Power control mechanism for positioning

Abstract

This disclosure provides systems, methods, and devices for wireless communication supporting power control for positioning. The transmit (Tx) power of a user equipment (UE) for Uu or SL communications may be controlled (e.g., jointly controlled) by the UE or a base station. In a first aspect, the UE determines Tx power based on an SL pathloss value or feedback from another UE. In a second aspect, the UE is configured to adjust Tx power and resource allocation (e.g., the number of symbols per SL positioning instance). In a third aspect, the base station is configured to receive or determine SL or Uu channel measurements, and signal SL Tx power for the UE. In a fourth aspect, the base station indicates a scheme to be used by the UE to determine SL Tx power. Other aspects and features are also claimed and described.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Greek Patent Application No. 20220100524, filed on June 30, 2022, entitled “POWER CONTROL MECHANISM FOR POSITIONING”, which is expressly incorporated herein by reference in its entirety. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communication systems, and more particularly to power control mechanisms for positioning such as sidelink (SL) positioning or joint Uu and SL positioning. Some features may enable and provide improved communications, including determining user equipment (UE) transmit power, determining positioning information for UE, reduced crosstalk, reduced interference, improved final positioning estimate of UE, improved received signal quality, improved UE power management, or a combination thereof. Background Art

[0004] Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, etc. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing the available network resources. Such networks may be multiple-access networks capable of supporting communication for multiple users by sharing the available network resources.

[0005] A wireless communication network may include several components. These components may include wireless communication devices, such as a base station (or Node B) that may support communication of multiple user equipments (UEs). A UE may communicate with a base station via a downlink and an uplink. A downlink (or forward link) refers to a communication link from a base station to a UE, and an uplink (or reverse link) refers to a communication link from a UE to a base station.

[0006] The base station may send data and control information to the UE on the downlink, or receive data and control information from the UE on the uplink. On the downlink, the transmission from the base station may encounter interference caused by transmissions from neighboring base stations or other wireless radio frequency (RF) transmitters. On the uplink, the transmission from the UE may encounter interference from other UEs communicating with neighboring base stations or from uplink transmissions of other wireless RF transmitters. This interference may degrade performance on both the downlink and uplink.

[0007] As the demand for mobile broadband access continues to grow, the potential for interference and congested networks grows with more UEs accessing long-range wireless communication networks and more short-range wireless systems deployed in communities. Research and development continues to advance wireless technologies to not only meet the growing demand for mobile broadband access, but also to improve and enhance the user experience with mobile communications.

[0008] With the introduction of 5th Generation (5G) or New Radio (NR) networks (sometimes referred to as "5G NR" networks / systems / devices), UEs are capable of higher capabilities, higher data rates, and higher bandwidth. In addition, the UE is also capable of operating in various architectures that provide dual connectivity. In addition, 5G provides parameters to improve the accuracy of determining the positioning of the UE (such as in Uu positioning or sidelink (SL) positioning). As devices continue to improve and "do more things", networks and devices of the network may experience increased network congestion, overhead, and interference associated with determining positioning information of devices within the network, such as when multiple devices are densely co-located. Summary of the invention

[0009] The following summarizes some aspects of the present disclosure to provide a basic understanding of the technology discussed. This summary is not an exhaustive overview of all expected features of the present disclosure, and is neither intended to identify key or important elements of all aspects of the present disclosure, nor to define the scope of any or all aspects of the present disclosure. Its only purpose is to give some concepts of one or more aspects of the present disclosure in a summarized form as a prelude to more specific embodiments presented later.

[0010] In one aspect of the present disclosure, a method for wireless communication includes receiving, by a network entity, first path loss information based on SL communication associated with a sidelink (SL) positioning session from a first UE of a plurality of user equipments (UEs) associated with the plurality of UEs. The method also includes sending first transmit power information indicating a first transmit (Tx) power for Uu communication and SL to the first UE.

[0011] In an additional aspect of the present disclosure, an apparatus includes at least one processor and a memory coupled to the at least one processor. The at least one processor is configured to receive first path loss information based on SL communication associated with the plurality of UEs from a first UE of a plurality of UEs associated with a SL positioning session. The at least one processor is also configured to initiate sending first transmit power information indicating a first Tx power for Uu communication and SL to the first UE.

[0012] In an additional aspect of the present disclosure, an apparatus includes a component for receiving first path loss information based on SL communication associated with the multiple UEs from a first UE among multiple UEs associated with a SL positioning session. The apparatus also includes a component for sending first transmit power information indicating a first Tx power for Uu communication and SL to the first UE.

[0013] In an additional aspect of the present disclosure, a non-transitory computer-readable medium stores instructions that, when executed by a processor, cause the processor to perform operations. The operations include receiving first path loss information based on SL communications associated with the multiple UEs from a first UE of multiple UEs associated with a SL positioning session. The operations also include initiating transmission of first transmit power information indicating a first Tx power for Uu communications and SL to the first UE.

[0014] In an additional aspect of the present disclosure, a method for wireless communication includes receiving, by a first UE, a path loss scheme indicator from a network entity. The path loss scheme indicator indicates one of a plurality of path loss schemes. The method also includes determining a first Tx power for a SL positioning session performed by the first UE based on the scheme indicated by the path loss scheme indicator.

[0015] In an additional aspect of the present disclosure, an apparatus includes at least one processor and a memory coupled to the at least one processor. The at least one processor is configured to receive a path loss scheme indicator from a network entity. The path loss scheme indicator indicates one of a plurality of path loss schemes. The at least one processor is configured to determine a first Tx power for a SL positioning session conducted by a first UE based on the scheme indicated by the path loss scheme indicator.

[0016] In an additional aspect of the present disclosure, an apparatus includes a component for receiving a path loss scheme indicator from a network entity. The path loss scheme indicator indicates one of a plurality of path loss schemes. The apparatus also includes determining a first Tx power for a SL positioning session conducted by a first UE based on the scheme indicated by the path loss scheme indicator.

[0017] In an additional aspect of the present disclosure, a non-transitory computer-readable medium stores instructions that, when executed by a processor, cause the processor to perform operations. The operations include receiving a path loss scheme indicator from a network entity. The path loss scheme indicator indicates one of a plurality of path loss schemes. The operations also include determining a first Tx power for a SL positioning session conducted by a first UE based on the scheme indicated by the path loss scheme indicator.

[0018] In an additional aspect of the present disclosure, a method for wireless communication includes identifying, by a first UE, a first Tx power based on one or more SL messages between the first UE and one or more UEs. The first Tx power is based on a first path loss value between the first UE and a second UE of the one or more UEs. The method also includes sending an SL sounding reference signal (SRS) location signal based on the first Tx power.

[0019] In an additional aspect of the present disclosure, an apparatus includes at least one processor and a memory coupled to the at least one processor. The at least one processor is configured to identify, by a first UE, a first Tx power based on one or more SL messages between the first UE and one or more UEs. The first Tx power is based on a first path loss value between the first UE and a second UE of the one or more UEs. The at least one processor is also configured to initiate transmission of an SL SRS location signal based on the first Tx power.

[0020] In an additional aspect of the present disclosure, an apparatus includes a component for identifying, by a first UE, a first Tx power based on one or more SL messages between the first UE and one or more UEs. The first Tx power is based on a first path loss value between the first UE and a second UE of the one or more UEs. The apparatus also includes a component for sending a SL sounding reference signal (SRS) location signal based on the first Tx power.

[0021] In an additional aspect of the present disclosure, a non-transitory computer-readable medium stores instructions that, when executed by a processor, cause the processor to perform operations. The operations include identifying, by a first UE, a first Tx power based on one or more SL messages between the first UE and one or more UEs. The first Tx power is based on a first path loss value between the first UE and a second UE of the one or more UEs. The operations also include initiating transmission of an SL SRS location signal based on the first Tx power.

[0022] In an additional aspect of the present disclosure, a method for wireless communication includes sending, by a UE to one or more UEs, a first SRS configuration associated with SL communication between multiple UEs including the UE and the one or more UEs. The first SRS configuration indicates a first Tx power for SL communication and a first number of symbols for each SL positioning instance associated with a SL positioning session. The method also includes sending a first SL SRS location signal to the one or more UEs or receiving the first SL SRS location signal from the one or more UEs based on the first SRS configuration.

[0023] In an additional aspect of the present disclosure, an apparatus includes at least one processor and a memory coupled to the at least one processor. The at least one processor is configured to send a first SRS configuration associated with SL communication between multiple UEs including the UE and the one or more UEs to one or more UEs. The first SRS configuration indicates a first Tx power for SL communication and a first number of symbols for each SL positioning instance associated with a SL positioning session. The at least one processor is also configured to send a first SL SRS location signal to the one or more UEs or receive the first SL SRS location signal from the one or more UEs based on the first SRS configuration.

[0024] In an additional aspect of the present disclosure, an apparatus includes a component for sending, by a UE, a first SRS configuration associated with SL communication between multiple UEs including the UE and the one or more UEs to one or more UEs. The first SRS configuration indicates a first Tx power for SL communication and a first number of symbols for each SL positioning instance associated with a SL positioning session. The apparatus also includes sending a first SL SRS location signal to the one or more UEs or receiving the first SL SRS location signal from the one or more UEs based on the first SRS configuration.

[0025] In an additional aspect of the present disclosure, a non-transitory computer-readable medium stores instructions that, when executed by a processor, cause the processor to perform operations. The operations include sending a first SRS configuration associated with SL communications between multiple UEs including the UE and the one or more UEs to one or more UEs. The first SRS configuration indicates a first Tx power for SL communications and a first number of symbols for each SL positioning instance associated with a SL positioning session. The operations also include initiating sending a first SL SRS location signal to the one or more UEs or receiving the first SL SRS location signal from the one or more UEs based on the first SRS configuration.

[0026] The features and technical advantages of examples according to the present disclosure have been outlined quite extensively above so that the following specific embodiments may be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples may be easily used as a basis for modifying or designing other structures for the same purpose of achieving the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. When considered in conjunction with the accompanying drawings, the characteristics of the concepts disclosed herein (both their organization and methods of operation) and the associated advantages will be better understood according to the following description. Each of the figures in the accompanying drawings is provided for the purpose of illustration and description, and not as a definition of limitations to the claims.

[0027] Although various aspects and specific implementations are described in this application by the illustration of some examples, it will be understood by those skilled in the art that additional specific implementations and use cases may be generated in many other arrangements and scenarios. The innovation described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, aspects and / or uses 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 specifically point to use cases or applications, the applicability of various types of described innovations may occur. The scope of specific implementations can range from chip-level or modular components to non-modular, non-chip-level specific implementations, and further to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems that include one or more aspects of the described innovations. In some practical environments, the equipment in combination with the various aspects and features described may also necessarily include additional components and features for implementing and practicing the various aspects claimed and described. For example, the transmission and reception of wireless signals necessarily include multiple components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.). The innovations described herein are intended to be practiced in a variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc., having different sizes, shapes, and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] A further understanding of the nature and advantages of the present disclosure may be achieved by reference to the following drawings. In the drawings, similar components or features may have the same reference label. In addition, various components of the same type may be distinguished by adding a dash and a second label to distinguish between similar components after the reference label. If only the first reference label is used in the specification, the description applies to any one of the similar components having the same first reference label, regardless of the second reference label.

[0029] Figure 1 is a block diagram illustrating details of an example wireless communication system in accordance with one or more aspects.

[0030] Figure 2 is a block diagram illustrating an example of a base station and a user equipment (UE) according to one or more aspects.

[0031] Figure 3 A diagram illustrating an example decomposed base station architecture in accordance with one or more aspects is shown.

[0032] Figure 4is a block diagram illustrating an example wireless communication system that supports power control for positioning in accordance with one or more aspects.

[0033] Figure 5 is a flow diagram illustrating an example process for supporting power control for positioning in accordance with one or more aspects.

[0034] Figure 6 is a flow diagram illustrating an example process for supporting power control for positioning in accordance with one or more aspects.

[0035] Figure 7 is a flow diagram illustrating an example process for supporting power control for positioning in accordance with one or more aspects.

[0036] Figure 8 is a block diagram of an example UE supporting power control for positioning according to one or more aspects.

[0037] Fig. 9 is a flow diagram illustrating an example process for supporting power control for positioning in accordance with one or more aspects.

[0038] Fig.10 is a block diagram of an example base station supporting power control for positioning according to one or more aspects.

[0039] The same reference numbers and designations in different drawings represent the same elements. DETAILED DESCRIPTION

[0040] The "Detailed Description" set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to limit the scope of the present disclosure. Rather, the "Detailed Description" includes specific details for providing a thorough understanding of the subject matter of the present invention. It will be apparent to those skilled in the art that these specific details are not required in every case, and in some instances, well-known structures and components are shown in block diagram form for clarity of presentation.

[0041] The present disclosure provides systems, devices, methods and computer-readable media that support power control for positioning. For example, the transmit (Tx) power of a user equipment (UE) for Uu communication, SL communication may be controlled by the UE or by a base station. For example, SL communication may include SL positioning. In some specific implementations, the Tx power of the UE may be jointly controlled for Uu communication and SL communication (e.g., SL positioning). In some specific implementations, the UE may determine the Tx power based on the SL path loss value, feedback from another UE participating in the SL communication with the UE in the SL communication, or a combination thereof. Additionally or alternatively, the UE may be configured to adjust the Tx power, resource allocation (e.g., the number of symbols for each SL positioning instance of a SL positioning session), or a combination thereof. For example, in some specific implementations, feedback associated with SL communication may enable the UE to adjust the Tx power, resource allocation (e.g., the number of symbols for each SL positioning instance of a SL positioning session), or a combination thereof. In some specific implementations, the base station may be configured to receive or determine measurements, such as SL channel measurements, Uu channel measurements, or a combination thereof, and signal or configure the Tx power of one or more UEs. For illustration, the measurements may include or correspond to a path loss estimate or a path loss value, and the base station may determine the Tx power based on the path loss estimate or the path loss value. In some implementations, the operations described herein may be associated with or correspond to a UE that is within the coverage of a base station or outside the coverage of a base station (e.g., within the coverage area of ​​a base station or outside the coverage area of ​​a base station).

[0042] In some embodiments, when a UE is out of coverage of a base station, the UE may determine the Tx power of a SL sounding reference signal (SRS) location signal based on one or more SL messages exchanged between the UE and another UE. For example, the one or more SL messages may be exchanged during a discovery phase, a round trip time (RTT) positioning operation, or a bilateral RTT positioning operation. In some embodiments, when a UE is out of coverage of a base station, the UE is configured to determine or adjust an SRS configuration including or indicating an SL Tx power (e.g., SL Tx power for SL positioning), a number of symbols (e.g., the number of OFDM symbols for each SL positioning session instance), or a combination thereof. In some embodiments, when a UE is in coverage of a base station, a network entity (e.g., a base station, a core network, a location management function (LMF)) is configured to receive measurement information or path loss information associated with SL communication between multiple UEs. Based on the received measurement information or path loss information, in addition to the uplink (UL) signal measurement or UL path loss information performed by the base station, the network entity also determines the Tx power for SL communication (e.g., SL positioning) of multiple UEs. The network entity may send Tx power information including or indicating Tx power for SL communication to multiple UEs. In some embodiments, when the UE is in the coverage of the base station, the network entity may indicate one of multiple schemes to the UE so that the UE can determine the Tx power for SL communication (e.g., SL positioning). The multiple schemes may include a SL path loss scheme, a UL path loss scheme, and a joint SL and UL path loss scheme.

