Sample number consideration for measurement periods for SL positioning

Abstract

An apparatus, a method, and a computer program product for sidelink positioning are provided. An example method may include receiving a set of sidelink control information (SCI), where the set of SCIs reserves a set of resources for transmission of a set of sidelink positioning reference signals (SL-PRSs) in at least one same slot, where the set of resources is periodic. The example method may also include measuring the set of SL-PRSs during the measurement period based on the set of SCIs satisfying at least one of the set of conditions.

Description

Cross Reference to Related Applications

[0001] This application claims the benefit of Greek Patent Application Serial No. 20230100625, entitled “NUMBER OF SAMPLES CONSIDERATIONS FOR THE MEASUREMENT PERIOD FOR SL POSITIONING,” filed July 27, 2023, which is expressly incorporated by reference herein in its entirety. TECHNICAL FIELD

[0002] The present disclosure relates generally to communication systems, and more particularly to wireless communication systems with sidelink positioning. BACKGROUND

[0003] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems can employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0004] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. One example of a telecommunication standard is 5G New Radio (NR). 5G NR is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT)), and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Some aspects of 5G NR can be based on the 4G Long Term Evolution (LTE) standard. There exists a need for improvements in 5G NR technology. These improvements can also be applicable to other multi-access technologies and the telecommunication standards that employ these technologies. SUMMARY

[0005] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects. It is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

[0006] In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus at a user equipment (UE) are provided. The apparatus can include at least one memory and at least one processor coupled to the at least one memory. Based at least in part on information stored in the at least one memory, the at least one processor, alone or in any combination of combination, is configured to receive a set of sidelink control information (SCI), where the set of SCI reserves a set of resources for transmission of a set of sidelink positioning reference signals (SL-PRSs) in at least one same slot, where the set of resources is periodic. Based at least in part on information stored in the at least one memory, the at least one processor, alone or in any combination of combination, is configured to measure the set of SL-PRSs over a measurement period based on the set of SCI satisfying at least one condition of a set of conditions.

[0007] In another aspect of the disclosure, a method, a computer-readable medium, and an apparatus at a UE are provided. The apparatus can include at least one memory and at least one processor coupled to the at least one memory. Based at least in part on information stored in the at least one memory, the at least one processor, alone or in any combination of combination, is configured to receive a SCI, where the SCI reserves one or more SL-PRS resources for transmission of at least one sidelink positioning reference signal (SL-PRS). Based at least in part on information stored in the at least one memory, the at least one processor, alone or in any combination of combination, is configured to measure the at least one SL-PRS in a measurement period.

[0008] To the accomplishment of the foregoing and related aspects, one or more aspects comprise the features as fully described and particularly pointed out in the claims. The following description and the appended drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects can be employed. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is a diagram illustrating an example of a wireless communications system and an access network.

[0010] Figure 2 Example aspects of a sidelink (SL) slot structure are illustrated.

[0011] Figure 3is a diagram illustrating an example of a first device and a second device in an access network, in accordance with various aspects of the present disclosure.

[0012] Figure 4 is a diagram illustrating an example of UE positioning based on reference signal measurements.

[0013] Figure 5 Examples of resource reservation for sidelink communications are illustrated.

[0014] Figure 6 is a diagram illustrating an example sidelink slot structure, in accordance with various aspects of the present disclosure.

[0015] Figure 7 is a diagram illustrating an example SL-PRS configuration and resource pool (RP) configuration for positioning (RP-P).

[0016] Figure 8 is a diagram illustrating an example measurement period.

[0017] Figure 9 is a diagram illustrating an example periodic reservation.

[0018] Figure 10 is a diagram illustrating an example SCI reserving resources for multiple transmissions.

[0019] Figure 11 is a diagram illustrating an example communication between two UEs.

[0020] Figure 12 is a diagram illustrating an example SL-PRS with associated periodic reservations.

[0021] Figure 13 is a flow diagram of a method of wireless communication.

[0022] Figure 14 is a flow diagram of a method of wireless communication.

[0023] Figure 15 is a flow diagram of a method of wireless communication.

[0024] Figure 16 is a flow diagram of a method of wireless communication.

[0025] Figure 17 is a diagram illustrating an example of a hardware implementation for an example apparatus and / or network entity. DETAILED DESCRIPTION

[0026] The detailed description set forth below, in connection with the appended drawings, is a description of various configurations and does not represent the only configurations in which the concepts described herein can be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts can be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid obscuring the concepts.

[0027] Several aspects of telecommunication systems are presented with reference to various apparatus and methods. These apparatus and methods are described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as “elements”). These elements can be implemented with electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the particular application and design constraints imposed on the overall system.

[0028] For SL-PRS transmissions, SL-PRS transmissions with periodic reservation and SL-PRS transmissions without periodic reservation can be supported. SL-PRS transmissions with periodic reservation can be SL-PRS transmissions that are reserved based on SL periodic resource reservation. SL-PRS transmissions without periodic reservation can be SL-PRS transmissions in which SL-PRS is transmitted at least once without periodic reservation. Aspects provided herein provide mechanisms for defining measurement periods for both SL-PRS transmissions with periodic reservation and SL-PRS transmissions without periodic reservation to facilitate sidelink positioning.

[0029] As an example, an element, or any portion of an element, or any combination of elements can be implemented as a “processing system” that includes one or more processors. When implementing multiple processors, the processors can execute functions individually or in combination. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on a chip (SoC), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure. One or more processors in the processing system can execute software. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, or any combination of them deemed useful by one of ordinary skill in the art, regardless of the particular nomenclature used.

[0030] Accordingly, in one or more example aspects, implementations, and / or use cases, the described features can be implemented in hardware, software, or any combination thereof. If implemented in software, the functions can be stored on or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise a random-access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.

[0031] While aspects, implementations, and / or use cases are described in this application by illustration to some examples, those examples are not intended to limit the scope of aspects, implementations, and / or use cases. Numerous additional aspects, implementations, and / or use cases can be derived from examples that are disclosed in this application, with equivalence to each disclosed and teaching feature. Further, to the extent that any patentable aspect, implementation and / or use case is described with the filing of this application, or otherwise enabled to be described in this patenting process, the aspects, implementations and / or use cases can also be described outside of this application (for example, in property transfers or other business transactions, or in marketing, sales or advertising materials). Many features that are described can be used in a variety of combinations other than the examples described in this disclosure. Some combinations can be inherently synergistic, others can not be. Accordingly, features described in one example can be used in other examples, regardless of whether the other examples are described to include those features. Further, it is within the scope of the disclosure that some features are used in some examples, but not in others. Accordingly, the descriptions of some examples are not intended to limit the scope of the aspects, implementations, and / or use cases.

[0032] Deployment of communication systems, such as 5G NR systems, can be arranged in a variety of ways with various components or constituent parts. In a 5G NR system or network, a network node, network entity, mobility element of a network, radio access network (RAN) node, core network node, network element, or network equipment, such as a base station (BS) or one or more elements (or one or more components) performing base station functionality (such as a Node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a transmission reception point (TRP), or a cell, among others) can be implemented in an aggregated or disaggregated architecture. For example, a BS, such as a node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a transmission reception point (TRP), or a cell, among others, can be implemented as an aggregated base station (also referred to as a standalone BS or a monolithic BS) or a disaggregated base station.

[0033] An aggregated base station can be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node. A disaggregated base station can be configured to utilize a protocol stack that is physically or logically distributed across two or more elements, such as one or more central or centralized units (CUs), one or more distributed units (DUs), or one or more radio units (RUs). In some aspects, a CU can be implemented within a RAN node, and one or more DUs can be co-located with the CU or, alternatively, can be geographically or virtually distributed in one or more other RAN nodes. A DU can be implemented to communicate with one or more RUs. Each of the CU, DU, and RU can be implemented as a virtual element, a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU).

[0034] Base station operations or network designs can take into account the aggregated nature of base station functionality. For example, a disaggregated base station can be utilized in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (such as a network configuration initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also referred to as a cloud radio access network (C-RAN)). Disaggregation can include distributing functionality across two or more elements at various physical locations, as well as virtually distributing functionality of at least one element, which can enable flexibility in network design. The various elements of a disaggregated base station or disaggregated RAN architecture can be configured for wired or wireless communication with at least one other element.

[0035] Figure 1is a diagram 100 illustrating examples of a wireless communication system and access network. The illustrated wireless communication system includes a disaggregated base station architecture. The disaggregated base station architecture can include one or more CUs 110 that can communicate directly with a core network 120 via a backhaul link, or indirectly with the core network 120 through one or more disaggregated base station units, such as a near real-time (near-RT) RAN intelligent controller (RIC) 125 via an E2 link, or a non-RT RIC 115 associated with a service management and orchestration (SMO) framework 105, or both. The CUs 110 can communicate with one or more DUs 130 via respective midhaul links, such as an Fl interface. The DUs 130 can communicate with one or more RUs 140 via respective front-haul links. The RUs 140 can communicate with respective UEs 104 via one or more radio frequency (RF) access links. In some implementations, a UE 104 can be simultaneously served by multiple RUs 140.

[0036] Each of the units (i.e., the CUs 110, the DUs 130, the RUs 140, and the near-RT RIC 125, the non-RT RIC 115, and the SMO framework 105) can include or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the units or an associated processor or controller providing instructions to the communication interfaces of the units can be configured to communicate with one or more of the other units via the transmission medium. For example, the units can include wired interfaces configured to receive or transmit signals to one or more of the other units over a wired transmission medium. Additionally, the units can include wireless interfaces that can include receivers, transmitters, or transceivers (such as RF transceivers) configured to receive and / or transmit signals to one or more of the other units over a wireless transmission medium.

[0037] In some aspects, the CU 110 can host one or more higher layer control functions. Such control functions can include radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), and / or the like. Each control function can be implemented with an interface configured to communicate signals with other control functions hosted by the CU 110. The CU 110 can 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 implementations, the CU 110 can 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 units can communicate bi-directionally with the CU-CP units via an interface, such as an El interface. The CU 110 can be implemented to communicate with the DUs 130 as needed for network control and signal transfer.

[0038] The DU 130 can correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 140. In some aspects, the DU 130 can 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, and / or the like) in accordance with, at least in part, a functional split, such as those defined by 3GPP. In some aspects, the DU 130 can also host one or more low PHY layers. Each layer (or module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU 130 or with control functions hosted by the CU 110.

[0039] The lower layer functionality can be implemented by one or more RUs 140. In some deployments, the RUs 140 controlled by the DU 130 can correspond to logical nodes that host 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, and / or the like) or both based, at least in part, on a functional split, such as a lower layer functional split. In such an architecture, the RUs 140 can be implemented to handle over-the-air (OTA) communications with one or more UEs 104. In some implementations, real-time and non-real-time aspects of control plane and user plane communications with the RUs 140 can be controlled by the corresponding DUs 130. In some scenarios, this configuration can enable the DUs 130 and the CUs 110 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.

