WO2025065629A1

WO2025065629A1 - Systems and methods for positioning enhancement

Info

Publication number: WO2025065629A1
Application number: PCT/CN2023/122922
Authority: WO
Inventors: Cong Wang; Chuangxin JIANG; Yu Pan; Mengzhen LI; Qi Yang; Rongwei SHI
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2023-09-28
Filing date: 2023-09-28
Publication date: 2025-04-03
Anticipated expiration: 2026-03-28

Abstract

A wireless communication method performed by a wireless communication entity includes receive priority information of one or more of a plurality of reference wireless communication devices surrounding a target wireless communication device. Wireless communication entity can be gNB, LMF or TRP, reference wireless communication device can be a PRU, or a UE with known location or fixed location or an anchor UE, a target wireless communication can be a UE. In some embodiments and claims, the measured TRP refers to the TRP that transmit PRS, and PRU/UE measures the transmitted PRS from that TRP.

Description

SYSTEMS AND METHODS FOR POSITIONING ENHANCEMENT

TECHNICAL FIELD

The disclosure relates generally to wireless communications, including but not limited to systems and methods for positioning.

BACKGROUND

The standardization organization Third Generation Partnership Project (3GPP) is currently in the process of specifying a new Radio Interface called 5G New Radio (5G NR) as well as a Next Generation Packet Core Network (NG-CN or NGC) . The 5G NR will have three main components: a 5G Access Network (5G-AN) , a 5G Core Network (5GC) , and a User Equipment (UE) . In order to facilitate the enablement of different data services and requirements, the elements of the 5GC, also called Network Functions, have been simplified with some of them being software based, and some being hardware based, so that they could be adapted according to need. In a positioning session or process, positioning reference unit (PRU, similar to a UE with known location or fixed location) can be required or involved to report the measurement results to a location server and/or a UE. The PRU measurements can be compared with the measurements expected at the known location to determine correction terms for other nearby target devices. In a positioning session, multiple PRUs can report their measurement results, and these reported measurement results can be used to calculate the location of the target UE. However, if LMF (Location Management Function) /UE calculate the location information using all reported results, the calculation complexity will be high. In this disclosure, we provide several solutions on how to select PRU and how to utilize PRUs’ measurement results for positioning purposes. A Positioning Reference Unit (PRU) at a known location can perform positioning measurements (e.g., RSTD, RSRP, UE Rx-Tx Time Difference measurements, etc. ) and report these measurements to a location server. In addition, the PRU can transmit SRS to enable TRPs (Transmission-Reception Point) to measure and report UL positioning measurements (e.g., RTOA, UL-AoA, gNB Rx-Tx Time Difference, etc. ) from PRU at a known location. The PRU measurements can be compared by a location server with the measurements expected at the known PRU location to determine correction terms for other nearby target devices. The DL-and/or UL location measurements for other target devices can then be corrected based on the previously determined correction terms. From a location server perspective, the PRU functionality is realized by a UE with known location.

SUMMARY

The example embodiments disclosed herein are directed to solving the issues relating to one or more of the problems presented in the prior art, as well as providing additional features that will become readily apparent by reference to the following detailed description when taken in conjunction with the accompany drawings. In accordance with various embodiments, example systems, methods, devices and computer program products are disclosed herein. It is understood, however, that these embodiments are presented by way of example and are not limiting, and it will be apparent to those of ordinary skill in the art who read the present disclosure that various modifications to the disclosed embodiments can be made while remaining within the scope of this disclosure.

At least one aspect of the present disclosure is directed to a system, method, or a computer-readable medium of the following. A wireless communication entity (e.g., UE, a radio device) that may receive assistance information for positioning. In some embodiments, the assistance information include priority information of one or more of a plurality of reference wireless communication devices surrounding a target wireless communication device. In some embodiments, the priority information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU ID, a UE ID, or a priority level of a corresponding one of the one or more reference wireless communication devices. In some embodiments, the priority information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU ID, a UE ID, a PRS resource ID, a PRS resource set ID, or a priority level of a corresponding one of the one or more reference wireless communication devices. In some embodiments, the priority information includes a list of the one or more reference wireless communication devices.

In some embodiments, the list includes at least one of: a PRU ID or a priority level of a corresponding one of the one or more reference wireless communication devices. In some embodiments, the list is included in a PRS resource set or a PRS resource configuration.

In some embodiments, the wireless communication entity may send, to another wireless communication entity, a list of the one or more reference wireless communication devices, where the list is included in a New Radio Positioning Protocol A (NRPPa) . In some embodiments, the list is associated with at least one of: a PRS resource set or a PRS resource configuration. In some embodiments the priority information includes one or more groups information of the one or more reference wireless communication devices.

In some embodiments, the group (s) information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU group, a UE ID, or a priority level of a corresponding one of the one or more reference wireless communication devices. In some embodiments, the group (s) information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU group, a UE ID, a PRS resource ID, a PRS resource set ID, or a priority level of a corresponding one of the one or more reference wireless communication devices.

In some embodiments, the wireless communication entity may receive a message requesting the priority information. In some embodiments, the request for priority information is included in Request Assistance Data. In some embodiments, the wireless communication entity may send, to another wireless communication entity, the priority information of one or more of a plurality of reference wireless communication devices surrounding a target wireless communication device. In some embodiments, the priority information is included in a New Radio Positioning Protocol A (NRPPa) .

At least one aspect of the present disclosure is directed to a system, method, or a computer-readable medium of the following. A wireless communication entity (e.g., UE, a radio device) that may report, measurement information to a wireless communication entity or the target wireless communication device. In some embodiments, the reference wireless communication entity may receive, by a target wireless communication device from a wireless communication entity, priority information of one or more of a plurality of reference wireless communication devices surrounding the target wireless communication device. In some embodiments, the measurement information includes at least one of: error information of RSTD, error information of carrier phase, error information of carrier phase difference. In some embodiments, the error information of RSTD includes at least one of: ID of the reference TRP, ID of the measured TRP, PRU ID, or error value of RSTD.

In some embodiments, the error information of carrier phase includes at least one of: ID of the measured TRP, PRU ID, or error value of carrier phase. In some embodiments, the error information of carrier phase difference includes at least one of: ID of the reference TRP, ID of the measured TRP, PRU ID, or error value of carrier phase difference. In some embodiments, the priority information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU ID, a UE ID, or a priority level of a corresponding one of the one or more reference wireless communication devices. In some embodiments, the priority information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU ID, a UE ID, a PRS resource ID, a PRS resource set ID, or a priority level of a corresponding one of the one or more reference wireless communication devices.

In some embodiments, the priority information includes one or more groups of the one or more reference wireless communication devices. In some embodiments, the priority information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU group, a UE ID, or a priority level of a corresponding one of the one or more reference wireless communication devices. In some embodiments, the priority information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU group, a UE ID, a PRS resource ID, a PRS resource set ID, or a priority level of a corresponding one of the one or more reference wireless communication devices.

In some embodiments, the wireless communication entity may send, by the target wireless communication device to the wireless communication entity, a message requesting the priority information. In some embodiments, the priority information is included in Request Assistance Data. The wireless communication entity may receive, by the target wireless communication device from the wireless communication entity or the one or more reference wireless communication devices, PRS configuration information of the one or more reference wireless communication devices. In some embodiments, the PRS configuration information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU ID, NR-DL-PRS-Info of a reference TRP, or NR-DL-PRS-Info of a measured TRP associated with a corresponding one of the one or more reference wireless communication devices.

In some embodiments, the wireless communication entity may receive, by the target wireless communication device from the wireless communication entity or the one or more reference wireless communication devices, PRS transmission information related to measurement results of the one or more reference wireless communication devices. In some embodiments, the PRS transmission information comprises a plurality of information elements, each of the information elements includes at least one of: beam information of a measured PRS instance, timing information of the measured PRS instance, or location information of a TRP that transmits the measured PRS instance. In some embodiments, the beam information of the measured PRS instance includes an ID of a PRS resource and DL-PRS-BeamInfoElement of the PRS resource.

In some embodiments, the wireless communication entity may receive, by the target wireless communication device from the wireless communication entity, one or more common PRS configuration IDs. In some embodiments, the common PRS configuration IDs each comprise a plurality of information elements, each of the information elements includes at least one of: a PRS resource ID, a PRS resource set ID, a TRP ID, or a PRU ID. In some embodiments, the wireless communication entity may receive, by the target wireless communication device, an indication associating a first PRS configuration for the one or more reference wireless communication devices and a second PRS configuration for the target wireless communication device.

In some embodiments, the indication comprises a plurality of information elements, each of the information elements includes at least one of: an ID set of PRU, an ID set of UE, or an association indication. In some embodiments, the wireless communication entity may receive, by the target wireless communication device from the wireless communication entity or the one or more reference wireless communication devices, a measured PRS resource ID together with a corresponding measurement result. Furthermore, the wireless communication entity may report, by the target wireless communication device, its capability on a supported maximum number of measurement windows and send, by a wireless communication entity, the TRP location information to a reference wireless communication device.

In some embodiments, the TRP location information includes at least one of: NR-TRP-LocationInfo, NR-RTD-Info, or NR-DL-PRS-TEG-Info. In some embodiments, the wireless communication entity may report, by the reference wireless communication device, error information to the wireless communication entity or a target wireless communication device. In some embodiments, the error information includes at least one of: error information of RSTD, error information of carrier phase, error information of carrier phase difference. In some embodiments, the error information of RSTD includes at least one of: ID of the reference TRP, ID of the measured TRP, PRU ID, or error value of RSTD. In some embodiments, the error information of carrier phase includes at least one of: ID of the measured TRP, PRU ID, or error value of carrier phase. In some embodiments, the error information of carrier phase difference includes at least one of: ID of the reference TRP, ID of the measured TRP, PRU ID, or error value of carrier phase difference.