[0043] Specific implementations of the subject matter described in the present disclosure may be implemented to achieve one or more of the following potential advantages or benefits. In some aspects, the present disclosure provides techniques for power control for positioning such as SL positioning. Power control in SL positioning, Uu positioning, or both SL positioning and Uu positioning may allow or enable an optimized positioning session involving both a PC5 link and a Uu link. In addition, assuming that the PC5 link and the Uu link typically have different power requirements, determining and signaling appropriate power values ​​for optimizing received signals on both the Uu link and the PC5 link may improve received signal quality and subsequent final positioning estimates. These techniques may also reduce UE power by selecting a Tx power for SL communication that is optimized for a positioning session, based on the current UE power state, or a combination thereof.

[0044] The present disclosure as a whole relates to providing or participating in authorized shared access between two or more wireless devices in one or more wireless communication systems (also referred to as wireless communication networks). In various specific implementations, the various techniques and devices can be used in wireless communication networks, such as code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, single carrier FDMA (SC-FDMA) networks, LTE networks, GSM networks, fifth generation (5G) or new radio (NR) networks (sometimes referred to as "5G NR" networks, systems or devices) and other communication networks. As described herein, the terms "network" and "system" can be used interchangeably.

[0045] A CDMA network may implement, for example, a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Wideband-CDMA (W-CDMA) and Low Chip Rate (LCR). CDMA2000 covers IS-2000, IS-95, and IS-856 standards.

[0046] For example, a TDMA network may implement a radio technology such as the Global System for Mobile Communications (GSM). The Third Generation Partnership Project (3GPP) defines the standard for the GSM EDGE (Enhanced Data Rate for GSM Evolution) Radio Access Network (RAN) (also known as GERAN). GERAN is the radio component of the network of GSM / EDGE together with connecting base stations (e.g., Ater and Abis interfaces) and base station controllers (A interfaces, etc.). The radio access network represents a component of the GSM network through which telephone calls and packet data are routed from the public switched telephone network (PSTN) and the Internet to subscriber phones (also known as user terminals or user equipment (UE)) and from subscriber phones to the PSTN and the Internet. The network of a mobile phone operator may include one or more GERANs, which may be coupled to the UTRAN in the case of a UMTS / GSM network. Additionally, the operator network may also include one or more LTE networks, or one or more other networks. Various network types may use different radio access technologies (RATs) and RANs.

[0047] OFDMA network can implement radio technology such as Evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM, etc. UTRA, E-UTRA and GSM are part of Universal Mobile Telecommunications System (UMTS). Specifically, Long Term Evolution (LTE) is a UMTS version using E-UTRA. UTRA, E-UTRA, GSM, UMTS and LTE are described in documents provided by an organization named "3rd Generation Partnership Project" (3GPP), and cdma2000 is described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). These various radio technologies and standards are known or under development. For example, 3GPP is a collaboration between telecommunications association groups to define a globally applicable third generation (3G) mobile phone specification. 3GPP LTE is a 3GPP plan to improve the UMTS mobile phone standard. 3GPP can define the specifications of next generation mobile networks, mobile systems and mobile devices. The present disclosure may describe certain aspects with reference to LTE, 4G or 5G NR technology; however, the description is not intended to be limited to a particular technology or application, and one or more aspects described with reference to one technology may be understood to be applicable to another technology. Additionally, one or more aspects of the present disclosure may relate to shared access to wireless spectrum between networks using different radio access technologies or radio air interfaces.

[0048] 5G networks are expected to have diverse deployments, diverse spectrum, and diverse services and devices that can be implemented using a unified air interface based on OFDM. To achieve these goals, in addition to developing new radio technologies for 5G NR networks, further enhancements to LTE and LTE-A are also being considered. 5G NR will be able to scale to provide coverage (1) to massive Internet of Things (IoT), with ultra-high density (e.g., about 1M nodes / km 2 ), ultra-low complexity (e.g., about 10s of bits / sec), ultra-low energy (e.g., about 10+ years of battery life), and deep coverage with the ability to reach challenging locations; (2) including mission-critical control with strong security to protect sensitive personal, financial, or classified information, ultra-high reliability (e.g., about 99.9999% reliability), ultra-low latency (e.g., about 1 millisecond (ms)), and users with a wide range of mobility or lack of mobility; and (3) providing services with enhanced mobile broadband (including extremely high capacity (e.g., about 10Tbps / km 2 ), coverage of extremely high data rates (e.g., multi-Gbps rates, 100+Mbps user experience rates), and deep awareness with advanced discovery and optimization).

[0049] Devices, networks, and systems may be configured to communicate via one or more portions of the electromagnetic spectrum. 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 ranges designated FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). Frequencies between FR1 and FR2 are typically referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as the "below 6 GHz" band in various documents and articles. Similar naming issues sometimes arise for FR2, which is often (interchangeably) referred to as the "millimeter wave" (mmWave) band in documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as the "mmWave" band by the International Telecommunication Union (ITU).

[0050] In view of the above aspects, unless otherwise specifically stated, it should be understood that if the term "below 6 GHz" or the like is used herein, it can broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. In addition, unless otherwise explicitly stated, it should be understood that if used herein, the term "mmWave" or the like can broadly represent frequencies that may include mid-band frequencies, may be within FR2, or may be within the EHF band.

[0051] 5G NR devices, networks, and systems can be implemented using optimized OFDM-based waveform features. These features may include scalable parameter sets and transmit time intervals (TTIs); a common flexible framework that efficiently multiplexes services and features using dynamic, low-latency time division duplex (TDD) designs or frequency division duplex (FDD) designs; and advanced wireless technologies such as massive multiple-input multiple-output (MIMO), robust mmWave transmission, advanced channel decoding, and device-centric mobility. The scalability of parameter sets in 5G NR and the scaling of subcarrier spacing can effectively address the operation of various services across different spectrums and different deployments. For example, in various outdoor and macro coverage deployments of less than 3GHz FDD / TDD implementations, the subcarrier spacing may appear at 15kHz, such as over bandwidths of 1MHz, 5MHz, 10MHz, 20MHz, etc. For various other outdoor and small cell coverage deployments with TDD greater than 3GHz, the subcarrier spacing may appear at 30kHz over 80MHz / 100MHz bandwidth. For various other indoor broadband implementations, using TDD on the unlicensed portion of the 5GHz band, the subcarrier spacing may occur at 60kHz over a 160MHz bandwidth. Finally, for various deployments transmitting over mmWave components at 28GHz TDD, the subcarrier spacing may occur at 120kHz over a 500MHz bandwidth.

[0052] 5G NR's scalable parameter sets facilitate scalable TTIs for diverse latency and quality of service (QoS) requirements. For example, shorter TTIs can be used for low latency and high reliability, while longer TTIs can be used for higher spectral efficiency. Efficient multiplexing of long and short TTIs allows transmission to start on symbol boundaries. 5G NR also anticipates a self-contained integrated subframe design where uplink or downlink scheduling information, data, and acknowledgments are in the same subframe. The self-contained integrated subframe supports communications in unlicensed or contention-based shared spectrum, and adaptive uplink or downlink can be flexibly configured on a per-cell basis to dynamically switch between uplink and downlink to meet current business needs.

[0053] For clarity, certain aspects of the devices and techniques may be described below with reference to example 5G NR implementations or in a 5G-centric manner, and 5G terminology may be used as illustrative examples in portions of the description below; however, the description is not intended to be limited to 5G applications.

[0054] Furthermore, it should be understood that in operation, a wireless communication network adapted according to the concepts herein can operate using any combination of licensed spectrum or unlicensed spectrum depending on load and availability. Therefore, it will be apparent to one of ordinary skill in the art that the systems, devices, and methods described herein can be applied to other communication systems and applications beyond the specific examples provided.

[0055] Although various aspects and specific implementations are described in this application by the illustration of some examples, it will be understood by those skilled in the art that additional specific implementations and use cases may be generated in many other arrangements and scenarios. The innovation described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, specific implementation or use can be implemented via integrated chip specific implementation or other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail equipment or purchasing equipment, medical equipment, AI-enabled devices, etc.). Although some examples may or may not specifically point to use cases or applications, the applicability of various types of described innovations may occur. The scope of specific implementation can range from chip-level or modular components to non-modular, non-chip-level specific implementations, and further to aggregated, distributed or original equipment manufacturer (OEM) devices or systems containing one or more described aspects. In some practical environments, the equipment in combination with the various aspects and features described may also necessarily include additional components and features for implementing and practicing the various aspects claimed and described. The innovations described herein are intended to be practiced in a variety of implementations having different sizes, shapes, and configurations, including large or small devices, chip-level components, multi-component systems (e.g., radio frequency (RF) chains, communication interfaces, processors), distributed arrangements, end-user devices, etc.

[0056] Figure 1 1 is a block diagram illustrating details of an example wireless communication system according to one or more aspects. The wireless communication system may include a wireless network 100. The wireless network 100 may, for example, include a 5G wireless network. As will be appreciated by those skilled in the art, Figure 1 Components appearing in are likely to have related corresponding components in other network arrangements (including, for example, cellular-style network arrangements and non-cellular-style network arrangements (e.g., device-to-device or peer-to-peer or ad hoc network arrangements, etc.)).

[0057] Figure 1The illustrated wireless network 100 includes many base stations 105 and other network entities. A base station may be a station that communicates with a UE, and may also be referred to as an evolved Node B (eNB), a next generation eNB (gNB), an access point, etc. Each base station 105 may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to a specific geographic coverage area of ​​a base station or a base station subsystem serving the coverage area, depending on the context in which the term is used. In the specific implementation of the wireless network 100 herein, the base station 105 may be associated with the same operator or different operators (e.g., the wireless network 100 may include multiple operator wireless networks). Additionally, in the specific implementation of the wireless network 100 herein, the base station 105 may provide wireless communication using one or more frequencies (e.g., one or more frequency bands in a licensed spectrum, an unlicensed spectrum, or a combination thereof) in the same frequency as an adjacent cell. In some examples, a separate base station 105 or UE 115 may be operated by more than one network operating entity. In other examples, each base station 105 and UE 115 may be operated by a single network operating entity.

[0058] A base station may provide communication coverage for a macro cell or a small cell (e.g., a pico cell or a femto cell) or other type of cell. A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with a service subscription with a network provider. Small cells (such as pico cells) will generally cover a relatively small geographic area and may allow unrestricted access by UEs with a service subscription with a network provider. Small cells (such as femto cells) will generally also cover a relatively small geographic area (e.g., a home) and, in addition to unrestricted access, may also provide restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in a home, etc.). A base station for a macro cell may be referred to as a macro base station. A base station for a small cell may be referred to as a small cell base station, a pico base station, a femto base station, or a home base station. In Figure 1 In the example shown, base stations 105d and 105e are conventional macro base stations, while base stations 105a-105c are macro base stations implemented using one of 3-dimensional (3D), full-dimensional (FD) or massive MIMO. Base stations 105a-105c use their higher-dimensional MIMO capabilities to employ 3D beamforming in elevation and azimuth beamforming to increase coverage and capacity. Base station 105f is a small cell base station, which can be a home node or a portable access point. The base station can support one or more (e.g., two, three, four, etc.) cells.

[0059] Wireless network 100 may support synchronous or asynchronous operation. For synchronous operation, base stations may have similar frame timings, and transmissions from different base stations may be approximately aligned in time. For asynchronous operation, base stations may have different frame timings, and transmissions from different base stations may not be aligned in time. In some cases, the network may be enabled or configured to handle dynamic switching between synchronous or asynchronous operation.

[0060] UE 115 is dispersed throughout the wireless network 100, and each UE may be stationary or mobile. It should be understood that, although in the standards and specifications promulgated by 3GPP, mobile devices are generally referred to as UEs, such devices may be additionally or otherwise referred to as mobile stations (MS), subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals (AT), mobile terminals, wireless terminals, remote terminals, mobile phones, terminals, user agents, mobile clients, clients, gaming devices, augmented reality devices, vehicle components, vehicle devices or vehicle modules or some other suitable terminology by those skilled in the art. In this document, a "mobile" device or UE does not necessarily have the ability to move and may be fixed. Some non-limiting examples of mobile devices (for example) may include one or more specific implementations of UE 115, including mobile phones, cellular phones, smart phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, laptops, personal computers (PCs), notebooks, netbooks, smart books, tablet computers, and personal digital assistants (PDAs). The mobile device may additionally be an IoT or "Internet of Everything" (IoE) device, such as a car or other transportation vehicle, a satellite radio, a global positioning system (GPS) device, a global navigation satellite system (GNSS) device, a logistics controller, a drone, a multi-rotor helicopter, a quad-rotor helicopter, a smart energy or security device, a solar panel or solar array, city lighting, tap water or other infrastructure; industrial automation and enterprise equipment; consumer and wearable devices, such as glasses, wearable cameras, smart watches, health or fitness trackers, mammal implantable devices, gesture tracking devices, medical devices, digital audio players (e.g., MP3 players), cameras, game consoles, etc.; and digital home or smart home devices, such as home audio, video and multimedia devices, appliances, sensors, vending machines, smart lighting, home security systems, smart meters, etc. In one aspect, a UE may be a device including a universal integrated circuit card (UICC). In another aspect, a UE may be a device that does not include a UICC. In some aspects, a UE that does not include a UICC may also be referred to as an IoE device. Figure 1The UE 115a-115d of the specific implementation illustrated in the figure are examples of mobile smart phone type devices accessing the wireless network 100. The UE may also be a machine specially configured for connected communications (including machine type communications (MTC), enhanced MTC (eMTC), narrowband IoT (NB-IoT), etc.). Figure 1 The illustrated UEs 115e - 115k are examples of various machines that access the wireless network 100 and are configured for communication.

[0061] A mobile device, such as UE 115, may be able to communicate with any type of base station, whether macro, pico, femto, relay, etc. Figure 1 In the figure, the communication link (represented as a lightning ball) indicates the wireless transmission between the UE and the serving base station (which is a base station designated to serve the UE on the downlink or uplink) or the expected transmission between the base stations and the backhaul transmission between the base stations. The UE can operate as a base station or other network node in some scenarios. The backhaul communication between the base stations of the wireless network 100 can be carried out using wired or wireless communication links.