[0040] The SMO framework 105 can be configured to support RAN deployments and provisioning of non-virtualized network elements and virtualized network elements. For non- virtualized network elements, the SMO framework 105 can be configured to support deployment of dedicated physical resources for RAN coverage requirements, which can be managed via an operations and maintenance interface, such as an Ol interface. For virtualized network elements, the SMO framework 105 can be configured to interact with a cloud computing platform, such as Open Cloud (O-Cloud) 190, to perform network element lifecycle management, such as to instantiate a virtualized network element, via a cloud computing platform interface, such as an 02 interface. Such virtualized network elements can include, but are not limited to, CUs 110, DUs 130, RUs 140, and near-RT RICs 125. In some implementations, the SMO framework 105 can communicate with hardware aspects of a 4G RAN, such as Open eNB (O-eNB) 111, via an Ol interface. Additionally, in some implementations, the SMO framework 105 can communicate directly with one or more RUs 140 via an Ol interface. The SMO framework 105 can also include a non-RT RIC 115 configured to support functionality of the SMO framework 105.

[0041] The non-RT RIC 115 can be configured to include logical functions that enable near real-time control and optimization of RAN elements and resources, artificial intelligence (AI) / machine learning (ML) (AI / ML) workflows including model training and updates, or policy-based direction of applications / features in the near-RT RIC 125. The non-RT RIC 115 can be coupled to or in communication with the near-RT RIC 125, such as via an Al interface. The near-RT RIC 125 can be configured to include logical functions that enable near real-time control and optimization of RAN elements and resources via data collection and actions through an interface, such as via an E2 interface, that connects one or more CUs 110, one or more DUs 130, or both, and an O-eNB with the near-RT RIC 125.

[0042] In some implementations, to generate AI / ML models to be deployed in the near-RT RIC 125, the non-RT RIC 115 can receive parameters or external enriched information from an external server. Such information can be utilized by the near-RT RIC 125 and can be received at the SMO framework 105 or the non-RT RIC 115 from non-network data sources or from network functions. In some examples, the non-RT RIC 115 or the near-RT RIC 125 can be configured to regulate RAN behavior or performance. For example, the non-RT RIC 115 can monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 105, such as via reconfiguration of O1, or via creation of RAN management policies, such as Al policies.

[0043] At least one of the CU 110, the DU 130, and the RU 140 can be referred to as a base station 102. Thus, the base station 102 can include one or more of the CU 110, the DU 130, and the RU 140, each component indicated in dashed line to represent that each component can or can not be included in the base station 102. The base station 102 provides a point of access to a core network 120 for a UE 104. The base station 102 can comprise a macro cell (high power cellular base station) and / or a small cell (low power cellular base station). The small cell includes a femto cell, a pico cell, and a micro cell. A network that includes both small cells and macro cells can be referred to as a heterogeneous network. A heterogeneous network can also include home evolved Node Bs (eNBs) (HeNBs), which can provide service to a restricted group known as a closed subscriber group (CSG). The communication links between the RUs 140 and the UEs 104 can include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a RU 140 and / or downlink (DL) (also referred to as forward link) transmissions from a RU 140 to a UE 104. The communication links can use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication links can be through one or more carriers, and each carrier can be a band of frequency waves having a Yx MHz ( x The base station 102 / UE 104 can use up to YMHz (e.g., 5 MHz, 10 MHz, 15 MHz, 20 MHz, 100 MHz, 400 MHz, etc.) bandwidth. The carriers can or can not be adjacent to each other. The allocation of carriers can be asymmetric with respect to DL and UL (e.g., more or less carriers can be allocated for DL than for UL). A component carrier can include a primary component carrier and one or more secondary component carriers. A primary component carrier can be referred to as a primary cell (PCell) and a secondary component carrier can be referred to as a secondary cell (SCell).

[0044] Certain UEs 104 can communicate with each other using device-to-device (D2D) communication link 158. The D2D communication link 158 can use the DL / UL WWAN spectrum. The D2D communication link 158 can use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). D2D communication can be through a variety of wireless D2D communications systems, such as for example, Bluetooth ™ (Bluetooth is a trademark of Bluetooth Special Interest Group (SIG)), Wi-Fi ™ (Wi-Fi is a trademark of Wi-Fi Alliance), LTE, or NR.

[0045] Some examples of sidelink communication can include Vehicle-to-Vehicle (V2V), Vehicle-to-Infrastructure (V2I) (e.g., from a vehicle-based communication device to a road infrastructure node such as a Road Side Unit (RSU)), Vehicle-to-Network (V2N) (e.g., from a vehicle-based communication device to one or more network nodes such as base stations), Vehicle-to-Pedestrian (V2P), Cellular Vehicle-to-Everything (C-V2X), and / or combinations thereof, and / or vehicle-based communication devices communicating with other devices, which can be collectively referred to as Vehicle-to-Everything (V2X) communications (e.g., including Cellular V2X (CV2X)). Sidelink communication can be based on V2X or other D2D communication, such as Proximity Service (ProSe), among other examples. In addition to UEs, sidelink communication can also be transmitted and received by other transmitting devices and receiving devices such as Road Side Unit (RSU) 107, among other examples. In some aspects, sidelink communication can be exchanged using a PC5 interface, such as described in connection with examples in Figure 2 Although the following description of example slot structures of Figure 2 includes examples in connection with 5G NR, the concepts described herein can be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0046] The wireless communications system can also include a Wi-Fi AP 150 in communication with UEs 104 (also referred to as Wi-Fi stations (STAs)) via communication links 154, e.g., in 5 GHz unlicensed spectrum, or the like. When communicating in unlicensed spectrum, the UEs 104 / AP 150 can perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.

[0047] The electromagnetic spectrum is often subdivided based on frequency / wavelength into various classes, bands, channels, and so forth. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz - 7. 125 GHz) and FR2 (24.25 GHz - 52.6 GHz). Despite a portion of FR1 being greater than 6 GHz, FR1 is often referred to (interchangeably) as a “Sub-6 GHz” band in various documents and articles. With regard to FR2, a similar nomenclature issue sometimes occurs, as it is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz - 300 GHz) which is designated as a “millimeter wave” band by the International Telecommunications Union (ITU).

[0048] The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified operating bands for these mid-band frequencies as frequency range designation FR3 (7. 125 GHz - 24.25 GHz). Bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and thus can effectively extend features of FR1 and / or FR2 to mid-band frequencies. Moreover, higher frequency bands are currently being explored to extend 5G NR operations beyond 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR2-2 (52.6 GHz - 71 GHz), FR4 (71 GHz - 114.25 GHz), and FR5 (114.25 GHz - 300 GHz). Each of these higher bands fall within the EHF band.

[0049] With the above in mind, unless specifically stated otherwise, if the term “Sub-6 GHz” or the like is used herein, this can broadly represent frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. Further, unless specifically stated otherwise, if the term “millimeter wave” or the like is used herein, this can broadly represent frequencies that can include mid-band frequencies, can be within FR2, FR4, FR2-2, and / or FR5, or can be within the EHF band.

[0050] The base stations 102 and the UEs 104 can each include multiple antennas (such as antenna elements, antenna panels, and / or antenna arrays) to facilitate beamforming. The base stations 102 can transmit to UEs 104 in one or more transmit directions using beamforming. The UEs 104 can receive from the base stations 102 in one or more receive directions using beamforming. The UEs 104 can also transmit to the base stations 102 in one or more transmit directions using beamforming. The base stations 102 can receive from the UEs 104 in one or more receive directions using beamforming. The base station 102 / UE 104 can perform beam training to determine the best receive and transmit directions for each of the base station 102 / UE 104. The transmit and receive directions for the base station 102 can or can not be the same. The transmit and receive directions for the UE 104 can or can not be the same.

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

[0052] The core network 120 can include an access and mobility management function (AMF) 161, a session management function (SMF) 162, a user plane function (UPF) 163, a unified data management (UDM) 164, one or more location servers 168, and other functional entities. The AMF 161 is a control node that handles signaling between the UEs 104 and the core network 120. The AMF 161 supports registration management, connection management, mobility management, and other functions. The SMF 162 supports session management and other functions. The UPF 163 supports packet routing, packet forwarding, and other functions. The UDM 164 supports generation of authentication and key agreement (AKA) credentials, user identification handling, access authorization, and subscription management. The one or more location servers 168 are illustrated as including a gateway mobile location center (GMLC) 165 and a location management function (LMF) 166. However, in general, the one or more location servers 168 can include one or more location / determination servers, which can include one or more of a GMLC 165, an LMF 166, a positioning determination entity (PDE), a serving mobile location center (SMLC), a mobile positioning center (MPC), and the like. The GMLC 165 and the LMF 166 support UE location services. The GMLC 165 provides an interface for clients / applications (e.g., emergency services) to access UE positioning information. The LMF 166 receives measurements and assistance information from the NG-RAN and the UE 104 via the AMF 161 to compute a position of the UE 104. The NG-RAN can utilize one or more positioning methods to determine a position of the UE 104. Positioning the UE 104 can involve signal measurements, position estimation, and optional rate calculations based on these measurements. The signal measurements can be made by the UE 104 and / or the base stations 102 serving the UE 104. The measured signals can be based on one or more of a satellite positioning system (SPS) 170 (e.g., Global Navigation Satellite System (GNSS), Global Positioning System (GPS), Non-Terrestrial Network (NTN), or other satellite positioning / location system), LTE signals, Wireless Local Area Network (WLAN) signals, Bluetooth signals, Terrestrial Beacon System (TBS), sensor-based information (e.g., barometric pressure sensors, motion sensors), NR Enhanced Cell ID (NR E-CID) methods, NR signals (e.g., multi-round trip time (multi-RTT), DL angle of departure (DL-AoD), DL time difference of arrival (DL-TDOA), UL time difference of arrival (UL-TDOA), and UL angle of arrival (UL-AoA) positioning), and / or other systems / signals / sensors.

[0053] Examples of a UE 104 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, or any other similar functional device. Some of the UEs 104 can be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicle, heart monitor, etc.). The UE 104 can also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. In some scenarios, the term UE can also apply to one or more accessory devices, such as in a device constellation arrangement. One or more of these devices can collectively or individually access a network.

[0054] Referring again to Figure 1 In some aspects, the UE 104 can include a positioning component 198. In some aspects, the positioning component 198 can be configured to receive a set of sidelink control information (SCI), where the set of SCI reserves a set of resources for transmission of a set of sidelink positioning reference signals (SL-PRSs) in at least one same slot, where the set of resources is periodic. In some aspects, the positioning component 198 can be further configured to measure the set of SL-PRSs over a measurement period based on the set of SCI satisfying at least one condition of a set of conditions. In some aspects, the positioning component 198 can be further configured to receive a sidelink control information (SCI), where the SCI reserves one or more SL-PRS resources for transmission of at least one sidelink positioning reference signal (SL-PRS). In some aspects, the positioning component 198 can be further configured to measure the at least one SL-PRS over a measurement period.

[0055] While the following description can focus on 5G NR, the concepts described herein can be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other radio access technologies.

[0056] As described herein, a node (which can be referred to as a node, network node, network entity, or wireless node) can include, be, or can be included in (e.g., as a component of) a base station (e.g., any of the base stations described herein), a UE (e.g., any of the UEs 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 / radio unit (RU) (which can also be referred to as a remote radio unit (RRU)), and / or another processing entity configured to perform any of the techniques described herein. For example, a network node can be a UE. As another example, a network node can be a base station or network entity. As yet another example, a first network node can be configured to communicate with a second network node or a third network node. In one aspect of this example, the first network node can be a UE, the second network node can be a base station, and the third network node can be a UE. In another aspect of this example, the first network node can be a UE, the second network node can be a base station, and the third network node can be a base station. In yet other aspects of this example, the first network node, the second network node, and the third network node can be different with respect to these examples. Similarly, a reference to a UE, a base station, an apparatus, a device, a computing system, etc. can include a disclosure of a UE, a base station, an apparatus, a device, a 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. Once a particular example has been expanded in accordance with the present disclosure (e.g., 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), the broader example of the narrower example can be interpreted in reverse, but in a broad, generic sense. In the above example in which 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, the first network node can refer to a first UE, a first base station, a first apparatus, a first device, a first computing system, a first set of one or more components, or a first processing entity, etc. that is configured to receive the information; and the second network node can refer to a second UE, a second base station, a second apparatus, a second device, a second computing system, a second set of one or more components, or a second processing entity, etc.

