[go: up one dir, main page]

WO2024173254A1 - Procédés et appareil d'agrégation de transmission de sl-prs - Google Patents

Procédés et appareil d'agrégation de transmission de sl-prs Download PDF

Info

Publication number
WO2024173254A1
WO2024173254A1 PCT/US2024/015399 US2024015399W WO2024173254A1 WO 2024173254 A1 WO2024173254 A1 WO 2024173254A1 US 2024015399 W US2024015399 W US 2024015399W WO 2024173254 A1 WO2024173254 A1 WO 2024173254A1
Authority
WO
WIPO (PCT)
Prior art keywords
prs
wtru
resource
bandwidth
transmission
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.)
Ceased
Application number
PCT/US2024/015399
Other languages
English (en)
Inventor
Tao Deng
Fumihiro Hasegawa
Tuong Hoang
Paul Marinier
Moon Il Lee
Kunjan SHAH
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.)
InterDigital Patent Holdings Inc
Original Assignee
InterDigital Patent Holdings Inc
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 InterDigital Patent Holdings Inc filed Critical InterDigital Patent Holdings Inc
Publication of WO2024173254A1 publication Critical patent/WO2024173254A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • SL positioning has been studied in RAN1 for SL-only-base positioning and a combination of SL- and Uu-based positioning.
  • SL positioning methods including SL-Round Trip Time (RTT), SL-Angle of Arrival (AoA) and SL- Time Difference of Arrival (TDoA) are supported for SL positioning.
  • RTT SL-Round Trip Time
  • AoA SL-Angle of Arrival
  • TDoA SL- Time Difference of Arrival
  • a “timing/angle positioning method” may refer to any positioning method that uses reference signals such as SL-PRS.
  • the WTRU receives multiple reference signals from WTRU(s) and measures RSTD, RSRP, and/or AoA. Examples of angle/timing positioning methods are SL-AoD or SL-TDOA positioning.
  • the WTRU may transmit a SL-PRS to WTRU(s) and receiver performs measurements (e.g., RSTD, AoA, RSRP) for determination of the locations of the WTRU which transmitted SL-PRS.
  • a “RTT positioning method” may refer to any positioning method that requires two WTRUs to transmit SL-PRS to each other.
  • an anchor WTRU may transmit a SL-PRS to the target WTRU.
  • the target WTRU may transmit a SL- PRS to the anchor WTRU.
  • the target WTRU may measure WTRU Tx-Rx time difference which is the difference between transmission time of SL PRS from the target WTRU and reception time of SL-PRS transmitted from the anchor WTRU.
  • the target WTRU may report the WTRU Tx-Rx time difference to the anchor WTRU/network (e.g., gNB, LMF).
  • the term “network” may include AMF, LMF, gNB or NG-RAN. “Pre-configuration” and “configuration” may be used interchangeably in this disclosure.
  • the terms “non-serving gNB” and “neighboring gNB” may be used interchangeably.
  • the terms “gNB” and “TRP” may be used interchangeably.
  • the terms “PRS” and “PRS resource” may be used interchangeably.
  • the terms “PRS(s)” or “PRS resource(s)” may be used interchangeably.
  • the “PRS(s)” or “PRS resource(s)” may belong to different PRS resource sets.
  • the terms “PRS” or “DL- PRS” or “DL PRS” may be used interchangeably.
  • the terms “Measurement gap” or “Measurement gap pattern” may be used interchangeably in this disclosure. “Measurement gap pattern” may include parameters such as measurement gap duration or measurement gap repetition period or measurement gap periodicity.
  • a PRU may be a WTRU or TRP whose location (e.g., altitude, latitude, geographic coordinate, or local coordinate) is known by the network (e.g., gNB, LMF). Capabilities of PRU may be the same as a WTRU or TRP (e.g., capable of receiving PRS or transmit SRS or SRS for positioning, return measurements, or transmit PRS).
  • the WTRUs acting as PRUs may be used by the network for calibration purposes (e.g., correct unknown timing offset, correct unknown angle offset).
  • An LMF is a non-limiting example of a node or entity (e.g., network node or entity) that may be used for or to support positioning. Any other node or entity may be substituted for LMF and still be consistent with this disclosure.
  • a SL-PRS transmission may use a comb pattern and a pseudorandombased sequence and may be based on two resource allocation schemes, Scheme 1 and Scheme 2.
  • Scheme 1 SL-PRS resource allocation is performed by the NW.
  • a WTRU may perform autonomous SL-PRS resource allocation based on legacy SL Mode 2 resource selection (i.e. SL sensing).
  • a SL-PRS configuration may contain at least one of the following parameters: number of symbols, transmission power, number of SL-PRS resources included in SL-PRS resource set, muting pattern for SL-PRS (for example, the muting pattern may be expressed via a bitmap), periodicity, type of SL-PRS (e.g., periodic, semi-persistent, or aperiodic), slot offset for periodic transmission for SL-PRS, vertical shift of SL-PRS pattern in the frequency domain, time gap during repetition, repetition factor, RE (resource element) offset, comb pattern, comb size, spatial relation, QCL information (e.g., QCL target, QCL source) for SL-PRS, number of PRUs, number of TRPs, Absolute Radio-Frequency Channel Number (ARFCN), subcarrier spacing, expected RSTD, uncertainty in expected RSTD, start Physical Resource Block (PRB), bandwidth, BWP ID, number of frequency layers, start/end time
  • a method performed by a wireless transmit I receive unit may comprise: receiving a configuration information, the configuration information including a sidelink-position reference signal (SL-PRS) transmission aggregation information; selecting a first resource for a SL-PRS transmission, the SL-PRS transmission being over a first SL-PRS bandwidth; on a condition that a measured interference reference signal received power (RSRP) level in the selected first resource exceeds a RSRP threshold, determining a second SL-PRS bandwidth; based on the SL-PRS transmission aggregation information, selecting a second resource and third resource for two SL-PRS transmissions, each SL-PRS transmission being over the second SL-PRS bandwidth; and transmitting, using the selected second resource and third resource, the two SL-PRS transmissions.
  • SL-PRS sidelink-position reference signal
  • the SL-PRS transmission aggregation information may include a number of aggregated transmissions (N).
  • the SL-PRS transmission aggregation information may include the RSRP threshold.
  • the SL-PRS transmission aggregation information may include a set of aggregation parameters associated with at least of one of a SL position method or SL position requirement.
  • the set of aggregation parameters may include a time gap between aggregated SL-PRS transmissions.
  • the set of aggregation parameters may include overlapping bandwidths between aggregated SL-PRS transmissions.
  • the determination of the second SL-PRS bandwidth may further be based on a measured SL channel busy ratio (CBR) exceeding a threshold.
  • CBR measured SL channel busy ratio
  • FIG. 1A is a system diagram illustrating an example communications system in which one or more disclosed embodiments may be implemented
  • FIG. 1 B is a system diagram illustrating an example wireless transmit/receive unit (WTRU) that may be used within the communications system illustrated in FIG. 1A according to an embodiment;
  • WTRU wireless transmit/receive unit
  • FIG. 1C is a system diagram illustrating an example radio access network (RAN) and an example core network (CN) that may be used within the communications system illustrated in FIG. 1A according to an embodiment;
  • RAN radio access network
  • CN core network
  • FIG. 1 D is a system diagram illustrating a further example RAN and a further example CN that may be used within the communications system illustrated in FIG. 1A according to an embodiment
  • FIG. 2 is an example diagram of SL-PRS transmission aggregation
  • FIG. 3 is an example of a procedure for aggregating SL-PRS transmissions.
  • FIG. 1A is a diagram illustrating an example communications system 100 in which one or more disclosed embodiments may be implemented.
  • the communications system 100 may be a multiple access system that provides content, such as voice, data, video, messaging, broadcast, etc., to multiple wireless users.
  • the communications system 100 may enable multiple wireless users to access such content through the sharing of system resources, including wireless bandwidth.
  • the communications systems 100 may employ one or more channel access methods, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), single-carrier FDMA (SC-FDMA), zero-tail uniqueword discrete Fourier transform Spread OFDM (ZT-UW-DFT-S-OFDM), unique word OFDM (UW-OFDM), resource block-filtered OFDM, filter bank multicarrier (FBMC), and the like.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal FDMA
