Improved positioning configuration management in RRC inactive state

Abstract

Aspects presented herein may enhance positioning configuration management for a UE and / or a positioning entity when the UE is in an RRC inactive state. In one aspect, a UE performs a set of measurements associated with a plurality of DL signals from a first network entity, where the set of measurements is performed during an RRC inactive state of the UE. The UE sends a request for an updated configuration for a set of SRS positioning resources to the first network entity based on the measurement set for the plurality of DL signals. The UE receives an indication of the updated configuration for the set of SRS positioning resources based on the request.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Greek application serial number 20220100483 filed on June 10, 2022 and entitled “IMPROVED POSITIONING CONFIGURATION MANAGEMENT IN RRC INACTIVE STATE,” which application is expressly incorporated herein by reference in its entirety. Technical Field

[0003] The present disclosure relates generally to communication systems, and more particularly to communication systems with respect to positioning. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0005] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, or even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of the continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability, and other requirements (e.g., in the Internet of Things (IoT)). 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Certain aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. Further improvements to 5G NR technology are needed. These improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies. Summary of the invention

[0006] A simplified overview of one or more aspects is presented below to provide a basic understanding of these aspects. This summary is not an extensive review of all contemplated aspects. This summary is neither intended to identify key or important elements of all aspects, nor to describe the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to a more detailed description presented later.

[0007] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus performs a measurement set associated with a plurality of downlink (DL) signals from a first network entity, wherein the measurement set is performed during a radio resource control (RRC) inactive state of the UE. The apparatus sends a request for an updated configuration for a sounding reference signal (SRS) positioning resource set to the first network entity based on the measurement set for the plurality of DL signals. The apparatus receives an indication of the updated configuration for the SRS positioning resource set based on the request.

[0008] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus receives a request for an updated configuration for an SRS positioning resource set from a user equipment (UE), wherein the request for the updated configuration for the SRS positioning resource set is based on a measurement set associated with a plurality of DL signals. The apparatus sends an indication of at least one of: the updated configuration for the SRS positioning resource set or a configuration for a contention-free random access (CFRA) procedure at a second network entity.

[0009] To achieve the aforementioned and related purposes, one or more aspects include the features described in full below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail some exemplary features of one or more aspects. However, these features are only indicative of only some of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0011] Figure 2A is a diagram illustrating an example of a first frame according to various aspects of the present disclosure.

[0012] Figure 2B is a diagram illustrating an example of downlink (DL) channels within a subframe according to various aspects of the present disclosure.

[0013] Figure 2C is a diagram illustrating an example of a second frame according to various aspects of the present disclosure.

[0014] Figure 2D is a diagram illustrating an example of uplink (UL) channels within a subframe according to various aspects of the present disclosure.

[0015] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0016] Figure 4 is a diagram illustrating an example of UE positioning based on reference signal measurement.

[0017] Figure 5 is a communication flow illustrating an example multi-round trip time (multi-RTT) positioning process according to various aspects of the present disclosure.

[0018] Figure 6 is a diagram illustrating examples of different radio resource control (RRC) states in accordance with various aspects of the present disclosure.

[0019] Figure 7 The present invention is a communication flow illustrating an example in which a UE updates a positioning configuration in an RRC inactive state according to various aspects of the present disclosure.

[0020] Figure 8 is a communication flow illustrating an example of a UE updating a positioning configuration in an RRC inactive state after switching to a new base station according to various aspects of the present disclosure.

[0021] Fig. 9 is a flow chart of a method of wireless communication.

[0022] Fig.10 is a flow chart of a method of wireless communication.

[0023] Fig.11 are diagrams illustrating examples of hardware implementations for example apparatuses and / or network entities.

[0024] Fig.12 is a flow chart of a method of wireless communication.

[0025] Fig.13 is a flow chart of a method of wireless communication.

[0026] Fig.14 are diagrams illustrating examples of hardware implementations for example apparatuses and / or network entities. DETAILED DESCRIPTION

[0027] Various aspects presented herein may improve latency and efficiency of UE positioning. Various aspects presented herein may enhance positioning configuration management for UE and / or positioning entity (e.g., base station, location server, etc.) when the UE is in an RRC inactive state. For example, various aspects presented herein may enable the UE to request a positioning update during an RRC inactive state, such as requesting an updated configuration for its SRS transmission when there is a change in operating conditions at the UE. The UE may then apply the positioning update without transitioning to an RRC connected state.

[0028] The specific embodiments described below in conjunction with the accompanying drawings are descriptions of various configurations and do not represent the only configurations in which the concepts described herein can be practiced. In order to provide a thorough understanding of the various concepts, the detailed description includes specific details. However, these concepts can be practiced without these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid blurring these concepts.

[0029] Several aspects of the telecommunication system are also presented with reference to various apparatuses and methods. These apparatuses and methods are described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0030] For example, an element, or any part of an element, or any combination of elements can be implemented as a "processing system" including one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described in this disclosure. One or more processors in a processing system can execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other terms, software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, processes, functions, or any combination thereof.

[0031] Thus, in one or more example aspects, specific implementations and / or use cases, the described functionality may be implemented in hardware, software, or any combination thereof. If implemented in software, the functionality may be stored or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. Storage media may be any available media that can be accessed by a computer. For example, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of these types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0032] Although various aspects, specific implementations and / or use cases are described in this application by the illustration of some examples, additional or different aspects, specific implementations and use cases may be generated in many different arrangements and scenarios. The various aspects, specific implementations and / or use cases described herein can be implemented across many different platform types, devices, systems, shapes, sizes and packaging arrangements. For example, various aspects, specific implementations and / or use cases can be generated via integrated chip specific implementations and other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / purchase equipment, medical equipment, devices that enable artificial intelligence (AI), etc.). Although some examples may or may not be specifically for use cases or applications, the described examples may have a wide range of applicability. Various aspects, specific implementations and / or use cases can be in the range from chip-level or modular components to non-modular, non-chip-level specific implementations, and further to the range of aggregated, distributed or original equipment manufacturer (OEM) equipment or systems in conjunction with one or more technologies herein. In some practical environments, the equipment in conjunction with the various aspects and features described may also include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals necessarily include multiple components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.) The techniques described herein can be practiced in a wide variety of devices of various sizes, shapes, and configurations, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc.

[0033] The deployment of a communication system (such as a 5G NR system) can be arranged with various components or constituent parts in a variety of ways. In a 5G NR system or network, a network node, a network entity, a mobility element of a network, a radio access network (RAN) node, a core network node, a network element or a network equipment (such as a base station (BS) or one or more units (or one or more components) that perform base station functionality) can be implemented in an aggregated or decomposed architecture. For example, a BS (such as a Node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a transmit receive point (TRP) or a cell, etc.) can be implemented as an aggregated base station (also referred to as an independent BS or a monolithic BS) or a decomposed base station.

[0034] A converged base station may be configured to utilize a radio protocol stack physically or logically integrated within a single RAN node. A decomposed base station may be configured to utilize a protocol stack physically or logically distributed between two or more units, such as one or more central or centralized units (CUs), one or more distributed units (DUs), or one or more radio units (RUs). In some aspects, a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed in one or more other RAN nodes. A DU may be implemented to communicate with one or more RUs. Each of a CU, a DU, and a RU may be implemented as a virtual unit, i.e., a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit.

[0035] Base station operation or network design may take into account the aggregated nature of base station functionality. For example, a disaggregated base station may be used in an integrated access and backhaul (IAB) network, an open radio access network (O-RAN (network configuration such as that initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)). Decomposition may include distributing functionality across two or more units at various physical locations, as well as virtually distributing functionality of at least one unit, which may enable flexibility in network design. Individual units of a disaggregated base station or disaggregated RAN architecture may be configured for wired or wireless communication with at least one other unit.

[0036] Figure 11 is a diagram 100 illustrating an example of a wireless communication system and an access network. The illustrated wireless communication system includes a disaggregated base station architecture. The disaggregated base station architecture may include one or more CUs 110 that may communicate directly with a core network 120 via a backhaul link, or indirectly with a core network 120 through one or more disaggregated base station units, such as a near real-time (near RT) RAN intelligent controller (RIC) 125 via an E2 link, or a non-real-time (non-RT) RIC 115 associated with a service management and orchestration (SMO) framework 105, or both. The CU 110 may communicate with one or more DUs 130 via corresponding midhaul links, such as an F1 interface. The DU 130 may communicate with one or more RUs 140 via corresponding fronthaul links. The RU 140 may communicate with corresponding UEs 104 via one or more radio frequency (RF) access links. In some implementations, a UE 104 may be served simultaneously by multiple RUs 140.

[0037] Each of the units (i.e., CU 110, DU 130, RU 140, and near-RT RIC 125, non-RT RIC 115, and SMO framework 105) may include or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of these units or an associated processor or controller that provides instructions to the communication interface of these units may be configured to communicate with one or more of the other units via a transmission medium. For example, these units may include a wired interface configured to receive signals on a wired transmission medium or to transmit signals to one or more of the other units. Additionally, these units may include a wireless interface that may include a receiver, transmitter, or transceiver (such as an RF transceiver) configured to receive signals on a wireless transmission medium or to transmit signals to one or more of the other units, or both.

[0038] In some aspects, CU 110 may host one or more higher layer control functions. Such control functions may include radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), etc. Each control function may be implemented using an interface that is configured to communicate signals with other control functions hosted by CU 110. CU 110 may be configured to handle user plane functionality (i.e., central unit-user plane (CU-UP)), control plane functionality (i.e., central unit-control plane (CU-CP)), or a combination thereof. In some specific implementations, CU 110 may be logically divided into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RA configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU 110 may be implemented to communicate with DU 130 for network control and signaling.

[0039] DU 130 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 140. In some aspects, DU 130 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc.) depending at least in part on a functional split such as that defined by 3GPP. In some aspects, DU 130 may further host one or more low PHY layers. Each layer (or module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by DU 130 or with control functions hosted by CU 110.

[0040] The lower layer functionality may be implemented by one or more RUs 140. In some deployments, the RU 140 controlled by the DU 130 may correspond to a logical node that hosts RF processing functions or low PHY layer functions (such as performing fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, etc.), or both, based at least in part on functional partitioning (such as lower layer functional partitioning). In such an architecture, the RU 140 may be implemented to handle over-the-air (OTA) communications with one or more UEs 104. In some specific implementations, real-time and non-real-time aspects of control plane and user plane communications with the RU 140 may be controlled by the corresponding DU 130. In some scenarios, this configuration may enable the implementation of the DU 130 and the CU 110 in a cloud-based RAN architecture (such as a vRAN architecture).

[0041] The SMO framework 105 may be configured to support RAN deployment and provisioning of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 105 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 105 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 190) to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 110, DU 130, RU 140, and near-RT RIC 125. In some specific implementations, the SMO framework 105 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 111) via the O1 interface. In addition, in some specific implementations, the SMO framework 105 may communicate directly with one or more RUs 140 via the O1 interface. The SMO framework 105 may also include a non-RT RIC 115 configured to support the functionality of the SMO framework 105 .

[0042] The non-RT RIC 115 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence (AI) / machine learning (ML) (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 125. The non-RT RIC 115 may be coupled to or in communication with the near-RT RIC 125 (such as via an A1 interface). The near-RT RIC 125 may be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 110, one or more DUs 130, or both, and the O-eNB with the near-RT RIC 125.

[0043] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 125, the non-RT RIC 115 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 125 and may be received from a non-network data source or from a network function at the SMO framework 105 or the non-RT RIC 115. In some examples, the non-RT RIC 115 or the near-RT RIC 125 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 115 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 105 (such as via reconfiguration of O1) or via the creation of RAN management policies (such as A1 policies).

[0044] At least one of the CU 110, the DU 130, and the RU 140 may be referred to as a base station 102. Therefore, the base station 102 may include one or more of the CU 110, the DU 130, and the RU 140 (each component is indicated by a dotted line to indicate that each component may be included in the base station 102 or may not be included in the base station). The base station 102 provides an access point to the core network 120 for the UE 104. The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). Small cells include femto cells, pico cells, and micro cells. A network including both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved Node B (eNB) (HeNB), which may provide services to a restricted group referred to as a closed subscriber group (CSG). The communication link between RU 140 and UE 104 may include uplink (UL) (also referred to as reverse link) transmission from UE 104 to RU 140 and / or downlink (DL) (also referred to as forward link) transmission from RU 140 to UE 104. The communication link may use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmit diversity. The communication link may be through one or more carriers. For each carrier allocated in a carrier aggregation of up to Yx MHz (x component carriers) for transmission in each direction, the base station 102 / UE 104 may use a spectrum of up to Y MHz (e.g., 5 MHz, 10 MHz, 15 MHz, 20 MHz, 100 MHz, 400 MHz, etc.) bandwidth. The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated to DL compared to UL). The component carrier may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

[0045] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL wireless wide area network (WWAN) spectrum. The D2D communication link 158 may use one or more side link channels, such as a physical side link broadcast channel (PSBCH), a physical side link discovery channel (PSDCH), a physical side link shared channel (PSSCH), and a physical side link control channel (PSCCH). The D2D communication may be through a variety of wireless D2D communication systems, such as, for example, Bluetooth, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0046] The wireless communication system may also include a Wi-Fi AP 150 that communicates with a UE 104 (also referred to as a Wi-Fi station (STA)) via a communication link 154, for example, in a 5 GHz unlicensed spectrum, etc. When communicating in an unlicensed spectrum, the UE 104 / AP 150 may perform a clear channel assessment (CCA) to determine whether a channel is available prior to communication.

