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WO2025025116A1 - Procédé de positionnement sous porteuse partagée - Google Patents

Procédé de positionnement sous porteuse partagée Download PDF

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Publication number
WO2025025116A1
WO2025025116A1 PCT/CN2023/110432 CN2023110432W WO2025025116A1 WO 2025025116 A1 WO2025025116 A1 WO 2025025116A1 CN 2023110432 W CN2023110432 W CN 2023110432W WO 2025025116 A1 WO2025025116 A1 WO 2025025116A1
Authority
WO
WIPO (PCT)
Prior art keywords
positioning
reference signal
wireless communication
combsize
communication method
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2023/110432
Other languages
English (en)
Inventor
Focai Peng
Chuangxin JIANG
Junpeng LOU
Qi Yang
Mengzhen LI
Cong Wang
Zhiqiang Han
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZTE Corp
Original Assignee
ZTE Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZTE Corp filed Critical ZTE Corp
Priority to CN202380089452.9A priority Critical patent/CN120419266A/zh
Priority to PCT/CN2023/110432 priority patent/WO2025025116A1/fr
Priority to KR1020257026779A priority patent/KR20250133772A/ko
Publication of WO2025025116A1 publication Critical patent/WO2025025116A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/0009—Transmission of position information to remote stations
    • G01S5/0072—Transmission between mobile stations, e.g. anti-collision systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0205—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0205—Details
    • G01S5/0236—Assistance data, e.g. base station almanac
    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • 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
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • the disclosure relates generally to wireless communications, including but not limited to systems and methods for positioning.
  • the standardization organization Third Generation Partnership Project (3GPP) is currently in the process of specifying a new Radio Interface called 5G New Radio (5G NR) as well as a Next Generation Packet Core Network (NG-CN or NGC) .
  • the 5G NR will have three main components: a 5G Access Network (5G-AN) , a 5G Core Network (5GC) , and a User Equipment (UE) .
  • 5G-AN 5G Access Network
  • 5GC 5G Core Network
  • UE User Equipment
  • the elements of the 5GC also called Network Functions, have been simplified with some of them being software based, and some being hardware based, so that they could be adapted according to need.
  • example embodiments disclosed herein are directed to solving the issues relating to one or more of the problems presented in the prior art, as well as providing additional features that will become readily apparent by reference to the following detailed description when taken in conjunction with the accompany drawings.
  • example systems, methods, devices and computer program products are disclosed herein. It is understood, however, that these embodiments are presented by way of example and are not limiting, and it will be apparent to those of ordinary skill in the art who read the present disclosure that various modifications to the disclosed embodiments can be made while remaining within the scope of this disclosure.
  • a wireless communication entity e.g., a UE, a radio device
  • the wireless communication entity may send a transmission of the reference signal for positioning.
  • the transmission may include an occupancy signal based on a de-modulation reference signal (DM-RS) of a physical sidelink control channel (PSCCH) that schedules the reference signal for positioning.
  • DM-RS de-modulation reference signal
  • PSCCH physical sidelink control channel
  • the transmission may include an occupancy signal based on an automatic gain control (AGC) symbol that is just before a PSCCH that schedules the reference signal for positioning.
  • the transmission may include an occupancy signal based on a de-modulation reference signal (DM-RS) of a physical downlink control channel (PDCCH) that schedules the reference signal for positioning.
  • DM-RS de-modulation reference signal
  • PDCCH physical downlink control channel
  • the transmission may include an occupancy signal based on an automatic gain control (AGC) symbol that is just before a PSCCH that schedules the reference signal for positioning.
  • the configuration information may indicate that when a time-gap between a successful listen before talk (LBT) /clear channel assessment (CCA) and a pre-defined start time of a PSCCH that schedules the reference signal for positioning is greater or equal to the first wireless communication entity processing capability of AGC, sending the transmission.
  • the transmission may include an occupancy signal copied from an incoming PSCCH symbol.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of the reference signal for positioning is less than CombSize/Q orthogonal frequency division multiplexing (OFDM) symbol (s) , the reference signal for positioning is not sent, where CombSize is a comb size and Q is an integer.
  • CombSize is a comb size and Q is an integer.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of the reference signal for positioning is less than CombSize OFDM symbol (s) , the reference signal for positioning is not sent, where CombSize is a comb size.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of the reference signal for positioning is less than CombSize/Q OFDM symbol (s) plus a duration for AGC, the reference signal for positioning is not sent, where CombSize is a comb size and Q is an integer.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of a PSCCH that schedules the reference signal for positioning is less than CombSize/Q OFDM symbol (s) plus a duration for AGC, the reference signal for positioning is not sent, where CombSize is a comb size and Q is an integer.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of the reference signal for positioning is less than CombSize OFDM symbol (s) plus duration for AGC, the reference signal for positioning is not sent, where CombSize is a comb size.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of a PSCCH that schedule the reference signal for positioning is less than CombSize OFDM symbol (s) plus a duration for AGC, the reference signal for positioning is not sent, where CombSize is a comb size.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of a PSCCH that schedule the reference signal for positioning is less than CombSize OFDM symbol (s) plus a duration for a PSCCH/PDCCH that schedules the reference signal for positioning, the reference signal for positioning is not sent, where CombSize is a comb size.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of a PSCCH that schedule the reference signal for positioning is less than CombSize OFDM symbol (s) plus a duration for AGC and a duration for a PSCCH/PDCCH that schedules the reference signal for positioning, the reference signal for positioning is not sent, where CombSize is a comb size.
  • the configuration information may indicate an LBT/CCA type associated with CombSize of the reference signal for positioning, where CombSize is a comb size.
  • the configuration information may indicate that a PSCCH starts with a first interlace while the reference signal for positioning starts with a second interlace.
  • the configuration information may indicate that every M RBs out of a bandwidth composes an interlace, where M is an integer.
  • the configuration may indicate one or more CombSize interlaces for the transmission of the reference signal positioning, where CombSize is a comb size.
  • the configuration information may indicate information indicates an interlace that contains RBs, each of the RBs associated with an RB index.
  • the configuration information may indicate more than one sub-interlace within an interlace.
  • the configuration information may indicate a sub-interlace indicator in a PSCCH/PSSCH/PDCCH.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a remaining duration of a COT (RemainingDuration) is less than CombSize OFDM symbols, RemainingDuration-CombSize/Q OFDM symbols are dropped, where CombSize is a comb size and Q is an integer.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a remaining duration of a COT (RemainingDuration) is less than CombSize ⁇ RepetitionFactor OFDM symbols, RemainingDuration-CombSize ⁇ RepetitionFactor/Q OFDM symbols are dropped, where CombSize is a comb size and Q is an integer.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a remaining duration of a COT (RemainingDuration) is less than P ⁇ CombSize OFDM symbols and more than or equal to CombSize OFDM symbols, RemainingDuration- (P-1) ⁇ CombSize OFDM symbols are a repetition of CombSize-1 OFDM symbols, where CombSize is a comb size and P is an integer.