[0057] As described herein, different terminology can be used in various aspects to describe the communication of information (e.g., any information, signals, and / or the like). The disclosure of one communication term includes the disclosure of other communication terms. For example, a first network node can be described as being configured to transmit information to a second network node. In this example and consistent with the disclosure, the disclosure that the first network node is configured to transmit information to the second network node includes the disclosure that the first network node is configured to provide, communicate, output, convey, or send information to the second network node. Similarly, in this example and consistent with the disclosure, the disclosure that the first network node is configured to transmit information to the second network node includes the disclosure that the second network node is configured to receive, obtain, or decode the information provided, communicated, output, conveyed, or sent by the first network node.

[0058] Figure 2 A diagram 200 includes example aspects illustrating a slot structure that can be used for sidelink communications (e.g., between UEs 104, RSUs, and / or the like). In some examples, the slot structure can be within a 5G / NR frame structure, or can use aspects of a 5G / NR frame structure. For example, NR CV2X can be based on a NR frame structure. In other examples, the slot structure can be within a LTE frame structure. For example, in some aspects, LTE-based CV2X can use a LTE frame structure. While the following description can focus on 5G NR, the concepts described herein can be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies. Figure 2The example slot structure in FIG. 2 is just one example, and other sidelink communications can have different frame structures and / or different channels for sidelink communications. One frame (10 ms) can be divided into 10 equal size subframes (1 ms). Each subframe can include one or more slots. A subframe can also include mini-slots, which can contain 7, 4, or 2 symbols. Each slot can either contain 7 or 14 symbols, depending on the slot configuration. For slot configuration 0, each slot can contain 14 symbols, and for slot configuration 1, each slot can contain 7 symbols. The diagram 200 illustrates an example sidelink transmission. A physical sidelink control channel can be configured to occupy multiple physical resource blocks (PRBs), e.g., 10, 12, 15, 20, or 25 PRBs. The PSCCH can be limited to a single subchannel. The PSCCH duration can be configured to be, e.g., 2 symbols or 3 symbols. A subchannel can include, e.g., 10, 15, 20, 25, 50, 75, or 100 PRBs. Resources for a sidelink transmission can be selected from a resource pool that includes one or more subchannels. As a non-limiting example, a resource pool can include between 1 and 27 subchannels. A PSCCH size can be established for a resource pool, e.g., to be between 10% and 100% of one subchannel for a duration of 2 symbols or 3 symbols. A physical sidelink shared channel (PSSCH) occupies at least one subchannel. In some aspects, the PSCCH can include a first portion of sidelink control information (SCI), which can be referred to as SCI-1, and the PSSCH can include a second portion of the SCI, which can be referred to as SCI-2. The SCI can indicate information for a receiver to receive a data transmission in the PSSCH. In some aspects, the SCI can indicate resources on which the PSSCH will be transmitted. In such aspects, the SCI can be referred to as including a resource reservation.

[0059] A resource grid can be used to represent the frame structure. Each time slot can include a resource block (RB) (also referred to as a physical RB (PRB)) that extends 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme. As illustrated, some of the REs can include control information in a PSCCH, and some REs can include demodulation RS (DM-RS). There can be a 1:4 ratio between the PSCCH and the DM-RS associated with the PSCCH. There can be a 1:2 ratio between the PSSCH and the DM-RS associated with the PSSCH. At least one symbol can be used for feedback. Figure 2 As illustrated, some of the REs can include control information in a PSCCH, and some REs can include demodulation RS (DM-RS). There can be a 1:4 ratio between the PSCCH and the DM-RS associated with the PSCCH. There can be a 1:2 ratio between the PSSCH and the DM-RS associated with the PSSCH. At least one symbol can be used for feedback. Figure 2An example of a two-symbol Physical Side Link Feedback Channel (PSFCH) with adjacent gap symbols is illustrated. The symbols before and / or after the feedback can be used for the transition between data reception and feedback transmission. This gap allows the device to switch from operating as a transmitting device to preparing to operate as a receiving device, for example, in a subsequent time slot. As illustrated, data can be transmitted in the remaining RE. This data may include the data messages described herein. The positioning of any of the data, DM-RS, SCI, feedback, gap symbols, and / or LBT symbols may differ. Figure 2 The example shown illustrates this. In some respects, multiple time slots can be aggregated together.

[0060] Figure 3 This is a block diagram illustrating communication between a first wireless communication device 310 and a second wireless communication device 350 via a sidelink. In some examples, devices 310 and 350 may communicate via V2X or other D2D communication. This communication may be based on a sidelink using a PC5 interface. Devices 310 and 350 may include UEs, RSUs, base stations, etc. Packets may be provided to a controller / processor 375 that implements Layer 3 and Layer 2 functionality. Layer 3 includes the Radio Resource Control (RRC) layer, and Layer 2 includes the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the Media Access Control (MAC) layer.

[0061] Transmit (TX) processor 316 and receive (RX) processor 370 implement Layer 1 functionality associated with various signal processing functions. Layer 1 (which includes the physical (PHY) layer) may include error detection on the transport channel, forward error correction (FEC) decoding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. TX processor 316 processes the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-order phase shift keying (M-PSK), M-order quadrature amplitude modulation (M-QAM)). The decoded and modulated symbols can then be divided into parallel streams. Each stream can then be mapped to OFDM subcarriers, multiplexed with a reference signal (e.g., a pilot) in the time and / or frequency domains, and then combined using inverse fast Fourier transform (IFFT) to produce a physical channel carrying a stream of time-domain OFDM symbols. The OFDM stream is spatially pre-decoded to generate multiple spatial streams. Channel estimates from channel estimator 374 can be used to determine the decoding and modulation scheme, as well as for spatial processing. The channel estimates can be derived from a reference signal transmitted by device 350 and / or channel condition feedback. Each spatial stream can then be provided to a different antenna 320 via a separate transmitter 318Tx. Each transmitter 318Tx can modulate an RF carrier with the corresponding spatial stream for transmission.

[0062] At device 350, each receiver 354Rx receives signals via its corresponding antenna 352. Each receiver 354Rx recovers the information modulated onto the RF carrier and provides that information to the receive (RX) processor 356. The TX processor 368 and RX processor 356 implement Layer 1 functionality associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial stream destined for device 350. If multiple spatial streams are destined for device 350, the RX processor 356 can combine them into a single OFDM symbol stream. The RX processor 356 then uses a Fast Fourier Transform (FFT) to transform the OFDM symbol stream from the time domain to the frequency domain. The frequency domain signal consists of a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, along with the reference signal, are recovered and demodulated by determining the signal constellation points most likely to be transmitted by device 310. These soft decisions can be based on a channel estimate calculated by the channel estimator 358. The soft decision is then decoded and deinterleaved to recover the data and control signals originally transmitted by device 310 on the physical channel. The data and control signals are then provided to controller / processor 359, which implements layer 3 and layer 2 functionality.

[0063] The controller / processor 359 may be associated with a memory 360 that stores program code and data. The memory 360 may be referred to as a computer-readable medium. The controller / processor 359 provides demultiplexing, packet reassembly, decryption, header decompression, and control signal processing between the transport channel and the logical channel. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operation.

[0064] Similar to the functions described in conjunction with the transmissions performed by device 310, controller / processor 359 can provide RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connectivity, and measurement reporting; PDCP layer functionality associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functionality associated with the transmission of upper-layer PDUs, error correction via ARQ, concatenation, segmentation, and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction via HARQ, priority handling, and logical channel priority ordering.

[0065] The channel estimate derived by the channel estimator 358 from the reference signal or feedback transmitted by the device 310 can be used by the TX processor 368 to select an appropriate decoding and modulation scheme, as well as to facilitate spatial processing. The spatial stream generated by the TX processor 368 can be provided to different antennas 352 via individual transmitters 354Tx. Each transmitter 354Tx can use the corresponding spatial stream to modulate an RF carrier for transmission.

[0066] Transmission is processed at device 310 in a manner similar to that described for the receiver function at device 350. Each receiver 318Rx receives the signal via its corresponding antenna 320. Each receiver 318Rx recovers the information modulated onto the RF carrier and provides that information to the RX processor 370.

[0067] The controller / processor 375 may be associated with a memory 376 that stores program code and data. The memory 376 may be referred to as a computer-readable medium. The controller / processor 375 provides demultiplexing, packet reassembly, decryption, header decompression, and control signal processing between the transport channel and the logical channel. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operation.

[0068] At least one of the TX processor 368, RX processor 356, and controller / processor 359 can be configured to perform coupling. Figure 1 The positioning components of 198 are in various aspects.

[0069] At least one of the TX processor 316, RX processor 370, and controller / processor 375 can be configured to perform coupled operations. Figure 1 The positioning components of 198 are in various aspects.

[0070] Figure 4 Figure 400 illustrates an example of UE positioning based on reference signal measurements. UE 404 can be positioned at time T. SRS_TX Send UL-SRS 412 and at time T PRS_RX Receives the DL positioning reference signal (PRS) (DL-PRS) 410. TRP 406 can be used at time T. SRS_RX Receive UL-SRS 412 and at time T PRS_TX Send DL-PRS 410. UE 404 may receive DL-PRS 410 before sending UL-SRS 412, or may send UL-SRS 412 before receiving DL-PRS 410. In both cases, the location server (e.g., location server 168) or UE 404 may base its response on ||T SRS_RX - T PRS_TX | - |TSRS_TX - T PRS_RX || to determine RTT414. Therefore, multi-RTT positioning can utilize the UERx-Tx time difference measurement (i.e., |T) of downlink signals received from multiple TRPs 402, 406 and measured by UE 404. SRS_TX - T PRS_RX |) and DL-PRS reference signal received power (RSRP) (DL-PRS-RSRP), and the measured TRP Rx-Tx time difference (i.e., |T) of the uplink signal transmitted from UE 404 at multiple TRPs 402, 406. SRS_RX - T PRS_TX |) and UL-SRS-RSRP. UE 404 uses auxiliary data received from the positioning server to measure the UE Rx-Tx time difference (and optionally the DL-PRS-RSRP of the received signal), and TRPs 402, 406 use auxiliary data received from the positioning server to measure the gNB Rx-Tx time difference (and optionally the UL-SRS-RSRP of the received signal). These measurements can be used at the positioning server or at UE 404 to determine the RTT, which is used to estimate the location of UE 404. Other methods for determining the RTT are possible, such as, for example, using DL-TDOA and / or UL-TDOA measurements.

[0071] DL-AoD positioning utilizes the measured DL-PRS-RSRP of downlink signals received at UE 404 from multiple TRPs 402 and 406. UE 404 uses auxiliary data received from the positioning server to measure the DL-PRS-RSRP of the received signals, and the resulting measurement, along with the azimuth departure (A-AoD), zenith departure (Z-AoD), and other configuration information, is used to position UE 404 relative to adjacent TRPs 402 and 406.

