication method is very useful for applications that require real-time interaction and high-speed data transmission, such as vehicle-to-vehicle (V2V) communication, smart cities, industrial automation and other scenarios.
  • V2V vehicle-to-vehicle
  • the activation method of Sidelink transmission can be to use data control information (DCI) in Type 2 Configured Grant to activate/deactivate.
  • DCI data control information
  • Sidelink transmission is activated or deactivated by configuring some key conditions in DCI format 3_0.
  • some key conditions in DCI format 3_0 include hybrid automatic repeat request (HARQ) process number and frequency resource allocation.
  • HARQ hybrid automatic repeat request
  • Table 1 when the HARQ process number is all 0, it means that Sidelink transmission is activated; when the HARQ process number is all 1, it means that Sidelink transmission is activated; if there is frequency resource allocation, Sidelink transmission can be activated by setting it to all 1.
  • the main reference channels in Sidelink communication are the physical sidelink control channel, PSCCH) is a physical sidelink shared channel (PSSCH) and a physical sidelink feedback channel (PSFCH).
  • PSCCH physical sidelink control channel
  • PSSCH physical sidelink shared channel
  • PSFCH physical sidelink feedback channel
  • Multicast is a communication between one device and a group of devices.
  • Broadcast is a communication between one device and all devices.
  • FIG1 provides a physical layer structure diagram of the sidelink.
  • the PSCCH is mapped from the lowest PRB of the PSSCH, and occupies the same symbol (symbol) as part of the PSSCH but is frequency separated.
  • the PSSCH will occupy the entire frequency domain to send data (DATA) and demodulation reference signal (DMRS). Therefore, in order to ensure uniform power distribution, the symbol-level PSSCH power control scheme is divided into two categories: symbols without PSCCH and symbols with PSCCH.
  • the header of the sidelink time-frequency resources is the automatic gain control technology (AGC), and the tail of the sidelink time-frequency resources is the guard band (GAP).
  • AGC automatic gain control technology
  • GAP guard band
  • Uu positioning is the transmission of positioning reference signals, positioning auxiliary data, positioning measurement results and other information between user equipment (UE) through the universal user network interface (Uu).
  • Uu positioning requires the participation of base stations. It mainly includes uplink positioning, downlink positioning and uplink and downlink positioning.
  • uplink positioning is the base station's detection of the sounding reference signal (SRS) sent by the UE
  • downlink positioning is the UE's detection of the positioning reference signal (PRS) sent by the base station
  • uplink and downlink positioning requires both the UE and the base station to perform detection.
  • SRS sounding reference signal
  • PRS positioning reference signal
  • each sending mode is implemented by configuring the high-level parameter resourceType about the time domain type for the SRS resource set and SRS resource.
  • all parameters of the periodic SRS resource whose time domain type is configured are configured by high-level signaling, and the UE sends periodically according to the configured parameters.
  • All SRS resources in the same SRS resource set have the same periodicity.
  • different subcarrier spacings correspond to different slot lengths, and the period of the periodic SRS resource and the offset within the period are configured in units of time slots.
  • the minimum period that can be configured for the periodic SRS resource is 1 time slot, and the maximum period is 2560 time slots.
  • Non-periodic SRS the time domain type is configured as non-periodic SRS resources activated through DCI signaling. Each time the UE receives an SRS trigger signaling that triggers a non-periodic SRS resource, the UE transmits an SRS corresponding to the triggered SRS resource.
  • the SRS trigger signaling in the DCI contains 2 bits, and the 2 bits can represent 4 states. One of the states indicates that the non-periodic SRS transmission is not triggered, and the other three states respectively indicate the triggering of the first, second, and third SRS resource groups; one state can trigger one or more SRS resource sets, and multiple SRS resource sets corresponding to one state can correspond to multiple carriers.
  • Semi-persistent SRS the time domain type is configured as semi-persistent SRS resources, which are also sent periodically during activation.
  • the difference between it and periodic SRS is that the UE does not send SRS after receiving the high-level signaling configuration about the semi-persistent SRS resources. For example, after receiving the deactivation command of the semi-persistent SRS resources sent by the MAC layer, the UE stops sending SRS.
  • the SRS corresponding to the semi-persistent SRS resources is only sent periodically after receiving the activation signaling sent by the MAC layer about the semi-persistent SRS resources.