  • RemainingDuration- (P-1) ⁇ CombSize OFDM symbols are a repetition of CombSize-1 OFDM symbols, where CombSize is a comb size and P is an integer.
  • the configuration information may include an energy detection threshold, and wherein the energy detection threshold is included in COT sharing information.
  • the energy detection threshold may be associated with a number of simultaneous transmissions of the reference signal for positioning.
  • the energy detection threshold may be associated with CombSize of the reference signal for positioning.
  • the energy detection threshold may be associated with a number of interlaces.
  • the configuration information may indicate quasi-co-location (QCL) information included in COT sharing information.
  • the configuration information may indicate a transmission configuration indicator included in COT sharing information.
  • the configuration information may indicate interlace information included in COT sharing information.
  • the configuration information may indicate a LBT/CCA bandwidth included in COT sharing information.
  • the configuration information may indicate the reference signal for positioning in one resource pool (RP) (or resource, or resource set) as a beam reference (or QCL source) of another reference signal for positioning in another RP.
  • the configuration information may indicate that when a wireless communication device reports measurement results of the reference signal for positioning, a resource index is attached.
  • the configuration information may indicate that, when a wireless communication device reports measurement results of the reference signal for positioning, a timestamp is attached.
  • the configuration information may indicate a physical sidelink feedback channel (PSFCH) for measuring a beam direction.
  • the PSFCH shares a COT of the reference signal for positioning.
  • the transmission may include a COT duration associated with a comb size of the reference signal for positioning or a repetition factor of the reference signal for positioning.
  • a wireless communication device may identify configuration information about a reference signal for positioning sent from a second wireless communication device.
  • the wireless communication device may measure the reference signal for positioning.
  • the wireless communication device may send a report including a measurement result of the reference signal for positioning.
  • the measurement result may include the reference signal for positioning in one RP (or resource, or resource set) as a beam reference (or QCL source) of another reference signal for positioning in another RP.
  • the configuration information may indicate that when sending the report, a resource index should be attached.
  • the resource index may include a PRS resource index, a SL-PRS resource index, or a SRS resource index.
  • the configuration information may indicate that when sending the report, a timestamp can be attached.
  • the timestamp may include a system frame number (SFN) , a slot number within a frame, or a symbol index within a slot.
  • SFN system frame number
  • FIG. 1 illustrates an example cellular communication network in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure
  • FIG. 2 illustrates a block diagram of an example base station and a user equipment device, in accordance with some embodiments of the present disclosure
  • FIG. 3 illustrates an example implementation of positioning, in accordance with some embodiments of the present disclosure
  • FIG. 4 illustrates an example implementation of positioning, in accordance with some embodiments of the present disclosure
  • FIG. 5 illustrates a flow diagram of an example method for positioning, in accordance with an embodiment of the present disclosure.
  • FIG. 6 illustrates a flow diagram of an example method for positioning, in accordance with an embodiment of the present disclosure.
  • FIG. 1 illustrates an example wireless communication network, and/or system, 100 in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure.
  • the wireless communication network 100 may be any wireless network, such as a cellular network or a narrowband Internet of things (NB-IoT) network, and is herein referred to as “network 100.
  • NB-IoT narrowband Internet of things
  • Such an example network 100 includes a base station 102 (hereinafter “BS 102” ; also referred to as wireless communication node) and a user equipment device 104 (hereinafter “UE 104” ; also referred to as wireless communication device) that can communicate with each other via a communication link 110 (e.g., a wireless communication channel) , and a cluster of cells 126, 130, 132, 134, 136, 138 and 140 overlaying a geographical area 101.
  • the BS 102 and UE 104 are contained within a respective geographic boundary of cell 126.
  • Each of the other cells 130, 132, 134, 136, 138 and 140 may include at least one base station operating at its allocated bandwidth to provide adequate radio coverage to its intended users.
  • the BS 102 may operate at an allocated channel transmission bandwidth to provide adequate coverage to the UE 104.
  • the BS 102 and the UE 104 may communicate via a downlink radio frame 118, and an uplink radio frame 124 respectively.
  • Each radio frame 118/124 may be further divided into sub-frames 120/127 which may include data symbols 122/128.
  • the BS 102 and UE 104 are described herein as non-limiting examples of “communication nodes, ” generally, which can practice the methods disclosed herein. Such communication nodes may be capable of wireless and/or wired communications, in accordance with various embodiments of the present solution.
  • FIG. 2 illustrates a block diagram of an example wireless communication system 200 for transmitting and receiving wireless communication signals (e.g., OFDM/OFDMA signals) in accordance with some embodiments of the present solution.
  • the system 200 may include components and elements configured to support known or conventional operating features that need not be described in detail herein.
  • system 200 can be used to communicate (e.g., transmit and receive) data symbols in a wireless communication environment such as the wireless communication environment 100 of FIG. 1, as described above.
  • the System 200 generally includes a base station 202 (hereinafter “BS 202” ) and a user equipment device 204 (hereinafter “UE 204” ) .
  • the BS 202 includes a BS (base station) transceiver module 210, a BS antenna 212, a BS processor module 214, a BS memory module 216, and a network communication module 218, each module being coupled and interconnected with one another as necessary via a data communication bus 220.
  • the UE 204 includes a UE (user equipment) transceiver module 230, a UE antenna 232, a UE memory module 234, and a UE processor module 236, each module being coupled and interconnected with one another as necessary via a data communication bus 240.
  • the BS 202 communicates with the UE 204 via a communication channel 250, which can be any wireless channel or other medium suitable for transmission of data as described herein.
  • system 200 may further include any number of modules other than the modules shown in FIG. 2.
  • modules other than the modules shown in FIG. 2.
  • the various illustrative blocks, modules, circuits, and processing logic described in connection with the embodiments disclosed herein may be implemented in hardware, computer-readable software, firmware, or any practical combination thereof.
  • various illustrative components, blocks, modules, circuits, and steps are described generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software can depend upon the particular application and design constraints imposed on the overall system. Those familiar with the concepts described herein may implement such functionality in a suitable manner for each particular application, but such implementation decisions should not be interpreted as limiting the scope of the present disclosure.
  • the UE transceiver 230 may be referred to herein as an "uplink" transceiver 230 that includes a radio frequency (RF) transmitter and a RF receiver each comprising circuitry that is coupled to the antenna 232.
  • a duplex switch (not shown) may alternatively couple the uplink transmitter or receiver to the uplink antenna in time duplex fashion.
