System and method for carrier phase positioning

Abstract

A system and method for carrier phase positioning are presented. A user equipment (UE) may receive configuration information of a reference signal for positioning from a network. The configuration information may include carrier phase-related (CP-related) information configured for the reference signal. The UE may perform CP measurements on the reference signal based on the CP-related information. The UE may transmit a report to the network comprising the CP measurement results. In one embodiment, the report comprises a timestamp attached to the CP measurement results. In one embodiment, the configuration information comprises PRS processing windows (PPWs) configured for multiple carriers in a positioning frequency layer (PFL).

Description

[Technical Field]

[0001] This disclosure relates to wireless communications, including, but not limited to, systems and methods for carrier phase positioning. [Background technology]

[0002] The Third Generation Partnership Project (3GPP®), a standardization body, is currently working on defining not only a new radio interface called 5G New Radio (5G NR), but also the Next Generation Packet Core Network (NG-CN or NGC). 5G NR will have three main components: the 5G Access Network (5G-AN), the 5G Core Network (5GC), and the User Equipment (UE). To facilitate the use of different data services and requirements, the elements of the 5GC, also called network functions, have been simplified, some of which are software-based and some are hardware-based, so that they can be adapted as needed. [Overview of the project] [Means for solving the problem]

[0003] The exemplary embodiments disclosed herein are intended not only to solve problems relating to one or more of the problems presented in the prior art, but also to provide further features which will become readily apparent by referring to the following detailed description in conjunction with the accompanying drawings. Exemplary systems, methods, devices, and computer program products are disclosed herein according to various embodiments. However, it should be understood that these embodiments are presented as examples and are not limiting, and various modifications to the disclosed embodiments can be made, while remaining within the scope of the disclosure, as will be apparent to those skilled in the art reading this disclosure.

[0004] At least one aspect relates to the following systems, methods, apparatus, or computer-readable media: A user device (UE) may receive configuration information for a reference signal for positioning from a network. The configuration information may include carrier phase-related (CP-related) information configured for the reference signal. The UE may perform CP measurements on the reference signal based on the CP-related information. The UE may transmit a report containing the CP measurement results to the network. The report may include a timestamp attached to the CP measurement results.

[0005] In some embodiments, configuration information may include PRS processing windows (PPWs) configured for multiple carriers within a positioning frequency layer (PFL). CP measurements may include CP values ​​when the UE reports timing-related information. CP measurements may include CP values ​​when the UE reports angle-related information. The UE may indicate which of the multiple carriers or PFLs should be measured together by the network.

[0006] In some embodiments, the report may indicate that the CP measurement is measured over a single PFL or over multiple PFLs. The CP measurement may be performed at the center of multiple PFLs. The CP measurement may be performed at the center of multiple carriers when the UE performs timing-based measurements for multiple carriers.

[0007] In some embodiments, CP measurements may be performed within a CP-specific period configured for all of the multiple PFLs. The CP-specific period may be associated with at least one of the number of PFLs, the CP measurement period for one of the PFLs, or the effective reception time of the PRS within the period. The CP-specific period may be defined as follows:

number

[0008] In some embodiments, CP measurements may be performed within a CP-specific period configured for all of the multiple PFLs. The CP-specific period may be associated with a scaling factor when the CP measurement is performed using a timing-based measurement. The CP-specific period may be defined as follows:

number

[0009] In some embodiments, the CP measurement may be performed within a CP-specific period configured for all of the multiple PFLs. The CP-specific period may be associated with a scaling factor when the CP measurement is performed using angle-based measurements. The UE may report its ability to perform CP measurements when the UE is in a Radio Resource Control (RRC) inactive state. The UE may restart the CP measurement when one or more symbols of the reference signal are dropped during the CP measurement. The UE may restart the CP measurement when it occurs over two sampling durations.

[0010] In some embodiments, a UE may receive the location of the second UE or a second CP measurement associated with the second UE from a second UE. The second UE may broadcast its location and the second CP measurement. The CP measurement may be performed relative to a reference signal with a certain direction and resolution. The CP measurement may be transmitted in a second report with a certain direction and resolution. The CP measurement may be performed on the same TRP Tx TEG in a timing-based measurement across the same PRS resource.

[0011] In some embodiments, the UE may send a request to the Location Management Function (LMF) with the help of a second UE. The request may include at least one of a rough location of the UE, an identification of the serving gNB / TRP, an identification of a reference signal, an identification of a resource for the reference signal, or an identification of a resource set for the reference signal. The configuration information may include second CP measurement results performed by the second UE. The second CP measurement results may include at least one of a location of the second UE, an identification of the serving gNB / TRP, an identification of a second reference signal, an identification of a resource for the second reference signal, or an identification of a resource set for the second reference signal.

[0012] In some embodiments, the UE may receive a request from the LMF network entity to perform CP measurements using Q Rx PEG for the same reference signal resource. The parameter Q may be an integer. The UE may receive a request from the LMF network entity to tag the CP measurements with a TEG ID. The report may include a LOS / NLOS indication for the CP measurement results. The report may include a LOS probability for CP measurement results higher than a LOS threshold.