[0047] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). Although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the “sub-6 GHz” band in various documents and articles. A similar naming issue sometimes occurs with respect to FR2, which is often (interchangeably) referred to as the “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0048] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as frequency range designation FR3 (7.125 GHz–24.25 GHz). The bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and therefore can effectively extend the features of FR1 and / or FR2 to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operations to more than 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR2-2 (52.6 GHz–71 GHz), FR4 (71 GHz–114.25 GHz), and FR5 (114.25 GHz–300 GHz). Each of these higher frequency bands falls within the EHF band.

[0049] In view of the above, unless otherwise specifically stated, if the term "below 6 GHz" or the like is used in this document, it may broadly refer to frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. In addition, unless otherwise specifically stated, if the term "millimeter wave" or the like is used in this document, it may broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR2-2, and / or FR5, or may be within the EHF band.

[0050] The base station 102 and the UE 104 may each include multiple antennas (such as antenna elements, antenna panels, and / or antenna arrays) to facilitate beamforming. The base station 102 may send a beamformed signal 182 to the UE 104 in one or more transmit directions. The UE 104 may receive the beamformed signal from the base station 102 in one or more receive directions. The UE 104 may also send a beamformed signal 184 to the base station 102 in one or more transmit directions. The base station 102 may receive the beamformed signal from the UE 104 in one or more receive directions. The base station 102 / UE 104 may perform beam training to determine the best receive direction and the best transmit direction for each of the base station 102 / UE 104. The transmit direction and the receive direction of the base station 102 may be the same or different. The transmit direction and the receive direction of the UE 104 may be the same or different.

[0051] The base station 102 may include and / or be referred to as a gNB, a Node B, an eNB, an access point, a transceiver base station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmit receive point (TRP), a network node, a network entity, a network equipment, or some other suitable term. The base station 102 may be implemented as an integrated access and backhaul (IAB) node, a relay node, a sidelink node, an aggregated (monolithic) base station with a baseband unit (BBU) (including a CU and a DU) and a RU, or as a decomposed base station including one or more of a CU, a DU, and / or a RU. A set of base stations that may include decomposed base stations and / or aggregated base stations may be referred to as a next generation (NG) RAN (NG-RAN).

[0052] The core network 120 may include an access and mobility management function (AMF) 161, a session management function (SMF) 162, a user plane function (UPF) 163, a unified data management (UDM) 164, one or more location servers 168, and other functional entities. AMF 161 is a control node that processes signaling between UE 104 and the core network 120. AMF 161 supports registration management, connection management, mobility management, and other functions. SMF 162 supports session management and other functions. UPF 163 supports packet routing, packet forwarding, and other functions. UDM 164 supports the generation of authentication and key agreement (AKA) credentials, user identity processing, access authorization, and subscription management. One or more location servers 168 are illustrated as including a gateway mobile location center (GMLC) 165 and a location management function (LMF) 166. However, in general, the one or more location servers 168 may include one or more location / positioning servers, which may include one or more of the GMLC 165, the LMF 166, the positioning determination entity (PDE), the serving mobile location center (SMLC), the mobile positioning center (MPC), etc. The GMLC 165 and the LMF 166 support UE location services. The GMLC 165 provides an interface for clients / applications (e.g., emergency services) to access UE positioning information. The LMF 166 receives measurements and assistance information from the NG-RAN and the UE 104 via the AMF 161 to calculate the positioning of the UE 104. The NG-RAN may determine the positioning of the UE 104 using one or more positioning methods. Positioning the UE 104 may involve signal measurements, positioning estimates, and optional speed calculations based on these measurements. Signal measurements may be performed by the UE 104 and / or the serving base station 102. The measured signals may be based on a satellite positioning system (SPS) 170 (e.g., one or more of a global navigation satellite system (GNSS), a global positioning system (GPS), a non-terrestrial network (NTN), or other satellite positioning / location systems), LTE signals, wireless local area network (WLAN) signals, Bluetooth signals, a terrestrial beacon system (TBS), sensor-based information (e.g., an atmospheric pressure sensor, a motion sensor), an NR enhanced cell ID (NR E-CID) method, NR signals (e.g., multi-round trip time (multi-RTT), DL angle of departure (DL-AoD), DL time difference of arrival (DL-TDOA), UL time difference of arrival (UL-TDOA), and UL angle of arrival (UL-AoA) positioning), and / or one or more of other systems / signals / sensors.

[0053] Examples of UE 104 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet devices, smart devices, wearable devices, vehicles, electric meters, gas pumps, large or small kitchen appliances, healthcare equipment, implants, sensors / actuators, displays, or any other similarly functional devices. Some of the UEs in UE 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, toasters, vehicles, heart monitors, etc.). UE 104 may also be referred to as stations, mobile stations, user stations, mobile units, user units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile user stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or some other suitable terms. In some scenarios, the term UE may also be applied to one or more supporting devices, such as in a device cluster arrangement. One or more of these devices may access the network collectively and / or individually.

[0054] Refer again Figure 1 In some aspects, the UE 104 may be configured to: perform a set of measurements associated with a plurality of DL signals from a first network entity, wherein the set of measurements is performed during an RRC inactive state of the UE; send a request for an updated configuration for a set of SRS positioning resources to the first network entity based on the set of measurements for the plurality of DL signals; and receive an indication of the updated configuration for the set of SRS positioning resources via a positioning configuration update request component 198 based on the request. In some aspects, the base station 102 may be configured to: receive a request for an updated configuration for a set of SRS positioning resources from the UE, wherein the request for the updated configuration for the set of SRS positioning resources is based on a set of measurements associated with a plurality of DL signals; and send an indication of at least one of: the updated configuration for the set of SRS positioning resources or a configuration for a CFRA process at a second network entity via a positioning configuration update process component 199.

[0055] Figure 2A FIG200 is a diagram illustrating an example of a first subframe within a 5G NR frame structure. Figure 2B is a diagram 230 illustrating an example of DL channels within a 5G NR subframe. Figure 2C FIG250 is a diagram illustrating an example of a second subframe within a 5G NR frame structure. Figure 2Dis a diagram 280 illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure can be frequency division duplex (FDD) (wherein, for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to either DL or UL), or can be time division duplex (TDD) (wherein, for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to both DL and UL). Figure 2A , Figure 2C In the example provided, the 5G NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (most of which are DL), where D is DL, U is UL, and F is flexible between DL / UL, and subframe 3 is configured with slot format 1 (all of which are UL). Although subframes 3 and 4 are shown as having slot formats 1 and 28, respectively, any particular subframe can be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are DL and UL, respectively. Other slot formats 2-61 include a mix of DL, UL and flexible symbols. The slot format is configured for the UE by a received slot format indicator (SFI) (dynamically configured by DL control information (DCI) or semi-statically / statically configured by radio resource control (RRC) signaling). Note that the following description also applies to the 5G NR frame structure as TDD.

[0056] FIG. 2A to FIG. 2D The frame structure is illustrated, and various aspects of the present disclosure may be applicable to other wireless communication technologies that may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 subframes of the same size (1ms). Each subframe may include one or more time slots. A subframe may also include a microslot, which may include 7, 4, or 2 symbols. Each time slot may include 14 or 12 symbols, depending on whether the cyclic prefix (CP) is conventional or extended. For conventional CP, each time slot may include 14 symbols, and for extended CP, each time slot may include 12 symbols. The symbol on the DL may be a CP orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbol. The symbol on the UL may be a CP-OFDM symbol (for high throughput scenarios) or a discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbol (also known as a single carrier frequency division multiple access (SC-FDMA) symbol) (for power-limited scenarios; limited to single-stream transmission). The number of time slots within a subframe is based on the CP and parameter set. The parameter set defines the subcarrier spacing (SCS) and effectively defines the symbol length / duration, which is equal to 1 / SCS.

[0057]

[0058] For normal CP (14 symbols / slot), different parameter sets μ0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For extended CP, parameter set 2 allows 4 slots per subframe. Accordingly, for normal CP and parameter set μ, there are 14 symbols / slot and 2 μ timeslots / subframe. The subcarrier spacing can be equal to 2 μ *15kHz, where μ is parameter set 0 to 4. Therefore, the subcarrier spacing for parameter set μ=0 is 15kHz, and the subcarrier spacing for parameter set μ=4 is 240kHz. The symbol length / duration is inversely related to the subcarrier spacing. FIG. 2A to FIG. 2D An example of a parameter set μ=2 with a normal CP of 14 symbols per slot and 4 slots per subframe is provided. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is about 16.67 μs. Within a frame set, there may be one or more different bandwidth parts (BWPs) that are frequency-division multiplexed (see Figure 2B ). Each BWP can have a specific parameter set and CP (normal or extended).

[0059] A resource grid may be used to represent the frame structure. Each slot includes a resource block (RB) (also referred to as a physical RB (PRB)) extending over 12 consecutive subcarriers. The resource grid is divided into a plurality of resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0060] like Figure 2A As illustrated in FIG, some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include a demodulation RS (DM-RS) (indicated as R for one particular configuration, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0061] Figure 2BExamples of various DL channels within a subframe of a frame are illustrated. A physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE including six RE groups (REGs), each REG including 12 consecutive REs in an OFDM symbol of an RB. A PDCCH within a BWP may be referred to as a control resource set (CORESET). The UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., a common search space, a UE-specific search space) during a PDCCH monitoring opportunity on a CORESET, wherein the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at higher and / or lower frequencies on the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of a frame. The PSS is used by UE 104 to determine subframe / symbol time and physical layer identification. A secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also called SS block (SSB)). The MIB provides the system frame number (SFN) and the number of RBs in the system bandwidth. The physical downlink shared channel (PDSCH) carries user data, broadcast system information not sent over the PBCH (such as the system information block (SIB)), and paging messages.

[0062] like Figure 2C As illustrated, some of the REs carry DM-RS (indicated as R for a particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may send a DM-RS for a physical uplink control channel (PUCCH) and a DM-RS for a physical uplink shared channel (PUSCH). The PUSCH DM-RS may be sent in the first or first two symbols of the PUSCH. Depending on whether a short PUCCH or a long PUCCH is sent and depending on the specific PUCCH format used, the PUCCH DM-RS can be sent in different configurations. The UE may send a sounding reference signal (SRS). The SRS may be sent in the last symbol of a subframe. The SRS may have a comb structure, and the UE may send the SRS on one of the comb structures in the comb structure. The SRS may be used by the base station for channel quality estimation to achieve frequency-dependent scheduling of the UL.

[0063] Figure 2DExamples of various UL channels within a subframe of a frame are illustrated. The PUCCH may be located at a position as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), and hybrid automatic repeat request (HARQ) acknowledgement (ACK) (HARQ-ACK) feedback (i.e., one or more HARQ ACK bits indicating one or more ACKs and / or negative ACKs (NACKs)). The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0064] Figure 3 370 is a block diagram of a base station 310 in an access network communicating with a UE 350. In the DL, Internet Protocol (IP) packets may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression / decompression, security (encryption, decryption, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with transmission of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0065] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1 (which includes the physical (PHY) layer) may include error detection on the transmission channel, forward error correction (FEC) decoding / decoding of the transmission channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 processes the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-order phase shift keying (M-PSK), M-order quadrature amplitude modulation (M-QAM)). The decoded and modulated symbols can then be split into parallel streams. Subsequently, each stream can be mapped to an OFDM subcarrier, each stream is multiplexed with a reference signal (e.g., a pilot) in the time domain and / or frequency domain, and each stream is then combined together using an inverse fast Fourier transform (IFFT) to generate a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially pre-coded to generate multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation schemes, as well as for spatial processing. Channel estimates may be derived from reference signals and / or channel condition feedback sent by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318Tx. Each transmitter 318Tx may modulate a radio frequency (RF) carrier with a corresponding spatial stream for transmission.

[0066] At the UE 350, each receiver 354Rx receives a signal through its corresponding antenna 352. Each receiver 354Rx recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial stream destined for the UE 350. If multiple spatial streams are destined for the UE 350, they can be combined into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then converts the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier and the reference signal are recovered and demodulated by determining the signal constellation point most likely to be sent by the base station 310. These soft decisions can be based on channel estimates calculated by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by base station 310. The data and control signals are then provided to controller / processor 359, which implements layer 3 and layer 2 functionality.

[0067] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0068] Similar to the functionality described in conjunction with DL transmissions performed by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functionality associated with transmission of upper layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0069] Channel estimates derived by the channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by the TX processor 368 to select appropriate coding and modulation schemes and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354Tx. Each transmitter 354Tx may modulate an RF carrier with a corresponding spatial stream for transmission.