  • the BS transceiver 210 may be referred to herein as a "downlink" transceiver 210 that includes a RF transmitter and a RF receiver each comprising circuity that is coupled to the antenna 212.
  • a downlink duplex switch may alternatively couple the downlink transmitter or receiver to the downlink antenna 212 in time duplex fashion.
  • the operations of the two transceiver modules 210 and 230 may be coordinated in time such that the uplink receiver circuitry is coupled to the uplink antenna 232 for reception of transmissions over the wireless transmission link 250 at the same time that the downlink transmitter is coupled to the downlink antenna 212. Conversely, the operations of the two transceivers 210 and 230 may be coordinated in time such that the downlink receiver is coupled to the downlink antenna 212 for reception of transmissions over the wireless transmission link 250 at the same time that the uplink transmitter is coupled to the uplink antenna 232. In some embodiments, there is close time synchronization with a minimal guard time between changes in duplex direction.
  • the UE transceiver 230 and the base station transceiver 210 are configured to communicate via the wireless data communication link 250, and cooperate with a suitably configured RF antenna arrangement 212/232 that can support a particular wireless communication protocol and modulation scheme.
  • the UE transceiver 210 and the base station transceiver 210 are configured to support industry standards such as the Long Term Evolution (LTE) and emerging 5G standards, and the like. It is understood, however, that the present disclosure is not necessarily limited in application to a particular standard and associated protocols. Rather, the UE transceiver 230 and the base station transceiver 210 may be configured to support alternate, or additional, wireless data communication protocols, including future standards or variations thereof.
  • LTE Long Term Evolution
  • 5G 5G
  • the BS 202 may be an evolved node B (eNB) , a serving eNB, a target eNB, a femto station, or a pico station, for example.
  • eNB evolved node B
  • the UE 204 may be embodied in various types of user devices such as a mobile phone, a smart phone, a personal digital assistant (PDA) , tablet, laptop computer, wearable computing device, etc.
  • PDA personal digital assistant
  • the processor modules 214 and 236 may be implemented, or realized, with a general purpose processor, a content addressable memory, a digital signal processor, an application specific integrated circuit, a field programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein.
  • a processor may be realized as a microprocessor, a controller, a microcontroller, a state machine, or the like.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other such configuration.
  • the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in firmware, in a software module executed by processor modules 214 and 236, respectively, or in any practical combination thereof.
  • the memory modules 216 and 234 may be realized as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • memory modules 216 and 234 may be coupled to the processor modules 210 and 230, respectively, such that the processors modules 210 and 230 can read information from, and write information to, memory modules 216 and 234, respectively.
  • the memory modules 216 and 234 may also be integrated into their respective processor modules 210 and 230.
  • the memory modules 216 and 234 may each include a cache memory for storing temporary variables or other intermediate information during execution of instructions to be executed by processor modules 210 and 230, respectively.
  • Memory modules 216 and 234 may also each include non-volatile memory for storing instructions to be executed by the processor modules 210 and 230, respectively.
  • the network communication module 218 generally represents the hardware, software, firmware, processing logic, and/or other components of the base station 202 that enable bi-directional communication between base station transceiver 210 and other network components and communication nodes configured to communication with the base station 202.
  • network communication module 218 may be configured to support internet or WiMAX traffic.
  • network communication module 218 provides an 802.3 Ethernet interface such that base station transceiver 210 can communicate with a conventional Ethernet based computer network.
  • the network communication module 218 may include a physical interface for connection to the computer network (e.g., Mobile Switching Center (MSC) ) .
  • MSC Mobile Switching Center
  • the Open Systems Interconnection (OSI) Model (referred to herein as, “open system interconnection model” ) is a conceptual and logical layout that defines network communication used by systems (e.g., wireless communication device, wireless communication node) open to interconnection and communication with other systems.
  • the model is broken into seven subcomponents, or layers, each of which represents a conceptual collection of services provided to the layers above and below it.
  • the OSI Model also defines a logical network and effectively describes computer packet transfer by using different layer protocols.
  • the OSI Model may also be referred to as the seven-layer OSI Model or the seven-layer model.
  • a first layer may be a physical layer.
  • a second layer may be a Medium Access Control (MAC) layer.
  • MAC Medium Access Control
  • a third layer may be a Radio Link Control (RLC) layer.
  • a fourth layer may be a Packet Data Convergence Protocol (PDCP) layer.
  • PDCP Packet Data Convergence Protocol
  • a fifth layer may be a Radio Resource Control (RRC) layer.
  • a sixth layer may be a Non Access Stratum (NAS) layer or an Internet Protocol (IP) layer, and the seventh layer being the other layer.
  • NAS Non Access Stratum
  • IP Internet Protocol
  • the 5th generation mobile communication system may provide a method for positioning (e.g., positioning reference signal (PRS, from a base station (e.g., gNB) ) and/or sounding reference signal (SRS, from a user equipment (UE) ) on a radio side.
  • PRS positioning reference signal
  • SRS sounding reference signal
  • UE user equipment
  • a positioning accuracy of the existing 5G-NR-based positioning solutions may not be high enough (e.g., one meter or worse) .
  • the positioning accuracy of the existing 5G-NR-based positioning solution can be even worse.
  • a positioning accuracy of 0.2 meter can be required.
  • a target of some commerce cases e.g., 0.2 meter
  • This disclosure is related to positioning accuracy improvement for 5G-NR-based positioning.
  • This disclosure relates to a radio communication about how to improve positioning accuracy for a 5G-NR-based positioning.
  • a positioning reference signal PRS
  • PRS positioning reference signal
  • multiple gNBs can be involved (e.g., three base stations) .
  • a UE may measure at least one PRS.
  • the UE may report measurement result (s) to a network (e.g., a Location Management Function (LMF) in a core network (CN) or a 5G CN (5GC) ) .
  • LMF Location Management Function
  • CN core network
  • 5GC 5G CN
  • a network element may include at least one of: a gNB, a CN, or a UE.
  • a sounding reference signal can be transmitted by a UE.
  • One or more gNBs e.g., multiple gNBs
  • the one or more gNBs may report measurement result (s) to a network (e.g., a LMF) .
  • a transmission of PRS and/or SRS for purpose of positioning can be easily affected by a radio propagation environment (e.g., fading, distortion) .
  • a radio propagation environment e.g., fading, distortion
  • This disclosure can provide a method for higher positioning accuracy.
  • the 5G-NR is a time synchronization system, where a channel/signal may transmit a pre-defined time framework (e.g., a symbol, a slot) when a pre-defined time is reached.
  • a pre-defined time framework e.g., a symbol, a slot
  • An unlicensed carrier may contain many types of wireless communication devices (e.g., wireless fidelity, WiFi device, blue-tooth device) .