  • SC-FDMA single-carrier FDMA
  • ZT-UW-DFT-S-OFDM zero-tail uniqueword discrete Fourier transform Spread OFDM
  • UW-OFDM unique word OFDM
  • FBMC filter bank multicarrier
  • the communications system 100 may include wireless transmit/receive units (WTRUs) 102a, 102b, 102c, 102d, a radio access network (RAN) 104, a core network (CN) 106, a public switched telephone network (PSTN) 108, the Internet 110, and other networks 112, though it will be appreciated that the disclosed embodiments contemplate any number of WTRUs, base stations, networks, and/or network elements.
  • WTRUs 102a, 102b, 102c, 102d may be any type of device configured to operate and/or communicate in a wireless environment.
  • the WTRUs 102a, 102b, 102c, 102d may be configured to transmit and/or receive wireless signals and may include a user equipment (UE), a mobile station, a fixed or mobile subscriber unit, a subscription-based unit, a pager, a cellular telephone, a personal digital assistant (PDA), a smartphone, a laptop, a netbook, a personal computer, a wireless sensor, a hotspot or Mi-Fi device, an Internet of Things (loT) device, a watch or other wearable, a head-mounted display (HMD), a vehicle, a drone, a medical device and applications (e.g., remote surgery), an industrial device and applications (e.g., a robot and/or other wireless devices operating in an industrial and/or an automated processing chain contexts), a consumer electronics device, a device operating on commercial and/or industrial wireless networks, and the like.
  • UE user equipment
  • PDA personal digital assistant
  • HMD head-mounted display
  • a vehicle a drone
  • the communications systems 100 may also include a base station 114a and/or a base station 114b.
  • Each of the base stations 114a, 114b may be any type of device configured to wirelessly interface with at least one of the WTRUs 102a, 102b, 102c, 102d to facilitate access to one or more communication networks, such as the CN 106, the Internet 110, and/or the other networks 112.
  • the base stations 114a, 114b may be a base transceiver station (BTS), a NodeB, an eNode B (eNB), a Home Node B, a Home eNode B, a next generation NodeB, such as a gNode B (gNB), a new radio (NR) NodeB, a site controller, an access point (AP), a wireless router, and the like. While the base stations 114a, 114b are each depicted as a single element, it will be appreciated that the base stations 114a, 114b may include any number of interconnected base stations and/or network elements.
  • the base station 114a may be part of the RAN 104, which may also include other base stations and/or network elements (not shown), such as a base station controller (BSC), a radio network controller (RNC), relay nodes, and the like.
  • BSC base station controller
  • RNC radio network controller
  • the base station 114a and/or the base station 114b may be configured to transmit and/or receive wireless signals on one or more carrier frequencies, which may be referred to as a cell (not shown). These frequencies may be in licensed spectrum, unlicensed spectrum, or a combination of licensed and unlicensed spectrum.
  • a cell may provide coverage for a wireless service to a specific geographical area that may be relatively fixed or that may change overtime. The cell may further be divided into cell sectors.
  • the cell associated with the base station 114a may be divided into three sectors.
  • the base station 114a may include three transceivers, i.e., one for each sector of the cell.
  • the base station 114a may employ multiple-input multiple output (MIMO) technology and may utilize multiple transceivers for each sector of the cell.
  • MIMO multiple-input multiple output
  • beamforming may be used to transmit and/or receive signals in desired spatial directions.
  • the base stations 114a, 114b may communicate with one or more of the WTRUs 102a, 102b, 102c, 102d over an air interface 116, which may be any suitable wireless communication link (e.g., radio frequency (RF), microwave, centimeter wave, micrometer wave, infrared (IR), ultraviolet (UV), visible light, etc.).
  • the air interface 116 may be established using any suitable radio access technology (RAT).
  • RAT radio access technology
  • the communications system 100 may be a multiple access system and may employ one or more channel access schemes, such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and the like.
  • the base station 114a in the RAN 104 and the WTRUs 102a, 102b, 102c may implement a radio technology such as Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (UTRA), which may establish the air interface 116 using wideband CDMA (WCDMA).
  • WCDMA may include communication protocols such as High-Speed Packet Access (HSPA) and/or Evolved HSPA (HSPA+).
  • HSPA may include High-Speed Downlink (DL) Packet Access (HSDPA) and/or High-Speed Uplink (UL) Packet Access (HSUPA).
  • the base station 114a and the WTRUs 102a, 102b, 102c may implement a radio technology such as Evolved UMTS Terrestrial Radio Access (E-UTRA), which may establish the air interface 116 using Long Term Evolution (LTE) and/or LTE-Advanced (LTE-A) and/or LTE-Advanced Pro (LTE-A Pro).
  • E-UTRA Evolved UMTS Terrestrial Radio Access
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-A Pro LTE-Advanced Pro
  • the base station 114a and the WTRUs 102a, 102b, 102c may implement a radio technology such as NR Radio Access, which may establish the air interface 116 using NR.
  • the base station 114a and the WTRUs 102a, 102b, 102c may implement multiple radio access technologies.
  • the base station 114a and the WTRUs 102a, 102b, 102c may implement LTE radio access and NR radio access together, for instance using dual connectivity (DC) principles.
  • DC dual connectivity
  • the air interface utilized by WTRUs 102a, 102b, 102c may be characterized by multiple types of radio access technologies and/or transmissions sent to/from multiple types of base stations (e.g., an eNB and a gNB).
  • the base station 114a and the WTRUs 102a, 102b, 102c may implement radio technologies such as IEEE 802.11 (i.e., Wireless Fidelity (WiFi), IEEE 802.16 (i.e., Worldwide Interoperability for Microwave Access (WiMAX)), CDMA2000, CDMA2000 1X, CDMA2000 EV-DO, Interim Standard 2000 (IS-2000), Interim Standard 95 (IS-95), Interim Standard 856 (IS-856), Global System for Mobile communications (GSM), Enhanced Data rates for GSM Evolution (EDGE), GSM EDGE (GERAN), and the like.
  • IEEE 802.11 i.e., Wireless Fidelity (WiFi)
  • IEEE 802.16 i.e., Worldwide Interoperability for Microwave Access (WiMAX)
  • CDMA2000, CDMA2000 1X, CDMA2000 EV-DO Code Division Multiple Access 2000
  • IS-95 Interim Standard 95
  • IS-856 Interim Standard 856
  • GSM Global System for
  • the base station 114b in FIG. 1A may be a wireless router, Home Node B, Home eNode B, or access point, for example, and may utilize any suitable RAT for facilitating wireless connectivity in a localized area, such as a place of business, a home, a vehicle, a campus, an industrial facility, an air corridor (e.g., for use by drones), a roadway, and the like.
  • the base station 114b and the WTRUs 102c, 102d may implement a radio technology such as IEEE 802.11 to establish a wireless local area network (WLAN).
  • WLAN wireless local area network
  • the base station 114b and the WTRUs 102c, 102d may implement a radio technology such as IEEE 802.15 to establish a wireless personal area network (WPAN).
  • the base station 114b and the WTRUs 102c, 102d may utilize a cellular-based RAT (e.g., WCDMA, CDMA2000, GSM, LTE, LTE-A, LTE-A Pro, NR etc.) to establish a picocell or femtocell.
  • the base station 114b may have a direct connection to the Internet 110.
  • the base station 114b may not be required to access the Internet 110 via the CN 106.
  • the RAN 104 may be in communication with the CN 106, which may be any type of network configured to provide voice, data, applications, and/or voice over internet protocol (VoIP) services to one or more of the WTRUs 102a, 102b, 102c, 102d.
  • the data may have varying quality of service (QoS) requirements, such as differing throughput requirements, latency requirements, error tolerance requirements, reliability requirements, data throughput requirements, mobility requirements, and the like.
  • QoS quality of service
  • the CN 106 may provide call control, billing services, mobile location-based services, pre-paid calling, Internet connectivity, video distribution, etc., and/or perform high-level security functions, such as user authentication.