[0070] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318Rx receives a signal through its corresponding antenna 320. Each receiver 318Rx recovers information modulated onto an RF carrier and provides the information to the RX processor 370.

[0071] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover IP packets. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0072] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 The positioning configuration update request component 198 combines various aspects.

[0073] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform operations related to Figure 1 The positioning configuration update process component 199 combines various aspects.

[0074] Figure 4 4 is a diagram illustrating an example of UE positioning based on reference signal measurements (which may also be referred to as “network-based positioning”) according to various aspects of the present disclosure. UE 404 may be at time T SRS_TX UL-SRS 412 is sent and at time T PRS_RX A DL positioning reference signal (PRS) (DL-PRS) 410 is received. TRP 406 may be at time T SRS_RX Receive UL-SRS 412 and at time T PRS_TX 410. UE 404 may receive DL-PRS 410 before transmitting UL-SRS 412, or may transmit UL-SRS 412 before receiving DL-PRS 410. In both cases, a positioning server (e.g., location server 168) or UE 404 may determine the UL-SRS 412 based on ||T SRS_RX –T PRS_TX |–|T SRS_TX –T PRS_RX || determines RTT 414. Thus, multi-RTT positioning may utilize UE Rx-Tx time difference measurements (i.e., |T SRS_TX –T PRS_RX |) and DL-PRS reference signal received power (RSRP) (DL-PRS-RSRP), and the measured TRP Rx-Tx time difference measurement (ie, |T SRS_RX –T PRS_TX|) and UL-SRS-RSRP. The UE 404 measures the UE Rx-Tx time difference measurement (and / or the DL-PRS-RSRP of the received signal) using the assistance data received from the positioning server, and the TRP 402, 406 measures the gNB Rx-Tx time difference measurement (and / or the UL-SRS-RSRP of the received signal) using the assistance data received from the positioning server. These measurements may be used at the positioning server or the UE 404 to determine the RTT, which is used to estimate the position of the UE 404. Other methods for determining the RTT are possible, such as, for example, using DL-TDOA and / or UL-TDOA measurements.

[0075] PRS may be defined for network-based positioning (e.g., NR positioning) to enable UEs to detect and measure more neighboring transmit and receive points (TRPs), with multiple configurations supported to enable various deployments (e.g., indoor, outdoor, below 6, mmW, etc.). To support PRS beam operation, beam scanning may also be configured for PRS. The UL positioning reference signal may be based on a sounding reference signal (SRS) with enhancements / adjustments for positioning purposes. In some examples, the UL-PRS may be referred to as "SRS for positioning," and a new information element (IE) may be configured for SRS for positioning in RRC signaling.

[0076] DL PRS-RSRP may be defined as the linear average of the power contributions (in [W]) of the resource elements of the antenna ports carrying the DL PRS reference signal configured for RSRP measurement within the considered measurement frequency bandwidth. In some examples, for FR1, the reference point for DL ​​PRS-RSRP may be the antenna connector of the UE. For FR2, DL PRS-RSRP may be measured based on the combined signals from the antenna elements corresponding to a given receiver branch. For FR1 and FR2, if the UE uses receiver diversity, the reported DL PRS-RSRP value may not be lower than the corresponding DL PRS-RSRP of any individual receiver branch in the individual receiver branches. Similarly, UL SRS-RSRP may be defined as the linear average of the power contributions (in [W]) of the resource elements carrying the sounding reference signal (SRS). UL SRS-RSRP may be measured over the configured resource elements in the considered measurement frequency bandwidth, in the configured measurement occasions. In some examples, for FR1, the reference point for UL SRS-RSRP may be the antenna connector of the base station (gNB). For FR2, the UL SRS-RSRP may be measured based on the combined signals from the antenna elements corresponding to a given receiver branch. For FR1 and FR2, if the base station uses receiver diversity, the reported UL SRS-RSRP value may not be lower than the corresponding UL SRS-RSRP of any of the individual receiver branches.

[0077] The PRS-path RSRP (PRS-RSRPP) may be defined as the power of the linear average of the channel response at the i-th path delay of the resource element carrying the DL PRS signal configured for measurement, where the DL PRS-RSRPP for the 1st path delay is the power contribution corresponding to the first detected path in time. In some examples, the PRS path phase measurement may refer to the phase associated with the i-th path of the channel derived using the PRS resource.

[0078] DL-AoD positioning may utilize the measured DL-PRS-RSRP of downlink signals received from multiple TRPs 402, 406 at the UE 404. The UE 404 measures the DL-PRS-RSRP of the received signals using assistance data received from a positioning server, and the resulting measurements, along with the departure azimuth angle (A-AoD), departure zenith angle (Z-AoD), and other configuration information, are used to position the UE 404 relative to neighboring TRPs 402, 406.

[0079] DL-TDOA positioning may utilize DL reference signal time difference (RSTD) (and / or DL-PRS-RSRP) of downlink signals received from multiple TRPs 402, 406 at the UE 404. The UE 404 measures the DL RSTD (and / or DL-PRS-RSRP) of the received signals using assistance data received from a positioning server, and the resulting measurements are used along with other configuration information to position the UE 404 relative to neighboring TRPs 402, 406.

[0080] UL-TDOA positioning may utilize the UL relative time of arrival (RTOA) (and / or UL-SRS-RSRP) at multiple TRPs 402, 406 of uplink signals sent from the UE 404. The TRPs 402, 406 measure the UL-RTOA (and / or UL-SRS-RSRP) of the received signals using assistance data received from a positioning server, and the resulting measurements are used along with other configuration information to estimate the position of the UE 404.

[0081] UL-AoA positioning may utilize the measured azimuth angle of arrival (A-AoA) and zenith angle of arrival (Z-AoA) of uplink signals sent from the UE 404 at multiple TRPs 402, 406. The TRPs 402, 406 measure the A-AoA and Z-AoA of the received signals using assistance data received from the positioning server, and the resulting measurements, along with other configuration information, are used to estimate the position of the UE 404. For purposes of this disclosure, positioning operations in which a UE provides measurements to a base station / positioning entity / server for use in calculating the UE's positioning may be described as "UE-assisted," "UE-assisted positioning," and / or "UE-assisted positioning calculation," while positioning operations in which a UE measures and calculates its own positioning may be described as "UE-based," "UE-based positioning," and / or "UE-based positioning calculation."

[0082] Additional positioning methods may be used to estimate the position of the UE 404, such as, for example, UE-side UL-AoD and / or DL-AoA. Note that data / measurements from various techniques may be combined in various ways to increase accuracy, determine and / or enhance certainty, supplement / complete measurements, and / or replace / provide missing information.

[0083] It should be noted that the terms "positioning reference signal" and "PRS" generally refer to specific reference signals used for positioning in NR and LTE systems. However, as used herein, the terms "positioning reference signal" and "PRS" may also refer to any type of reference signal that can be used for positioning, such as but not limited to: PRS, TRS, PTRS, CRS, CSI-RS, DMRS, PSS, SSS, SSB, SRS, UL-PRS, etc. as defined in LTE and NR. In addition, the terms "positioning reference signal" and "PRS" may refer to downlink or uplink positioning reference signals, unless otherwise indicated by the context. If it is necessary to further distinguish the type of PRS, the downlink positioning reference signal may be referred to as "DL-PRS", and the uplink positioning reference signal (e.g., SRS, PTRS used for positioning) may be referred to as "UL-PRS". In addition, for signals that can be sent in both uplink and downlink (e.g., DMRS, PTRS), these signals may be prepended with "UL" or "DL" to distinguish the direction. For example, "UL-DMRS" can be distinguished from "DL-DMRS".

[0084] Figure 5 5 is a communication flow 500 illustrating an example multi-RTT positioning process according to various aspects of the present disclosure. The numbers associated with the communication flow 500 do not specify a particular time order and are merely used as a reference for the communication flow 500. In addition, DL-only and / or UL-only positioning may use one or more subsets of the multi-RTT positioning process.

[0085] At 510, LMF 506 may request one or more positioning capabilities from UE 502 (e.g., from a target device). In some examples, the request for one or more positioning capabilities from UE 502 may be associated with the LTE Positioning Protocol (LPP). For example, LMF 506 may request positioning capabilities of UE 502 using an LPP capability transfer procedure.

[0086] At 512, LMF 506 may request UL SRS configuration information of UE 502. LMF 506 may also provide assistance data (e.g., path loss reference, spatial relationship and / or SSB configuration, etc.) specified by serving base station 504. For example, LMF 506 may transmit an NR Positioning Protocol A (NRPPa) Positioning Information Request message to serving base station 504 to request UL information of UE 502.

[0087] At 514, serving base station 504 may determine available resources for UL SRS, and at 516, serving base station 504 may configure one or more UL SRS resource sets for UE 502 based on the available resources.

[0088] At 518, the serving base station 504 may provide the UL SRS configuration information to the LMF 506, such as via an NRPPa Positioning Information Response message.

[0089] At 520, the LMF 506 may select one or more candidate neighbor BS / TRPs 508, and the LMF 506 may provide the UL SRS configuration to the one or more candidate neighbor BS / TRPs 508 and / or the serving base station 504, such as via an NRPPa measurement request message. The message may include information for enabling the one or more candidate neighbor BS / TRPs 508 and / or the serving base station to perform UL measurements.

[0090] At 522, LMF 506 may transmit an LPP Provide Assistance Data message to UE 502. The message may include designated assistance data for UE 502 to perform DL measurements.

[0091] At 524, LMF 506 may transmit an LPP Request Location Information message to UE 502 to request multi-RTT measurement.

[0092] At 526, for semi-persistent or aperiodic UL SRS, LMF 506 may request serving base station 504 to activate / trigger UL SRS in UE 502. For example, LMF 506 may request activation of UE SRS transmission by transmitting an NRPPa positioning activation request message to serving base station 504.

[0093] At 528, the serving base station 504 may activate UE SRS transmission and transmit an NRPPa positioning activation response message. In response, the UE 502 may start UL-SRS transmission according to the time domain behavior of the UL SRS resource configuration.

[0094] At 530, the UE 502 may perform DL measurements provided in the assistance data from one or more candidate neighbor BS / TRPs 508 and / or serving base stations 504. At 532, each of the configured one or more candidate neighbor BS / TRPs 508 and / or serving base stations 504 may perform UL measurements.

[0095] At 534, UE 502 may report DL measurements to LMF 506, such as via an LPP Provide Location Information message.

[0096] At 536, each of the one or more candidate neighbor BS / TRPs 508 and / or serving base station 504 may report UL measurements to the LMF 506, such as via an NRPPa Measurement Response message.

[0097] At 538, the LMF 506 may determine the RTT from the UE 502 and the BS / TRP Rx-Tx time difference measurements for each of the one or more candidate neighboring BS / TRPs 508 and / or serving base stations 504 for which corresponding UL and DL measurements were provided at 534 and 536, and the LMF 506 may calculate the location of the UE 502.

[0098] In order to minimize latency and reduce signaling load, if there is no activity from the UE for a defined duration, the UE may suspend its session by transitioning to a radio resource control (RRC) inactive state. For example, after a random access procedure, the UE may be in an RRC connected state. The RRC protocol may be used on the air interface between the UE and the base station. The main functions of the RRC protocol may include connection establishment and release functions, broadcasting of system information, radio bearer establishment, reconfiguration and release, RRC connection mobility procedures, paging notifications and releases, and / or outer loop power control, etc. In some examples, such as in LTE, the UE may be in one of two RRC states (e.g., a connected state or an idle state). In other examples, such as in NR, the UE may be in one of three RRC states (connected state, idle state, or inactive state). Different RRC states may have different radio resources associated with each state, which the UE may use when it is in a given state. In some examples, the RRC state may also be referred to as an RRC mode.

[0099] Figure 6 600 is a diagram illustrating an example of different RRC states according to various aspects of the present disclosure. When the UE is powered on, the UE may initially be in an RRC disconnected / idle state 610. After a random access procedure, the UE may transition (move) to an RRC connected state 620. If the UE is inactive for a defined duration, the UE may suspend its session by transitioning to an RRC inactive state 630. The UE may resume its session by performing a random access procedure to transition back to the RRC connected state 620. Therefore, the UE may be specified to perform a random access procedure to transition to the RRC connected state 620, regardless of whether the UE is in the RRC idle state 610 or the RRC inactive state 630. Therefore, the RRC inactive state 630 may be a state between the RRC connected state 620 and the RRC disconnected / idle state 610, wherein when there is no business, the UE may stay in the inactive state without completely releasing the RRC, and quickly switch back to the connected state when necessary.

[0100] In some examples, the RRC idle state 610 may be used for public land mobile network (PLMN) selection, broadcast of system information, cell reselection mobility, paging for mobile terminated data (initiated and managed by 5GC) and / or discontinuous reception (DRX) for core network paging (configured by non-access stratum (NAS)), etc. In other examples, the RRC inactive state 620 may be used for 5GC and new RAN connection establishment (both control plane and user plane), UE context storage at the new RAN and UE, new RAN knowledge about the cell to which the UE belongs, transmission of unicast data to / from the UE and / or network controlled mobility, etc. In other examples, the RRC inactive state 630 may be used for PLMN selection, broadcast of system information, cell reselection for mobility, paging (initiated by the new RAN), RAN-based Notification Area (RNA) management (initiated by the new RAN), DRX for RAN paging (configured by the new RAN), 5GC and new RAN connection establishment for the UE (both control plane and user plane), UE context storage in the new RAN and UE and / or new RAN knowledge about the RNA to which the UE belongs, etc.