[0013] In some embodiments, the wireless communication node may receive configuration information of a reference signal for positioning. The configuration information may include carrier phase related (CP related) information configured for the reference signal. The wireless communication node may perform CP measurements on the reference signal based on the CP related information. The wireless communication node may send a report with the CP measurement results. The wireless communication node may be composed of a plurality of PRS resources. The wireless communication node may be configured to broadcast its location in a System Information Block (SIB). The report may include a differential CP value indicating which of the plurality of reference PEGs is the first PEG. The present invention provides, for example, the following: (Item 1) A wireless communication method for positioning, wherein the wireless communication method is The user equipment (UE) receives configuration information of a reference signal for positioning from the network, wherein the configuration information includes carrier phase-related (CP-related) information configured for the reference signal. The UE performs CP measurement on the reference signal based on the CP-related information, The UE transmits a report containing CP measurement results to the network. Wireless communication methods, including those mentioned above. (Item 2) The wireless communication method described in item 1, wherein the report includes a timestamp attached to the CP measurement result. (Item 3) The wireless communication method according to item 1, wherein the configuration information comprises a PRS processing window (PPW) configured for multiple carriers within the positioning frequency layer (PFL). (Item 4) The wireless communication method according to item 1, wherein the CP measurement includes a CP value when the UE reports timing-related information. (Item 5) The wireless communication method according to item 1, wherein the CP measurement includes a CP value when the UE reports angle-related information. (Item 6) The wireless communication method described in item 1, wherein the UE indicates, by the network, which of the multiple carriers or PFLs should be measured together. (Item 7) The wireless communication method described in item 1, wherein the report indicates whether the CP measurement is measured over a single PFL or over multiple PFLs. (Item 8) The CP measurement is performed at the center of multiple PFLs, according to the wireless communication method described in item 1. (Item 9) The wireless communication method according to item 1, wherein the CP measurement is performed at the center of the plurality of carriers when the UE performs timing-based measurements on the plurality of carriers. (Item 10) The wireless communication method according to item 1, wherein the CP measurement is performed within a CP specific period configured for all of the multiple PFLs, and the CP specific period is associated with at least one of the number of PFLs, the CP measurement period for one of the PFLs, or the effective reception time of the PRS within a certain period. (Item 11) The aforementioned CP specific period is, (Number 20) It is defined as follows, where the parameter L represents the number of PFLs configured for the CP measurement, and the parameter T CP,i represents the CP measurement period for one individual PFL, the max() represents the maximum calculation, and the parameter T effective,i This refers to the wireless communication method described in item 10, which represents the effective reception time of the PRS. (Item 12) The wireless communication method according to item 1, wherein the CP measurement is performed within a CP-specific period configured for all of the multiple PFLs, and the CP-specific period is associated with a scaling factor when the CP measurement is performed in a timing-based measurement. (Item 13) The aforementioned CP specific period is, (Math 21) It is defined as such, where the parameter SF represents the scaling factor, and the parameter T RSTD,i The wireless communication method described in item 12 represents the measurement period for the RSTD for the PFL. (Item 14) The wireless communication method according to item 1, wherein the CP measurement is performed within a CP-specific period configured for all of the multiple PFLs, and the CP-specific period is associated with a scaling factor when the CP measurement is performed using an angle-based measurement. (Item 15) The wireless communication method according to item 1, further comprising the UE reporting its ability to perform CP measurements when the UE is in a Radio Resource Control (RRC) inactive state. (Item 16) The wireless communication method according to item 1, further comprising restarting the CP measurement when one or more symbols of the reference signal are dropped by the UE during the CP measurement. (Item 17) The wireless communication method according to item 1, further comprising restarting the CP measurement when the CP measurement occurs over two sampling durations by the UE. (Item 18) The UE further includes receiving from the second UE the location of the second UE or a second CP measurement associated with the second UE, The wireless communication method according to item 1, wherein the second UE broadcasts its location and the second CP measurement. (Item 19) The wireless communication method according to item 1, wherein the CP measurement is performed with respect to the reference signal with a certain direction and resolution. (Item 20) The wireless communication method described in item 1, wherein the CP measurement is transmitted in a second report with a certain direction and resolution. (Item 21) The wireless communication method described in item 1, wherein the CP measurement is performed on the same TRP Tx TEG in a timing-based measurement across the same PRS resource. (Item 22) The aforementioned UE further includes sending a request to a Location Management Function (LMF) network entity with the help of a second UE, The wireless communication method according to item 1, wherein the requirement comprises at least one of the following: the approximate location of the UE, identification of a serving gNB / TRP, identification of a reference signal, identification of resources for the reference signal, or identification of a set of resources for the reference signal. (Item 23) The wireless communication method according to item 1, wherein the configuration information comprises a second CP measurement result performed by a second UE, the second CP measurement result comprising at least one of the location of the second UE, identification of a serving gNB / TRP, identification of a second reference signal, identification of a resource for the second reference signal, or identification of a resource set for the second reference signal. (Item 24) The wireless communication method according to item 1, further comprising the UE receiving a request from an LMF network entity to perform the CP measurement with Q Rx PEGs against the same reference signal resource, wherein the parameter Q is an integer. (Item 25) The wireless communication method according to item 1, further comprising the UE receiving a request from an LMF network entity to tag the CP measurement with a TEG ID. (Item 26) The wireless communication method according to item 1, wherein the report includes LOS / NLOS indication for the CP measurement results. (Item 27) The wireless communication method described in item 1, wherein the report includes an LOS probability for the CP measurement result that is higher than the LOS threshold. (Item 28) A wireless communication method for positioning, wherein the wireless communication method is The wireless communication node receives configuration information of a reference signal for positioning, wherein the configuration information includes carrier phase-related (CP-related) information configured for the reference signal. The wireless communication node performs CP measurement on the reference signal based on the CP-related information, The wireless communication node transmits a report containing CP measurement results. Wireless communication methods, including those mentioned above. (Item 29) The wireless communication method according to item 28, wherein the wireless communication node is composed of a plurality of PRS resources, and the wireless communication node is configured to broadcast its location in a System Information Block (SIB). (Item 30) The aforementioned report includes a wireless communication method as described in item 28, which includes a differential CP value indicating which of several reference PEGs is the first PEG. (Item 31) A wireless communication device comprising a processor and memory, wherein the processor is configured to read code from the memory and to perform the method described in any one of items 1 to 30. (Item 32) A computer program product, wherein the computer program product stores computer-readable program medium code thereon, and the code, when executed by a processor, causes the processor to perform the method described in any one of items 1 to 30. [Brief explanation of the drawing]

[0014] Various exemplary embodiments of this solution are described in detail below with reference to the following figures or drawings. The drawings are provided for illustrative purposes only and depict exemplary embodiments of this solution to facilitate the reader's understanding of it. Therefore, the drawings should not be considered to limit the scope, extent, or applicability of this solution. It should be noted that these drawings are not necessarily drawn to actual size in order to make the illustration clear and easy to understand.

[0015] [Figure 1] An example of a cellular communication network in which the technologies disclosed herein may be implemented according to embodiments of this disclosure is provided.

[0016] [Figure 2] The following are example block diagrams of base stations and user equipment devices according to some embodiments of the present disclosure.

[0017] [Figure 3] This disclosure illustrates exemplary implementations of carrier phase positioning according to several embodiments.

[0018] [Figure 4] This disclosure illustrates exemplary implementations of carrier phase positioning according to several embodiments.

[0019] [Figure 5] This disclosure illustrates exemplary implementations of radio waves with multiple wavelengths according to several embodiments.

[0020] [Figure 6] This disclosure illustrates exemplary implementations of carrier phase positioning according to several embodiments.

[0021] [Figure 7]This disclosure illustrates exemplary implementations of carrier phase positioning according to several embodiments.

[0022] [Figure 8] A flowchart illustrating an example of a method for carrier phase positioning according to an embodiment of this disclosure is provided. [Modes for carrying out the invention]

[0023] (1. Mobile communication technologies and environment) Figure 1 illustrates an exemplary wireless communication network and / or system 100 in which the techniques disclosed herein may be implemented according to one 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 will be referred to herein as “Network 100”. Such exemplary Network 100 includes base stations 102 (hereinafter “BS102”, also called wireless communication nodes) and user equipment devices 104 (hereinafter “UE104”, also called wireless communication devices) that can communicate with each other via communication links 110 (e.g., wireless communication channels), and clusters of cells 126, 130, 132, 134, 136, 138, and 140 overlapping geographical area 101. In Figure 1, BS102 and UE104 are contained within the respective geographical boundaries of cell 126. Each of the other cells 130, 132, 134, 136, 138, and 140 may include at least one base station operating within its allocated bandwidth to provide adequate radio coverage to the intended users.

[0024] For example, BS102 may operate within its allocated channel transmission bandwidth to provide adequate coverage to UE104. BS102 and UE104 may communicate via downlink radio frames 118 and uplink radio frames 124, respectively. Each radio frame 118 / 124 may be further divided into subframes 120 / 127, which may contain data symbols 122 / 128. In this disclosure, BS102 and UE104 are described herein as non-limiting examples of “communication nodes” that can generally implement the methods disclosed herein. Such communication nodes may be capable of performing wireless and / or wired communications according to various embodiments of the present solution.

[0025] Figure 2 illustrates a block diagram of an exemplary wireless communication system 200 for sending and receiving wireless communication signals (e.g., OFDM / OFDMA signals) according to several embodiments of the present solution. The system 200 may include components and elements configured to support known or conventional operating features that do not need to be described in detail herein. In one exemplary embodiment, the system 200 may be used to communicate (e.g., transmit and receive) data symbols in a wireless communication environment such as the wireless communication environment 100 in Figure 1, as described above.

[0026] System 200 generally includes a base station 202 (hereinafter, "BS202") and a user equipment device 204 (hereinafter, "UE204"). BS202 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 to one another as needed via a data communication bus 220. UE204 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 to one another as needed via a data communication bus 240. BS202 communicates with UE204 via a communication channel 250, which can be any wireless channel or other medium suitable for data transmission as described herein.

[0027] As will be understood by those skilled in the art, System 200 may further include any number of modules other than those shown in Figure 2. Those skilled in the art will understand that various exemplary blocks, modules, circuits, and processing logic described in relation to the embodiments disclosed herein may be implemented in hardware, computer-readable software, firmware, or any practical combination thereof. To clearly illustrate this compatibility and suitability of hardware, firmware, and software, various exemplary components, blocks, modules, circuits, and steps are described in general terms for their functionality. Whether such functionality is implemented as hardware, firmware, or software may depend on the specific application and the design constraints imposed on the system as a whole. Those familiar with the concepts described herein may implement such functionality in a manner suitable for each specific application, but such decisions on implementation should not be construed as limiting the scope of this disclosure.

