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WO2025041063A1 - Transmission de signal de référence de positionnement de liaison latérale sans licence et attribution de ressources - Google Patents

Transmission de signal de référence de positionnement de liaison latérale sans licence et attribution de ressources Download PDF

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Publication number
WO2025041063A1
WO2025041063A1 PCT/IB2024/058147 IB2024058147W WO2025041063A1 WO 2025041063 A1 WO2025041063 A1 WO 2025041063A1 IB 2024058147 W IB2024058147 W IB 2024058147W WO 2025041063 A1 WO2025041063 A1 WO 2025041063A1
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WO
WIPO (PCT)
Prior art keywords
prs
resource allocation
sidelink
allocation configuration
processor
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/IB2024/058147
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English (en)
Inventor
Robin Rajan THOMAS
Karthikeyan Ganesan
Alexander Golitschek Edler Von Elbwart
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Lenovo Singapore Pte Ltd
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Lenovo Singapore Pte Ltd
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Filing date
Publication date
Priority claimed from US18/810,095 external-priority patent/US20250070943A1/en
Application filed by Lenovo Singapore Pte Ltd filed Critical Lenovo Singapore Pte Ltd
Publication of WO2025041063A1 publication Critical patent/WO2025041063A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H04L5/0091—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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Definitions

  • the present disclosure relates to wireless communications, and more specifically to sidelink positioning.
  • a wireless communications system may include one or multiple network communication devices, such as base stations, which may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE), or other suitable terminology.
  • the wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers, or the like).
  • the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G)).
  • a wireless communications system can include techniques for determining device position, such as a location of a UE.
  • the current techniques specify and support sidelink positioning reference signal (SL-PRS) transmissions in licensed and intelligent transportation systems (ITS) spectrum bands.
  • S-PRS sidelink positioning reference signal
  • ITS intelligent transportation systems
  • current device positioning techniques such as for sidelink positioning, can have limited bandwidth availability, resulting in a slow response and/or inaccurate indications of device location.
  • the phrase “based on” shall not be construed as a reference to a closed set of conditions.
  • an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure.
  • the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on”.
  • a “set” may include one or more elements.
  • Some implementations of the method and apparatuses described herein may further include a UE for wireless communication.
  • the UE receives a resource allocation configuration to perform SL-PRS transmission over unlicensed carriers, where the resource allocation configuration includes at least resource block (RB) sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs.
  • the UE transmits at least one SL-PRS over an unlicensed carrier based at least in part on the resource allocation configuration.
  • the UE transmits the at least one SL-PRS over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the UE transmits multiple SL-PRSs over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the UE transmits a resource allocation configuration request, and in response, receives the resource allocation configuration.
  • the resource allocation configuration is pre-configured by at least one of the UE or a communication device.
  • the UE is at least one of a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside unit.
  • the UE transmits the at least one SL-PRS over the unlicensed carrier to a communication device, the communication device being at least one of a base station, a location server, a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside-unit.
  • the resource allocation configuration indicates a shared resource pool structure with at least one of RB sets defined for SL-PRS and associated sidelink control information, or the RB sets defined for sidelink data and the associated sidelink control information.
  • the resource allocation configuration indicates a shared resource pool structure with RB sets defined for SL-PRS, sidelink data, and associated sidelink control information.
  • the resource allocation configuration indicates a dedicated resource pool structure with RB sets defined for SL-PRS and associated sidelink control information.
  • the resource allocation configuration comprises at least one of a sidelink bandwidth part (BWP), a sidelink positioning resource pool defined in terms of the RB sets, a SL-PRS bandwidth indication, or an indication of contiguous physical resource block (PRB) resource allocation or interlaced PRS resource allocation.
  • BWP sidelink bandwidth part
  • PRB physical resource block
  • a sidelink positioning RB set configuration comprises at least one of multiple SL-PRS resource identifiers (IDs), SL-PRS resource set IDs, SL-PRS transmission-reception point IDs, SL-PRS comb offsets and associated SL-PRS comb sizes, SL-PRS starting symbols and a number of SL-PRS symbols, a number of subchannels, or a channel size.
  • IDs SL-PRS resource identifiers
  • SL-PRS resource set IDs SL-PRS transmission-reception point IDs
  • SL-PRS comb offsets and associated SL-PRS comb sizes SL-PRS starting symbols and a number of SL-PRS symbols, a number of subchannels, or a channel size.
  • a sidelink positioning RB set configuration comprises multiple interlaced transmissions for SL-PRS RB sets with a number of interlaces that are equally spaced according to a parameter that indicates the number of interlaces or RBs between each of
  • the sidelink positioning RB set configuration is associated with different sidelink positioning transmitters differentiated by IDs comprising at least one of a source- ID, a session-ID, a destination-ID, a unique layer- 1 ID, or a unique layer-2 ID.
  • Signaling for the resource allocation configuration includes at least one of a lower-layer UE-specific signaling, a higher-layer UE-specific signaling, or broadcast signaling.
  • Intra-cell guard bands are configured for sidelink data or the SL-PRS transmission.
  • At least one of a transmit frequency hopping for SL-PRS or a receive frequency hopping for SL-PRS is enabled across the RB sets based at least in part on a received frequency hopping configuration comprising one or more sidelink positioning measurements corresponding to at least one of one or more hops, a time between the one or more hops, a same numerology and bandwidth among the one or more hops, a different numerology and bandwidth among the one or more hops, or a switching time between the one or more hops.
  • Some implementations of the method and apparatuses described herein may further include a processor for wireless communication.
  • the processor receives a resource allocation configuration to perform SL-PRS transmission over unlicensed carriers, the resource allocation configuration including at least RB sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs.
  • the processor transmits at least one SL-PRS over an unlicensed carrier based at least in part on the resource allocation configuration.
  • the processor transmits the at least one SL-PRS over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the processor transmits multiple SL-PRSs over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the processor transmits a resource allocation configuration request, and in response, receives the resource allocation configuration.
  • the resource allocation configuration is pre-configured by at least one of a UE or a communication device.
  • the UE is at least one of a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside unit.
  • the processor transmits the at least one SL-PRS over the unlicensed carrier to a communication device, the communication device being at least one of a base station, a location server, a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside-unit.
  • the resource allocation configuration indicates a shared resource pool structure with at least one of RB sets defined for SL-PRS and associated sidelink control information, or the RB sets defined for sidelink data and the associated sidelink control information.
  • the resource allocation configuration indicates a shared resource pool structure with RB sets defined for SL-PRS, sidelink data, and associated sidelink control information.
  • the resource allocation configuration indicates a dedicated resource pool structure with RB sets defined for SL- PRS and associated sidelink control information.
  • the resource allocation configuration comprises at least one of a sidelink BWP, a sidelink positioning resource pool defined in terms of the RB sets, a SL-PRS bandwidth indication, or an indication of contiguous PRB resource allocation or interlaced PRS resource allocation.
  • a sidelink positioning RB set configuration comprises at least one of multiple SL-PRS resource IDs, SL-PRS resource set IDs, SL-PRS transmission-reception point IDs, SL-PRS comb offsets and associated SL-PRS comb sizes, SL-PRS starting symbols and a number of SL-PRS symbols, a number of subchannels, or a channel size.
  • a sidelink positioning RB set configuration comprises multiple interlaced transmissions for SL-PRS RB sets with a number of interlaces that are equally spaced according to a parameter that indicates the number of interlaces or RBs between each of the multiple interlaced RB transmissions.
  • the sidelink positioning RB set configuration is associated with different sidelink positioning transmitters differentiated by IDs comprising at least one of a source-ID, a session-ID, a destination-ID, a unique layer- 1 ID, or a unique layer-2 ID.
  • Signaling for the resource allocation configuration includes at least one of a lower-layer UE-specific signaling, a higher-layer UE-specific signaling, or broadcast signaling.
  • Intra-cell guard bands are configured for sidelink data or the SL-PRS transmission. At least one of a transmit frequency hopping for SL-PRS or a receive frequency hopping for SL-PRS is enabled across the RB sets based at least in part on a received frequency hopping configuration comprising one or more sidelink positioning measurements corresponding to at least one of one or more hops, a time between the one or more hops, a same numerology and bandwidth among the one or more hops, a different numerology and bandwidth among the one or more hops, or a switching time between the one or more hops.
  • Some implementations of the method and apparatuses described herein may further include a method performed by a UE, the method including: receiving a resource allocation configuration to perform SL-PRS transmission over unlicensed carriers, the resource allocation configuration comprising at least RB sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRS s; and transmitting at least one SL-PRS over an unlicensed carrier based at least in part on the resource allocation configuration.
  • the method further comprising transmitting the at least one SL-PRS over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the method further comprising transmitting multiple SL-PRSs over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the method further comprising transmitting a resource allocation configuration request, and in response, receiving the resource allocation configuration.
  • the resource allocation configuration is pre-configured by at least one of the UE or a communication device.
  • the UE is at least one of a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside unit.
  • the method further comprising transmitting the at least one SL-PRS over the unlicensed carrier to a communication device, the communication device being at least one of a base station, a location server, a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside-unit.
  • the resource allocation configuration indicates a shared resource pool structure with at least one of RB sets defined for SL-PRS and associated sidelink control information, or the RB sets defined for sidelink data and the associated sidelink control information.
  • the resource allocation configuration indicates a shared resource pool structure with RB sets defined for SL-PRS, sidelink data, and associated sidelink control information.
  • the resource allocation configuration indicates a dedicated resource pool structure with RB sets defined for SL-PRS and associated sidelink control information.
  • the resource allocation configuration comprises at least one of a sidelink BWP, a sidelink positioning resource pool defined in terms of the RB sets, a SL-PRS bandwidth indication, or an indication of contiguous PRB resource allocation or interlaced PRS resource allocation.
  • a sidelink positioning RB set configuration comprises at least one of multiple SL-PRS resource IDs, SL-PRS resource set IDs, SL-PRS transmission-reception point IDs, SL-PRS comb offsets and associated SL-PRS comb sizes, SL-PRS starting symbols and a number of SL-PRS symbols, a number of subchannels, or a channel size.
  • a sidelink positioning RB set configuration comprises multiple interlaced transmissions for SL-PRS RB sets with a number of interlaces that are equally spaced according to a parameter that indicates the number of interlaces or RBs between each of the multiple interlaced RB transmissions.
  • the sidelink positioning RB set configuration is associated with different sidelink positioning transmitters differentiated by IDs comprising at least one of a source-ID, a session-ID, a destination-ID, a unique layer- 1 ID, or a unique layer-2 ID.
  • Signaling for the resource allocation configuration includes at least one of a lower-layer UE-specific signaling, a higher-layer UE-specific signaling, or broadcast signaling.
  • Intra-cell guard bands are configured for sidelink data or the SL-PRS transmission.
  • At least one of a transmit frequency hopping for SL-PRS or a receive frequency hopping for SL-PRS is enabled across the RB sets based at least in part on a received frequency hopping configuration comprising one or more sidelink positioning measurements corresponding to at least one of one or more hops, a time between the one or more hops, a same numerology and bandwidth among the one or more hops, a different numerology and bandwidth among the one or more hops, or a switching time between the one or more hops.
  • Some implementations of the method and apparatuses described herein may further include a first communication device for wireless communication.
  • the first communication device receives, from a second communication device, a resource allocation configuration to perform SL-PRS transmission over unlicensed carriers, the resource allocation configuration including at least resource block sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs.
  • the first communication device transmits at least one SL-PRS to the second communication device over an unlicensed carrier based at least in part on the resource allocation configuration.
  • the first communication device transmits the at least one SL-PRS over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the first communication device transmits multiple SL-PRSs over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the first communication device transmits a resource allocation configuration request, and in response, receives the resource allocation configuration.
  • the resource allocation configuration is pre-configured by at least one of the first communication device or the second communication device.
  • the first communication device is at least one of a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside unit.
  • the second communication device is at least one of a base station, a location server, a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside-unit.
  • the resource allocation configuration indicates a shared resource pool structure with at least one of RB sets defined for SL-PRS and associated sidelink control information, or the RB sets defined for sidelink data and the associated sidelink control information.
  • the resource allocation configuration indicates a shared resource pool structure with RB sets defined for SL-PRS, sidelink data, and associated sidelink control information.
  • the resource allocation configuration indicates a dedicated resource pool structure with RB sets defined for SL-PRS and associated sidelink control information.
  • the resource allocation configuration comprises at least one of a sidelink BWP, a sidelink positioning resource pool defined in terms of the RB sets, a SL-PRS bandwidth indication, or an indication of contiguous PRB resource allocation or interlaced PRS resource allocation.
  • a sidelink positioning RB set configuration comprises at least one of multiple SL-PRS resource IDs, SL-PRS resource set IDs, SL-PRS transmission-reception point IDs, SL-PRS comb offsets and associated SL-PRS comb sizes, SL-PRS starting symbols and a number of SL-PRS symbols, a number of subchannels, or a channel size.