[0062] In operation, at the wireless network 100, base stations 105a-105c use 3D beamforming and collaborative spatial techniques (e.g., coordinated multipoint (CoMP) or multi-connectivity) to serve UEs 115a and 115b. Macro base station 105d performs backhaul communications with base stations 105a-105c and small cells (base station 105f). Macro base station 105d also transmits multicast services that are subscribed to and received by UEs 115c and 115d. Such multicast services may include mobile TV or streaming video, or may include other services for providing community information, such as weather emergencies or alerts, such as Amber alerts or gray alerts.

[0063] The wireless network 100 of the specific implementation supports mission critical communications with ultra-reliable and redundant links for mission critical devices such as UE 115e as drones. The redundant communication links with UE 115e include links from macro base stations 105d and 105e and small cell base station 105f. Other machine type devices such as UE 115f (thermometer), UE 115g (smart meter) and UE 115h (wearable device) can communicate directly with base stations such as small cell base station 105f and macro base station 105e through the wireless network 100, or in a multi-hop configuration by communicating with another user device that relays its information to the network, such as UE 115f communicating temperature measurement information to smart meter UE 115g, which then reports it to the network through small cell base station 105f. The wireless network 100 may also provide additional network efficiency through dynamic, low-latency TDD communications or low-latency FDD communications (eg, in a vehicle-to-vehicle (V2V) mesh network between UEs 115i-115k communicating with a macro base station 105e).

[0064] The base stations 105 may communicate with the core network 130 and with each other. For example, the base stations 105 may interface with the core network 130 via a backhaul link 132 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105) or indirectly (e.g., via the core network 130) via a backhaul link (e.g., via X2, Xn, or other interfaces).

[0065] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC), which may include at least one mobile management entity (MME), at least one serving gateway (S-GW), and at least one packet data network (PDN) gateway (P-GW). The MME may manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management of UEs 115 served by base stations 105 associated with the EPC. User IP packets may be delivered through the S-GW, which itself may be connected to the P-GW. The P-GW may provide IP address allocation and other functions. The P-GW may be connected to a network operator IP service. The operator IP service may include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or a packet switched (PS) streaming service.

[0066] In some implementations, the core network 130 includes or is coupled to a location management function (LMF) 131, which is an entity in the 5G core network (5GC) that supports various functionalities, such as managing support for different location services for one or more UEs. For example, the LMF 131 may include one or more servers, such as multiple distributed servers. The base station 105 may forward location messages to the LMF 131 and may communicate with the LMF via the NR Positioning Protocol A (NRPPa). The LMF 131 is configured to control the positioning parameters of the UE 115, and the LMF 131 may provide information to the base station 105 and the UE 115 so that actions can be taken at the UE 115. In some implementations, the UE 115 and the base station 105 are configured to communicate with the LMF 131 via an access and mobility management function (AMF).

[0067] Figure 2 1 is a block diagram illustrating an example of a base station 105 and a UE 115 according to one or more aspects. The base station 105 and the UE 115 may be Figure 1 For a restricted association scenario (as described above), base station 105 may be any one of the base stations in the UE and one of the UEs. Figure 1 The small cell base station 105f in the example of FIG. 105 and the UE 115 may be a UE 115c or 115d operating in the service area of ​​the base station 105f, which will be included in the list of accessible UEs of the small cell base station 105f in order to access the small cell base station 105f. The base station 105 may also be some other type of base station. Figure 2 As shown in FIG. 1 , the base station 105 may be equipped with antennas 234a through 234t and the UE 115 may be equipped with antennas 252a through 252r for facilitating wireless communication.

[0068] At the base station 105, the transmit processor 220 may receive data from the data source 212 and control information from the controller 240 (such as a processor). The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ (automatic repeat request) indicator channel (PHICH), a physical downlink control channel (PDCCH), an enhanced physical downlink control channel (EPDCCH), an MTC physical downlink control channel (MPDCCH), etc. The data may be for a physical downlink shared channel (PDSCH), etc. Additionally, the transmit processor 220 may process (e.g., encode and symbol map) the data and the control information, respectively, to obtain data symbols and control symbols. The transmit processor 220 may also generate reference symbols, such as for a primary synchronization signal (PSS) and a secondary synchronization signal (SSS), and a cell-specific reference signal. The transmit (TX) MIMO processor 230 may perform spatial processing (e.g., pre-coding) on ​​data symbols, control symbols, or reference symbols, if applicable, and may provide an output symbol stream to modulators (MODs) 232a to 232t. For example, the spatial processing performed on the data symbols, control symbols, or reference symbols may include pre-coding. Each modulator 232 may process a corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Additionally or alternatively, each modulator 232 may process the output sample stream (e.g., analog-convert, amplify, filter, and up-convert it) to obtain a downlink signal. The downlink signals from modulators 232a to 232t may be transmitted via antennas 234a to 234t, respectively.

[0069] At the UE 115, antennas 252a to 252r may receive downlink signals from the base station 105 and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a corresponding received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. The MIMO detector 256 may obtain received symbols from the demodulators 254a to 254r, perform MIMO detection on the received symbols when necessary, and provide detected symbols. The receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 115 to the data sink 260, and provide decoded control information to the controller 280 (e.g., a processor).

[0070] On the uplink, at the UE 115, the transmit processor 264 may receive and process data from a data source 262 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller 280 (e.g., for a physical uplink control channel (PUCCH)). Additionally, the transmit processor 264 may also generate reference symbols for reference signals. The symbols from the transmit processor 264 may be pre-decoded by the TX MIMO processor 266, if necessary, further processed by the modulators 254a through 254r (e.g., for SC-FDM, etc.), and transmitted to the base station 105. At the base station 105, the uplink signal from the UE 115 may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236, if necessary, and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 115. Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller 240 .

[0071] The controllers 240 and 280 may direct the operation at the base station 105 and the UE 115, respectively. The controller 240 or other processors and modules at the base station 105 or the controller 280 or other processors and modules at the UE 115 may perform or direct the execution of various processes for the techniques described herein, such as executing or directing the execution of the various processes described in the present invention. Figures 5 to 7 and Fig. 9 The execution illustrated in or other processes for the techniques described herein. Memories 242 and 282 may store data and program codes for base station 105 and UE 115, respectively. Scheduler 244 may schedule UEs for data transmission on a downlink or uplink.

[0072] In some cases, the UE 115 and the base station 105 may operate in a shared radio spectrum band, which may include licensed or unlicensed (e.g., contention-based) spectrum. In the unlicensed frequency portion of the shared radio spectrum band, the UE 115 or the base station 105 may traditionally perform a medium sensing procedure to compete for access to the spectrum. For example, the UE 115 or the base station 105 may perform a listen-before-talk or listen-before-send (LBT) procedure (such as a clear channel assessment (CCA)) before communicating to determine whether the shared channel is available. In some specific implementations, the CCA may include an energy detection procedure to determine whether there are any other active transmissions. For example, the device may infer that a change in the received signal strength indicator (RSSI) of the power meter indicates that the channel is occupied. Specifically, the signal power concentrated in a certain bandwidth and exceeding a predetermined noise floor may indicate another wireless transmitter. CCA may also include detection of a specific sequence indicating the use of the channel. For example, another device may send a specific preamble before sending a data sequence. In some cases, the LBT procedure may include the wireless node adjusting its own backoff window based on the amount of energy detected on the channel or acknowledgement / negative acknowledgement (ACK / NACK) feedback for its own transmitted packets (as a manifestation of a collision).

[0073] Figure 3 A diagram illustrating an example decomposed base station 300 architecture is shown. The decomposed base station 300 architecture may include one or more central units (CUs) 310 that may communicate directly with a core network 320 via a backhaul link, or indirectly with the core network 320 through one or more decomposed base station units, such as a near real-time (near-RT) RAN intelligent controller (RIC) 325 via an E2 link, or a non-real-time (non-RT) RIC 315 associated with a service management and orchestration (SMO) framework 305, or both. The CU 310 may communicate with one or more distributed units (DUs) 330 via respective midhaul links, such as an F1 interface. The DU 330 may communicate with one or more radio units (RUs) 340 via respective fronthaul links. The RU 340 may communicate with respective UEs 115 via one or more radio frequency (RF) access links. In some implementations, a UE 115 may be served simultaneously by multiple RUs 340.

[0074] Each of the units (i.e., CU 310, DU 330, RU 340, and near-RT RIC 325, non-RT RIC 315, and SMO framework 305) may include or be coupled to one or more interfaces configured to receive or send signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the 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 or send signals to one or more of the other units via a wired transmission medium. Additionally, these units may include a wireless interface that may include a receiver, transmitter, or transceiver (such as a radio frequency (RF) transceiver) that is configured to receive or send signals, or both, to one or more of the other units on a wireless transmission medium.

[0075] In some aspects, CU 310 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 configured to communicate signals with other control functions hosted by CU 310. CU 310 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 310 may be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU 310 may be implemented to communicate with DU 330 for network control and signaling.

[0076] DU 330 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RU 340. In some aspects, DU 330 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.) at least in part according to a functional split such as those defined by the 3rd Generation Partnership Project (3GPP). In some aspects, DU 330 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 330 or with control functions hosted by CU 310.

[0077] The lower layer functionality may be implemented by one or more RUs 340. In some deployments, a RU 340 controlled by a DU 330 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 a functional split (such as a lower layer functional split). In such an architecture, the RU 340 may be implemented to handle over-the-air (OTA) communications with one or more UEs 115. In some implementations, real-time and non-real-time aspects of control plane and user plane communications with the RU 340 may be controlled by the corresponding DU 330. In some scenarios, this configuration may enable the implementation of the DU 330 and the CU 310 in a cloud-based RAN architecture (such as a vRAN architecture).

[0078] The SMO framework 305 may be configured to support RAN deployment and configuration of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 305 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 305 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 390) 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 310, DU 330, RU 340, and near-RT RIC 325. In some specific implementations, the SMO framework 305 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 311) via the O1 interface. Additionally, in some specific implementations, the SMO framework 305 may communicate directly with one or more RUs 340 via the O1 interface. The SMO framework 305 may also include a non-RT RIC 315 configured to support the functionality of the SMO framework 305 .

[0079] The non-RT RIC 315 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 325. The non-RT RIC 315 may be coupled to or in communication with the near-RT RIC 325 (such as via an A1 interface). The near-RT RIC 325 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 310, one or more DUs 330, or both, and the O-eNB with the near-RT RIC 325.

[0080] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 325, the non-RT RIC 315 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 325 and may be received from a non-network data source or from a network function at the SMO framework 305 or the non-RT RIC 315. In some examples, the non-RT RIC 315 or the near-RT RIC 325 may be configured to adjust RAN behavior or performance. For example, the non-RT RIC 315 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 305 (such as via reconfiguration of O1) or via the creation of RAN management policies (such as A1 policies).

[0081] As described herein, a node (which may be referred to as a node, a network node, a network entity, or a wireless node) may include, may be, or may be included in (e.g., as a component of) a base station (e.g., any base station described herein), a transmit receive point (TRP), a UE (e.g., any UE described herein), a network controller, an apparatus, a device, a computing system, an integrated access and backhaul (IAB) node, a distributed unit (DU), a central unit (CU), a remote unit (RU), a core network, an LFM, and / or another processing entity configured to perform any of the techniques described herein. For example, the network node may be a UE. For another example, the network node may be a base station or a network entity. As another example, a first network node may be configured to communicate with a second network node or a third network node. In one aspect of this example, the first network node may be a UE, the second network node may be a base station, and the third network node may be a UE. In another aspect of this example, the first network node may be a UE, the second network node may be a base station, and the third network node may be a base station. In yet other aspects of this example, the first network node, the second network node, and the third network node may be different relative to these examples. Similarly, references to UE, base station, device, equipment, computing system, etc. may include disclosure of UE, base station, device, equipment, computing system, etc. as a network node. For example, a disclosure that a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node. Consistent with the present disclosure, once a specific example is expanded according to the present disclosure (e.g., a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node), a broader example of a narrower example may be interpreted in reverse, but in a broad, open-ended manner. In the above example that a UE is configured to receive information from a base station also discloses that a first network node is configured to receive information from a second network node, the first network node may refer to a first UE, a first base station, a first device, a first device, a first computing system, a first one or more components, a first processing entity, etc. configured to receive information; and the second network node may refer to a second UE, a second base station, a second device, a second device, a second computing system, a second one or more components, a second processing entity, etc.

[0082] As described herein, different terms may be used in various aspects to describe the transmission of information (e.g., any information, signal, etc.). Disclosure of one communication term includes disclosure of other communication terms. For example, a first network node may be described as being configured to send information to a second network node. In this example and consistent with the present disclosure, disclosure that the first network node is configured to send information to the second network node includes disclosure that the first network node is configured to provide, send, output, transmit, or send information to the second network node. Similarly, in this example and consistent with the present disclosure, disclosure that the first network node is configured to send information to the second network node includes disclosure that the second network node is configured to receive, obtain, or decode information provided, sent, output, transmitted, or sent by the first network node.

[0083] Figure 4 4 is a block diagram of an example wireless communication system 400 that supports power control for positioning according to one or more aspects. In some examples, the wireless communication system 400 can implement aspects of the wireless network 100. The wireless communication system 400 includes UE 115, UE 415, UE 41, base station 105, base station 455, and core network 130. Although three UEs 115 and two base stations are shown, in some other implementations, the wireless communication system 400 may include a different number of UEs, a different number of base stations (e.g., zero, one, or more than one base station, or a combination thereof). In some implementations, the wireless communication system 400 may include one or more TRPs.

[0084] UE 115 may be configured to perform Uu communication, SL communication, or a combination thereof. UE 115 may include various components (such as structural components, hardware components) for performing one or more functions described herein. For example, these components may include one or more processors 402 (hereinafter collectively referred to as "processor 402"), one or more memory devices 404 (hereinafter collectively referred to as "memory 404"), one or more transmitters 416 (hereinafter collectively referred to as "transmitter 416"), and one or more receivers 418 (hereinafter collectively referred to as "receiver 418"). In some specific implementations, UE 115 may include an interface (e.g., a communication interface) including a transmitter 416, a receiver 418, or a combination thereof. Processor 402 may be configured to execute instructions 405 stored in memory 404 to perform the operations described herein. In some specific implementations, processor 402 includes or corresponds to one or more of receiving processor 258, transmitting processor 264, and controller 280, and memory 404 includes or corresponds to memory 282.

[0085] The memory 404 includes or is configured to store instructions 405, measurement information 406, and transmit power information. The measurement information 406 may include or indicate information associated with one or more received signals or waveforms, such as one or more signals or waveforms received by UE 115, one or more signals or waveforms received by another device, such as UE 415, UE 417, base station 105, or base station 455. For illustration, for a received signal or waveform, the measurement information 406 may include or indicate an error rate, a reference signal received power (RSRP), a received signal strength (RSS), a received signal strength indicator (RSSI), a reference signal received quality (RSRQ), or a combination thereof.