At least one aspect of the present disclosure is directed to a system, method, or a computer-readable medium of the following. A wireless communication entity (e.g., UE, a radio device) that may receive, by a wireless communication device, assistance information from a wireless communication entity. In some embodiments, the assistance information includes priority information of anchor UEs, wherein the priority information includes at least one of: candidate anchor UE ID, target UE ID, priority level or indicator.

In some embodiments, the priority information of anchor UEs includes at least one of: candidate anchor UE ID, target UE ID, priority level or indicator, SL-PRS configuration of the candidate anchor UE, SL-PRS beam information of the candidate anchor UE, SL-PRS configuration of the target UE, SL-PRS beam information of the target UE. In some embodiments, the priority information can be included in a SL-PRS configuration. In some embodiments, the priority information comprises a plurality of information elements, each of the information elements includes at least one of: candidate anchor UE ID list, a UE ID, or a priority level of a corresponding one of the one or more reference wireless communication devices.

In some embodiments, the wireless communication entity may determine, by a wireless communication device, a measurement period requirement. In some embodiments, the wireless communication device is configured to measure reference signal for positioning within the period. In some embodiments, the measurement period requirement for bandwidth aggregation PRS measurement for 2 PFLs (PFL i and PFL j) is defined as

the measurement period requirement for bandwidth aggregation PRS measurement for 3 PFLs (PFL i, PFL j and PFL k) is defined as

In some embodiments, T_{effect, i, j} is the periodicity of the PRS measurement in PFL i and PFL j: In some embodiments, T_i, j corresponds to DL PRS processing capabilities for aggregated PRS processing of 2 PFLs in intra-band contiguous within a MG a MG for RRC_CONNECTED or RRC_IDLE or RRC_INACTIVE state. T_{available_PRS, i, j}= LCM (T_PRS, i, j, MGRP_i, j) is the least common multiple between T_PRS, i, j and MGRP_i, j. MGRP_i, j is the repetition periodicity of the measurement gap applicable for measurement in the PRS frequency layer i or j. T_PRS, i, jis the periodicity of DL PRS resource with muting of aggregated resource sets in positioning frequency layer i and j, wherein T_{effect, i, j,} _k is the periodicity of the PRS measurement in PFL i, PFL j and PFL k: wherein T_i, j, k corresponds to DL PRS processing capabilities for aggregated PRS processing of 3 PFLs in intra-band contiguous within a MG for RRC_CONNECTED or RRC_IDLE or RRC_INACTIVE state. T_{available_PRS, i, j, k}= LCM (T_{PRS, i, j, k}, MGRP_i, j, k) , the least common multiple between T_{PRS, i, j, k} and MGRP_i, j, k. MGRP_i, j, k is the repetition periodicity of the measurement gap applicable for measurement in the PRS frequency layer i or j or k. T_{PRS, i, j, k} is the periodicity of DL PRS resource with muting of aggregated resource sets in positioning frequency layer i, j and k, and the aggregated resource sets in PFL i, PFL j and PFL k have the same periodicity and muting pattern.

In some embodiments, bandwidth aggregation PRS measurement , {N, T} is UE capability combination where N is a duration of DL PRS symbols in ms corresponding to durationOfPRS-ProcessingSysmbols processed every T ms corresponding to durationOfPRS-ProcessingSymbolsInEveryTms defined in DL PRS processing capabilities for aggregated PRS processing of 2 PFLs in intra-band contiguous within a MG for RRC_CONNECTED or RRC_IDLE or RRC_INACTIVE state. For 3 PFL bandwidth aggregation PRS measurement, {N, T} is UE capability combination where N is a duration of DL PRS symbols in ms corresponding to durationOfPRS-ProcessingSysmbols processed every T ms corresponding to durationOfPRS-ProcessingSymbolsInEveryTms defined in DL PRS processing capabilities for aggregated PRS processing of 3 PFLs in intra-band contiguous within a MG for RRC_CONNECTED or RRC_IDLE or RRC_INACTIVE state.

In some embodiments, the wireless communication entity may send, by the wireless communication entity to another wireless communication entity, a configuration information. In some embodiments, the configuration information is a configuration of a window for intermittent monitor, wherein the configuration includes at least one of: start time of monitor window, the duration of the monitor window, the periodicity of the monitor window.

In some embodiments, the wireless communication device may request the configuration information of reference wireless communication device.

In some embodiments, the configuration information may include the PRS configuration of reference wireless communication device.

In some embodiments, the configuration information may include the PRS configuration of reference wireless communication device that related to the measurement result.

In some embodiments, the configuration information may include the association information of the PRS configuration for the wireless communication device and the reference wireless communication device.

At least one aspect of the present disclosure is directed to a system, method, or a computer-readable medium of the following. A wireless communications apparatus comprising a processor and a memory, wherein the processor is configured to read code from the memory and implement methods disclosed herein. A computer program product comprising a computer-readable program medium code stored thereupon, the code, when executed by a processor, causing the processor to implement methods disclosed herein.

BRIEF DESCRIPTION OF THE DRAWINGS

Various example embodiments of the present solution are described in detail below with reference to the following figures or drawings. The drawings are provided for purposes of illustration only and merely depict example embodiments of the present solution to facilitate the reader's understanding of the present solution. Therefore, the drawings cannot be considered limiting of the breadth, scope, or applicability of the present solution. It can be noted that for clarity and ease of illustration, these drawings are not necessarily drawn to scale.

FIG. 1 illustrates an example cellular communication network in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure;

FIG. 2 illustrates a block diagram of an example base station and a user equipment device, in accordance with some embodiments of the present disclosure;

FIG. 3 illustrates an example positioning process to provide a location estimate for a target UE in accordance with some embodiments of the present disclosure;

FIG. 4 illustrates an example positioning process where a TRP transmits multiple PRS resources, in accordance with some embodiments of the present disclosure;

FIG. 5 illustrates an example positioning process where a PRU may receive and measure multiple PRS resource, in accordance with some embodiments of the present disclosure;

FIG. 6 illustrates an example positioning process where the PRU is aware of the TRP coordinates, in accordance with some embodiments of the present disclosure;

FIG. 7 illustrates an example positioning process where the TRP monitors SRS within a monitor window, in accordance with some embodiments of the present disclosure;

FIG. 8 illustrates a bandwidth aggregation example, in accordance with some embodiments of the present disclosure;

FIG. 9 illustrates another bandwidth aggregation example, in accordance with some embodiments of the present disclosure;

FIG. 10 illustrates another bandwidth aggregation example, in accordance with some embodiments of the present disclosure;

FIG. 11 illustrates a bandwidth non-aggregation example, in accordance with some embodiments of the present disclosure;

FIG. 12 illustrates another bandwidth non-aggregation example, in accordance with some embodiments of the present disclosure;

FIG. 13 illustrates an example positioning process where a PRS sample is group based on if the resources are aggregated or non-aggregated, in accordance with some embodiments of the present disclosure;

FIG. 14 illustrates a PRS reception and measurement timeline, in accordance with some embodiments of the present disclosure;

FIG. 15 illustrates an example positioning process where candidate anchor UE is associated with a SL-PRS configuration, in accordance with some embodiments of the present disclosure;

FIG. 16 illustrates an example positioning process where the target UE transmits PRS resources to the candidate anchor UE, in accordance with some embodiments of the present disclosure.

DETAILED DESCRIPTION

1. Mobile Communication Technology and Environment

FIG. 1 illustrates an example wireless communication network, and/or system, 100 in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure. In the following discussion, the wireless communication network 100 may be any wireless network, such as a cellular network or a narrowband Internet of things (NB-IoT) network and is herein referred to as “network 100. ” Such an example network 100 includes a base station 102 (hereinafter “BS 102” ; also referred to as wireless communication node) and a user equipment device 104 (hereinafter “UE 104” ; also referred to as wireless communication device) that can communicate with each other via a communication link 110 (e.g., a wireless communication channel) , and a cluster of cells 126, 130, 132, 134, 136, 138 and 140 overlaying a geographical area 101. In FIG. 1, the BS 102 and UE 104 are contained within a respective geographic boundary of cell 126. Each of the other cells 130, 132, 134, 136, 138 and 140 may include at least one base station operating at its allocated bandwidth to provide adequate radio coverage to its intended users.

For example, the BS 102 may operate at an allocated channel transmission bandwidth to provide adequate coverage to the UE 104. The BS 102 and the UE 104 may communicate via a downlink radio frame 118, and an uplink radio frame 124 respectively. Each radio frame 118/124 may be further divided into sub-frames 120/127 which may include data symbols 122/128. In the present disclosure, the BS 102 and UE 104 are described herein as non-limiting examples of “communication nodes, ” generally, which can practice the methods disclosed herein. Such communication nodes may be capable of wireless and/or wired communications, in accordance with various embodiments of the present solution.

FIG. 2 illustrates a block diagram of an example wireless communication system 200 for transmitting and receiving wireless communication signals (e.g., OFDM/OFDMA signals) in accordance with some embodiments of the present solution. The system 200 may include components and elements configured to support known or conventional operating features that need not be described in detail herein. In one illustrative embodiment, system 200 can be used to communicate (e.g., transmit and receive) data symbols in a wireless communication environment such as the wireless communication environment 100 of FIG. 1, as described above.

System 200 generally includes a base station 202 (hereinafter “BS 202” ) and a user equipment device 204 (hereinafter “UE 204” ) . The BS 202 includes a BS (base station) transceiver module 210, a BS antenna 212, a BS processor module 214, a BS memory module 216, and a network communication module 218, each module being coupled and interconnected with one another as necessary via a data communication bus 220. The UE 204 includes a UE (user equipment) transceiver module 230, a UE antenna 232, a UE memory module 234, and a UE processor module 236, each module being coupled and interconnected with one another as necessary via a data communication bus 240. The BS 202 communicates with the UE 204 via a communication channel 250, which can be any wireless channel or other medium suitable for transmission of data as described herein.