  • a sidelink positioning RB set configuration comprises multiple interlaced transmissions for SL-PRS RB sets with a number of interlaces that are equally spaced according to a parameter that indicates the number of interlaces or RBs between each of the multiple interlaced RB transmissions.
  • the sidelink positioning RB set configuration is associated with different sidelink positioning transmitters differentiated by IDs comprising at least one of a source-ID, a session-ID, a destination-ID, a unique layer- 1 ID, or a unique layer-2 ID.
  • Signaling for the resource allocation configuration includes at least one of a lower-layer UE-specific signaling, a higher-layer UE-specific signaling, or broadcast signaling.
  • Intra-cell guard bands are configured for sidelink data or the SL-PRS transmission.
  • At least one of a transmit frequency hopping for SL-PRS or a receive frequency hopping for SL-PRS is enabled across the RB sets based at least in part on a received frequency hopping configuration comprising one or more sidelink positioning measurements corresponding to at least one of one or more hops, a time between the one or more hops, a same numerology and bandwidth among the one or more hops, a different numerology and bandwidth among the one or more hops, or a switching time between the one or more hops.
  • Some implementations of the method and apparatuses described herein may further include a method performed by a first communication device, the method including: receiving, from a second communication device, a resource allocation configuration to perform SL-PRS transmission over unlicensed carriers, the resource allocation configuration comprising at least resource block sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs; and transmitting at least one SL-PRS to the second communication device over unlicensed carriers based at least in part on the resource allocation configuration.
  • the method further comprising transmitting the at least one SL-PRS over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the method further comprising transmitting multiple SL-PRSs over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the method further comprising transmitting a resource allocation configuration request, and in response, receiving the resource allocation configuration.
  • the resource allocation configuration is pre-configured by at least one of the first communication device or the second communication device.
  • the first communication device is at least one of a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside unit.
  • the second communication device is at least one of a base station, a location server, a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside-unit.
  • the resource allocation configuration indicates a shared resource pool structure with at least one of RB sets defined for SL-PRS and associated sidelink control information, or the RB sets defined for sidelink data and the associated sidelink control information.
  • the resource allocation configuration indicates a shared resource pool structure with RB sets defined for SL-PRS, sidelink data, and associated sidelink control information.
  • the resource allocation configuration indicates a dedicated resource pool structure with RB sets defined for SL-PRS and associated sidelink control information.
  • the resource allocation configuration comprises at least one of a sidelink BWP, a sidelink positioning resource pool defined in terms of the RB sets, a SL-PRS bandwidth indication, or an indication of contiguous PRB resource allocation or interlaced PRS resource allocation.
  • a sidelink positioning RB set configuration comprises at least one of multiple SL-PRS resource IDs, SL-PRS resource set IDs, SL-PRS transmission-reception point IDs, SL-PRS comb offsets and associated SL-PRS comb sizes, SL-PRS starting symbols and a number of SL-PRS symbols, a number of subchannels, or a channel size.
  • a sidelink positioning RB set configuration comprises multiple interlaced transmissions for SL-PRS RB sets with a number of interlaces that are equally spaced according to a parameter that indicates the number of interlaces or RBs between each of the multiple interlaced RB transmissions.
  • the sidelink positioning RB set configuration is associated with different sidelink positioning transmitters differentiated by IDs comprising at least one of a source-ID, a session-ID, a destination-ID, a unique layer- 1 ID, or a unique layer-2 ID.
  • Signaling for the resource allocation configuration includes at least one of a lower-layer UE-specific signaling, a higher-layer UE-specific signaling, or broadcast signaling.
  • Intra-cell guard bands are configured for sidelink data or the SL-PRS transmission.
  • At least one of a transmit frequency hopping for SL-PRS or a receive frequency hopping for SL-PRS is enabled across the RB sets based at least in part on a received frequency hopping configuration comprising one or more sidelink positioning measurements corresponding to at least one of one or more hops, a time between the one or more hops, a same numerology and bandwidth among the one or more hops, a different numerology and bandwidth among the one or more hops, or a switching time between the one or more hops.
  • Figure 1 illustrates an example of a wireless communications system in accordance with aspects of the present disclosure.
  • Figure 2 illustrates an example of a system for NR beam-based positioning, in accordance with aspects of the present disclosure.
  • Figure 3 illustrates an example of absolute and relative positioning scenarios, in accordance with aspects of the present disclosure.
  • FIG. 4 illustrates an example of a multi-cell round trip time (RTT) procedure, in accordance with aspects of the present disclosure.
  • Figure 5 illustrates an example of a system for relative range estimation using a gNB RTT positioning framework, in accordance with aspects of the present disclosure.
  • Figure 6 illustrates an example of various NR-U deployment scenarios, in accordance with aspects of the present disclosure.
  • Figure 7 illustrates an example of a first SL-U SL-PRS physical resource allocation structure (PRAS), in accordance with aspects of the present disclosure.
  • PRAS physical resource allocation structure
  • Figure 8 illustrates an example of a second SL-U SL-PRS PRAS, in accordance with aspects of the present disclosure.
  • Figure 9 illustrates an example of a third SL-U SL-PRS PRAS, in accordance with aspects of the present disclosure.
  • Figure 10 illustrates an example of an SL-U interlaced SL-PRS configuration for multiplexing different SL-PRS transmissions, in accordance with aspects of the present disclosure.
  • Figure 11 illustrates an example of transmit (Tx) and/or receive (Rx) frequency hopping of SL-PRS using the interlace structure, in accordance with aspects of the present disclosure.
  • Figure 12 illustrates an example of a UE in accordance with aspects of the present disclosure.
  • Figure 13 illustrates an example of a processor in accordance with aspects of the present disclosure.
  • Figure 14 illustrates an example of a communication device in accordance with aspects of the present disclosure.
  • Figure 15 illustrates a flowchart of a method performed by a UE in accordance with aspects of the present disclosure.
  • Figure 16 illustrates a flowchart of a method performed by a communication device in accordance with aspects of the present disclosure.
  • a wireless communications system enables a sidelink positioning framework for UE-assisted and UE-based positioning methods.
  • the sidelink positioning framework supports varying target positioning requirements across different use cases, such as for vehicle-to-everything (V2X), public safety, industrial Internet of things (IIoT), commercial use cases, and other applications.
  • the sidelink positioning is implemented to determine the absolute or relative position of a UE by utilizing sidelink positioning methods, such as sidelink RTT-type methods, including single-sided and double-sided RTT, SL- angle of arrival (AO A), and SL-time difference of arrival (TDOA).
  • sidelink RTT-type methods including single-sided and double-sided RTT, SL- angle of arrival (AO A), and SL-time difference of arrival (TDOA).
  • Conventional techniques for sidelink positioning specify and support SL-PRS transmissions in licensed and ITS spectrum bands.
  • a variety of sidelink positioning techniques can be utilized to obtain accurate sidelink positioning performance (e.g., suitable accuracy and/or low latency positioning) depending on the scenarios (e.g., bandwidth and channel environment and thus enable the computation of absolute, relative, distance, direction, and position estimates amongst UEs).
  • the current sidelink positioning techniques can have limited bandwidth availability, resulting in a slow response and/or inaccurate indications of device location.
  • PSD power spectral density
  • the operation of sidelink data communications over unlicensed spectrum can be supported with the introduction of RB-sets as part of the SL-U transmission and reception, and resource allocation procedures.
  • the utilization of unlicensed spectrum for mobile technologies can be used to enhance cellular services and alleviate the burden of excessive data traffic on mobile networks.
  • Features such as licensed assisted access (FAA) and New Radio unlicensed (NR-U) are 3GPP features that enable the use of unlicensed spectrum.
  • FAA licensed assisted access
  • NR-U New Radio unlicensed
  • the sidelink positioning operations over the unlicensed bands are designed to leverage the additional bandwidths and transmission for enhanced accuracy and additional degrees of freedom.
  • a key aspect in enabling sidelink positioning over unlicensed bands is the design of the physical resource allocation structures, which are designed to meet regulatory standards consisting of occupied channel bandwidth and PSD requirements, and this disclosure describes aspects to address various SF-U sidelink positioning resource allocation techniques.
  • the use of unlicensed spectrum can offer positioning performance benefits in terms of positioning accuracy, especially in the case of timing-based positioning techniques (e.g., SF-TDOA).
  • Aspects of the disclosure provide for enhancing the SF-PRS transmission via enhanced resource allocation schemes for SF-U operation.
  • Aspects of the disclosure are directed to the allocation of time-frequency resources of SF-PRS in terms of RB-sets and subchannels within a slot.
  • Different configurations of physical resource allocation structures are described, which involve the use of the positioning dedicated resource pool for SF-PRS only transmission, and a common or shared resource pool for SF-PRS and SF data transmissions.
  • Another aspect of the disclosure is directed to interlacing of different sidelink positioning transmitters, to meet the minimum occupied channel bandwidth requirements within an RB-set.
  • Another aspect of the disclosure involves the Tx and/or Rx frequency hopping of SL-PRS across different RB-sets based on the interlace resource allocation structure.
  • the described techniques take into account and/or address implementation features, such as to ensure that the minimum scheduling for SL-U supports SL-PRS transmission for a given configuration without degrading positioning accuracy while maintaining power spectral density regulatory requirements and minimum channel occupancy requirements.
  • the implementation features also support different RB-set (resource block sets) schemes that are compatible with the dedicated resource pool and shared resource pools.
  • Additional implementation features include SL-PRS (pre-)configurations for interlace RB -based transmission for dedicated resource pools from the transmitter perspective, as well as to support various (M, N) comb patterns for a minimum listen-before-talk (LBT) bandwidth of 20 MHz, with consideration of full staggering and partial staggering designs, where M is the number of symbols in the time domain and N is the comb size in the frequency domain.
  • the interlace RB-based configuration content includes time indications, frequency domain, and ID indications.
  • Additional implementation features include support for Tx and/or Rx frequency hopping of SL-PRS across multiple RB-sets for enhanced positioning accuracy.
  • aspects of the disclosure are directed to solutions and implementations for SL-U positioning, while maintaining the minimum channel occupancy and PSD requirements.
  • this disclosure details solutions that include support for multiple SL-U SL-PRS physical resource allocation structures, including a first configuration of a common or shared resource pool structure enabling RB-sets defined for SL-PRS transmissions, and for sidelink data (physical sidelink shared channel (PSSCH)) transmissions.
  • PSSCH physical sidelink shared channel
  • the physical resource allocation structures include a second configuration of a common or shared resource pool structure enabling RB-sets, which include SL-PRS transmissions and SL data (PSSCH) transmissions, and include a third configuration of a dedicated resource pool structure enabling RB-sets, which include only SL-PRS transmissions.
  • This disclosure also details solutions that include support to define configurations for interlaced SL-PRS transmission from multiple transmitting UEs, support for SL-PRS Tx and/or Rx frequency hopping across RB-sets based on the interlaces in each RB-set, and support to enable collection of sidelink assistance data error for computing a sidelink positioning integrity result. [0038] Aspects of the present disclosure are described in the context of a wireless communications system.
  • FIG. 1 illustrates an example of a wireless communications system 100 in accordance with aspects of the present disclosure.
  • the wireless communications system 100 may include one or more network equipment NE 102, one or more UE 104, and a core network (CN) 106.
  • the wireless communications system 100 may support various radio access technologies.
  • the wireless communications system 100 may be a 4G network, such as an LTE network or an LTE- Advanced (LTE-A) network.
  • LTE-A LTE- Advanced
  • the wireless communications system 100 may be a NR network, such as a 5G network, a 5G- Advanced (5G-A) network, or a 5G ultrawideband (5G-UWB) network.
  • 5G-A 5G- Advanced
  • 5G-UWB 5G ultrawideband
  • the wireless communications system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technology including Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20.
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Wi-Fi
  • WiMAX IEEE 802.16
  • IEEE 802.20 The wireless communications system 100 may support radio access technologies beyond 5G, for example, 6G. Additionally, the wireless communications system 100 may support technologies, such as time division multiple access (TDMA), frequency division multiple access (FDMA), or code division multiple access (CDMA), etc.
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • CDMA code division multiple access
  • the one or more NE 102 may be dispersed throughout a geographic region to form the wireless communications system 100.
  • One or more of the NE 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a network function, a network entity, a radio access network (RAN), a NodeB, an eNodeB (eNB), a nextgeneration NodeB (gNB), or other suitable terminology.
  • An NE 102 and a UE 104 may communicate via a communication link, which may be a wireless or wired connection.
  • an NE 102 and a UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) over a Uu interface.
  • An NE 102 may provide a geographic coverage area for which the NE 102 may support services for one or more UEs 104 within the geographic coverage area.