[0101] In some scenarios, during a UE positioning session, a UE (e.g., UE 404, 502) may also transition to an RRC inactive state to save radio and / or power resources while continuing to participate in the UE positioning session. For example, during a UE-assisted positioning session, the UE may transition to an RRC inactive state while continuing to measure a DL PRS sent from a base station and report the DL PRS measurements to the base station or a location server. In one example, the UE may report DL PRS measurements based on a small data transmission (SDT) (or UL SDT). SDT may refer to a transmission for a short data burst in a connectionless state, wherein when the UE is to transmit a small amount of data or data below a size threshold, the UE is not specified to establish a connection. In other words, SDT may enable a UE in an RRC inactive state to send infrequent and small data without specifying an RRC state transition.

[0102] For example, in some wireless communication networks, the uplink (UL) data generated in the RRC idle state of the UE may be sent by the UE after the UE transitions to the RRC connected state. The UE may transition from the RRC idle state to the RRC connected state in which the RRC recovery request message is sent to the serving base station. After the transmission of the UL data, the UE in the RRC connected state may be specified to receive an RRC release message from the base station to transition back to the RRC idle state. The UL transmission mechanism may not be suitable for UL data below a certain size (e.g., it may be referred to as small data or SDT) because the overhead of the entire process is inefficient for sending a small amount of data (e.g., the size of the overhead may be greater than the data and / or the time spent in transitioning the UE to the RRC connected state may be longer than the actual data transmission, etc.). In order to improve resource utilization, some wireless communication networks may include a mechanism for sending SDT without specifying that the UE transitions to the RRC connected state. For example, the wireless communication network may support early data transmission (EDT) and transmission using pre-configured uplink resources (PUR). EDT may enable the UE device to receive an UL grant for SDT in the RRC idle / inactive state via a random access process for EDT. A UE in RRC idle / inactive state may use an uplink grant to send UL small data. Transmission using PUR allows SDT from RRC idle / inactive state using PUR without performing a random access procedure. For the purposes of this disclosure, a UL SDT message may refer to a message whose size qualifies as an SDT (e.g., the size is below a certain threshold) and may be sent by a UE based on an EDT mechanism.

[0103] In addition, during a network-based positioning session, the UE may also be configured to send UL SRS when in an RRC inactive state. For example, when the UE is in an RRC connected state, auxiliary data with an SRS configuration may be provided to the UE, and the UE may continue to send SRS based on the SRS configuration after transitioning to an RRC inactive state. In other words, auxiliary data is provided when the UE is in an RRC connected state and transitions to an RRC inactive state. However, if the UE moves to a different cell while in an RRC inactive state or if the RSRP measured by the UE changes by more than a threshold, the UE may be configured to suspend its SRS transmission. In other words, if there is a significant change in the operating conditions at the UE, the UE may stop sending SRS in an RRC inactive state. This may cause the UE's positioning session to be interrupted, and the UE may be designated to transition to an RRC connected state for the UE positioning session to resume, which may increase latency and reduce the efficiency of UE positioning.

[0104] Various aspects presented herein may improve latency and efficiency of UE positioning. Various aspects presented herein may enhance positioning configuration management for UE and / or positioning entity (e.g., base station, location server, etc.) when the UE is in an RRC inactive state. For example, various aspects presented herein may enable the UE to request a positioning update during an RRC inactive state, such as requesting an updated configuration for its SRS transmission when there is a change in operating conditions at the UE. The UE may then apply the positioning update without transitioning to an RRC connected state.

[0105] Figure 7 700 is a communication flow illustrating an example of a UE updating a positioning configuration in an RRC inactive state according to various aspects of the present disclosure. The numbers associated with the communication flow 700 do not specify a particular time order and are merely used as a reference for the communication flow 700. The various aspects presented herein may enable the UE to transmit an RRC message requesting an updated UL SRS configuration to a base station when the UE is in an RRC inactive state and SDT is configured for the UE. For example, the UE may transmit updated (e.g., current) measurements associated with a signal received from the base station via a UL SDT message, such as L1-RSRP, intra-frequency and inter-frequency measurements (e.g., SSB measurements and / or CSI-RS or PRS measurements for radio resource management (RRM)), etc. In response, the base station may respond with an updated UL SRS configuration based on the measurements, wherein the updated UL SRS configuration may better match the current operating conditions of the UE.

[0106] At 710, the UE 702 in the RRC inactive state may be configured to continue to exchange positioning reference signals with the base station 704. For example, the UE 702 may continue to send UL SRS to the base station 704 and receive DL PRS from the base station 704, such as described above.

[0107] At 712, UE 702 may perform measurements on the DL PRS received from base station 704, such as measuring the RSRP of the DL PRS (e.g., for the purpose of determining / estimating the channel conditions between UE 702 and base station 704). Similarly, at 714, base station 704 may also perform measurements on the UL SRS received from UE 702.

[0108] At 716, based on the DL PRS measurement, the UE 702 may determine whether the PRS measurement meets a particular threshold or condition that specifies that the UE 702 update its UL SRS configuration, such as changing the transmit (Tx) power of the UL SRS, the periodicity of the UL SRS, the Tx beam used for the UL SRS, the direction of the Tx beam, and / or the resources (e.g., time and / or frequency resources) used to send the UL SRS, etc. The determination may be based on channel reciprocity, where the UE 702 may estimate the UL channel based on soundings on the DL channel (e.g., the channel conditions between the DL channel and the UL channel may be similar). For example, after measuring the DL PRS from the base station 704, the UE 702 may determine whether the RSRP drops below an RSRP threshold.

[0109] In another example, the UE 702 may also determine that a UL SRS configuration update is specified if there is a change in operating conditions at the UE 702. For example, the UE 702 may determine that an update to its UL SRS configuration is specified when the UE 702 moves to a different location (or moves a predefined distance), the power of the UE 702 drops below a certain power threshold / level, and / or the UE 702 is experiencing a high level of interference.

[0110] At 718, based on determining that a UL SRS configuration update is specified, the UE 702 may send a request 720 for a UL SRS configuration update in a UL SDT message to the base station 704. In addition, the UE 702 may also send an RRC resume request 722 and / or a measurement report 724 associated with the DL PRS measurement performed at 712 to the base station 704 (e.g., also via the UL SDT message or one or more other messages). The measurement report 724 may be sent to the base station 704 via RRC signaling or a medium access control (MAC)-control element (CE) (MAC-CE).

[0111] At 726, the base station 704 may send / forward the request 720 from the UE 702 to the LMF 706, such as via a location service (LCS) event report. At 728, in response to the request 720, the LMF 706 may request the base station 704 to configure UL SRS resources for the UE 702. The LMF 706 may also provide assistance data specified by the base station 704.

[0112] At 730, the base station 704 may determine updated UL SRS resources available to the UE 702. Then, at 732, the base station 704 may report the determined updated UL SRS resources to the LMF 706. In response, at 734, the LMF 706 may provide a new UL SRS configuration 736 to the base station 704.

[0113] At 738, LMF 706 may also send an acknowledgement of request 720 to base station 704, such as via an LCS event acknowledgement message (eg, in response to an LCS event report).

[0114] At 740, based on the new UL SRS configuration 736 received from the LMF 706, the base station 704 may transmit the new UL SRS configuration 736 to the UE 702, such as via a DL SDT message. In addition, the DL SDT message may also carry a DL report confirmation (e.g., in response to the measurement report 724 received at 718) and an RRC release message (e.g., in response to the RRC resume request 722 received at 718). For purposes of this disclosure, the new UL SRS configuration 736 may also be referred to as an updated SRS configuration or an updated configuration for SRS positioning resources, etc. Such an updated configuration may refer to a configuration that includes one or more updated parameters (e.g., updated SRS parameters) that are different from an existing configuration (e.g., original / current SRS parameters).

[0115] At 742 , after receiving the new UL SRS configuration 736 from the base station 704 , the UE 702 may send a UL SRS based on the new UL SRS configuration 736 (and also based on the UL SRS resources determined by the base station 704 at 730 ).

[0116]

[0013] Thus, various aspects presented herein may enable a UE to request modifications to its SRS configuration during an RRC inactive state without transitioning to an RRC connected state, thereby improving latency and efficiency of positioning configuration management.

[0117] Figure 8 800 is a communication flow illustrating an example of updating a positioning configuration in an RRC inactive state after a UE switches to a new base station according to various aspects of the present disclosure. The numbers associated with the communication flow 800 do not specify a particular time sequence and are merely used as a reference for the communication flow 800. Various aspects presented herein may enable the UE to transmit an RRC message to a first base station when the UE is in an RRC inactive state and an SDT is configured for the UE, the RRC message requesting a switch from the first base station to a second base station and requesting an updated UL SRS configuration from the second base station.

[0118] For example, when the UE is in an RRC inactive state, the UE may measure the DLPRS from the first base station and the second base station, and the UE may determine that the second base station has a better DL PRS measurement (e.g., channel conditions, RSRP, etc.) than the first base station. Therefore, based on the determination, the UE may transmit a UL SRS configuration update request in a UL SDT message, which may also include an indication of a request to switch from the first base station to the second base station. In response, the first base station may respond to the UE with a contention-free random access (CFRA) resource for the second base station, wherein the UE may use the CFRA resource to access the second base station, and the second base station may provide a new RRC inactive state configuration for the UE in the DL SDT message. The DL SDT message from the second base station may be scrambled by the first base station using a predetermined radio network temporary identifier (RNTI) (e.g., based on inter-cell coordination performed on the network side). Then, the DL SDT message from the second base station may indicate a new DL SDT configuration, a new UL SRS configuration, and / or a new UL SDT configuration for the UE.

[0119] Some wireless communication networks may enable UEs to access base stations based on a contention-based random access (CBRA) or CFRA procedure. CFRA may refer to a mode that a UE may initially use in a non-standalone (NSA) mode to perform a random access (RA) procedure. The UE may perform RA using an assigned preamble, and the process ends once the UE receives a random access response (RAR). CBRA is a fallback scenario in NSA mode. If CFRA fails, for example, if the transmission of a dedicated preamble is not confirmed within a configured time period, the UE may switch to CBRA to establish UL synchronization. CFRA may generally be applied when the UE is in RRC connected mode.

[0120] At 810, the UE 802 in the RRC inactive state may be configured to continue to exchange positioning reference signals with multiple base stations, which may include the first base station 804 and the second base station 808. For example, the UE 802 may continue to send UL SRS to the first base station 804 and the second base station 808, and receive DL PRS from the first base station 804 and the second base station 808.

[0121] At 812, UE 802 may perform measurements on DL PRS received from first base station 804 and second base station 808, such as measuring RSRP of DL PRS (e.g., for the purpose of determining / estimating channel conditions between UE 802 and the base stations). Similarly, at 814, first base station 804 and second base station 808 may also perform measurements on UL SRS received from UE 802.

[0122] At 816, based on the DL PRS measurement, the UE 802 may determine whether the PRS measurement from the base station meets a specific threshold or condition that specifies that the UE 802 changes to another base station (e.g., switches its access to another base station) and updates its UL SRS configuration accordingly, such as changing the Tx power of the UL SRS, the periodicity of the UL SRS, the Tx beam used for the UL SRS, the direction of the Tx beam, and / or the resources (e.g., time and / or frequency resources) used to send the UL SRS, etc. For example, after measuring the RSRP of the DL PRS from the first base station 804 and the second base station 808, the UE 802 may determine that the measured RSRP of the first base station 804 is below the RSRP threshold and / or the measured RSRP of the second base station 808 is higher than the first base station 804 (e.g., higher than the threshold). Therefore, the UE 802 may determine to switch its access from the first base station 804 to the second base station 808, which may specify a new UL SRS configuration for sending SRS to the second base station 808. In another example, the UE 802 may also determine that a base station switch and a UL SRS configuration update are specified if there is a change in operating conditions at the UE 802. For example, when the UE 802 moves from a cell associated with the first base station 804 to a cell associated with the second base station 808, the UE 802 may determine to switch to the second base station 808 and request a UL SRS configuration update from the second base station 808.

[0123] At 818, based on a determination that a base station switch (e.g., from the first base station 804 to the second base station 808) and a UL SRS configuration update are specified, the UE 802 may send a request 820 for a UL SRS configuration update to the first base station 804 in a UL SDT message, wherein the request 820 may also include an indication of the switch from the first base station 804 to the second base station 808. In one example, the indication of the switch from the first base station 804 to the second base station 808 may be explicit, wherein the UE 802 may determine that a base station switch is specified and explicitly request the first base station 804 to hand over the UE 802 to the second base station 808. In another example, the indication of the switch from the first base station 804 to the second base station 808 may be implicit, wherein the UE 802 may send DL PRS measurements of the first base station 804 and the second base station 808 to the first base station 804. Based on the DL PRS measurement, the first base station 804 may determine that the second base station 808 is more suitable for serving the UE 802, and the first base station 804 may determine to hand over the UE 802 to the second base station 808. In addition, the UE 802 may send an RRC resume request 822 and / or a measurement report 824 associated with the DL PRS measurement performed at 812 to the first base station 804 via a UL SDT message. The measurement report 824 may be sent to the first base station 804 via RRC signaling or MAC-CE.