  • the configuration, activation and deactivation of semi-persistent SRS resources are faster and more flexible than high-level signaling, and are suitable for fast transmission of services requiring lower latency.
  • the base station configures the period and offset within the period for the semi-persistent SRS resources through high-level signaling, and all SRS resources in the same SRS resource set have the same periodicity.
  • FIG2 is a schematic diagram of a semi-persistent SRS activation provided by the present application.
  • the UE After the media access control element (MAC CE) transmitted by the PDSCH indicates an activation/deactivation instruction, the UE will activate the HARQ-ACK information corresponding to the slot n after the HARQ-ACK information transmitted by the physical uplink control channel (PUCCH). (That is, 3 ⁇ the number of slots in one subframe) Start/stop sending SRS.
  • PUCCH physical uplink control channel
  • S PRS sidelink positioning reference signals
  • two directly connected terminal devices one terminal device sends a positioning reference signal and the other terminal device measures the positioning reference signal, and by calculating the relative distance and angle, the relative position relationship can be obtained.
  • the absolute position can be calculated.
  • the terminal devices send positioning reference signals through the direct communication interface 5 (pose communication 5, PC5) interface, but the positioning auxiliary data, positioning measurement results and other information can be transmitted through the PC5 or Uu interface.
  • the PC port is a direct communication interface, which does not require the participation of the base station.
  • the present application provides a positioning signal transmission method, which defines a semi-persistent sidelink positioning signal transmission method so as to flexibly transmit the sidelink positioning reference signal.
  • the method comprises: a first terminal device receives first indication information sent by a base station, the first indication information is used to indicate the activation of the sidelink positioning reference signal SL PRS; the first terminal device sends the SL PRS to the second terminal device based on the first indication information.
  • the base station can send a first indication information to the first terminal device. So that the first terminal device sends the SL PRS to the second terminal device based on the first indication information.
  • This method makes the sending of SL PRS more flexible, and the terminal can be activated to send the sidelink positioning signal at any time as needed, without relying on a fixed time point or condition.
  • a side link for example, in a terminal device (user equipment, UE) that communicates directly with each other through one or more side link (SL) channels, for example, using a PC5/PC3 interface or WiFi direct.
  • UEs that communicate directly with each other through side links may include vehicle to vehicle (V2V) communications that communicate directly with other vehicles, and vehicle to everything (V2X) communications that communicate with other entities of a wireless communication network, such as roadside units (RSUs), roadside entities such as traffic lights, traffic signs, or pedestrians.
  • the RSU may have the functionality of a base station or a terminal device, depending on the specific network configuration.
  • Other UEs may not be vehicle-related UEs and may include any of the devices mentioned above.
  • Such devices may also communicate directly with each other using SL channels, i.e., D2D communications.
  • both UEs may be served by the same base station, so that the base station may provide sidelink resource allocation configuration or assistance to the UEs.
  • both UEs may be within the coverage area of the base station, which is referred to as an "in-coverage” scenario.
  • One of the two UEs is within the coverage area of the base station and the other is not within the coverage area of the base station, which is referred to as a "partial coverage” scenario.
  • Both UEs are not within the coverage area of the base station, which is referred to as an "out-of-coverage" scenario.
  • Figure 3 is a schematic diagram of an in-coverage scenario provided by an embodiment of the present application, in which two UEs that communicate directly with each other are both connected to a base station.
  • the access network device has a coverage area schematically represented by a circle 300.
  • the UEs that communicate directly with each other include UE 301 and UE 302, both of which are in the coverage area of the access network device.
  • UE 301 and UE 302 are both connected to the access network device, and in addition, they are directly connected to each other via a PC5 interface.
  • Scheduling and/or interference management of traffic between UEs is assisted by the access network device via control signaling on the Uu interface, which is the radio interface between the base station and the UE.
  • the access network device provides SL resource allocation configuration or assistance for the UE, and the access network device assigns resources to be used for communication between UEs on the sidelink.
  • FIG4 is a schematic diagram of a partial coverage scenario provided by an embodiment of the present application, where the access network device has a coverage area schematically represented by a circle 400.
  • UEs that communicate directly with each other include UE 401 in the coverage area of the access network device, and UE 402 that is not in the coverage area of the access network device.