  • an NE 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc.) according to one or multiple radio access technologies.
  • an NE 102 may be moveable, for example, a satellite associated with a non-terrestrial network (NTN).
  • NTN non-terrestrial network
  • different geographic coverage areas associated with the same or different radio access technologies may overlap, but the different geographic coverage areas may be associated with different NE 102.
  • the one or more UEs 104 may be dispersed throughout a geographic region of the wireless communications system 100.
  • a UE 104 may include or may be referred to as a remote unit, a mobile device, a wireless device, a remote device, a subscriber device, a transmitter device, a receiver device, or some other suitable terminology.
  • the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples.
  • the UE 104 may be referred to as an Internet-of-Things (loT) device, an Internet-of- Everything (loE) device, or machine-type communication (MTC) device, among other examples.
  • LoT Internet-of-Things
  • LoE Internet-of- Everything
  • MTC machine-type communication
  • a UE 104 may be able to support wireless communication directly with other UEs 104 over a communication link.
  • a UE 104 may support wireless communication directly with another UE 104 over a device-to-device (D2D) communication link.
  • D2D device-to-device
  • the communication link may be referred to as a sidelink.
  • a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.
  • An NE 102 may support communications with the CN 106, or with another NE 102, or both.
  • an NE 102 may interface with other NE 102 or the CN 106 through one or more backhaul links (e.g., SI, N2, N6, or other network interface).
  • the NE 102 may communicate with each other directly.
  • the NE 102 may communicate with each other indirectly (e.g., via the CN 106).
  • one or more NE 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC).
  • An ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as a radio heads, smart radio heads, or transmission-reception points (TRPs).
  • TRPs transmission-reception points
  • the CN 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions.
  • the CN 106 may be an evolved packet core (EPC), or a 5G core (5GC), which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management functions (AMF)) and a user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)).
  • EPC evolved packet core
  • 5GC 5G core
  • MME mobility management entity
  • AMF access and mobility management functions
  • S-GW serving gateway
  • PDN gateway packet data network gateway
  • UPF user plane function
  • the CN 106 may include a location management function (LMF), which manages the support of different location services for target UEs, including positioning of UEs and delivery of assistance data to UEs, interacting with multiple NG-RAN nodes to provide assistance data information for broadcasting, and may interact with the AMF to provide (updated) UE positioning capability to the AMF and to receive stored UE positioning capability from the AMF.
  • LMF location management function
  • the LMF can include a control plane entity or user plane entity.
  • control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearers, signal bearers, etc.) for the one or more UEs 104 served by the one or more NE 102 associated with the CN 106.
  • NAS non-access stratum
  • the CN 106 may communicate with a packet data network over one or more backhaul links (e.g., via an SI, N2, N6, or other network interface).
  • the packet data network may include an application server.
  • one or more UEs 104 may communicate with the application server.
  • a UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the CN 106 via an NE 102.
  • the CN 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application server using the established session (e.g., the established PDU session).
  • the PDU session may be an example of a logical connection between the UE 104 and the CN 106 (e.g., one or more network functions of the CN 106).
  • the NEs 102 and the UEs 104 may use resources of the wireless communications system 100 (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers)) to perform various operations (e.g., wireless communications).
  • the NEs 102 and the UEs 104 may support different resource structures.
  • the NEs 102 and the UEs 104 may support different frame structures.
  • the NEs 102 and the UEs 104 may support a single frame structure.
  • the NEs 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures).
  • the NEs 102 and the UEs 104 may support various frame structures based on one or more numerologies.
  • One or more numerologies may be supported in the wireless communications system 100, and a numerology may include a subcarrier spacing and a cyclic prefix.
  • a time interval of a resource may be organized according to frames (also referred to as radio frames).
  • Each frame may have a duration, for example, a 10 millisecond (ms) duration.
  • each frame may include multiple subframes.
  • each frame may include 10 subframes, and each subframe may have a duration, for example, a 1 ms duration.
  • each frame may have the same duration.
  • each subframe of a frame may have the same duration.
  • a time interval of a resource may be organized according to slots.
  • a subframe may include a number (e.g., quantity) of slots.
  • the number of slots in each subframe may also depend on the one or more numerologies supported in the wireless communications system 100.
  • Each slot may include a number (e.g., quantity) of symbols (e.g., OFDM symbols).
  • the number (e.g., quantity) of slots for a subframe may depend on a numerology.
  • a slot For a normal cyclic prefix, a slot may include 14 symbols.
  • a slot For an extended cyclic prefix (e.g., applicable for 60 kHz subcarrier spacing), a slot may include 12 symbols.
  • a first subcarrier spacing e.g. 15 kHz
  • an electromagnetic (EM) spectrum may be split, based on frequency or wavelength, into various classes, frequency bands, frequency channels, etc.
  • the wireless communications system 100 may support one or multiple operating frequency bands, such as frequency range designations FR1 (410 MHz - 7.125 GHz), FR2 (24.25 GHz - 52.6 GHz), FR3 (7.125 GHz - 24.25 GHz), FR4 (52.6 GHz - 114.25 GHz), FR4a or FR4-1 (52.6 GHz - 71 GHz), and FR5 (114.25 GHz - 300 GHz).
  • FR1 410 MHz - 7.125 GHz
  • FR2 24.25 GHz - 52.6 GHz
  • FR3 7.125 GHz - 24.25 GHz
  • FR4 (52.6 GHz - 114.25 GHz
  • FR4a or FR4-1 52.6 GHz - 71 GHz
  • FR5 114.25 GHz - 300 GHz
  • the NEs 102 and the UEs 104 may perform wireless communications over one or more of the operating frequency bands.
  • FR1 may be used by the NEs 102 and the UEs 104, among other equipment or devices for cellular communications traffic (e.g., control information, data).
  • FR2 may be used by the NEs 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.
  • FR1 may be associated with one or multiple numerologies (e.g., at least three numerologies).
  • FR2 may be associated with one or multiple numerologies (e.g., at least 2 numerologies).
  • a NE 102 is representative of any type of communication device, including but not limited to a base station, a location server, a target UE, an anchor UE with or without a known location, a server UE, a client UE, a roadside -unit, or any type of network equipment.
  • a UE 104 is representative of any type of communication device, including but not limited to a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside unit.
  • a UE 104 receives a resource allocation configuration to perform SL-PRS transmission over unlicensed carriers, where the resource allocation configuration includes at least RB sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs.
  • the UE 104 transmits at least one SL-PRS over an unlicensed carrier based at least in part on the resource allocation configuration.
  • the UE 104 transmits the at least one SL-PRS over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the UE transmits multiple SL-PRSs over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • a first communication device receives, from a second communication device, a resource allocation configuration to perform SL-PRS transmission over unlicensed carriers, where the resource allocation configuration includes at least RB sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs.
  • the first communication device transmits at least one SL-PRS to the second communication device over an unlicensed carrier based at least in part on the resource allocation configuration.
  • the first communication device transmits the at least one SL-PRS over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the first communication device transmits multiple SL-PRSs over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • NR positioning based on NR Uu signals and stand-alone (SA) architecture e.g., beam-based transmissions
  • the targeted use cases also included commercial and regulatory (emergency services) scenarios as in Release 15.
  • the performance requirements are the following:
  • FIG. 2 illustrates an example of system 200 for NR beam-based positioning in accordance with aspects of the present disclosure.
  • the system 200 illustrates a UE 104 and NEs 102 (e.g., gNBs).
  • the PRS can be transmitted by different base stations (serving and neighboring) using narrow beams over FR1 and FR2 as illustrated in the example system 200, which is relatively different when compared to LTE where the PRS was transmitted across the whole cell.
  • the PRS can be locally associated with a PRS resource ID and resource set ID for a base station (e.g., a TRP).
  • a base station e.g., a TRP
  • UE positioning measurements such as reference signal time difference (RSTD) and PRS reference signal received power (RSRP) measurements are made between beams (e.g., between a different pair of downlink (DL) PRS resources or DL PRS resource sets) as opposed to different cells as was the case in LTE.
  • RSTD reference signal time difference
  • RSRP PRS reference signal received power
  • the tables below show the reference signal (RS) to measurements mapping for each of the supported RAT-dependent positioning techniques at the UE and gNB, respectively.
  • the RAT- dependent positioning techniques may utilize the 3GPP RAT and core network entities to perform the position estimation of the UE, which are differentiated from RAT-independent positioning techniques, which rely on the global navigation satellite system (GNSS), inertial measurement unit (IMU) sensor, wireless local area network (WLAN), and Bluetooth technologies for performing target device (UE) positioning.
  • GNSS global navigation satellite system
  • IMU inertial measurement unit
  • WLAN wireless local area network
  • Bluetooth Bluetooth
  • Table UE measurements to enable RAT-dependent positioning techniques.
  • Table gNB measurements to enable RAT-dependent positioning techniques.
  • FIG. 3 illustrates an example 300 of absolute and relative positioning scenarios in accordance with aspects of the present disclosure.
  • the network devices described with reference to example 300 may use and/or be implemented with the wireless communications system 100 and include UEs 104 and NEs 102 (e.g., eNB, gNB).
  • the example 300 is an overview of absolute and relative positioning scenarios as defined in the architectural (stage 1 ) specifications using three different co-ordinate systems, including (III) a conventional absolute positioning, fixed coordinate system at 302; (II) a relative positioning, variable and moving coordinate system at 304; and (I) a relative positioning, variable coordinate system at 306.
  • the relative positioning, variable coordinate system at 306 is based on relative device positions in a variable coordinate system, where the reference may be always changing with the multiple nodes that are moving in different directions.
  • the example 300 also includes a scenario 308 for an out of coverage area in which UEs need to determine relative position with respect to each other.
  • the relative positioning, variable and moving coordinate system at 304 may support relative lateral position accuracy of 0.1 meters between UEs supporting V2X applications, and may support relative longitudinal position accuracy of less than 0.5 meters for UEs supporting V2X applications for platooning in proximity.
  • the relative positioning, variable coordinate system at 306 may support relative positioning between one UE and positioning nodes within 10 meters of each other.
  • the relative positioning, variable coordinate system at 306 may also support vertical location of a UE in terms of relative height/depth to local ground level.
  • DL-TDOA downlink time difference of arrival
  • AOD DL-angle of departure
  • E-CID enhanced cell-ID
  • NR E-CID uplink
  • UL-TDOA uplink
  • DL-TDOA downlink time difference of arrival
  • the downlink time difference of arrival (DL-TDOA) positioning method makes use of the DL RSTD (and optionally DL PRS RSRP) of downlink signals received from multiple TPs, at the UE.
  • the UE measures the DL RSTD (and optionally DL PRS RSRP) of the received signals using assistance data received from the positioning server, and the resulting measurements are used along with other configuration information to locate the UE in relation to the neighboring TPs.
  • the DL AOD positioning method makes use of the measured DL PRS RSRP of downlink signals received from multiple TPs, at the UE.
  • the UE measures the DL PRS RSRP of the received signals using assistance data received from the positioning server, and the resulting measurements are used along with other configuration information to locate the UE in relation to the neighboring TPs.
  • FIG. 4 illustrates an example 400 of a multi-cell RTT procedure in accordance with aspects of the present disclosure.
  • the multi-RTT positioning technique makes use of the UE Rx-Tx measurements and DL PRS RSRP of downlink signals received from multiple TRPs, as measured by the UE and the measured gNB Rx-Tx measurements and uplink sounding reference signal (SRS) RSRP (UL SRS-RSRP) at multiple TRPs of uplink signals transmitted from UE.
  • SRS uplink sounding reference signal
  • the UE measures the UE Rx-Tx measurements (and optionally DL PRS RSRP of the received signals) using assistance data received from the positioning server (also referred to herein as the location server), and the TRPs the gNB Rx-Tx measurements (and optionally UL SRS-RSRP of the received signals) using assistance data received from the positioning server.
  • the measurements are used to determine the RTT at the positioning server, which are used to estimate the location of the UE.
  • the multi-RTT is only supported for UE-assisted and NG-RAN assisted positioning techniques as noted in the table above.
  • FIG. 5 illustrates an example of a system 500 for relative range estimation using a gNB RTT positioning framework in accordance with aspects of the present disclosure.
  • the system 500 illustrates the relative range estimation using the existing single gNB RTT positioning framework.
  • the location server e.g., LMF
  • the location server can configure measurements to the different UEs, and then the target-UEs can report their measurements in a transparent way to the location server.
  • the location server can compute the relative distance between two UEs. This approach is high in latency and is not an efficient method in terms of procedures and signaling overhead.
  • the position of a UE is estimated with the knowledge of its serving ng-eNB, gNB, and cell, and is based on LTE signals.
  • the information about the serving ng-eNB, gNB, and cell may be obtained by paging, registration, or other methods.