  • a wireless communication device may transmit a channel/signal with different timing from that of the 5G-NR system.
  • an unlicensed carrier is occupied with competition (e.g., via listen before talk, LBT, or clear channel assessment, CCA.
  • a channel is an unlicensed carrier or a shared carrier) .
  • the wireless communication device may transmit a channel/signal (e.g., position reference signal, PRS, ) to occupy the unlicensed carrier for a future transmission of channel/signal.
  • a channel/signal e.g., position reference signal, PRS,
  • An occupancy channel/signal (e.g., cyclic pre-fix extension, CPE, or CPE channel/signal) is used to occupy the unlicensed carrier before transmission of a channel/signal.
  • the occupancy signal/channel may be included in a de-modulation reference signal (DM-RS) .
  • the occupancy channel/signal may be included in a DM-RS of physical sidelink control channel (PSCCH) .
  • the occupancy signal/channel may be included in a DM-RS of PSCCH that schedule SL-PRS (sidelink-position reference signal) .
  • the occupancy channel/signal may be based on DM-RS of PSCCH that schedule SL-PRS.
  • DM-RS based channel-sensing e.g., energy detection, with energy accumulation on occupancy signal and real transmission of DM-RS.
  • the occupancy channel/signal may be included in a DM-RS of physical downlink control channel (PDCCH) or enhanced physical downlink control channel (EPDCCH) .
  • the occupancy signal/channel may be included in a DM-RS of PDCCH that schedule PRS.
  • the occupancy channel/signal may be based on DM-RS of PDCCH that schedule PRS.
  • the occupancy channel/signal may be included in a SL-PRS.
  • the occupancy signal/channel may be based on SL-PRS.
  • the occupancy channel/signal can be PRS or SRS (sound reference signal) .
  • the occupancy channel/signal may be based on PRS or SRS.
  • the occupancy signal/channel may be included in an automatic gain control (AGC) symbol.
  • AGC automatic gain control
  • the occupancy channel/signal may be included in an AGC symbol that is just before SL-PRS.
  • the occupancy signal/channel may be included in an AGC symbol that is just before PSCCH.
  • the occupancy channel/signal may be included in an AGC symbol that is just before PSCCH that schedules SL-PRS.
  • the occupancy channel/signal may be included in a channel-state information reference signal (CSI-RS, e.g., from gNB or, SL CSI-RS from a SL UE) .
  • CSI-RS channel-state information reference signal
  • the occupancy channel/signal may be included in a cyclic pre-fix extension (CPE) of the next symbol to be transmitted.
  • CPE cyclic pre-fix extension
  • an occupancy signal/channel may be transmitted.
  • the transmission duration of an occupancy signal/channel may be the time gap G.
  • a channel or a carrier, or a spectrum
  • SL-PRS or PRS
  • the transmission duration of an occupancy signal/channel may be the time gap G. Transmission of occupancy signal/channel may specify a channel/signal to be occupied for future transmission of a SL-PRS (or PRS) which enables positioning on an unlicensed carrier.
  • an occupancy channel/signal may be transmitted.
  • copied may be an operation of modular.
  • exp (-j*2 ⁇ * (1+x) ) will copy the value of exp (-j*2 ⁇ *x) because there is an operation of modular of 2 ⁇ wherein, exp () is an exponential function, j is the unit of imaginary number of complex number, x is an unknown variable.
  • the T may be configured by network) .
  • a channel (or a carrier, or a spectrum) may be occupied for future transmission of SL-PRS (or PRS, or SRS) which enables positioning on an unlicensed carrier.
  • SL-PRS or PRS, or SRS
  • a channel under an unlicensed spectrum will not be occupied by other radio devices.
  • a UE may transmit AGC and CPE symbol before the real transmission of positioning related signal/channel (e.g., PSCCH/SL-PRS) .
  • PSCCH/SL-PRS positioning related signal/channel
  • OFDM orthogonal frequency division multiplexing
  • a UE may have different capability (e.g., some UE require 2192 T s , some UE require 1024 T s ) .
  • a UE may report its processing capability of AGC to the network (or to another UE, e.g., server UE) . If the time gap between a successful LBT/CCA and the pre-defined start time of PSCCH that schedules SL-PRS is greater or equal to UE’s processing capability of AGC, then the occupancy channel/signal (i.e., CPE or CPE signal) is transmitted (by this UE) .
  • the occupancy channel/signal i.e., CPE or CPE signal
  • copied may be an operation of modular.
  • exp (-j*2 ⁇ * (1+x) ) will copy the value of exp (-j*2 ⁇ *x) because there is an operation of modular of 2 ⁇ wherein, exp () is an exponential function, j is the unit of imaginary number of complex number, x is an unknown variable.
  • Occupy (-T AGC -t) S PSCCH (T OFDM -T AGC -t) , 0 ⁇ t ⁇ T OFDM -T AGC
  • t may be in unit of T s
  • T AGC is UE’s processing capability of AGC
  • T OFDM is the duration of an OFDM symbol (e.g., 2192 T s under normal cyclic pre-fix, CP)
  • Occupy () is the occupancy signal/channel (i.e., CPE)
  • S PSCCH is the time domain signal of PSCCH that schedules SL-PRS.
  • a gNB may transmit CPE symbol/signal/channel before the real transmission of positioning related channel/signal (e.g., PRS/SRS) .
  • PRS/SRS positioning related channel/signal
  • a gNB For DL (or UL) positioning under an unlicensed spectrum (or shared spectrum) , a gNB (or a UE) can transmit CPE symbol/signal/channel before the real transmission of positioning related channel/signal (e.g., PRS/SRS) .
  • positioning related channel/signal e.g., PRS/SRS
  • the SL-PRS/PRS/SRS will not be transmitted.
  • CombSize 4 symbols (Note: this will ensure a full staggering pattern of PRS/SRS)
  • the PRS/SRS will not be transmitted (i.e., a UE is not required to receive PRS /transmit SRS) .
  • the SL-PRS/PRS/SRS will be transmitted (i.e., a UE should receive PRS /transmit SRS) .
  • SL-PRS/PRS/SRS For a Comb-based transmission of SL-PRS, if the time gap between a successful LBT/CCA and the pre-defined end time of SL-PRS is less than CombSize/Q OFDM symbol (s) , then the SL-PRS/PRS/SRS will not be transmitted. Alternatively, for a Comb-based transmission of SL-PRS, if the time gap between a successful LBT/CCA and the pre-defined end time of SL-PRS is less than CombSize/Q OFDM symbol (s) plus duration for AGC, then the SL-PRS/PRS/SRS will not be transmitted.
  • SL-PRS/PRS/SRS For a Comb-based transmission of SL-PRS, if the time gap between a successful LBT/CCA and the pre-defined end time of PSCCH that schedules SL-PRS is less than CombSize/Q OFDM symbol (s) , then the SL-PRS/PRS/SRS will not be transmitted.