  • UE 401 is connected to the access network device, and UE 402 is not connected to the access network device.
  • UE 401 and UE 402 are directly connected to each other through a PC5 interface.
  • FIG5 is a schematic diagram of an out-of-coverage scenario provided by an embodiment of the present application, where UE 501 and UE 502 are shown to communicate directly with each other via a sidelink, but the two UEs are not connected to a base station, although they may be physically located within the coverage of the base station, or some or all of the two UEs communicating directly with each other are connected to the base station, but the base station does not provide SL resource allocation configuration or assistance.
  • UE 501 and UE 502 can be connected using the PC5 interface.
  • the terminal devices in Figures 3, 4 and 5 can be devices with wireless transceiver functions or chips or chip systems that can be set in the devices, which can allow users to access the network and are devices used to provide voice and/or data connectivity to users.
  • the terminal device can be fixed or movable.
  • the terminal device can also be called user equipment (UE), subscriber unit, terminal or mobile station (MS) or mobile terminal (MT), etc.
  • the terminal devices in Figures 3, 4 and 5 can be cellular phones, smart phones, wireless data cards, mobile phones, personal digital assistants (PDA) computers, tablet computers or computers with wireless transceiver functions, wireless modems, handheld devices (handsets), laptops, etc.
  • the terminal device may also be a VR terminal, an AR terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, a machine type communication (MTC) terminal, a vehicle with vehicle-to-vehicle (V2V) communication capability, an intelligent networked vehicle, a drone with UAV to UAV (U2U) communication capability, etc., without limitation.
  • MTC machine type communication
  • V2V vehicle with vehicle-to-vehicle
  • U2U U2U
  • the access network device in Figures 3, 4 and 5 can be any device deployed in the access network that can communicate wirelessly with the terminal device, or described as an access device that is an access device for the terminal device to access the communication system wirelessly, or a chip or chip system that can be set in the above-mentioned device, mainly used to realize wireless physical control functions, resource scheduling and wireless resource management, wireless access control and mobility management functions.
  • the access network device can also be connected to the core network device in a wireless or wired manner.
  • the access network device can be a device that supports wired access or a device that supports wireless access.
  • the access network device can be an access network (AN)/radio access network (RAN) device, which is composed of multiple AN/RAN nodes.
  • the AN/RAN node may be: an access point (AP), a base station (nodeB, NB), a macro base station, a micro base station (or described as a small station), a pico base station, a balloon station, a relay station, an enhanced base station (enhance nodeB, eNB), a next generation eNB (next generation eNB, ng-eNB), a next generation base station (next generation nodeB, gNB), a base station in a 5G communication system, a base station in a future mobile communication system or an access node in a wireless-fidelity (WiFi) system, a transmission reception point (TRP), a transmission point (TP), a transmission measurement function (TMF), a wearable device, a vehicle-mounted device or some other access node, etc.
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the access network device.
  • the access network equipment may also be of a centralized unit (CU)/distributed unit (DU) architecture, in which case the access network equipment may include two network elements, CU and DU; the access network equipment may also be of a control plane-user plane (CP-UP) architecture, in which case the access network equipment may include three network elements, namely the CU control plane (CU-CP), the CU user plane (CU-UP) and the DU, without restriction.
  • CU-CP CU control plane
  • CU-UP control plane-user plane
  • the access network device and the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface; can also be deployed on aircraft, balloons and satellites in the air.
  • the embodiments of the present application do not limit the application scenarios of the access network device and the terminal device.
  • the access network device and the terminal device, and the terminal device and the terminal device can communicate through the authorized spectrum, and can also communicate through the unlicensed spectrum, or can also communicate through the authorized spectrum and the unlicensed spectrum at the same time.
  • the access network device and the terminal device, and the terminal device and the terminal device can communicate through the spectrum below 6G, and can also communicate through the spectrum above 6G, and can also communicate through the spectrum below 6G and the spectrum above 6G at the same time.
  • the embodiment of the present application does not limit the spectrum resources used between the access network device and the terminal device.
  • terminal equipment and access network equipment in the embodiments of the present application can be one or more chips, or a system on chip (SOC), etc.
  • Figures 3, 4 and 5 are only exemplary figures, and the number of devices included is not limited.