[0124] In another aspect of the present disclosure, as shown at 817, a handover of a base station may also be determined by the LMF 806. For example, the first base station 804 and the second base station 808 may send their UL SRS measurements to the LMF 806. Based on the UL SRS measurements, the LMF 806 may determine that the second base station 808 is more suitable for serving the UE 802 than the first base station 804, and the LMF 806 may determine to hand over the UE 802 from the first base station 804 to the second base station 808.

[0125] At 826, the first base station 804 may send / forward the request 820 from the UE 802 to the LMF 806, such as via an LCS event report. At 828, the LMF may respond to the request 820, such as via an NRPPa Positioning Information Request message.

[0126] At 830, the first base station 804 may determine to handover (e.g., transfer) the UE 802 to the second base station 808. The determination may be based on a request 820 from the UE 802 (e.g., an explicit indication from the UE 802), based on a determination by the first base station 804 itself (e.g., an implicit indication from the UE 802), or based on a determination from the LMF 806 (e.g., as described at 817).

[0127] At 832, the first base station 804 may notify the LMF 806, such as via an LCS event report message, of the determination to hand over the UE 802 to the second base station 808. At 834, in response to the notification from the first base station 804, the LMF 806 may notify the second base station 808 of the determination to hand over the UE 802 to the second base station 808, such as via an NRPPa positioning information response message.

[0128] At 836, after receiving a determination to hand over UE 802 to second base station 808, second base station 808 may generate a CFRA configuration that may be used by UE 802 to access second base station 808, and second base station 808 may send the CFRA configuration to first base station 804. Under CFRA, a preamble may be allocated by a base station and such a preamble may be referred to as a dedicated random access preamble. A dedicated preamble may be provided to the UE via RRC signaling (the allocation preamble may be specified in an RRC message) or PHY layer signaling (e.g., DCI on PDCCH). Therefore, there may be no preamble collision.

[0129] At 838, after receiving the CFRA configuration from the second base station 808, the first base station 804 may send the CFRA configuration to the UE 802 via a DL SDT message. In addition, the DL SDT message may also include an SRS suspension configuration (e.g., notifying the UE 802 to suspend SRS transmission to the first base station 804), an acknowledgment for the request 820 (e.g., an LCS event report acknowledgment), and / or a positioning session suspension notification (e.g., notifying the UE 802 to suspend the positioning session during the handover process), etc.

[0130] At 840, based on the received CFRA configuration, UE 802 may perform a CFRA procedure with the second base station 808 and obtain access to the second base station 808. In addition, UE 802 may send a positioning session resume request to the second base station 808 based on the CFRA procedure to resume the suspended positioning session (e.g., after receiving the positioning session suspension notification at 838).

[0131] At 842, the base station 808 may notify the LMF 806 of the completion of the handover (eg, the UE 802 has gained access to the second base station 808). In response, at 844, the LMF 806 may communicate, such as via a communication link in conjunction with Figure 5 The NRPPa measurement request message described in 520 is used to provide a new UL SRS configuration 846 to multiple base stations (including the second base station 808) participating in the positioning session.

[0132] At 848, based on the new UL SRS configuration 846 received from the LMF 806, the second base station 808 may transmit the new UL SRS configuration 846 to the UE 802, such as via an RRC release message. In addition, the RRC release message may also carry a new DL SDT configuration (e.g., for the UE 802 to receive a DL SDT message from the second base station 808) and / or a new UL SDT configuration (e.g., for the UE 802 to send a UL SDT message to the second base station 808). Examples of DL / UL SDT configurations may include time and frequency resources, periodicity, and / or offsets for DL / UL SDT, etc.

[0133] At 850 , after receiving the new UL SRS configuration 846 from the first base station 804 , the UE 802 may send a UL SRS based on the new UL SRS configuration 846 (and also based on the UL SRS resources determined by the second base station 808 ).

[0134] Thus, aspects presented herein may enable a UE to switch its access to a new base station during an RRC inactive state and request an SRS configuration update for the new base station without transitioning to an RRC connected state, thereby improving latency and efficiency of positioning configuration management.

[0135] Fig. 9 900 is a flow chart of a method of wireless communication. The method may be performed by a UE (e.g., UE 104, 404, 502, 702, 802; device 1104). The method may enable a UE to request a positioning update during an RRC inactive state, such as requesting an updated configuration for its SRS transmission when there is a change in operating conditions at the UE. The UE may then apply the positioning update without transitioning to an RRC connected state.

[0136] At 902, the UE may perform a set of measurements associated with a plurality of DL signals from a first network entity, wherein the set of measurements is performed during an RRC inactive state of the UE, such as in conjunction with Figure 7 and Figure 8 For example, in Figure 8 At 810, UE 802 may measure DL PRS from first base station 804 during an RRC inactive state of UE 802. Measurement of multiple DL signals may be performed by, for example Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the device 1104 is executed.

[0137] In one example, the plurality of DL signals include DL-PRS, SIB, CSI-RS, DM-RS, or a combination thereof.

[0138] At 904, the UE may send a request to the first network entity for an updated configuration for a set of SRS positioning resources based on a set of measurements for a plurality of DL signals, such as in conjunction with Figure 7 and Figure 8 For example, in Figure 8 At 818, UE 802 may send a request 820 for a UL SRS configuration update to the first base station 804 based on the measurement of the DL PRS from the first base station 804. The request may be sent by, for example Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the device 1104 is executed.

[0139] In one example, the request for an updated configuration for the SRS positioning resource set is sent via a UL SDT message. In such examples, the UL SDT message may also include an L1-RSRP measurement set, an intra-frequency positioning measurement set, or an inter-frequency positioning measurement set, or a combination thereof.

[0140] At 906, the UE may send, based on the measurement set for the plurality of DL signals, at least one of an RRC recovery request or a report of the measurement set associated with the plurality of DL signals to the first network entity, such as in conjunction with Figure 7 and Figure 8For example, in Figure 8 At 818, UE 802 may also send at least one of an RRC recovery request 822 or a measurement report 824 for DL ​​PRS to the first base station 804. The sending of the RRC recovery request and / or report may be performed by, for example Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the device 1104 is executed.

[0141] In one example, the report of the measurement set associated with the plurality of DL signals is sent to the first network entity via RRC signaling or MAC-CE.

[0142] At 908, the UE may receive, from the first network entity, a configuration for a CFRA procedure at the second network entity, wherein an indication of an updated configuration for a set of SRS positioning resources is received from the second network entity based on the CFRA procedure, such as in conjunction with Figure 8 For example, in Figure 8 At 838, UE 802 may receive a CFRA configuration for a second base station 808 from the first base station 804, wherein the UL SRS configuration update is received from the second base station 808 based on a CFRA procedure. Receipt of the configuration for the CFRA procedure may be performed by, for example Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the device 1104 is executed.

[0143] At 910, the UE may perform a CFRA procedure with the second network entity based on the configuration for the CFRA procedure at the second network entity, and the UE may send a positioning session resumption request to the second network entity based on the CFRA procedure, such as in conjunction with Figure 8 For example, in Figure 8 At 840, UE 802 may perform CFRA and obtain access to the second base station 808 and send a request to resume the positioning session to the second base station 808. The CFRA process may be performed by, for example, Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the device 1104 is executed.

[0144] In one example, the indication of an updated configuration for the set of SRS positioning resources is received from the second network entity based on a positioning session resumption request.

[0145] At 912, the UE may receive an indication of an updated configuration for a set of SRS positioning resources based on the request, such as in conjunction with Figure 7 and Figure 8 For example, in Figure 8At 848, UE 802 may receive UL SRS configuration 846 from second base station 808. Receipt of an indication of an updated configuration for a set of SRS positioning resources may be performed by, for example Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the device 1104 is executed.

[0146] In one example, an indication of an updated configuration for a set of SRS positioning resources is received from a first network entity.

[0147] At 914, the UE may receive a DL SDT configuration and a UL SDT configuration from the second network entity based on the positioning session resumption request, wherein the indication of the updated configuration for the SRS positioning resource set, the DL SDT configuration, and the UL SDT configuration are received from the second network entity simultaneously, such as in conjunction with Figure 8 For example, in Figure 8 At 848, UE 802 may receive a DL SDT configuration and a UL SDT configuration from the second base station 808 based on the positioning session resumption request, wherein the UL SRS configuration 846, the DL SDT configuration, and the UL SDT configuration may be received from the second base station 808 at the same time. The reception of the DL SDT configuration and the UL SDT configuration may be performed by, for example Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the device 1104 is executed.

[0148] In one example, the indication of the updated configuration for the set of SRS positioning resources, the DL SDT configuration, and the UL SDT configuration are received from the second network entity in an RRC release message.

[0149] At 916, the UE may transmit the SRS set using the SRS positioning resource set based on the updated configuration for the SRS positioning resource set, such as in conjunction with Figure 7 and Figure 8 For example, in Figure 8 At 850, UE 802 may send an SRS based on the new UL SRS configuration 846. The transmission of the SRS set may be performed by, for example, Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the device 1104 is executed.

[0150] Fig.101000 is a flow chart of a method of wireless communication. The method may be performed by a UE (e.g., UE 104, 404, 502, 702, 802; device 1104). The method may enable a UE to request a positioning update during an RRC inactive state, such as requesting an updated configuration for its SRS transmission when there is a change in operating conditions at the UE. The UE may then apply the positioning update without transitioning to an RRC connected state.

[0151] At 1002, the UE may perform a set of measurements associated with a plurality of DL signals from a first network entity, wherein the set of measurements is performed during an RRC inactive state of the UE, such as in conjunction with Figure 7 and Figure 8 For example, in Figure 8 At 810, UE 802 may measure DL PRS from first base station 804 during an RRC inactive state of UE 802. Measurement of multiple DL signals may be performed by, for example Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the device 1104 is executed.

[0152] In one example, the plurality of DL signals include DL-PRS, SIB, CSI-RS, DM-RS, or a combination thereof.

[0153] At 1004, the UE may send a request to the first network entity for an updated configuration for a set of SRS positioning resources based on a set of measurements for a plurality of DL signals, such as in conjunction with Figure 7 and Figure 8 For example, in Figure 8 At 818, UE 802 may send a request 820 for a UL SRS configuration update to the first base station 804 based on the measurement of the DL PRS from the first base station 804. The request may be sent by, for example Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the device 1104 is executed.

[0154] In one example, the request for an updated configuration for the SRS positioning resource set is sent via a UL SDT message. In such examples, the UL SDT message may also include an L1-RSRP measurement set, an intra-frequency positioning measurement set, or an inter-frequency positioning measurement set, or a combination thereof.

[0155] In another example, the UE may send at least one of an RRC recovery request or a report of a measurement set associated with the plurality of DL signals to the first network entity based on the measurement set for the plurality of DL signals, such as in conjunction with Figure 7 and Figure 8 For example, in Figure 8At 818, UE 802 may also send at least one of an RRC recovery request 822 or a measurement report 824 for DL ​​PRS to the first base station 804. The sending of the RRC recovery request and / or report may be performed by, for example Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the device 1104 in the embodiment of the present invention is executed. In such examples, the report of the measurement set associated with the plurality of DL signals is sent to the first network entity via RRC signaling or MAC-CE.

[0156] In another example, the UE may receive, from the first network entity, a configuration for a CFRA procedure at the second network entity, wherein an indication of an updated configuration for the SRS positioning resource set is received from the second network entity based on the CFRA procedure, such as in conjunction with Figure 8 For example, in Figure 8 At 838, UE 802 may receive a CFRA configuration for a second base station 808 from the first base station 804, wherein the UL SRS configuration update is received from the second base station 808 based on a CFRA procedure. Receipt of the configuration for the CFRA procedure may be performed by, for example Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the device 1104 is executed.

[0157] In another example, the UE may perform a CFRA procedure with the second network entity based on the configuration for the CFRA procedure at the second network entity, and the UE may send a positioning session resumption request to the second network entity based on the CFRA procedure, such as in conjunction with Figure 8 For example, in Figure 8 At 840, UE 802 may perform CFRA and obtain access to the second base station 808 and send a request to resume the positioning session to the second base station 808. The CFRA process may be performed by, for example, Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the apparatus 1104 in the embodiment of the present invention is executed. In such examples, the indication of the updated configuration for the SRS positioning resource set is received from the second network entity based on the positioning session resumption request.

[0158] At 1012, the UE may receive an indication of an updated configuration for a set of SRS positioning resources based on the request, such as in conjunction with Figure 7 and Figure 8 For example, in Figure 8 At 848, UE 802 may receive UL SRS configuration 846 from second base station 808. Receipt of an indication of an updated configuration for a set of SRS positioning resources may be performed by, for example Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the device 1104 is executed.