[0028] According to some embodiments, the UE transceiver 230 may be referred herein as an “uplink” transceiver 230, comprising a radio frequency (RF) transmitter and an RF receiver, each having a circuit coupled to antenna 232. Alternatively, a duplex switch (not shown) may couple the uplink transmitter or receiver to the uplink antenna in a time-duplex manner. Similarly, according to some embodiments, the BS transceiver 210 may be referred herein as a “downlink” transceiver 210, comprising an RF transmitter and an RF receiver, each having a circuit coupled to antenna 212. Alternatively, a downlink duplex switch may couple the downlink transmitter or receiver to the downlink antenna 212 in a time-duplex manner. The operation of the two transceiver modules 210 and 230 may be time-coordinated so that the downlink transmitter is coupled to the downlink antenna 212 and the uplink receiver circuit is coupled to the uplink antenna 232 for receiving transmissions over the wireless transmission link 250. Conversely, the operation of the two transceivers 210 and 230 can be time-coordinated so that the uplink transmitter is coupled to the uplink antenna 232 at the same time that the downlink receiver is coupled to the downlink antenna 212 for receiving transmissions over the wireless transmission link 250. In some embodiments, there is a cutoff time synchronization with a minimum guard time between changes in duplex direction.

[0029] The UE transceiver 230 and the base station transceiver 210 are configured to communicate over a wireless data communication link 250 and to cooperate with a appropriately configured RF antenna arrangement 212 / 232 that can support specific wireless communication protocols and modulation schemes. In some exemplary embodiments, the UE transceiver 210 and the base station transceiver 210 are configured to support industry standards such as Long-Term Evolution (LTE) and emerging 5G standards. However, it should be understood that this disclosure is not necessarily limited to specific standards and associated protocols in its application. Rather, the UE transceiver 230 and the base station transceiver 210 may be configured to support alternative or additional wireless data communication protocols, including future standards or variations thereof.

[0030] According to various embodiments, BS202 may be, for example, an evolved node B (eNB), a serving eNB, a target eNB, a femto station, or a pico station. In some embodiments, UE204 may be embodied in various types of user devices such as mobile phones, smartphones, personal digital aids (PDAs), tablets, laptop computers, and wearable computing devices. Processor modules 214 and 236 may be implemented or realized using general-purpose processors, associative memories, digital signal processors, application-specific integrated circuits, field-programmable gate arrays, any suitable programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. In this manner, the processor may be realized as a microprocessor, controller, microcontroller, state machine, etc. The processor may also be implemented as a combination of computing devices, for example, a combination of a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors working in conjunction with a digital signal processor core, or any other such configuration.

[0031] Furthermore, steps of methods or algorithms described in relation to embodiments disclosed herein can be directly embodied in hardware, firmware, software modules executed by processor modules 214 and 236, respectively, or any practical combination thereof. Memory modules 216 and 234 can be implemented as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the art. In this regard, memory modules 216 and 234 can be coupled to processor modules 210 and 230, respectively, so that processor modules 210 and 230 can read information from and write information to memory modules 216 and 234, respectively. Memory modules 216 and 234 may also be integrated into processor modules 210 and 230, respectively. In some embodiments, memory modules 216 and 234 may each include cache memory for storing temporary variables or other intermediate information during the execution of instructions to be executed by processor modules 210 and 230, respectively. Each of the memory modules 216 and 234 may include non-volatile memory for storing instructions executed by the processor modules 210 and 230, respectively.

[0032] The network communication module 218 generally represents hardware, software, firmware, processing logic, and / or other components of the base station 202 that enable bidirectional communication between the base station transceiver 210 and other network components and communication nodes configured to communicate with the base station 202. For example, the network communication module 218 may be configured to support Internet or WiMAX traffic. In a typical deployment, but not limited to, the network communication module 218 provides an 802.3 Ethernet® interface so that the 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 connecting to a computer network (e.g., a mobile switching center (MSC)). The terms “configured for,” “configured,” and their inflections as used herein for a specified operation or function refer to a device, component, circuit, structure, machine, signal, etc., that is physically structured, programmed, formatted, and / or arranged to perform a specified operation or function.

[0033] The Open System Interconnection (OSI) model (hereinafter referred to as the “Open System Interconnection Model”) is a conceptual and logical layout that defines network communications used by systems (e.g., wireless communication devices, wireless communication nodes) that are open to interconnection and communication with other systems. The model is divided into seven sub-components or layers, each representing a conceptual set of services provided to its upper and lower layers. The OSI model also defines logical networks and effectively describes computer packet forwarding by using different layer protocols. The OSI model may also be referred to as the 7-layer OSI model or the 7-layer model. In some embodiments, the first layer may be the physical layer. In some embodiments, the second layer may be the medium access control (MAC) layer. In some embodiments, the third layer may be the radio link control (RLC) layer. In some embodiments, the fourth layer may be the packet data convergence protocol (PDCP) layer. In some embodiments, the fifth layer may be the radio resource control (RRC) layer. In some embodiments, the sixth layer may be the Non-Accessible Layer (NAS) layer or the Internet Protocol (IP) layer, and the seventh layer may be any other layer.

[0034] Various exemplary embodiments of this solution are described below with reference to the accompanying drawings to enable those skilled in the art to create and use this solution. As will be apparent to those skilled in the art, after reading this disclosure, various changes or modifications can be made to the examples described herein without departing from the scope of this solution. Thus, this solution is not limited to the exemplary embodiments and uses described and illustrated herein. In addition, the particular order or hierarchy of steps in the methods disclosed herein is merely an exemplary approach. Based on design preferences, the particular order or hierarchy of steps in the disclosed methods or processes can be rearranged while remaining within the scope of this solution. Thus, those skilled in the art will understand that the methods and techniques disclosed herein present various steps or operations in a sample order, and this solution is not limited to the specific order or hierarchy presented unless otherwise specified. (2. Systems and methods for carrier phase positioning)

[0035] The demand for positioning is increasing. For example, in parking lots (especially underground parking lots), it can sometimes be difficult to find a car (especially during peak hours). Fifth-generation mobile communication systems (e.g., 5G, new radio access technologies, or 5G-NR) may provide a method for positioning on the radio side (e.g., a positioning reference signal (PRS from a base station (e.g., gNB)) and / or a sounding reference signal (SRS from a user equipment (UE))). However, the positioning accuracy of existing 5G-NR-based positioning solutions may not be sufficiently high (e.g., 1 meter or worse). In some harsh environments (e.g., densely populated urban areas), the positioning accuracy of existing 5G-NR-based positioning solutions may be even worse. Some commercial applications may require a positioning accuracy of 0.2 meters. In some cases, the target of some commercial applications (e.g., 0.2 meters) may be difficult to achieve with existing 5G-NR-based positioning solutions. This disclosure relates to improving positioning accuracy for 5G-NR-based positioning, including but not limited to using carrier phase positioning (CPP).

[0036] This disclosure relates to wireless communication for improving positioning accuracy in 5G-NR-based positioning. In the downlink (DL) as shown in Figure 3, a positioning reference signal (PRS) can be transmitted by one or more gNBs. Multiple gNBs (e.g., three base stations) can be involved to achieve “good” positioning accuracy. A UE can measure at least one PRS. The UE can report (one or more) measurement results to the network (e.g., a core network (CN) or a location management function (LMF) in a 5G CN (5GC)). Network elements may include at least one of a gNB, CN, or UE.

[0037] In an uplink (UL) as shown in Figure 4, a sounding reference signal (SRS) can be transmitted by the UE. One or more gNBs (e.g., multiple gNBs) may measure the SRS. One or more gNBs may report (one or more) measurement results to a network (e.g., LMF).

[0038] PRS and / or SRS transmissions for positioning purposes can be easily affected by the radio propagation environment (e.g., fading, distortion). Therefore, positioning accuracy can be limited. This disclosure can provide a method for higher positioning accuracy.

[0039] In Figure 5, radio waves can travel from a transmitter to a receiver with multiple wavelengths. For all wavelengths, the corresponding carrier phase (or carrier phase difference between the transmitter and receiver) can be 2π (equivalently, phase 0). For some wavelengths, the corresponding carrier phase can be a value within (0, 2π). If the carrier phase can be measured (and assuming no noise interference, and a line of sight (LOS) between the transmitter and receiver), the distance (D) between the transmitter and receiver is:

number

[0040] In some embodiments, if the UE can measure the carrier phase (e.g., Φ, N, or Φ+N, where N can be explored by a particular algorithm), the distance between the transmitter and receiver can be determined. In certain embodiments, the integer N may not be directly "measured" (e.g., it may be inferred with the smallest possible error), so only the fractional part (Φ) of the carrier phase can be referenced. (Implementation example 1:)

[0041] A wireless communication node (e.g., a UE, base station, or transmit / receive point (TRP)) may support positioning using multiple carriers (e.g., positioning frequency layers (PFLs)) containing transmitted and received radio signals for positioning. Each carrier / PFL can be measured / reported using carrier phase (CP) or differential CP.