  • the communication system may also include other devices, such as core network equipment, wireless relay equipment and wireless backhaul equipment.
  • the names of each device and each link in Figures 3, 4 and 5 are not limited. In addition to the names shown in Figures 3, 4 and 5, each device and each link can also be named with other names without limitation.
  • each terminal device and access network device may adopt the composition structure shown in FIG6, or include the components shown in FIG6.
  • FIG6 is a schematic diagram of the composition of a communication device 600 provided in an embodiment of the present application.
  • the communication device 600 may be a terminal device or a chip or a system on chip in the terminal device; it may also be an access network device or a chip or a system on chip in the access network device.
  • the communication device 600 includes a processor 601, a transceiver 602 and a communication line 603.
  • the communication device 600 may also include a memory 604.
  • the processor 601, the memory 604 and the transceiver 602 may be connected via a communication line 603.
  • the processor 601 is a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof.
  • the processor 601 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.
  • the transceiver 602 is used to communicate with other devices or other communication networks.
  • the other communication networks may be Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.
  • the transceiver 602 may be a module, a circuit, a transceiver or any device capable of achieving communication.
  • the communication line 603 is used to transmit information between the components included in the communication device 600.
  • the memory 604 is used to store instructions, where the instructions may be computer programs.
  • the memory 604 can be a read-only memory (ROM) or other types of static storage devices that can store static information and/or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and/or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.
  • ROM read-only memory
  • RAM random access memory
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • CD-ROM compact disc read-only memory
  • optical disc storage including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.
  • magnetic disk storage media or other magnetic storage devices etc., without limitation.
  • the memory 604 can exist independently of the processor 601, or can be integrated with the processor 601.
  • the memory 604 can be used to store instructions or program codes or some data, etc.
  • the memory 604 can be located in the communication device 600, or can be located outside the communication device 600, without limitation.
  • the processor 601 is used to execute the instructions stored in the memory 604 to implement the positioning signal sending method provided in the following embodiments of the present application.
  • the processor 601 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 6 .
  • the communication device 600 includes multiple processors.
  • it may also include a processor 607 .
  • the communication device 600 further includes an output device 605 and an input device 606.
  • the input device 606 is a device such as a keyboard, a mouse, a microphone or a joystick
  • the output device 605 is a device such as a display screen and a speaker.
  • the communication device 600 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device having a similar structure as shown in FIG6.
  • the composition structure shown in FIG6 does not constitute a limitation on the communication device.
  • the communication device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.
  • the chip system may be composed of a chip, or may include a chip and other discrete devices.
  • the positioning signal sending method provided in the embodiment of the present application is described with reference to Figure 7 below, wherein the terminal device can be any terminal device in the communication system shown in Figure 3, Figure 4 and Figure 5, and the access network device is any access network device in the communication system where the selected terminal device is located.
  • the terminal devices and access network devices of the following embodiments can all have the components shown in Figure 6.
  • the processing performed by a single execution subject (terminal device or access network device) shown in the embodiment of the present application can also be divided into executions by multiple execution subjects, and these execution subjects can be logically and/or physically separated without restriction.
  • FIG. 7 is a flow chart of a method for sending a positioning signal provided in an embodiment of the present application. As shown in FIG. 7 , the method includes the following steps:
  • An access network device generates first indication information.
  • the first indication information is used to indicate the activation of the side link positioning reference signal SL PRS.
  • Activating SL PRS can also be described as enabling (or using, etc.) SL PRS for positioning.
  • the first indication information includes at least one of the following: a resource index of the SL PRS, an index of a resource pool to which the SL PRS belongs, an SL PRS activation indication, a transmission period of the SL PRS, a transmission duration of the SL PRS, or a first parameter for determining a start time of sending the SL PRS.
  • the first parameter includes a first time offset value or a first time window.
  • the resource pool index to which the SL PRS belongs can be used to determine the resource pool to which the SL PRS sent by the first terminal device to the second terminal device belongs.
  • the resource pool index can be used to identify and distinguish different resource pools, each of which may have different resource allocation strategies, transmission parameters or spectrum configurations, etc. By selecting an appropriate resource pool index, the effective use of SL PRS resources can be ensured and specific positioning requirements can be met.