  • the NR E-CID positioning refers to techniques which use additional UE measurements and/or NR radio resources and other measurements to improve the UE location estimate using NR signals.
  • E-CID positioning may utilize some of the same measurements as the measurement control system in the RRC protocol, the UE may not make additional measurements for the sole purpose of positioning (e.g., the positioning procedures do not supply a measurement configuration or measurement control message, and the UE reports the measurements that it has available rather than being required to take additional measurement actions).
  • Barometric pressure sensor positioning techniques make use of barometric sensors to determine the vertical component of the position of the UE.
  • the UE measures barometric pressure, optionally aided by assistance data, to calculate the vertical component of its location or to send measurements to the positioning server for position calculation. This technique should be combined with other positioning methods to determine the 3D position of the UE.
  • WLAN positioning techniques makes use of the WLAN measurements (access point (AP) identifiers and optionally other measurements) and databases to determine the location of the UE.
  • the UE measures received signals from WLAN access points, optionally aided by assistance data, to send measurements to the positioning server for position calculation.
  • the location of the UE is calculated.
  • the UE makes use of WLAN measurements and optionally WLAN AP assistance data provided by the positioning server to determine its location.
  • Bluetooth positioning techniques makes use of Bluetooth measurements (beacon identifiers and optionally other measurements) to determine the location of the UE.
  • the UE measures received signals from Bluetooth beacons.
  • the location of the UE is calculated.
  • the Bluetooth methods may be combined with other positioning methods (e.g., WLAN) to improve positioning accuracy of the UE.
  • TBS positioning techniques make use of a TBS, which includes a network of ground- based transmitters, broadcasting signals only for positioning purposes.
  • TBS positioning signals are MBS (Metropolitan Beacon System) signals and PRSs.
  • the UE measures received TBS signals, optionally aided by assistance data, to calculate its location or to send measurements to the positioning server for position calculation.
  • Motion sensor positioning techniques makes use of different sensors such as accelerometers, gyros, magnetometers, and so forth to calculate the displacement of UE.
  • the UE estimates a relative displacement based upon a reference position and/or reference time.
  • the UE sends a report comprising the determined relative displacement which can be used to determine the absolute position. This method can be used with other positioning methods for hybrid positioning.
  • Different downlink measurements used for RAT-dependent positioning techniques include DL PRS-RSRP, DL RSTD, and UE Rx-Tx Time Difference.
  • the following measurement configurations may be used: four (4) Pair of DL RSTD measurements can be performed per pair of cells, and each measurement is performed between a different pair of DL PRS Resources/Resource Sets with a single reference timing; and eight (8) DL PRS RSRP measurements can be performed on different DL PRS resources from the same cell.
  • the DL PRS reference signal received power (DL PRS-RSRP) is defined as the linear average over the power contributions (in [W]) of the resource elements that carry DL PRS reference signals configured for RSRP measurements within the considered measurement frequency bandwidth.
  • Lor frequency range 1 the reference point for the DL PRS-RSRP is the antenna connector of the UE.
  • Lor frequency range 2 DL PRS-RSRP is measured based on the combined signal from antenna elements corresponding to a given receiver branch. Lor frequency range 1 and 2, if receiver diversity is in use by the UE, the reported DL PRS-RSRP value is not lower than the corresponding DL PRS-RSRP of any of the individual receiver branches.
  • DL PRS-RSRP is applicable for RRC_CONNECTED intra-frequency and RRC_CONNECTED inter-frequency.
  • the DL RSTD is the downlink relative timing difference between the positioning node j and the reference positioning node i, defined as TsubframeRxj - TsubframeRxi, where TsubframeRxj is the time when the UE receives the start of one subframe from positioning node j, and TsubframeRxi is the time when the UE receives the corresponding start of one subframe from positioning node i that is closest in time to the subframe received from positioning node j.
  • Multiple DL PRS resources can be used to determine the start of one subframe from a positioning node.
  • Lor frequency range 1 the reference point for the DL RSTD is the antenna connector of the UE.
  • the reference point for the DL RSTD is the antenna of the UE.
  • the DL RSTD is applicable for RRC_CONNECTED intra-frequency and RRC_CONNECTED inter-frequency.
  • the UE receive-transmit (Rx-Tx) time difference is defined as TUE RX - TUE TX, where TUE RX is the UE received timing of downlink subframe #i from a positioning node, defined by the first detected path in time, and TUE TX is the UE transmit timing of uplink subframe #j that is closest in time to the subframe #i received from the positioning node.
  • Multiple DL PRS resources can be used to determine the start of one subframe of the first arrival path of the positioning node.
  • the reference point for TUE RX measurement shall be the Rx antenna connector of the UE and the reference point for TUE TX measurement shall be the Tx antenna connector of the UE.
  • the reference point for TUE RX measurement shall be the Rx antenna of the UE and the reference point for TUE TX measurement shall be the Tx antenna of the UE.
  • the UE Rx - Tx time difference is applicable for RRC_CONNECTED intra-frequency and RRC_CONNECTED inter-frequency.
  • the DL PRS reference signal received path power (DL PRS-RSRPP) is defined as the power of the linear average of the channel response at the i-th path delay of the resource elements that carry DL PRS signal configured for the measurement, where DL PRS-RSRPP for the 1st path delay is the power contribution corresponding to the first detected path in time.
  • the reference point for the DL PRS-RSRPP is the antenna connector of the UE.
  • DL PRS-RSRPP is measured based on the combined signal from antenna elements corresponding to a given receiver branch.
  • DL PRS-RSRPP is applicable for RRC_CONNECTED and RRCJNACTIVE.
  • Table Downlink measurements for downlink-based positioning techniques.
  • NR operation in the unlicensed bands is introduced in a similar fashion to LTE LAA. Operation in the unlicensed portions of the spectrum should adhere to the regional regulatory requirements, which introduces additional challenges when compared to operation in the licensed spectrum.
  • the regulatory requirements may include ETSI EN 301 893 V2.1.1.
  • listen-before-talk (LBT) clear channel assessment is the mechanism by which an equipment (e.g. a UE) applies CCA before using the channel.
  • the maximum channel occupancy time (MCOT) defines the MCOT which should not be greater than 95% fixed frame period (defined by a manufacturer within range between 1ms and 10ms) and shall be followed by an idle period until the start of the next fixed frame period such that the idle period is at least 5% of the channel occupancy time, with a minimum of 100 ps.
  • the energy detection (ED) threshold level (TL) at the input of the receiver shall be proportional to the maximum transmit power (PH) according to the formula which assumes a 0 dBi receive antenna and PH to be specified in dBm e.i.r.p.
  • the power density is the mean equivalent isotropically radiated power (e.i.r.p.) density during a transmission burst.
  • the occupied channel bandwidth shall be between 80% and 100% of the nominal channel bandwidth. In case of smart antenna systems (devices with multiple transmit chains) each of the transmit chains shall meet this requirement.
  • the OCB may change over time and/or based on payload.
  • a remote LAN shall employ a dynamic frequency selection (DFS) function to detect interference from radar systems (radar detection) and to avoid co-channel operation with these systems.
  • the DFS function also provides, on aggregate, a near-uniform loading of the spectrum (uniform spreading).
  • the frequency (FR) reuse is reduced when multiple devices access the same carrier at the same time period. For unlicensed band operations, other devices should be muted when a single device accesses the carrier.
  • FIG. 6 illustrates an example 600 of various NR-U deployment scenarios in accordance with aspects of the present disclosure.
  • a scenario 602 illustrates carrier aggregation between a licensed band NR (PCell) and a NR-U (SCell).
  • the NR-U SCell may have both downlink and uplink, or downlink only.
  • the NR PCell is connected to 5G- CN.
  • a scenario 604 illustrates dual connectivity between a licensed band LTE (PCell) and a NR-U (PSCell).
  • PCell licensed band LTE
  • PSCell NR-U
  • the LTE PCell connected to the evolved packet core (EPC) has a higher priority than the PCell connected to 5G-CN.
  • a scenario 606 illustrates a stand-alone NR-U, and the NR-U is connected to 5G-CN.
  • a scenario 608 illustrates a stand-alone NR cell in an unlicensed band and uplink in a licensed band. In this example scenario 608, the NR-U is connected to 5G-CN.
  • a scenario 610 illustrates dual connectivity between a licensed band NR and NR-U. In this example scenario 610, the PCell is connected to 5G-CN. All these scenarios are deemed to be of interest for different applications and/or use cases, and are considered to be feasible.
  • the work on scenario 610 has also leveraged the work conducted on the WI on “Multi-RAT Dual-Connectivity and Carrier Aggregation enhancements” (LTE_NR_DC_CA_enh-Core). Note that carrier aggregation across NR-U cells was also in the scope of all the above scenarios.
  • the channel access schemes for NR-based access for unlicensed spectrum can be classified into several categories.
  • Category 1 is immediate transmission after a short switching gap. This is used for a transmitter to immediately transmit after a switching gap inside a COT. The switching gap from reception to transmission is to accommodate the transceiver turnaround time and is no longer than 16 ps.
  • Category 2 is LBT without random back-off. The duration of time that the channel is sensed to be idle before the transmitting entity transmits is deterministic.
  • Category 3 is LBT with random back-off with a contention window of a fixed size. The LBT procedure has the following procedure as one of its components. The transmitting entity draws a random number N within a contention window. The size of the contention window is specified by the minimum and maximum value of N.
  • the size of the contention window is fixed.
  • the random number N is used in the LBT procedure to determine the duration of time that the channel is sensed to be idle before the transmitting entity transmits on the channel.
  • Category 4 is LBT with random back-off with a contention window of variable size.
  • the LBT procedure has the following as one of its components.
  • the transmitting entity draws a random number N within a contention window.
  • the size of contention window is specified by the minimum and maximum value of N.
  • the transmitting entity can vary the size of the contention window when drawing the random number N.
  • the random number N is used in the LBT procedure to determine the duration of time that the channel is sensed to be idle before the transmitting entity transmits on the channel. For different transmissions in a COT and different channels or signals to be transmitted, different categories of channel access schemes can be used.
  • An initiator device can initiate a sidelink positioning/ranging session, and may be implemented as a network entity (e.g., gNB, LMF, etc.) a UE, a roadside unit (RSU), etc.
  • a responder device can respond to a SL positioning/ranging session from an initiator device, and may be implemented as a network entity (e.g., gNB, LMF), a UE, an RSU, etc.
  • a target-UE can represent a UE of interest a position of which (e.g., absolute and/or relative) is to be obtained by an entity such as a network, another UE, and/or by the target-UE itself.
  • Sidelink positioning refers to positioning a UE using reference signals transmitted over sidelink (e.g., PC5 interface) to obtain absolute position, relative position, ranging information, etc.
  • Ranging refers to a determination of a distance and/or direction between a UE and another entity, e.g., anchor UE.
  • An anchor UE refers to a UE supporting positioning of a target-UE (e.g., by transmitting and/or receiving reference signals for positioning, providing positioning-related information, etc., over the sidelink interface).
  • An anchor UE may additionally or alternatively be referred to as sidelink reference UE, a reference UE, etc.
  • An assistant UE refers to a UE supporting ranging and/or sidelink between a sidelink reference UE and target-UE over PC5, such as in scenarios where direct ranging and/or sidelink positioning between the sidelink reference UE or anchor UE and the target-UE may not be supported. Measurement results of ranging/sidelink positioning between the assistance UE and the sidelink reference UE, and that between the assistance UE and the target-UE can be determined and used to derive the ranging/sidelink positioning results between target-UE and sidelink reference UE.
  • a sidelink positioning server UE refers to a UE enabling location calculation for sidelink positioning and ranging-based service.
  • the sidelink positioning server UE can interact with other UE over PC5 to calculate the location of a target-UE.
  • a target-UE and/or sidelink reference UE can act as sidelink positioning server UE.
  • a sidelink positioning client UE refers to a third-party UE (e.g., other than sidelink reference UE and/or the target-UE) which can initiate a ranging/sidelink positioning service request on behalf of an application residing on the sidelink positioning client UE.
  • a sidelink positioning client UE does not have to support ranging/sidelink positioning capability but a communication between the sidelink positioning client UE and a sidelink reference UE or target-UE may be established (e.g., via PC5, 5GC, etc.) for transmission of a service request and a positioning result.
  • a sidelink positioning node may refer to a network entity and/or device/UE participating in a sidelink positioning session, e.g., LMF (location server), gNB, UE, RSU, anchor UE, initiator UE, responder UE, etc.
  • a configuration entity refers to a network node and/or other device/UE capable of configuring time-frequency resources and related sidelink positioning configurations.
  • a sidelink positioning server UE may serve as a configuration entity.
  • aspects of the described techniques for this disclosure include solutions and implementations for SL-U positioning, while maintaining the minimum channel occupancy and power spectral density (PSD) requirements.