[0086] The transmit power information 407 may include or correspond to Tx power for Uu communication, Tx power for SL communication, a change in Tx power, an increase or decrease in Tx power, an amount of Tx power change, a path loss value (e.g., a UE-UE path loss value, a UT-TRP path loss value, or a combination thereof), an SRS configuration associated with SL communication, one of a plurality of path loss schemes, a group of one or more UEs, a group of one or more base stations, a group of one or more TRPs, positioning information, or a combination thereof. In some implementations, the transmit power information 407 may include or indicate one or more UE capabilities or UE parameters, such as a UE power level.

[0087] The transmitter 416 is configured to send reference signals, control information, and data to one or more other devices, and the receiver 418 is configured to receive reference signals, synchronization signals, control information, and data from one or more other devices. For example, the transmitter 416 may send signaling, control information, and data to the base station 105, and the receiver 418 may receive signaling, control information, and data from the base station. In some implementations, the transmitter 416 and the receiver 418 may be integrated into one or more transceivers. Additionally or alternatively, the transmitter 416 or the receiver 418 may include or correspond to a reference signal. Figure 2 One or more components of UE 115 are described.

[0088] UE 415 may include one or more components as described herein with reference to UE 115. Additionally, UE 415 may be configured to perform one or more operations as described herein with reference to UE 115.

[0089] UE 417 may include one or more components as described herein with reference to UE 115. Additionally, UE 417 may be configured to perform one or more operations as described herein with reference to UE 115 or UE 415.

[0090] The base station 105 may include various components (such as structural components, hardware components) for performing one or more functions described herein. For example, these components may include one or more processors 452 (hereinafter collectively referred to as "processor 452"), one or more memory devices 454 (hereinafter collectively referred to as "memory 454"), one or more transmitters 456 (hereinafter collectively referred to as "transmitters 456"), and one or more receivers 458 (hereinafter collectively referred to as "receivers 458"). In some specific implementations, the base station 105 may include an interface (e.g., a communication interface) including the transmitter 456, the receiver 458, or a combination thereof. The processor 452 may be configured to execute instructions 460 stored in the memory 454 to perform the operations described herein. In some specific implementations, the processor 452 includes or corresponds to one or more of the receiving processor 238, the transmitting processor 220, and the controller 240, and the memory 454 includes or corresponds to the memory 242.

[0091] The memory 454 includes or is configured to store instructions 460, measurement information 462, and transmit power information 464. The measurement information 462 may include or correspond to the measurement information 406. The measurement information 462 may include or indicate information associated with one or more received signals or waveforms, such as one or more signals or waveforms received by the base station 105, one or more signals or waveforms received by another device, such as the UE 115, the UE 415, the UE 417, or the base station 455. For example, for the received signal or waveform, the measurement information 462 may include or indicate an error rate, RSRP, RSS, RSSI, RSRQ, or a combination thereof.

[0092] The transmit power information 464 may include or correspond to Tx power for Uu communication, Tx power for SL communication, a change in Tx power, an increase or decrease in Tx power, an amount of Tx power change, a path loss value (e.g., a UE-UE path loss value, a UT-TRP path loss value, or a combination thereof), an SRS configuration associated with SL communication, one of multiple path loss schemes, a group of one or more UEs, a group of one or more base stations, a group of one or more TRPs, positioning information, or a combination thereof.

[0093] The transmitter 456 is configured to send reference signals, synchronization signals, control information, and data to one or more other devices, and the receiver 458 is configured to receive reference signals, control information, and data from one or more other devices. For example, the transmitter 456 may send signaling, control information, and data to the UE 115, and the receiver 458 may receive signaling, control information, and data from the UE. In some implementations, the transmitter 456 and the receiver 458 may be integrated into one or more transceivers. Additionally or alternatively, the transmitter 456 or the receiver 458 may include or correspond to a reference signal. Figure 2 One or more components of the described base station 105, or one or more components of the decomposed base station 300.

[0094] The base station 455 may include one or more components as described herein with reference to the base station 105. Additionally, the base station 455 may be configured to perform one or more operations as described herein with reference to the base station 105.

[0095] The core network 130 may include a 4G core network, a 5G core, an evolved packet core (EPC). The core network may be coupled (such as communicatively coupled) to a base station 105 or 455, a UE 115, 415 or 417, or a combination thereof. The core network 130 may include or correspond to an LMF 131. Although shown and described as being included in the core network 130, in some specific implementations, the LMF 131 may be different from the core network 130. For example, the LMF 131 may include one or more servers, such as a plurality of distributed servers. The LMF 131 may be configured to support various functionalities, such as managing support for different location services for one or more UEs. For example, the LMF 131 is configured to control the positioning parameters of the UE 115, and the LMF 131 may provide information to the base station 105 and the UE 115 so that an action may be taken at the UE 115. The base station 105 may forward the location message to the LMF 131, and may communicate with the LMF 131 via the NR Positioning Protocol A (NRPPa). In some implementations, the UE 115 and the base station 105 are configured to communicate with the LMF 131 via an access and mobility management function (AMF).

[0096] In some implementations, the wireless communication system 400 implements a 5G NR network. For example, the wireless communication system 400 may include a plurality of 5G-capable UEs 115, 415, or 417 and a plurality of 5G-capable base stations 105 or 455, such as UEs and base stations configured to operate according to a 5G NR network protocol, such as defined by 3GPP.

[0097] During operation of the wireless communication system 400, the Tx power of a UE (such as UE 115, 415, or 417) used for Uu communication, SL communication may be controlled by the UE or by a base station (such as base station 105 or base station 455). For example, SL communication may include SL positioning. In some implementations, the Tx power of the UE may be jointly controlled for Uu communication and SL communication (e.g., SL positioning). In some implementations, the UE may determine the Tx power based on a SL path loss value, feedback from another UE participating in SL communication with the UE in SL communication, or a combination thereof. Additionally or alternatively, the UE may be configured to adjust Tx power, resource allocation (e.g., the number of symbols for each SL positioning instance of a SL positioning session), or a combination thereof. For example, in some implementations, feedback associated with SL communication may enable the UE to adjust Tx power, resource allocation (e.g., the number of symbols for each SL positioning instance of a SL positioning session), or a combination thereof. In some implementations, the base station may be configured to receive or determine measurements, such as SL channel measurements, Uu channel measurements, or a combination thereof, and signal or configure Tx power for one or more UEs. For illustration, the measurements may include or correspond to path loss estimates or path loss values, and the base station may determine Tx power based on the path loss estimates or path loss values. In some implementations, the operations described herein may be associated with or correspond to a UE that is within the coverage of a base station or outside the coverage of a base station (e.g., within the coverage area of ​​a base station or outside the coverage area of ​​a base station).

[0098] In some implementations, UE 115 may determine the Tx power for SL communication during a discovery phase (such as a SL discovery phase). For example, the Tx power associated with SL communication may be the Tx power used for SL positioning, such as the Tx power used for the SL SRS positioning signal 470. The discovery phase may or may not be part of a SL positioning session. UE 115 may determine the Tx power for SL communication based on communications sent using Tx powers during the discovery phase (e.g., sent by UE 115 using Tx powers known to one or more other UEs or sent by another UE (different from UE 115) using Tx powers known to UE 115 and received by UE 115).

[0099] In some implementations, when UE 115 determines the Tx power during the discovery phase, UE 115 may be out of coverage of base station 105 and base station 455. For illustration, UE 115 may receive SL communications (such as SL discovery communications) from another UE (such as UE 415 or UE 417). The SL communications received by UE 115 may be sent using a Tx power known to UE 415, such as by UE 115 or UE 417. For example, the Tx power may be determined or established during the discovery phase, or may be defined by a standard. UE 115 may determine the Tx power used for SL positioning based on the received SL communications sent using the known Tx power. For example, SL communications may be received from UE 415, and UE 115 may determine a path loss value of a SL channel between UE 115 and UE 415 based on the received SL communications, the Tx power used to send the SL communications, or a combination thereof. For illustration, the UE 115 may determine a received signal strength (RSS) based on the received SL communication, and may determine a path loss value associated with the SL communication channel based on the RSS and the Tx power of the sent SL communication. In some implementations, the path loss value may be an estimated path loss value. The UE 115 may determine a Tx power associated with the SL communication (e.g., a Tx power used for SL positioning) based on the path loss value. The UE 115 may send a SL SRS positioning signal 470 using the determined Tx power. For example, the UE 115 may send the SL SRS positioning signal 470 to one or more UEs from which the UE 115 receives SL communications (such as SL communications received during the discovery phase).

[0100] In some specific implementations, UE 115 may receive multiple SL communications (communications each transmitted using a known Tx power) during the discovery phase and may determine the Tx power used for SL positioning based on the received multiple SL communications. For illustration, UE 115 may determine the path loss values ​​of the multiple received SL communications as a maximum path loss value, a minimum path loss value, an average path loss value, a mode path loss value, a median path loss value, a path loss value range, or a combination thereof. As an illustrative example, UE 115 may receive a first SL communication from UE 415 and a second SL communication from UE 417. UE 115 may determine a first path loss value associated with UE 415 and may determine a second path loss value associated with UE 417. UE 115 may determine the Tx power used for SL positioning based on the first path loss value, the second path loss value, or a combination thereof. UE 115 may send SL SRS positioning signal 470 using the determined Tx power. For example, UE 115 may send SL SRS positioning signal 470 to one or more UEs from which UE 115 received SL communications (such as SL communications received during the discovery phase).

[0101] In some implementations, the discovery phase may be part of a round trip time (RTT) positioning operation. During the RTT positioning operation, UE 115 may send a first message at a first Tx power (such as a high Tx power or a known Tx power). Another UE (such as UE 415) may receive the first message and send a second message to UE 115. For illustration, UE 415 may determine a first path loss value based on the first Tx power, the first message, the RSS of the first message, or a combination thereof. The first path loss value may be an estimated path loss value. In some implementations, UE 415 sends the second message using a reduced power (compared to the first Tx power). The reduced power (such as the second Tx power) may be determined by UE 415 based on the first path loss value associated with the first message. In some implementations, the second message may include or indicate the first path loss value, the second Tx power, or a combination thereof. UE 115 may send one or more additional messages, such as one or more SL positioning signals, using a third Tx power determined based on the first path loss value, the second message, the second Tx power, the RSS of the second message, or a combination thereof.

[0102] In some implementations, the discovery phase may be part of a bilateral RTT positioning operation. During the bilateral RTT positioning operation, UE 115 may send a first message at a first Tx power (such as a high Tx power or a known Tx power). Another UE (such as UE 415) may receive the first message and send a second message to UE 115. For illustration, UE 415 may send a second message using a first Tx power (such as a high Tx power or a known Tx power). UE 115 may determine the second Tx power based on the second message sent using the first Tx power. For example, UE 115 may determine a path loss value based on the second message, the first Tx, or a combination thereof. For illustration, UE 115 may determine an RSS based on the second message and may determine a path loss value based on the RSS. In some implementations, the path loss value may be an estimated path loss value. UE 115 may determine to use the second Tx power to send a third message of the bilateral RTT positioning operation.

[0103] In some implementations, UE 115 may determine an SRS configuration for SL communication. In some implementations, when UE 115 determines the SRS configuration for SL communication, UE 115 may be outside the coverage of base station 105 and base station 455. The SRS configuration may include or indicate a SL Tx power (e.g., SL Tx power for SL positioning), a number of symbols (e.g., a number of OFDM symbols per instance), or a combination thereof. In some implementations, a first SRS configuration for SL communication includes or indicates a first Tx power for SL communication and a first number of symbols for each SL positioning instance associated with a SL positioning session. UE 115 may send a SL SRS location signal 470 based on the first SRS configuration. Additionally or alternatively, UE 115 may receive a SL SRS location signal 470 sent by another UE (e.g., UE 415 or UE 417) based on the first SRS configuration.

[0104] In some implementations, a UE (such as UE 115 or UE 415) may be configured to perform joint power and resource adaptation. For illustration, UE 115 or UE 415 may select or adjust a first SRS configuration to change the SL Tx power, the number of symbols, or a combination thereof. For example, the UE may increase the number of symbols so that the SL SRS location signal (e.g., 470) has a larger range, increase the SL Tx power so that the SL SRS location signal (e.g., 470) has a larger range, or a combination thereof.

[0105] In some implementations, UE 115 may establish one or more resource and power configurations with another UE (such as UE 415) during a SL connection establishment or SL discovery phase. For illustration, during a SL connection establishment or SL discovery phase, UE 115 and UE 415 may agree on one or more resource and power configurations. One of UE 115 or UE 415 may signal a selection of a first SRS configuration based on the one or more resource and power configurations. For example, a unicast, multicast, or groupcast RRC may be used to signal the first SRS configuration. After sending an indication of the selection of the first SRS configuration, UE 115 may send or receive a SL SRS position signal 470 based on the first SRS configuration.

[0106] After signaling the first SRS configuration, UE 115 and UE 415 may perform SL communication, such as SL positioning, based on the first SRS configuration. In some specific implementations, UE 115 or UE 415 may change the SRS configuration to a second SRS configuration. For example, UE 115 may select or determine the second SRS configuration based on one or more resource and power configurations agreed upon by UE 115 and UE 415. UE 115 may signal the selection of the second SRS configuration to UE 415. For example, a unicast, multicast, or groupcast MAC-CE may be used to signal the second SRS configuration. MAC-CE may be configured for SL positioning (e.g., SL power control) and may be independent of data power control. After sending an indication of the selection of the second SRS configuration, UE 115 may send or receive a SL SRS position signal 470 based on the first SRS configuration.

[0107] In some implementations, such as when one or more UEs are within the coverage of a base station (e.g., 105), the base station may receive SL path loss values ​​from the one or more UEs and determine Tx power for the one or more UEs. For example, the SL path loss value may include or correspond to path loss information 474. Tx power may be used for Uu communication, side link communication (e.g., SL positioning), or both Uu communication and SL communication. The base station may indicate Tx power to one or more UEs. For example, Tx power may be included or indicated by Tx power information 472.

[0108] In some implementations, the UE may determine or estimate path loss values ​​for one or more other UEs and transmit the path loss values ​​to the base station. For illustration, the UE 115 may determine a first parameter associated with the UE 415 and a second parameter associated with the UE 417. For example, the UE 115 may determine the first path loss value and the second path loss value based on a SL connection establishment, a SL discovery phase, or a SL positioning session (such as a SL instance of a SL positioning session). In some implementations, the first path loss value or the second path loss value may be an estimated path loss value. The UE 115 may generate and send path loss information 474 including or indicating the first path loss value, the second path loss value, a third path loss value based on the first path loss value and the second path loss value, or a combination thereof. In some implementations, the path loss information 474 may include or correspond to the measurement information 406, the transmit power information 407, or a combination thereof. The base station 105 may receive the path loss information 474 and determine the Tx power (eg, for Uu communication, SL communication, or both) of one or more UEs (eg, UE 115, UE 415, UE 417, or a combination thereof).