  • the resource index of the SL PRS may belong to the resource index list of the SL-PRS in the resource pool, and the resource index of the SL PRS is used to determine the resources of the SL PRS that need to be activated among the resources of the SL-PRS in the resource pool to which the SL PRS belongs.
  • the resources of the SL PRS corresponding to the resource index of the SL PRS may be continuous resources or discrete resources.
  • the resource pool and the resource index list of the SL-PRS in the resource pool can be configured by radio resource control (RRC) signaling.
  • RRC radio resource control
  • the time domain/frequency domain resources corresponding to the resource index of each SL-PRS, including Comb value, RE offset, occupied symbol, the PSCCH index corresponding to the resource index of each SL-PRS, and the time domain/frequency domain resources corresponding to the PSCCH index, including the number of symbols, the subchannel index where the PSCCH is located, and the frequency domain position occupied by the PSCCH (such as RB number or RE number) can all be configured by RRC signaling.
  • the first terminal device can report the activation status corresponding to the resource index of all currently configured SL-PRSs through uplink transmission MAC CE, so that the access network device can receive these reporting information, understand the activation status of each SL-PRS resource, and determine whether the SL-PRS resource index is in use or idle. So that the access network device can select appropriate resources for scheduling to other devices according to the reported activation status of the SL-PRS resource index to avoid resource conflicts and interference.
  • the SL PRS activation indication can be used to instruct the first terminal device to enable SL PRS to start positioning.
  • the transmission period of SL PRS can be used to indicate the interval time for the first terminal device to send SL PRS to the second terminal device.
  • the transmission duration of the SL PRS can be used to indicate the duration for the first terminal device to send the SL PRS to the second terminal device.
  • one of the terminal devices when positioning cooperation or location service is required between terminal devices, one of the terminal devices (usually the master terminal device) can send an SL PRS signal, and the other terminal devices (usually the slave terminal devices) can receive the SL PRS and use it for positioning.
  • the terminal device that needs to send the SL PRS signal can send a positioning request of the terminal device to the access network device. After receiving the positioning request of the terminal device, the access network device will generate a first indication information to indicate that the terminal device can activate the SL PRS for positioning between terminal devices.
  • the access network device sends first indication information to the first terminal device.
  • the first terminal device receives the first indication information sent by the access network device.
  • the first terminal device after the first terminal device correctly receives the first indication information sent by the access network device, the first terminal device sends a Hybrid Automatic Repeat Request Acknowledgment (HARQ ACK) information corresponding to the first indication information to the access network device.
  • HARQ ACK Hybrid Automatic Repeat Request Acknowledgment
  • the Hybrid Automatic Repeat Request Acknowledgment HARQ ACK information corresponding to the first indication information is used to notify the access network device that the first terminal device has correctly received the first indication information.
  • the first indication information is carried in the media access control element MAC CE. This makes the transmission of SL PRS more flexible and can be activated and sent at any time as needed without relying on a fixed time point or condition.
  • the access network device may carry the first indication information in the MAC CE and send it to the first terminal device in the physical downlink shared channel (PDSCH).
  • PDSCH physical downlink shared channel
  • the first terminal device sends SL PRS to the second terminal device based on the first indication information.
  • the first terminal device sends the SL PRS to the second terminal device based on the SL PRS resource index, the SL PRS resource pool index, the SL PRS activation indication, the SL PRS transmission period, the SL PRS transmission duration and the first parameter for determining the start time of sending the SL PRS contained in the first indication information.
  • the first terminal device sends the SL PRS to the second terminal device based on the resource index of the SL PRS, the index of the resource pool to which the SL PRS belongs, the SL PRS activation indication, the transmission duration of the SL PRS, and the first parameter for determining the start time of sending the SL PRS contained in the first indication information.
  • the first terminal device can send the SL PRS a preset number of times during the transmission duration of the SL PRS, and the time interval for sending the SL PRS can also be based on a preset time interval or randomly.
  • the preset number of times and the preset time interval can be pre-configured or stored in the first terminal device.
  • the first terminal device sends an SL PRS to the second terminal device once within the transmission duration of the SL PRS after the start time of sending the SL PRS.
  • the first terminal device sends SL PRS to the second terminal device five times within the transmission duration of SL PRS after the start time of sending SL PRS, and the sending interval of SL PRS is 1 second.