As would be understood by persons of ordinary skill in the art, system 200 may further include any number of modules other than the modules shown in FIG. 2. Those skilled in the art will understand that the various illustrative blocks, modules, circuits, and processing logic described in connection with the embodiments disclosed herein may be implemented in hardware, computer-readable software, firmware, or any practical combination thereof. To clearly illustrate this interchangeability and compatibility of hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps are described generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software can depend upon the particular application and design constraints imposed on the overall system. Those familiar with the concepts described herein may implement such functionality in a suitable manner for each particular application, but such implementation decisions cannot be interpreted as limiting the scope of the present disclosure.

In accordance with some embodiments, the UE transceiver 230 may be referred to herein as an "uplink" transceiver 230 that includes a radio frequency (RF) transmitter and a RF receiver each comprising circuitry that is coupled to the antenna 232. A duplex switch (not shown) may alternatively couple the uplink transmitter or receiver to the uplink antenna in time duplex fashion. Similarly, in accordance with some embodiments, the BS transceiver 210 may be referred to herein as a "downlink" transceiver 210 that includes a RF transmitter and a RF receiver each comprising circuity that is coupled to the antenna 212. A downlink duplex switch may alternatively couple the downlink transmitter or receiver to the downlink antenna 212 in time duplex fashion. The operations of the two transceiver modules 210 and 230 may be coordinated in time such that the uplink receiver circuitry is coupled to the uplink antenna 232 for reception of transmissions over the wireless transmission link 250 at the same time that the downlink transmitter is coupled to the downlink antenna 212. Conversely, the operations of the two transceivers 210 and 230 may be coordinated in time such that the downlink receiver is coupled to the downlink antenna 212 for reception of transmissions over the wireless transmission link 250 at the same time that the uplink transmitter is coupled to the uplink antenna 232. In some embodiments, there is close time synchronization with a minimal guard time between changes in duplex direction.

The UE transceiver 230 and the base station transceiver 210 are configured to communicate via the wireless data communication link 250 and cooperate with a suitably configured RF antenna arrangement 212/232 that can support a particular wireless communication protocol and modulation scheme. In some illustrative embodiments, the UE transceiver 210 and the base station transceiver 210 are configured to support industry standards such as the Long-Term Evolution (LTE) and emerging 5G standards, and the like. It is understood, however, that the present disclosure is not necessarily limited in application to a particular standard and associated protocols. Rather, the UE transceiver 230 and the base station transceiver 210 may be configured to support alternate, or additional, wireless data communication protocols, including future standards or variations thereof.

In accordance with various embodiments, the BS 202 may be an evolved node B (eNB) , a serving eNB, a target eNB, a femto station, or a pico station, for example. In some embodiments, the UE 204 may be embodied in various types of user devices such as a mobile phone, a smart phone, a personal digital assistant (PDA) , tablet, laptop computer, wearable computing device, etc. The processor modules 214 and 236 may be implemented, or realized, with a general-purpose processor, a content addressable memory, a digital signal processor, an application specific integrated circuit, a field programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. In this manner, a processor may be realized as a microprocessor, a controller, a microcontroller, a state machine, or the like. A processor may also be implemented as a combination of computing devices, e.g., a combination of a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other such configuration.

Furthermore, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in firmware, in a software module executed by processor modules 214 and 236, respectively, or in any practical combination thereof. The memory modules 216 and 234 may be realized as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. In this regard, memory modules 216 and 234 may be coupled to the processor modules 210 and 230, respectively, such that the processors modules 210 and 230 can read information from, and write information to, memory modules 216 and 234, respectively. The memory modules 216 and 234 may also be integrated into their respective processor modules 210 and 230. In some embodiments, the memory modules 216 and 234 may each include a cache memory for storing temporary variables or other intermediate information during execution of instructions to be executed by processor modules 210 and 230, respectively. Memory modules 216 and 234 may also each include non-volatile memory for storing instructions to be executed by the processor modules 210 and 230, respectively.

The network communication module 218 generally represents the hardware, software, firmware, processing logic, and/or other components of the base station 202 that enable bi-directional communication between base station transceiver 210 and other network components and communication nodes configured to communication with the base station 202. For example, network communication module 218 may be configured to support internet or WiMAX traffic. In a typical deployment, without limitation, network communication module 218 provides an 802.3 Ethernet interface such that base station transceiver 210 can communicate with a conventional Ethernet based computer network. In this manner, the network communication module 218 may include a physical interface for connection to the computer network (e.g., Mobile Switching Center (MSC) ) . The terms “configured for, ” “configured to” and conjugations thereof, as used herein with respect to a specified operation or function, refer to a device, component, circuit, structure, machine, signal, etc., that is physically constructed, programmed, formatted and/or arranged to perform the specified operation or function.

The Open Systems Interconnection (OSI) Model (referred to herein as, “open system interconnection model” ) is a conceptual and logical layout that defines network communication used by systems (e.g., wireless communication device, wireless communication node) open to interconnection and communication with other systems. The model is broken into seven subcomponents, or layers, each of which represents a conceptual collection of services provided to the layers above and below it. The OSI Model also defines a logical network and effectively describes computer packet transfer by using different layer protocols. The OSI Model may also be referred to as the seven-layer OSI Model or the seven-layer model. In some embodiments, a first layer may be a physical layer. In some embodiments, a second layer may be a Medium Access Control (MAC) layer. In some embodiments, a third layer may be a Radio Link Control (RLC) layer. In some embodiments, a fourth layer may be a Packet Data Convergence Protocol (PDCP) layer. In some embodiments, a fifth layer may be a Radio Resource Control (RRC) layer. In some embodiments, a sixth layer may be a Non-Access Stratum (NAS) layer or an Internet Protocol (IP) layer, and the seventh layer being the other layer.

Various example embodiments of the present solution are described below with reference to the accompanying figures to enable a person of ordinary skill in the art to make and use the present solution. As would be apparent to those of ordinary skill in the art, after reading the present disclosure, various changes or modifications to the examples described herein can be made without departing from the scope of the present solution. Thus, the present solution is not limited to the example embodiments and applications described and illustrated herein. Additionally, the specific order or hierarchy of steps in the methods disclosed herein are merely example approaches. Based upon design preferences, the specific order or hierarchy of steps of the disclosed methods or processes can be re-arranged while remaining within the scope of the present solution. Thus, those of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or acts in a sample order, and the present solution is not limited to the specific order or hierarchy presented unless expressly stated otherwise.

Systems and methods for positioning enhancement

Embodiment 1: PRU priority indication

In a positioning process, if the location of PRU is close to a target device, the measurement results reported by the PRU can provide more precise corrections for the location estimation of the target device. For example, depicted in FIG. 3, there are several PRUs scattered in an area, where PRU 5 is the closest PRU to the target UE. Compared to PRU 3 (PRU farthest from the target UE) , PRU 5 may provide more precise corrections for the target UE. If the difference of D_PRU5 (distance between TRP and PRU5) and D_UE (distance between TRP and the target UE) are smaller, PRU 5 and UE may share similar error information with the target UE. Furthermore, LMF and/or gNB may provide the priority information of different PRU for the positioning of target UE or PRU, indicating the importance and the reference value of the measurement result (s) reported by the PRU. The priority information may include one or more IEs (information elements) such as PRU ID, UE ID, or Priority level indicator, among others.

When the PRU receives the priority information, if the priority level or indicator is lower than a threshold, the PRU can determine whether or not to report the measurement result (s) . Alternatively, the above priority information of different PRU (for the positioning purpose of the target UE) can be reported by the PRU and/or the target UE to the LMF and/or gNB. If reported by the PRU, the priority information may include one or more IEs such as UE ID or priority level or indicator. If reported by a UE, the priority information may include one or more IEs such as PRU ID and Priority level or indicator.

Embodiment 2: PRU priority indication associate with PRS resource/PRS resource set configuration

In current positioning process, there might be unexpected errors (e.g., timing error, ARP error, phase error, etc. ) on TRP transmitting antenna. For a TRP, if this unexpected error corresponding to the same beam set remains unchanged, the explicit errors can be evaluated with the help of PRU. Depicted in FIG. 4, there are several PRUs scattered in an area, and a TRP/gNB can transmit multiple PRS resources during the positioning process. For example, the PRUs that are located in the similar PRS (positioning reference signal) transmission beam or direction with the target UE may share the similar positioning errors with the target UE. LMF and/or gNB may provide the priority information of different PRUs for the positioning of the target UE associate with PRS resource set (s) and/or PRS resource (s) . The priority information may include one or more information elements: PRU ID, UE ID, PRS resource set ID (s) , PRS resource ID (s) , and a Priority level indicator.

Alternatively, the above priority information of different PRUs (for the positioning purpose of the target UE) can be reported by the PRU and/or the target UE to the LMF and/or gNB. Alternatively, if the priority of different PRUs for the positioning of target UE is associated with PRS resource set (s) and/or PRS resource (s) , the priority information can be embedded/included in the PRS resource set or PRS resource configuration in LPP (LTE positioning protocol) . Alternatively, the LMF/gNB can provide the above PRU priority information to gNB/LMF, where the priority information can be included in NRPPa (NR Positioning Protocol A) . Moreover, if provided by LMF, the PRU priority information can be included in Requested DL PRS Transmission Characteristics; if provided by the gNB, the PRU priority information can be included in RRC signal (to UE) or PRS Configuration (to LMF) .

Embodiment 3: PRU priority information: PRU List recommendation

In some cases, LMF and/or gNB can recommend a list of PRU (s) to the target UE, indicating that the measurement result (s) of these PRU in the list can be used to calibrate the unexpected errors, the list can be: PRU ID 1 (Priority level or indicator for PRU ID 1) , PRU ID 2 (Priority level or indicator for PRU ID 2) , …, PRU ID N (Priority level or indicator for PRU ID N) .

Alternatively, if the recommended list of PRU for the positioning of target UE is associated with PRS resource set (s) and/or PRS resource (s) , the recommended list of PRU can be include in the PRS resource set or PRS resource configuration in LPP, where PRU-List includes a list of PRU ID and optionally, the priority level or indicator of the corresponding PRU ID. If the list of PRU ID doesn’ t contains the priority level or indicator information, PRUs in the list are arranged in priority descending/ascending order.