  • this disclosure details solutions that include support for multiple SL-U SL-PRS physical resource allocation structures, including a first configuration of a common or shared resource pool structure enabling RB-sets defined for SL-PRS transmissions, and for sidelink data (PSSCH) transmissions.
  • PSSCH sidelink data
  • the physical resource allocation structures include a second configuration of a common or shared resource pool structure enabling RB-sets, which include SL-PRS transmissions and SL data (PSSCH) transmissions, and include a third configuration of a dedicated resource pool structure enabling RB-sets, which include only SL-PRS transmissions.
  • This disclosure also details solutions that include support to define configurations for interlaced SL-PRS transmission from multiple transmitting UEs, support for SL-PRS Tx and/or Rx frequency hopping across RB-sets based on the interlaces in each RB-set, and support to enable collection of sidelink assistance data error for computing a sidelink positioning integrity result.
  • a positioning-related reference signal may be referred to as a reference signal used for positioning procedures or purposes in order to estimate a target-UE’s location, such as a PRS, or based on existing reference signals such as channel state information (CSI)-RS or SRS.
  • a target-UE may be referred to as the device or entity to be localized and/or positioned.
  • the term PRS may refer to any signal, such as a reference signal, which may or may not be used primarily for positioning.
  • any reference made to position, location information, and/or estimates may refer to an absolute position or a relative position with respect to another node or entity, ranging in terms of distance, ranging in terms of direction, or combination thereof.
  • aspects of the present disclosure include various SL-PRS physical resource allocation structures that can be implemented to support unlicensed operations based on resource pools and RB-sets (e.g., categorize the RB-sets).
  • a shared resource pool structure also referred to herein as a common resource pool structure
  • a shared resource pool structure can be enabled in terms of RB-sets defined for SL-PRS transmissions, and for SL data (PSSCH) transmissions.
  • a shared resource pool is equivalent to a common resource pool for SL-PRS and sidelink data transmission
  • the SL data transmissions can include 2 nd stage sidelink control information (SCI), sidelink shared channel (SL-SCH), and physical sidelink feedback channel (PSECH) (where applicable). This enables flexible bandwidth allocation of SL-PRS corresponding to the RB-set bandwidth depending on successful LBT channel access.
  • Figure 7 illustrates an example of a first SL-U SL-PRS PRAS 700 of an unlicensed shared resource pool, in accordance with aspects of the present disclosure.
  • RP sidelink shared resource pool
  • the SL-PRS bandwidth is at least the same as one or more configured RB-sets.
  • the SL-PRS and/or SL data RB-sets may be configured in a contiguous manner, which will enable multi-channel access (e.g., RB-Set 0 and RB-Set 1 in the example Figure 7 may be configured to transmit SL-PRS. This will be beneficial for enhanced accuracy where SL-PRS is transmitted over larger BWs reflected over multiple contiguous RB-sets.
  • the intra-cell (inter- RB-set) guard bands can be used for data or PRS transmissions, as appropriate, for improved spectral efficiency of the transmission.
  • the SL-PRS within the RB-sets may be associated with a priority and may be signaled using layer-1 (e.g., 1 st or 2 nd stage SCI, or higher layer signaling (e.g., SLPP to the receiving UE for prioritization of sidelink positioning measurements).
  • layer-1 e.g., 1 st or 2 nd stage SCI, or higher layer signaling (e.g., SLPP to the receiving UE for prioritization of sidelink positioning measurements).
  • Multiple priorities may be associated to a shared resource pool or RB-sets within the shared resource pool.
  • interlaced RB transmissions may be configured to the RB-sets configured for SL-PRS with P interlaces, which are equally spaced given by a parameter Q RBs between each interlace.
  • Different Tx IDs may be identified in the configuration using source-IDs, a session ID, destination-IDs, or other globally uniquely identifying layer- 1 or layer-2 UE IDs (e.g., an anchor UE ID, or UE-IDs such as 5GS-temporary mobile subscriber identity (TMSI)).
  • TMSI 5GS-temporary mobile subscriber identity
  • the subchannels within a sidelink positioning RB-set are also defined with an associated offset to carrier value, which describes the offset in frequency domain between Point A and the lowest usable subcarrier on the sidelink carrier in number of PRBs.
  • Each SL-PRS subchannel within an RB-set configured for SL-PRS is defined by #M contiguous PRBs, while each sidelink data subchannel within a RB-set configured for SL-Data is defined by #L contiguous PRBs.
  • each RB-set is assumed to have an LBT bandwidth of 20 MHz, which depends on the subcarrier spacing, therefore an RB-set may include 106 PRBs for 15 kHz SCS, 51 PRBs for 30 kHz SCS, or 24 PRBs for 60 kHz SCS .
  • the Intra-cell guard band PRBs between RB-sets can be configured with various options, including a first option in which the intra-cell guard band PRBs can be configured with additional SL-PRS subchannels to have wider bandwidth, which is an incremental number of PRBs defined by the guard band.
  • the intra- cell guard band PRBs can be configured with additional sidelink data subchannels to have a higher data transmission bandwidth, which is an incremental number of PRBs defined by the guard band.
  • the above options may be signaled to the UE via lower layer (SCI, medium access control element (MAC CE)) or higher-layer (RRC, SLPP) signaling (e.g., using a flag).
  • the above configuration characteristics may be signaled from the configuration entity towards the UE or communication device transmitting SL-PRS over unlicensed bands.
  • the configuration entity can be implemented as a gNB, a location server (e.g., LMF, or a UE or communication device, such as a server UE), an anchor UE (reference UE) with or without a known location, and/or a target-UE.
  • Signaling mechanisms to transfer the above SL-U SL-PRS configuration information may include downlink control information (DCI), 1 st or 2 nd stage SCI, MAC CE, RRC, SLPP (e.g., RequestSLAssistanceData or ProvideSLAssistanceDatd), or a combination thereof.
  • DCI downlink control information
  • 1 st or 2 nd stage SCI e.g., MAC CE, RRC, SLPP (e.g., RequestSLAssistanceData or ProvideSLAssistanceDatd), or
  • the above configuration characteristics may be signaled to multiple UEs using broadcast or groupcast signaling (e.g., using normal system information block (SIB) or posSIB information). New SIBs may be defined for this purpose, or existing SIBs may be extended to accommodate this configuration information.
  • SIB system information block
  • posSIB information e.g., posSIB information
  • a common or shared resource pool structure can be enabled in terms of RB-sets, which include SL-PRS transmissions and sidelink data (PSSCH) transmissions.
  • the sidelink data transmissions include 2nd Stage SCI, SL-SCH, and PSFCH (where applicable). This enables flexible bandwidth allocation of SL-PRS corresponding to the RB-set bandwidth.
  • FIG. 8 illustrates an example of a second SL-U SL-PRS PRAS 800 of an unlicensed shared resource pool, in accordance with aspects of the present disclosure.
  • RP sidelink shared resource pool
  • the SL-PRS is time division multiplexed (TDMed) with the PSSCH.
  • the SL-PRS bandwidth is at least the same as the PSSCH bandwidth.
  • the SL-PRS comb-size configuration within one or more shared RB-sets may be configured with the same or different comb size configuration depending on the number of symbols allocated to SL-PRS within a slot, which will enable multi-channel access (e.g., according to Figure 8), RB-set 0 and RB-Set 1 may have a same comb size configuration of SL-PRS of (2,2) or in another implementation, RB-set 0 may have a comb size configuration of (2,2) and RB-set 1 may have a comb size configuration of (4, 4).
  • the SL-PRS within the RB-sets may be associated with a priority and may be signaled using layer-1 (e.g., 1 st or 2 nd stage SCI), or higher layer signaling (e.g., SLPP to the receiving UE for prioritization of sidelink positioning measurements.
  • layer-1 e.g., 1 st or 2 nd stage SCI
  • higher layer signaling e.g., SLPP to the receiving UE for prioritization of sidelink positioning measurements.
  • Multiple priorities may be associated to a shared resource pool or RB-sets within the shared resource pool.
  • AGC automatic gain control
  • interlaced RB transmissions can be configured to the shared SL-PRS and SL-Data RB-sets with P-interlaces, which are equally spaced given by a parameter Q RBs between each interlace.
  • the subchannels within the shared SL-PRS and SL-Data RB-sets are also defined with an associated offset to carrier value, which describes the offset in frequency domain between Point A and the lowest usable subcarrier on the sidelink carrier in number of PRBs.
  • Each SL-PRS subchannel within the shared SL-PRS and SL-Data RB-sets is defined by #M contiguous PRBs, while each sidelink data subchannel within a SL-Data RB-set is defined by #L contiguous PRBs.
  • Each shared SL-PRS and SL-Data RB-sets is at least configured to the LBT bandwidth of 20 MHz, which depends on the subcarrier spacing of 106 PRBs for 15 kHz SCS, 51 PRBs for 30 kHz SCS, or 24 PRBs for 60 kHz SCS.
  • the intra-cell guard band PRBs between RB-sets may be configured with various options, including an option that the intra-cell guard band PRBs can be configured with additional shared subchannels to either accommodate more SL-PRS symbols or more PSSCH symbols within a slot, which is an incremental number of PRBs defined by the guard band.
  • This option may be signaled to the UE via lower layer (SCI, MAC CE) or higher-layer (RRC, SLPP) signaling (e.g., using a flag).
  • the above configuration characteristics can be signaled from the configuration entity towards the UE or communication device transmitting SL-PRS and/or sidelink data over unlicensed bands.
  • the Rx UE indicates or requests receiving either SL-PRS or sidelink data
  • the Rx UE can receive a configuration information element related to the part of the slot that contains the desired reception signals and/or channels.
  • the configuration entity can be implemented as a gNB, a location server (e.g., LME, or a UE or communication device, such as a server UE), an anchor UE (reference UE) with or without a known location, or and/or a target-UE.
  • Signaling mechanisms to transfer the SL-U SL-PRS configuration information can include DCI, 1 st or 2 nd stage SCI, MAC CE, RRC, SLPP (e.g., RequestSLAssistanceData or ProvideSLAssistanceData), or a combination thereof.
  • the above configuration characteristics can be signaled to multiple UEs using broadcast or groupcast signaling (e.g., using normal SIB or posSIB information). New SIBs can be defined for this purpose or existing SIBs may be extended to accommodate this configuration information.
  • a dedicated resource pool structure can be enabled in terms of RB-sets, which includes only SL-PRS transmissions. These RB-sets can include one or more contiguous RB-sets to transmit SL-PRS over wider bandwidth depending on successful LBT channel access.
  • FIG. 9 illustrates an example of a third SL-U SL-PRS PRAS 900, in accordance with aspects of the present disclosure.
  • RP resource pool
  • SL-PRS only implies that the RB-set includes physical sidelink control channel (PSCCH) (control), which may schedule SL-PRS transmissions.
  • PSCCH physical sidelink control channel
  • control may schedule SL-PRS transmissions.
  • multiple (M,N) comb size configurations within a slot are supported only when the different (M, N) pairs are always multiplexed via TDM to different sets of symbols in a slot.
  • the SL-PRS comb-size configuration within one or more SL-PRS only RB-sets can be configured with the multiple (M,N) comb size configurations in TDMed configuration, depending on the number of symbols allocated to each SL-PRS comb-size configuration within a slot, which will enable multi-channel access.
  • RB-set 0 and RB-Set 1 may have the same comb size configuration of SE-PRS of (2,2) or in another implementation, RB-set 0 may have a comb size configuration of (2,2), and RB-set 1 may have a comb size configuration of (4, 4).
  • This will be beneficial for flexible SE-PRS configurations over different RB-sets which may depend on the requested location accuracy.
  • multiple SL-PRS comb size configurations with different (M,N) pairs can be configured within a single slot in a TDM manner.
  • the SL-PRS bandwidth is at least the same as the RB-set bandwidth and in the case of multi-channel access, the SL-PRS bandwidth may be at least same as the RP bandwidth.
  • the SL-PRS RB-sets can be configured in a contiguous manner, which will enable multi-channel access (e.g., RB-set 0, RB-Set 1, and RB-Set 2 in Figure 9 can be configured to transmit SL-PRS depending on successful LBT). This will be beneficial for enhanced accuracy where the configured SL-PRS may be transmitted over larger BWs within a RP reflected over multiple contiguous RB-sets.
  • interlaced RB transmissions can be configured to the shared SL-PRS and SL-Data RB-sets with P interlaces, which are equally spaced given by a parameter Q RBs between each interlace.
  • the subchannels within the SL-PRS only RB-sets are also defined with an associated offset to carrier value, which describes the offset in frequency domain between Point A and the lowest usable subcarrier on the sidelink carrier in a number of PRBs.