  • the first terminal device determines the start time of sending the SL PRS based on the resource index of the SL PRS, the index of the resource pool to which the SL PRS belongs, the SL PRS activation indication, the transmission period of the SL PRS, and the first indication information.
  • a parameter is used to send a SL PRS to the second terminal device. Since the first indication information does not specify the transmission duration of the SL PRS, the first terminal device will continue to send the SL PRS to the second terminal device until it receives the SL PRS deactivation indication; or, the first terminal device sends the SL PRS according to a preset duration.
  • the preset duration can be pre-configured or stored in the first terminal device.
  • the first terminal device sends the SL PRS to the second terminal device based on the SL PRS resource index, the SL PRS activation indication, the SL PRS transmission period, the SL PRS transmission duration, and the first parameter for determining the start time of sending the SL PRS contained in the first indication information.
  • the first terminal device Since the first indication information does not specify the resource pool index to which the SL PRS belongs, the first terminal device will determine the resource pool to which the SL PRS belongs according to a pre-agreed agreement, and may pre-store the SL-PRS resource index list of the pre-agreed resource pool to which the SL PRS belongs in the first terminal device, so as to determine the SL PRS resources to be scheduled based on the SL PRS resource index contained in the first indication information.
  • the first terminal device sends the SL PRS to the second terminal device based on the SL PRS resource pool index, the SL PRS activation indication, the SL PRS transmission period, the SL PRS transmission duration, and the first parameter for determining the start time of sending the SL PRS contained in the first indication information.
  • the first terminal device since the first indication information does not specify the resource index of the SL PRS, the first terminal device will determine the resource index of the SL PRS according to a pre-agreed agreement, or the resource index of the SL PRS can be stored in the first terminal device.
  • the first terminal device sends the SL PRS to the second terminal device based on the SL PRS resource index, the SL PRS resource pool index, the SL PRS activation indication, the SL PRS transmission period, and the SL PRS transmission duration included in the first indication information. Since the first indication information does not include the first parameter for determining the start time of sending the SL PRS, the first terminal can start sending the SL PRS within a preset duration after receiving the first indication information. The preset duration can be predetermined or stored in the first terminal device.
  • the starting time of sending the SL PRS can be determined according to the first parameter.
  • the SL PRS starts sending after the first terminal device receives the first indication information, and is offset by a first time offset value relative to the time when the first terminal device receives the first indication information.
  • the start time of sending the SL PRS is after the first terminal device sends the HARQ ACK information corresponding to the first indication information, and is offset by a first time offset value relative to the time when the first terminal device sends the HARQ ACK information corresponding to the first indication information.
  • the start time of SL PRS transmission is determined according to the transmission time corresponding to the first indication information or the HARQ ACK information corresponding to the first indication information, and the time offset value is added, which can avoid conflicts and interference and improve the efficiency of signal transmission. In this way, signal overlap and competition can be reduced, so that each signal can be correctly received and processed at the appropriate time.
  • the start time of sending SL PRS is within the first time window after the first terminal device receives the first indication information.
  • the start time of sending the SL PRS is located within the first time window after the first terminal device sends the HARQ ACK information corresponding to the first indication information. In this way, by constraining the start time of sending the SL PRS within a specific time window, the accuracy and stability of the positioning algorithm are enhanced.
  • the access network device can send a first indication information to the first terminal device. So that the first terminal device sends the SL PRS to the second terminal device based on the first indication information. This method makes the sending of SL PRS more flexible, and it can be activated and sent at any time as needed, without relying on a fixed time point or condition.
  • the first terminal device stops sending SL PRS to the second terminal device by the transmission duration of SL PRS in the first indication information sent by the access network device to the first terminal device.
  • the access network device sends a second indication information to the first terminal device to stop the first terminal device from sending SL PRS to the second terminal device.
  • An access network device generates second indication information.
  • the second indication information is used to indicate the deactivation of SL PRS.
  • deactivating SL PRS can also be described as deactivating (or deactivating, or stopping using, or canceling, or not using, etc.) SL PRS for positioning.
  • the second indication information includes at least one of the following: a resource index of the SL PRS, an index of a resource pool to which the SL PRS belongs, an index of a resource pool to which the SL PRS belongs, A deactivation indication, or a second parameter for determining the end time of sending the SL PRS, wherein the second parameter includes a second time offset value or a second time window.