  • the RAN 104 and/or the CN 106 may be in direct or indirect communication with other RANs that employ the same RAT as the RAN 104 or a different RAT.
  • the CN 106 may also be in communication with another RAN (not shown) employing a GSM, UMTS, CDMA 2000, WiMAX, E-UTRA, or WiFi radio technology.
  • the CN 106 may also serve as a gateway for the WTRUs 102a, 102b, 102c, 102d to access the PSTN 108, the Internet 110, and/or the other networks 112.
  • the PSTN 108 may include circuit-switched telephone networks that provide plain old telephone service (POTS).
  • POTS plain old telephone service
  • the Internet 110 may include a global system of interconnected computer networks and devices that use common communication protocols, such as the transmission control protocol (TCP), user datagram protocol (UDP) and/or the internet protocol (IP) in the TCP/IP internet protocol suite.
  • the networks 112 may include wired and/or wireless communications networks owned and/or operated by other service providers.
  • the networks 112 may include another CN connected to one or more RANs, which may employ the same RAT as the RAN 104 or a different RAT.
  • the WTRUs 102a, 102b, 102c, 102d in the communications system 100 may include multi-mode capabilities (e.g., the WTRUs 102a, 102b, 102c, 102d may include multiple transceivers for communicating with different wireless networks over different wireless links).
  • the WTRU 102c shown in FIG. 1A may be configured to communicate with the base station 114a, which may employ a cellular-based radio technology, and with the base station 114b, which may employ an IEEE 802 radio technology.
  • FIG. 1 B is a system diagram illustrating an example WTRU 102. As shown in FIG.
  • the WTRU 102 may include a processor 118, a transceiver 120, a transmit/receive element 122, a speaker/microphone 124, a keypad 126, a display/touchpad 128, non-removable memory 130, removable memory 132, a power source 134, a global positioning system (GPS) chipset 136, and/or other peripherals 138, among others. It will be appreciated that the WTRU 102 may include any sub-combination of the foregoing elements while remaining consistent with an embodiment.
  • GPS global positioning system
  • the processor 118 may be a general purpose processor, a special purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), any other type of integrated circuit (IC), a state machine, and the like.
  • the processor 118 may perform signal coding, data processing, power control, input/output processing, and/or any other functionality that enables the WTRU 102 to operate in a wireless environment.
  • the processor 118 may be coupled to the transceiver 120, which may be coupled to the transmit/receive element 122. While FIG. 1 B depicts the processor 118 and the transceiver 120 as separate components, it will be appreciated that the processor 118 and the transceiver 120 may be integrated together in an electronic package or chip.
  • the transmit/receive element 122 may be configured to transmit signals to, or receive signals from, a base station (e.g., the base station 114a) over the air interface 116.
  • the transmit/receive element 122 may be an antenna configured to transmit and/or receive RF signals.
  • the transmit/receive element 122 may be an emitter/detector configured to transmit and/or receive IR, UV, or visible light signals, for example.
  • the transmit/receive element 122 may be configured to transmit and/or receive both RF and light signals. It will be appreciated that the transmit/receive element 122 may be configured to transmit and/or receive any combination of wireless signals.
  • the WTRU 102 may include any number of transmit/receive elements 122. More specifically, the WTRU 102 may employ MIMO technology. Thus, in one embodiment, the WTRU 102 may include two or more transmit/receive elements 122 (e.g., multiple antennas) for transmitting and receiving wireless signals over the air interface 116.
  • the WTRU 102 may include two or more transmit/receive elements 122 (e.g., multiple antennas) for transmitting and receiving wireless signals over the air interface 116.
  • the transceiver 120 may be configured to modulate the signals that are to be transmitted by the transmit/receive element 122 and to demodulate the signals that are received by the transmit/receive element 122.
  • the WTRU 102 may have multi-mode capabilities.
  • the transceiver 120 may include multiple transceivers for enabling the WTRU 102 to communicate via multiple RATs, such as NR and IEEE 802.11 , for example.
  • the processor 118 of the WTRU 102 may be coupled to, and may receive user input data from, the speaker/microphone 124, the keypad 126, and/or the display/touchpad 128 (e.g., a liquid crystal display (LCD) display unit or organic light-emitting diode (OLED) display unit).
  • the processor 118 may also output user data to the speaker/microphone 124, the keypad 126, and/or the display/touchpad 128.
  • the processor 118 may access information from, and store data in, any type of suitable memory, such as the non-removable memory 130 and/or the removable memory 132.
  • the non-removable memory 130 may include randomaccess memory (RAM), read-only memory (ROM), a hard disk, or any other type of memory storage device.
  • the removable memory 132 may include a subscriber identity module (SIM) card, a memory stick, a secure digital (SD) memory card, and the like.
  • SIM subscriber identity module
  • SD secure digital
  • the processor 118 may access information from, and store data in, memory that is not physically located on the WTRU 102, such as on a server or a home computer (not shown).
  • the processor 118 may receive power from the power source 134, and may be configured to distribute and/or control the power to the other components in the WTRU 102.
  • the power source 134 may be any suitable device for powering the WTRU 102.
  • the power source 134 may include one or more dry cell batteries (e.g., nickel-cadmium (NiCd), nickel-zinc (NiZn), nickel metal hydride (NiMH), lithium-ion (Li-ion), etc.), solar cells, fuel cells, and the like.
  • the processor 118 may also be coupled to the GPS chipset 136, which may be configured to provide location information (e.g., longitude and latitude) regarding the current location of the WTRU 102.
  • location information e.g., longitude and latitude
  • the WTRU 102 may receive location information over the air interface 116 from a base station (e.g., base stations 114a, 114b) and/or determine its location based on the timing of the signals being received from two or more nearby base stations. It will be appreciated that the WTRU 102 may acquire location information by way of any suitable locationdetermination method while remaining consistent with an embodiment.
  • the processor 118 may further be coupled to other peripherals 138, which may include one or more software and/or hardware modules that provide additional features, functionality and/or wired or wireless connectivity.
  • the peripherals 138 may include an accelerometer, an e-compass, a satellite transceiver, a digital camera (for photographs and/or video), a universal serial bus (USB) port, a vibration device, a television transceiver, a hands free headset, a Bluetooth® module, a frequency modulated (FM) radio unit, a digital music player, a media player, a video game player module, an Internet browser, a Virtual Reality and/or Augmented Reality (VR/AR) device, an activity tracker, and the like.
  • FM frequency modulated
  • the peripherals 138 may include one or more sensors.
  • the sensors may be one or more of a gyroscope, an accelerometer, a hall effect sensor, a magnetometer, an orientation sensor, a proximity sensor, a temperature sensor, a time sensor; a geolocation sensor, an altimeter, a light sensor, a touch sensor, a magnetometer, a barometer, a gesture sensor, a biometric sensor, a humidity sensor and the like.
  • the WTRU 102 may include a full duplex radio for which transmission and reception of some or all of the signals (e.g., associated with particular subframes for both the UL (e.g., for transmission) and DL (e.g., for reception) may be concurrent and/or simultaneous.
  • the full duplex radio may include an interference management unit to reduce and or substantially eliminate self-interference via either hardware (e.g., a choke) or signal processing via a processor (e.g., a separate processor (not shown) or via processor 118).
  • the WTRU 102 may include a half-duplex radio for which transmission and reception of some or all of the signals (e.g., associated with particular subframes for either the UL (e.g., for transmission) or the DL (e.g., for reception)).