[0042] In some embodiments, the UE / TRP can measure / report the CP using a carrier / PFL list. This carrier / PFL list can be at least one of the following: reference signal ID (e.g., PRS-ID, SRS-ID), reference signal resource ID (e.g., PRS resource ID, SRS resource ID), reference signal resource set ID (e.g., PRS resource set ID, SRS resource set ID), physical cell ID (PCI), global cell ID (CGI), absolute radio frequency channel number (ARFCN), subframe offset, CP value of the reference signal on the carrier / PFL, or PRS point A. The PCI ID can be a value between 0 and 1007. The subframe offset can be between one TRP and a reference TRP. In some embodiments, the CP value can be a difference value relative to the reference TRP (or reference PRS resource). PRS point A can be where the PRS starts at frequency. Alternatively, an offset can be added to PRS point A.

[0043] A jointed CP value from multiple carriers / PFLs is possible. Alternatively, the jointing process may involve adding / subtracting CP values ​​from multiple carriers / PFLs. The jointing process may involve measuring CP on a joint of two or more carriers / PFLs. For example, for two consecutive 100MHz carriers / PFLs, the bandwidth of this jointed carrier / PFL can be 200MHz. A CP measurement can be performed on this 200MHz jointed carrier / PFL. Alternatively, the reference signal resources in these carriers / PFLs of the jointed carrier / PFL may be the same or different.

[0044] A timestamp may be attached when the UE measures / reports a CP value. The timestamp may be useful in determining the approximate UE location (e.g., an integer range). A carrier / PFL list (or cell list, or serving cell list) may contain multiple carriers / PFLs. A PRS processing window (PPW) / measurement gap (MG) may be configured for each carrier / PFL. A PPW may be configured for all carriers / PFLs in the carrier / PFL list (e.g., this PPW may be shared by multiple carriers / PFLs). CP values ​​may be measured / reported when the UE measures / reports timing-related values ​​(e.g., arrival time difference (TDOA), round-trip time (RTT), multi-RTT, or reference signal time difference (RSTD)). CP values ​​may be measured / reported when the UE measures / reports angle-related values ​​(e.g., departure angle (AoD), arrival angle (AoA), RSRP measurement, or RSRPP measurement).

[0045] In some embodiments, a wireless communication node (e.g., UE, gNB, or TRP) can indicate (e.g., dynamically) which carriers / PFLs are measured together (e.g., CP values ​​can be measured over a wide bandwidth after aggregation of two or more carriers). For example, there may be three carriers / PFLs. If the first and second carriers / PFLs are measured together, but the third carrier / PFL is not, the UE can indicate the first and second carriers / PFLs to be processed together. In some embodiments, when a wireless communication node (e.g., UE, gNB, or TRP) reports CP values ​​to the LMF, the wireless communication node can indicate which CP values ​​are measured over a single carrier / PFL or multiple carriers / PFLs (e.g., using a carrier / PFL list). In some embodiments, when a wireless communication node (e.g., UE, gNB, or TRP) reports CP values ​​to the LMF, the wireless communication node can indicate which CP values ​​are measured over one individual carrier / PFL or multiple jointed carrier / PFLs (e.g., true or false indication by carrier / PFL list). This method allows the position calculation end (e.g., LMF) to calculate the UE's position more accurately.

[0046] A carrier / PFL list is possible. Carrier / PFLs within a carrier / PFL list can be measured / determined together. The CP value can be measured at the center of the carrier / PFL. For the joint processing of multiple carrier / PFLs, the CP value can be measured at the center of the carrier / PFL joint. For example, for the joint processing of two carrier / PFLs at 2000MHz~2100MHz (with a 100MHz bandwidth) and 2100MHz~2200MHz (with a 100MHz bandwidth), the CP value can be measured at the center of the joint of these two carriers (e.g., 2100MHz). As another example, for the joint processing of two carrier / PFLs at 2000MHz~2100MHz (with a 100MHz bandwidth) and 2100MHz~2160MHz (with a 60MHz bandwidth), the CP value can be measured at the center of the joint of these two carriers (e.g., 2080MHz). Alternatively, if the CP value is measured at the joint of these two carriers, the timing-based measurement (e.g., TDOA, RTT, or RSTD) may also be measured at the joint of these two carriers. Alternatively, if the timing-based measurement (e.g., TDOA, RTT, or RSTD) is measured at the joint of these two carriers, the CP value may also be measured at the joint of these two carriers. Alternatively, if the timing-based measurement (e.g., TDOA, RTT, or RSTD) is measured at the joint of these two carriers, the CP value may also be measured at the center of the joint of these two carriers.

[0047] If the UE consists of multiple carriers, one or more carriers may be deactivated (or released). If one carrier is released, the UE may measure / determine the CP for this carrier as well. Alternatively, if one carrier is released, the UE may measure the CP for the joint between this carrier and the other active carriers (e.g., a 100MHz + 100MHz = 200MHz bandwidth, a 200MHz bandwidth joint). Alternatively, if one carrier is released, the UE may measure the CP for the joint between this carrier and the other released carriers.

[0048] In some embodiments, CP measurements can be used for the phase calibration of the transmitter / receiver. For example, if the positioning reference unit (PRU) receiver phase is already calibrated, the LMF can utilize the CP measurements from the PRU and the geographic coordinates of the gNB and PRU for PRS transmission phase calibration.

[0049] In some embodiments, the differential CP measurement between two carrier waves / PFLs can be measured / reported. Optionally, the differential CP measurement between two carrier waves / PFLs can be measured / reported using the carrier ID (or a list of carriers). Optionally, the differential CP measurement between two carrier waves / PFLs can be measured / reported using the carrier frequency. Optionally, the differential CP measurement between two carrier waves / PFLs can be measured / reported using the virtual carrier wavelength λ v The difference CP measurement between two carriers / PFLs can be measured / reported using the formula =1 / (c / f1-c / f2), where c is the speed of light, f1 is the center frequency of the first carrier, and f2 is the center frequency of the second carrier. In some embodiments, the difference CP measurement between two carriers / PFLs can be measured / reported using ARFCN. This method can eliminate the phase error caused by the delay between the two carriers.

[0050] In some embodiments, the differential CP measurement value between two sub-carriers can be measured and reported. Optionally, the differential CP measurement value between two sub-carriers can be measured and reported using the frequency gap (e.g., the number of sub-carriers) between these two sub-carriers. By this method, the virtual integer can be within 0 or a very small range (e.g., 0 - 10).

[0051] In some embodiments, the differential CP measurement value between two carriers can be measured and reported using the frequency gap (e.g., 100 MHz) between these two carriers / PFLs. By this method, in a specific scenario (e.g., indoor factory), the virtual integer can be within a very small range (e.g., 0 - 30).

[0052] By this method, the position calculation end (e.g., LMF) can select an appropriate carrier / PFL for position calculation. Therefore, the positioning performance can be improved. (Implementation Example 2:)

[0053] CP measurement can be performed within a certain period. If the PRS collides with other high-priority signals, this CP measurement may not be completed within a predetermined period (e.g., 10 ms. Since the UE has to wait for the next PRS opportunity for measurement).

[0054] In some embodiments, CP measurement can be performed over the same measurement period of timing-based measurements (e.g., TDOA, RSTD, RTT, or multi-RTT). A CP-specific measurement period can exist. This CP-specific measurement period for all configured carriers / PFLs can be associated with at least one of the following: the number of carriers / PFLs (L), the CP measurement period (T CP,i ) for a single carrier / PFL, the effective reception time (T effect), the number of beams to be received (e.g., one beam for frequency range 1 (FR1), eight beams or 64 beams for FR2), the number of resources to be measured within a time slot, the number of samples within the measurement period (e.g., four for normal measurements, two or one for relaxation measurements), the number of (simultaneous) PPW / MGs configured for the UE, the number of paths (K) in the CP measurement, the scaling factor (SF) (e.g., 1.0-2.0) when the CP is measured together with a timing-based measurement (e.g., TDOA, RSTD, RTT, or multi-RTT), or the scaling factor (SF) (e.g., 1.0-3.0) when the CP is measured together with an angle-based measurement (e.g., reference signal received power (RSRP) or reference signal received path power (RSRPP)). For example, SF can be 1.5 times the TDOA measurement period. For example, SF can be 2 times the RSRPP measurement period.