Alternatively, the LMF/gNB can provide the above recommended list of PRU (s) to gNB/LMF, where the priority information can be included in NRPPa. The recommended PRU list can be associated with the PRS resource set and/or PRS resource configuration. Moreover, if provided by LMF, the recommended list can be included in Requested DL PRS Transmission Characteristics; if provided by the gNB, the recommended list can be included in RRC signal (to UE) or PRS Configuration (to LMF) .

Embodiment 4: PRU priority information: PRU List/PRS resource set indication

PRUs located in a certain area can be divided into several groups and the PRUs within a group may share the same/similar location information, channel condition, beam measurement characteristic, and/or same/similar priority level for a target UE. LMF and/or gNB may provide the priority information of a group of or several groups of PRUs for the positioning of target UE, the priority information may include one or more IEs: PRU group (s) , UE ID, and Priority level or indicator. Alternatively, the above priority information of a group of or several groups of PRUs (for the positioning purpose of the target UE) can also be reported by the UE to the LMF and/or gNB. The priority information may include one or more PRU group (s) or Priority level or indicator, where the PRU group include one or several PRU ID (s) that share the same/similar location information, channel condition, beam measurement characteristic, and/or same/similar priority level for a target UE.

For example, a group or several groups may share the same/similar priority information associate with one or more groups of PRS resource (s) /PRS resource set (s) . LMF and/or gNB may provide the priority information of a group of or several groups of PRUs for the positioning purpose of the target UE associate with one or more groups of PRS resource (s) /PRS resource set (s) , the priority information may include one or more PRU group (s) , PRS resource group (s) , PRS resource set group (s) , UE ID, or Priority level or indicator. Alternatively, the priority information of a group of or several groups of PRUs (for the positioning purpose of the target UE) associate with one or more groups of PRS resource (s) /PRS resource set (s) can be reported by the UE to the LMF and/or gNB. The priority information may include one or more PRU group (s) , PRS resource group (s) , PRS resource set group (s) , or Priority level or indicator. For ease of description, the PRS resource/PRS resource set group contains one or several PRS resource (s) /PRS resource set (s) that share the same/similar beam information, transmission information, and/or the PRU group (s) associate with the indicated PRS resource/PRS resource set group (s) share the same/similar priority level for a target UE.

If provided by LMF, in some embodiments, the priority information can be included in LPP (LTE Positioning Protocol) and in ProvideAssistanceData. The UE may send a request, i.e., PRU-Priority-RequestAssistanceData to request the above priority information, and the priority information request is included in Request Assistance Data. If provided by gNB, the priority information can be included in RRC message. Furthermore, the LMF/gNB can provide the above priority information to gNB/LMF, where the priority information can be included in NRPPa. If the priority information is reported to LMF by the target UE or PRU, the mentioned IEs can be included in the LPP and included in ProvideLocationInformation.

For UE-based positioning, the priority information can be provided by the PRU to the target UE. Alternatively, the PRU can report the priority information to LMF, and then LMF can forward the priority information to the target UE. The PRU ID IE can be used to identify a unique PRU, a PRU can be a UE with known location information. The UE ID can be used to identify a unique UE and the UE ID refers to the ID of the target UE. The priority level or indicator specifies the importance, or the reference value of the measurement result (s) reported by the PRU (for the positioning purpose of the target UE) . The IE type and reference can be INTEGER (L, ..., U) . The lower bound and upper bound of the priority level or indicator are L and U, where L may represent the highest priority and U may represent the lowest priority. The priority level or indicator can be associated with or determined by one or more of the (estimated) distance between PRU and target UE, the positional relationship between PRU and UE, the (estimated) channel environment, or the (estimated) beam information of the reference signal.

In some embodiments, the calculation results of PRU can be reasonably utilized by UE (for UE-based positioning method) or LMF (for LMF-based positioning method) to calculate the location information of the target UE with priority information or PRU list being informed. In some embodiments, the measurement results reported by the PRU can provide more precise corrections for the location estimation of the target device. Therefore, the positioning accuracy can be improved with the above enhancements.

Embodiment 5: Let UE know the PRS configuration of PRU

In UE-based positioning process, if PRU is involved, the PRU can report its measurement result (s) to the UE (or the LMF may help PRU to forward the measurement result) , and then the UE can calculate the location information based on the measurement results (s) reported by the PRU and the UE’s own measurement result (s) . Referring to FIG. 5, the PRU may receive and measure multiple PRS resources, but the UE may be unaware of the PRU’s measurement details if the PRS is configured per UE (e.g., the PRS configuration for different UEs are different) . To utilize the measurement result (s) of PRU for positioning purpose, the UE can request for the PRS configuration that PRU measured.

A measurement report may contain the measurement result together with the dl-PRS-ID, nr-DL-PRS-ResourceID, and nr-DL-PRS-ResourceSetID. The UE can be unaware of the PRS configuration of the PRU, and the measurement result (s) reported by the PRU can not be used because UE doesn’ t know the transmission information. Considering the limitation, gNB/LMF or the PRU can send the PRS configuration information of PRU to the UE (especially when UE and PRS share different PRS configuration) , where the PRS configuration information may include one or more PRU ID, NR-DL-PRS-Info of the reference TRP, or NR-DL-PRS-Info of the measured TRP, where the NR-DL-PRS-Info of the reference TRP indicates the PRS configuration of the reference TRP, whose ID information is indicated in dl-PRS-ReferenceInfo. And the NR-DL-PRS-Info of the measured TRP indicates the PRS configuration of the measured TRP, whose ID information is indicated in MeasElement.

Alternatively, if LMF/gNB is aware that the UE and PRU are required to perform measurement in a positioning process, LMF/gNB can broadcast the PRS configuration. For example, the UE and PRU can share the same PRS configuration. The PRU can report the PRS measurement result together with the dl-PRS-ID, nr-DL-PRS-ResourceID and nr-DL-PRS-ResourceSetID, where UE is aware of the PRS configuration details of PRU.

Embodiment 6: Let UE know the PRS configuration of PRU that related to the PRS transmission

In a UE-based positioning process, the UE can get the PRS information that related to the PRUs’ measurement result (s) . For example, the beam direction, timing information, the location of PRU, the location of TRP can be reported/send to the UE. Other configuration information (e.g., comb offset, periodicity and slot offset, muting pattern) are not related to the measurement result. Therefore, the PRU/LMF/gNB can send the PRS transmission information that related to the PRUs’ measurement result to the UE, where the PRS transmission information may include one or more of: beam information of the measured PRS instance (s) , timing information of the measured PRS instance (s) , or the location information of TRP that transmit the measured PRS instance (s) . Wherein the beam information refers to the spatial direction information of the measured DL-PRS Resource (s) . The BeamInfoElement of the PRS resource can include the PRS resource ID and a DL-PRS-BeamInfoElement of the PRS resource. The location information refers to the coordinates of TRPs and coordinates of the antenna reference points for a set of TRPs that related to the measured PRS resource (s) , i.e., NR-TRP-LocationInfo.

Embodiment 7: Let UE know the PRS association relation between UE and PRU

LMF/gNB may configure PRS for PRU and UE respectively, some PRS configuration can be the same for PRU and UE. In this case, LMF/gNB can send the common PRS configuration ID (s) to the UE, where the common PRS configuration ID (s) include one or more of: the PRS resource ID, the PRS resource set ID, the dl-PRS-ID (TRP ID) , the PRU ID.

Alternatively, there may be an association relation between PRS configuration for PRU and PRS configuration for UE. In some embodiments, the dl-PRS-ID can be used with a DL-PRS Resource Set ID and a DL-PRS Resource ID to identify a DL-PRS Resource. If the ID set 1 of PRU share a similar PRS configuration with ID set 2 of the UE, the UE can obtain the PRS configuration of the PRU with the association indication. The association indication can include: an ID set of PRU, ID set of UE or an association indication. For ease of description, the ID set of PRU (e.g., PRU ID) and the ID set of UE (e.g., UE ID) can be the dl-PRS-ID, DL-PRS Resource Set ID, or the DL-PRS Resource ID. The association indication can indicate the relation between the ID set of PRU and ID set of UE (referred to as the sets in some embodiments) . The sets may have the similar configuration, or the sets share the same transmission features (e.g., the features that affects the measurement results are the same) . The transmission features may include beam information, timing information and location information of TRP.

If provided by LMF, a common PRS configuration and/or association relation can be included in LPP and ProvideAssistanceData. For example, the UE may send a request (e.g., RequestAssistanceData to request for the common PRS configuration and/or association relation) . The common PRS configuration and/or association relation can be included in Request Assistance Data. If provided by gNB, the common PRS configuration and/or association relation can be included in RRC message.

Embodiment 8: Enable UE and PRU measure the same PRS resource in the measurement window

In Rel-18, LMF is enabled to request the UEs, including target UE and PRU (s) , to perform measurements on indicated DL PRS resource set (s) occurring within time window (s) . The PRU and UE may measure the PRS instance (s) from different PRS resources. For UE-based positioning, PRU can report the measured PRS resource ID together with the measurement results to the UE, or LMF help PRU forward the measured PRS resource ID together with the measurement results to the UE. Moreover, the UE can be aware of the measured PRS configuration of the measurement result (s) . A UE/PRU can report its capability on supported maximum number of measurement windows to be configured. For example, a UE support N measurement windows, a PRU support M measurement windows, then LMF can configure min {N, M} windows for UE and PRU.