  • Each SL-PRS subchannel within the SL-PRS only RB-sets is defined by #M contiguous PRBs, while each sidelink data subchannel within a SL-Data RB-set is defined by #L contiguous PRBs.
  • each SL-PRS only RB-sets is at least configured to the LBT bandwidth of 20 MHz, which depends on the subcarrier spacing of 106 PRBs for 15 kHz SCS, 51 PRBs for 30 kHz SCS, or 24 PRBs for 60 kHz SCS.
  • the intercell guard band PRBs between SL-PRS only RB-sets can be configured with an option that the intercell guard band PRBs may be configured with additional SL-PRS only subchannels to accommodate more SL-PRS symbols, which provides a wider bandwidth.
  • the option can be signaled to the UE via lower layer (SCI, MAC CE) or higher-layer (RRC, SLPP) signaling (e.g., using a flag).
  • the above configuration characteristics can be signaled from the configuration entity towards the UE or communication device transmitting SL-PRS over unlicensed bands.
  • the configuration entity may be a gNB, a location server (e.g., LMF, or UE or communication device, such as a server UE), an anchor UE (reference UE) with or without a known location, and/or a target-UE.
  • Signaling mechanisms to transfer the above SL-U SL-PRS configuration information can include DCI, 1 st or 2 nd stage SCI, MAC CE, RRC, SLPP (e.g., RequestSLAssistanceData or ProvideSLAssistanceDatd), or a combination thereof.
  • the configuration characteristics can be signaled to multiple UEs using broadcast or groupcast signaling (e.g., using normal SIB or posSIB information). New SIBs can be defined for this purpose, or existing SIBs may be extended to accommodate this configuration information.
  • the time-frequency resources to perform sidelink positioning over the unlicensed band should be configured such that PSD and minimum channel occupancy requirements are satisfied, while achieving the target accuracy (e.g., absolute, relative horizontal, and/or vertical accuracy requirements).
  • a solution to satisfy the occupied channel bandwidth and PSD requirement is to perform interlaced SL-PRS transmissions, considering a SL-PRS resource-based allocation scheme.
  • interlaced SL-PRS transmissions can enable multiplexing of different SL-PRS transmissions over the LBT bandwidth.
  • SL-PRS resources are defined with respect to a slot, which is characterized by a SL PRS resource ID, a SL-PRS resource set ID, a SL-PRS TRP ID, SL-PRS comb offsets and associated SL-PRS comb sizes (N), SL-PRS starting symbols and a number of SL-PRS symbols (M), SL-PRS frequency domain allocation in terms of subchannel size and associated number of PRBs.
  • the combination of a SL PRS resource ID and frequency domain allocation may uniquely identify a SL-PRS resource within a slot.
  • the SL-PRS resources defined with respect to a slot can also be characterized by a SL-PRS resource set ID, SL-PRS dedicated resource pool consisting of SL-PRS control (e.g., PSCCH and SL-PRS only transmissions), SL-PRS common or shared pool consisting of SL-PRS control (e.g., PSCCH, PSSCH (sidelink data) and SL-PRS transmissions), SL-BWP, and/or sidelink carrier.
  • the frequency domain granularity of sidelink consists of sub-channels, which are defined as a set of contiguous PRBs, and may be extended to SL-U SL-PRS transmissions. Therefore, in aspects of the described techniques, the SL-PRS resource configuration and corresponding transmission behavior may correspond to a set of P interlaces per subchannel. This set of P interlaces are applied to time-frequency resources used for positioning purposes. In other implementations, this set of P interlaces correspond to time-frequency resources used for data and positioning. In an extended implementation, the set of P interlaces may be equally or unequally spaced apart with Q interlaces spacings.
  • a single Q value may be configured, however if there are multiple unequal spacing between interlaces, then multiple Q values may be configured starting from the lowest subchannel (e.g., QI, Q2, Q3, etc.) depending on the number unequal interlaces.
  • a single interlace may be equally or unequally spaced apart with Q PRBs (e.g., for a given SL-PRS subchannel associated to a RB-set, Q spacings between PRBs of the same interlace can be configured.
  • the interlaces and subchannel size correspond to a LBT bandwidth of 20 MHz and meet the minimum occupied channel bandwidth requirements as per the regulatory requirements, which may be referred to as an RB-set. Therefore, the SL-U SL-PRS (pre-)configuration may be characterized by at least one or more configuration elements, including a subchannel size (in PRBs) and a number of subchannels, where each subchannel is configured with P interlaces spaced by Q PRBs.
  • the Q value may reflect equal spacing between interlaces or in another implementation, the Q value may reflect unequal spacing between interlaces .
  • the one or more configuration elements also include an interlacing index according to various options, including a first option for an interlacing index starting from the lowest subcarrier and incremented until the highest subcarrier index, and a second option for an interlacing index as a function of the number of interlaces within an RB-set as depicted in Figure 10.
  • the one or more configuration elements also include a number of SL-PRS interlaces associated to an RB-set, and each RB-set is at least configured to the LBT bandwidth of 20 MHz, which depends on the subcarrier spacing as 106 PRBs for 15 kHz SCS, 51 PRBs for 30 kHz SCS, or 24 PRBs for 60 kHz SCS.
  • the one or more configuration elements also include: an offset to carrier associated with each interlace, wherein the start of the carrier corresponds to the lowest subchannel index or frequency location within a configured resource pool; a SL-PRS resource pool identified by a pre-defined ID corresponding to either a SL-PRS dedicated resource pool, or common or shared resource pool; different Tx IDs may be identified in the configuration using source-IDs, a session ID, destination- IDs, or other globally uniquely identifying layer- 1 or layer-2 UE IDs (e.g., an anchor UE ID, UE-IDs such as 5GS-TMSI.A SL PRS resource ID); SL-PRS comb offsets and associated SL-PRS comb sizes (N); SL-PRS starting symbols and a number of SL-PRS symbols (M); a SL BWP identified by a pre-defined ID; and/or a sidelink carrier identified by a pre-defined ID.
  • an anchor UE ID e.g., an anchor UE ID
  • FIG. 10 illustrates an example 1000 of an SL-U interlaced SL-PRS configuration for multiplexing different SL-PRS transmissions, in accordance with aspects of the present disclosure.
  • the SL-U interlaced SL-PRS configuration can be signaled from a configuration entity, such as a base station (e.g., a gNB, a location server, a sidelink positioning server UE, an anchor UE, or target-UE).
  • a base station e.g., a gNB, a location server, a sidelink positioning server UE, an anchor UE, or target-UE.
  • the signaling can include UE-specific signaling, or unicast, groupcast, or broadcast signaling, which may be carried via LTE positioning protocol (LPP), SLPP, RRC, positioning SIBs, and/or normal SIBs.
  • LTE positioning protocol LTE positioning protocol
  • the configuration characteristics can be signaled from the configuration entity to the UE or communication device transmitting SL-PRS over unlicensed bands.
  • the configuration entity may be implemented as a gNB, a location server (e.g., a LMF, or a UE or communication device, such as a server UE, an anchor UE (reference UE) with or without a known location, and/or a target-UE).
  • Signaling mechanisms to transfer the above SL-U SL-PRS configuration information can include DCI, 1 st or 2 nd stage SCI, MAC CE, RRC, SLPP
  • the above configuration characteristics can be signaled to multiple UEs using broadcast or groupcast signaling (e.g., using normal SIB or posSIB information). New SIBs can be defined for this purpose, or existing SIBs may be extended to accommodate this configuration information.
  • a UE can be implemented to perform transmit frequency hopping of SL-PRS across RB-sets as a function of a number of hops, which is equivalent to the number of interlaces for its own SL-PRS transmission.
  • Figure 11 illustrates an example 1100 of Tx and/or Rx frequency hopping of SL-PRS using the interlace structure, in accordance with aspects of the present disclosure. This example is illustrative of frequency hopping of two UEs performing SL-PRS using the interlace structure.
  • This enables UE- 1 and UE-2 to exploit its allocated interlaces as part of a wider frequency hopping configuration in order to provide a wider bandwidth measurement across different LBT bandwidths (multiple RB-sets).
  • the UE can transmit the SL-PRS Tx frequency hopping configuration based on various information elements, including any one or more sidelink positioning measurements, including RSTD (SL-TDOA DL-type), SL-RTOA (SL-TDOA UL-type), SL-AOA, UE Rx-Tx time difference measurements including RTT-type solutions using sidelink single-sided and/or RTT-type solutions using sidelink double-sided, which can be derived over multiple hops corresponding to the interlaces of each RB-set.
  • RSTD SL-TDOA DL-type
  • SL-RTOA SL-TDOA UL-type
  • SL-AOA SL-AOA
  • UE Rx-Tx time difference measurements including RTT-type solutions using sidelink single-sided and/or RTT-type solutions using sidelink double-sided, which can be derived over multiple hops corresponding to the interlaces of each RB-set.
  • the various information elements also include a time duration between hops across RB-sets depending on LBT success or failure corresponding to each RB-set, RF switching time between hops, and ensure that the numerology and bandwidth between hops are the same across RB-sets.
  • the numerologies and bandwidths of different RB-sets may be different.
  • each interlace is associated with #L PRBs.
  • the above configuration may also be equally applicable to a Rx frequency hopping configuration, where a UE can receive SL-PRS across multiple Rx frequency hops across different RB-sets.
  • the above configuration characteristics can be signaled from the configuration entity to the UE or communication device transmitting SL-PRS over unlicensed bands.
  • the configuration entity may be a gNB, a location server (e.g., a LMF, or UE or communication device, such as a server UE, an anchor UE (reference UE) with or without a known location, a target-UE.
  • Signaling mechanisms to transfer the above SL-U SL-PRS configuration information can include DCI, 1 st or 2 nd stage SCI, MAC CE, RRC, SLPP (e.g., RequestSLAssistanceData or ProvideSLAssistanceDatd) or a combination thereof.
  • the above configuration characteristics can be signaled to multiple UEs using broadcast or groupcast signaling (e.g., using normal SIB or posSIB information). New SIBs can be defined for this purpose, or existing SIBs may be extended to accommodate this configuration information.
  • aspects of the resource configuration from Figures 7 through 11 may be applicable to Mode 1/Scheme 1 - centralized resource allocation schemes, or Mode 2/Scheme 2 - distributed and autonomous resource allocation schemes.
  • FIG. 12 illustrates an example of a UE 1200 in accordance with aspects of the present disclosure.
  • the UE 1200 may include a processor 1202, a memory 1204, a controller 1206, and a transceiver 1208.
  • the processor 1202, the memory 1204, the controller 1206, or the transceiver 1208, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. These components may be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces.
  • the processor 1202, the memory 1204, the controller 1206, or the transceiver 1208, or various combinations or components thereof may be implemented in hardware (e.g., circuitry).
  • the hardware may include a processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), or other programmable logic device, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • the processor 1202 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination thereof). In some implementations, the processor 1202 may be configured to operate the memory 1204. In some other implementations, the memory 1204 may be integrated into the processor 1202. The processor 1202 may be configured to execute computer-readable instructions stored in the memory 1204 to cause the UE 1200 to perform various functions of the present disclosure.
  • an intelligent hardware device e.g., a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination thereof.
  • the processor 1202 may be configured to operate the memory 1204. In some other implementations, the memory 1204 may be integrated into the processor 1202.
  • the processor 1202 may be configured to execute computer-readable instructions stored in the memory 1204 to cause the UE 1200 to perform various functions of the present disclosure.
  • the memory 1204 may include volatile or non-volatile memory.
  • the memory 1204 may store computer-readable, computer-executable code including instructions when executed by the processor 1202 cause the UE 1200 to perform various functions described herein.
  • the code may be stored in a non-transitory computer-readable medium such as the memory 1204 or another type of memory.
  • Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer.
  • the processor 1202 and the memory 1204 coupled with the processor 1202 may be configured to cause the UE 1200 to perform one or more of the functions described herein (e.g., executing, by the processor 1202, instructions stored in the memory 1204).
  • the processor 1202 may support wireless communication at the UE 1200 in accordance with examples as disclosed herein.
  • the UE 1200 may be configured to or operable to support a means for receiving a resource allocation configuration to perform SL-PRS transmission over unlicensed carriers, the resource allocation configuration comprising at least RB sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs; and transmitting at least one SL-PRS over an unlicensed carrier based at least in part on the resource allocation configuration.
  • the UE 1200 may be configured to support any one or combination of the method further comprising transmitting the at least one SL-PRS over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the method further comprising transmitting multiple SL-PRSs over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the method further comprising transmitting a resource allocation configuration request, and in response, receiving the resource allocation configuration.
  • the resource allocation configuration is pre-configured by at least one of the UE or a communication device.
  • the UE is at least one of a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside unit.
  • the method further comprising transmitting the at least one SL-PRS over the unlicensed carrier to a communication device, the communication device being at least one of a base station, a location server, a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside -unit.