[0159] In one example, an indication of an updated configuration for a set of SRS positioning resources is received from a first network entity.

[0160] In another example, the UE may receive a DL SDT configuration and a UL SDT configuration from the second network entity based on the positioning session resumption request, wherein the indication of the updated configuration for the SRS positioning resource set, the DL SDT configuration, and the UL SDT configuration are received from the second network entity at the same time, such as in conjunction with Figure 8 For example, in Figure 8 At 848, UE 802 may receive a DL SDT configuration and a UL SDT configuration from the second base station 808 based on the positioning session resumption request, wherein the UL SRS configuration 846, the DL SDT configuration, and the UL SDT configuration may be received from the second base station 808 at the same time. The reception of the DL SDT configuration and the UL SDT configuration may be performed by, for example Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the device 1104 in the embodiment of the present invention is executed. In such examples, the indication of the updated configuration for the SRS positioning resource set, the DL SDT configuration, and the UL SDT configuration are received from the second network entity in an RRC release message.

[0161] In another example, the UE may use the SRS positioning resource set to send the SRS set based on the updated configuration for the SRS positioning resource set, such as in conjunction with Figure 7 and Figure 8 For example, in Figure 8 At 850, UE 802 may send SRS based on the new UL SRS configuration 846. The transmission of the SRS set may be performed by, for example Fig.11 The positioning configuration update request component 198 and / or the transceiver 1122 of the device 1104 is executed.

[0162] Fig.111100 is a diagram illustrating an example of a hardware implementation for an apparatus 1104. The apparatus 1104 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, the apparatus 1104 may include a cellular baseband processor 1124 (also referred to as a modem) coupled to one or more transceivers 1122 (e.g., a cellular RF transceiver). The cellular baseband processor 1124 may include on-chip memory 1124'. In some aspects, the apparatus 1104 may also include one or more subscriber identity module (SIM) cards 1120 and an application processor 1106 coupled to a secure digital (SD) card 1108 and a screen 1110. The application processor 1106 may include on-chip memory 1106'. In some aspects, the device 1104 may also include a Bluetooth module 1112, a WLAN module 1114, an SPS module 1116 (e.g., a GNSS module), one or more sensor modules 1118 (e.g., an atmospheric pressure sensor / altimeter; a motion sensor such as an inertial management unit (IMU), a gyroscope, and / or an accelerometer; a sound navigation and ranging (SONAR), a magnetometer, audio, and / or other technologies for positioning), an additional memory module 1126, a power supply 1130, and / or a camera 1132. The Bluetooth module 1112, the WLAN module 1114, and the SPS module 1116 may include an on-chip transceiver (TRX) (or, in some cases, only a receiver (RX)). The Bluetooth module 1112, the WLAN module 1114, and the SPS module 1116 may include their own dedicated antennas and / or utilize an antenna 1180 for communication. The cellular baseband processor 1124 communicates with the UE 104 and / or with the RU associated with the network entity 1102 through the transceiver 1122 via one or more antennas 1180. The cellular baseband processor 1124 and the application processor 1106 may each include a computer-readable medium / memory 1124', 1106', respectively. The additional memory module 1126 may also be considered a computer-readable medium / memory. Each computer-readable medium / memory 1124', 1106', 1126 may be non-transitory. The cellular baseband processor 1124 and the application processor 1106 are each responsible for general processing, including executing software stored on a computer-readable medium / memory. The software, when executed by the cellular baseband processor 1124 / application processor 1106, enables the cellular baseband processor 1124 / application processor 1106 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the cellular baseband processor 1124 / application processor 1106 when executing the software. The cellular baseband processor 1124 / application processor 1106 may be a component of the UE 350 and may include a memory 360 and / or at least one of the TX processor 368 , the RX processor 356 , and the controller / processor 359 .In one configuration, the device 1104 may be a processor chip (modem and / or applications) and include only the cellular baseband processor 1124 and / or the application processor 1106, while in another configuration, the device 1104 may be an entire UE (eg, see. Figure 3 350) and includes additional modules of device 1104.

[0163] As discussed above, component 198 is configured to perform a set of measurements associated with a plurality of DL signals from a first network entity, wherein the set of measurements is performed during an RRC inactive state of the UE; based on the set of measurements for the plurality of DL signals, send a request to the first network entity for an updated configuration for a set of SRS positioning resources; and receive an indication of the updated configuration for the set of SRS positioning resources based on the request. Component 198 may be within the cellular baseband processor 1124, the application processor 1106, or within both the cellular baseband processor 1124 and the application processor 1106. Component 198 may be one or more hardware components specifically configured to perform the process / algorithm, implemented by one or more processors configured to perform the process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination thereof. As shown, the apparatus 1104 may include a variety of components configured for various functions. In one configuration, the apparatus 1104 (and in particular the cellular baseband processor 1124 and / or the application processor 1106) includes means for performing a set of measurements associated with a plurality of DL signals from a first network entity, wherein the set of measurements is performed during an RRC inactive state of the UE. The apparatus 1104 may also include means for sending a request for an updated configuration for a set of SRS positioning resources to the first network entity based on the set of measurements for the plurality of DL signals. The apparatus 1104 may also include means for receiving an indication of the updated configuration for the set of SRS positioning resources based on the request.

[0164] In one configuration, the plurality of DL signals include DL-PRS, SIB, CSI-RS, DM-RS, or a combination thereof.

[0165] In another configuration, the request for an updated configuration for the SRS positioning resource set is sent via a UL SDT message. In such a configuration, the UL SDT message may also include an L1-RSRP measurement set, an intra-frequency positioning measurement set, or an inter-frequency positioning measurement set, or a combination thereof.

[0166] In another configuration, the apparatus 1104 may further include means for sending at least one of an RRC recovery request or a report of the measurement set associated with the plurality of DL signals to the first network entity based on the measurement set for the plurality of DL signals. In such a configuration, the report of the measurement set associated with the plurality of DL signals is sent to the first network entity via RRC signaling or MAC-CE.

[0167] In another configuration, the apparatus 1104 may further include means for receiving, from the first network entity, a configuration for a CFRA procedure at a second network entity, wherein the indication of the updated configuration for the set of SRS positioning resources is received from the second network entity based on the CFRA procedure.

[0168] In another configuration, the apparatus 1104 may further include means for performing the CFRA procedure with the second network entity based on the configuration for the CFRA procedure at the second network entity. The apparatus 1104 may further include means for sending a positioning session resumption request to the second network entity based on the CFRA procedure. In such a configuration, the indication of the updated configuration for the SRS positioning resource set is received from the second network entity based on the positioning session resumption request.

[0169] In another configuration, the indication of the updated configuration for the set of SRS positioning resources is received from the first network entity.

[0170] In another configuration, the apparatus 1104 may further include means for receiving a DL SDT configuration and a UL SDT configuration from the second network entity based on the positioning session resumption request, wherein the indication of the updated configuration for the SRS positioning resource set, the DL SDT configuration, and the UL SDT configuration are received from the second network entity simultaneously. In such a configuration, the indication of the updated configuration for the SRS positioning resource set, the DL SDT configuration, and the UL SDT configuration are received from the second network entity in an RRC release message.

[0171] In another configuration, the apparatus 1104 may further include means for transmitting an SRS set using the SRS positioning resource set based on the updated configuration for the SRS positioning resource set.

[0172] Fig.12 1200 is a flow chart of a method of wireless communication. The method may be performed by a first base station (e.g., base station 102, 704, 804, 808; network entity 1402). The method may enable the first base station to receive a location update request from a UE during an RRC inactive state of the UE, and provide a location update to the UE or hand over the UE to a second base station based on the request.

[0173] At 1202, a first base station may transmit a plurality of DL signals, wherein the plurality of DL signals include DL-PRS, SIB, CSI-RS, DM-RS, or a combination thereof, such as in combination with Figure 7 and Figure 8 For example, in Figure 8 At 810, the first base station 804 may send a DL PRS to the UE 802. The transmission of multiple DL signals may be performed by, for example Fig.14 The positioning configuration update process component 199 and / or the transceiver 1446 of the network entity 1402 is executed.

[0174] At 1204, the first base station may receive a request for an updated configuration for a set of SRS positioning resources from a UE, wherein the request for an updated configuration for a set of SRS positioning resources is based on a set of measurements associated with a plurality of DL signals, such as in combination with Figure 7 and Figure 8 For example, in Figure 8 At 818, base station 804 may receive a request 820 from UE 802 for a UL SRS configuration update based on the PRS measurements performed by UE 802. Receipt of the request may be performed by, for example Fig.14 The positioning configuration update process component 199 and / or the transceiver 1446 of the network entity 1402 is executed.

[0175] In one example, the request for the updated configuration for the SRS positioning resource set is received via a UL SDT message during an RRC inactive state of the UE. In such examples, the UL SDT message also includes an L1-RSRP measurement set, an intra-frequency positioning measurement set, or an inter-frequency positioning measurement set, or a combination thereof.

[0176] At 1206, the first base station may receive from the UE at least one of an RRC recovery request or a report of a measurement set associated with a plurality of DL signals, such as in conjunction with Figure 7 and Figure 8 For example, in Figure 8 At 818, the first base station 804 may receive an RRC recovery request 822 and / or a measurement report 824 associated with the DL PRS from the UE 802. Receipt of the RRC recovery request or report may be performed by, for example Fig.14 The positioning configuration update process component 199 and / or the transceiver 1446 of the network entity 1402 is executed.

[0177] In one example, the report of the measurement set associated with the plurality of DL signals is received via RRC signaling or MAC-CE.

[0178] At 1208, the first base station may configure an updated configuration for the SRS positioning resource set based on at least one of: a request for an updated configuration for the SRS positioning resource set, an RRC recovery request, or a report of a measurement set associated with a plurality of DL signals, such as in conjunction with Figure 7 For example, in Figure 7 At 730, the base station 704 may determine updated UL SRS resources available to the UE 702 based on the SRS configuration update request 720. The configuration of the updated configuration for the SRS positioning resource set may be performed by, for example Fig.14 The positioning configuration update process component 199 and / or the transceiver 1446 of the network entity 1402 is executed.

[0179] At 1210, the first base station may send an indication of at least one of: an updated configuration for a set of SRS positioning resources or a configuration for a CFRA process at a second network entity, such as in conjunction with Figure 7 For example, in Figure 7 At 740, based on the new UL SRS configuration 736 received from the LMF 706, the base station 704 may transmit the new UL SRS configuration 736 to the UE 702, such as via a DL SDT message. In addition, the DL SDT message may also carry a DL report confirmation and an RRC release message. The sending of the indication may be performed by, for example Fig.14 The positioning configuration update process component 199 and / or the transceiver 1446 of the network entity 1402 is executed.

[0180] In one example, the indication of the updated configuration for the SRS positioning resource set is sent to the UE via a DL SDT message. In such examples, the DL SDT message also includes an RRC release message.

[0181] At 1212, the first base station may perform a handover procedure to transfer the UE to a second network entity, such as in conjunction with Figure 8 For example, in Figure 8 At 830, the first base station 804 may determine to transfer the UE 802 to the second base station 808. The handover process may be performed by, for example Fig.14 The positioning configuration update process component 199 and / or the transceiver 1446 of the network entity 1402 is executed.

[0182] In one example, the handover process is performed based on the second network entity having more suitable positioning measurements than the first network entity. In another example, the first base station may receive a configuration for the CFRA process from the second network entity before sending the indication.

[0183] At 1214, the first base station may send an SRS suspension configuration, a configuration for a CFRA process at a second network entity, and a positioning session suspension configuration to the UE, such as in conjunction with Figure 8 For example, in Figure 8 At 838, the first base station 804 sends the CFRA configuration to the UE 802 via a DL SDT message. In addition, the DL SDT message may also include an SRS suspension configuration, an acknowledgement of the request 820, and / or a positioning session suspension notification, etc. The transmission of the SRS suspension configuration, the configuration for the CFRA process at the second network entity, and the positioning session suspension configuration may be performed by, for example Fig.14 The positioning configuration update process component 199 and / or the transceiver 1446 of the network entity 1402 is executed.

[0184] In one example, the SRS suspension configuration, the configuration for the CFRA procedure at the second network entity, and the positioning session suspension configuration are sent via a DL SDT message.

[0185] In another example, the updated configuration for the SRS positioning resource set is sent from the second network entity based on the CFRA procedure.

[0186] Fig.13 1300 is a flow chart of a method of wireless communication. The method may be performed by a first base station (e.g., base station 102, 704, 804, 808; network entity 1402). The method may enable the first base station to receive a location update request from a UE during an RRC inactive state of the UE, and provide a location update to the UE or hand over the UE to a second base station based on the request.

[0187] At 1304, the first base station may receive a request for an updated configuration for a set of SRS positioning resources from a UE, wherein the request for an updated configuration for a set of SRS positioning resources is based on a set of measurements associated with a plurality of DL signals, such as in combination with Figure 7 and Figure 8 For example, in Figure 8 At 818, base station 804 may receive a request 820 from UE 802 for a UL SRS configuration update based on the PRS measurements performed by UE 802. Receipt of the request may be performed by, for example Fig.14 The positioning configuration update process component 199 and / or the transceiver 1446 of the network entity 1402 is executed.