[0055] In some embodiments, the CP-specific measurement period (T) for all configured PFLs. CP、Total )teeth

number

[0056] In some embodiments, the CP-specific measurement period (T) for all configured PFLs. CP、Total ) can be as follows (for example, for the operation of differential CP measurement):

number

[0057] CP-specific measurement period (T) for all configured PFLs CP、Total ) could be as follows:

[0058]

number

[0059]

number

[0060] SF can be the scaling factor (e.g., 1.3). RSTD,i This can be the measurement period for RSTD for PFL.

[0061]

number

[0062] In some embodiments, the CP-specific measurement period (T) for all configured PFLs. CP、Total )teeth

number

[0063] A PRS processing window (PPW) (or measurement gap (MG)) may be configured for the UE for CP measurement of the PRS. If the priority of the PRS is lower than other DL signals / channels within the PPW, the UE may drop the PRS without performing a CP measurement.

[0064] The UE may report its capability for CP measurement under the Radio Resource Control (RRC) inactive state (RRC_Inactive, i.e., its capability for CP measurement under RRC_Inactive). Optionally, the UE may report its capability for CP measurement under the RRC_Connect state. Optionally, when the UE reports its capability for timing-based measurements (e.g., TDOA, RSTD, RTT, or multi-RTT), the UE may also report its capability for CP measurement. Optionally, when the UE reports its capability for CP measurement, the UE may also report its capability for timing-based measurements. Optionally, capability for CP measurement may be associated with capability for timing-based measurements.

[0065] In some embodiments, with respect to a low-capacity (RedCap) UE, the UE may report a change in complexity when it supports a certain capability. Optionally, with respect to a RedCap UE, the UE may report a change in complexity when it supports CP measurement (for example, the complexity change rate R = New_Complexity / Old_Complexity, where New_Complexity can be the new complexity after supporting CP measurement, and Old_Complexity can be the complexity without supporting CP measurement. Complexity can be expressed in terms of the number of calculations (e.g., 50,000 additions)). Optionally, with respect to RedCap UEs, when a UE supports frequency hopping, it can report a change in complexity (for example, the complexity change rate R = New_Complexity / Old_Complexity, where New_Complexity can be the new complexity after supporting frequency hopping, and Old_Complexity can be the complexity without supporting frequency hopping). Frequency hopping can exceed the UE's maximum bandwidth, e.g., 20 MHz. Frequency hopping can occur from one 20 MHz bandwidth to another).

[0066] The CP measurement reporting delay may include the time used for the CP measurement. The CP measurement reporting delay may include the time used for the CP measurement in the time domain (including the extraction of the first path). Optionally, the CP measurement reporting delay may include the time used for the CP measurement in the frequency domain (including CP measurements for multiple subcarriers (e.g., three center subcarriers), and CP measurements for multiple segments of a carrier wave (e.g., four segments)). Optionally, the CP measurement reporting delay may be an addition to that of a timing-based measurement (e.g., TDOA).

[0067] In some embodiments, when CP measurement is performed under timing-based measurement (e.g., TDOA), there may be a scaling factor for the timing-based measurement period (e.g., 1.0 to 2.0 times that of the timing-based measurement). In some embodiments, when CP measurement is associated with timing-based measurement (e.g., TDOA), there may be a scaling factor for the timing-based measurement period (e.g., 1.0 to 2.0 times that of the timing-based measurement period). In some embodiments, when CP measurement is performed under timing-based measurement (e.g., TDOA) under RRC_Inactive, there may be another scaling factor for the timing-based measurement period (e.g., 1.0 to 1.5 times that of the timing-based measurement period).

[0068] In some embodiments, when CP measurement is performed under reference signal received power (RSRP) based measurements (e.g., per-path RSRP, RSRPP, e.g., angle-related measurements, e.g., RSTD measurements), the CP measurement period may be related to the number of paths (e.g., multiples of paths).

[0069] In some embodiments, if there are multiple PRS resources for measurement within a measurement period (e.g., within a CP measurement period, e.g., within a PPW), the UE may select one or more PRS resources for CP measurement, but the total measurement may not exceed its capacity for CP measurement. Optionally, there may be UE capability limits regarding PRS resources for CP measurement (e.g., two resource sets per TRP per PFL, one PRS resource per set). Optionally, there may be UE capability limits regarding PRS resources per bandwidth for CP measurement (e.g., 1, 2, ..., 256 resource sets per bandwidth, possible with different values ​​for FR1 and FR2). Optionally, there may be UE capability limits regarding PRS resources per combination per bandwidth for CP measurement (e.g., 1, 2, ..., 256 resource sets per bandwidth combination). Capability limits may be reported by the UE (in the UE capability report). Optionally, there may be UE capability limits regarding the duration of PRS processed symbols for CP measurement (e.g., 0.0625, 0.125, 0.25, ..., 100 ms). Optionally, there may be a scaling factor in the CP intrinsic period (e.g., 1.0-2.0). Optionally, there may be UE capability limits regarding the duration of PRS processed symbols per Tms for CP measurement (e.g., T=4, 8, ..., 2560 ms). Optionally, there may be a scaling factor in the CP intrinsic period (e.g., 1.0-1.5).

[0070] If any action (e.g., time alignment, time adjustment, time adjustment, handover) during the measurement period (e.g., within the CP measurement period) could cause inaccuracies (or changes) in the CP measurement, the UE may restart the CP measurement. Optionally, if any action could cause inaccuracies (or changes) in the CP measurement, the UE may continue the current CP measurement.

[0071] If one or more PRS symbols are dropped while measuring CP during a measurement period (e.g., within a CP measurement period) (e.g., due to a lower PRS priority), the UE can resume CP measurement. If one or more PRS symbols are dropped while measuring CP during a measurement period, the UE's sample size for this period can be increased (e.g., by one).

[0072] If a CP measurement operation occurs over two sampling durations during the measurement period (e.g., within the CP measurement period), the UE may resume the CP measurement. Optionally, if a CP measurement operation occurs over two sampling durations, the UE may continue the ongoing CP measurement. Optionally, if a CP measurement operation occurs over two sampling durations, the UE may increase the number of samples taken during this period (e.g., by 2).

[0073] If the time span of a PRS resource instance is greater than the UE's capacity, the UE may omit the CP measurement for this PRS resource. Optionally, if the time width of a PRS resource instance is greater than the UE's capacity, the UE may continue the CP measurement for this PRS resource. Optionally, if the time width of a PRS resource instance is greater than the UE's capacity, the UE may continue the CP measurement for this PRS resource, provided it is within the time width indicated by the UE. If the PRS has a lower priority than other signals / channels (within the PPW) when performing the CP measurement, the UE may continue the CP measurement for this PRS resource.

[0074] This method allows for more accurate measurement of the CP (Point of Convergence). Therefore, positioning performance can be improved by using accurate CP values. (Implementation example 3:)

[0075] As shown in Figure 6, the UE can calculate its location within a single site.

[0076] The LMF can configure a gNB with PRS resources (e.g., one PRS resource for one antenna of a gNB / TRP). The gNB can broadcast its position coordinates (x0, y0) (e.g., on the System Information Block (SIB)) and transmit PRS. Incidentally, the gNB's position coordinates (x0, y0) can also be transmitted to the UE by the LMF.

[0077] The UE may receive the position coordinates and PRS of the gNB. The UE may calculate AoA / AoD(α) using one or more PRS resources. The UE may calculate the distance d = ΔΦ * λv between the UE itself and the gNB. λv = 1 / (1 / λ1 - 1 / λ2). ΔΦ = Φ1 - Φ2. λv can be a virtual wavelength. λ1 can be the wavelength for frequency #1. λ2 can be the wavelength for frequency #2. Φ1 may be the CP measured for frequency #1. Φ2 may be the CP measured for frequency #2. The integer parts for frequency #1 and frequency #2 may be the same (when ΔN = 0).