  • the time gap between a successful LBT/CCA and the pre-defined end time of PSCCH that schedules SL- PRS is less than CombSize/Q OFDM symbol (s) plus duration for AGC, then the SL-PRS/PRS/SRS will not be transmitted.
  • SL-PRS/PRS/SRS For a Comb-based transmission of SL-PRS, if the time gap between a successful LBT/CCA and the pre-defined end time of SL-PRS is less than CombSize OFDM symbol (s) , then the SL-PRS/PRS/SRS will not be transmitted. Alternatively, for a Comb-based transmission of SL-PRS, if the time gap between a successful LBT/CCA and the pre-defined end time of SL-PRS is less than CombSize OFDM symbol (s) plus duration for AGC, then the SL-PRS/PRS/SRS will not be transmitted.
  • SL-PRS/PRS/SRS For a Comb-based transmission of SL-PRS, if the time gap between a successful LBT/CCA and the pre-defined end time of PSCCH that schedules SL-PRS is less than CombSize OFDM symbol (s) , then the SL-PRS/PRS/SRS will not be transmitted.
  • the time gap between a successful LBT/CCA and the pre-defined end time of PSCCH that schedules SL-PRS is less than CombSize OFDM symbol (s) plus duration for AGC, then the SL-PRS/PRS/SRS will not be transmitted.
  • SL-PRS/PRS/SRS will not be transmitted wherein, the CombSize and Q may be set to be one.
  • the PRS/SRS will not be transmitted.
  • PRS/SRS For a Comb-based transmission of PRS/SRS, if the time gap between a successful LBT/CCA and the pre-defined end time of PRS/SRS if less than CombSize/Q OFDM symbol (s) when PRS/SRS is not scheduled by EPDCCH/PDCCH, then the PRS/SRS will not be transmitted.
  • SL-PRS/PRS/SRS will not be transmitted wherein, the CombSize and Q may be set to be one.
  • an LBT/CCA type can be associated with the CombSize of reference signal for positioning.
  • a LBT/CCA with short duration e.g. 16us
  • a LBT/CCA with long duration e.g. 25us
  • an LBT/CCA type can be associated with the CombSize and repetition factor (configured by higher layer) of reference signal for positioning.
  • a channel (or a carrier, or a spectrum) can be occupied for future transmission of SL-PRS (or PRS, or SRS) , which will enable positioning on an unlicensed carrier (or shared spectrum) .
  • SL-PRS or PRS, or SRS
  • PRS/SRS/SL-PRS positioning under an unlicensed spectrum may be observed after an unspecified duration (for good performance) .
  • an interlaced transmission (or interlaced RB transmission) may be applied.
  • PSCCH/physical sidelink shared channel (PSSCH) /physical sidelink feedback channel (PSFCH) and SL-PRS can be allocated with different interlace (s) .
  • the PSCCH that schedules SL-PRS starts with the first interlace while the corresponding SL-PRS starts with the second interlace (or an interlace different from that for PSCCH) .
  • an interlace RB-based frequency division multiplexing (FDM) may be applied for SL positioning.
  • PDCCH/physical downlink shared channel (PDSCH) /physical uplink shared channel (PUSCH) /physical uplink control channel (PUCCH) and PRS/SRS can be allocated with different interlace (s) .
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • PRS/SRS Physical uplink control channel
  • FDM frequency division multiplexing
  • the M has the identical value of CombSize (e.g., 1, 2, 3, 4, 6, 8, 12, 24, 36, 48) of PRS/SRS/SL-PRS where the CombSize can be configured by higher layer (or network) .
  • CombSize interlace for transmission of DL/UL/SL positioning related signal/channel under an unlicensed spectrum.
  • one RB of every CombSize RB out of a bandwidth is composed of an interlace.
  • an interlace may include sub-interlaces (segments) .
  • the first interlace contains RB#0, 10, 20, 30, 40, 50, 60, 70, 80, 90
  • the first sub-interlace first segment, containing RB#0, 10, 20, 30, 40
  • the second sub-interlace second segment, containing RB#50, 60, 70, 80, 90
  • the first sub-interlace (containing RB#0, 20, 40, 60, 80) may be allocated to a first UE while the second sub-interlace (containing RB#10, 30, 50, 70, 90) may be allocated to a second UE.
  • a sub-interlace may include the whole bandwidth of the interlace it belongs to.
  • a sub-interlace may include the whole bandwidth of the unlicensed carrier it lives.
  • multiple wireless communication devices may transmit a reference signal for positioning simultaneously within an interlace where the bandwidth of an unlicensed carrier can be shared.
  • this method can be applied to a UE under radio resource control (RRC) connected state (RRC_Connected) or RRC_Inactive state or RRC_Idle state.
  • RRC radio resource control
  • multiple positioning related wireless communication devices may share an unlicensed carrier at the same time (e.g., interlace RB-based FDM) .
  • a channel occupancy time is limited (e.g., in Europe, 10ms at most for one transmission. e.g., 1 ms at most for sidelink synchronization signal block, S-SSB transmission with a Type 2A channel access procedure without a shared channel occupancy) .
  • a COT reduces to a small duration, then the positioning related channel/signal will not be transmitted (e.g., the last one/several symbol (s) of reference signal for positioning will be dropped) .
  • the positioning related channel/signal will not be transmitted (e.g., the last one/several symbol (s) of reference signal for positioning will be dropped) .
  • a PRS/SRS/SL-PRS may be transmitted in the DL/UL/SL reference duration.
  • a PRS/SRS/SL-PRS with (feedback of) PSFCH may be transmitted in the DL/UL/SL reference duration.
  • the channel i.e., carrier
  • SNR signal power to noise power ration
  • a COT duration (of a LBT/CCA type) is associated with a Comb size of reference signal for positioning. For example, if the Comb size of PRS/SRS/SL-PRS is 1, 2, 3, 4, 6, 12, 24, 36, 48, then the COT duration will be CombSize+AGC_Symbol (i.e., 2, 3, 4, 5, 7, 13, 25, 37, 49 symbols, respectively) . Alternatively, the COT duration will be CombSize+AGC_Symbol plus occupancy channel /signal (or CPE) duration.
  • a COT duration (of a LBT/CCA type) is associated with a Comb size and repetition factor of reference signal for positioning.
  • the COT duration will be CombSize*Repetition +AGC_Symbol.
  • the COT duration will be CombSize*Repetition +AGC_Symbol plus occupancy signal/channel (or CPE) duration.
  • Some slots that contain SSB may not be used for SL communication. Furthermore, some slots reserved may not be used for SL communication (e.g., not for Rel-16/17/18 sidelink UE) .