[0188] In one example, the first base station may send a plurality of DL signals, wherein the plurality of DL signals include DL-PRS, SIB, CSI-RS, DM-RS, or a combination thereof, such as a combination of Figure 7 and Figure 8For example, in Figure 8 At 810, the first base station 804 may send a DL PRS to the UE 802. The transmission of multiple DL signals may be performed by, for example Fig.14 The positioning configuration update process component 199 and / or the transceiver 1446 of the network entity 1402 is executed.

[0189] In another example, the request for the updated configuration for the SRS positioning resource set is received via a UL SDT message during an RRC inactive state of the UE. In such examples, the UL SDT message also includes an L1-RSRP measurement set, an intra-frequency positioning measurement set, or an inter-frequency positioning measurement set, or a combination thereof.

[0190] In another example, the first base station may receive from the UE at least one of an RRC recovery request or a report of a measurement set associated with a plurality of DL signals, such as in conjunction with Figure 7 and Figure 8 For example, in Figure 8 At 818, the first base station 804 may receive an RRC recovery request 822 and / or a measurement report 824 associated with the DL PRS from the UE 802. Receipt of the RRC recovery request or report may be performed by, for example Fig.14 The positioning configuration update process component 199 and / or the transceiver 1446 of the network entity 1402 is executed.

[0191] In another example, the report of the measurement set associated with the plurality of DL signals is received via RRC signaling or MAC-CE.

[0192] In another example, the first base station may configure the updated configuration for the SRS positioning resource set based on at least one of: a request for an updated configuration for the SRS positioning resource set, an RRC recovery request, or a report of a measurement set associated with a plurality of DL signals, such as in conjunction with Figure 7 For example, in Figure 7 At 730, the base station 704 may determine updated UL SRS resources available to the UE 702 based on the SRS configuration update request 720. The configuration of the updated configuration for the SRS positioning resource set may be performed by, for example Fig.14 The positioning configuration update process component 199 and / or the transceiver 1446 of the network entity 1402 is executed.

[0193] At 1310, the first base station may send an indication of at least one of: an updated configuration for a set of SRS positioning resources or a configuration for a CFRA process at a second network entity, such as in conjunction with Figure 7 For example, in Figure 7 At 740, based on the new UL SRS configuration 736 received from the LMF 706, the base station 704 may transmit the new UL SRS configuration 736 to the UE 702, such as via a DL SDT message. In addition, the DL SDT message may also carry a DL report confirmation and an RRC release message. The sending of the indication may be performed by, for example Fig.14 The positioning configuration update process component 199 and / or the transceiver 1446 of the network entity 1402 is executed.

[0194] In one example, the indication of the updated configuration for the SRS positioning resource set is sent to the UE via a DL SDT message. In such examples, the DL SDT message also includes an RRC release message.

[0195] In another example, the first base station may perform a handover procedure to transfer the UE to the second network entity, such as in conjunction with Figure 8 For example, in Figure 8 At 830, the first base station 804 may determine to transfer the UE 802 to the second base station 808. The handover process may be performed by, for example Fig.14 The handover process is performed by the positioning configuration update process component 199 and / or the transceiver 1446 of the network entity 1402 in the handover process. In such examples, the handover process is performed based on the second network entity having a more suitable positioning measurement than the first network entity.

[0196] In another example, the first base station may receive a configuration for the CFRA procedure from the second network entity before sending the indication. In such an example, the first base station may send the SRS suspension configuration, the configuration for the CFRA procedure at the second network entity, and the positioning session suspension configuration to the UE, such as in conjunction with Figure 8 For example, in Figure 8 At 838, the first base station 804 sends the CFRA configuration to the UE 802 via a DL SDT message. In addition, the DL SDT message may also include an SRS suspension configuration, an acknowledgement of the request 820, and / or a positioning session suspension notification, etc. The transmission of the SRS suspension configuration, the configuration for the CFRA process at the second network entity, and the positioning session suspension configuration may be performed by, for example Fig.14 The positioning configuration update process component 199 and / or the transceiver 1446 of the network entity 1402 in the example are performed. In such examples, the SRS suspension configuration, the configuration for the CFRA process at the second network entity, and the positioning session suspension configuration are sent via a DL SDT message. In such examples, the updated configuration for the SRS positioning resource set is sent from the second network entity based on the CFRA process.

[0197] Fig.141400 is a diagram illustrating an example of a hardware implementation for a network entity 1402. The network entity 1402 may be a BS, a component of a BS, or may implement BS functionality. The network entity 1402 may include at least one of a CU 1410, a DU 1430, or a RU 1440. For example, depending on the layer functionality handled by the component 199, the network entity 1402 may include a CU 1410; both the CU 1410 and the DU 1430; each of the CU 1410, the DU 1430, and the RU 1440; the DU 1430; both the DU 1430 and the RU 1440; or the RU 1440. The CU 1410 may include a CU processor 1412. The CU processor 1412 may include an on-chip memory 1412'. In some aspects, the CU 1410 may also include an additional memory module 1414 and a communication interface 1418. CU 1410 communicates with DU 1430 via a midhaul link, such as an F1 interface. DU 1430 may include a DU processor 1432. DU processor 1432 may include on-chip memory 1432'. In some aspects, DU 1430 may also include an additional memory module 1434 and a communication interface 1438. DU 1430 communicates with RU 1440 via a fronthaul link. RU 1440 may include a RU processor 1442. RU processor 1442 may include on-chip memory 1442'. In some aspects, RU 1440 may also include an additional memory module 1444, one or more transceivers 1446, an antenna 1480, and a communication interface 1448. RU 1440 communicates with UE 104. On-chip memory 1412', 1432', 1442' and additional memory modules 1414, 1434, 1444 can each be considered as a computer-readable medium / memory. Each computer-readable medium / memory can be non-transitory. Each processor in processor 1412, 1432, 1442 is responsible for general processing, including executing software stored on computer-readable medium / memory. The software, when executed by the corresponding processor, enables the processor to perform the various functions described above. The computer-readable medium / memory can also be used to store data manipulated by the processor when executing the software.

[0198] As discussed above, component 199 is configured to: receive a request for an updated configuration for a set of SRS positioning resources from a UE, wherein the request for the updated configuration for the set of SRS positioning resources is based on a measurement set associated with a plurality of DL signals; and send an indication of at least one of: the updated configuration for the set of SRS positioning resources or a configuration for a CFRA process at a second network entity. Component 199 may be within one or more processors of one or more of CU 1410, DU 1430, and RU 1440. Component 199 may be one or more hardware components specifically configured to perform the process / algorithm, implemented by one or more processors configured to perform the process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination thereof. Network entity 1402 may include a variety of components configured for various functions. In one configuration, the network entity 1402 includes means for receiving a request for an updated configuration for a set of SRS positioning resources from a UE, wherein the request for the updated configuration for the set of SRS positioning resources is based on a measurement set associated with a plurality of DL signals. The apparatus 1104 may also include means for sending an indication of at least one of: the updated configuration for the set of SRS positioning resources or a configuration for a CFRA procedure at a second network entity.

[0199] In one configuration, the apparatus 1104 may further include means for transmitting the plurality of DL signals, wherein the plurality of DL signals include DL-PRS, SIB, CSI-RS, DM-RS, or a combination thereof.

[0200] In another configuration, the request for the updated configuration for the SRS positioning resource set is received via a UL SDT message during an RRC inactive state of the UE. In such configuration, the UL SDT message also includes an L1-RSRP measurement set, an intra-frequency positioning measurement set, or an inter-frequency positioning measurement set, or a combination thereof.

[0201] In another configuration, the apparatus 1104 may also include means for receiving, from the UE, at least one of an RRC resumption request or a report of the measurement set associated with the plurality of DL signals.

[0202] In another configuration, the report of the measurement set associated with the plurality of DL signals is received via RRC signaling or MAC-CE.

[0203] In another configuration, the device 1104 may also include a component for configuring the updated configuration for the SRS positioning resource set based on at least one of the following: the request for the updated configuration for the SRS positioning resource set, the RRC recovery request, or the report of the measurement set associated with the multiple DL signals.

[0204] In another configuration, the indication of the updated configuration for the SRS positioning resource set is sent to the UE via a DL SDT message.In such configuration, the DL SDT message also includes an RRC release message.

[0205] In another configuration, the apparatus 1104 may further include means for performing a handover procedure to transfer the UE to the second network entity. In such configurations, the handover procedure is performed based on the second network entity having a more suitable positioning measurement than the first network entity.

[0206] In another configuration, the apparatus 1104 may also include means for receiving the configuration for the CFRA procedure from the second network entity before sending the indication. In such a configuration, the apparatus 1104 may also include means for sending an SRS suspension configuration, the configuration for the CFRA procedure at the second network entity, and a positioning session suspension configuration to the UE. In such a configuration, the SRS suspension configuration, the configuration for the CFRA procedure at the second network entity, and the positioning session suspension configuration are sent via a DL SDT message. In such a configuration, the updated configuration for the SRS positioning resource set is sent from the second network entity based on the CFRA procedure.

[0207] The means may be a component 199 of the network entity 1402 configured to perform the functions recited by the means. As described above, the network entity 1402 may include the TX processor 316, the RX processor 370, and the controller / processor 375. Thus, in one configuration, the means may be the TX processor 316, the RX processor 370, and / or the controller / processor 375 configured to perform the functions recited by the means.

[0208] It should be understood that the specific order or hierarchy of the blocks in the disclosed process / flowchart is only an illustration of the exemplary method. It should be understood that the specific order or hierarchy of the blocks in the process / flowchart can be rearranged based on design preferences. In addition, some blocks can be combined or omitted. The attached method claims provide the elements of each block in a sample order, but are not limited to the specific order or hierarchy provided.

[0209] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects. Therefore, the claims are not limited to the various aspects described herein, but should be given the full scope consistent with the language claims. Unless otherwise specified, references to elements in the singular form do not mean "one and only one", but "one or more". Terms such as "if", "when ......" and "while" do not mean a direct temporal relationship or reaction. That is, these phrases, such as "when ......", do not mean immediate action in response to the occurrence of an action or during the occurrence of an action, but only mean that if the conditions are met, the action will occur, but no specific or immediate time limit is required for the occurrence of the action. The wording "exemplary" is used herein to mean "used as an example, instance or illustration". Any aspect described as "exemplary" herein is not necessarily interpreted as being preferred or having advantages over other aspects. Unless otherwise specifically stated, the term "some" refers to one or more. Combinations such as "at least one of A, B, or C", "one or more of A, B, or C", "at least one of A, B and C", "one or more of A, B, and C", and "A, B, C, or any combination thereof" include any combination of A, B, and / or C, and may include multiple A, multiple B, or multiple C. Specifically, combinations such as "at least one of A, B, or C", "one or more of A, B, or C", "at least one of A, B, and C", "one or more of A, B, and C", and "A, B, C, or any combination thereof" may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, where any such combination may contain one or more members of A, B, or C. A set should be interpreted as a set of elements, where the number of elements is one or more. Thus, for a set of X, X will include one or more elements. If the first device receives data from the second device or sends data to the second device, data can be directly received / sent between the first device and the second device, or data can be indirectly received / sent between the first device and the second device through a collection of devices. All structural and functional equivalents of the elements throughout the various aspects described in this disclosure that are known or will be known later to those of ordinary skill in the art are expressly incorporated herein by reference and are covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is explicitly stated in the claims. Words such as "module", "mechanism", "element", "device" cannot replace the word "component". Therefore, no claim element will be understood as a functional component unless the element is explicitly described using the phrase "component for...".

[0210] As used herein, the phrase "based on" should not be interpreted as referring to a closed set of information, one or more conditions, one or more factors, etc. In other words, the phrase "based on A" (where "A" can be information, a condition, a factor, etc.) should be interpreted as "based at least on A" unless specifically stated differently.

[0211] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0212] Aspect 1 is a method for performing wireless communications at a UE, the method comprising: performing a measurement set associated with multiple DL signals from a first network entity, wherein the measurement set is performed during an RRC inactive state of the UE; based on the measurement set for the multiple DL signals, sending a request for an updated configuration for an SRS positioning resource set to the first network entity; and receiving an indication of the updated configuration for the SRS positioning resource set based on the request.

[0213] Aspect 2 is a method according to aspect 1, and the method further includes: sending at least one of an RRC recovery request or a report of the measurement set associated with the multiple DL signals to the first network entity based on the measurement set for the multiple DL signals.

[0214] Aspect 3 is a method according to aspect 2, wherein the report of the measurement set associated with the plurality of DL signals is sent to the first network entity via RRC signaling or MAC-CE.

[0215] Aspect 4 is a method according to any one of aspects 1 to 3, wherein the request for the updated configuration for the SRS positioning resource set is sent via a UL SDT message.

[0216] Aspect 5 is a method according to aspect 4, wherein the UL SDT message further includes an L1-RSRP measurement set, an intra-frequency positioning measurement set, or an inter-frequency positioning measurement set, or a combination thereof.