  • the resource index to which the SL PRS belongs can be used to determine the resource pool to which the SL PRS that the first terminal device stops sending to the second terminal device belongs.
  • the resource index of the SL PRS can be used to determine the resources of the SL PRS that has stopped sending in the resource pool to which the SL PRS belongs.
  • the first terminal device can report the activation status corresponding to the resource index of all currently configured SL-PRS through uplink transmission MAC CE, so that the access network device can receive these reporting information, understand the activation status of each SL-PRS resource, and determine whether the SL-PRS resource index is in use or idle. So that the access network device can select appropriate resources for scheduling to other devices according to the reported activation status of the SL-PRS resource index to avoid resource conflicts and interference.
  • the SL PRS deactivation indication can be used to instruct the first terminal device to stop using SL PRS positioning.
  • the access network device sends second indication information to the first terminal device.
  • the first terminal device receives the second indication information sent by the access network device.
  • the first terminal device after the first terminal device receives the second indication information sent by the access network device, the first terminal device sends hybrid automatic repeat request confirmation HARQ ACK information corresponding to the second indication information to the access network device.
  • the hybrid automatic repeat request confirmation HARQ ACK information corresponding to the second indication information is used to notify the access network device that the first terminal device has correctly received the second indication information.
  • the second indication information is carried in the MAC CE, which makes the sending of the second indication information more flexible, and the SL PRS can be deactivated and stopped at any time without relying on a fixed time point or condition.
  • the access network device may carry the second indication information in the MAC CE and carry it in the PDSCH to send it to the first terminal device.
  • the first terminal device stops sending SL PRS to the second terminal device.
  • the first terminal device stops sending the SL PRS to the second terminal device based on the resource index of the SL PRS, the resource pool index to which the SL PRS belongs, the SL PRS deactivation indication, and the second parameter for determining the end time of sending the SL PRS contained in the second indication information.
  • the first terminal device stops sending the SL PRS to the second terminal device based on the resource index of the SL PRS, the index of the resource pool to which the SL PRS belongs, and the SL PRS deactivation indication contained in the first indication information. Since the second indication information does not include the second parameter for determining the end time of sending the SL PRS, the first terminal device may stop sending the SL PRS within a preset time after receiving the second indication information. The preset time may be pre-configured or stored in the first terminal device.
  • the resource index of the SL PRS and the index of the resource pool to which the SL PRS belongs can be pre-configured and stored in the first terminal device.
  • the end time of sending the SL PRS can be determined according to the second parameter.
  • the sending end time of the SL PRS is after the first terminal device receives the second indication information, and is offset by a second time offset value relative to the time when the first terminal device receives the second indication information.
  • the end time of sending the SL PRS is within the second time window after the first terminal device receives the second indication information.
  • the SL PRS sending end time is after the first terminal device sends the HARQ ACK information corresponding to the second indication information to the access network device, and is offset by a second time offset value relative to the time when the first terminal device sends the HARQ ACK information corresponding to the second indication information.
  • the access network device can generate second indication information and send the second indication information to the first terminal device, so that the first terminal device stops sending SL PRS to the second terminal device based on the second indication information.
  • the start time of sending the SL PRS is within the first time window after receiving the first indication information; or, the start time of sending the SL PRS is within the first time window after sending the HARQ ACK information corresponding to the first indication information.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande concerne le domaine technique des communications. L'invention concerne un procédé et un appareil d'envoi de signal de positionnement, et un support de stockage, qui sont utilisés pour mettre au point un mode d'envoi d'un signal de positionnement de liaison latérale, de façon à envoyer de manière flexible un signal de référence de positionnement de liaison latérale. Le procédé consiste à : recevoir des premières informations d'indication, les premières informations d'indication étant utilisées pour indiquer l'activation d'un signal de référence de positionnement de liaison latérale (SLPRS) ; et envoyer un SLPRS à un second dispositif terminal sur la base des premières informations d'indication.
PCT/CN2024/110500 2023-09-27 2024-08-07 Procédé et appareil d'envoi de signal de positionnement, et support d'informations Pending WO2025066569A1 (fr)

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CN202311290246.2A CN119729846A (zh) 2023-09-27 2023-09-27 一种定位信号发送方法、装置及存储介质

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