  • FIG. 1C is a system diagram illustrating the RAN 104 and the CN 106 according to an embodiment.
  • the RAN 104 may employ an E- UTRA radio technology to communicate with the WTRUs 102a, 102b, 102c over the air interface 116.
  • the RAN 104 may also be in communication with the CN 106.
  • the RAN 104 may include eNode-Bs 160a, 160b, 160c, though it will be appreciated that the RAN 104 may include any number of eNode-Bs while remaining consistent with an embodiment.
  • the eNode-Bs 160a, 160b, 160c may each include one or more transceivers for communicating with the WTRUs 102a, 102b, 102c over the air interface 116.
  • the eNode-Bs 160a, 160b, 160c may implement MIMO technology.
  • the eNode-B 160a for example, may use multiple antennas to transmit wireless signals to, and/or receive wireless signals from, the WTRU 102a.
  • Each of the eNode-Bs 160a, 160b, 160c may be associated with a particular cell (not shown) and may be configured to handle radio resource management decisions, handover decisions, scheduling of users in the UL and/or DL, and the like. As shown in FIG. 1C, the eNode-Bs 160a, 160b, 160c may communicate with one another over an X2 interface.
  • the CN 106 shown in FIG. 1C may include a mobility management entity (MME) 162, a serving gateway (SGW) 164, and a packet data network (PDN) gateway (PGW) 166. While the foregoing elements are depicted as part of the CN 106, it will be appreciated that any of these elements may be owned and/or operated by an entity other than the CN operator.
  • MME mobility management entity
  • SGW serving gateway
  • PGW packet data network gateway
  • PGW packet data network gateway
  • the MME 162 may be connected to each of the eNode-Bs 162a, 162b, 162c in the RAN 104 via an S1 interface and may serve as a control node.
  • the MME 162 may be responsible for authenticating users of the WTRUs 102a, 102b, 102c, bearer activation/deactivation, selecting a particular serving gateway during an initial attach of the WTRUs 102a, 102b, 102c, and the like.
  • the MME 162 may provide a control plane function for switching between the RAN 104 and other RANs (not shown) that employ other radio technologies, such as GSM and/or WCDMA.
  • the SGW 164 may be connected to each of the eNode Bs 160a, 160b, 160c in the RAN 104 via the S1 interface.
  • the SGW 164 may generally route and forward user data packets to/from the WTRUs 102a, 102b, 102c.
  • the SGW 164 may perform other functions, such as anchoring user planes during inter-eNode B handovers, triggering paging when DL data is available for the WTRUs 102a, 102b, 102c, managing and storing contexts of the WTRUs 102a, 102b, 102c, and the like.
  • the SGW 164 may be connected to the PGW 166, which may provide the WTRUs 102a, 102b, 102c with access to packet-switched networks, such as the Internet 110, to facilitate communications between the WTRUs 102a, 102b, 102c and IP-enabled devices.
  • packet-switched networks such as the Internet 110
  • the CN 106 may facilitate communications with other networks.
  • the CN 106 may provide the WTRUs 102a, 102b, 102c with access to circuit-switched networks, such as the PSTN 108, to facilitate communications between the WTRUs 102a, 102b, 102c and traditional land-line communications devices.
  • the CN 106 may include, or may communicate with, an IP gateway (e.g., an IP multimedia subsystem (IMS) server) that serves as an interface between the CN 106 and the PSTN 108.
  • IMS IP multimedia subsystem
  • the CN 106 may provide the WTRUs 102a, 102b, 102c with access to the other networks 112, which may include other wired and/or wireless networks that are owned and/or operated by other service providers.
  • the WTRU is described in FIGS. 1A-1 D as a wireless terminal, it is contemplated that in certain representative embodiments that such a terminal may use (e.g., temporarily or permanently) wired communication interfaces with the communication network.
  • the other network 112 may be a WLAN.
  • a WLAN in Infrastructure Basic Service Set (BSS) mode may have an Access Point (AP) for the BSS and one or more stations (STAs) associated with the AP.
  • the AP may have access or an interface to a Distribution System (DS) or another type of wired/wireless network that carries traffic in to and/or out of the BSS.
  • Traffic to STAs that originates from outside the BSS may arrive through the AP and may be delivered to the STAs.
  • Traffic originating from STAs to destinations outside the BSS may be sent to the AP to be delivered to respective destinations.
  • Traffic between STAs within the BSS may be sent through the AP, for example, where the source STA may send traffic to the AP and the AP may deliver the traffic to the destination STA.
  • the traffic between STAs within a BSS may be considered and/or referred to as peer-to-peer traffic.
  • the peer-to-peer traffic may be sent between (e.g., directly between) the source and destination STAs with a direct link setup (DLS).
  • the DLS may use an 802.11 e DLS or an 802.11z tunneled DLS (TDLS).
  • a WLAN using an Independent BSS (IBSS) mode may not have an AP, and the STAs (e.g., all of the STAs) within or using the IBSS may communicate directly with each other.
  • the IBSS mode of communication may sometimes be referred to herein as an “ad-hoc” mode of communication.
  • the AP may transmit a beacon on a fixed channel, such as a primary channel.
  • the primary channel may be a fixed width (e.g., 20 MHz wide bandwidth) or a dynamically set width.
  • the primary channel may be the operating channel of the BSS and may be used by the STAs to establish a connection with the AP.
  • Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) may be implemented, for example in 802.11 systems.
  • the STAs e.g., every STA, including the AP, may sense the primary channel. If the primary channel is sensed/detected and/or determined to be busy by a particular STA, the particular STA may back off.
  • One STA (e.g., only one station) may transmit at any given time in a given BSS.
  • High Throughput (HT) STAs may use a 40 MHz wide channel for communication, for example, via a combination of the primary 20 MHz channel with an adjacent or nonadjacent 20 MHz channel to form a 40 MHz wide channel.
  • VHT STAs may support 20MHz, 40 MHz, 80 MHz, and/or 160 MHz wide channels.
  • the 40 MHz, and/or 80 MHz, channels may be formed by combining contiguous 20 MHz channels.
  • a 160 MHz channel may be formed by combining 8 contiguous 20 MHz channels, or by combining two noncontiguous 80 MHz channels, which may be referred to as an 80+80 configuration.
  • the data, after channel encoding may be passed through a segment parser that may divide the data into two streams.
  • Inverse Fast Fourier Transform (IFFT) processing, and time domain processing may be done on each stream separately.
  • IFFT Inverse Fast Fourier Transform
  • the streams may be mapped on to the two 80 MHz channels, and the data may be transmitted by a transmitting STA.
  • the above described operation for the 80+80 configuration may be reversed, and the combined data may be sent to the Medium Access Control (MAC).
  • MAC Medium Access Control
  • Sub 1 GHz modes of operation are supported by 802.11af and 802.11 ah.
  • the channel operating bandwidths, and carriers, are reduced in 802.11af and 802.11 ah relative to those used in 802.11n, and 802.11 ac.
  • 802.11af supports 5 MHz, 10 MHz, and 20 MHz bandwidths in the TV White Space (TVWS) spectrum
  • 802.11 ah supports 1 MHz, 2 MHz, 4 MHz, 8 MHz, and 16 MHz bandwidths using non-TVWS spectrum.
  • 802.11ah may support Meter Type Control/Machine-Type Communications (MTC), such as MTC devices in a macro coverage area.
  • MTC devices may have certain capabilities, for example, limited capabilities including support for (e.g., only support for) certain and/or limited bandwidths.
  • the MTC devices may include a battery with a battery life above a threshold (e.g., to maintain a very long battery life).
  • WLAN systems which may support multiple channels, and channel bandwidths, such as 802.11 n, 802.11 ac, 802.11 af, and 802.11 ah, include a channel which may be designated as the primary channel.
  • the primary channel may have a bandwidth equal to the largest common operating bandwidth supported by all STAs in the BSS.
  • the bandwidth of the primary channel may be set and/or limited by a STA, from among all STAs in operating in a BSS, which supports the smallest bandwidth operating mode.