[0072] DL-TDOA positioning utilizes the DL Reference Signal Time Difference (RSTD) (and optionally DL-PRS-RSRP) of downlink signals received at UE 404 from multiple TRPs 402, 406. UE 404 uses auxiliary data received from the positioning server to measure the DL RSTD (and optionally DL-PRS-RSRP) of the received signals, and the resulting measurement, along with other configuration information, is used to position UE 404 relative to adjacent TRPs 402, 406.

[0073] UL-TDOA positioning utilizes the UL relative time of arrival (RTOA) (and optionally UL-SRS-RSRP) of the uplink signal transmitted from UE 404 at multiple TRPs 402, 406. TRPs 402, 406 use auxiliary data received from the positioning server to measure the UL-RTOA (and optionally UL-SRS-RSRP) of the received signal, and the resulting measurements, along with other configuration information, are used to estimate the location of UE 404.

[0074] UL-AoA positioning utilizes the azimuth (A-AoA) and zenith (Z-AoA) of the uplink signal transmitted from UE 404 at multiple TRPs 402 and 406. TRPs 402 and 406 use auxiliary data received from the positioning server to measure the A-AoA and Z-AoA of the received signal, and the resulting measurements, along with other configuration information, are used to estimate the position of UE 404.

[0075] Additional positioning methods can be used to estimate the location of UE 404, such as, for example, UE-side UL-AoD and / or DL-AoA. It should be noted that data / measurements from various technologies can be combined in various ways to increase accuracy, determine and / or enhance certainty, supplement / improve measurements, and / or replace / provide missing information.

[0076] Sidelink communication can be based on different types or modes of resource allocation mechanisms. In the first resource allocation mode (which may be referred to herein as "Mode 1"), centralized resource allocation can be provided by a network entity. In Mode 2, each UE can autonomously determine the resources used for sidelink transmission. To coordinate the selection of sidelink resources by each UE, each UE can use sensing technology to monitor the resource reservations of other sidelink UEs and can select resources for sidelink transmission from unreserved resources. Devices communicating based on sidelinks can determine one or more radio resources used by other devices in the time and frequency domains in order to select transmission resources that avoid conflicts with other devices. Sidelink transmission and / or resource reservation can be periodic or aperiodic, where a UE can reserve resources for transmission in the current time slot and up to two future time slots.

[0077] Therefore, in this second mode (e.g., mode 2), each UE can autonomously select resources for sidelink transmission, for example, in the absence of a central entity (such as a base station indicating resources for a device). The first UE can reserve the selected resources to notify other UEs about the resources that the first UE intends to use for sidelink transmission.

[0078] In some examples, resource selection for sidelink communication can be based on sensing mechanisms. For instance, before selecting resources for data transmission, the UE can first determine whether the resources have already been reserved by other UEs.

[0079] For example, as part of a sensing mechanism for resource allocation mode 2, the UE can determine (e.g., sense) whether the selected sidelink resource has been reserved by another UE before selecting it for data transmission. If the UE determines that the sidelink resource has not been reserved by another UE, the UE can use the selected sidelink resource for data transmission, for example, in PSSCH transmission. The UE can estimate or determine which radio resources (e.g., sidelink resources) are in use and / or reserved by other UEs by detecting and decoding sidelink control information (SCI) transmitted by other UEs. The UE can use a sensing-based resource selection algorithm to estimate or determine which radio resources are in use and / or reserved by other UEs. The UE can receive an SCI from another UE, which includes reservation information based on a resource reservation field included in the SCI. The UE continuously monitors (e.g., senses) and decodes SCIs from peer UEs. The SCI may include reservation information, for example, indicating the time slot and RB that a particular UE has selected for future transmission. The UE can exclude resources used and / or reserved by other UEs from a candidate resource set used by the UE for sidelink transmission, and the UE can select / reserve resources from unused resources that thus form the candidate resource set for sidelink transmission. The UE can continuously sense SCIs with resource reservations to maintain a candidate resource set from which it can select one or more resources for sidelink transmission. Once the UE selects candidate resources, it can transmit an SCI indicating its own reservation of resources for sidelink transmission. The amount of resources reserved by the UE (e.g., sub-channels per subframe) can depend on the size of the data to be transmitted by the UE. Although this example is described with respect to the UE receiving reservation information from another UE, reservation information can also be received from the RSU or other devices communicating via the sidelink.

[0080] Figure 5 Example 500, as presented herein, illustrates reserved time and frequency resources for sidelink transmission. For example, resources may be included in a sidelink resource pool. Resource allocation for each UE may be in units of one or more sub-channels in the frequency domain (e.g., sub-channels SC1 to SC4) and may be based on a time slot in the time domain (e.g., time slots "1" to "8"). The UE may also use resources in the current time slot to perform an initial transmission and may reserve resources in future time slots for retransmission. Figure 5In the example shown, two different future time slots are reserved for retransmission by UE1 and UE2. Resource reservation can be limited to a window of predefined time slots and sub-channels, such as an 8-time-slot multiplied by 4-sub-channel window as shown in Example 500, which provides a total of 32 available resource blocks. This window can also be referred to as a resource selection window.

[0081] A first UE (“UE1”) may reserve a sub-channel (e.g., SC 1) in the current time slot (e.g., time slot 1) for its initial data transmission 502, and may reserve additional future time slots within this window for data retransmission (e.g., first data retransmission 504 and second data retransmission 506). For example, the first UE may reserve sub-channel SC 3 at time slot 3 and SC 2 at time slot 4 for future retransmissions, such as... Figure 5As shown. The first UE then sends information to other UEs about which resources it is using and / or reserving. The first UE can do this by including reservation information in the reserved resources field of the SCI (e.g., the first-level SCI (SCI 1)). There may be a second-level SCI (SCI 2). As an example, SCI 2 may be mapped to consecutive RBs in the PSSCH starting from the first symbol associated with the PSSCH DM-RS. The format of SCI 2 may be indicated in the first-level SCI. SCI 1 may be sent in the PSCCH. Multiple resource elements (REs) may be derived based on SCI 1. The starting position of SCI 2 may be defined and known to the UE. In some respects, the UE may not perform blind decoding of SCI 2. The SCI 2 format may include one or more of the following: HARQ procedure identifier (ID), New Data Indicator (NDI), source ID, destination ID, CSI report trigger, etc. The SCI 2 format associated with multicast may also include an area ID indicating the location of the transmitter and the communication range used to transmit feedback. SCI 1 for the Dedicated Resource Pool (RP) can be used for SL-PRS scheduling. SCI 1 for SL-PRS scheduling may have the format SCI 1-B and may include information about: priority, source identifier (ID), destination ID, broadcast type indicator indicating the broadcast type (e.g., unicast, broadcast, or multicast), resource reservation period, SL-PRS request, etc. Regarding SL-PRS configuration and / or SL-PRS time assignment information, in some aspects, there may be a one-to-one mapping between PSCCH resources and associated SL-PRS resources in the same time slot, and explicit signaling for that SL PRS resource may not exist for the same time slot. The same number of PSCCH resources and SL-PRS resources may also exist. In some aspects, explicit signaling for SL PRS resources may exist in the same time slot. In some aspects, there may be a mapping between PSCCH resources and one or more associated SL-PRS resources in the same time slot, and explicit signaling for SL PRS resources may exist. In some respects, if explicit signaling is not used, a one-to-one mapping can be used between PSCCH resources and associated SL-PRS resources in the same time slot. However, with a one-to-one mapping, some SL-PRS resources may not be mapped.

[0082] Figure 5 Example: Resources in subchannels SC3 and SC4 reserved in time slot "1" by a second UE ("UE2") are used for current data transmission 508, first data retransmission using subchannels SC3 and SC4 is reserved in time slot 4 510, and second data retransmission using subchannels SC1 and SC2 is reserved in time slot 7 512, as shown. Figure 5As shown. Similarly, the second UE can send resource usage and reservation information to other UEs, for example, by using the reserved resource field in the SCI.

[0083] The third UE may consider selecting resources reserved by other UEs within a resource selection window to transmit its data. The third UE may first decode the SCI within a time period to identify which resources are available (e.g., candidate resources). For example, the third UE may exclude resources reserved by UE1 and UE2 and may select other available sub-channels and time slots from the candidate resources for its transmission and retransmission, based on the number of adjacent sub-channels that the data to be transmitted (e.g., packets) can be adapted to.

[0084] Although Figure 5 The example illustrates that resources are reserved for the initial transmission and two retransmissions, but this reservation can be used for the initial transmission and a single retransmission or only for the initial transmission.

[0085] The UE can determine associated signal measurements (such as RSRP) for each resource reservation received by another UE. The UE can consider resources reserved in transmissions for which it measures an RSRP below a threshold to be available for its use. The UE can perform signal / channel measurements on sidelink resources already reserved and / or used by other UEs, such as by measuring the RSRP of messages (e.g., SCIs) for reserving sidelink resources. Based at least in part on signal / channel measurements, the UE can consider using / reusing sidelink resources already reserved by other UEs. For example, if the measured RSRP reaches or exceeds a threshold, the UE can exclude the reserved resource from the candidate resource set, and if the measured RSRP of the message used to reserve the resource is below the threshold, the UE can consider the reserved resource to be available. When a message reserving a resource has an RSRP below a threshold, the UE can include these resources in the candidate resource set and use / reuse such reserved resources because a low RSRP indicates that the other UE is far away, and reusing these resources is unlikely to interfere with that UE. A higher RSRP indicates that the transmitting UE, which has reserved resources, is potentially closer to the UE, and if the UE selects the same resources, the transmitting UE may experience a higher level of interference.

[0086] For example, the UE can determine a candidate resource set (e.g., by monitoring SCIs from other UEs and removing resources reserved by other UEs for signals where the UE measures an RSRP above a threshold). The UE can also select N resources for transmission and / or retransmission of a TB. For example, the UE can randomly select N resources from a previously determined candidate resource set. For each transmission, the UE can reserve future time and frequency resources for the initial transmission and up to two retransmissions. The UE can reserve resources by transmitting an SCI indicating resource reservation. For example, in... Figure 5In the example, the second UE can send an SCI that reserves resources for current data transmission 508, first data retransmission 510, and second data retransmission 512.

[0087] A timeline may exist for sensing-based resource selection. For example, a UE may sense and decode SCIs received from other UEs during a sensing window (e.g., the duration prior to resource selection). Based on the sensing history during the sensing window, the UE can maintain an available candidate resource set by excluding resources reserved by other UEs from the candidate resource set. A UE may select resources from its available candidate resource set and transmit SCIs that reserve the resources selected by that UE for sidelink transmission (e.g., PSSCH transmission). A time gap may exist between the UE's resource selection and the UE's transmission of the SCI for the reserved resources.

[0088] Figure 6 This is a diagram 600 illustrating an example side-link time slot structure according to various aspects of this disclosure. For example... Figure 6 As illustrated, a time slot may include 14 OFDM symbols, and the first symbol may be repeated over previous symbols for automatic gain control (AGC). Slot symbol 614 may appear after PSSCH 612. PSCCH 610 and PSSCH 612 may be transmitted in the same time slot. The PSCCH may carry SCI 1, and SCI 1 may include resource allocation information and other fields for receiving-side link-shared channel PSSCH transmission. Figure 6 PSFCH 616 is also shown.