[0109] In some implementations, multiple UEs may be configured to perform a positioning session including multiple instances (such as periodic instances or sequential instances) of positioning signaling. Additionally or alternatively, multiple UEs may be configured to perform periodic positioning sessions, each periodic positioning session including one or more instances. In a first or initial positioning instance, UE 115 may be configured to send a SL SRS location signal 470 using a default transmit power. At the end of the first or initial instance, one or more UEs (such as UE 415 or UE 417) that receive the SL SRS location signal 470 report back to UE 115 a value or indication of the SRS location measurement, the RSRP of the received SLSRS location signal 470, or a combination thereof. UE 115 may include the information received from one or more UEs and include the information in the path loss information 474 transmitted by UE 115 to base station 105. Base station 105 may receive path loss information 474 and determine a path loss value for each UE SL channel, for example, a UE-UE link path loss value. Additionally, the base station 105 may monitor the transmissions of one or more UEs and determine a path loss value between each UE and the base station 105, such as a UL path loss value.

[0110] The base station 105 may determine the Tx power for one or more UEs (for Uu communication, side link communication, or both Uu and SL communication) based on one or more UE-UE link path loss values, one or more UL path loss values, or a combination thereof. For example, the base station 105 may determine the Tx power for UE 115, UE 415, UE 417, or a combination thereof. The base station 105 may send Tx power information including or indicating the Tx power for one or more UEs. In some specific implementations, each of the one or more UEs receives Tx power information 472. The Tx power information 472 may include or indicate a single Tx power for each of the one or more UEs, or may include or indicate a corresponding Tx power for the UE for each of the one or more UEs. The one or more UEs may use the Tx power for subsequent positioning instances of the SL positioning session.

[0111] In some specific implementations, the above-mentioned techniques for UEs within the coverage range may be repeated for one or more positioning instances (such as, each positioning instance, every other positioning instance, a group of positioning instances, etc.). For illustration, the above-mentioned techniques may be applied or repeated for another positioning instance (e.g., a second positioning instance) after the first positioning instance. One or more UEs may report RSRP values ​​associated with the second positioning instance, and the base station 105 may update the Tx power of one or more UEs. The base station 105 may send updated Tx power to one or more UEs. For example, the base station 105 may send Tx power information 472 including or indicating the updated Tx power. In some specific implementations, the Tx power information 472 may include a transmit power control (TPC) command. Additionally or alternatively, the Tx power information 472 may be communicated to one or more UEs via RRC, MAC CE, or DCI.

[0112] In some implementations, in order to update the Tx power, the Tx power information 472 may include or indicate the updated power value. Additionally or alternatively, the Tx power information 472 may include or indicate a power increment / decrement value, an increment / decrement step size, or a combination thereof. Additionally or alternatively, the Tx power information 472 may indicate an adjustment value of + / -x dB, where x may belong to a predefined range. In some implementations, in order to minimize signaling overhead, x may be only a single defined value, and the Tx power information 472 may include a single bit to indicate whether it is incremented (e.g., a bit value of 1) or decremented (e.g., a bit value of 0). Note that if the base station 105 determines to maintain the Tx power (e.g., not to update the Tx power), the base station 105 does not transmit the Tx power information 472.

[0113] In some implementations, such as when the UE is within the coverage of a base station (e.g., 105), the base station may indicate a scheme (of one or more schemes) for the UE to determine the Tx power (such as the SP SRS location signal transmit power) for SL positioning. For example, the base station 105 may select a path loss scheme from a plurality of path loss schemes for the UE 115. The base station 105 may send Tx power information 472 including a path loss scheme indicator for the selected scheme. The plurality of path loss schemes may include a SL path loss scheme, a UL path loss scheme, a joint SL and UL path loss scheme, or a combination thereof. The UE 115 may receive the Tx power information 472 and determine the scheme indicated by the path loss scheme indicator.

[0114] In some implementations, the path loss scheme indicator may indicate a SL path loss scheme. For the SL path loss scheme, the UE 115 may be configured to determine the Tx power used for SL communication during the discovery phase (e.g., the SL discovery phase) based on RTT or based on bilateral RTT, as described above.

[0115] In some embodiments, the path loss scheme indicator may indicate a UL path loss scheme. For the UL path loss scheme, UE 115 may be configured to identify or determine the Uu link path loss and determine the Tx power for SL positioning based on the Uu link path loss. For example, UE 115 may consider one or more Uu link path losses and the Tx power for SL positioning independent of one or more SL links (e.g., the path loss of one or more SL links). Note that another UE (e.g., UE 415 or UE 417) performing SL communication (such as SL positioning) with UE 115 may be configured with protection symbols to enable the other UE to adjust its automatic gain control (AGC). Therefore, even if UE 115 determines the Tx power for SL positioning based on the Uu link path loss, the other UE may be able to adjust and perform SL positioning with UE 115, even if the Tx power used for SL positioning is higher than the Tx power that the other UE expects to use for SL communication.

[0116] In some specific implementations, the path loss scheme indicator may indicate a joint SL and UL path loss scheme. For the joint SL and UL path loss scheme, the UE 115 may be configured to determine the Tx power for SL positioning based on a set of one or more TRPs, a set of one or more UEs, or a combination thereof. A set of one or more TRPs may be selected by the UE 115 or selected by the base station 105 and indicated to the UE 115 using the Tx power information 472. Additionally or alternatively, a set of one or more UEs may be selected by the UE 115 or selected by the base station 105 and indicated to the UE 115 using the Tx power information 472. For each of the one or more TRPs or for each of the one or more UEs, the UE 115 may determine a corresponding path loss value, such as a UE-TRP path loss value or a UE-UE path loss value. The UE 115 may determine the TX power for SL communication (e.g., SL positioning) based on the UE-TRP path loss value, the UE-UE path loss value, or a combination thereof.

[0117] Note that the scheme selected or indicated by the base station 105 prioritizes a certain type of positioning measurements. For example, a UL path loss scheme may prioritize network-based measurements over SL-based measurements. As another example, a SL path loss scheme may prioritize SL-based measurements over network-based measurements. Additionally, in the SL path loss scheme, the SL link is optimized and the Uu link may be used on a best effort basis, which is possible based on the TRP or base station having the processing capability and can receive or monitor the SL link at a lower receive power (e.g., multi-antenna processing gain). As another example, a joint SL and UL path loss scheme may prioritize the balance between SL-based measurements and network-based measurements.

[0118] In some implementations, the base station 105 may indicate Tx power for SL positioning of the UE 115 and the UE 415. For example, the Tx power information 472 may be used to indicate a first Tx power for the UE 115 and a second Tx power for the UE 415. In some implementations, the UE 115 and the UE 415 may have a location unknown to the base station 105. Positioning may be performed by the UE 115, the UE 415, or both based on the first Tx power and the second Tx power. In some implementations, positioning may be performed using SL SRS positioning signaling. Note that the base station 105 may be configured to monitor the SL channel to detect and measure one or more SL SRS location signals.

[0119] In some implementations, the first Tx power may be high power so that the SL SRS location signal sent by UE 115 can be received by one or more TRPs, such as base station 105. Conversely, the second Tx may be low power so that the SL SRS location signal sent by UE 415 can be used to estimate the range (e.g., distance and angle) between UE 115 and UE 415, but may not be received by one or more TRPs.

[0120] The base station 105 may receive or determine path loss information (e.g., UE-UE path loss value, UE-TRP path loss value, or a combination thereof) based on the SL SRS location signal sent by the UE 115 and the SL SRS location signal sent by the UE 415. Based on the SL SRS location signals of the UEs 115 and 415, the path loss information, or a combination thereof, the base station 105 may determine the positioning of the UE 115, the UE 415, or a combination thereof. In some implementations, the base station 105 may combine the received signals from the two transmissions and simultaneously determine the positions of both the UEs 115 and 415. By determining the Tx power for SL positioning and indicating it to the UE 115 and the UE 415, the base station 105 is able to enable only one UE to transmit at high power and limit network interference and power consumption.

[0121] In some implementations, one or more operations described herein may be performed by the core network 130, the LMF 131, or a combination thereof. For illustration, to enable one or more operations at the core network 130 or the LMF 131, the base station 105 may send Uu or SL information 476 to the core network or the LMF 131. The Uu or SL information 476 may include or correspond to the measurement information 462, the transmit power information, the Tx power information 472, the path loss information 474, or a combination thereof. The core network 130 or the LMF 131 may be configured to perform at least one operation based on the Uu or SL information 476. The at least one operation may include or correspond to the operation described herein with at least reference to the base station 105 or the base station 455. Additionally, the core network or the LMF 131 may be configured to send additional information to the base station 105, the base station 455, the UE 115, the UE 415, the UE 417, or a combination thereof. The additional information may include or correspond to the Tx power information 472. For example, the additional information may include or indicate Tx power used for Uu communication, Tx power used for SL communication, a change in Tx power, an increase or decrease in Tx power, an amount of Tx power change, a path loss value (e.g., a UE-UE path loss value, a UT-TRP path loss value, or a combination thereof), an SRS configuration associated with SL communication, one of multiple path loss schemes, a group of one or more UEs, a group of one or more base stations, a group of one or more TRPs, positioning information, or a combination thereof.

[0122] As reference Figure 4 As described, the present disclosure provides techniques for power control for positioning. Techniques for power control for positioning such as SL positioning, Uu positioning, or both SL positioning and Uu positioning may allow or enable optimized positioning sessions involving both PC5 and Uu links. For example, the base station 105, the core network 130, or the LMF 131 may optimize one or more positioning sessions including a PC5 link, a Uu link, or a combination thereof. Additionally, determining and signaling appropriate power values ​​for optimizing received signals on both the Uu link and the PC5 link may improve received signal quality, final positioning estimates, or a combination thereof. These techniques may also reduce UE power by selecting a Tx power for SL communication optimized for a positioning session, based on the current UE power state, or a combination thereof.

[0123] Figure 5 5 is a flow chart illustrating an example process 500 for supporting power control for positioning according to one or more aspects. The operations of process 500 may be performed by a UE (such as the one described above with reference to Figures 1 to 4 UE 115, UE 415, UE 417, reference Figure 8 For example, the example operations (also referred to as "blocks") of process 500 may enable UE 115 to support power control for positioning.

[0124] In block 502, the UE receives a path loss scheme indicator from a network entity. For example, the network entity may include or correspond to one or more components of the core network 130, the LMF 131, the decomposed base station 300, the base station 105, the base station 455, or the TRP. Additionally or alternatively, the path loss scheme indicator may include or correspond to the Tx power information 472. The path loss scheme indicator may indicate one of a plurality of path loss schemes. For example, the plurality of path loss schemes may include a SL path loss scheme, a UL path loss scheme, a joint SL and UL path loss scheme, or a combination thereof.

[0125] In block 504, the UE determines a first Tx power for a SL positioning session conducted by the first UE based on the scheme indicated by the path loss scheme indicator. The first TX power may include or correspond to the transmit power information 407. In some implementations, during the SL positioning session, the UE may transmit a SL SRS location signal, such as the SL SRS location signal 470.

[0126] In some specific implementations, a scheme indicated by the indicator includes a SL path loss scheme. Process 500 may also include the UE performing a SL discovery phase with one or more UEs. During the SL discovery phase, for each UE in the one or more UEs, the UE may receive a first message from the UE. The first message may be sent by the UE using a second Tx power. In some specific implementations, the second Tx power is a default Tx power, such as a Tx power defined by a standard. Additionally, during the SL discovery phase, for each UE in the one or more UEs, the UE may determine a received power associated with a first message from the UE and determine a path loss value based on the first message from the UE, thereby determining the first Tx power based on the path loss value of one or more UEs.

[0127] In some implementations, a scheme indicated by the indicator includes a UL path loss scheme. Process 500 may also include the UE determining a path loss value for each of the one or more TRPs based on Uu communication between the first UE and the TRP. The one or more TRPs may include or correspond to base station 105, base station 455, or a combination thereof. The path loss value may include or correspond to measurement information 406. Additionally, the UE may determine a first Tx power based on the path loss values ​​of the one or more TRPs and independently of the SL communication performed by the first UE.

[0128] In some specific implementations, a scheme indicated by the indicator includes a joint SL and UL path loss scheme. Process 500 may also include the UE determining first path loss information based on Uu communication between the first UE and a group of one or more TRPs. The first path loss information may include or correspond to measurement information 406. A group of one or more TRPs may include or correspond to base station 105, base station 455, another TRP, or a combination thereof. A group of one or more TRPs may be selected by the UE from a group of one or more available TRPs, or selected and indicated to the UE by a network entity such as base station 105, base station 455, core network 130, or LMF 131. The UE may also determine second path loss information based on SL communication between the first UE and a group of one or more UEs. The second path loss information may include or correspond to measurement information 406. A group of one or more UEs may include or correspond to UE415, UE 417, another UE, or a combination thereof. The UE may determine a first Tx power based on the first path loss information, the second path loss information, or a combination thereof. In some specific implementations, the UE may determine a first Tx power based on the first path loss information and the second path loss information. A group of one or more UEs may be selected by the UE from a group of one or more available UEs, or may be selected by a network entity such as base station 105, base station 455, core network 130, or LMF 131 and indicated to the UE.

[0129] Figure 6 600 is a flow chart illustrating an example process 600 for supporting power control for positioning according to one or more aspects. The operations of process 600 may be performed by a UE (such as the one described above with reference to Figures 1 to 4 UE 115, UE 415, UE 417, reference Figure 8 For example, the example operations (also referred to as "blocks") of process 600 may enable UE 115 to support power control for positioning.

[0130] In block 602, the UE identifies a first Tx power based on one or more SL messages between the first UE and one or more UEs. The first Tx power may include or correspond to transmit power information 407. The one or more UEs may include or correspond to UE 415, UE 417, another UE, or a combination thereof. The first Tx power may be based on a first path loss value between the first UE and a second UE in the one or more UEs. The first path loss value may include or correspond to measurement information 406.

[0131] In block 604, the UE transmits a SL SRS location signal based on the first Tx power. For example, the SL SRS location signal may include or correspond to the SL SRS location signal 470. The SL SRS location signal may be unicast, multicast, or broadcast.

[0132] In some specific implementations, the UE may perform a SL discovery phase with the one or more UEs. During the SL discovery phase, for each of the one or more UEs, the UE may receive a first message from the UE. The first message may be sent using a second Tx power. In some specific implementations, the second Tx power is a default Tx power, such as a Tx power defined by a standard. Additionally, for each of the one or more UEs, the UE may determine a received power associated with a first message from the UE and determine a path loss value based on the first message from the UE. The received power or path loss value may include or correspond to measurement information 406. In some specific implementations, in order to identify a first TX power, the UE may determine the first Tx power based on at least one path loss value associated with the one or more UEs. For illustration, the first path loss may be determined as a maximum value, a minimum value, or an average value based on at least one path loss value associated with the one or more UEs.