  • a slot that contains SSB may be used for SL-PRS (and/or PSCCH that schedules SL-PRS) and may improve the resource efficiency (and/or to reduce positioning delay) wherein, on the OFDM symbols for SSB (or S-SSB) , the RB (or frequency resources) for SSB (or S-SSB) are unavailable for SL-PRS/PSCCH that schedules SL-PRS.
  • the RB (or frequency resources) for SSB may be in a SL-PRS/PSCCH that schedules SL-PRS, but they are rate matched (or, punctured. That is, without actual transmission of SL-PRS/PSCCH on these time-frequency resources that are for SSB/S-SSB) .
  • a slot that is reserved which is unavailable for Rel-16/17/18 sidelink UE may be used for SL-PRS (and/or PSCCH that schedules SL-PRS) wherein, the SL-PRS (and/or PSCCH that schedules SL-PRS) is for Rel-19 sidelink UE (and/or later) .
  • the UE behavior may be determined and the unlicensed channel (i.e., unlicensed carrier) will be utilized more efficiently.
  • a radio device e.g., a gNB, or a UE may share this unlicensed channel to another wireless communication device within this COT duration (or maximum COT, or maximum COT duration) .
  • this is helpful for DL positioning (that requires transmission from multiple gNB) .
  • the COT sharing may be indicated by a downlink control information (DCI) on PDCCH or a sidelink control information (SCI) on PSCCH/PSSCH/second stage SCI for SL-PRS.
  • DCI downlink control information
  • SCI sidelink control information
  • This may enable simultaneous transmission of SL-PRS from multiple UE (similar to that of DL positioning) .
  • the energy detection threshold is associated with number of simultaneous transmission of SL-PRS/SRS of UE (or PRS of gNB) .
  • energy detection threshold is different for FR 1 and FR 2) .
  • the energy detection threshold may be for configured grant (CG) scheduling (or semi-persistence grant, SG, or dynamic grant, DG) .
  • the energy detection threshold may be based on a bandwidth.
  • the energy detection threshold is associated with the CombSize of SL-PRS/SRS/PRS.
  • the shared COT may only be transmitted within a duration wherein, the duration may be less than or equal to CombSize OFDM symbols (e.g., 1, 2, 3, 4 symbols) .
  • a maximum energy detection threshold (or an energy detection threshold) may be associated with at least one of: channel bandwidth (or carrier bandwidth) , bandwidth of sub-channel, bandwidth of resource pool (RP) , number of sub-channels, bandwidth part (BWP) , NumberOfUE, CombSize, number of interlaces, number of interlaced resources, number of interlaced RB.
  • a maximum energy detection threshold (or an energy detection threshold) for COT sharing may be associated with at least one of: channel bandwidth (or carrier bandwidth) , bandwidth of sub-channel, bandwidth of RP, number of sub-channels, BWP, NumberOfUE, CombSize, number of interlaces, number of interlaced resources, number of interlaced RB.
  • a maximum energy detection threshold (or an energy detection threshold) for an initiated COT may be associated with at least one of: channel bandwidth (or carrier bandwidth) , bandwidth of sub-channel, bandwidth of RP, number of sub-channels, BWP, NumberOfUE, CombSize, number of interlaces, number of interlaced resources, number of interlaced RB.
  • a maximum energy detection threshold (or an energy detection threshold) for COT non-sharing may be associated with at least one of: channel bandwidth (or carrier bandwidth) , bandwidth of sub-channel, bandwidth of RP, number of sub-channels, BWP, NumberOfUE, CombSize, number of interlaces, number of interlaced resources, number of interlaced RB.
  • the transmission bandwidth should be within the BWP of the initiated COT (e.g., for frequency range 1 or 2, FR 1 or 2) .
  • the transmission bandwidth can be outside the BWP of the initiated COT (e.g., for FR 2-2) .
  • the transmission bandwidth can be outside the BWP of the initiated COT but within the bandwidth of the initiated COT (e.g., for FR 2) .
  • a quasi-co-location (QCL) information may be included in the COT sharing information.
  • the QCL information may include QCL type (e.g., type A/B/C/D) and QCL source (e.g., synchronization signal block, SSB, SSB index, CSI-RS, CSI-RS resource index, PRS resource index, SRS resource index, SL-PRS resource index) .
  • QCL source e.g., synchronization signal block, SSB, SSB index, CSI-RS, CSI-RS resource index, PRS resource index, SRS resource index, SL-PRS resource index
  • a transmission configuration indicator (TCI) information may be included in the COT sharing information.
  • the TCI information can include QCL type and QCL reference signal. Moreover, this is helpful for beamforming-based transmission of SL-PRS/SRS/PRS.
  • An interlace information can be included in the COT sharing information.
  • the energy detection threshold is associated with the number of interlaces.
  • the energy detection threshold is associated the number of interlaced RB.
  • a frequency and bandwidth information may be included in the COT sharing information.
  • (an available) LBT/CCA bandwidth may be included in the COT sharing information. For example, if one UE had occupied one 100MHz bandwidth (after a successful LBT/CCA) , then this UE can share its COT on a 20MHz, a 40MHz, another 40MHz for a first UE, a second UE, a third UE as LBT/CCA bandwidth, respectively.
  • a beam-related information (e.g., bearing angle, boresight angle, PRS resource index, SL-PRS resource index) may be included in the COT sharing information.
  • a COT may be shared among multiple wireless communication devices, which will enable multiple sites positioning and the unlicensed channel (i.e., unlicensed carrier) will be utilized more efficiently.
  • a reference signal for positioning may be transmitted in a form of beamforming, which will improve reception signal quality at a receiver.
  • a CSI-RS (or DM-RS, e.g., DM-RS of PSCCH that schedules SL-PRS) may be transmitted with SL-PRS/PRS in a form of time division multiplexing (TDM, e.g., CSI-RS first, then SL-PRS/PRS) with identical beam (or beam index, or beam direction, or CSI-RS resource index) .
  • TDM time division multiplexing
  • This CSI-RS may be the beam reference (or QCL source, or QCL reference) of SL-PRS/PRS when a UE measures SL-PRS/PRS.
  • a CSI-RS may be transmitted simultaneously with SL-PRS/PRS in a form of Comb (e.g., Comb-based FDM) with different Comb offset.
  • Comb e.g., Comb-based FDM
  • a SL-PRS/PRS/SRS in one RP can be the beam reference (or QCL source, or QCL reference) of SL-PRS/PRS/SRS in another RP (or resource, or resource set) when a radio device measures SL-PRS/PRS/SRS.
  • this method is helpful for cross-pool beam management.
  • a wireless communication device e.g., UE, or gNB, or transmission and reception point, TRP
  • a resource index e.g., PRS resource index, SL-PRS resource index, SRS resource index
  • this method is helpful for beam management/maintenance.