[0078] UE can calculate its position coordinates (x, y): x = x0 + ΔΦ*λv*cos(α), y = y0 + ΔΦ*λv*sin(-α).

[0079] Multiple gNBs may be included to improve positioning accuracy (e.g., by averaging, filtering, and / or optimizing from multiple measurement results). In this way, the UE can determine its own position by CP measurements. (Implementation example 4:)

[0080] As illustrated in Figure 7, a UE can calculate its position within a single site with the help of a positioning reference unit (PRU), which may be similar to the UE and have a known or fixed position.

[0081] The LMF can configure the TRP / gNB with PRS resources (e.g., one PRS resource for one antenna of the gNB / TRP). The PRU can broadcast its position coordinates (x0, y0) (e.g., broadcast or SIB). In certain embodiments, the PRU can broadcast its position coordinates over a sidelink between UEs. Incidentally, the PRU's position coordinates (x0, y0) can also be forwarded to the UE by the LMF. The gNB can transmit PRS.

[0082] The UE may receive the PRS of the PRU's position coordinates (x0, y0) and gNB. The PRU may calculate AoA / AoD(β) using one or more PRS resources. The PRU may broadcast the AoA / AoD(β) value. Furthermore, the AoA / AoD(β) value can be forwarded to the UE by the LMF. The UE may calculate AoA / AoD(α) using one or more PRS resources and receive the AoA / AoD(β) value. The UE may then calculate the angle ∠UE_TRP_PRU=β-α.

[0083] The distance between UE itself and gNB is d = ΔΦ1 * λ v It is possible to calculate λ. v =1 / (1 / λ1-1 / λ2)ΔΦ1 can be the difference CP that can be broadcast by the PRU. The PRU is the distance d2=ΔΦ2*λ between itself and the gNB. v It is possible to calculate ΔΦ2. ΔΦ2 can be the difference CP. PRU is the value d2 = ΔΦ2 * λ v This can be broadcast. Incidentally, this value can be forwarded to the UE by the LMF. The UE has the value d2 = ΔΦ2 * λ v It can receive.

[0084] The distance d between the UE and the PRU is UE_PRU =sqrt((ΔΦ1*λ v )^2+(ΔΦ2*λ v )^2-2*ΔΦ1*λ v *ΔΦ2*λ v*cos(β-α)) can be calculated. UE can calculate the angle θ and α-θ. UE's position coordinates (x, y): x = x0 + ΔΦ*λ v *cos(α-θ), y=y0-ΔΦ*λ v *sin(α-θ) can be calculated.

[0085] Multiple gNBs can be included to improve positioning accuracy (e.g., by averaging, filtering, and / or optimizing from multiple measurement results). In this way, the UE can determine its own position by CP measurements with the help of the PRU. (Implementation example 5:)

[0086] If the radio waves from the transmitter do not move from the beam center, an antenna phase center offset (PCO) can occur. PCO can affect the accuracy of CP measurement. Therefore, positioning accuracy based on CP measurement can be affected. As a result, the PCO of the PRU can be addressed.

[0087] The PRU can transmit the SRS. The gNB / TRP can measure the carrier phase (CP) relative to the SRS. For example, the gNB / TRP can measure the CP relative to the SRS from 0 to 180 degrees with a resolution of 0.1 degrees. That is, there can be 180 / 0.1 = 1800 CP values ​​in different directions. The gNB / TRP can report these CP values ​​to the LMF. The LMF calculates the direction angle and distance of the PRU relative to the gNB / TRP. When the LMF calculates the position of the UE, it can adjust the CP (or PCO) by the direction angle and distance. The LMF can also forward the PCO to be adjusted to the PRU.

[0088] In some embodiments, the gNB / TRP may provide its PRS beam information (e.g., beam-related PRS ID) or spatial orientation information (e.g., 0° to 360°). The PRU may measure / report CP values ​​to the LMF based on the PRS beam information. Optionally, the PRU may measure / report PRS CP values ​​based on PRS beam information with a range (e.g., ±10°) and resolution (e.g., 0.05°, which could result in 2*10 / 0.05 = 400 CP values). Optionally, these CP values ​​may be reported with the corresponding orientation at the time of measurement. Optionally, these CP values ​​may be reported with the corresponding orientation at the time of measurement. These CP values ​​and corresponding orientations allow the LMF to adjust the PCO and obtain the correct CP values.

[0089] In some embodiments, the UE can report its PRS quasi-collocation (QCL) processing capability if requested by the LMF. Using this information, the gNB can configure a suitable PRS beam for the UE, and a suitable PRS beam can improve CP measurement accuracy, which can improve positioning accuracy for CP-based positioning.

[0090] In some embodiments, the LMF can constitute a PRS resource set in a TRP transmission timing error group (TEG, or Tx TEG) for a TRP / gNB. The PRS resource set may have several PRS resources (e.g., one for one antenna, a TEG may have several antennas). Under this configuration, the UE can simultaneously measure CP using timing-based measurements (e.g., TDOA) across the same PRS resources. Optionally, the UE can measure CP for the same TRP Tx TEG using timing-based measurements (e.g., TDOA) across the same PRS resources. This method allows for the measurement of carrier phase in fine directions, thus improving positioning performance. (Implementation example 6:)

[0091] A PRU can measure CP(Φ1) for PRS resources from a gNB / TRP. The PRU can report the CP to the LMF. However, a typical UE may not be aware of the CP(Φ1) measured by the PRU.

[0092] For single-difference (and double-difference) based CP positioning, CP measurements from the PRU can help eliminate the time offset between the UE and the gNB (and between gNBs), which can improve positioning accuracy.

[0093] In some embodiments, the PRU may report a phase error: abs(True_CP_Value-CP_Measured), where abs() is for abstraction, True_CP_Value is the true CP value (e.g., from its position and gNB position), and CP_Measured may be the CP measurement result. The PRU / UE can calculate and report the phase error from different antennas, PEG, and TEG to the / LMF.

[0094] In some embodiments, the UE / PRU can measure / report the Doppler frequency shift (or UE velocity) when measuring the CP. This can be used to reduce the phase error caused by the Doppler shift.

[0095] In some embodiments, the UE / PRU can measure / report the quality of the CP when measuring the CP. For example, the UE / PRU can measure the variance, standard deviation (STD), path loss, signal strength, RSRP, and / or RSRPP of the first path when measuring the CP (or differential CP).

[0096] For UE-based positioning (for example, a UE can calculate its own position), single-difference calculations (and double-difference calculations) can help improve positioning accuracy. Therefore, it is beneficial for a typical UE to know the CP(Φ1) measured by the PRU.

[0097] The UE can request the LMF to perform a CP measurement from the PRU. The request may include at least one of the following: its own approximate location (e.g., a few meters around its true location), serving gNB / TRP ID, PRS ID, PRS resource ID, PRS resource set ID, CP measurement by itself, or antenna reference point (ARP) ID. The ARP ID can be used to determine which ARP is selected.

[0098] After receiving the request, the LMF may transfer the best CP measurements from one or more PRUs. The transferred information may include at least one of the following: its own location (e.g., geographic coordinates), serving gNB / TRP ID, PRS ID, PRS resource ID, PRS resource set ID, or CP measurements from the PRU. The CP measurements may also be the CP measurement result and its corresponding location.

[0099] In some embodiments, a UE may transmit some kind of signal / channel to a gNB to request a CP measurement from a nearby PRU. After receiving the request, the gNB may request its serving PRU (or UE) to report the CP measurement results. After collecting the CP measurement results, the gNB may broadcast the collected CP measurement results from the PRU. The UE may receive the CP measurement results transmitted by its serving gNB.

[0100] In some embodiments, the UE can transmit some kind of sidelink signal / channel to a nearby PRU to request a CP measurement from the PRU. The PRU can respond with a CP measurement from itself. Optionally, the PRU can respond with a measured CP to a PRS from a gNB. Optionally, the PRU can respond with a measured CP to a sidelink PRS from the UE. Optionally, the PRU can respond with a measured CP to a sidelink PRS from a UE requesting a CP measurement. In this manner, UE-based positioning by CP measurement can be more accurate. Thus, positioning performance can be improved. (Implementation example 7:)

[0101] A UE can measure the CP value for a single PRS resource using a multiplexed receive (Rx) phase error group (PEG). A PEG may have one or more antennas. Optionally, a gNB / TRP can measure the CP value for a single SRS resource using multiple Rx PEGs. Optionally, a UE can measure the CP value for a single PRS resource from the same transmission (Tx) PEG using multiple Rx PEGs. Optionally, a gNB / TRP can measure the CP value for a single SRS resource from the same Tx PEG using multiple Rx PEGs.