[0089] Figure 7 Figure 700 is an example illustrating the configuration of a sidelink positioning reference signal (PRS) and a resource pool (RP-P) for positioning. Figure 7 As illustrated, in some wireless communication systems, sidelink communication configurations (such as sidelink positioning configurations, sidelink data configurations, or configurations jointly used for data and positioning) may include SL frequency configurations and may be associated with point A (which may be a common reference point of the resource block grid and may be represented by the frequency offset or absolute frequency between point A and the lowest subcarrier of the lowest resource block used by the UE for initial cell selection), SL bandwidth portion (BWP) configuration, PSBCH configuration, resource pool for positioning, SCS, BW, location, etc., or an SCS carrier list. The SCS carrier list may be associated with SCS-specific configurations for bandwidth, location, etc.

[0090] In some aspects, the SL BWP configuration can be associated with a Tx resource pool for Mode 1 (Mode A), a Tx resource pool for Mode 2 (Mode B), and an Rx resource pool. In some aspects, a per-resource-pool configuration can be provided. The per-resource-pool configuration may include PSSCH / PSCCH / PSFCH configuration, number of sub-channels, size or starting RB, and channel busy rate (CBR), modulation and decoding scheme (MCS), sensing configuration or power control configuration.

[0091] In some aspects, the resource pool, SCS, BW, location, etc., used for positioning can be associated with the Tx resource pool for Mode 1 (Mode A), the Tx resource pool for Mode 2 (Mode B), and the Rx resource pool. In some aspects, per-resource-pool configuration can be provided. Per-resource-pool configuration may include PSCCH or SL-PRS configuration (e.g., including the number of symbols, comb type, comb offset, number of sub-channels, sub-channel size, sub-channel start RB, etc.), CBR, MCS, sensing configuration, or power control configuration.

[0092] Figure 8 This is a diagram 800 illustrating an example measurement cycle. For example... Figure 8 As illustrated, at 802, when the UE's PHY layer receives a message that provides location-related data or triggers location (such as a Multi-RTT-ProvideAssistanceData message providing auxiliary data for multi-RTT location or a Multi-RTT-RequestLocationInformation message requesting multi-RTT measurements), the UE can (e.g., based on UE capabilities) measure multiple UE Rx-Tx time difference measurements in the location frequency layer configured for the UE within a measurement period (e.g., in time units), which can be... ms. The term "measurement period" can refer to the time interval during which a UE can perform measurements for positioning based on a message that triggers the measurement. For example... Figure 8 As illustrated, multiple PRSs may exist (e.g., they may be sent periodically), including PRS 804A, PRS 804B, PRS 804C, PRS 804D, PRS 804E, PRS 804F, PRS 804G, PRS 804H, and PRS 804I. The start time 806 of the measurement window may be included in a message providing location-related data or triggering location (such as a Multi-RTT-RequestLocationInformation message). The end time 808 of the measurement window may be based on the UE's capabilities. Measurement Period After both the Multi-RTT-RequestLocationInformation message and the Multi-RTT-ProvideAssistanceData message from the LMF are delivered to the UE's PHY layer via the positioning protocol, the process can begin with the first measurement gap (MG) instance aligned with the DL PRS resource of the positioning frequency layer i that is closest in time.

[0093] In some wireless communication systems, the UE can measure at least four samples before sending a measurement report back to the network. For example, parameters... This can represent the measurement period of the PRS RSTD measurement in PRS frequency layer i, and is specified as: .

[0094] parameter This is the UE Rx beam scanning factor, which can be based on the frequency range in which the UE is operating. For example, for FR1, the UE Rx beam scanning factor could be 1, while for FR2, the UE Rx beam scanning factor could be 8. Parameter This is the carrier-specific scaling factor for NR PRS-based positioning measurements in frequency layer i. Parameter It is the number of PRSRSTD samples, and It can be equal to four. The total measurement cycle can be determined by... Indicate, and for example .parameter It is the index of the positioning frequency layer, parameter It is the total number of positioning frequency layers, and the parameters This refers to the periodicity of PRS RSTD measurements in the positioning frequency layer i. Parameters The measurement period for PRS RSTD measurements in positioning frequency layer i can be specified as: .parameter This is the UE Rx beam scanning factor. Parameter This is the carrier-specific scaling factor for NR PRS-based positioning measurements in frequency layer i. Parameter This is the maximum number of DL PRS resources configured in the positioning frequency layer i within the time slot. Parameter This refers to the UE's capacity to process the number of DL-PRS resources in a time slot, as indicated by information elements (e.g., maxNumOfDL-PRS-ResProcessedPerSlot). Parameter The available PRS in the positioning frequency layer i to be measured is... The duration of the period, calculated in the same way as the PRS duration K. PRS resources that are not silent and fully or partially overlap with the MG can be considered for the parameter. The calculation of parameters. This is the number of PRS RSTD samples. Parameter It is the measurement duration used to locate the last PRS RSTD sample in frequency layer i, including sampling time and processing time. Can be equal to + .parameter The duration corresponding to the PRS processing symbol in each Tms can be determined by the information element. durationOfPRS- ProcessingSymbolsInEveryTms Instructions. Parameters Can be equal to Examples of T can include 8, 16, 20, 30, 40, 80, 160, 320, 640, 1280, etc. It can be... and The parameter of least common multiple between This can be the repetitive periodicity of the measurement gap applicable to measurements in PRS frequency layer i. Parameter This refers to the periodicity of silent DL-PRS resources on positioning frequency layer i. In some aspects, the measurement period can be extended if the MG mode is reconfigured during the measurement period of one or more positioning frequency layers.

[0095] SL transmissions can reserve resources in the current time slot and in multiple (e.g., two) future time slots. SL transmissions with reserved resources can be SCIs, and the reservation can be located within a window of a specific number (e.g., 32) logical time slots. In some aspects, such as combining... Figure 5 The described feature supports non-periodic reservation. In some aspects, periodic reservation is supported. In some aspects, periodicity with configurable values ​​can be signaled in the SCI. Periodic resource reservation and signaling can be enabled or disabled based on configuration. Figure 9 This is an example of a periodically reserved illustration 900. For example... Figure 9 As illustrated, resources can be reserved in the first window for initial transmission 902A, subsequent transmissions 904A, and subsequent transmissions 906A. Resources can also be reserved in the second window for first transmission 902B, subsequent transmissions 904B, and subsequent transmissions 906B. Resources can also be reserved in the third window for first transmission 902C, subsequent transmissions 904C, and subsequent transmissions 906C. The time between windows can be based on a period with a configurable value.

[0096] In some respects, SCI can reserve resources for one, two, or three transmissions. The maximum number of reservations allowed is configurable. In some respects, all reservations can be used for the same number of sub-channels, and the starting sub-channels can be different or the same among the reservations. Figure 10 This is an example diagram 1000 illustrating multiple send-reserved resources for SCI. For example... Figure 10 As illustrated, the first reservation performed by SCI can reserve resource 1008 with two SCs. The second reservation performed by SCI can reserve resource 1010 with two SCs. The third reservation performed by SCI can reserve resource 1012 with two SCs. The first reservation can begin at time slot i, where i can be 1. The second reservation can begin at time slot i+x, where i+x can be 1+3. The third reservation can begin at time slot i+y, where i+y can be 1+6. The number of SCs reserved can be z, where z can be equal to 2.

[0097] For SL-PRS transmission, both SL-PRS transmission with periodic reservation and SL-PRS transmission without periodic reservation are supported. SL-PRS transmission with periodic reservation can be SL-PRS transmission that reserves resources based on SL periodic resource reservation. SL-PRS transmission without periodic reservation can be SL-PRS transmission in which the SL-PRS is transmitted at least once without periodic reservation. The aspects provided in this document provide mechanisms for defining the measurement period of both SL-PRS transmission with and without periodic reservation, thereby facilitating sidelink localization.

[0098] In some respects, the measurement period for SL-PRS measurement reports can be defined separately for each SL-PRS resource. For example, for each SL-PRS resource, the start time of the measurement period is the first time slot after the SL-PRS resource is configured in the RP (or received in the auxiliary data), or (e.g., and / or) the first time slot after the SCI for scheduling a given SL-PRS resource is received.

[0099] In some respects, the measurement period for SL-PRS measurement reports can be defined for a set of SL-PRS resources configured for the UE. For example, a set of SL-PRS resources may correspond to all of the following SL-PRS resources: (1) configured in the same SL resource pool, (2) configured with the same message (e.g., the same SL-AssistanceDataMessage), (3) associated with the same location session ID, and (4) associated with the same source ID or destination ID. In some respects, for a set of SL-PRS resources, the start time of the measurement period is the first time slot after (1) the configuration of the SL-PRS resource group is defined or (2) the configuration of the SL-PRS resource group is defined and the first SCI of one of the SL-PRS resources in the group is received.

[0100] Figure 11 Figure 1100 illustrates example communication between at least two UEs (UE 1102 and UE 1104). One or more additional UEs 1104N may also be involved. UE 1104 and one or more additional UEs 1104N may send an SCI set 1106 to UE 1102. The SCI set 1106 may include SCI format 1-B for reserving resources for an SL-PRS set 1110. In some aspects, the SCI set 1106 may include SCI format 1-B for SL-PRS transmissions with or without periodic reservations. In some aspects, the resources reserved for the SL-PRS set 1110 may be periodic. In some aspects, the resources reserved for the SL-PRS set 1110 may be non-periodic.

[0101] The resources reserved for the SL-PRS set 1110 are periodic aspects used to determine the number of samples for a single measurement period (e.g., by...). The number of samples used to determine a single measurement period (represented by 1) can be 1 or greater than 1. This can be one aspect where all reserved resources signaled using a single SCI are considered part of a single sample. In some aspects of this, UE 802 can report a single measurement utilizing all reserved resources signaled using a single SCI. The number of samples used to determine the measurement period for a single measurement (where...) In some aspects, possibly more than one, each reserved resource in the reserved resources signaled by a single SCI is considered a sample. In some of these aspects, UE 802 may report measurements of each reserved resource in the reserved resources signaled by a single SCI. In some aspects, if the number of samples used to determine a measurement period is greater than one, the measurement period may be applied under one or more conditions. UE 802 may receive multiple SCIs in SCI set 1106, and each SCI may schedule SL-PRS in SL-PRS set 1110 at least in the current time slot (and may include additional reservations within the SCI's X time slot (e.g., X=32) window), and may also include non-zero resource reservation periods (by...). (This indicates that) the non-zero resource reservation period can be based on the periodicity of the reservation. In some aspects, one or more conditions may include using the same periodicity ( SCI scheduling (e.g., within each SCI) spans multiple reservations ( The first condition for scheduling SL-PRS resources. For example, the first SCI in SCI set 1106 schedules the first SCI in SL-PRS set 1110, which includes the first SCI in SL-PRS set 1110. The first SL-PRS, then the second SCI schedulable SL-PRS set 1110 in SCI set 1106 includes the same The second SL-PRS, except for the last SL-PRS, can be 0 (meaning no other periodic reservations are used). In some respects, this one or more conditions can be included in all A second condition is that all SCIs in the SCI 1106 set schedule the same SL-PRS resource ID in the reservation (e.g., all SCIs in the SCI 1106 set schedule the same SL-PRS resource ID). In some respects, this one or more conditions may be included in all A third condition is that all SCIs in the SCI set 1106 are scheduled based on the same bandwidth. In some aspects, if the same bandwidth is not used, the minimum bandwidth among all bandwidths can be used for accuracy determination. In some aspects, this one or more conditions may include... This corresponds to the number of reservations completed within a single period (e.g., all SCIs in SCI set 1106 are scheduled with the same number within a single period). The fourth condition. In some respects, this one or more conditions may include cross-... A fifth condition is reserved for using the same number of SL-PRS symbols to derive a single measurement (e.g., all SCIs in SCI set 1106 schedule the same number of SL-PRS symbols to derive a single measurement). In some aspects, this one or more conditions may include... A sixth condition is reserved for using the same source ID to derive a single measurement (e.g., all SCIs in SCI set 1106 indicate the same source ID for a single measurement). In some aspects, this one or more conditions may include... A seventh condition is reserved for using the same destination ID to derive a single measurement (e.g., all SCIs in SCI set 1106 indicate the same destination ID for a single measurement). In some aspects, one or more conditions may include... An eighth condition is reserved for using the same broadcast type to derive a single measurement (e.g., all SCIs in SCI set 1106 indicate the same broadcast type in multicast, broadcast, or unicast). The conditions described herein can be applied as independent conditions or any combination of conditions.