  • a beam index is attached.
  • a wireless communication device e.g., UE, or gNB, or transmission and reception point, TRP
  • a wireless communication device e.g., UE, or gNB, or transmission and reception point, TRP
  • a timestamp e.g., system frame number, SFN, device frame number, DFN, slot number within a frame, symbol index within a slot, start symbol index, end symbol index
  • this method is helpful for beam management/maintenance with beam sweeping/repetition and indicates which beam is referred and when a beam is referred.
  • the CSI-RS that serves as beam reference (or QCL source, or QCL reference) for SL-PRS/PRS/SRS may be carried by a PSSCH as accompanying data.
  • one (or multiple) PSFCH can be used to feedback for which beam direction (or SL-PRS/PRS/SRS resource, or SL-PRS/PRS/SRS resource index) is measured (or measured with the highest reference signal received power, RSRP value) , wherein a PSFCH can share the COT of SL-PRS/PRS/SRS.
  • each PSFCH may have a separate LBT/CCA (e.g., with a Type A or Type B channel access procedure) .
  • a set of PSFCH may have a LBT/CCA.
  • a set of PSFCH may have a LBT/CCA where these PSFCH are transmitted at the same time.
  • a PSFCH corresponding to a SL-PRS resource index is transmitted, then this beam direction of SL-PRS is the best direction. If a PSFCH corresponding to a SL-PRS resource index is not transmitted, then this beam direction is not measured (or not available) .
  • a PSFCH with a value of “1” means the corresponding SL-PRS (or SL-PRS resource) is transmitted while a value of “0” (or a value for negative acknowledgement, NACK) for “not transmitted” .
  • a cyclic shift of SL-PRS/PRS/SRS can be used to feedback for beam direction (e.g., cyclic shift#5 for beam direction#5, one to one mapping) .
  • a cyclic shift of SL-PRS/PRS/SRS can be used to feedback for which beam direction (or SSB, or SSB index, or SL-PRS/PRS/SRS resource, or SL-PRS/PRS/SRS resource index) is measured.
  • a wireless communication device measures differential carrier phase (with a pair of carrier phase measurements, or two carrier phase measurements)
  • an identical phase error group PEG
  • a PEG may be with zero phase error margin.
  • the timing of carrier phase measurement may be the start of an OFDM symbol, where a SL-PRS/PRS/SRS (or SL-PRS/PRS/SRS resource) is transmitted.
  • the data e.g., PDSCH/PUSCH for reporting positioning related data, e.g., assistance data of positioning, measurement result
  • the data can be transmitted (or received) with hopping.
  • a UE may combine the PDSCH on these five hops (if they are in repetition with each other, even with a different redundancy version) .
  • a UE may transmit PUSCH repeatedly with five times. With this method, the decoding performance of PDSCH/PUSCH may be improved (e.g., five times improvement on signal quality) .
  • each hop is transmitted (or received) with an identical beam (or beam direction, or QCL source, or QCL reference, or QCL reference source, or identical TCI information) .
  • each hop is associated with the same QCL reference (e.g., the same SSB, the same SSB index, the same CSI-RS resource, the same CSI-RS resource index, the same SL-PRS/PRS/SRS resource, the same SL-PRS/PRS/SRS resource index) .
  • the QCL reference (or QCL source) may be attached in a measurement report (with timestamp) .
  • PRS reception (Rx) frequency hopping can be applied for a RedCap UE under RRC_INACTIVE state.
  • a measurement gap (MG) can be configured for it.
  • the configuration of MG can be performed via a RRC release message before it entering RRC_INACTIVE state from RRC_Connected state.
  • the configuration of MG can be broadcasted in a system information block (SIB) .
  • SIB system information block
  • the measurement gap length (MGL) of MG can be 20ms, 40ms, 60ms, 80ms, 100ms, 200ms, 1000ms.
  • a full bandwidth of PRS/SRS reception could not be ensured, only the measurement result of one hop is reported. Otherwise, the measurement result of all the hops (or full bandwidth of PRS/SRS reception) is reported. Alternatively, a hop with the highest RSRP, and/or the highest SNR, and/or the largest bandwidth is reported.
  • a common starting physical resource block (PRB) for all the UE can be configured by higher layer (e.g., RRC of base station, RRC of another UE) .
  • the first hop e.g., a hop with hop ID 0, or a hop with the lowest frequency, or a hop with the highest frequency
  • the bandwidth of a hop is configured by higher layer.
  • each hop can have an identical value of bandwidth configured by higher layer.
  • FIG. 5 illustrates a flow diagram of a method 500 for signal transmission under an unlicensed carrier (or shared spectrum) .
  • the method 500 may be implemented using any one or more of the components and devices detailed herein in conjunction with FIGs. 1–2.
  • the method 500 may be performed by a wireless communication device or a wireless communication node, in some embodiments. Additional, fewer, or different operations may be performed in the method 500 depending on the embodiment. At least one aspect of the operations is directed to a system, method, apparatus, or a computer-readable medium.
  • a wireless communication entity may receive configuration information about a reference signal for positioning (e.g., a positioning reference signal (PRS) ) from a wireless communication node.
  • the wireless communication entity may send a transmission of the reference signal for positioning.
  • the transmission may include an occupancy signal based on a de-modulation reference signal (DM-RS) of a physical sidelink control channel (PSCCH) that schedules the reference signal for positioning.
  • DM-RS de-modulation reference signal
  • PSCCH physical sidelink control channel
  • the transmission may include an occupancy signal based on an automatic gain control (AGC) symbol that is just before a PSCCH that schedules the reference signal for positioning.
  • the transmission may include an occupancy signal based on a de-modulation reference signal (DM-RS) of a physical downlink control channel (PDCCH) that schedules the reference signal for positioning.
  • DM-RS de-modulation reference signal
  • PDCCH physical downlink control channel
  • the transmission may include an occupancy signal based on an automatic gain control (AGC) symbol that is just before a PSCCH that schedules the reference signal for positioning.
  • the configuration information may indicate that when a time-gap between a successful listen before talk (LBT) /clear channel assessment (CCA) and a pre-defined start time of a PSCCH that schedules the reference signal for positioning is greater or equal to the first wireless communication entity processing capability of AGC, sending the transmission.
  • the transmission may include an occupancy signal copied from an incoming PSCCH symbol.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of the reference signal for positioning is less than CombSize/Q orthogonal frequency division multiplexing (OFDM) symbol (s) , the reference signal for positioning is not sent, where CombSize is a comb size and Q is an integer.