  • the primary channel may be 1 MHz wide for STAs (e.g., MTC type devices) that support (e.g., only support) a 1 MHz mode, even if the AP, and other STAs in the BSS support 2 MHz, 4 MHz, 8 MHz, 16 MHz, and/or other channel bandwidth operating modes.
  • Carrier sensing and/or Network Allocation Vector (NAV) settings may depend on the status of the primary channel. If the primary channel is busy, for example, due to a STA (which supports only a 1 MHz operating mode) transmitting to the AP, all available frequency bands may be considered busy even though a majority of the available frequency bands remains idle.
  • STAs e.g., MTC type devices
  • NAV Network Allocation Vector
  • the available frequency bands which may be used by 802.11 ah, are from 902 MHz to 928 MHz. In Korea, the available frequency bands are from 917.5 MHz to 923.5 MHz. In Japan, the available frequency bands are from 916.5 MHz to 927.5 MHz. The total bandwidth available for 802.11 ah is 6 MHz to 26 MHz depending on the country code.
  • FIG. 1 D is a system diagram illustrating the RAN 104 and the CN 106 according to an embodiment.
  • the RAN 104 may employ an NR radio technology to communicate with the WTRUs 102a, 102b, 102c over the air interface 116.
  • the RAN 104 may also be in communication with the CN 106.
  • the RAN 104 may include gNBs 180a, 180b, 180c, though it will be appreciated that the RAN 104 may include any number of gNBs while remaining consistent with an embodiment.
  • the gNBs 180a, 180b, 180c may each include one or more transceivers for communicating with the WTRUs 102a, 102b, 102c over the air interface 116.
  • the gNBs 180a, 180b, 180c may implement MIMO technology.
  • gNBs 180a, 108b may utilize beamforming to transmit signals to and/or receive signals from the gNBs 180a, 180b, 180c.
  • the gNB 180a may use multiple antennas to transmit wireless signals to, and/or receive wireless signals from, the WTRU 102a.
  • the gNBs 180a, 180b, 180c may implement carrier aggregation technology.
  • the gNB 180a may transmit multiple component carriers to the WTRU 102a (not shown). A subset of these component carriers may be on unlicensed spectrum while the remaining component carriers may be on licensed spectrum.
  • the gNBs 180a, 180b, 180c may implement Coordinated MultiPoint (CoMP) technology.
  • WTRU 102a may receive coordinated transmissions from gNB 180a and gNB 180b (and/or gNB 180c).
  • CoMP Coordinated MultiPoint
  • the WTRUs 102a, 102b, 102c may communicate with gNBs 180a, 180b, 180c using transmissions associated with a scalable numerology. For example, the OFDM symbol spacing and/or OFDM subcarrier spacing may vary for different transmissions, different cells, and/or different portions of the wireless transmission spectrum.
  • the WTRUs 102a, 102b, 102c may communicate with gNBs 180a, 180b, 180c using subframe or transmission time intervals (TTIs) of various or scalable lengths (e.g., containing a varying number of OFDM symbols and/or lasting varying lengths of absolute time).
  • TTIs subframe or transmission time intervals
  • the gNBs 180a, 180b, 180c may be configured to communicate with the WTRUs 102a, 102b, 102c in a standalone configuration and/or a non-standalone configuration.
  • WTRUs 102a, 102b, 102c may communicate with gNBs 180a, 180b, 180c without also accessing other RANs (e.g., such as eNode-Bs 160a, 160b, 160c).
  • WTRUs 102a, 102b, 102c may utilize one or more of gNBs 180a, 180b, 180c as a mobility anchor point.
  • WTRUs 102a, 102b, 102c may communicate with gNBs 180a, 180b, 180c using signals in an unlicensed band.
  • WTRUs 102a, 102b, 102c may communicate with/connect to gNBs 180a, 180b, 180c while also communicating with/connecting to another RAN such as eNode-Bs 160a, 160b, 160c.
  • WTRUs 102a, 102b, 102c may implement DC principles to communicate with one or more gNBs 180a, 180b, 180c and one or more eNode-Bs 160a, 160b, 160c substantially simultaneously.
  • eNode-Bs 160a, 160b, 160c may serve as a mobility anchor for WTRUs 102a, 102b, 102c and gNBs 180a, 180b, 180c may provide additional coverage and/or throughput for servicing WTRUs 102a, 102b, 102c.
  • Each of the gNBs 180a, 180b, 180c may be associated with a particular cell (not shown) and may be configured to handle radio resource management decisions, handover decisions, scheduling of users in the UL and/or DL, support of network slicing, DC, interworking between NR and E-UTRA, routing of user plane data towards User Plane Function (UPF) 184a, 184b, routing of control plane information towards Access and Mobility Management Function (AMF) 182a, 182b and the like. As shown in FIG. 1 D, the gNBs 180a, 180b, 180c may communicate with one another over an Xn interface.
  • UPF User Plane Function
  • AMF Access and Mobility Management Function
  • the CN 106 shown in FIG. 1 D may include at least one AMF 182a, 182b, at least one UPF 184a, 184b, at least one Session Management Function (SMF) 183a, 183b, and possibly a Data Network (DN) 185a, 185b. While the foregoing elements are depicted as part of the CN 106, it will be appreciated that any of these elements may be owned and/or operated by an entity other than the CN operator.
  • SMF Session Management Function
  • the AMF 182a, 182b may be connected to one or more of the gNBs 180a, 180b, 180c in the RAN 104 via an N2 interface and may serve as a control node.
  • the AMF 182a, 182b may be responsible for authenticating users of the WTRUs 102a, 102b, 102c, support for network slicing (e.g., handling of different protocol data unit (PDU) sessions with different requirements), selecting a particular SMF 183a, 183b, management of the registration area, termination of non-access stratum (NAS) signaling, mobility management, and the like.
  • PDU protocol data unit
  • Network slicing may be used by the AMF 182a, 182b in order to customize CN support for WTRUs 102a, 102b, 102c based on the types of services being utilized WTRUs 102a, 102b, 102c.
  • different network slices may be established for different use cases such as services relying on ultra-reliable low latency (URLLC) access, services relying on enhanced massive mobile broadband (eMBB) access, services for MTC access, and the like.
  • URLLC ultra-reliable low latency
  • eMBB enhanced massive mobile broadband
  • the AMF 182a, 182b may provide a control plane function for switching between the RAN 104 and other RANs (not shown) that employ other radio technologies, such as LTE, LTE-A, LTE-A Pro, and/or non-3GPP access technologies such as WiFi.
  • radio technologies such as LTE, LTE-A, LTE-A Pro, and/or non-3GPP access technologies such as WiFi.
  • the SMF 183a, 183b may be connected to an AMF 182a, 182b in the CN 106 via an N11 interface.
  • the SMF 183a, 183b may also be connected to a UPF 184a, 184b in the CN 106 via an N4 interface.
  • the SMF 183a, 183b may select and control the UPF 184a, 184b and configure the routing of traffic through the UPF 184a, 184b.
  • the SMF 183a, 183b may perform other functions, such as managing and allocating UE IP address, managing PDU sessions, controlling policy enforcement and QoS, providing DL data notifications, and the like.
  • a PDU session type may be IP-based, non-IP based, Ethernet-based, and the like.
  • the UPF 184a, 184b may be connected to one or more of the gNBs 180a, 180b, 180c in the RAN 104 via an N3 interface, which may provide the WTRUs 102a, 102b, 102c with access to packet-switched networks, such as the Internet 110, to facilitate communications between the WTRUs 102a, 102b, 102c and IP- enabled devices.
  • the UPF 184, 184b may perform other functions, such as routing and forwarding packets, enforcing user plane policies, supporting multi-homed PDU sessions, handling user plane QoS, buffering DL packets, providing mobility anchoring, and the like.
  • the CN 106 may facilitate communications with other networks.
  • the CN 106 may include, or may communicate with, an IP gateway (e.g., an IP multimedia subsystem (IMS) server) that serves as an interface between the CN 106 and the PSTN 108.
  • IMS IP multimedia subsystem
  • the CN 106 may provide the WTRUs 102a, 102b, 102c with access to the other networks 112, which may include other wired and/or wireless networks that are owned and/or operated by other service providers.
  • the WTRUs 102a, 102b, 102c may be connected to a local DN 185a, 185b through the UPF 184a, 184b via the N3 interface to the UPF 184a, 184b and an N6 interface between the UPF 184a, 184b and the DN 185a, [0069] In view of FIGs. 1A-1 D, and the corresponding description of FIGs.