  • the resource allocation configuration indicates a shared resource pool structure with at least one of RB sets defined for SL-PRS and associated sidelink control information, or the RB sets defined for sidelink data and the associated sidelink control information.
  • the resource allocation configuration indicates a shared resource pool structure with RB sets defined for SL-PRS, sidelink data, and associated sidelink control information.
  • the resource allocation configuration indicates a dedicated resource pool structure with RB sets defined for SL-PRS and associated sidelink control information.
  • the resource allocation configuration comprises at least one of a sidelink BWP, a sidelink positioning resource pool defined in terms of the RB sets, a SL-PRS bandwidth indication, or an indication of contiguous PRB resource allocation or interlaced PRS resource allocation.
  • a sidelink positioning RB set configuration comprises at least one of multiple SL-PRS resource IDs, SL-PRS resource set IDs, SL-PRS transmission-reception point IDs, SL-PRS comb offsets and associated SL-PRS comb sizes, SL-PRS starting symbols and a number of SL-PRS symbols, a number of subchannels, or a channel size.
  • a sidelink positioning RB set configuration comprises multiple interlaced transmissions for SL-PRS RB sets with a number of interlaces that are equally spaced according to a parameter that indicates the number of interlaces or RBs between each of the multiple interlaced RB transmissions.
  • the sidelink positioning RB set configuration is associated with different sidelink positioning transmitters differentiated by IDs comprising at least one of a source-ID, a session-ID, a destination-ID, a unique layer- 1 ID, or a unique layer-2 ID.
  • Signaling for the resource allocation configuration includes at least one of a lower-layer UE-specific signaling, a higher-layer UE-specific signaling, or broadcast signaling.
  • Intra-cell guard bands are configured for sidelink data or the SL-PRS transmission.
  • At least one of a transmit frequency hopping for SL-PRS or a receive frequency hopping for SL-PRS is enabled across the RB sets based at least in part on a received frequency hopping configuration comprising one or more sidelink positioning measurements corresponding to at least one of one or more hops, a time between the one or more hops, a same numerology and bandwidth among the one or more hops, a different numerology and bandwidth among the one or more hops, or a switching time between the one or more hops.
  • the UE 1200 may support at least one memory and at least one processor coupled with the at least one memory and configured to cause the UE to: receive a resource allocation configuration to perform SL-PRS transmission over unlicensed carriers, the resource allocation configuration comprising at least RB sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs; and transmit at least one SL-PRS over an unlicensed carrier based at least in part on the resource allocation configuration.
  • the UE 1200 may be configured to support any one or combination of the at least one processor is configured to cause the UE to transmit the at least one SL-PRS over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the at least one processor is configured to cause the UE to transmit the multiple SL-PRSs over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the at least one processor is configured to cause the UE to transmit a resource allocation configuration request, and in response, receive the resource allocation configuration.
  • the resource allocation configuration is pre-configured by at least one of the UE or a communication device.
  • the UE is at least one of a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside unit.
  • the at least one processor is configured to cause the UE to transmit the at least one SL-PRS over the unlicensed carrier to a communication device, the communication device being at least one of a base station, a location server, a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside-unit.
  • the resource allocation configuration indicates a shared resource pool structure with at least one of RB sets defined for SL-PRS and associated sidelink control information, or the RB sets defined for sidelink data and the associated sidelink control information.
  • the resource allocation configuration indicates a shared resource pool structure with RB sets defined for SL-PRS, sidelink data, and associated sidelink control information.
  • the resource allocation configuration indicates a dedicated resource pool structure with RB sets defined for SL-PRS and associated sidelink control information.
  • the resource allocation configuration comprises at least one of a sidelink BWP, a sidelink positioning resource pool defined in terms of the RB sets, a SL-PRS bandwidth indication, or an indication of contiguous PRB resource allocation or interlaced PRS resource allocation.
  • a sidelink positioning RB set configuration comprises at least one of multiple SL-PRS resource IDs, SL-PRS resource set IDs, SL-PRS transmission-reception point IDs, SL-PRS comb offsets and associated SL-PRS comb sizes, SL-PRS starting symbols and a number of SL-PRS symbols, a number of subchannels, or a channel size.
  • a sidelink positioning RB set configuration comprises multiple interlaced transmissions for SL-PRS RB sets with a number of interlaces that are equally spaced according to a parameter that indicates the number of interlaces or RBs between each of the multiple interlaced RB transmissions.
  • the sidelink positioning RB set configuration is associated with different sidelink positioning transmitters differentiated by IDs comprising at least one of a source-ID, a session-ID, a destination-ID, a unique layer- 1 ID, or a unique layer-2 ID.
  • Signaling for the resource allocation configuration includes at least one of a lower-layer UE-specific signaling, a higher-layer UE-specific signaling, or broadcast signaling.
  • Intra-cell guard bands are configured for sidelink data or the SL-PRS transmission.
  • At least one of a transmit frequency hopping for SL-PRS or a receive frequency hopping for SL-PRS is enabled across the RB sets based at least in part on a received frequency hopping configuration comprising one or more sidelink positioning measurements corresponding to at least one of one or more hops, a time between the one or more hops, a same numerology and bandwidth among the one or more hops, a different numerology and bandwidth among the one or more hops, or a switching time between the one or more hops.
  • the controller 1206 may manage input and output signals for the UE 1200.
  • the controller 1206 may also manage peripherals not integrated into the UE 1200.
  • the controller 1206 may utilize an operating system such as iOS®, ANDROID®, WINDOWS®, or other operating systems.
  • the controller 1206 may be implemented as part of the processor 1202.
  • the UE 1200 may include at least one transceiver 1208. In some other implementations, the UE 1200 may have more than one transceiver 1208.
  • the transceiver 1208 may represent a wireless transceiver.
  • the transceiver 1208 may include one or more receiver chains 1210, one or more transmitter chains 1212, or a combination thereof.
  • a receiver chain 1210 may be configured to receive signals (e.g., control information, data, packets) over a wireless medium.
  • the receiver chain 1210 may include one or more antennas to receive a signal over the air or wireless medium.
  • the receiver chain 1210 may include at least one amplifier (e.g., a low-noise amplifier (LNA)) configured to amplify the received signal.
  • the receiver chain 1210 may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal.
  • the receiver chain 1210 may include at least one decoder for decoding the demodulated signal to receive the transmitted data.
  • a transmitter chain 1212 may be configured to generate and transmit signals
  • the transmitter chain 1212 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium.
  • the at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM), frequency modulation (FM), or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM).
  • the transmitter chain 1212 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium.
  • the transmitter chain 1212 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.
  • FIG. 13 illustrates an example of a processor 1300 in accordance with aspects of the present disclosure.
  • the processor 1300 may be an example of a processor configured to perform various operations in accordance with examples as described herein.
  • the processor 1300 may include a controller 1302 configured to perform various operations in accordance with examples as described herein.
  • the processor 1300 may optionally include at least one memory 1304, which may be, for example, an L1/L2/L3 cache. Additionally, or alternatively, the processor 1300 may optionally include one or more arithmetic-logic units (ALUs) 1306.
  • ALUs arithmetic-logic units
  • the processor 1300 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein.
  • a protocol stack e.g., a software stack
  • operations e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading
  • the processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 1300) or other memory (e.g., random access memory (RAM), read-only memory (ROM), dynamic RAM (DRAM), synchronous dynamic RAM (SDRAM), static RAM (SRAM), ferroelectric RAM (FeRAM), magnetic RAM (MRAM), resistive RAM (RRAM), flash memory, phase change memory (PCM), and others).
  • RAM random access memory
  • ROM read-only memory
  • DRAM dynamic RAM
  • SDRAM synchronous dynamic RAM
  • SRAM static RAM
  • FeRAM ferroelectric RAM
  • MRAM magnetic RAM
  • RRAM resistive RAM
  • flash memory phase change memory
  • PCM phase change memory
  • the controller 1302 may be configured to manage and coordinate various operations (e.g., signaling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 1300 to cause the processor 1300 to support various operations in accordance with examples as described herein.
  • the controller 1302 may operate as a control unit of the processor 1300, generating control signals that manage the operation of various components of the processor 1300. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.
  • the controller 1302 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 1304 and determine subsequent instruction(s) to be executed to cause the processor 1300 to support various operations in accordance with examples as described herein.
  • the controller 1302 may be configured to track memory addresses of instructions associated with the memory 1304.
  • the controller 1302 may be configured to decode instructions to determine the operation to be performed and the operands involved.
  • the controller 1302 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 1300 to cause the processor 1300 to support various operations in accordance with examples as described herein.
  • the controller 1302 may be configured to manage flow of data within the processor 1300.
  • the controller 1302 may be configured to control transfer of data between registers, ALUs 1306, and other functional units of the processor 1300.
  • the memory 1304 may include one or more caches (e.g., memory local to or included in the processor 1300 or other memory, such as RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc.
  • the memory 1304 may reside within or on a processor chipset (e.g., local to the processor 1300). In some other implementations, the memory 1304 may reside external to the processor chipset (e.g., remote to the processor 1300).
  • the memory 1304 may store computer-readable, computer-executable code including instructions that, when executed by the processor 1300, cause the processor 1300 to perform various functions described herein.
  • the code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory.
  • the controller 1302 and/or the processor 1300 may be configured to execute computer-readable instructions stored in the memory 1304 to cause the processor 1300 to perform various functions.
  • the processor 1300 and/or the controller 1302 may be coupled with or to the memory 1304, the processor 1300, and the controller 1302, and may be configured to perform various functions described herein.
  • the processor 1300 may include multiple processors and the memory 1304 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.
  • the one or more ALUs 1306 may be configured to support various operations in accordance with examples as described herein.
  • the one or more ALUs 1306 may reside within or on a processor chipset (e.g., the processor 1300).
  • the one or more ALUs 1306 may reside external to the processor chipset (e.g., the processor 1300).
  • One or more ALUs 1306 may perform one or more computations such as addition, subtraction, multiplication, and division on data.
  • one or more ALUs 1306 may receive input operands and an operation code, which determines an operation to be executed.
  • One or more ALUs 1306 may be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 1306 may support logical operations such as AND, OR, exclusive-OR (XOR), not-OR (NOR), and not-AND (NAND), enabling the one or more ALUs 1306 to handle conditional operations, comparisons, and bitwise operations.
  • logical operations such as AND, OR, exclusive-OR (XOR), not-OR (NOR), and not-AND (NAND)
  • the processor 1300 may be configured to support any one or combination of the at least one controller is configured to cause the processor to transmit the at least one SL-PRS over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the at least one controller is configured to cause the processor to transmit the multiple SL-PRSs over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the at least one controller is configured to cause the processor to transmit a resource allocation configuration request, and in response, receive the resource allocation configuration.
  • the resource allocation configuration is pre-configured by at least one of a UE or a communication device.
  • the UE is at least one of a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside unit.
  • the at least one controller is configured to cause the processor to transmit the at least one SL-PRS over the unlicensed carrier to a communication device, the communication device being at least one of a base station, a location server, a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside-unit.
  • the resource allocation configuration indicates a shared resource pool structure with at least one of RB sets defined for SL-PRS and associated sidelink control information, or the RB sets defined for sidelink data and the associated sidelink control information.
  • the resource allocation configuration indicates a shared resource pool structure with RB sets defined for SL-PRS, sidelink data, and associated sidelink control information.
  • the resource allocation configuration indicates a dedicated resource pool structure with RB sets defined for SL-PRS and associated sidelink control information.
  • the resource allocation configuration comprises at least one of a sidelink BWP, a sidelink positioning resource pool defined in terms of the RB sets, a SL-PRS bandwidth indication, or an indication of contiguous PRB resource allocation or interlaced PRS resource allocation.
  • a sidelink positioning RB set configuration comprises at least one of multiple SL-PRS resource IDs, SL-PRS resource set IDs, SL-PRS transmission-reception point IDs, SL-PRS comb offsets and associated SL-PRS comb sizes, SL-PRS starting symbols and a number of SL-PRS symbols, a number of subchannels, or a channel size.
  • a sidelink positioning RB set configuration comprises multiple interlaced transmissions for SL-PRS RB sets with a number of interlaces that are equally spaced according to a parameter that indicates the number of interlaces or RBs between each of the multiple interlaced RB transmissions.
  • the sidelink positioning RB set configuration is associated with different sidelink positioning transmitters differentiated by IDs comprising at least one of a source-ID, a session-ID, a destination-ID, a unique layer- 1 ID, or a unique layer-2 ID.
  • Signaling for the resource allocation configuration includes at least one of a lower-layer UE-specific signaling, a higher-layer UE-specific signaling, or broadcast signaling.
  • Intra-cell guard bands are configured for sidelink data or the SL-PRS transmission.