In some embodiments, for UE-based positioning process, the UE can be aware of the configuration details or features (related to the measurement result) of the measured PRS resource towards the reported PRU. Moreover, PRU-assisted positioning procedure can be achieved, and the positioning accuracy can be improved. Embodiment 9: PRU report the error information to UE and/or LMF

In a positioning process, a PRU can be aware of the location information of TRP. Depicted in FIG. 6, the coordinate of PRU is (x, y) , the coordinate of TRP 1 (reference TRP) is (x₁, y₁) and the coordinate of TRP 2 is (x₂, y₂) is shown. The gNB/LMF can send the TRP location information to PRU, where the TRP location information include one or more of: NR-TRP-LocationInfo, NR-RTD-Info, NR-DL-PRS-TRP-TEG-Info. For ease of description, the NR-TRP-LocationInfo provides the location coordinates of the TRPs and location coordinates of antenna reference points for DL-PRS Resource Set (s) and DL-PRS Resources of the TRPs. The IE NR-RTD-Info provides the time synchronization information between a reference TRP and neighbor TRPs. The NR-DL-PRS-TRP-TEG-Info provides the TRP Tx TEG ID associated with the transmission of each DL-PRS Resource of the TRP.

For RSTD measurement, PRU can calculate the distance difference of different TRPs. Based on the distance difference, PRU can calculate the expected RSTD considering the NR-RTD-Info and NR-DL-PRS-TRP-TEG-Info. During the positioning process, PRU can measure the RSTD, and the difference between the measured RSTD and expected RSTD is the unexpected error for RSTD. Then PRU can report the calculated error information of RSTD to UE and/or LMF. For ease of description, the error information can include one or more of : the ID of the reference TRP, the ID of the measured TRP, the PRU ID, Error value. For example, the reported error information can be: TRP ID 1, TRP ID 2, PRU ID, or ΔT_RSTD. For ease of description, the error value ΔT_RSTD indicates the RSTD error of TRP 1 and TRP 2.

For carrier phase measurement, PRU can calculate the expected phase of the received signal. And the difference between expected phase and measured phase of the received signal is regarded as the phase error. The PRU can report the calculated error information of carrier phase to UE and/or LMF, where the error information can include one or more of: ID of TRP, PRU ID, Error value. For ease of description, the error value for carrier phase can indicate the phase error between TRP and PRU. For carrier phase difference measurement, PRU can calculate the expected phase difference of the received PRS transmitted from two TRPs. The difference between expected phase difference and measured phase difference can be the phase error. The PRU can report the calculated error information of carrier phase difference to UE and/or LMF. For ease of description, the error information can include one or more of: the ID of the reference TRP, ID of the measured TRP, PRU ID, or Error value. For ease of description, the error value for carrier phase difference indicates the phase difference error between the reference TRP and the measured TRP.

In this embodiment, LMF or UE can calculate the location of the target UE considering the error information and the positioning accuracy can be improved.

Embodiment 10: Relax the measurement of TRP

In Rel-18, for spatial relation of an SRS for positioning configuration in multiple cells for UEs in RRC_INACTIVE state, on suspension of the transmission of an SRS resource for positioning, a UE is expected to monitor the configured RS for spatial relation, and if the UE determines the accurate measurements, the UE resumes the SRS transmission.

From TRP/gNB perspective, the receive may be unaware whether the UE is able to measure the spatial relation of SRS accurately and will continuously monitor the SRS. The UE can suspend the transmission of SRS. Therefore, TRP/gNB can monitor the SRS and limit the activity to receive the UE’s SRS, i.e., relax the measurement and/or monitor behavior for SRS. When TRP/gNB receive the SRS transmitted by that UE again, TRP/gNB can increase the activity to receive the UE’s SRS. Furthermore, the TRP/gNB will continuously monitor the UE’s SRS, i.e., recover the measurement and/or monitor behavior for SRS. In some embodiments, the TRP/gNB will monitor UE’s SRS intermittently, and LMF can configure a monitor window for intermittent monitor, where the monitor window configuration can include one or more of: a start time of monitor window, the duration of the monitor window, the periodicity of the monitor window.

Depicted in FIG. 7, the TRP/gNB can monitor SRS within the monitor window and will not monitor the SRS outside the monitor window and this embodiment enables TRP/gNB to relax the monitor of SRS and stop TRP/gNB monitor SRS continuously even if the UE suspend the transmission of SRS.

In Rel-18, UE is allowed to autonomously adjust the TA (timing advance) if UE is configured with SRS, via SRS-PosRRC-InactiveConfig-ValidityArea, valid in multiple cells within a validity area for RRC_INACTIVE mode. And there is an SRS area-specific TimeAlignmentTimer (TA timer) that controls how long the MAC entity considers the positioning SRS transmission in RRC_INACTIVE to be uplink time aligned. During the SRS transmission procedure, if a gNB/TRP transmits msg2 to the UE, and indicating a new TA command, the UE should restart the TA timer. In this case, the other gNB/TRP within the validity area should know that the current UE restarts the TA timer, and keep monitoring the SRS before the TA timer expires. The gNB/TRP that transmits the TA command should report to LMF, indicating (the time when) that UE restart the TA timer. And then the LMF send indication to other gNBs/TRPs within the validity area, indicating (the time when) that UE restart the TA timer.

With the enhancements proposed in this embodiment, the power consumption of TRP/gNB can be greatly reduced.

Embodiment 11: Measurements period requirements for 2 PFLs band width aggregation in RRC_CONNECTED state

In Rel-18, it is agreed that the total measurement period requirements with bandwidth aggregation across all PFL is defined as T_xxxx, total = T_aggregate + T_{non-aggregate} , where T_xxxx, total can be T_RSTD, total or T_{UERxTx, total.} For ease of description, T_aggregate is the total measurement period for aggregated measurements (e.g., measurements with bandwidth aggregation) across all PFLs. Referring to FIG. 8, a bandwidth aggregation example is shown. PRS resource set 1 (in PFL 1) and PRS resource set 3 (in PFL 2) are aggregated, PRS resource set 6 (in PFL 3) and PRS resource set 8 (in PFL 4) are aggregated. In this case, the measurement period requirements for aggregated PRS can be: T_aggregate =T_{aggregate, 1, 2}+T_{aggregate, 3, 4}. T_{non-aggregate} is equal to the Rel-17 the measurement period requirement, with the modification that only PRS resources that are not aggregated are counted in T_non- _aggregate. T_{aggregate, 1, 2} refers to the measurement period requirements in aggregated PFL 1 and PFL 2, T_{aggregate, 3, 4} refers to the measurement period requirements in aggregated PFL 3 and PFL 4. Specifically, in this example, in PFL 1, only PRS resource set 2 can be counted in the calculation of non-aggregate measurement period, where L_{available_PRS, i} for PFL 1 can only count the PRS duration K for DL PRS resource set 2, L_{available_PRS, i} for PFL 2 can only count the PRS duration K for DL PRS resource set 4, the same for PFL 3 and PFL 4. And the remaining parameters in Rel-17 can be reused.

If two PFLs (PFLs i and j) are aggregated, the measurement period for aggregated PRS in PFLs i and j is specified below (for UE in RRC_CONNECTED state) :

As discussed in current Rel-18, only the PFLs in the same band can be aggregated, several parameters in the above formula can be reused (the value of the following parameters are the same for PFL i and PFL j) :

N_{RxBeam, i, j}=N_RxBeam, i or N_{RxBeam, i, j}=N_RxBeam, j, where N_RxBeam, i is the UE Rx beam sweeping factor as defined in current specification.

k_{multiTEG, i, j}=k_multiTEG, i or k_{multiTEG, i, j}=k_multiTEG, j, where k_multiTEG, i is the scaling factor for measurement of same PRS resource with multiple Rx TEGs as defined in current specification.

K_{p, PRS, i, j}=K_p, PRS, i or K_{p, PRS, i, j}=K_p, PRS, j, where K_p, PRS, i is a scaling factor for a positioning frequency layer to be measured within the associated measurement gap pattern as defined in current specification.

orwhereis the maximum number of DL PRS resources in positioning frequency layer i configured in a slot as defined in current specification. Alternatively, can be the maximum number of DL PRS resources in aggregated PFLs i and j. Alternatively, can be the maximum number of DL PRS resources in aggregated PRS resource sets in PFLs i and j.

N_sample is the number of PRS measurement samples as defined in current specification.

N’ is UE capability for number of DL PRS resources that it can process in a slot as indicated by maxNumOfDL-PRS-ResProcessedPerSlot specified in TS 37.355.

The following parameters can be updated considering UE capability and different features in PFL i and PFL j:

T_{effect, i, j} is the periodicity of the PRS measurement in PFL i and PFL j: where T_i, _j corresponds to DL PRS processing capabilities for aggregated PRS processing of 2 PFLs in intra-band contiguous within a MG for RRC_CONNECTED state. T_{available_PRS, i, j}=LCM(T_PRS, i, j, MGRP_i, _j) , the least common multiple between T_PRS, i, j and MGRP_i, j. MGRP_i, j is the repetition periodicity of the measurement gap applicable for measurement in the PRS frequency layer i or j. T_PRS, i, jis the periodicity of DL PRS resource with muting of aggregated resource sets in positioning frequency layer i and j, and the aggregated resource sets in PFL i and PFL j have the same periodicity and muting pattern.

{N, T} is UE capability combination where N is a duration of DL PRS symbols in ms corresponding to durationOfPRS-ProcessingSysmbols processed every T ms corresponding to durationOfPRS-ProcessingSymbolsInEveryTms defined in DL PRS processing capabilities for aggregated PRS processing of 2 PFLs in intra-band contiguous within a MG for RRC_CONNECTED state.

CSSF_PRS, i, j=CSSF_PRS, i or CSSF_PRS, i, j=CSSF_PRS, j, where CSSF_PRS, i is the carrier-specific scaling factor for NR PRS-based positioning measurements in positioning frequency layer i as defined in current specification. Alternatively, if the CSSF of PFL i and PFL j are different, CSSF_PRS, i, j = max {CSSF_PRS, i, CSSF_PRS, j} or CSSF_PRS, i, j = min {CSSF_PRS, i, CSSF_PRS, j} or avg {CSSF_PRS, i, CSSF_PRS, j} .

L_{available_PRS, i, j} is the time duration of available PRS in the positioning frequency layer i and j to be measured during T_{available_PRS, i, j}, and is calculated in the same way as PRS duration K, where the calculation of PRS duration K only count each pair of DL PRS resource sets that aggregated for PRS measurement.