  • WTRU 102a-d one or more, or all, of the functions described herein with regard to one or more of: WTRU 102a-d, Base Station 114a-b, eNode-B 160a-c, MME 162, SGW 164, PGW 166, gNB 180a-c, AMF 182a-b, UPF 184a-b, SMF 183a-b, DN 185a-b, and/or any other device(s) described herein, may be performed by one or more emulation devices (not shown).
  • the emulation devices may be one or more devices configured to emulate one or more, or all, of the functions described herein.
  • the emulation devices may be used to test other devices and/or to simulate network and/or WTRU functions.
  • the emulation devices may be designed to implement one or more tests of other devices in a lab environment and/or in an operator network environment.
  • the one or more emulation devices may perform the one or more, or all, functions while being fully or partially implemented and/or deployed as part of a wired and/or wireless communication network in order to test other devices within the communication network.
  • the one or more emulation devices may perform the one or more, or all, functions while being temporarily implemented/deployed as part of a wired and/or wireless communication network.
  • the emulation device may be directly coupled to another device for purposes of testing and/or performing testing using over-the-air wireless communications.
  • the one or more emulation devices may perform the one or more, including all, functions while not being implemented/deployed as part of a wired and/or wireless communication network.
  • the emulation devices may be utilized in a testing scenario in a testing laboratory and/or a non-deployed (e.g., testing) wired and/or wireless communication network in order to implement testing of one or more components.
  • the one or more emulation devices may be test equipment. Direct RF coupling and/or wireless communications via RF circuitry (e.g., which may include one or more antennas) may be used by the emulation devices to transmit and/or receive data.
  • RF circuitry e.g., which may include one or more antennas
  • SL sensing is applied for SL PSSCH/PSCCH resource selection and includes full sensing, partial sensing and random selection.
  • a WTRU evaluate all candidate resources within a resource selection window (RSW) to select available candidate resources.
  • a WTRU may perform periodical-based partial sensing (PBPS) and contiguous partial sensing (CPS) and only a portion of candidate resources are evaluated for availability. Parameters related to partial sensing (e.g., sensing occasion periodicity and number of CPS sensing slots) are indicated by higher layers.
  • PBPS periodical-based partial sensing
  • CPS contiguous partial sensing
  • Parameters related to partial sensing e.g., sensing occasion periodicity and number of CPS sensing slots
  • a WTRU may not evaluate the availability of any candidate resource within a RSW and randomly select SL transmission resources. Partial sensing and random selection are intended for WTRU power saving purpose and therefore, may be referred to as power saving sensing.
  • a SL transmission in the selected resources may collide with another SL transmission, especially in a congested condition.
  • the reduced number of candidate resources for evaluation in partial sensing and performing no evaluation in random selection provides significant power saving but degrades the reliability of the SL transmission due to significantly increased probability of SL transmission collisions in the selected resources.
  • a SL-PRS Scheme 2 resource selection based on the SL Mode 2 legacy sensing may inherit the problem of SL collisions in the selected resources. The problem is exacerbated when using power saving sensing and/or selecting a SL- PRS resource with a large bandwidth. To achieve high SL positioning accuracy, a robust SL-PRS transmission is necessary and thus mechanisms are desirable to minimize collisions between SL-PRS transmissions or between SL-PRS transmission and SL data transmission and enhance the reliability of the SL-PRS transmissions based on Scheme 2 sensing.
  • a SL-PRS transmission may experience “near-far” interference when RE- level orthogonal multiplexing is applied between SL-PRS transmissions from different WTRUs.
  • a similar situation in Uu positioning is handled with gNB muting in which a nearby gNB configures with muting of certain DL-PRS resources (i.e. , no DL-PRS transmissions at muted DL-PRS resources to allow a WTRU to receive DL-PRS transmissions from another distant gNB).
  • a WTRU may not able to receive a weak DL-PRS transmission from the distant gNB due to the limited receiver dynamic range, even when the DL-PRS transmission from the nearby gNB are orthogonal at RE level.
  • This type of interference may become more dynamic for SL-PRS transmission due to the WTRU mobility and thus mechanisms are desired to address this problem.
  • a SL-PRS resource of a large bandwidth that is selected based on Scheme 2 WTRU autonomous resource selection may be subject to high and fragmented interference.
  • a WTRU may perform a signal processing (herein referred to as, “splicing”) to combine and synthesize multiple SL-PRS transmission of small bandwidth to a single wideband SL-PRS signal to achieve desired positioning accuracy.
  • a WTRU may perform a set of N SL-PRS transmissions in a SL-PRS transmission aggregation.
  • a SL-PRS transmission aggregation may include sequentially N SL-PRS transmission, which may be referred to as a SL-PRS hop.
  • FIG. 2 illustrates an example diagram of SL-PRS transmission aggregation.
  • WTRU 202 may perform a resource selection for a SL-PRS transmission over a (pre)configured bandwidth of 1/1/ MHz.
  • WTRU 202 may detect a high interference in part (e.g., a set of sub-carriers and/or PRBs) of the selected SL-PRS bandwidth (e.g., based on RSRP and/or RSSI measurement).
  • WTRU 202 may perform a resource re-selection of the SL-PRS transmission and select 2 resources.
  • Each resource may be equal to a sum of a half of the (pre)configured SL-PRS bandwidth (W/2) MHz and a (pre)configured overlapping bandwidth.
  • the purpose of the overlapping bandwidth may be to enable a coherent combining of the two bandwidths into a large bandwidth in the receiver signal processing of WTRU 204.
  • the two resources may be within a (pre)configured time gap to ensure a required coherent combining performance.
  • WTRU 202 may transmit two SL-PRS transmissions in the selected resources and indicate the applied bandwidth aggregation (e.g., in SCI).
  • WTRU 204 may perform signal processing (e.g., splicing) to aggregate the received two SL-PRS transmissions into a SL-PRS over the initial (pre)configured bandwidth of 1/1/ MHz for further positioning measurement.
  • a WTRU may be triggered to perform resource (re)selection for N SL-PRS hops for a SL-PRS transmission aggregation of a total bandwidth of 1/1/ Hz when one of the following occurs:
  • a WTRU may be triggered to perform resource (re)selection for N SL-PRS hops for a SL-PRS transmission aggregation of a total bandwidth of l/l/ Hz when the WTRU detects an interference within a resource selected for a SL-PRS with a bandwidth (l/l/ Hz).
  • the RSRP measured of a detected SCI with the resource may exceed a (pre)configured threshold.
  • a WTRU may be triggered to perform resource (re)selection for N SL-PRS hops for a SL-PRS transmission aggregation of a total bandwidth of l/l/ Hz when the number of RSRP increments in the resource selection exceed a (pre)configured threshold.
  • a WTRU may be triggered to perform resource (re)selection for N SL-PRS hops for a SL-PRS transmission aggregation of a total bandwidth of l/l/ Hz when the measured RSSI of the selected resource and/or the measured RSRP of SCI detected within the selected resource exceed a (pre)configured threshold.
  • a WTRU may be triggered to perform resource (re)selection for N SL-PRS hops for a SL-PRS transmission aggregation of a total bandwidth of l/l/ Hz when the measured SL CBR of the resource pool exceeds a (pre)configured threshold.
  • a WTRU may be triggered to perform resource (re)selection for N SL-PRS hops for a SL-PRS transmission aggregation of a total bandwidth of l/l/ Hz when one or more SL measurement metric(s) reported by peer WTRUs in a SL positioning (e.g. SL RSRP and/or SL CQI) are be below a (pre)configured threshold. In another example, reported RSSI measurement may exceed a (pre)configured threshold.
  • SL measurement metric(s) reported by peer WTRUs in a SL positioning e.g. SL RSRP and/or SL CQI
  • a WTRU may be triggered to perform resource (re)selection for N SL-PRS hops for a SL-PRS transmission aggregation of a total bandwidth of 1/1/ Hz when the WTRU receives a set of IUC non-prefer resource set from a peer WTRU in a SL positioning group and the ratio of the number of received non-preferred resources to the number of total candidate resources in the RSW exceeds a (pre)configured threshold.