[0217] Aspect 6 is a method according to any one of aspects 1 to 5, wherein the multiple DL signals include DL-PRS, SIB, CSI-RS, DM-RS, or a combination thereof.

[0218] Aspect 7 is a method according to any one of aspects 1 to 6, wherein the indication of the updated configuration for the set of SRS positioning resources is received from the first network entity.

[0219] Aspect 8 is a method according to any one of Aspects 1 to 7, the method further comprising: receiving a configuration for a CFRA process at a second network entity from the first network entity, wherein the indication of the updated configuration for the SRS positioning resource set is received from the second network entity based on the CFRA process.

[0220] Aspect 9 is a method according to aspect 8, the method further comprising: performing the CFRA process with the second network entity based on the configuration for the CFRA process at the second network entity; and sending a positioning session resumption request to the second network entity based on the CFRA process.

[0221] Aspect 10 is a method according to aspect 9, wherein the indication of the updated configuration for the set of SRS positioning resources is received from the second network entity based on the positioning session resumption request.

[0222] Aspect 11 is a method according to aspect 10, the method further comprising: receiving a DL SDT configuration and a UL SDT configuration from the second network entity based on the positioning session resumption request, wherein the indication of the updated configuration for the SRS positioning resource set, the DL SDT configuration and the UL SDT configuration are received from the second network entity simultaneously.

[0223] Aspect 12 is a method according to aspect 11, wherein the indication of the updated configuration for the SRS positioning resource set, the DL SDT configuration and the UL SDT configuration are received from the second network entity in an RRC release message.

[0224] Aspect 13 is a method according to any one of aspects 1 to 12, the method further comprising: sending an SRS set using the SRS positioning resource set based on the updated configuration for the SRS positioning resource set.

[0225] Aspect 14 is an apparatus for performing wireless communication at a UE, the apparatus comprising: a memory; and at least one processor, the at least one processor being coupled to the memory and being configured to implement any one of Aspects 1 to 13 based at least in part on information stored in the memory.

[0226] Aspect 15 is the apparatus of aspect 14, further comprising at least one of an antenna or a transceiver coupled to the at least one processor.

[0227] Aspect 16 is an apparatus for wireless communication, the apparatus comprising means for implementing any one of aspects 1 to 13.

[0228] Aspect 17 is a computer-readable medium (eg, non-transitory computer-readable medium) storing computer-executable code, wherein the code, when executed by a processor, causes the processor to implement any one of aspects 1 to 13.

[0229] Aspect 18 is a method for wireless communication at a first network entity, the method comprising: receiving a request for an updated configuration for an SRS positioning resource set from a UE, wherein the request for the updated configuration for the SRS positioning resource set is based on a measurement set associated with multiple DL signals; and sending an indication of at least one of: the updated configuration for the SRS positioning resource set or a configuration for a CFRA process at a second network entity.

[0230] Aspect 19 is a method according to aspect 18, the method further comprising: receiving at least one of an RRC recovery request or a report of the measurement set associated with the plurality of DL signals from the UE.

[0231] Aspect 20 is a method according to aspect 19, wherein the report of the measurement set associated with the plurality of DL signals is received via RRC signaling or MAC-CE.

[0232] Aspect 21 is a method according to any one of aspects 18 to 20, wherein the request for the updated configuration for the SRS positioning resource set is received via a UL SDT message during an RRC inactive state of the UE.

[0233] Aspect 22 is a method according to aspect 21, wherein the UL SDT message further includes an L1-RSRP measurement set, an intra-frequency positioning measurement set, or an inter-frequency positioning measurement set, or a combination thereof.

[0234] Aspect 23 is a method according to any one of aspects 18 to 22, the method further comprising: sending the multiple DL signals, wherein the multiple DL signals include DL-PRS, SIB, CSI-RS, DM-RS or a combination thereof.

[0235] Aspect 24 is a method according to any one of Aspects 18 to 23, the method further comprising: configuring the updated configuration for the SRS positioning resource set based on at least one of: the request for the updated configuration for the SRS positioning resource set, the RRC recovery request, or a report of the measurement set associated with the multiple DL signals.

[0236] Aspect 25 is a method according to any one of aspects 18 to 24, wherein the indication of the updated configuration for the SRS positioning resource set is sent to the UE via a DL SDT message.

[0237] Aspect 26 is a method according to aspect 25, wherein the DL SDT message further includes an RRC release message.

[0238] Aspect 27 is a method according to any one of aspects 18 to 26, the method further comprising: performing a handover procedure to transfer the UE to the second network entity.

[0239] Aspect 28 is a method according to any one of Aspect 27, wherein the handover process is performed based on the second network entity having more suitable positioning measurements than the first network entity.

[0240] Aspect 29 is a method according to any one of Aspect 27, the method further comprising: receiving the configuration for the CFRA process from the second network entity before sending the indication.

[0241] Aspect 30 is a method according to any one of Aspect 29, the method further comprising: sending an SRS suspension configuration, the configuration for the CFRA process at the second network entity, and a positioning session suspension configuration to the UE.

[0242] Aspect 31 is a method according to any one of Aspect 30, wherein the SRS suspension configuration, the configuration for the CFRA procedure at the second network entity and the positioning session suspension configuration are sent via a DL SDT message.

[0243] Aspect 32 is a method according to any one of Aspect 29, wherein the updated configuration for the SRS positioning resource set is sent from the second network entity based on the CFRA procedure.

[0244] Aspect 33 is an apparatus for performing wireless communications at a first base station, the apparatus comprising: a memory; and at least one processor, the at least one processor being coupled to the memory and being configured to implement any one of Aspects 18 to 32 based at least in part on information stored in the memory.

[0245] Aspect 34 is the apparatus of aspect 33, further comprising at least one of an antenna or a transceiver coupled to the at least one processor.

[0246] Aspect 35 is an apparatus for wireless communication, the apparatus comprising means for implementing any one of aspects 18 to 32.

[0247] Aspect 36 is a computer-readable medium (eg, non-transitory computer-readable medium) storing computer-executable code, wherein the code, when executed by a processor, causes the processor to implement any one of aspects 18 to 32 .

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: Memory; and at least one processor coupled to the memory and based at least in part on the information stored in the memory, the at least one processor configured to: performing a set of measurements associated with a plurality of downlink (DL) signals from a first network entity, wherein the set of measurements is performed during a radio resource control (RRC) inactive state of the UE; sending, to the first network entity, a request for an updated configuration for a set of sounding reference signal (SRS) positioning resources based on the measurement set for the plurality of DL signals; and An indication of the updated configuration for the set of SRS positioning resources is received based on the request.

2. The apparatus of claim 1 , wherein the at least one processor is further configured to: At least one of an RRC resumption request or a report of the measurement set associated with the plurality of DL signals is sent to the first network entity based on the measurement set for the plurality of DL signals.

3. The apparatus of claim 2, wherein the report of the measurement set associated with the plurality of DL signals is sent to the first network entity via RRC signaling or a medium access control (MAC)-control element (CE) (MAC-CE). 4 . The apparatus of claim 1 , wherein the request for the updated configuration for the set of SRS positioning resources is sent via an uplink (UL) small data transfer (SDT) message.

5. The apparatus of claim 4, wherein the UL SDT message further comprises a layer 1 (L1) reference signal received power (RSRP) (L1-RSRP) measurement set, an intra-frequency positioning measurement set, or an inter-frequency positioning measurement set, or a combination thereof.

6. The apparatus of claim 1, wherein the plurality of DL signals comprises a DL positioning reference signal (PRS) (DL-PRS), a system information block (SIB), a channel state information reference signal (CSI-RS), a demodulation reference signal (DM-RS), or a combination thereof.

7. The apparatus of claim 1, wherein the indication of the updated configuration for the set of SRS positioning resources is received from the first network entity.

8. The apparatus of claim 1, wherein the at least one processor is further configured to: A configuration for a contention free random access (CFRA) procedure at a second network entity is received from the first network entity, wherein the indication of the updated configuration for the set of SRS positioning resources is received from the second network entity based on the CFRA procedure.

9. The apparatus of claim 8, wherein the at least one processor is further configured to: performing the CFRA procedure with the second network entity based on the configuration for the CFRA procedure at the second network entity; and A positioning session resumption request is sent to the second network entity based on the CFRA process.

10. The apparatus of claim 9, wherein the indication of the updated configuration for the set of SRS positioning resources is received from the second network entity based on the positioning session resumption request.

11. The apparatus of claim 10, wherein the at least one processor is further configured to: A DL small data transmission (SDT) configuration and an uplink (UL) SDT configuration are received from the second network entity based on the positioning session resumption request, wherein the indication of the updated configuration for the SRS positioning resource set, the DL SDT configuration and the UL SDT configuration are received from the second network entity simultaneously.

12. The apparatus of claim 11, wherein the indication of the updated configuration for the set of SRS positioning resources, the DL SDT configuration, and the UL SDT configuration are received from the second network entity in an RRC release message.

13. The apparatus of claim 1, wherein the at least one processor is further configured to: An SRS set is transmitted using the SRS positioning resource set based on the updated configuration for the SRS positioning resource set.

14. A method of wireless communication at a user equipment (UE), the method comprising: performing a set of measurements associated with a plurality of downlink (DL) signals from a first network entity, wherein the set of measurements is performed during a radio resource control (RRC) inactive state of the UE; sending, to the first network entity, a request for an updated configuration for a set of sounding reference signal (SRS) positioning resources based on the measurement set for the plurality of DL signals; and An indication of the updated configuration for the set of SRS positioning resources is received based on the request.

15. An apparatus for wireless communication at a first network entity, the apparatus comprising: Memory; and at least one processor coupled to the memory and based at least in part on the information stored in the memory, the at least one processor configured to: receiving, from a user equipment (UE), a request for an updated configuration for a set of sounding reference signal (SRS) positioning resources, wherein the request for the updated configuration for the set of SRS positioning resources is based on a measurement set associated with a plurality of downlink (DL) signals; and An indication of at least one of: the updated configuration for the set of SRS positioning resources or a configuration for a contention free random access (CFRA) procedure at a second network entity is sent.

16. The apparatus of claim 15, wherein the at least one processor is further configured to: At least one of a radio resource control (RRC) resumption request or a report of the measurement set associated with the plurality of DL signals is received from the UE.

17. The apparatus of claim 16, wherein the report of the measurement set associated with the plurality of DL signals is received via RRC signaling or a Medium Access Control (MAC)-Control Element (CE) (MAC-CE).

18. The apparatus of claim 15, wherein the request for the updated configuration for the set of SRS positioning resources is received via an uplink (UL) small data transfer (SDT) message during a radio resource control (RRC) inactive state of the UE.

19. The apparatus of claim 18, wherein the UL SDT message further comprises a layer 1 (L1) reference signal received power (RSRP) (L1-RSRP) measurement set, an intra-frequency positioning measurement set, or an inter-frequency positioning measurement set, or a combination thereof.

20. The apparatus of claim 15, wherein the at least one processor is further configured to: The multiple DL signals are sent, wherein the multiple DL signals include a DL positioning reference signal (PRS) (DL-PRS), a system information block (SIB), a channel state information reference signal (CSI-RS), a demodulation reference signal (DM-RS), or a combination thereof.

21. The apparatus of claim 15, wherein the at least one processor is further configured to: The updated configuration for the set of SRS positioning resources is configured based on at least one of: the request for the updated configuration for the set of SRS positioning resources, a radio resource control (RRC) resumption request, or a report of the set of measurements associated with the plurality of DL signals.

22. The apparatus of claim 15, wherein the indication of the updated configuration for the set of SRS positioning resources is sent to the UE via a DL small data transmission (SDT) message.

23. The apparatus of claim 22, wherein the DL SDT message further comprises an RRC release message.

24. The apparatus of claim 15, wherein the at least one processor is further configured to: A handover procedure is performed to transfer the UE to the second network entity.

25. The apparatus of claim 24, wherein the handover process is performed based on the second network entity having more suitable positioning measurements than the first network entity.

26. The apparatus of claim 24, wherein the at least one processor is further configured to: The configuration for the CFRA procedure is received from the second network entity prior to sending the indication.

27. The apparatus of claim 26, wherein the at least one processor is further configured to: An SRS suspension configuration, the configuration for the CFRA procedure at the second network entity, and a positioning session suspension configuration are sent to the UE.

28. The apparatus of claim 27, wherein the SRS suspension configuration, the configuration for the CFRA procedure at the second network entity, and the positioning session suspension configuration are transmitted via a DL Small Data Transfer (SDT) message.

29. The apparatus of claim 26, wherein the updated configuration for the set of SRS positioning resources is sent from the second network entity based on the CFRA procedure.

30. A method for wireless communication at a first network entity, the method comprising: receiving, from a user equipment (UE), a request for an updated configuration for a set of sounding reference signal (SRS) positioning resources, wherein the request for the updated configuration for the set of SRS positioning resources is based on a measurement set associated with a plurality of downlink (DL) signals; and An indication of at least one of: the updated configuration for the set of SRS positioning resources or a configuration for a contention free random access (CFRA) procedure at a second network entity is sent.

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