[0133] In some specific implementations, one or more SL messages are associated with an RTT positioning operation. Process 600 may also include the UE performing an RTT positioning operation with a second UE. During the RTT positioning operation, the UE may send a first message in one or more SL messages. The first message may be sent to the second UE using a second Tx power. In some specific implementations, the second Tx power is a default Tx power, such as a Tx power defined by a standard. Additionally, during the RTT positioning operation, the UE may receive a second message in one or more SL messages from the second UE. A message received from the second UE (i.e., a message sent by the second UE) may be sent using a third Tx power based on a first path loss value associated with the first message. The UE may identify the first TX power based on the second message. For illustration, the second message may indicate a first path loss value, a third Tx power, or a combination thereof.

[0134] In some embodiments, one or more SL messages are associated with a bilateral RTT positioning operation. Process 600 may also include performing a bilateral RTT positioning operation with a second UE. During the bilateral RTT positioning operation, the UE may send a first message in one or more SL messages. The first message may be sent to the second UE using a second Tx power. In some embodiments, the second Tx power is a default Tx power, such as a Tx power defined by a standard. Additionally, during the bilateral RTT, the UE may receive a second message in one or more SL messages from the second UE. The second message received from the second UE (i.e., sent by the second UE) may be sent using or based on the second Tx power. The UE may determine a first path loss value based on the second Tx power, the second message, or a combination thereof. In some embodiments, in order to identify the first TX power, the UE may determine the first Tx power based on the first path loss value.

[0135] Figure 7 700 is a flow chart illustrating an example process 700 for supporting power control for positioning according to one or more aspects. The operations of process 700 may be performed by a UE (such as the one described above with reference to Figures 1 to 4 UE 115, UE 415, UE 417, reference Figure 8 For example, the example operations (also referred to as "blocks") of process 700 may enable UE 115 to support power control for positioning.

[0136] In box 702, the UE sends a first SRS configuration associated with SL communication between multiple UEs including the UE and the one or more UEs to one or more UEs. The first SRS configuration may include or correspond to transmit power information 407. The one or more UEs may include or correspond to UE 415, UE 417, another UE, or a combination thereof. The first SRS configuration may indicate a first Tx power for SL communication and a first number of symbols for each SL positioning instance associated with the SL positioning session. In some embodiments, the first SRS configuration is unicast, multicast, or broadcast.

[0137] In block 704, the UE sends a first SL SRS position signal to the one or more UEs or receives a first SL SRS position signal from the one or more UEs based on the first SRS configuration. For example, the UE may send a first SL SRS position signal to the one or more UEs. As another example, the UE may receive a first SL SRS position signal from the one or more UEs. The first SLSRS position signal may include or correspond to the SL SRS position signal 470. In some implementations, the first SL SRS position signal is unicast, multicast, or broadcast.

[0138] In some embodiments, during a connection establishment or discovery phase associated with SL communication between the UE and the one or more UEs, the UE may determine one or more candidate Tx power configurations for SL communication and one or more candidate symbol numbers for each SL positioning instance. The one or more candidate Tx power configurations or the one or more candidate symbol numbers for each SL positioning instance may include or correspond to transmit power information 407. The one or more candidate Tx power configurations and the one or more candidate symbol numbers for each SL positioning instance are acceptable to the UE and the one or more UEs. For example, the UE and the one or more UEs may negotiate one or more candidate Tx power configurations and one or more candidate symbol numbers for each SL positioning instance during a connection establishment or discovery phase.

[0139] In some embodiments, during the connection establishment phase or the discovery phase, the UE may select the first SRS configuration based on one or more candidate Tx power configurations and one or more candidate symbol quantities for each SL positioning instance. Additionally, in order to send the first SRS configuration, the UE may also send (such as unicast or multicast) an RRC indicating the first SRS configuration.

[0140] In some specific implementations, the UE may send a second SRS configuration associated with SL communication to the one or more UEs or receive a second SRS configuration associated with SL communication from the one or more UEs. For example, the UE may send a second SRS configuration to the one or more UEs. As another example, the UE may receive a second SRS configuration from the one or more UEs. The second SRS configuration may include or correspond to transmit power information 407. The second SRS configuration may indicate a second Tx power different from the first Tx power or a second number of symbols for each SL positioning instance associated with the SL positioning session. For example, the second SRS configuration may indicate a second Tx power different from the first Tx power and a second number of symbols for each SL positioning instance associated with the SL positioning session. The second number of symbols may be different from the first number of symbols. Additionally, the UE may send a second SL SRS position signal to the one or more UEs based on the second SRS configuration or receive a second SL SRS position signal from the one or more UEs. For example, the UE may send a second SL SRS position signal to the one or more UEs. As another example, the UE may receive a second SL SRS position signal from the one or more UEs. In some specific implementations, the second SL SRS position signal is unicast or multicast.

[0141] In some specific implementations, in order to send the second SRS configuration to the one or more UEs or receive the second SRS configuration from the one or more UEs, the UE may send or receive a MAC-CE indicating the second SRS configuration. For example, the UE may send a MAC-CE including or indicating the second SRS configuration. As another example, the UE may receive a MAC-CE including or indicating the second SRS configuration. Additionally, the MAC-CE may be unicast or multicast.

[0142] Figure 8 800 is a block diagram of an example UE 800 that supports power control for positioning according to one or more aspects. The UE 800 may be configured to perform operations, including referring to Figures 5 to 7 In some implementations, the UE 800 includes a block of one or more processes described herein. Figures 1 to 4 1 and 115. For example, the UE 800 includes a controller 280 that is used to execute logic or computer instructions stored in a memory 282 and control components of the UE 800 that provide the features and functionality of the UE 800. The UE 800 transmits and receives signals via radios 801a-r and antennas 252a-r under the control of the controller 280. The radios 801a-r include various components and hardware, such as those shown in FIG. Figure 2, illustrated for UE 115, includes modulators and demodulators 254a-r, a MIMO detector 256, a receive processor 258, a transmit processor 264, and a TX MIMO processor 266.

[0143] As shown, the memory 282 may include SL communication logic 802, Uu communication logic 803, or a combination thereof. The SL communication logic 802 may be configured to enable the UE 800 to perform one or more SL communication operations with another UE. For example, the SL communication logic 802 may be configured to determine or identify a path loss scheme, identify or determine Tx power based on one or more SL messages, or determine or identify an SRS configuration associated with SL communication. For example, the SL communication logic 802 may be configured to determine or identify at least one of the following as described herein: Figure 4 or Figure 5 As another example, the SL communication logic 802 may be configured based on at least Figure 4 or Figure 6 As another example, the SL communication logic 802 may be configured to determine or identify the Tx power as at least referenced herein. Figure 4 The Uu communication logic 803 may be configured to enable the UE 800 to perform one or more Uu communication operations with a network entity (such as a base station, a TRP, a core network, or a LMF). The UE 800 may receive data from one or more network entities (such as Figures 1 to 4 Base station 105, Figure 4 Base station 455, Figure 1 or Figure 4 Core network 130, Figure 1 or Figure 4 LMF 131, TRP or Fig.10 The memory 282 may include:

[0144] Fig. 9 900 is a flow chart illustrating an example process 900 for supporting power control for positioning according to one or more aspects. The operations of process 900 may be performed by a base station (such as described above with reference to Figure 1 , Figure 2 or Figure 4 The base station 105, base station 455, decomposed base station 300, RU 340, TRP or reference Fig.10For example, the example operations of process 900 may enable base station 105 to support power control for positioning. Although process 900 is described with reference to operations performed by a base station, in other specific implementations, process 900 or a portion thereof may be performed by another network entity such as core network 130 or LMF 131.

[0145] In block 902, the base station receives first path loss information based on SL communications associated with the multiple UEs from a first UE among multiple UEs associated with the SL positioning session. For example, the path loss information may include or correspond to measurement information 406, transmit power information 407, or path loss information 474. The multiple UEs may include or correspond to UE 115, UE 415, UE 417, another UE, or a combination thereof. In some embodiments, the SL communication includes a SL positioning session.

[0146] In block 904, the base station sends first transmit power information indicating a first Tx power for Uu communication and SL communication performed by the first UE to the first UE. The first Tx power may be based on the first path loss information. The first transmit power information may include or correspond to the transmit power information 464, the Tx power information 472, or the transmit power information 407. In some implementations, the first Tx power information is sent to each of the plurality of UEs.

[0147] In some specific implementations, the first path loss information indicates, for each other UE among the multiple UEs except the first UE, a SL path loss value associated with the SL communication between the first UE and the other UEs. Additionally or alternatively, the first path loss information may be associated with the SL positioning session and may indicate a first RSRP of the SL SRS location signal received by the first UE, a first SL SRS location measurement of the UE and associated with the SL SRS location signal, or a combination thereof. The SL SRS location signal associated with the first path loss information may have been sent based on a default transmit power (such as a default transmit power defined by a standard). In some specific implementations, the base station may receive second path loss information based on the SL communication associated with the multiple UEs from a second UE among the multiple UEs. The second path loss information may be associated with the SL positioning session and indicate a second RSRP of the SL SRS location signal received by the second UE, a second SL SRS location measurement of the second UE and associated with the SL SRS location signal, or a combination thereof. The base station may determine the first Tx power based on the first path loss information, the second path loss information, or a combination thereof.

[0148] In some specific implementations, the base station estimates a UE-UE path loss value, a UE-TRP path loss value, or a combination thereof based on the first path loss information. The base station may determine the first Tx power based on the UE-UE path loss value, the UE-TRP path loss value, or a combination thereof.

[0149] In some implementations, the base station receives a communication from the first UE. The base station may determine a Uu path loss value based on the communication. Additionally, the base station may determine a first Tx power based on the first path loss information and the Uu path loss value.

[0150] In some specific implementations, the first transmit power information may indicate a first Tx power of at least one SL positioning instance for the SL positioning session associated with the multiple UEs. Additionally or alternatively, the first transmit power information may indicate a first Tx power of multiple SL positioning instances for the SL positioning session associated with the multiple UEs. In some specific implementations, the base station may receive path loss information associated with at least one SL positioning instance among the multiple SL positioning instances for the SL positioning session associated with the multiple UEs.

[0151] In some specific implementations, the base station receives second SL path loss information associated with the first UE and the second UE and based on the first Tx power from the first UE. The base station may send second transmit power information indicating a second Tx power for Uu communication and SL communication to the first UE. The second Tx power may be based on the second path loss information.

[0152] In some specific implementations, the second transmit power information may indicate a change in Tx power from the first Tx power to the second Tx power. For example, the second transmit power information may indicate the second Tx power, an increase or decrease in TX power, an amount of Tx power change, or a combination thereof. In some specific implementations, the base station sends an RRC, MAC-CE, or DCI including the second transmit power information to the first UE.

[0153] Fig.10 1 is a block diagram of an example base station 1000 supporting power control for positioning according to one or more aspects. The base station 1000 may be configured to perform operations including reference Fig. 9 In some implementations, the base station 1000 includes a block of the process 900 described above. Figure 1 , Figure 2 or Figure 4The structure, hardware, and components shown and described for the base station 105 or decomposed base station 300 of FIG. 1000 may include, for example, a controller 240 that operates to execute logic or computer instructions stored in a memory 242 and controls components of the base station 1000 that provide the features and functionality of the base station 1000. The base station 1000 transmits and receives signals via the radios 1001a-t and antennas 234a-t under the control of the controller 240. The radios 1001a-t include various components and hardware, such as those described in FIG. Figure 2 , illustrated for base station 105, includes modulators and demodulators 232a-t, a transmit processor 220, a TX MIMO processor 230, a MIMO detector 236, and a receive processor 238.

[0154] As shown, the memory 242 may include communication logic 1002 and Tx power logic 1003. The communication logic 1002 may be configured to perform one or more communication operations, such as one or more Uu communication operations. Additionally or alternatively, the communication logic 1002 may be configured to monitor one or more SL communications. The Tx power logic 1003 may be configured to determine the Tx power for one or more UEs. The Tx power may be used by one or more UEs for Uu communication, SL communication (e.g., SL positioning), or a combination thereof. The base station 1000 may receive a Tx power from one or more UEs (such as Figures 1 to 4 UE 115, UE 415, UE 417 or Figure 8 UE 800) receives a signal or sends a signal to the one or more UEs.

[0155] Note, reference Figures 5 to 7 or Fig. 9 One or more blocks (or operations) described herein may be combined with one or more blocks (or operations) described in another figure with reference to the accompanying drawings. Figure 5 One or more boxes (or operations) of Figure 6 As another example, with Figure 5 One or more boxes associated with Fig. 9 As another example, Figure 5 One or more boxes associated with Figure 7 As another example, Figures 5 to 7 or Fig. 9 One or more boxes associated with Figures 1 to 4 One or more associated boxes (or operations) are combined. Additionally or alternatively, the above reference Figures 1 to 4 One or more of the operations described may be combined with Figure 8 or Fig.10A combination of one or more of the operations described.

[0156] In one or more aspects, the technology for supporting power control for positioning may include additional aspects, such as any single aspect or any combination of aspects described below or in combination with one or more other processes or devices described elsewhere herein. In a first aspect, the technology for supporting power control for positioning may include receiving first path loss information based on SL communication associated with the multiple UEs from a first UE of multiple UEs associated with a SL positioning session. The technology may also include sending first transmit power information indicating a first Tx power for Uu communication and SL communication performed by the first UE to the first UE. The first Tx power may be based on the first path loss information. In some examples, the technology in the first aspect may be implemented in a method or process. In some examples, the technology of the first aspect may be implemented in a wireless communication device (such as a base station, which may include a base station or a component of a base station). In some examples, the wireless communication device may include at least one processing unit or system (which may include an application processor, a modem, or other component) and at least one memory device coupled to the processing unit. The processing unit may be configured to perform the operations described herein with respect to the wireless communication device. In some examples, the memory device includes a non-transitory computer-readable medium having program code stored thereon, and the program code, when executed by the processing unit, is configured to cause the wireless communication device to perform the operations described herein. Additionally or alternatively, the wireless communication device may include an interface (eg, a wireless communication interface) including a transmitter, a receiver, or a combination thereof. Additionally or alternatively, the wireless communication device may include one or more components configured to perform the operations described herein.

[0157] In a second aspect, in combination with the first aspect, the SL communication includes a SL positioning session.

[0158] In a third aspect, in combination with one or more of the first aspect or the second aspect, first Tx power information is sent to each UE of the multiple UEs.

[0159] In a fourth aspect, in combination with one or more aspects of the first to third aspects, the first path loss information indicates, for each other UE among the multiple UEs except the first UE, a SL path loss value associated with SL communication between the first UE and the other UE.

[0160] In the fifth aspect, in combination with one or more aspects of the first to fourth aspects, the first path loss information is associated with the SL positioning session and indicates a first RSRP of the SL SRS location signal received by the first UE, a first SL SRS location measurement of the UE and associated with the SL SRS location signal, or a combination thereof.

[0161] In a sixth aspect, in combination with the fifth aspect, the SL SRS location signal is transmitted based on a default transmission power.

[0162] In a seventh aspect, in combination with the fifth aspect, the technology also includes a second UE among the multiple UEs receiving second path loss information based on SL communication associated with the multiple UEs,

[0163] In an eighth aspect, in combination with the seventh aspect, the second path loss information is associated with the SL positioning session and indicates a second RSRP of the SL SRS location signal received by the second UE, a second SL SRS location measurement of the second UE and associated with the SL SRS location signal, or a combination thereof.