T_last, i, j is the measurement duration for the last PRS sample in aggregated PRS resource sets, including the sampling time and processing time. If all of the PRS resources to be measured are available in the same MG occasion during T_availabe, T_last, i, j = T_i, j +MGL. Otherwise, T_last, i, j = T_i, j + T_{available_PRS, i, j}.

Referring to FIG. 9, PRS resource set 1 (in PFL 1) and PRS resource set 3 (in PFL 2) are aggregated, T_aggregate =T_{aggregate, 1, 2}. T_{non-aggregate} is equal to the Rel-17 the measurement period requirement, with the modification that only PRS resources that are not aggregated are counted in T_{non-aggregate}, specifically, in this example, in PFL 1, only PRS resource set 2 can be counted in the calculation of non-aggregate measurement period, where L_{available_PRS, i} for PFL 1 can only count the PRS duration K for DL PRS resource set 2, L_{available_PRS, i} for PFL 2 can only count the PRS duration K for DL PRS resource set 4. Andfor non-aggregate PRS resource set can be the maximum number of DL PRS resources in non-aggregated PFLs. Alternatively, can be the maximum number of DL PRS resources in non-aggregated PRS resource set (s) in PFLs. For PFL 3 and PFL 4, the current measurement period requirement can be reused.

Embodiment 12: Measurement period requirements for 3 PFLs bandwidth aggregation in RRC_CONNECTED state

If three PFLs (PFLs i, j and k) are aggregated, the measurement period requirements for aggregate PRS in PFLs i, j, and k is specified below (for UE in RRC_CONNECTED state) :

As discussed in current Rel-18, only the PFLs in the same band can be aggregated, several parameters in the above formula can be reused (the value of the following parameters are the same for PFL i, PFL j and PFL k) :

N_{RxBeam, i, j, k}=N_RxBeam, i or N_{RxBeam, i, j,} _k=N_RxBeam, jor N_{RxBeam, i, j, k}=N_RxBeam, k, where N_RxBeam, i is the UE Rx beam sweeping factor as defined in current specification.

k_{multiTEG, i, j, k}=k_multiTEG, i or k_{multiTEG, i, j, k}=k_multiTEG, j or k_{multiTEG, i, j, k}=k_multiTEG, k, where k_multiTEG, i is the scaling factor for measurement of same PRS resource with multiple Rx TEGs as defined in current specification.

K_{p, PRS, i, j, k}=K_p, PRS, i or K_{p, PRS, i, j, k}=K_p, PRS, j or K_{p, PRS, i, j, k}=K_p, PRS, k, where K_p, PRS, i is a scaling factor for a positioning frequency layer to be measured within the associated measurement gap pattern as defined in current specification.

ororwhereis the maximum number of DL PRS resources in positioning frequency layer i configured in a slot as defined in current specification. Alternatively, can be the maximum number of DL PRS resources in aggregated PFLs i, j, and k. Alternatively, can be the maximum number of DL PRS resources in aggregated PRS resource sets in PFLs i, j and k.

N’is UE capability for number of DL PRS resources that it can process in a slot as indicated by maxNumOfDL-PRS-ResProcessedPerSlot specified in TS 37.355.

The following parameters can be updated considering UE capability and different features in PFL i, PFL j and PFL k:

T_{effect, i, j, k} is the periodicity of the PRS measurement in PFL i, PFL j and PFL k: where T_i, j, k corresponds to DL PRS processing capabilities for aggregated PRS processing of 3 PFLs in intra-band contiguous within a MG for RRC_CONNECTED state. T_{available_PRS, i, j, k}= LCM (T_{PRS, i, j, k}, MGRP_i, j, k) , the least common multiple between T_{PRS, i, j, k} and MGRP_i, j, k. MGRP_i, j, k is the repetition periodicity of the measurement gap applicable for measurement in the PRS frequency layer i or j or k. T_{PRS, i, j, k} is the periodicity of DL PRS resource with muting of aggregated resource sets in positioning frequency layer i, j and k, and the aggregated resource sets in PFL i, PFL j and PFL k have the same periodicity and muting pattern.

{N, T} is UE capability combination where N is a duration of DL PRS symbols in ms corresponding to durationOfPRS-ProcessingSysmbols processed every T ms corresponding to durationOfPRS-ProcessingSymbolsInEveryTms defined in DL PRS processing capabilities for aggregated PRS processing of 3 PFLs in intra-band contiguous within a MG for RRC_CONNECTED state.

CSSF_{PRS, i, j, k}=CSSF_PRS, i or CSSF_{PRS, i, j, k}=CSSF_PRS, jor CSSF_{PRS, i, j, k}=CSSF_PRS, k, where CSSF_PRS, i is the carrier-specific scaling factor for NR PRS-based positioning measurements in positioning frequency layer i as defined in current specification. Alternatively, if the CSSF of PFL i, PFL j and PFL k are different, CSSF_{PRS, i, j, k} = max {CSSF_PRS, i, CSSF_PRS, j, CSSF_PRS, k} or CSSF_{PRS, i, j, k} = min {CSSF_PRS, i, CSSF_PRS, j, CSSF_PRS, k} or avg {CSSF_PRS, i, CSSF_PRS, j, CSSF_PRS, k} .

L_{available_PRS, i, j, k} is the time duration of available PRS in the positioning frequency layer i, j and k to be measured during T_{available_PRS, i, j, k}, and is calculated in the same way as PRS duration K, where the calculation of PRS duration K only count each pair of DL PRS resource sets that aggregated for PRS measurement.

T_{last, i, j, k} is the measurement duration for the last PRS sample in aggregated PRS resource sets, including the sampling time and processing time. If all of the PRS resources to be measured are available in the same MG occasion during T_availabe, T_{last, i, j, k} = T_i, j, k +MGL. Otherwise, T_{last, i, j, k} = T_i, j, k+ T_{available_PRS, i, j, k}.

Referring now to FIG. 10, a bandwidth aggregation example for 3 PFLs is shown. Set 1 (in PFL 1) set 3 (in PFL 2) and set 5 (in PFL 3) are aggregated. In this case, T_aggregate =T_{aggregate, 1, 2, 3}. T_{non-aggregate} is equal to the Rel-17 the measurement period requirement, with the modification that only PRS resources that are not aggregated are counted in T_{non-aggregate,} specifically, in this example, in PFL 1, only PRS resource set 2 can be counted in the calculation of non-aggregate measurement period, where L_{available_PRS, i} for PFL 1 can only count the PRS duration K for DL PRS resource set 2, optionally, can be the maximum number of DL PRS resources in DL PRS resource set 2 or in PFL i, L_{available_PRS, i} for PFL 2 can only count the PRS duration K for DL PRS resource set 4, optionally, can be the maximum number of DL PRS resources in DL PRS resource set 4 or in PFL i, L_{available_PRS, i} for PFL 3 can only count the PRS duration K for DL PRS resource set 6, optionally, can be the maximum number of DL PRS resources in DL PRS resource set 6 or in PFL i, , and the remaining parameters in Rel-17 can be reused. For PFL 4, the current measurement period requirement can be reused.

Embodiment 13: Measurements period requirements for 2 or 3 PFLs bandwidth aggregation in RRC_IDLE or RRC_INACTIVE state

For UE in RRC IDLE or INACTIVE state, the measurements period requirements for RSTD in PFL can be:

The measurements period requirements for Rx Tx difference in PFL can be:

N_Rx, TEG, i and/or N_{RxTx, TEG, i} in current Rel-17 definition can be reused for bandwidth aggregation measurements period requirements. For bandwidth aggregation in PRS measurement period requirements, the above PFL index i can be updated as i, j (for 2 PFLs aggregation) or i, j, k (for 3 PFLs aggregation) .

The following parameters can be updated considering UE capability and different features in PFL i, PFL j (if aggregate 3 PFLs, in PFLs i, j, k) :

T_{effect, i, j} (for 2 PFLs aggregation) or T_{effect, i, j,} _k (for 3 PFLs aggregation) is the periodicity of the PRS measurement in PFL i, PFL j (if aggregate 3 PFLs, and PFL k) ;

(if aggregate 3 PFL, ) , where T_i, j or T_i, j, k corresponds to DL PRS processing capabilities for aggregated PRS processing of 2 or 3 PFLs in intra-band contiguous within a MG for RRC_IDLE or RRC_INACTIVE state. For 2 PFLs aggregation, T_{available_PRS, i, j}= LCM (T_PRS, i, j, T_DRX) , for 3 PFLs aggregation, T_{available_PRS, i, j, k}= LCM (T_{PRS, i, j, k}, T_DRX) , the least common multiple between T_PRS, i, j (or T_{PRS, i, j, k}) and T_DRX. T_DRX is the DRX cycle of the UE in the serving cell. T_PRS, i, j (orT_{PRS, i, j, k}) is the periodicity of DL PRS resource with muting of aggregated resource sets in positioning frequency layer i, j (or PFLs i, j, k) , and the aggregated resource sets in PFL i, PFL j (or PFL i, j, k) have the same periodicity and muting pattern.

{N, T} is UE capability combination where N is a duration of DL PRS symbols in ms corresponding to durationOfPRS-ProcessingSysmbols processed every T ms corresponding to durationOfPRS-ProcessingSymbolsInEveryTms defined in DL PRS processing capabilities for aggregated PRS processing of 2 (for 2 PFLs aggregation) or 3 (for 3 PFLs aggregation) PFLs in intra-band contiguous within a MG for RRC_IDLE or RRC_INACTIVE state.

CSSF_PRS, i, j or CSSF_{PRS, i, j, k} can be calculated as defined in embodiment #11 (for 2 PFLs aggregation) and embodiment #12 (for 3 PFLs aggregation) .

L_{available_PRS, i, j} or L_{available_PRS, i, j,} _k can be calculated as defined in embodiment #11 (for 2 PFLs aggregation) and embodiment #12 (for 3 PFLs aggregation) .

T_last, i, j or T_{last, i, j, k} can be calculated as defined in embodiment #11 (for 2 PFLs aggregation) and embodiment #12 (for 3 PFLs aggregation) .