[0102] In some respects, UE 802 can measure SL-PRS set 1110 at 1108 and can generate a single measurement or multiple measurements within measurement period 1150 (e.g., based on whether SCI set 1106 or SL-PRS set 1110 meets the conditions).

[0103] The resources reserved for the SL-PRS set 1110 are some non-periodic aspects used to determine the number of samples for a single measurement period. There can be one or more. The number of samples used to determine a single measurement period ( ) () can be some aspects of one, and all reserved resources signaled by one SCI are considered to be part of one sample.

[0104] In some respects, at 1112, the measurement period may be extended or restarted if one or more of the following conditions are met: (1) a change in the coverage status of UE 802 in the measurement period specification (e.g., between coverage, outside coverage, and partial coverage) and UE behavior for SL positioning; (2) a change in the SL-PRS resource configuration or resource pool configuration of UE 802; (3) a handover of UE 802; (4) an RRC reconstruction to a network entity; and (5) a change in the synchronization source of UE 802.

[0105] Figure 12 This is an example of SL-PRS and its associated periodic reservation, as shown in diagram 1200.Figure 12 As illustrated, resources can be reserved in the first window for the initial transmission 1202A and subsequent transmission 1206A. Resources can also be reserved in the second window for the first transmission 1202B and subsequent transmission 1206B. Resources can also be reserved in the third window for the first transmission 1202C and subsequent transmission 1206C. The periodicity can be the same, and the first time 1208A between the reservations in the first instance 1210A and the second instance 1210B can be equal to the second time 1208B between the reservations in the second instance 1210B and the third instance 1210C.

[0106] Figure 13 This is a flowchart 1300 of a wireless communication method. The method can be performed by a UE (e.g., UE 104, UE 1102; device 1704).

[0107] At 1302, the UE may receive an SCI set, wherein the SCI set is a set of transmission reserved resources for at least one SL-PRS set in the same time slot, and the resource set is periodic. For example, UE 1102 may receive an SCI set (e.g., 1106), wherein the SCI set is a set of transmission reserved resources for at least one SL-PRS set (e.g., 1110) in the same time slot, and the resource set is periodic. In some aspects, 1302 may be performed by the positioning component 198.

[0108] At 1304, the UE can measure the SL-PRS set within a measurement period based on the SCI set satisfying at least one condition in the condition set. For example, UE 1102 can measure (e.g., at 1108) the SL-PRS set within a measurement period (e.g., 1150) based on the SCI set satisfying at least one condition in the condition set. In some aspects, 1304 can be performed by the positioning component 198.

[0109] Figure 14 This is a flowchart 1400 of a wireless communication method. The method can be performed by a UE (e.g., UE 104, UE 1102; device 1704).

[0110] At 1402, the UE may receive an SCI set, wherein the SCI set is a set of transmission reserved resources for at least one SL-PRS set in the same time slot, and the resource set is periodic. For example, UE 1102 may receive an SCI set (e.g., 1106), wherein the SCI set is a set of transmission reserved resources for at least one SL-PRS set (e.g., 1110) in the same time slot, and the resource set is periodic. In some aspects, 1402 may be performed by the positioning component 198.

[0111] At 1404, the UE can measure the SL-PRS set within a measurement period based on the SCI set satisfying at least one condition in the condition set. For example, UE 1102 can measure (e.g., at 1108) the SL-PRS set within a measurement period (e.g., 1150) based on the SCI set satisfying at least one condition in the condition set. In some aspects, 1404 can be performed by the positioning component 198. In some aspects, the measurement period is based on the number of multiple samples associated with the SCI set. In some aspects, the condition set includes a condition that each resource in the resource set is associated with the same periodicity. In some aspects, the condition set includes a condition that the same SL-PRS resource ID is associated with each SCI in the SCI set. In some aspects, the condition set includes a condition that each SCI in the SCI set is associated with the same bandwidth. In some aspects, the condition set includes a condition that each SCI in the SCI set is associated with a corresponding bandwidth including the same bandwidth. In some aspects, the condition set includes a condition that the number of multiple samples is equal to the number of each SCI in the SCI set. In some aspects, an SL-PRS set is associated with a group of SL-PRS resources including a resource set based on at least one of the following: the same sidelink resource pool associated with the SL-PRS set, the same sidelink auxiliary data messages associated with the SL-PRS set, the same location session associated with the SL-PRS set, or the same destination or the same source associated with the SL-PRS set. In some aspects, the start time of the measurement period corresponds to the time after the configuration of the SL-PRS set and after the first SCI schedules one SL-PRS from the group of SL-PRS resources. In some aspects, the start time of the measurement period corresponds to the time after the configuration of the SL-PRS set.

[0112] At 1406, the UE may extend or restart the measurement period based on at least one of the following: a change in coverage status associated with the UE, a change in SL-PRS resource configuration or resource pool configuration associated with the UE, a handover associated with the UE, a radio resource control (RRC) reconstruction with a network entity, or a change in synchronization source associated with the UE. For example, UE 1102 may extend or restart the measurement period based on at least one of the following: a change in coverage status associated with the UE, a change in SL-PRS resource configuration or resource pool configuration associated with the UE, a handover associated with the UE, a radio resource control (RRC) reconstruction with a network entity, or a change in synchronization source associated with the UE. In some aspects, 1406 may be performed by the positioning component 198.

[0113] In some aspects, to measure the SL-PRS set within a measurement period, at 1408, the UE may generate a single measurement based on the SL-PRS set. For example, UE 1102 may generate (e.g., at 1108) a single measurement based on the SL-PRS set. In some aspects, 1408 may be performed by the positioning component 198. In some aspects, the UE may generate a single measurement based on the SL-PRS set, wherein the condition set includes conditions that each SL-PRS in the SL-PRS set is associated with the same number of symbols. In some aspects, the UE may generate a single measurement based on the SL-PRS set, wherein the condition set includes conditions that each SL-PRS in the SL-PRS set is associated with the same source. In some aspects, the UE may generate a single measurement based on the SL-PRS set, wherein the condition set includes conditions that each SL-PRS in the SL-PRS set is associated with the same destination. In some respects, the UE may generate a single measurement based on a set of SL-PRS, wherein the set of conditions includes the conditions associated with each SL-PRS in the set of SL-PRS for the same broadcast type (e.g., broadcast, multicast, or unicast).

[0114] At 1410, the UE can output a measurement based on the measured SL-PRS set. For example, UE 1102 can output a measurement based on the measured SL-PRS set. In some aspects, 1410 can be performed by the positioning component 198. In order to output a measurement based on the measured SL-PRS set, the UE can transmit the measurement based on the measured SL-PRS set, or store the measurement based on the measured SL-PRS set.

[0115] Figure 15 This is a flowchart 1500 of a wireless communication method. The method can be performed by a UE (e.g., UE 104, UE 1102; device 1704).

[0116] At 1502, the UE may receive an SCI, wherein the SCI reserves one or more SL-PRS resources for the transmission of at least one SL-PRS. For example, UE 1102 may receive an SCI (e.g., 1106), wherein the SCI reserves one or more SL-PRS resources for the transmission of at least one SL-PRS (e.g., 1110). In some aspects, 1502 may be performed by the positioning component 198.

[0117] At 1504, the UE may measure at least one SL-PRS during the measurement cycle. For example, UE 1102 may measure (e.g., at 1108) at least one SL-PRS during the measurement cycle (e.g., 1150). In some aspects, 1504 may be performed by the positioning component 198. In some aspects, the measurement cycle is based on the number of SL-PRS resources associated with the measurement cycle.

[0118] Figure 16 This is a flowchart 1600 of a wireless communication method. The method can be performed by a UE (e.g., UE 104, UE 1102; device 1704).

[0119] At 1602, the UE may receive an SCI, wherein the SCI reserves one or more SL-PRS resources for the transmission of at least one SL-PRS. For example, UE 1102 may receive an SCI (e.g., 1106), wherein the SCI reserves one or more SL-PRS resources for the transmission of at least one SL-PRS (e.g., 1110). In some aspects, 1602 may be performed by the positioning component 198.

[0120] At 1604, the UE may measure at least one SL-PRS during the measurement cycle. For example, UE 1102 may measure (e.g., at 1108) at least one SL-PRS during the measurement cycle (e.g., 1150). In some aspects, 1604 may be performed by the positioning component 198. In some aspects, the measurement cycle is based on the number of SL-PRS resources associated with the measurement cycle.

[0121] At 1606, the UE may extend or restart the measurement period based on at least one of the following: a change in coverage status associated with the UE, a change in SL-PRS resource configuration or resource pool configuration associated with the UE, a handover associated with the UE, a radio resource control (RRC) reconstruction with a network entity, or a change in synchronization source associated with the UE. For example, UE 1102 may extend or restart the measurement period based on at least one of the following: a change in coverage status associated with the UE, a change in SL-PRS resource configuration or resource pool configuration associated with the UE, a handover associated with the UE, a radio resource control (RRC) reconstruction with a network entity, or a change in synchronization source associated with the UE. In some aspects, 1606 may be performed by the positioning component 198.

[0122] At 1608, the UE may generate a single measurement for one or more SL-PRS resources, or generate one or more measurements for one or more SL-PRS resources. For example, UE 1102 may generate a single measurement for one or more SL-PRS resources, or generate one or more measurements for one or more SL-PRS resources (e.g., at 1108). In some aspects, 1608 may be performed by the positioning component 198.

[0123] At 1610, the UE may output a measurement based on at least one measured SL-PRS. For example, UE 1102 may output a measurement based on at least one measured SL-PRS. In some aspects, 1610 may be performed by the positioning component 198. In some aspects, for the purpose of outputting an indication, the UE may transmit the measurement based on at least one measured SL-PRS, or store the measurement based on at least one measured SL-PRS.