[0164] In a ninth aspect, in combination with the eighth aspect, the technology also includes determining the first Tx power based on the first path loss information, the second path loss information, or a combination thereof.

[0165] In the tenth aspect, in combination with one or more aspects of the first to ninth aspects, the technology also includes estimating a UE-UE path loss value, a UE-TRP path loss value, or a combination thereof based on the first path loss information.

[0166] In an eleventh aspect, in combination with the tenth aspect, the technology also includes determining a first Tx power based on a UE-UE path loss value, a UE-TRP path loss value, or a combination thereof.

[0167] In a twelfth aspect, in combination with one or more of the first to eleventh aspects, the technology also includes receiving communications associated with the first UE.

[0168] In a thirteenth aspect, in combination with the twelfth aspect, the technology also includes determining a Uu path loss value based on the communication.

[0169] In a fourteenth aspect, in combination with the thirteenth aspect, the technology also includes determining a first Tx power based on the first path loss information and the Uu path loss value.

[0170] In the fifteenth aspect, in combination with one or more aspects of the first to fourteenth aspects, the first transmit power information indicates a first Tx power for multiple SL positioning instances of the SL positioning sessions associated with the multiple UEs.

[0171] In the sixteenth aspect, in combination with one or more aspects of the first to fifteenth aspects, the technology also includes receiving path loss information associated with at least one SL positioning instance for at least one SL positioning instance among multiple SL positioning instances of the SL positioning sessions associated with the multiple UEs.

[0172] In the seventeenth aspect, in combination with one or more aspects of the first to sixteenth aspects, the technology also includes receiving path loss information associated with the SL positioning instance for each SL positioning instance of multiple SL positioning instances of the SL positioning sessions associated with the multiple UEs.

[0173] In an eighteenth aspect, in combination with one or more aspects of the first to seventeenth aspects, the technology also includes receiving, from the first UE, second SL path loss information associated with the first UE and the second UE and based on the first Tx power.

[0174] In a nineteenth aspect, in combination with the eighteenth aspect, the technology also includes sending second transmit power information indicating a second Tx power for Uu communication and SL communication to the first UE, the second Tx power being based on the second path loss information.

[0175] In the twentieth aspect, in combination with the nineteenth aspect, the second transmission power information indicates a change of Tx power from the first Tx power to the second Tx power.

[0176] In the twenty-first aspect, in combination with the nineteenth aspect, the second transmit power information indicates a second Tx power, an increase or decrease in TX power, a Tx power change amount, or a combination thereof.

[0177] In the twenty-second aspect, in combination with the nineteenth aspect, the technology also includes sending an RRC, MAC-CE or DCI including second transmit power information to the first UE.

[0178] In one or more aspects, the technology for supporting power control for positioning may include additional aspects, such as any single aspect or any combination of aspects described below or in combination with one or more other processes or devices described elsewhere herein. In a twenty-third aspect, the technology for power control for positioning may include receiving a path loss scheme indicator from a network entity, the path loss scheme indicator indicating one of multiple path loss schemes. The technology also includes determining a first Tx power for a SL positioning session performed by a first UE based on the scheme indicated by the path loss scheme indicator. In some examples, the technology in the twenty-third aspect may be implemented in a method or process. In some other examples, the technology in the twenty-third aspect may be implemented in a wireless communication device (such as a UE, which may include a UE or a component of a UE). In some examples, the wireless communication device may include at least one processing unit or system (which may include an application processor, a modem, or other component) and at least one memory device coupled to the processing unit. The processing unit may be configured to perform the operations described herein with respect to the wireless communication device. In some examples, the memory device includes a non-transitory computer-readable medium having a program code stored thereon, and the program code, when executed by the processing unit, is configured to cause the wireless communication device to perform the operations described herein. Additionally or alternatively, the wireless communication device may include an interface (eg, a wireless communication interface) including a transmitter, a receiver, or a combination thereof. Additionally or alternatively, the wireless communication device may include one or more components configured to perform the operations described herein.

[0179] In a twenty-fourth aspect, in combination with the twenty-third aspect, a scheme indicated by the indicator includes a SL path loss scheme, a UL path loss scheme, or a joint SL and UL path loss scheme.

[0180] In the twenty-fifth aspect, in combination with the twenty-third aspect or the twenty-fourth aspect, a scheme indicated by the indicator includes a SL path loss scheme.

[0181] In aspect 26, in combination with one or more aspects of aspects 23 to 25, the technology also includes performing a SL discovery phase with one or more UEs.

[0182] In the twenty-seventh aspect, in combination with the twenty-sixth aspect, the technology also includes during the SL discovery phase, for each of the one or more UEs, receiving a first message from the UE, the first message being sent by the UE using a second Tx power.

[0183] In a twenty-eighth aspect, in combination with the twenty-seventh aspect, the technology also includes determining, for each of the one or more UEs, a received power associated with a first message from the UE during a SL discovery phase.

[0184] In the twenty-ninth aspect, in combination with the twenty-eighth aspect, the technology also includes determining, during the SL discovery phase, for each of the one or more UEs, a path loss value based on a first message from the UE.

[0185] In the thirtieth aspect, in combination with the twenty-ninth aspect, the technology also includes determining a first Tx power based on at least one path loss value of the one or more UEs.

[0186] In the thirty-first aspect, in combination with the twenty-third aspect or the twenty-fourth aspect, a scheme indicated by the indicator includes a UL path loss scheme.

[0187] In aspect thirty-second, in combination with aspect twenty-third or aspect thirty-first, the technology also includes determining a path loss value for each of one or more TRPs based on Uu communication between the first UE and the TRP.

[0188] In aspect thirty-third, in combination with aspect thirty-second, the technology also includes determining a first Tx power based on path loss values ​​of one or more TRPs and independently of SL communication performed by the first UE.

[0189] In a thirty-fourth aspect, in combination with the twenty-third aspect or the twenty-fourth aspect, a scheme indicated by the indicator includes a joint SL and UL path loss scheme.

[0190] In aspect thirty-fifth, in combination with aspect thirty-third, the technology also includes determining first path loss information based on Uu communication between the first UE and a group of one or more TRPs.

[0191] In aspect thirty-six, in combination with aspect thirty-fifth, the technology also includes determining second path loss information based on SL communication between the first UE and a group of one or more UEs.

[0192] In the thirty-seventh aspect, in combination with the thirty-sixth aspect, the technology also includes determining the first Tx power based on the first path loss information and the second path loss information.

[0193] In aspect 38, in combination with aspect 37, a set of one or more TRPs is selected by a first UE from a set of one or more available TRPs, or is selected by a network entity and indicated to the UE.

[0194] In aspect thirty-ninth, in combination with aspect thirty-eight or aspect thirty-eight, a group of one or more UEs are selected by a first UE from a group of one or more available UEs, or are selected by a network entity and indicated to the UE.

[0195] In one or more aspects, the technology for supporting power control for positioning may include additional aspects, such as any single aspect or any combination of aspects described below or in combination with one or more other processes or devices described elsewhere herein. In the 40th aspect, the technology for power control for positioning may include identifying a first Tx power based on one or more SL messages between a first UE and one or more UEs. The first Tx power may be based on a first path loss value between the first UE and a second UE in the one or more UEs. The technology also includes sending a SL SRS location signal based on the first Tx power. In some examples, the technology in the 40th aspect may be implemented in a method or process. In some other examples, the technology in the 40th aspect may be implemented in a wireless communication device (such as a UE, which may include a UE or a component of a UE). In some examples, the wireless communication device may include at least one processing unit or system (which may include an application processor, a modem, or other components) and at least one memory device coupled to the processing unit. The processing unit may be configured to perform the operations described herein with respect to the wireless communication device. In some examples, the memory device includes a non-transitory computer-readable medium having a program code stored thereon, and the program code, when executed by the processing unit, is configured to cause the wireless communication device to perform the operations described herein. Additionally or alternatively, the wireless communication device may include an interface (eg, a wireless communication interface) including a transmitter, a receiver, or a combination thereof. Additionally or alternatively, the wireless communication device may include one or more components configured to perform the operations described herein.

[0196] In the forty-first aspect, in combination with the fortieth aspect, the technology also includes performing a SL discovery phase with the one or more UEs.

[0197] In aspect 42, in combination with aspect 41, the technology also includes, during a SL discovery phase, for each of the one or more UEs, receiving a first message from the UE, the first message being sent by the UE using a second Tx power.

[0198] In a forty-third aspect, in combination with the forty-second aspect, the technology also includes determining a received power associated with a first message from the UE and determining a path loss value based on the first message from the UE.

[0199] In a forty-fourth aspect, in combination with the forty-third aspect, identifying the first TX power comprises determining the first Tx power based on at least one path loss value associated with the one or more UEs.

[0200] In the forty-fifth aspect, in combination with the forty-fourth aspect, the first path loss is determined as a maximum value, a minimum value or an average value based on at least one path loss value associated with the one or more UEs.

[0201] In the forty-sixth aspect, in combination with the fortieth aspect, the technology also includes associating one or more SL messages with the RTT positioning operation.

[0202] In the forty-seventh aspect, in combination with the forty-sixth aspect, the technology also includes performing an RTT positioning operation with a second UE.

[0203] In the forty-eighth aspect, in combination with the forty-seventh aspect, the technology also includes sending a first message of one or more SL messages to a second UE during an RTT positioning operation, wherein the first message is sent based on a second Tx power.

[0204] In aspect 49, in combination with aspect 48, the technology also includes receiving, during an RTT positioning operation, a second message among one or more SL messages from a second UE, the message being sent by the second UE using a third Tx power based on a first path loss value associated with the first message.

[0205] In the fiftieth aspect, in combination with the forty-ninth aspect, the first TX power is identified based on the second message.

[0206] In the fifty-first aspect, in combination with the fiftieth aspect, the second message indicates a first path loss value, a third Tx power, or a combination thereof.

[0207] In the fifty-second aspect, in combination with the fortieth aspect, one or more SL messages are associated with a bilateral RTT positioning operation.

[0208] In the fifty-third aspect, in combination with the fifty-second aspect, the technology also includes performing a bilateral RTT positioning operation with a second UE.

[0209] In the fifty-fourth aspect, in combination with the fifty-third aspect, the technology also includes sending a first message of one or more SL messages to a second UE during a bilateral RTT positioning operation, wherein the first message is sent based on a second Tx power.

[0210] In the fifty-fifth aspect, in combination with the fifty-fourth aspect, the technology also includes receiving a second message among one or more SL messages from a second UE during a bilateral RTT positioning operation, the second message being sent by the second UE using a second Tx power.

[0211] In a fifty-sixth aspect, in combination with the fifty-fifth aspect, the technology also includes determining a first path loss value based on a second Tx power, a second message, or a combination thereof.

[0212] In a fifty-seventh aspect, in combination with the fifty-sixth aspect, identifying the first TX power comprises determining the first Tx power based on a first path loss value.

[0213] In one or more aspects, the technology for supporting power control for positioning may include additional aspects, such as any single aspect or any combination of aspects described below or in combination with one or more other processes or devices described elsewhere herein. In the fifty-eighth aspect, the technology for power control for positioning may include sending a first SRS configuration associated with SL communication between multiple UEs including the UE and the one or more UEs to one or more UEs. The first SRS configuration may indicate a first Tx power for SL communication and a first number of symbols for each SL positioning instance associated with the SL positioning session. The technology also includes sending a first SL SRS location signal to the one or more UEs or receiving the first SL SRS location signal from the one or more UEs based on the first SRS configuration. In some examples, the technology in the fifty-eighth aspect may be implemented in a method or process. In some other examples, the technology in the fifty-eighth aspect may be implemented in a wireless communication device (such as a UE, which may include a UE or a component of a UE). In some examples, the wireless communication device may include at least one processing unit or system (which may include an application processor, a modem, or other component) and at least one memory device coupled to the processing unit. The processing unit may be configured to perform the operations described herein with respect to the wireless communication device. In some examples, the memory device includes a non-transitory computer-readable medium having a program code stored thereon, which, when executed by the processing unit, is configured to cause the wireless communication device to perform the operations described herein. Additionally or alternatively, the wireless communication device may include an interface (e.g., a wireless communication interface) comprising a transmitter, a receiver, or a combination thereof. Additionally or alternatively, the wireless communication device may include one or more components configured to perform the operations described herein.

[0214] In the fifty-ninth aspect, in combination with the fifty-eighth aspect, the technology also includes determining one or more candidate Tx power configurations for SL communication and one or more candidate symbol numbers for each SL positioning instance during a connection establishment or discovery phase associated with SL communication between the UE and the one or more UEs.

[0215] In the sixtieth aspect, in combination with the fifty-ninth aspect, one or more candidate Tx power configurations and one or more candidate symbol numbers for each SL positioning instance are acceptable to the UE and the one or more UEs.

[0216] In the sixty-first aspect, in combination with one or more aspects of the first to sixtieth aspects, the technology also includes selecting a first SRS configuration based on one or more candidate Tx power configurations and one or more candidate symbol numbers for each SL positioning instance during a connection establishment or discovery phase associated with SL communication between the UE and the one or more UEs.

[0217] In the sixty-second aspect, in combination with the sixty-first aspect, in order to send the first SRS configuration, the technology also includes sending an RRC indicating the first SRS configuration.

[0218] In the sixty-third aspect, in combination with the sixty-second aspect, the RRC is unicast or multicast. In some specific implementations, the first SRS configuration can be unicast or multicast.

[0219] In aspect sixty-fourth, in combination with one or more aspects from aspect fifty-eight to aspect sixty-third, the technology also includes sending a second SRS configuration associated with SL communication to the one or more UEs or receiving a second SRS configuration associated with SL communication from the one or more UEs.

[0220] In the sixty-fifth aspect, in combination with the sixty-fourth aspect, the second SRS configuration indicates a second Tx power different from the first Tx power.

[0221] In the sixty-sixth aspect, in combination with the sixty-fourth aspect or the sixty-fifth aspect, the second SRS configuration indicates a second number of symbols for each SL positioning instance associated with the SL positioning session.

[0222] In a sixty-seventh aspect, in combination with the sixty-sixth aspect, the second symbol number is different from the first symbol number.

[0223] In aspect sixty-eight, in combination with one or more aspects from aspect sixty-fifth to aspect sixty-seventh, the technology also includes sending a second SL SRS position signal to the one or more UEs or receiving the second SL SRS position signal from the one or more UEs based on a second SRS configuration.

[0224] In the sixty-ninth aspect, in combination with the sixty-eighth aspect, in order to send a second SRS configuration to the one or more UEs or receive a second SRS configuration from the one or more UEs, the technology also includes sending or receiving a MAC-CE indicating the second SRS configuration.

[0225] In the seventieth aspect, in combination with the sixty-ninth aspect, MAC-CE is unicast or multicast.