  • a WTRU may be triggered to perform resource (re)selection for N SL-PRS hops for a SL-PRS transmission aggregation of a total bandwidth of 1/1/ Hz when the WTRU receives a conflict indication in a PSFCH to indicate a conflict between a selected SL-PRS resource of l/l/-MHz bandwidth and another WTRU’s resource reservation for a SL transmission.
  • a WTRU may be triggered to perform resource (re)selection for N SL-PRS hops for a SL-PRS transmission aggregation of a total bandwidth of 1/1/ Hz when the WTRU receives a feedback associated with a performed SL-PRS transmission using a selected SL-PRS resource of l/IZ-MHz bandwidth and the feedback information may be a request for SL-PRS re-transmission and/or a measured SL- PRS transmission RSRP below a (pre)configured threshold.
  • a WTRU may perform a resource (re)selection to select N SL-PRS resources.
  • a WTRU may determine the bandwidth of a SL-PRS hop based on the bandwidth of the aggregated SL-PRS transmissions (1/1/ MHz) and/or a (pre)configured overlapping frequency bandwidth of bandwidth (Woveriap MHz).
  • a WTRU may estimate, for example, phase shift over the same sub-carriers to determine a compensation factor in coherent combining.
  • a large overlapping frequency bandwidth may provide better splicing performance at the expensed of resource overhead.
  • a WTRU may be (pre)configured with a set of overlapping frequency bandwidth with each bandwidth associated with a positioning method and/or required positioning accuracy.
  • a WTRU may determine an overlapping bandwidth based on the positioning method and/or required positioning accuracy of the SL-PRS transmission.
  • a WTRU may determine a time gap (T gap ) between the SL- PRS hops of the SL-PRS transmission aggregation. As WTRU timing and phase reference may drift over time, a small time gap may benefit splicing performance. Thus, in one example, a WTRU may be (pre)configured with a set of time gap values associated with positioning method and/or required positioning accuracy. A WTRU may determine a time gap based on the positioning method and/or required positioning accuracy of the SL-PRS transmission.
  • a WTRU may be (pre)configured with a set of coupled overlapping bandwidth and time gap values.
  • a smaller time gap may incur smaller phase and time shift and as a result, a smaller overlapping bandwidth may be required.
  • a WTRU may determine a frequency bandwidth of each SL-hop resource based on the determined overlapping bandwidth Woveriap MHz), the number of aggregation (N) and the total (pre)configured bandwidth (H/MHz).
  • the resulted SL- hop resource bandwidth may be (W/N + Woveriap) MHz.
  • a WTRU may perform a Mode 2 sensing to select the SL-PRS hop resources of the determined SL-hop resource bandwidth and time gap.
  • a WTRU may determine a set of time gap and its associated overlapping frequency bandwidth values for a SL-PRS transmission aggregation.
  • a small time gap value may be associated with a small overlapping frequency bandwidth, because the time and phase drift may be small during the time gap and the number of required frequency resources (e.g. number of subcarriers and/or PRBs) for time and phase estimate for coherent combining of SL- hops may accordingly be small.
  • a large time gap value may be associated with a large overlapping frequency bandwidth.
  • a WTRU may perform multiple resource (re)selections (sensing) using each determined set of time gaps and SL-hop resource bandwidths.
  • a WTRU may select the SL-PRS hop resources using one set of time gaps and SL-hop resource bandwidths based on each sensing result. For example, a WTRU may select the SL-hop resources from the sensing that may have the lowest number of RSRP increments, i.e., the lowest RSRP threshold value used for exclusion.
  • a WTRU may use the RSRP increment value to exclude resources from selection.
  • a WTRU may increment the RSRP threshold value continuously until the number of selected resources reach X% of the total resources.
  • large RSRP increments and thereby a high RSRP threshold for exclusion may result in high interference in the selected resources.
  • a WTRU may perform a SL-hop in each of the selected N resources.
  • a WTRU may include one or more of the following information in SCI pertaining to the SL-PRS transmission aggregation: (1 ) an indication of SL-PRS transmission aggregation; (2) number of SL-PRS hops; (3) index of a SL-PRS hop; (4) the overlapping bandwidth, e.g. number of RBs and/or sub-channels; (5) the time gap between SL-PRS hops, e.g. number of symbols and/or SL logical slot; (6) SL-PRS comb pattern in each SL-PRS hop; and/or (7) priority of the SL-PRS hop.
  • a WTRU may include the determined SL-PRS hop resource information in a buffer status request (BSR) transmission to the network.
  • BSR buffer status request
  • a WTRU may include the determined SL-PRS hop resource information in a buffer status request (BSR) transmission to the network.
  • a WTRU may receive a SL-PRS transmission aggregation (pre)configu ration information including: (1 ) number of aggregated transmissions (N); (2) a set of aggregation parameters associated with SL positioning method and/or requirement, (e.g., time gaps between aggregated SL- PRS transmissions (Tgap), overlapping bandwidths between aggregated SL-PRS transmissions (H/overiap); or (3) RSRP and CBR thresholds to trigger SL-PRS transmission aggregation.
  • pre SL-PRS transmission aggregation
  • N number of aggregated transmissions
  • Tgap time gaps between aggregated SL- PRS transmissions
  • H/overiap overlapping bandwidths between aggregated SL-PRS transmissions
  • RSRP and CBR thresholds to trigger SL-PRS transmission aggregation.
  • the WTRU may perform a resource selection for a SL-PRS transmission over a (pre)configured bandwidth of H/MHz.
  • the WTRU may then be triggered to perform SL-PRS transmission aggregation if one or more of the following conditions are met: (1 ) a detected interference RSRP level in the selected resource exceeds a (pre)configured threshold; (2) a RSRP applied in the resource selection exceeds a (pre)configured threshold; (3) a measured SL CBR exceeds a (pre)configured threshold; (4) a received SL-PRS transmission feedback indicates re-transmission request and/or conflict indication.
  • the WTRU may determines an aggregation overlapping bandwidth (l/Voveriap) and time gap (7ga P ) based on the received pre-configuration and SL positioning method and/or requirement associated with the SL-PRS transmission.
  • the WTRU may performs a resource re-selection for A/ aggregation resources for each.
  • the bandwidth of each aggregation resource is the sum of one Nth of the (pre)configured bandwidth (H/ MHz) (i.e. W/N + H/overiap MHz).
  • the time between aggregation resources is the determined time gap (Tga P ).
  • the WTRU may transmits N SL-PRS aggregation transmissions in the selected aggregation resources, including SCI indication of transmission aggregation, index of aggregated transmission and time gap.
  • Fig. 3 is a flowchart illustrating an exemplary procedure 300 for aggregating SL-PRS transmissions.
  • a WTRU may receive a configuration information, the configuration information including sidelink-position reference signal (SL-PRS) transmission aggregation information.
  • the WTRU may select a first resource for a SL-PRS transmission, the SL-PRS transmission being over a first SL-PRS bandwidth.
  • the WTRU may, on a condition that a measured interference reference signal received power (RSRP) level in the selected first resource exceeds a RSRP threshold, determine a second SL-PRS bandwidth.
  • RSRP measured interference reference signal received power
  • the WTRU may, based on the SL-PRS transmission aggregation information, select a second resource and third resource for two SL-PRS transmissions, each SL-PRS transmission being over the second SL-PRS bandwidth.
  • the WTRU may transmit, using the selected second resource and third resource, the two SL-PRS transmissions.
  • ROM read only memory
  • RAM random access memory
  • register cache memory
  • semiconductor memory devices magnetic media such as internal hard disks and removable disks, magneto-optical media, and optical media such as CD-ROM disks, and digital versatile disks (DVDs).
  • a processor in association with software may be used to implement a radio frequency transceiver for use in a WTRU, UE, terminal, base station, RNC, or any host computer.