[0124] Figure 17Figure 1700 illustrates an example of a hardware implementation for device 1704. Device 1704 may be a UE, a component of a UE, or an implementation of UE functionality. In some aspects, device 1704 may include at least one cellular baseband processor 1724 (also referred to as a modem) coupled to one or more transceivers 1722 (e.g., cellular RF transceivers). Cellular baseband processor 1724 may include at least one on-chip memory 1724'. In some aspects, device 1704 may also include one or more Subscriber Identity Module (SIM) cards 1720 and at least one application processor 1706 coupled to a Secure Digital Card (SD) card 1708 and a screen 1710. Application processor 1706 may include on-chip memory 1706'. In some aspects, device 1704 may also include a Bluetooth module 1712, a WLAN module 1714, an SPS module 1716 (e.g., a GNSS module), one or more sensor modules 1718 (e.g., a barometric pressure sensor / altimeter; motion sensors such as an inertial measurement unit (IMU), a gyroscope, and / or an accelerometer; light detection and ranging (LIDAR), radio-assisted detection and ranging (RADAR), sound navigation and ranging (SONAR), a magnetometer, audio, and / or other technologies for positioning), an additional memory module 1726, a power source 1730, and / or a camera 1732. Bluetooth module 1712, WLAN module 1714, and SPS module 1716 may include on-chip transceivers (TRX) (or in some cases, only receivers (RX)). Bluetooth module 1712, WLAN module 1714, and SPS module 1716 may include their own dedicated antennas and / or communicate using antenna 1780. Cellular baseband processor 1724 communicates with UE 104 and / or RU associated with network entity 1702 via transceiver 1722 through one or more antennas 1780. Cellular baseband processor 1724 and application processor 1706 may each include computer-readable media / memory 1724', 1706' respectively. Additional memory module 1726 may also be considered as computer-readable media / memory. Each computer-readable media / memory 1724', 1706', 1726 may be non-transitory. Cellular baseband processor 1724 and application processor 1706 are each responsible for general processing, including the execution of software stored on the computer-readable media / memory. When executed by cellular baseband processor 1724 / application processor 1706, the software causes cellular baseband processor 1724 / application processor 1706 to perform the various functions described above. The computer-readable media / memory can also be used to store data manipulated by cellular baseband processor 1724 / application processor 1706 during software execution.Cellular baseband processor 1724 / application processor 1706 may be a component of device 350 and may include at least one memory 360 and / or at least one of the following: TX processor 368, RX processor 356, and controller / processor 359. In one configuration, device 1704 may be at least one processor chip (modem and / or application) and may only include cellular baseband processor 1724 and / or application processor 1706, while in another configuration, device 1704 may be the entire UE (e.g., see below). Figure 3 The device 350) and includes an additional module of the device 1704.

[0125] As discussed above, the positioning component 198 may be configured to receive a set of Side Link Control Information (SCI), wherein the SCI set is a set of reserved resources for the transmission of at least one set of Side Link Positioning Reference Signals (SL-PRS) in the same time slot, and wherein the resource set is periodic. In some aspects, the positioning component 198 may be further configured to measure a set of SL-PRS within a measurement period based on the SCI set satisfying at least one condition in a set of conditions. In some aspects, the positioning component 198 may be further configured to receive Side Link Control Information (SCI), wherein the SCI reserves one or more SL-PRS resources for the transmission of at least one Side Link Positioning Reference Signal (SL-PRS). In some aspects, the positioning component 198 may be further configured to measure at least one SL-PRS within a measurement period. The positioning component 198 may be located within a cellular baseband processor 1724, an application processor 1706, or both a cellular baseband processor 1724 and an application processor 1706. Component 198 may be one or more hardware components specifically configured to execute the stated process / algorithm, implemented by one or more processors configured to execute the stated process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination thereof. When multiple processors are implemented, the multiple processors may execute the stated process / algorithm individually or in combination. As shown, apparatus 1704 may include a variety of components configured for various functions. In one configuration, apparatus 1704, and particularly cellular baseband processor 1724 and / or application processor 1706, may include components for receiving a set of SCIs, wherein the SCI set is a set of reserved resources for transmission of at least one SL-PRS set in the same time slot, and wherein the resource set is periodic. In some aspects, apparatus 1704 may include components for measuring the SL-PRS set within a measurement period based on the SCI set satisfying at least one condition in a set of conditions. In some aspects, apparatus 1704 may include components for receiving an SCI, wherein the SCI reserves one or more SL-PRS resources for transmission of at least one SL-PRS. In some aspects, apparatus 1704 may include components for measuring at least one SL-PRS during a measurement cycle. In some aspects, apparatus 1704 may include components for outputting measurements based on a set of measured SL-PRS. In some aspects, apparatus 1704 may include components for transmitting measurements based on a set of measured SL-PRS. In some aspects, apparatus 1704 may include components for storing measurements based on a set of measured SL-PRS. In some aspects, apparatus 1704 may include components for generating a single measurement based on a set of SL-PRS, wherein the condition set includes conditions associated with each SL-PRS in the set of SL-PRS and the same number of symbols.In some aspects, apparatus 1704 may include components for generating a single measurement based on a set of SL-PRS, wherein the condition set includes conditions that each SL-PRS in the set is associated with the same source. In some aspects, apparatus 1704 may include components for generating a single measurement based on a set of SL-PRS, wherein the condition set includes conditions that each SL-PRS in the set is associated with the same destination. In some aspects, apparatus 1704 may include components for generating a single measurement based on a set of SL-PRS, wherein the condition set includes conditions that each SL-PRS in the set is associated with the same broadcast type. In some aspects, apparatus 1704 may include components for extending or restarting a measurement cycle based on at least one of the following: a change in coverage status associated with the UE, a change in SL-PRS resource configuration or resource pool configuration associated with the UE, a handover associated with the UE, a radio resource control (RRC) re-establishment with a network entity, or a change in synchronization source associated with the UE. In some aspects, apparatus 1704 may include components for outputting measurements based on at least one measured SL-PRS. In some aspects, apparatus 1704 may include components for transmitting measurements based on at least one measured SL-PRS. In some aspects, apparatus 1704 may include components for storing measurements based on at least one measured SL-PRS. In some aspects, apparatus 1704 may include components for generating a single measurement for one or more SL-PRS resources. In some aspects, apparatus 1704 may include components for generating one or more measurements for one or more SL-PRS resources. The component may be component 198 of apparatus 1704 configured to perform the functions described therein. As described above, apparatus 1704 may include a TX processor 368, an RX processor 356, and a controller / processor 359. Therefore, in one configuration, the component may be the TX processor 368, the RX processor 356, and / or the controller / processor 359 configured to perform the functions described therein.

[0126] It should be understood that the specific order or hierarchy of the boxes in the disclosed process / flowcharts is merely an example of the exemplary method. It should be understood that the specific order or hierarchy of the boxes in the process / flowcharts may be rearranged based on design preferences. Furthermore, some boxes may be combined or omitted. The appended method claims present the elements of various boxes in a sample order, but are not limited to the given specific order or hierarchy.

[0127] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not limited to the aspects described herein but should be given the full scope consistent with the language of the claims. Unless specifically stated otherwise, references to elements in the singular form do not mean “one and only one” but rather “one or more.” Terms such as “if,” “when,” and “simultaneously” do not imply a direct temporal relationship or reaction. That is, these phrases, such as “when…”, do not imply an immediate action in response to the occurrence of an action or during the occurrence of an action, but simply suggest that if a condition is met, then the action will occur, without requiring a specific or immediate time limit for the occurrence of the action. The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or superior to other aspects. Unless otherwise specifically stated, the term “some” refers to one or more. Combinations such as "at least one of A, B, or C", "one or more of A, B, or C", "at least one of A, B, and C", "one or more of A, B, and C", and "A, B, C, or any combination thereof" include any combination of A, B, and / or C, and may include multiple A, multiple B, or multiple C. Specifically, combinations such as "at least one of A, B, or C", "one or more of A, B, or C", "at least one of A, B, and C", "one or more of A, B, and C", and "A, B, C, or any combination thereof" may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, wherein any such combination may contain one or more members of A, B, or C. A set should be interpreted as a collection of elements in which the number of elements is one or more. Therefore, for a set of X, X will include one or more elements. When at least one processor is configured to execute a set of functions, the at least one processor is configured to execute the set of functions individually or in any combination. Therefore, each of the at least one processor can be configured to perform a specific subset of the set of functions, wherein the subset is the complete set, a suitable subset of the set, or an empty subset of the set. If the first device receives data from or sends data to the second device, data can be received / sent directly between the first and second devices, or indirectly between the first and second devices via a set of devices. A device configured to “output” data (such as transmission, signaling, or a message) can, for example, transmit the data using a transceiver, or can transmit the data to the device that sent the data. A device configured to “receive” data (such as transmission, signaling, or a message) can, for example, receive the data using a transceiver, or can obtain the data from the device that received the data.Information stored in memory includes instructions and / or data. All structural and functional equivalents of the elements throughout the various aspects described herein that are known to or will later be known to a person skilled in the art are expressly incorporated herein by reference and are covered by the claims. Furthermore, nothing disclosed herein is intended to be offered to the public, whether or not such disclosure is explicitly recited in the claims. The terms “module,” “mechanism,” “element,” “device,” etc., cannot replace the word “component.” Therefore, no claim element will be construed as a functional component unless the element is explicitly described using the phrase “component for…”.

[0128] As used in this article, the phrase “based on” should not be interpreted as referring to a closed set of information, one or more conditions, one or more factors, etc. In other words, the phrase “based on A” (where “A” can be information, conditions, factors, etc.) should be interpreted as “based on at least A”, unless otherwise stated otherwise.

[0129] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0130] Aspect 1 is a method for wireless communication performed by a user equipment (UE), the method comprising: receiving a set of side link control information (SCI), wherein the set of SCI is a set of transmission reserved resources for at least one set of side link positioning reference signals (SL-PRS) in the same time slot, wherein the set of resources is periodic; and measuring the SL-PRS set within a measurement period based on the SCI set satisfying at least one condition in a set of conditions.

[0131] Aspect 2 is the method described in aspect 1, wherein the method further includes: outputting measurements based on the measured SL-PRS set.

[0132] Aspect 3 is the method of aspect 2, wherein, in order to output the measurement based on the measured SL-PRS set, the method further includes: sending the measurement based on the measured SL-PRS set; or storing the measurement based on the measured SL-PRS set.

[0133] Aspect 4 is the method of any one of Aspects 1 to 3, wherein the measurement period is based on the number of multiple samples associated with the SCI set.

[0134] Aspect 5 is the method described in aspect 4, wherein the set of conditions includes conditions associated with the same periodicity for each resource in the set of resources.

[0135] Aspect 6 is the method of any one of Aspects 4 to 5, wherein the set of conditions includes conditions associated with the same SL-PRS resource identifier (ID) for each SCI in the set of SCIs.

[0136] Aspect 7 is the method of any one of Aspects 4 to 6, wherein the set of conditions includes conditions associated with the same bandwidth for each SCI in the set of SCIs.

[0137] Aspect 8 is the method of any one of Aspects 4 to 7, wherein the set of conditions includes a condition associated with each SCI in the set of SCIs and a corresponding bandwidth including the same bandwidth.

[0138] Aspect 9 is the method of any one of Aspects 4 to 8, wherein the set of conditions includes the condition that the number of the plurality of samples is equal to the same number for each SCI in the SCI set.

[0139] Aspect 10 is the method of any one of Aspects 4 to 9, wherein, in order to measure the SL-PRS set within the measurement period, the method further includes: generating a single measurement based on the SL-PRS set, wherein the set of conditions includes conditions associated with each SL-PRS in the SL-PRS set for the same number of symbols.