  • CombSize is a comb size and Q is an integer.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of the reference signal for positioning is less than CombSize OFDM symbol (s) , the reference signal for positioning is not sent, where CombSize is a comb size.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of the reference signal for positioning is less than CombSize/Q OFDM symbol (s) plus a duration for AGC, the reference signal for positioning is not sent, where CombSize is a comb size and Q is an integer.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of a PSCCH that schedules the reference signal for positioning is less than CombSize/Q OFDM symbol (s) plus a duration for AGC, the reference signal for positioning is not sent, where CombSize is a comb size and Q is an integer.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of the reference signal for positioning is less than CombSize OFDM symbol (s) plus duration for AGC, the reference signal for positioning is not sent, where CombSize is a comb size.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of a PSCCH that schedule the reference signal for positioning is less than CombSize OFDM symbol (s) plus a duration for AGC, the reference signal for positioning is not sent, where CombSize is a comb size.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of a PSCCH that schedule the reference signal for positioning is less than CombSize OFDM symbol (s) plus a duration for a PSCCH/PDCCH that schedules the reference signal for positioning, the reference signal for positioning is not sent, where CombSize is a comb size.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a time-gap between a successful LBT/CCA and a pre-defined end time of a PSCCH that schedule the reference signal for positioning is less than CombSize OFDM symbol (s) plus a duration for AGC and a duration for a PSCCH/PDCCH that schedules the reference signal for positioning, the reference signal for positioning is not sent, where CombSize is a comb size.
  • the configuration information may indicate an LBT/CCA type associated with CombSize of the reference signal for positioning, where CombSize is a comb size.
  • the configuration information may indicate that a PSCCH starts with a first interlace while the reference signal for positioning starts with a second interlace.
  • the configuration information may indicate that every M RBs out of a bandwidth composes an interlace, where M is an integer.
  • the configuration may indicate one or more CombSize interlaces for the transmission of the reference signal positioning, where CombSize is a comb size.
  • the configuration information may indicate information indicates an interlace that contains RBs, each of the RBs associated with an RB index.
  • the configuration information may indicate more than one sub-interlace within an interlace.
  • the configuration information may indicate a sub interlace indicator in a PSCCH/PSSCH/PDCCH.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a remaining duration of a COT (RemainingDuration) is less than CombSize OFDM symbols, RemainingDuration-CombSize/Q OFDM symbols are dropped, where CombSize is a comb size and Q is an integer.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a remaining duration of a COT (RemainingDuration) is less than CombSize ⁇ RepetitionFactor OFDM symbols, RemainingDuration-CombSize ⁇ RepetitionFactor/Q OFDM symbols are dropped, where CombSize is a comb size and Q is an integer.
  • the reference signal for positioning may be configured as a Comb-based signal, and wherein when a remaining duration of a COT (RemainingDuration) is less than P ⁇ CombSize OFDM symbols and more than or equal to CombSize OFDM symbols, RemainingDuration- (P-1) ⁇ CombSize OFDM symbols are a repetition of CombSize-1 OFDM symbols, where CombSize is a comb size and P is an integer.
  • RemainingDuration- (P-1) ⁇ CombSize OFDM symbols are a repetition of CombSize-1 OFDM symbols, where CombSize is a comb size and P is an integer.
  • the configuration information may include an energy detection threshold, and wherein the energy detection threshold is included in COT sharing information.
  • the energy detection threshold may be associated with a number of simultaneous transmissions of the reference signal for positioning.
  • the energy detection threshold may be associated with CombSize of the reference signal for positioning.
  • the energy detection threshold may be associated with a number of interlaces.
  • the configuration information may indicate quasi-co-location (QCL) information included in COT sharing information.
  • the configuration information may indicate a transmission configuration indicator included in COT sharing information.
  • the configuration information may indicate interlace information included in COT sharing information.
  • the configuration information may indicate a LBT/CCA bandwidth included in COT sharing information.
  • the configuration information may indicate the reference signal for positioning in one resource pool (RP) (or resource, or resource set) as a beam reference (or QCL source) of another reference signal for positioning in another RP.
  • the configuration information may indicate that when a wireless communication device reports measurement results of the reference signal for positioning, a resource index is attached.
  • the configuration information may indicate that when a wireless communication device reports measurement results of the reference signal for positioning a timestamp is attached.
  • the configuration information may indicate a physical sidelink feedback channel (PSFCH) for measuring a beam direction.
  • the PSFCH shares a COT of the reference signal for positioning.
  • the transmission may include a COT duration associated with a comb size of the reference signal for positioning or a repetition factor of the reference signal for positioning.
  • FIG. 6 illustrates a flow diagram of a method 600 for signal reception under an unlicensed carrier (or shared spectrum) .
  • the method 600 may be implemented using any one or more of the components and devices detailed herein in conjunction with FIGs. 1–2.
  • the method 600 may be performed by a wireless communication device or a wireless communication node, in some embodiments. Additional, fewer, or different operations may be performed in the method 600 depending on the embodiment. At least one aspect of the operations is directed to a system, method, apparatus, or a computer-readable medium.
  • a wireless communication device may identify configuration information about a reference signal for positioning sent from a second wireless communication device.
  • the wireless communication device may measure the reference signal for positioning.
  • the wireless communication device may send a report including a measurement result of the reference signal for positioning.
  • the measurement result may include the reference signal for positioning in one RP (or resource, or resource set) as a beam reference (or QCL source) of another reference signal for positioning in another RP.
  • the configuration information may indicate that when sending the report, a resource index should be attached.
  • the resource index may include a PRS resource index, a SL-PRS resource index, or a SRS resource index.
  • the configuration information may indicate that when sending the report, a timestamp can be attached.
  • the timestamp may include a system frame number (SFN) , a slot number within a frame, or a symbol index within a slot.
  • SFN system frame number

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un procédé de communication sans fil est divulgué. Le procédé peut consister à recevoir, par une première entité de communication sans fil en provenance d'une seconde entité de communication sans fil, des informations de configuration concernant un signal de référence pour le positionnement. Le procédé peut consister à envoyer, par la première entité de communication sans fil à la seconde entité de communication sans fil, une transmission du signal de référence pour un positionnement sur la base des informations de configuration.
PCT/CN2023/110432 2023-07-31 2023-07-31 Procédé de positionnement sous porteuse partagée Pending WO2025025116A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202380089452.9A CN120419266A (zh) 2023-07-31 2023-07-31 共享载波下用于定位的方法
PCT/CN2023/110432 WO2025025116A1 (fr) 2023-07-31 2023-07-31 Procédé de positionnement sous porteuse partagée
KR1020257026779A KR20250133772A (ko) 2023-07-31 2023-07-31 공유 반송파 하에서의 위치 결정을 위한 방법

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Citations (3)

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CN114556848A (zh) * 2019-10-15 2022-05-27 高通股份有限公司 与ul prs发送属性相关的详细警告和错误报告
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