  • At least one of a transmit frequency hopping for SL-PRS or a receive frequency hopping for SL-PRS is enabled across the RB sets based at least in part on a received frequency hopping configuration comprising one or more sidelink positioning measurements corresponding to at least one of one or more hops, a time between the one or more hops, a same numerology and bandwidth among the one or more hops, a different numerology and bandwidth among the one or more hops, or a switching time between the one or more hops.
  • FIG. 14 illustrates an example of a communication device 1400 in accordance with aspects of the present disclosure.
  • the communication device 1400 may include a processor 1402, a memory 1404, a controller 1406, and a transceiver 1408.
  • the processor 1402, the memory 1404, the controller 1406, or the transceiver 1408, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. These components may be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces.
  • the processor 1402, the memory 1404, the controller 1406, or the transceiver 1408, or various combinations or components thereof may be implemented in hardware (e.g., circuitry).
  • the hardware may include a processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), or other programmable logic device, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure.
  • DSP digital signal processor
  • ASIC application-
  • the processor 1402 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination thereof). In some implementations, the processor 1402 may be configured to operate the memory 1404. In some other implementations, the memory 1404 may be integrated into the processor 1402. The processor 1402 may be configured to execute computer-readable instructions stored in the memory 1404 to cause the communication device 1400 to perform various functions of the present disclosure.
  • an intelligent hardware device e.g., a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination thereof.
  • the processor 1402 may be configured to operate the memory 1404. In some other implementations, the memory 1404 may be integrated into the processor 1402.
  • the processor 1402 may be configured to execute computer-readable instructions stored in the memory 1404 to cause the communication device 1400 to perform various functions of the present disclosure.
  • the memory 1404 may include volatile or non-volatile memory.
  • the memory 1404 may store computer-readable, computer-executable code including instructions when executed by the processor 1402 cause the communication device 1400 to perform various functions described herein.
  • the code may be stored in a non-transitory computer-readable medium such as the memory 1404 or another type of memory.
  • Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer.
  • the processor 1402 and the memory 1404 coupled with the processor 1402 may be configured to cause the communication device 1400 to perform one or more of the functions described herein (e.g., executing, by the processor 1402, instructions stored in the memory 1404).
  • the processor 1402 may support wireless communication at the communication device 1400 in accordance with examples as disclosed herein.
  • the communication device 1400 may be configured to or operable to support a means for receiving, from a second communication device, a resource allocation configuration to perform SL-PRS transmission over unlicensed carriers, the resource allocation configuration comprising at least RB sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs; and transmitting at least one SL-PRS to the second communication device over an unlicensed carrier based at least in part on the resource allocation configuration.
  • the communication device 1400 may be configured to support any one or combination of the method further comprising transmitting the at least one SL-PRS over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the method further comprising transmitting multiple SL-PRSs over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the method further comprising transmitting a resource allocation configuration request, and in response, receiving the resource allocation configuration.
  • the resource allocation configuration is pre-configured by at least one of the first communication device or the second communication device.
  • the first communication device is at least one of a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside unit.
  • the second communication device is at least one of a base station, a location server, a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside-unit.
  • the resource allocation configuration indicates a shared resource pool structure with at least one of RB sets defined for SL-PRS and associated sidelink control information, or the RB sets defined for sidelink data and the associated sidelink control information.
  • the resource allocation configuration indicates a shared resource pool structure with RB sets defined for SL-PRS, sidelink data, and associated sidelink control information.
  • the resource allocation configuration indicates a dedicated resource pool structure with RB sets defined for SL-PRS and associated sidelink control information.
  • the resource allocation configuration comprises at least one of a sidelink BWP, a sidelink positioning resource pool defined in terms of the RB sets, a SL-PRS bandwidth indication, or an indication of contiguous PRB resource allocation or interlaced PRS resource allocation.
  • a sidelink positioning RB set configuration comprises at least one of multiple SL-PRS resource IDs, SL-PRS resource set IDs, SL-PRS transmission-reception point IDs, SL-PRS comb offsets and associated SL-PRS comb sizes, SL-PRS starting symbols and a number of SL-PRS symbols, a number of subchannels, or a channel size.
  • a sidelink positioning RB set configuration comprises multiple interlaced transmissions for SL-PRS RB sets with a number of interlaces that are equally spaced according to a parameter that indicates the number of interlaces or RBs between each of the multiple interlaced RB transmissions.
  • the sidelink positioning RB set configuration is associated with different sidelink positioning transmitters differentiated by IDs comprising at least one of a source- ID, a session-ID, a destination-ID, a unique layer- 1 ID, or a unique layer-2 ID.
  • Signaling for the resource allocation configuration includes at least one of a lower-layer UE-specific signaling, a higher-layer UE-specific signaling, or broadcast signaling.
  • Intra-cell guard bands are configured for sidelink data or the SL-PRS transmission.
  • At least one of a transmit frequency hopping for SL-PRS or a receive frequency hopping for SL-PRS is enabled across the RB sets based at least in part on a received frequency hopping configuration comprising one or more sidelink positioning measurements corresponding to at least one of one or more hops, a time between the one or more hops, a same numerology and bandwidth among the one or more hops, a different numerology and bandwidth among the one or more hops, or a switching time between the one or more hops.
  • the communication device 1400 may support at least one memory and at least one processor coupled with the at least one memory and configured to cause the first communication device to: receive, from a second communication device, a resource allocation configuration to perform SL-PRS transmission over unlicensed carriers, the resource allocation configuration comprising at least RB sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs; and transmit at least one SL-PRS to the second communication device over an unlicensed carrier based at least in part on the resource allocation configuration.
  • the communication device 1400 may be configured to support any one or combination of the at least one processor is configured to cause the first communication device to transmit the at least one SL-PRS over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the at least one processor is configured to cause the first communication device to transmit the multiple SL-PRSs over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
  • the at least one processor is configured to cause the first communication device to transmit a resource allocation configuration request, and in response, receive the resource allocation configuration.
  • the resource allocation configuration is pre-configured by at least one of the first communication device or the second communication device.
  • the first communication device is at least one of a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside unit.
  • the second communication device is at least one of a base station, a location server, a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside-unit.
  • the resource allocation configuration indicates a shared resource pool structure with at least one of RB sets defined for SL-PRS and associated sidelink control information, or the RB sets defined for sidelink data and the associated sidelink control information.
  • the resource allocation configuration indicates a shared resource pool structure with RB sets defined for SL-PRS, sidelink data, and associated sidelink control information.
  • the resource allocation configuration indicates a dedicated resource pool structure with RB sets defined for SL-PRS and associated sidelink control information.
  • the resource allocation configuration comprises at least one of a sidelink BWP, a sidelink positioning resource pool defined in terms of the RB sets, a SL-PRS bandwidth indication, or an indication of contiguous PRB resource allocation or interlaced PRS resource allocation.
  • a sidelink positioning RB set configuration comprises at least one of multiple SL-PRS resource IDs, SL-PRS resource set IDs, SL-PRS transmission-reception point IDs, SL-PRS comb offsets and associated SL-PRS comb sizes, SL-PRS starting symbols and a number of SL-PRS symbols, a number of subchannels, or a channel size.
  • a sidelink positioning RB set configuration comprises multiple interlaced transmissions for SL-PRS RB sets with a number of interlaces that are equally spaced according to a parameter that indicates the number of interlaces or RBs between each of the multiple interlaced RB transmissions.
  • the sidelink positioning RB set configuration is associated with different sidelink positioning transmitters differentiated by IDs comprising at least one of a source-ID, a session-ID, a destination-ID, a unique layer- 1 ID, or a unique layer-2 ID.
  • Signaling for the resource allocation configuration includes at least one of a lower-layer UE-specific signaling, a higher-layer UE-specific signaling, or broadcast signaling.
  • Intra-cell guard bands are configured for sidelink data or the SL-PRS transmission.
  • At least one of a transmit frequency hopping for SL-PRS or a receive frequency hopping for SL-PRS is enabled across the RB sets based at least in part on a received frequency hopping configuration comprising one or more sidelink positioning measurements corresponding to at least one of one or more hops, a time between the one or more hops, a same numerology and bandwidth among the one or more hops, a different numerology and bandwidth among the one or more hops, or a switching time between the one or more hops.
  • the controller 1406 may manage input and output signals for the communication device 1400.
  • the controller 1406 may also manage peripherals not integrated into the communication device 1400.
  • the controller 1406 may utilize an operating system such as iOS®, ANDROID®, WINDOWS®, or other operating systems.
  • the controller 1406 may be implemented as part of the processor 1402.
  • the communication device 1400 may include at least one transceiver 1408. In some other implementations, the communication device 1400 may have more than one transceiver 1408.
  • the transceiver 1408 may represent a wireless transceiver.
  • the transceiver 1408 may include one or more receiver chains 1410, one or more transmitter chains 1412, or a combination thereof.
  • a receiver chain 1410 may be configured to receive signals (e.g., control information, data, packets) over a wireless medium.
  • the receiver chain 1410 may include one or more antennas to receive a signal over the air or wireless medium.
  • the receiver chain 1410 may include at least one amplifier (e.g., a low-noise amplifier (LNA)) configured to amplify the received signal.
  • the receiver chain 1410 may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal.
  • the receiver chain 1410 may include at least one decoder for decoding the demodulated signal to receive the transmitted data.
  • a transmitter chain 1412 may be configured to generate and transmit signals
  • the transmitter chain 1412 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium.
  • the at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM), frequency modulation (FM), or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM).
  • the transmitter chain 1412 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium.
  • the transmitter chain 1412 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.
  • Figure 15 illustrates a flowchart of a method 1500 in accordance with aspects of the present disclosure.
  • the operations of the method may be implemented by a UE as described herein.
  • the UE may execute a set of instructions to control the function elements of the UE to perform the described functions. It should be noted that the method described herein describes a possible implementation, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible.
  • the method may include receiving a resource allocation configuration to perform SL-PRS transmission over unlicensed carriers, the resource allocation configuration including at least RB sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs.
  • the operations of 1502 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1502 may be performed by a UE as described with reference to Figure 12.
  • the method may include transmitting at least one SL-PRS over an unlicensed carrier based at least in part on the resource allocation configuration.
  • the operations of 1504 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1504 may be performed by a UE as described with reference to Figure 12.
  • Figure 16 illustrates a flowchart of a method 1600 in accordance with aspects of the present disclosure.
  • the operations of the method may be implemented by a communication device as described herein.
  • the communication device may execute a set of instructions to control the function elements of the communication device to perform the described functions. It should be noted that the method described herein describes a possible implementation, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible.
  • the method may include receiving, from a second communication device, a resource allocation configuration to perform SL-PRS transmission over unlicensed carriers, the resource allocation configuration including at least RB sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs.
  • the operations of 1602 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1602 may be performed by a communication device as described with reference to Figure 14.

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Abstract

Divers aspects de la présente divulgation concernent la transmission de signal de référence de positionnement de liaison latérale sans licence et l'attribution de ressources. Un appareil, tel qu'un UE ou un autre dispositif de communication, reçoit une configuration d'attribution de ressources pour effectuer une transmission de signal de référence de positionnement de liaison latérale (SL-PRS) sur des porteuses sans licence. La configuration d'attribution de ressources peut comprendre au moins des ensembles de blocs de ressources (RB), des tailles de sous-canal, des numéros de sous-canal et des tailles de peigne de multiples SL-PRS. L'UE transmet au moins un SL-PRS sur une porteuse sans licence sur la base, au moins en partie, de la configuration d'attribution de ressources.
PCT/IB2024/058147 2023-08-21 2024-08-21 Transmission de signal de référence de positionnement de liaison latérale sans licence et attribution de ressources Pending WO2025041063A1 (fr)

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US202363520804P 2023-08-21 2023-08-21
US63/520,804 2023-08-21
US18/810,095 US20250070943A1 (en) 2023-08-21 2024-08-20 Unlicensed sidelink positioning reference signal transmission and resource allocation
US18/810,095 2024-08-20

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Citations (2)

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WO2023149989A1 (fr) * 2022-02-04 2023-08-10 Qualcomm Incorporated Signalisation et comportement d'ue pour une configuration drx de prs de liaison latérale dans un positionnement de liaison latérale nr
WO2023147849A1 (fr) * 2022-02-02 2023-08-10 Robert Bosch Gmbh Positionnement de liaison latérale dans une bande sans licence

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023147849A1 (fr) * 2022-02-02 2023-08-10 Robert Bosch Gmbh Positionnement de liaison latérale dans une bande sans licence
WO2023149989A1 (fr) * 2022-02-04 2023-08-10 Qualcomm Incorporated Signalisation et comportement d'ue pour une configuration drx de prs de liaison latérale dans un positionnement de liaison latérale nr

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