[0102] The measurement end (e.g., UE, or gNB / TRP) may be required by the LMF to measure CP using Q (e.g., Q=1, 2, ..., 32) Rx PEGs against the same reference signal resource. Optionally, the measurement end can select which PEGs may be used to measure CP. Optionally, the UE may report the CP measurement results on CP-supported data (as required by the LMF).

[0103] The measurement end may be required by the LMF to tag CP measurements with a TEG (or TEG ID, e.g., 0, 1, 2, ..., 31, Tx TEG, RxTEG, Rx-Tx TEG). Optionally, the measurement end may be required by the LMF to associate CP measurements with a TEG (or TEG ID). Optionally, the measurement end may be required by the LMF to associate CP measurements with Rx time difference measurements (or Rx-Tx time difference measurements). Optionally, the measurement end may be required by the LMF to associate PEG in CP measurements with Rx time difference measurements (or Rx-Tx time difference measurements). Optionally, the measurement end may be required by the LMF to associate CP measurements with a TEG (or TEG ID) for timing-based measurements (e.g., TDOA, RSTD, or RTT). For example, a TEG that simultaneously measures CP measurements and timing-based measurements can be associated. Optionally, CP measurement results can be tagged with a TEG ID (i.e., which TEG measures this CP measurement result). Optionally, differential CP values ​​where the reference PEG is the first PEG (e.g., the PEG with ID=0, or the PEG at the first location in the PEG list) can be reported.

[0104] When the UE reports the CP measurement results, there may be an LOS / non-LOS (NLOS) indication for the CP measurement. Optionally, if the UE does not detect additional routes, there may be no LOS / NLOS indication (for example, only LOS by default). Optionally, when the UE measures the CP and does not detect additional routes, there may be an "no additional routes" indication. Optionally, when the UE measures the CP and does not detect additional routes, there may be an "empty" indication. When the UE measures the CP and does not detect additional routes, the additional route indication may be empty.

[0105] A Loss of Success (LOS) threshold (or Non-Loss of Success) may exist. If the LOS probability (e.g., 0.9) is higher than the LOS threshold (e.g., 0.6), the CP measurement result may be reported by the UE. If the LOS probability (e.g., 0.4) is lower than the LOS threshold (e.g., 0.7), the CP measurement result may not be reported by the UE.

[0106] In some embodiments, the LOS threshold can be a hard value (e.g., 0 for NLOS, 1 for LOS). If the LOS probability is 1 (i.e., 100%), the CP measurement result may be reported by the UE. Otherwise, the CP measurement result may not be reported by the UE.

[0107] In some embodiments, the confidence level of the LOS probability (e.g., 99%) may be high. Higher values ​​may be used to increase the reliability of the LOS accuracy. When the UE reports the CP measurement, the UE may also report the environment for the measurement (e.g., faulty areas, non-faulty areas, or mixed areas). This may be helpful in determining the LOS condition.

[0108] In some embodiments, there may be LOS / NLOS indicator granularity for CP measurement. It may be TRP-specific, PRS / SRS resource-specific, route-specific, route and PRS resource-specific, route and TRP-specific, or all of the above.

[0109] CP measurements can be subject to uncertainty (for example, values ​​smaller than 0.1 degrees or 0.001 Rad may indicate higher measurement accuracy and higher positioning accuracy).

[0110] In some embodiments, the UE can report Tx PEG-related information (e.g., SRS resource ID). The TRP / gNB can report Tx PEG-related information (e.g., PRS resource ID). Optionally, when measuring CP, the UE can measure / report the difference CP (or reference TRP) between TRP and serving TRP. Optionally, when measuring CP (e.g., signed 10-20 bits, with e.g., 1 / 2048 Rad resolution), the UE can measure / report the precision difference CP (or extended precision CP value) between TRP and serving TRP (or reference TRP).

[0111] When the UE reports a CP (or expected difference CP), the LMF can request a UE with the expected CP (or difference CP). In some embodiments, when the UE reports a CP (or difference CP), the LMF can request a UE with uncertainty in the expected CP (or expected difference CP uncertainty). This method allows for more accurate CP measurement, thus improving positioning performance.

[0112] It should be understood that one or more features from the above implementation examples are not limited to any particular implementation example, but can be combined in any way (for example, in any priority and / or order, simultaneously or otherwise).

[0113] Figure 5 illustrates a flowchart of Method 500 for carrier phase positioning. Method 500 can be implemented using any one or more of the components and devices detailed herein in relation to Figures 1 to 4. In summary, Method 500 can be performed by a wireless communication device (e.g., a UE) in some embodiments. Additional, fewer, or different operations may be performed in Method 500 depending on the embodiment. At least one aspect of the operation may involve a system, method, apparatus, or computer-readable medium.

[0114] A user device (UE) may receive configuration information for a reference signal for positioning from the network. This configuration information may include carrier phase-related (CP-related) information configured for the reference signal. The UE may perform CP measurements on the reference signal based on the CP-related information. The UE may transmit a report containing the CP measurement results to the network. The report may include a timestamp attached to the CP measurement results.

[0115] In some embodiments, configuration information may include PRS processing windows (PPWs) configured for multiple carriers within a positioning frequency layer (PFL). CP measurements may include CP values ​​when the UE reports timing-related information. CP measurements may include CP values ​​when the UE reports angle-related information. The UE may indicate which of the multiple carriers or PFLs should be measured together by the network.

[0116] In some embodiments, the report may indicate that the CP measurement is measured over a single PFL or over multiple PFLs. The CP measurement can be performed at the center of multiple PFLs (e.g., for joint processing of multiple PFLs). The CP measurement can be performed at the center of multiple carriers when the UE performs timing-based measurements for multiple carriers.

[0117] In some embodiments, CP measurements may be performed within a CP-specific period configured for all of the multiple PFLs. The CP-specific period may be associated with at least one of the number of PFLs, the CP measurement period for one of the PFLs, or the effective reception time of the PRS within the period. The CP-specific period may be defined as follows:

number

[0118] In some embodiments, CP measurements may be performed within a CP-specific period configured for all of the multiple PFLs. The CP-specific period may be associated with a scaling factor when the CP measurement is performed using a timing-based measurement. The CP-specific period may be defined as follows:

number

[0119] In some embodiments, the CP measurement may be performed within a CP-specific period configured for all of the multiple PFLs. The CP-specific period may be associated with a scaling factor when the CP measurement is performed using angle-based measurements. The UE may report its ability to perform CP measurements when the UE is in a Radio Resource Control (RRC) inactive state. The UE may restart the CP measurement when one or more symbols of the reference signal are dropped during the CP measurement. The UE may restart the CP measurement when it occurs over two sampling durations.

[0120] In some embodiments, a UE may receive the location of the second UE or a second CP measurement associated with the second UE from a second UE. The second UE may broadcast its location and the second CP measurement. The CP measurement may be performed relative to a reference signal with a certain direction and resolution. The CP measurement may be transmitted in a second report with a certain direction and resolution. The CP measurement may be performed on the same TRP Tx TEG in a timing-based measurement across the same PRS resource.

[0121] In some embodiments, a UE may send a request to a Location Management Function (LMF) with the help of a second UE (e.g., a Positioning Reference Unit (PRU)). The request may include at least one of the following: the approximate location of the UE, identification of a serving gNB / TRP, identification of a reference signal, identification of resources for the reference signal, or identification of a set of resources for the reference signal. The configuration information may include the results of a second CP measurement performed by the second UE. The results of the second CP measurement may include at least one of the following: the location of the second UE, identification of a serving gNB / TRP, identification of a second reference signal, identification of resources for the second reference signal, or identification of a set of resources for the second reference signal.