[0226] In the seventy-first aspect, in combination with one or more of aspects sixty-four to sixty-eight, the second SRS configuration is unicast or multicast.

[0227] It should be understood by those skilled in the art that any of a variety of different technologies and techniques may be used to represent information and signals. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be mentioned throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or optical particles, or any combination thereof.

[0228] In this article Figures 1 to 10 The components, functional blocks and modules described include processors, electronic devices, hardware devices, electronic components, logical circuits, memories, software codes, firmware codes, etc., or any combination thereof. Software should be broadly interpreted to mean instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and / or functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or other terms. In addition, the features discussed herein may be implemented via dedicated processor circuits, via executable instructions, or a combination thereof.

[0229] The technician will further understand that the various illustrative logic boxes, modules, circuits and algorithm steps described in conjunction with the disclosure of this article can be implemented as electronic hardware, computer software or a combination of the two. In order to clearly illustrate this interchangeability of hardware and software, various illustrative components, boxes, modules, circuits and steps have been generally described above in terms of their functions. Whether such functions are implemented as hardware or software depends on the specific application and the design constraints proposed to the entire system. Those skilled in the art can implement the described functions in different ways for each specific application, but such specific implementation decisions should not be interpreted as causing departure from the scope of the present disclosure. The technician will also easily recognize that the order or combination of components, methods or interactions described herein are only examples, and the components, methods or interactions of various aspects of the present disclosure can be combined or performed in a manner other than the manner illustrated and described herein.

[0230] The various illustrative logical components, logic blocks, modules, circuits, and algorithmic processes described in conjunction with the specific implementations disclosed herein may be implemented as electronic hardware, computer software, or a combination of the two. The interchangeability of hardware and software has been generally described in terms of functionality and illustrated in the various illustrative components, blocks, modules, circuits, and processes described above. Whether such functionality is implemented in hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0231] The hardware and data processing apparatus for implementing the various illustrative logics, logic blocks, modules and circuits described in conjunction with the various aspects disclosed herein may be implemented or executed using a general purpose single-chip or multi-chip processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, or any conventional processor, controller, microcontroller or state machine. In some specific implementations, a processor may be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in combination with a DSP core, or any other such configuration. In some specific implementations, specific processes and methods may be performed by circuits specific to a given function.

[0232] In one or more aspects, the functions described may be implemented in hardware, digital electronic circuitry, computer software, firmware (including the structures disclosed in this specification and their structural equivalents), or in any combination thereof. Specific implementations of the subject matter described in this specification may also be implemented as one or more computer programs, i.e., one or more modules of computer program instructions encoded on a computer storage medium for execution by a data processing apparatus or for controlling the operation of a data processing apparatus.

[0233] If implemented in software, the function may be stored as one or more instructions or codes on a computer-readable medium or sent via a computer-readable medium. The process of the method or algorithm disclosed herein may be implemented in a processor executable software module that may reside on a computer-readable medium. Computer-readable media include both computer storage media and communication media, and the communication media include any media that can be implemented to transfer a computer program from one place to another. The storage medium may be any available medium that a computer can access. As an example and not limitation, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), CD-ROM or other optical disk storage devices, magnetic disk storage devices or other magnetic storage devices, or any other medium that can be used to store the required program code in the form of an instruction or data structure and can be accessed by a computer. In addition, any connection may be appropriately referred to as a computer-readable medium. Disks and optical disks as used herein include compact disks (CDs), laser disks, optical disks, digital versatile disks (DVDs), floppy disks, and blue-ray disks, wherein disks generally reproduce data magnetically, and optical disks reproduce data optically with lasers. The above combination should also be included in the scope of computer-readable media. Additionally, the operations of a method or algorithm may reside as one or any combination or set of codes and instructions on a machine-readable medium and a computer-readable medium, which may be incorporated into a computer program product.

[0234] Various modifications to the specific implementations described in this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to some other specific implementations without departing from the spirit or scope of the disclosure. Therefore, the claims are not intended to be limited to the specific implementations shown herein, but are to be consistent with the broadest scope consistent with the disclosure, the principles and novel features disclosed herein.

[0235] Additionally, one of ordinary skill in the art will readily appreciate that the terms "upper" and "lower" are sometimes used for ease of describing the drawings and indicate relative positions on a correctly oriented page corresponding to the orientation of the drawings, and may not reflect the correct orientation of any device as implemented.

[0236] Certain features described in this specification in the context of separate implementations may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented in multiple implementations, either individually or in any suitable subcombination. Furthermore, while features may be described above as functioning in certain combinations and even initially claimed as such, one or more features from a claimed combination may in some cases be removed from the combination, and a claimed combination may be directed to subcombinations or variations of subcombinations.

[0237] Similarly, although the operations are depicted in a specific order in the figure, this should not be understood as requiring such operations to be performed in the specific order shown or in a sequential order, or to perform all the illustrated operations to achieve the desired result. Further, the accompanying drawings may schematically depict one or more example processes in the form of a flow chart. However, other operations not depicted may be combined in the schematically illustrated example process. For example, one or more additional operations may be performed before, after, simultaneously or between any illustrated operations. In some environments, multitasking and parallel processing are advantageous. In addition, the separation of various system components in the specific implementation described above should not be understood as requiring such separation in all specific implementations, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products. Additionally, some other specific implementations also fall within the scope of the appended claims. In some cases, the actions narrated in the claims can be performed in different orders and still achieve the desired result.

[0238] As used herein, including in the claims, the term "or" used in a list of two or more items means that any of the listed items may be employed alone, or any combination of two or more of the listed items may be employed. For example, if a composition is described as comprising components A, B, or C, the composition may comprise A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B, and C in combination. In addition, as used herein, including in the claims, "or" as used in a list of items beginning with "at least one" indicates a separate list, so that, for example, a list of "at least one of A, B, or C" means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) or any combination of any of these. The term "substantially" is defined as to a large extent, but not necessarily entirely, what is specified (and includes what is specified; for example, substantially 90 degrees includes 90 degrees, and substantially parallel includes parallel), as understood by one of ordinary skill in the art. In any disclosed implementation, the term "substantially" may be replaced with "within [percent] of" a specified content, where the percentage includes 0.1%, 1%, 5%, or 10%.

[0239] The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Therefore, the disclosure is not intended to be limited to the examples and designs described herein, but to be consistent with the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of wireless communication performed by a network entity, the method comprising: receiving, from a first UE of a plurality of user equipments (UEs) associated with a sidelink (SL) positioning session, first path loss information based on SL communications associated with the plurality of UEs; as well as First transmission power information indicating a first transmission (Tx) power used for Uu communication and SL communication performed by the first UE is transmitted to the first UE, the first Tx power being based on the first path loss information.

2. The method according to claim 1, wherein: The SL communication comprises a SL positioning session; and The first Tx power information is sent to each UE of the plurality of UEs.

3. The method according to claim 1, wherein the first path loss information indicates, for each other UE among the multiple UEs except the first UE, a SL path loss value associated with SL communication between the first UE and the other UE.

4. The method according to claim 1, wherein the first path loss information is associated with a SL positioning session and indicates a first reference signal received power (RSRP) of a SL sounding reference signal (SRS) location signal received by the first UE, a first SL SRS location measurement of the UE and associated with the SL SRS location signal, or a combination thereof. The method according to claim 4 , wherein the SL SRS location signal is transmitted based on a default transmission power.

6. The method according to claim 4, further comprising: receiving, from a second UE among the plurality of UEs, second path loss information based on the SL communication associated with the plurality of UEs, the second path loss information being associated with the SL positioning session and indicating a second RSRP of the SL SRS location signal received by the second UE, a second SL SRS location measurement of the second UE and associated with the SL SRS location signal, or a combination thereof; and The first Tx power is determined based on the first path loss information, the second path loss information, or a combination thereof.

7. The method according to claim 1, further comprising: estimating a UE-UE path loss value, a UE-transmission reception point (TRP) path loss value, or a combination thereof based on the first path loss information; as well as The first Tx power is determined based on the UE-UE path loss value, the UE-TRP path loss value, or a combination thereof.

8. The method according to claim 1, further comprising: receiving communications from the first UE; determining a Uu path loss value based on the communicating; as well as The first Tx power is determined based on the first path loss information and the Uu path loss value.

9. The method according to claim 1, wherein: The first transmit power information indicates the first Tx power for multiple SL positioning instances of SL positioning sessions associated with the multiple UEs.

10. The method according to claim 1, further comprising: Receive path loss information associated with at least one SL positioning instance among multiple SL positioning instances of the SL positioning sessions associated with the multiple UEs.

11. The method according to claim 1, further comprising: receiving, from the first UE, second SL path loss information associated with the first UE and the second UE and based on the first Tx power; as well as Second transmission power information indicating a second Tx power used for the Uu communication and the SL communication is sent to the first UE, the second Tx power being based on the second path loss information.

12. The method according to claim 11, wherein: The second transmit power information indicates a change of Tx power from the first Tx power to the second Tx power. 13 . The method of claim 11 , wherein the second transmit power information indicates the second Tx power, an increase or decrease in TX power, a Tx power change amount, or a combination thereof.

14. The method according to claim 11, further comprising: A radio resource control (RRC), a medium access control-control element (MAC-CE), or downlink control information (DCI) including the second transmit power information is transmitted to the first UE.

15. A method of wireless communication performed by a first user equipment (UE), the method comprising: receiving a path loss scheme indicator from a network entity, the path loss scheme indicator indicating one of a plurality of path loss schemes; as well as A first transmit (Tx) power for a sidelink (SL) positioning session conducted by the first UE is determined based on the scheme indicated by the path loss scheme indicator.

16. The method of claim 15, wherein the one scheme indicated by the indicator comprises a SL path loss scheme, and the method further comprises: Performing a SL discovery phase with one or more UEs; as well as During the SL discovery phase, for each of the one or more UEs: receiving a first message from the UE, where the first message is sent by the UE using a second Tx power; determining a received power associated with the first message from the UE; as well as determining a path loss value based on the first message from the UE; as well as The first Tx power is determined based on at least one path loss value of the one or more UEs.

17. The method of claim 15, wherein the one scheme indicated by the indicator comprises an uplink (UL) path loss scheme, and the method further comprises: determining, for each of one or more transmit receive points (TRPs), a path loss value based on Uu communications between the first UE and the TRP; as well as The first Tx power is determined based on the path loss values ​​of the one or more TRPs and independently of the SL communication performed by the first UE.

18. The method of claim 15, wherein the one scheme indicated by the indicator comprises a joint SL and UL path loss scheme, and the method further comprises: determining first path loss information based on Uu communication between the first UE and a set of one or more TRPs; determining second path loss information based on SL communication between the first UE and a group of one or more UEs; as well as The first Tx power is determined based on the first path loss information and the second path loss information.

19. The method of claim 18, wherein: The set of one or more TRPs is selected by the first UE from a set of one or more available TRPs, or is selected by the network entity and indicated to the UE; and The group of one or more UEs is selected by the first UE from a group of one or more available UEs, or is selected by the network entity and indicated to the UE.

20. A method of wireless communication performed by a first user equipment (UE), the method comprising: identifying a first transmit (Tx) power based on one or more sidelink (SL) messages between the first UE and one or more UEs, the first Tx power being based on a first path loss value between the first UE and a second UE among the one or more UEs; as well as A SL sounding reference signal (SRS) location signal is transmitted based on the first Tx power.

21. The method according to claim 20, further comprising: performing a SL discovery phase with the one or more UEs; as well as During the SL discovery phase, for each of the one or more UEs: receiving a first message from the UE, where the first message is sent by the UE using a second Tx power; determining a received power associated with the first message from the UE; as well as determining a path loss value based on the first message from the UE; and Wherein identifying the first TX power comprises determining the first Tx power based on at least one path loss value associated with the one or more UEs.

22. The method of claim 21, wherein the first path loss is determined as a maximum value, a minimum value, or an average value based on the at least one path loss value associated with the one or more UEs.

23. The method of claim 20, wherein the one or more SL messages are associated with a round trip time (RTT) positioning operation, and the method further comprises: performing the RTT positioning operation with the second UE; as well as During the RTT positioning operation: sending a first message of the one or more SL messages, wherein the first message is sent to the second UE based on a second Tx power; and receiving a second message of the one or more SL messages from the second UE, The message is sent by the second UE using a third Tx power based on the first path loss value associated with the first message; and The first TX power is identified based on the second message.

24. The method of claim 23, wherein the second message indicates the first path loss value, the third Tx power, or a combination thereof.

25. The method of claim 20, wherein the one or more SL messages are associated with a bilateral round trip time (RTT) positioning operation, and the method further comprises: performing the bilateral RTT positioning operation with the second UE; as well as During the bilateral RTT positioning operation: sending a first message of the one or more SL messages, wherein the first message is sent to the second UE based on a second Tx power; and receiving a second message of the one or more SL messages from the second UE, The second message is sent by the second UE using the second Tx power.

26. The method according to claim 25, further comprising: determining the first path loss value based on the second Tx power, the second message, or a combination thereof; and Wherein identifying the first TX power comprises determining the first Tx power based on the first path loss value.

27. A method of wireless communication performed by a user equipment (UE), the method comprising: sending, to one or more UEs, a first sounding reference signal (SRS) configuration associated with sidelink (SL) communication between multiple UEs including the UE and the one or more UEs, the first SRS configuration indicating a first Tx power for SL communication and a first number of symbols for each SL positioning instance associated with the SL positioning session; and A first SL SRS position signal is sent to the one or more UEs or the first SL SRS position signal is received from the one or more UEs based on the first SRS configuration.

28. The method of claim 27, further comprising, during a connection establishment or discovery phase associated with the SL communication between the UE and the one or more UEs: determining one or more candidate Tx power configurations for SL communication and one or more candidate symbol quantities for each SL positioning instance, the one or more candidate Tx power configurations and the one or more candidate symbol quantities for each SL positioning instance being acceptable to the UE and the one or more UEs; and selecting the first SRS configuration based on the one or more candidate Tx power configurations and the one or more candidate symbol quantities per SL positioning instance; and Wherein sending the first SRS configuration comprises sending a radio resource control (RRC) indicating the first SRS configuration, and wherein the RRC is unicast or multicast.

29. The method according to claim 27, further comprising: and sending a second SRS configuration associated with the SL communication to the one or more UEs or receiving the second SRS configuration associated with the SL communication from the one or more UEs, wherein the second SRS configuration indicates: a second Tx power different from the first Tx power, and a second number of symbols for each SL positioning instance associated with the SL positioning session, the second number of symbols being different from the first number of symbols; and A second SL SRS position signal is sent to the one or more UEs or the second SL SRS position signal is received from the one or more UEs based on the second SRS configuration.

30. The method of claim 29, wherein: sending the second SRS configuration to the one or more UEs or receiving the second SRS configuration from the one or more UEs, the second SRS configuration comprising sending or receiving a medium access control-control element (MAC-CE) indicating the second SRS configuration; and The MAC-CE is unicast or multicast.

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