[0140] Aspect 11 is the method of any one of Aspects 4 to 10, wherein, in order to measure the SL-PRS set within the measurement period, the method further includes: generating a single measurement based on the SL-PRS set, wherein the set of conditions includes conditions associated with the same source for each SL-PRS in the SL-PRS set.

[0141] Aspect 12 is the method of any one of Aspects 4 to 11, wherein, in order to measure the SL-PRS set within the measurement period, the method further includes: generating a single measurement based on the SL-PRS set, wherein the set of conditions includes conditions associated with each SL-PRS in the SL-PRS set for the same destination.

[0142] Aspect 13 is the method of any one of Aspects 4 to 12, wherein, in order to measure the SL-PRS set within the measurement period, the method further includes: generating a single measurement based on the SL-PRS set, wherein the set of conditions includes conditions associated with each SL-PRS in the SL-PRS set for the same broadcast type.

[0143] Aspect 14 is the method of any one of Aspects 1 to 13, wherein the SL-PRS set is associated with a set of SL-PRS resources including the resource set based on at least one of the following: the same sidelink resource pool associated with the SL-PRS set, the same sidelink auxiliary data message associated with the SL-PRS set, the same location session associated with the SL-PRS set, or the same destination or the same source associated with the SL-PRS set.

[0144] Aspect 15 is the method of aspect 14, wherein the start time of the measurement period corresponds to the time after the configuration of the SL-PRS set and after the first SCI schedules one of the SL-PRS resources in the set of SL-PRS resources.

[0145] Aspect 16 is the method of any one of Aspects 1 to 14, wherein the start time of the measurement cycle corresponds to the time after the configuration of the SL-PRS set.

[0146] Aspect 17 is the method of any one of Aspects 1 to 16, wherein the method further comprises: extending or restarting the measurement period based on at least one of the following: a change in coverage status associated with the UE, a change in SL-PRS resource configuration or resource pool configuration associated with the UE, a handover associated with the UE, a radio resource control (RRC) reconstruction with a network entity, or a change in synchronization source associated with the UE.

[0147] Aspect 18 is the method of any one of aspects 1 to 17, the method further comprising: receiving the SCI set via at least one of a transceiver or an antenna.

[0148] Aspect 19 is a method for wireless communication performed by a user equipment (UE), the method comprising: receiving side link control information (SCI), wherein the SCI reserves one or more SL-PRS resources for the transmission of at least one side link positioning reference signal (SL-PRS); and measuring the at least one SL-PRS during a measurement period.

[0149] Aspect 20 is the method of aspect 19, wherein the method further includes: outputting a measurement based on at least one SL-PRS measured.

[0150] Aspect 21 is the method of aspect 20, wherein, in order to output the measurement based on at least one SL-PRS, the method further includes: transmitting the measurement based on at least one SL-PRS; or storing the measurement based on at least one SL-PRS.

[0151] Aspect 22 is the method of any one of Aspects 19 to 21, wherein the measurement period is based on the number of SCIs associated with the measurement period, and wherein measuring the at least one SL-PRS further includes: generating a single measurement for the one or more SL-PRS resources.

[0152] Aspect 23 is the method of any one of Aspects 19 to 22, wherein the measurement period is based on the number of SL-PRS resources associated with the measurement period, and wherein measuring the at least one SL-PRS further comprises: generating one or more measurements for the one or more SL-PRS resources.

[0153] Aspect 24 is the method of any one of Aspects 19 to 23, wherein the method further comprises: extending or restarting the measurement period based on at least one of: a change in coverage status associated with the UE, a change in SL-PRS resource configuration or resource pool configuration associated with the UE, a handover associated with the UE, a radio resource control (RRC) reconstruction with a network entity, or a change in synchronization source associated with the UE.

[0154] Aspect 25 is the method of aspect 19, the method further comprising: receiving the SCI via at least one of a transceiver or an antenna.

[0155] Aspect 26 is an apparatus for wireless communication at a device (such as a UE), the apparatus including at least one memory and at least one processor coupled to the at least one memory and based at least in part on information stored in the at least one memory, the at least one processor being configured individually or in combination to implement any one of aspects 1 to 25.

[0156] Aspect 27 is the apparatus described in aspect 26, and the apparatus further includes: one or more transceivers or one or more antennas coupled to the at least one processor.

[0157] Aspect 28 is an apparatus for wireless communication at a device, the apparatus including components for implementing any one of aspects 1 to 25.

[0158] Aspect 29 is a computer-readable medium (e.g., a non-transitory computer-readable medium) storing computer-executable code, wherein the code, when executed by at least one processor, causes the at least one processor to implement any one of aspects 1 to 25.

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: at least one memory; and at least one processor coupled to the at least one memory and configured to, based at least in part on information stored in the at least one memory, individually or in any combination: receive a set of sidelink control information (SCI), wherein the set of SCI reserves a set of resources for transmission of a set of sidelink positioning reference signals (SL-PRSs) in at least one same time slot, wherein the set of resources is periodic; and measure the set of SL-PRSs over a measurement period based on the set of SCI satisfying at least one condition of a set of conditions.

2. The apparatus of claim 1, wherein the at least one processor is further configured to, individually or in any combination: output a measurement based on the measured set of SL-PRSs.

3. The apparatus of claim 2, wherein to output the measurement based on the measured set of SL-PRSs, the at least one processor is configured to, individually or in any combination: transmit the measurement based on the measured set of SL-PRSs; or store the measurement based on the measured set of SL-PRSs.

4. The apparatus of claim 1, wherein the measurement period is based on a number of samples associated with the set of SCI.

5. The apparatus of claim 4, wherein the set of conditions includes a condition that each resource of the set of resources is associated with a same periodicity.

6. The apparatus of claim 4, wherein the set of conditions includes a condition that a same SL-PRS resource identifier (ID) is associated with each SCI of the set of SCI.

7. The apparatus of claim 4, wherein the set of conditions includes a condition that each SCI of the set of SCI is associated with a same bandwidth.

8. The apparatus of claim 4, wherein the set of conditions includes a condition that each SCI of the set of SCI is associated with a respective bandwidth that includes a same bandwidth.

9. The apparatus of claim 4, wherein the set of conditions includes a condition that the number of samples is equal to a same number for each SCI of the set of SCI.

10. The apparatus of claim 4, wherein to measure the set of SL-PRSs over the measurement period, the at least one processor is configured to, individually or in any combination: generate a single measurement based on the set of SL-PRSs, wherein the set of conditions includes a condition that each SL-PRS of the set of SL-PRSs is associated with a same number of symbols.

11. The apparatus of claim 4, wherein to measure the set of SL-PRSs over the measurement period, the at least one processor is configured to, individually or in any combination: generate a single measurement based on the set of SL-PRSs, wherein the set of conditions includes a condition that each SL-PRS of the set of SL-PRSs is associated with a same source.

12. The apparatus of claim 4, wherein to measure the set of SL-PRSs within the measurement period, the at least one processor, singly or in any combination, is configured to: generate a single measurement based on the set of SL-PRSs, wherein the set of conditions includes a condition that each SL-PRS of the set of SL-PRSs is associated with a same destination.

13. The apparatus of claim 4, wherein to measure the set of SL-PRSs within the measurement period, the at least one processor, singly or in any combination, is configured to: generate a single measurement based on the set of SL-PRSs, wherein the set of conditions includes a condition that each SL-PRS of the set of SL-PRSs is associated with a same broadcast type.

14. The apparatus of claim 1, wherein the set of SL-PRSs is associated with a set of SL-PRS resources comprising the set of resources based on at least one of: a same sidelink resource pool associated with the set of SL-PRSs, a same sidelink assistance data message associated with the set of SL-PRSs, a same positioning session associated with the set of SL-PRSs, or a same destination or a same source associated with the set of SL-PRSs.

15. The apparatus of claim 14, wherein a start time of the measurement period corresponds to a time after a configuration of a set of SL-PRSs and after a first SCI schedules one of the set of SL-PRS resources.

16. The apparatus of claim 1, wherein a start time of the measurement period corresponds to a time after a configuration of a set of SL-PRSs.

17. The apparatus of claim 1, wherein the at least one processor, singly or in any combination, is further configured to: extend or restart the measurement period based on at least one of: a change in a coverage status associated with the UE, a change in an SL-PRS resource configuration or a resource pool configuration associated with the UE, a handover associated with the UE, a radio resource control (RRC) reestablishment with a network entity, or a change in a synchronization source associated with the UE.

18. The device of claim 1, further comprising: at least one of a transceiver or an antenna coupled to the at least one processor, wherein to receive the set of SCI, the at least one processor, singly or in any combination, is configured to receive the set of SCI via at least one of the transceiver or the antenna.

19. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: at least one memory; and at least one processor coupled to the at least one memory and configured to: receive a sidelink control information (SCI), wherein the SCI reserves one or more SL-PRS resources for transmission of at least one sidelink positioning reference signal (SL-PRS); and measure the at least one SL-PRS in a measurement period.

20. The apparatus of claim 19, wherein the at least one processor is further configured to, individually or in any combination: output a measurement based on the measured at least one SL-PRS.

21. The apparatus of claim 20, wherein to output the measurement based on the measurement based on the measured SL-PRS, the at least one processor is configured to, individually or in any combination: transmit the measurement based on the measured at least one SL-PRS; or store the measurement based on the measured at least one SL-PRS.

22. The apparatus of claim 19, wherein the measurement period is based on a number of SCIs associated with the measurement period, and wherein to measure the at least one SL-PRS, the at least one processor is configured to, individually or in any combination: generate a single measurement for the one or more SL-PRS resources.

23. The apparatus of claim 19, wherein the measurement period is based on a number of SL-PRS resources associated with the measurement period, and wherein to measure the at least one SL-PRS, the at least one processor is configured to, individually or in any combination: generate one or more measurements for the one or more SL-PRS resources.

24. The apparatus of claim 19, wherein the at least one processor is further configured to, individually or in any combination: extend or restart the measurement period based on at least one of a change in a coverage status associated with the UE, a change in a SL-PRS resource configuration associated with the UE, or a resource pool configuration, a handover associated with the UE, a radio resource control (RRC) reestablishment with a network entity, or a change in a synchronization source associated with the UE.

25. The device of claim 19, further comprising: at least one of a transceiver or an antenna coupled to the at least one processor, wherein to receive the SCI, the at least one processor is configured to, individually or in any combination, receive the SCI via at least one of the transceiver or the antenna.

26. A method for wireless communication performed by a user equipment (UE), the method comprising: receiving a set of sidelink control information (SCI), wherein the set of SCI reserves a set of resources for transmission of a set of sidelink positioning reference signals (SL-PRSs) in at least one same time slot, wherein the set of resources is periodic; and performing a measurement based on the set of SL-PRSs. to measure the set of SL-PRSs over a measurement period based on the set of SCIs satisfying at least one condition of a set of conditions.

27. The method of claim 26, wherein the measurement period is based on a number of samples associated with the set of SCIs.

28. The method of claim 27, wherein the set of conditions comprises a condition that each resource of the set of resources is associated with a same periodicity.

29. The method of claim 27, wherein the set of conditions comprises a condition that a same SL-PRS resource identifier (ID) is associated with each SCI of the set of SCIs.

30. A method for wireless communications performed by a user equipment (UE), comprising: receiving a sidelink control information (SCI), wherein the SCI reserves one or more SL-PRS resources for transmission of at least one sidelink positioning reference signal (SL-PRS); and measuring the at least one SL-PRS in a measurement period.

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