[0122] In some embodiments, the UE may receive a request from an LMF network entity to perform a CP measurement using QRx PEG against the same reference signal resource. The parameter Q may be an integer. The UE may receive a request from an LMF network entity to tag the CP measurement with a TEG ID. The report may include an LOS / NLOS indication for the CP measurement result. The report may include an LOS probability for CP measurement results that are higher than the LOS threshold.

[0123] In some embodiments, a wireless communication node may receive configuration information for a reference signal for positioning. The configuration information may include carrier phase-related (CP-related) information configured for the reference signal. The wireless communication node may perform CP measurements on the reference signal based on the CP-related information. The wireless communication node may transmit a report containing the CP measurement results. The wireless communication node may consist of multiple PRS resources. The wireless communication node may be configured to broadcast its location in a System Information Block (SIB). The report may include a differential CP value indicating which of several reference PEGs is the first PEG.

[0124] While various embodiments of the present solution have been described above, it should be understood that they are presented only as examples and not as limitations. Similarly, various figures may depict exemplary architectures or configurations, which are provided to enable those skilled in the art to understand the exemplary features and functions of the present solution. However, such those skilled in the art will understand that the present solution is not limited to the exemplary architectures or configurations described above and can be implemented using various alternative architectures and configurations. Furthermore, as will be understood by those skilled in the art, one or more features of one embodiment may be combined with one or more features of another embodiment described herein. Thus, the breadth and scope of this disclosure should not be limited by any of the exemplary embodiments described above.

[0125] It should be understood that any reference to elements in this specification using designations such as "first," "second," etc., does not generally limit the number or order of those elements. Rather, these designations may be used in this specification as a convenient means of distinguishing two or more elements or examples of elements. Thus, references to first and second elements do not mean that only two elements can be used, nor that the first element must precede the second element in any way.

[0126] Furthermore, those skilled in the art will understand that information and signals can be represented using any of the various different techniques and methods. For example, the data, instructions, commands, information, signals, bits, and symbols that may be mentioned in the above description can be represented by voltage, electric current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0127] Those skilled in the art will further understand that any of the various exemplary logic blocks, modules, processors, means, circuits, methods, and functions described in relation to the aspects disclosed herein may be implemented by electronic hardware (e.g., digital implementation, analog implementation, or a combination of both), firmware, various forms of programs or design code incorporating instructions (which may be referred to herein as “software” or “software modules” for convenience), or any combination of these techniques. To clearly illustrate this compatibility of hardware, firmware, and software, various exemplary components, blocks, modules, circuits, and steps are described above in general for their functionality. Whether such functionality is implemented as hardware, firmware, or software, or as a combination of these techniques, depends on the specific application and the design constraints imposed on the overall system. Those skilled in the art will understand that the described functionality may be implemented in various ways for each specific application, but such implementation decisions will not result in a departure from the scope of this disclosure.

[0128] Furthermore, those skilled in the art will understand that the various exemplary logic blocks, modules, devices, components, and circuits described herein may be implemented, or can be implemented, within an integrated circuit (IC) which may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, or any combination thereof. The logic blocks, modules, and circuits may further include antennas and / or transceivers for communicating with various components within a network or device. The general-purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, or state machine. The processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors working with a DSP core, or any other suitable configuration for performing the functions described herein.

[0129] When implemented in software, the functionality can be stored as one or more instructions or code on a computer-readable medium. Thus, steps of the methods or algorithms disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable medium includes both computer storage media and communication media, which include any media that can enable the transfer of computer programs or code from one location to another. Storage media can be any available medium that can be accessed by a computer. Such computer-readable media, but not limited to examples, may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and can be accessed by a computer.

[0130] In this specification, the term “module” as used herein refers to software, firmware, hardware, and any combination thereof for performing the relevant functions described herein. Furthermore, although various modules are described as individual modules for the purposes of consideration, as will be apparent to those skilled in the art, two or more modules may be combined to form a single module that performs the relevant functions according to embodiments of this solution.

[0131] Furthermore, communication components, as well as memory or other storage, may be used in embodiments of this solution. For clarity, it will be understood that the above description illustrates embodiments of this solution with reference to different functional units and processors. However, it will be clear that any appropriate distribution of functionality between different functional units, processing logic elements, or domains may be used without impairing the solution. For example, functionality exemplified as being performed by separate processing logic elements or controllers may be performed by the same processing logic element or controller. Thus, references to specific functional units are not to indicate a strict logical or physical structure or organization, but merely to appropriate means of providing the described functionality.

[0132] Various modifications to the embodiments described herein will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the embodiments shown herein, but should be given the broadest scope that coincides with novel features and principles disclosed herein, such as those set forth in the following claims.

Claims

1. A wireless communication method for positioning, wherein the wireless communication method is The user equipment (UE) receives configuration information for a reference signal for positioning from the network, wherein the configuration information includes carrier phase-related (CP-related) information configured for the reference signal. The UE performs CP measurement on the reference signal based on the CP-related information, When the UE reports timing-related information, the UE transmits a report containing CP measurement results to the network. Includes, A wireless communication method wherein the CP measurement result includes a CP value, and the timing-related information includes at least one of a reference signal time difference (RSTD) or a time difference between the reception and transmission of a signal by the UE.

2. The wireless communication method according to claim 1, wherein the report includes a timestamp associated with the CP measurement result.

3. The wireless communication method according to claim 1, wherein the report includes LOS / NLOS instructions for the CP measurement results.

4. The wireless communication method according to claim 1, wherein the CP measurement is applicable for a Wireless Resource Control (RRC) connected state, an RRC inactive state, or an RRC idle state.

5. A user device (UE) having at least one processor, wherein the at least one processor is The process involves receiving configuration information for a reference signal for positioning from a network via a transceiver, wherein the configuration information includes carrier phase-related (CP-related) information configured for the reference signal. Based on the CP-related information, a CP measurement is performed on the reference signal. When the UE reports timing-related information, it transmits the report containing the CP measurement results to the network via the transceiver. It is configured to do the following: The CP measurement result comprises a CP value, and the timing-related information includes at least one of a reference signal time difference (RSTD) or a time difference between the reception and transmission of the signal by the UE.

6. The UE according to claim 5, wherein the report includes a timestamp associated with the CP measurement result.

7. The UE according to claim 5, wherein the report includes LOS / NLOS indication for the CP measurement results.

8. The UE according to claim 5, wherein the CP measurement is applicable for a Radio Resource Control (RRC) connected state, an RRC inactive state, or an RRC idle state.

9. A wireless communication method for positioning, wherein the wireless communication method is The process involves transmitting configuration information of a reference signal for positioning from a network to a user device (UE), wherein the configuration information includes carrier phase-related (CP-related) information configured for the reference signal, and CP measurement is performed on the reference signal based on the CP-related information. When the UE reports timing-related information, the network receives a report from the UE that includes CP measurement results. Includes, A wireless communication method wherein the CP measurement result includes a CP value, and the timing-related information includes at least one of a reference signal time difference (RSTD) or a time difference between the reception and transmission of a signal by the UE.

10. The wireless communication method according to claim 9, wherein the report includes a timestamp associated with the CP measurement result.

11. The wireless communication method according to claim 9, wherein the report includes LOS / NLOS instructions for the CP measurement results.

12. The wireless communication method according to claim 9, wherein the CP measurement is applicable for a Radio Resource Control (RRC) connected state, an RRC inactive state, or an RRC idle state.

13. A network comprising at least one processor, wherein the at least one processor is The configuration information of a reference signal for positioning is transmitted to a user device (UE) via at least one transceiver, wherein the configuration information includes carrier phase-related (CP-related) information configured for the reference signal, and CP measurement is performed on the reference signal based on the CP-related information. When the UE reports timing-related information, the at least one transceiver receives a report from the UE that includes CP measurement results. It is configured to do the following: The CP measurement result comprises a CP value, and the timing-related information includes at least one of a reference signal time difference (RSTD) or the time difference between the reception and transmission of the signal by the UE.

14. The network according to claim 13, wherein the report includes a timestamp associated with the CP measurement result.

15. The network according to claim 13, wherein the report includes LOS / NLOS instructions for the CP measurement results.

16. The network according to claim 13, wherein the CP measurement is applicable for a Radio Resource Control (RRC) connected state, an RRC inactive state, or an RRC idle state.

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