The remaining parameters can reuse the definition specified in an earlier embodiment.

Embodiment 14: Measurements period requirements adaptation for the measurement time of last sample

Referring now to FIGs. 9 and 10, examples for aggregated and non-aggregated PRS measurements period requirements in 2 PFLs, are shown. FIG. 11 shows the case for non-aggregated PRS measurement. Moreover, the measurements period requirements can be calculated as (take RSTD as an example) :

For ease of description,

T_last, i is counted 2 times: 1 for PFL 1, another for PFL 2.

In FIG. 12, the measurements period requirements can be calculated as:
T_RSTD, total = T_aggregate + T_{non-aggregate};

where T_aggregate =T_{aggregate, i, j}, and

whereand

T_last, i and/or T_last, i, j is counted 3 times: 1 for aggregated set 1 and set 3, 1 for set 2 in PFL1, 1 for set 4 in PFL 2.

If bandwidth aggregation is adopted in PRS reception, the counting times for T_last, i and/or T_last, i, j and/or T_{last, i, j, k} can be equal to L, where L is total number of positioning frequency layers. The last PRS sample in aggregated PRS resource sets, including the sampling time and processing time can be omitted, i.e. (take RSTD as an example) .

For UE in RRC_CONNECTED state:

Or

For UE in RRC_IDLE or RRC_INACTIVE state:

Or

Alternatively, the sampling time and processing time for the last PRS sample may include the T_last, i or T_last, i, j or T_{last, i, j, k} that UE receives and measures the last PRS sample in a resource set or in aggregated resource sets. For example, if the last PRS sample received and measured by UE is a PRS instance in resource set 2 (non-aggregated PRS resource set) , the measurements period requirements only includes T_last, i, where i =1 (in PFL1) ; if the last PRS sample received and measured by UE is a PRS instance in resource set 1 (aggregated PRS resource set) , the measurements period requirements only includes T_last, i, j, where i = 1, j=2. In this alternative, the sample time and processing time for the last PRS sample only counted 1 time.

Alternatively, the sampling time and processing time for the last PRS sample may include the T_last, i or T_last, i, j or T_{last, i, j, k} that UE receives and measures the last L PRS samples (e.g., in non-duplicate PRS resource groups, where a group refers to the aggregated PRS resource sets aggregated or non-aggregated PRS resource sets in a PFL or non-aggregated PRS resource set in a PFL) in a resource set or in aggregated resource sets. As depicted in FIG. 13, there are 3 PFLs, PRS resource set 1 and set 3 are aggregated. The PRS resource groups in this embodiment includes 4 groups: Group 1 represents an aggregated PRS resource set 1 and PRS resource set 3, Group 2 represents a non-aggregated PRS resource set 2, Group 3 represents a non aggregated PRS resource set 4, and Group 4 represents non aggregated PRS resource sets 5 and 6.

Referring now to FIG. 14, the PRS reception and measurement timeline is shown and the last L PRS samples refers to the last sample received and measured in set 1, set 2, and set 6. T_last, 1, 2, T_last, 1 and T_last, 3 can be counted in this example. This embodiment can also be applied to UE Rx-Tx time difference measurements period requirements.

Embodiment 15: Anchor UE’s Priority information

In Rel-18, sidelink positioning is discussed to enable positioning without received PRS from gNB/TRP, instead, SL-PRS is enabled to realize positioning between UEs. In a sidelink positioning process, two kinds of UEs can be involved, (e.g., target UE and anchor UE) . Anchor UE is selected to transmit SL-PRS to the target UE as well as receive SL-PRS transmitted by the target UE to complete the positioning process. In the positioning process, the selection of anchor UE selection can consider the UE’s location, the channel condition between anchor UE and target UE, etc. The server UE or gNB or LMF may configure a list of anchor UE, and optionally the priority information of each anchor UE. Server UE and/or LMF and/or gNB may provide the priority information of anchor UE for the positioning of target UE or PRU, which indicates the selection priority of the anchor UE. The priority information may include one or more of: Candidate anchor UE ID, Target UE ID, Priority level, or indicator.

Alternatively, the priority information of anchor UE selection (for the positioning purpose of the target UE) can be reported by the PRU and/or the target UE to the LMF and/or gNB and/or server UE. If reported by a candidate anchor UE, the priority information may include the Target UE ID, the Priority level or the indicator. Furthermore, if reported by the target UE, the priority information may include the Candidate anchor UE ID, Priority level, or indicator.

Embodiment 16: Anchor UE’s Priority associate with SL-PRS configuration

The priority information for candidate anchor UE can be associated with SL-PRS configuration of the candidate anchor UE. Depicted in FIG. 15, there are 2 candidate anchor UEs around a target UE. And there’s a LOS PRS beam between candidate anchor UE 1 and the target UE. The distance between candidate anchor UE 2 and the target UE is closer but UE cannot detect the PRS transmitted by candidate anchor UE 2. Therefore, the distance information and LOS/NLOS channel condition cannot be the only selection/priority determination criteria. The selection/priority of candidate anchor UE can be associate with the configuration of SL-PRS of different candidate anchor UEs. If the target UE also transmit SL-PRS for positioning process, the priority information for candidate anchor UE can be associated with SL-PRS configuration of the target UE. Depicted in FIG. 16, candidate anchor UE 1 cannot detect the target UE’s SL-PRS. The distance information and LOS/NLOS channel condition cannot be the only selection/priority determination criteria. The selection/priority of candidate anchor UE can be associate with the configuration of SL-PRS target UE.

The server UE and/or LMF and/or gNB may provide the priority information of candidate anchor UEs for the positioning of target UE associate with SL-PRS configuration and/or SL-PRS beam information. The priority information may include one or more of: the Candidate anchor UE ID, Target UE ID, SL-PRS configuration of the candidate anchor UE, SL-PRS beam information of the candidate anchor UE, SL-PRS configuration of the target UE, SL-PRS beam information of the target UE, Priority level, or indicator.

Alternatively, the priority information of different candidate anchor UEs (for the positioning purpose of the target UE) can also be reported by the candidate anchor UE and/or the target UE to the LMF and/or gNB and/or server UE. Alternatively, if the priority of different candidate anchor UEs for the positioning of target UE is associated with SL-PRS configuration, the priority information can be embedded and/or included in the SL-PRS configuration. Alternatively, the LMF/gNB can provide the above candidate anchor UEs priority information to gNB/LMF, where the priority information can be included in NRPPa. Specifically, if provided by the gNB, the candidate anchor UEs’ priority information can be included in SL-PRS configuration.

Embodiment 17: Anchor UE recommendation

The server UE and/or LMF and/or gNB can recommend a list of candidate anchor UE (s) to the target UE, indicating that the list of candidate anchor UE (s) can be selected, the list can be Candidate anchor UE ID 1, (Priority level or indicator for candidate anchor UE ID 1) , Candidate anchor UE ID 1, (Priority level or indicator for candidate anchor UE ID 2) , ..., Candidate anchor UE ID N, (Priority level or indicator for candidate anchor UE ID N) . The candidate anchor UE ID can be used to identify a UE uniquely. The priority level or indicator specifies the selection priority of the candidate anchor UE (for the positioning purpose of the target UE) . Specifically, the IE type and reference can be INTEGER (L, ..., U) . The lower bound and upper bound of the priority level or indicator are L and U, where L may represent the highest priority and U may represent the lowest priority. The priority level or indicator can be associated with or determined by one or more of : Positioning method, In coverage or not, RSRP, LOS/NLOS, Channel condition, UE’s location, or distance between candidate UE and target UE, PLMN, SL-PRS configuration of candidate anchor UE, or SL-PRS configuration of the target UE.

Claims

A wireless communication method, comprising:

receiving, by a wireless communication entity, assistance information for positioning.
The wireless communication method of claim 1, wherein the assistance information include the priority information of one or more of a plurality of reference wireless communication devices surrounding a wireless communication device.
The wireless communication method of claim 2, wherein the priority information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU ID, a UE ID, or a priority level of a corresponding one of the one or more reference wireless communication devices.
The wireless communication method of claim 2, wherein the priority information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU ID, a UE ID, a PRS resource ID, a PRS resource set ID, or a priority level of a corresponding one of the one or more reference wireless communication devices.
The wireless communication method of claim 2, wherein the priority information includes a list of the one or more reference wireless communication devices.
The wireless communication method of claim 5, wherein the list includes at least one of: a PRU ID or a priority level of a corresponding one of the one or more reference wireless communication devices.
The wireless communication method of claim 5, wherein the list is included in a PRS resource set or a PRS resource configuration.
The wireless communication method of claim 1, further comprising:

sending, by the wireless communication entity to another wireless communication entity, a list of the one or more reference wireless communication devices;

wherein the list is included in a New Radio Positioning Protocol A (NRPPa) .
The wireless communication method of claim 5, wherein the list is associated with at least one of: a PRS resource set or a PRS resource configuration.
The wireless communication method of claim 2, wherein the priority information includes one or more group (s) information of the one or more reference wireless communication devices.
The wireless communication method of claim 10, wherein the group (s) information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU group, a UE ID, or a priority level of a corresponding one of the one or more reference wireless communication devices.
The wireless communication method of claim 10, wherein the group (s) information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU group, a UE ID, a PRS resource ID, a PRS resource set ID, or a priority level of a corresponding one of the one or more reference wireless communication devices.
The wireless communication method of claim 1, further comprising:

receiving, by the wireless communication entity from the target wireless communication device, a message requesting the priority information;

wherein the request for priority information is included in Request Assistance Data.
The wireless communication method of claim 1, further comprising:

sending, by the wireless communication entity to another wireless communication entity, the priority information of one or more of a plurality of reference wireless communication devices surrounding a target wireless communication device.
A wireless communication method, comprising:

receiving, by a wireless communication device, assistance information from a wireless communication entity.
A wireless communication method, comprising:

reporting, by a reference wireless communication device, measurement information to a wireless communication entity or the target wireless communication device.
The wireless communication method of claim 15, further comprising:

receiving, by a target wireless communication device from a wireless communication entity, priority information of one or more of a plurality of reference wireless communication devices surrounding the target wireless communication device.
The wireless communication method of claim 16, wherein the measurement information includes at least one of: error information of RSTD, error information of carrier phase, error information of carrier phase difference.
The wireless communication method of claim 18, wherein the error information of RSTD includes at least one of: ID of the reference TRP, ID of the measured TRP, PRU ID, or error value of RSTD.
The wireless communication method of claim 18, wherein the error information of carrier phase includes at least one of: ID of the measured TRP, PRU ID, or error value of carrier phase.
The wireless communication method of claim 18, wherein the error information of carrier phase difference includes at least one of: ID of the reference TRP, ID of the measured TRP, PRU ID, or error value of carrier phase difference.
The wireless communication method of claim 17, wherein the priority information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU ID, a UE ID, or a priority level of a corresponding one of the one or more reference wireless communication devices.
The wireless communication method of claim 17, wherein the priority information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU ID, a UE ID, a PRS resource ID, a PRS resource set ID, or a priority level of a corresponding one of the one or more reference wireless communication devices.
The wireless communication method of claim 17, wherein the priority information includes one or more groups of the one or more reference wireless communication devices.
The wireless communication method of claim 24, wherein the priority information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU group, a UE ID, or a priority level of a corresponding one of the one or more reference wireless communication devices.
The wireless communication method of claim 24, wherein the priority information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU group, a UE ID, a PRS resource ID, a PRS resource set ID, or a priority level of a corresponding one of the one or more reference wireless communication devices.
The wireless communication method of claim 15, further comprising:

sending, by the target wireless communication device to the wireless communication entity, a message requesting the priority information.
The wireless communication method of claim 27, wherein the priority information is included in Request Assistance Data.
The wireless communication method of claim 15, further comprising:

receiving, by the target wireless communication device from the wireless communication entity or the one or more reference wireless communication devices, PRS configuration information of the one or more reference wireless communication devices;

wherein the PRS configuration information comprises a plurality of information elements, each of the information elements includes at least one of: a PRU ID, NR-DL-PRS-Info of a reference TRP, or NR-DL-PRS-Info of a measured TRP associated with a corresponding one of the one or more reference wireless communication devices.
The wireless communication method of claim 15, further comprising:

receiving, by the target wireless communication device from the wireless communication entity or the one or more reference wireless communication devices, PRS transmission information related to measurement results of the one or more reference wireless communication devices.
The wireless communication method of claim 30, wherein the PRS transmission information comprises a plurality of information elements, each of the information elements includes at least one of: beam information of a measured PRS instance, timing information of the measured PRS instance, or location information of a TRP that transmits the measured PRS instance.
The wireless communication method of claim 31, wherein the beam information of the measured PRS instance includes an ID of a PRS resource and DL-PRS-BeamInfoElement of the PRS resource.
The wireless communication method of claim 15, further comprising:

receiving, by the target wireless communication device from the wireless communication entity, one or more common PRS configuration IDs.
The wireless communication method of claim 33, wherein the common PRS configuration IDs each comprise a plurality of information elements, each of the information elements includes at least one of: a PRS resource ID, a PRS resource set ID, a TRP ID, or a PRU ID.
The wireless communication method of claim 15, further comprising:

receiving, by the target wireless communication device, an indication associating a first PRS configuration for the one or more reference wireless communication devices and a second PRS configuration for the target wireless communication device.
The wireless communication method of claim 35, wherein the indication comprises a plurality of information elements, each of the information elements includes at least one of: an ID set of PRU, an ID set of UE, or an association indication.
The wireless communication method of claim 15, further comprising:

receiving, by the target wireless communication device from the wireless communication entity or the one or more reference wireless communication devices, a measured PRS resource ID together with a corresponding measurement result.
The wireless communication method of claim 15, further comprising:

reporting, by the target wireless communication device, its capability on a supported maximum number of measurement windows.
The wireless communication method of claim 1, further comprising:

sending, by a wireless communication entity, the TRP location information to a reference wireless communication device.
The wireless communication method of claim 39, wherein the TRP location information includes at least one of: NR-TRP-LocationInfo, NR-RTD-Info, or NR-DL-PRS-TEG-Info.
The wireless communication method of claim 16, further comprising:

reporting, by the reference wireless communication device, error information to the wireless communication entity or a target wireless communication device.
The wireless communication method of claim 41, wherein the error information includes at least one of: error information of RSTD, error information of carrier phase, error information of carrier phase difference.
The wireless communication method of claim 42, wherein the error information of RSTD includes at least one of: ID of the reference TRP, ID of the measured TRP, PRU ID, or error value of RSTD.
The wireless communication method of claim 42, wherein the error information of carrier phase includes at least one of: ID of the measured TRP, PRU ID, or error value of carrier phase.
The wireless communication method of claim 42, wherein the error information of carrier phase difference includes at least one of: ID of the reference TRP, ID of the measured TRP, PRU ID, or error value of carrier phase difference.
The wireless communication method of claim 15, wherein the assistance information includes priority information of anchor UEs, wherein the priority information includes at least one of: candidate anchor UE ID, target UE ID, priority level or indicator.
The wireless communication method of claim 46, wherein the priority information of anchor UEs includes at least one of: candidate anchor UE ID, target UE ID, priority level or indicator, SL-PRS configuration of the candidate anchor UE, SL-PRS beam information of the candidate anchor UE, SL-PRS configuration of the target UE, SL-PRS beam information of the target UE.
The wireless communication method of claim 46, wherein the priority information can be included in a SL-PRS configuration.
The wireless communication method of claim 46, wherein the priority information comprises a plurality of information elements, each of the information elements includes at least one of: candidate anchor UE ID list, a UE ID, or a priority level of a corresponding one of the one or more reference wireless communication devices.
The wireless communication method of claim 15, further comprising:

determining, by a wireless communication device, a measurement period requirement;

wherein the wireless communication device is configured to measure reference signal for positioning within the period.
The wireless communication method of claim 50, wherein the measurement period requirement for bandwidth aggregation PRS measurement for 2 PFLs (PFL i and PFL j) is defined as

the measurement period requirement for bandwidth aggregation PRS measurement for 3 PFLs (PFL i, PFL j and PFL k) is defined as
The wireless communication method of claim 51, wherein T_{effect, i, j} is the periodicity of the PRS measurement in PFL i and PFL j: wherein T_i, j corresponds to DL PRS processing capabilities for aggregated PRS processing of 2 PFLs in intra-band contiguous within a MG a MG for RRC_CONNECTED or RRC_IDLE or RRC_INACTIVE state; T_{available_PRS, i, j}= LCM (T_PRS, i, j, MGRP_i, j) is the least common multiple between T_PRS, i, j and MGRP_i, j; MGRP_i, j is the repetition periodicity of the measurement gap applicable for measurement in the PRS frequency layer i or j; T_PRS, i, jis the periodicity of DL PRS resource with muting of aggregated resource sets in positioning frequency layer i and j, wherein T_{effect, i, j, k} is the periodicity of the PRS measurement in PFL i, PFL j and PFL k: wherein T_i, j, k corresponds to DL PRS processing capabilities for aggregated PRS processing of 3 PFLs in intra-band contiguous within a MG for RRC_CONNECTED or RRC_IDLE or RRC_INACTIVE state; T_{available_PRS, i, j, k}= LCM (T_{PRS, i, j, k}, MGRP_i, j, k) , the least common multiple between T_{PRS, i, j, k} and MGRP_i, j, k; MGRP_i, j, k is the repetition periodicity of the measurement gap applicable for measurement in the PRS frequency layer i or j or k; T_{PRS, i, j, k} is the periodicity of DL PRS resource with muting of aggregated resource sets in positioning frequency layer i, j and k, and the aggregated resource sets in PFL i, PFL j and PFL k have the same periodicity and muting pattern.
The wireless communication method of claim 52, for 2 PFL bandwidth aggregation PRS measurement , {N, T} is UE capability combination where N is a duration of DL PRS symbols in ms corresponding to durationOfPRS-ProcessingSysmbols processed every T ms corresponding to durationOfPRS-ProcessingSymbolsInEveryTms defined in DL PRS processing capabilities for aggregated PRS processing of 2 PFLs in intra-band contiguous within a MG for RRC_CONNECTED or RRC_IDLE or RRC_INACTIVE state; For 3 PFL bandwidth aggregation PRS measurement, {N, T} is UE capability combination where N is a duration of DL PRS symbols in ms corresponding to durationOfPRS-ProcessingSysmbols processed every T ms corresponding to durationOfPRS-ProcessingSymbolsInEveryTms defined in DL PRS processing capabilities for aggregated PRS processing of 3 PFLs in intra-band contiguous within a MG for RRC_CONNECTED or RRC_IDLE or RRC_INACTIVE state.
The wireless communication method of claim 1, further comprising:

sending, by the wireless communication entity to another wireless communication entity, a configuration information.
The wireless communication method of claim 54, wherein the configuration information includes a configuration of a window for intermittent monitor, wherein the configuration includes at least one of: start time of monitor window, the duration of the monitor window, the periodicity of the monitor window.
The wireless communication method of claim 15, further comprising:

requesting, by a wireless communication device, to a wireless communication entity, the configuration information of reference wireless communication device.
The wireless communication method of claim 56, wherein the configuration information include the PRS configuration of reference wireless communication device.
The wireless communication method of claim 56, wherein the configuration information include the PRS configuration of reference wireless communication that related to the measurement result.
The wireless communication method of claim 56, wherein the configuration information include the association information of the PRS configuration for the wireless communication device ad the reference wireless communication device.
A wireless communications apparatus comprising a processor and a memory, wherein the processor is configured to read code from the memory and implement a method recited in any of claims 1 to 59.
A computer program product comprising a computer-readable program medium code stored thereupon, the code, when executed by a processor, causing the processor to implement a method recited in any of claims 1 to 59.