Landscapes

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

Abstract

Un procédé réalisé par une unité d'émission/de réception sans fil (WTRU) peut comprendre : la réception d'informations de configuration, les informations de configuration comprenant des informations d'agrégation de transmission de signal de référence de position de liaison latérale (SL-PRS) ; la sélection d'une première ressource pour une transmission de SL-PRS, la transmission de SL-PRS étant sur une première bande passante de SL-PRS ; à condition qu'un niveau de puissance reçue de signal de référence de brouillage (RSRP) mesuré dans la première ressource sélectionnée dépasse un seuil de RSRP, la détermination d'une seconde bande passante de SL-PRS ; sur la base des informations d'agrégation de transmission de SL-PRS, la sélection d'une deuxième ressource et d'une troisième ressource pour deux transmissions de SL-PRS, chaque transmission de SL-PRS étant sur la seconde bande passante de SL-PRS ; et la transmission, à l'aide de la deuxième ressource et de la troisième ressource sélectionnées, des deux transmissions de SL-PRS.
PCT/US2024/015399 2023-02-14 2024-02-12 Procédés et appareil d'agrégation de transmission de sl-prs Ceased WO2024173254A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202363445475P 2023-02-14 2023-02-14
US63/445,475 2023-02-14

Publications (1)

Publication Number Publication Date
WO2024173254A1 true WO2024173254A1 (fr) 2024-08-22

Family

ID=90368598

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2024/015399 Ceased WO2024173254A1 (fr) 2023-02-14 2024-02-12 Procédés et appareil d'agrégation de transmission de sl-prs

Country Status (1)

Country Link
WO (1) WO2024173254A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022031974A1 (fr) * 2020-08-05 2022-02-10 Idac Holdings, Inc. Procédés de configuration de signal de référence dans des systèmes sans fil
US20230015004A1 (en) * 2021-07-19 2023-01-19 Qualcomm Incorporated Sidelink positioning reference signal transmissions

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022031974A1 (fr) * 2020-08-05 2022-02-10 Idac Holdings, Inc. Procédés de configuration de signal de référence dans des systèmes sans fil
US20230015004A1 (en) * 2021-07-19 2023-01-19 Qualcomm Incorporated Sidelink positioning reference signal transmissions

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TORSTEN WILDSCHEK ET AL: "Potential solutions for SL positioning", vol. 3GPP RAN 1, no. Toulouse, FR; 20221114 - 20221118, 7 November 2022 (2022-11-07), XP052221395, Retrieved from the Internet <URL:https://www.3gpp.org/ftp/TSG_RAN/WG1_RL1/TSGR1_111/Docs/R1-2210832.zip R1-2210832-Nokia-SLpos-PotentialSolutions.docx> [retrieved on 20221107] *

Similar Documents

Publication Publication Date Title
US12237928B2 (en) Sidelink resource sensing using feedback channels
US20240188153A1 (en) Nr positioning - methods for resource provision in sidelink positioning
US11388681B2 (en) Dynamic interference management in NR dynamic TDD systems
US12022436B2 (en) Control information transmission and sensing in wireless systems
US12156254B2 (en) Sidelink collision detection and indication
CN119728035A (zh) 用于侧链路发射-接收距离确定的方法
US12323844B2 (en) Methods and apparatus for enabling frequency layers for positioning
CN117957461A (zh) 在未许可频谱中实现定位
AU2023261875A1 (en) Fbe channel access in sidelink unlicensed
US20250358752A1 (en) S_ssb frequency hopping for robust sidelink in contested and congested environments
WO2024173254A1 (fr) Procédés et appareil d&#39;agrégation de transmission de sl-prs
WO2024173241A1 (fr) Procédés et appareil de détection dynamique de schéma d&#39;attribution de ressources sl-prs
WO2024173239A1 (fr) Blocage de transmission de liaison latérale
EP4666754A1 (fr) Blocage de transmission de liaison latérale
WO2024211428A1 (fr) Procédés et appareils pour une wtru de synchronisation pour indiquer des ensembles rb utilisés aux fins d&#39;une transmission ssb
TW202439848A (zh) 適應性上行鏈路頻率跳躍
WO2025212343A1 (fr) Procédés et appareil de mappage de bloc de signal de synchronisation sur une occasion de rach dans des systèmes en duplex intégral sans chevauchement de sous-bande
EP4666528A2 (fr) Saut de fréquence de liaison montante adaptatif
WO2024173141A1 (fr) Sélection de motif de saut pour saut de fréquence de liaison montante adaptatif
WO2024211403A1 (fr) Commande de puissance de transmission de prach sur la base de mesures d&#39;une cellule
WO2025080289A2 (fr) Évitement de collision pour saut de fréquence de liaison montante adaptatif
WO2024211424A1 (fr) Procédés et appareils pour utiliser des ressources réservées de liaison latérale pour déterminer un ou plusieurs ensembles de rb pour une transmission ssb
WO2024211399A1 (fr) Commande de puissance de transmission de prach sur la base d&#39;une différence de temps entre des ordres de pdcch
WO2024211401A1 (fr) Commande de puissance de transmission de prach avec un indice de transmission dans un ordre de pdcch
WO2024211426A1 (fr) Procédés et appareils pour une wtru d&#39;émission pour identifier une wtru de synchronisation et demander une émission s-ssb sur un ou plusieurs ensembles de rb

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24713148

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE