To improve multi-RTT positioning in scenarios with limited processing power, define the association between PRS and SRS.

Abstract

Aspects presented herein may enable a UE to indicate to a base station a list of PRS resources that the UE intends to measure at a given opportunity. In one aspect, the UE determines an association between one or more reception properties of one or more PRS resources and one or more transmission properties of one or more SRS resources. The UE transmits information to at least one serving BS indicating one or more PRS resources that the UE is configured to measure at future measurement occasions. The UE measures the PRS received from one or more BSs on the one or more PRS resources based on the one or more reception properties. The UE transmits the SRS on the one or more SRS resources based on the one or more transmission properties to the one or more BSs after measuring the PRS.

Description

Technical Field

[0001] Cross-Reference to Related Applications

[0001] This application claims the benefit of Greek Patent Application No. 20210100258, filed April 14, 2021, and entitled "DEFINING PRS & SRS ASSOCIATION TO IMPROVE MULTI-RTT POSITIONING IN PROCESSING CAPABILITY CONSTRAINED SCENARIOS", the entire content of which is expressly incorporated herein by reference.

[0002]

[0002] The present disclosure relates generally to communication systems, and more specifically, to wireless communication involving positioning.

Background Art

[0003] Introduction

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

[0004]

[0004] These multiple access technologies are employed in various telecommunications standards to provide a common protocol that enables different wireless devices to communicate at urban, national, regional, and even global levels. An exemplary telecommunications standard is 5G New Radio (NR). 5G NR is part of the Continuing Mobile Broadband Development announced by the Third Generation Partnership Project (3GPP®) to meet new requirements related to latency, reliability, security, scalability (for example, related to the Internet of Things (IoT)), and other requirements. 5G NR includes services related to Enhanced Mobile Broadband (eMBB), Massive Machine Type Communications (mMTC), and Ultra-High Reliability Low Latency Communications (URLLC). Some aspects of 5G NR can be based on the 4G Long-Term Evolution (LTE®) standard. Further improvements to 5G NR technology are needed. These improvements may also be applicable to other multiple access technologies and the telecommunications standards that employ these technologies. [Overview of the Initiative]

[0005]

[0005] The following provides a simplified overview of one or more embodiments in order to provide a basic understanding of such embodiments. This overview is not a comprehensive overview of all intended embodiments, nor does it identify the main or important elements of all embodiments, nor does it define the scope of any or all embodiments. Its sole purpose is to present some concepts of one or more embodiments in a simplified form as an introduction to the more detailed explanations to be presented later.

[0006]

[0006] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus for wireless communication in user equipment (UE) are provided. The apparatus determines an association between one or more reception properties of one or more positioning reference signal (PRS) resources and one or more transmission properties of one or more sounding reference signal (SRS) resources. The apparatus transmits information to at least one serving base station (BS) indicating one or more PRS resources that the UE is configured to measure on a future measurement occasion. The apparatus measures the PRS received from one or more BS on one or more PRS resources based on one or more reception properties. After measuring the PRS, the apparatus transmits SRS on one or more SRS resources to one or more BS based on one or more transmission properties.

[0007]

[0007] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus for wireless communication at a base station are provided. The apparatus receives information from a UE indicating one or more PRS resources that the UE is configured to measure or has measured in a single measurement occasion. The apparatus transmits a PRS on one or more PRS resources indicated based on one or more transmit properties. After transmitting the PRS, the apparatus receives an SRS from the UE on one or more SRS resources based on one or more receive properties associated with one or more transmit properties. The apparatus measures the received SRS on one or more SRS resources corresponding to the indicated one or more PRS resources.

[0008]

[0008] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus for wireless communication in a UE are provided. The apparatus receives information from at least one serving BS indicating one or more SRS resources or one or more PRS resources corresponding to one or more SRS resources, one or more SRS resources being associated with one or more transmit properties. The apparatus transmits SRS to one or more BS based on one or more transmit properties, the SRS being transmitted on the indicated one or more SRS resources or on one or more SRS resources corresponding to the indicated one or more PRS resources. After transmitting the SRS, the apparatus prioritizes measuring PRS received from at least one BS on one or more PRS resources in a single measurement opportunity, the PRS being received based on one or more receive properties associated with one or more transmit properties.

[0009]

[0009] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus for wireless communication at a base station are provided. The apparatus measures an SRS received from a UE on one or more SRS resources on a measurement opportunity. The apparatus determines a subset of SRS resources of one or more SRS resources, the subset of SRS resources corresponding to one or more receiving properties on a BS. The apparatus transmits a PRS to the UE on one or more PRS resources based on one or more transmitting properties on a BS, the one or more PRS resources corresponding to the determined subset of SRS resources, the one or more transmitting properties associated with one or more receiving properties.

[0010]

[0010] To achieve the above-mentioned and related objectives, one or more embodiments shall have features that are fully described below and, in particular, indicated in the claims. The following description and accompanying drawings shall describe in detail some exemplary features of one or more embodiments. However, these features shall represent only a few of the various ways in which the principles of various embodiments may be employed, and this description shall include all such embodiments and their equivalents. [Brief explanation of the drawing]

[0011] [Figure 1]

[0011] A diagram showing an example of a wireless communication system and access network according to the embodiments presented herein. [Figure 2A]

[0012] A diagram illustrating an example of the first frame according to various aspects of this disclosure. [Figure 2B]

[0013] A diagram illustrating an example of a downlink (DL) channel within a subframe according to various aspects of this disclosure. [Figure 2C]

[0014] A diagram illustrating an example of a second frame according to various aspects of this disclosure. [Figure 2D]

[0015] FIGURE illustrating an example of an uplink (UL) channel within a subframe, in accordance with various aspects of the present disclosure. [Figure 3]

[0016] FIGURE illustrating an example of a base station and a UE within an access network. [Figure 4]

[0017] FIGURE illustrating an example of UE positioning based on reference signal measurements. [Figure 5A]

[0018] FIGURE illustrating an example of DL-PRS transmitted from a plurality of TRPs. [Figure 5B] FIGURE illustrating an example of UL-SRS transmitted from a UE. [Figure 6]

[0019] FIGURE illustrating an example of estimating a UE position based on multi-RTT measurements from a plurality of TRPs or base stations. [Figure 7]

[0020] COMMUNICATION FLOW diagram illustrating an example of a UE communicating with a base station regarding DL-PRS resources to be measured, in accordance with aspects of the present disclosure. [Figure 8]

[0021] COMMUNICATION FLOW diagram illustrating an example of a UE communicating with a plurality of base stations regarding DL-PRS resources to be measured, in accordance with aspects of the present disclosure. [Figure 9]

[0022] COMMUNICATION FLOW diagram illustrating an example of a base station indicating a list of UL-SRS to a UE for the UE to prioritize corresponding DL-PRS measurements, in accordance with aspects of the present disclosure. [Figure 10]

[0023] FIGURE illustrating an example of a base station determining a list of UL-SRS resources that a UE may use to prioritize its DL-PRS measurements based on previous measurement instances. [Figure 11]

[0024] FLOWCHART of a method for wireless communication in accordance with aspects presented herein. [Figure 12]

[0025] FIGURE illustrating an example of a hardware implementation for an example apparatus in accordance with aspects presented herein. [Figure 13]

[0026] A flowchart of a wireless communication method according to aspects presented in this specification. [Figure 14]

[0027] A diagram illustrating an example of a hardware implementation for an exemplary apparatus according to aspects presented in this specification. [Figure 15]

[0028] A flowchart of a wireless communication method according to aspects presented in this specification. [Figure 16]

[0029] A diagram illustrating an example of a hardware implementation for an exemplary apparatus according to aspects presented in this specification. [Figure 17]

[0030] A flowchart of a wireless communication method according to aspects presented in this specification. [Figure 18]

[0031] A diagram illustrating an example of a hardware implementation for an exemplary apparatus according to aspects presented in this specification. DETAILED DESCRIPTION OF EMBODIMENTS

[0012]

[0032] The detailed description of embodiments set forth below with reference to the accompanying drawings is intended as a description of various configurations, and is not intended to represent only the configurations in which the concepts described in this specification may 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 may 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 such concepts.

[0013]

[0033] Next, several embodiments of telecommunications systems are presented with respect to various devices and methods. These devices and methods are described in embodiments for carrying out the following inventions and are shown in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as “elements”). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0014]

[0034] For example, an element, or any part of an element, or any combination of elements, may be implemented as a “processing system” comprising one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, system-on-chip (SoCs), baseband processors, field-programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gate logic, discrete hardware circuits, and other suitable hardware configured to perform various functions described throughout this disclosure. One or more processors in a processing system may execute software. Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc., regardless of the names used, such as software, firmware, middleware, microcode, and hardware description languages.

[0015]

[0035] Accordingly, in one or more exemplary embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on a computer-readable medium or encoded on a computer-readable medium as one or more instructions or codes. Computer-readable medium includes computer storage medium. Storage medium may be any available medium that can be accessed by a computer. Such computer-readable medium may include, but not limited to, 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 computer-readable mediums of the types described above, 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.

[0016]

[0036] Figure 1 shows an example of a wireless communication system and access network 100. The wireless communication system (also called a Wireless Wide Area Network (WWAN)) includes a base station 102, an UE 104, an Advanced Packet Core (EPC) 160, and another core network 190 (for example, a 5G core (5GC)). The base station 102 may include macrocells (high-power cellular base stations) and / or small cells (low-power cellular base stations). Macrocells include base stations. Small cells include femtocells, picocells, and microcells.

[0017]

[0037] Embodiments presented herein may improve positioning based on multi-RTT measurements for a UE and a base station. Embodiments presented herein may enable the base station / LMF and the UE to communicate with each other to prioritize measurements for DL-PRS and / or UL-SRS resources, so that the correct pair of DL-PRS / UL-SRS resources can be measured by the UE and the base station to improve the performance and accuracy of positioning based on multi-RTT measurements.

[0018]

[0038] In some embodiments, the UE 104 may include a PRS / SRS process component 198 configured to show the base station a list of PRS resources that the UE intends to measure on a given occasion and / or receive from the base station a list of SRS resources on which the UE may prioritize measuring its PRS based at least in part on the list. In one configuration, the PRS / SRS process component 198 may be configured to determine associations between one or more receive properties of one or more PRS resources and one or more transmit properties of one or more SRS resources. In such a configuration, the PRS / SRS process component 198 may transmit to at least one serving BS information indicating one or more PRS resources that the UE is configured to measure on a future measurement opportunity. In such a configuration, the PRS / SRS process component 198 may measure the PRS received from one or more BS on one or more PRS resources based on one or more receive properties. In such a configuration, the PRS / SRS process component 198 may transmit the SRS on one or more SRS resources based on one or more transmit properties to one or more BS after measuring the PRS. In an alternative configuration, the PRS / SRS process component 198 may be configured to receive information from at least one serving BS indicating one or more SRS resources or one or more PRS resources corresponding to one or more SRS resources, and one or more SRS resources being associated with one or more transmit properties. In such a configuration, the PRS / SRS process component 198 may transmit SRS to one or more BS based on one or more transmit properties, and the SRS may be transmitted on the indicated one or more SRS resources or on one or more SRS resources corresponding to the indicated one or more PRS resources.In such a configuration, the PRS / SRS process component 198 may, after transmitting an SRS, prioritize measuring a PRS received from at least one BS on one or more PRS resources in a single measurement opportunity, where the PRS is received based on one or more receiving properties associated with one or more transmitting properties.

[0019]

[0039] In some embodiments, the base station 102 / 180 may include a PRS / SRS configuration component 199 configured to receive from the UE a list of PRS resources that the UE intends to measure on a given occasion and / or to show the UE a list on which the UE may prioritize the measurement of its PRS based at least in part on a list of SRS resources. In one configuration, the PRS / SRS configuration component 199 may be configured to receive from the UE information indicating one or more PRS resources that the UE is configured to measure or has measured on a single measurement occasion. In such a configuration, the PRS / SRS configuration component 199 may transmit a PRS on one or more PRS resources indicated based on one or more transmit properties. In such a configuration, after transmitting a PRS, the PRS / SRS configuration component 199 may receive an SRS from the UE on one or more SRS resources based on one or more receive properties associated with one or more transmit properties. In such a configuration, the PRS / SRS configuration component 199 may measure the received SRS on one or more SRS resources corresponding to one or more PRS resources indicated. In an alternative configuration, the PRS / SRS component 199 may be configured to measure SRS received from the UE on one or more SRS resources during a measurement opportunity. In such a configuration, the PRS / SRS component 199 may determine a subset of SRS resources of one or more SRS resources, the subset of SRS resources corresponding to one or more receiving properties in the BS. In such a configuration, the PRS / SRS component 199 may transmit PRS to the UE on one or more PRS resources based on one or more transmitting properties in the BS, the one or more PRS resources corresponding to the determined subset of SRS resources, the one or more transmitting properties associated with one or more receiving properties.

[0020]

[0040] A base station 102 configured for 4G LTE (collectively referred to as the Advanced Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC 160 through a first backhaul link 132 (e.g., the S1 interface). A base station 102 configured for 5G NR (collectively referred to as the Next Generation RAN (NG-RAN)) may interface with the core network 190 through a second backhaul link 184. In addition to other functions, base station 102 may perform one or more of the following functions: user data transfer, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection setup and release, load balancing, delivery for non-access layer (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment tracing, RAN information management (RIM), paging, positioning, and warning message delivery. Base station 102 may communicate with each other directly or indirectly (e.g., through EPC 160 or core network 190) over a third backhaul link 134 (e.g., X2 interface). The first backhaul link 132, the second backhaul link 184, and the third backhaul link 134 may be wired or wireless.

[0021]

[0041] Base station 102 can communicate wirelessly with UE 104. Each base station 102 can provide communication coverage to its respective geographical coverage area 110. There may be overlapping geographical coverage areas 110. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network containing both small cells and macro cells may be known as a heterogeneous network. A heterogeneous network may also include home-evolved node B (eNB) (HeNB) that can serve a limited group known as a limited subscriber group (CSG). The communication link 120 between base station 102 and UE 104 may include uplink (UL) transmissions from UE 104 to base station 102 (also called a reverse link) and / or downlink (DL) transmissions from base station 102 to UE 104 (also called a forward link). Communication link 120 may use multiple-input multiple-output (MIMO) antenna techniques, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link may be through one or more carriers. Base station 102 / UE104 may use the spectrum of the highest Y MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.) bandwidth per carrier, allocated in carrier aggregation of the highest total Yx MHz (x component carriers) used for transmission in each direction. Carriers may be adjacent or not adjacent to each other. Carrier allocation may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL ​​than for UL). Component carriers may include primary component carriers and one or more secondary component carriers. Primary component carriers may be called primary cells (PCells), and secondary component carriers may be called secondary cells (SCells).

[0022]

[0042] Several UE104s may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use the DL / UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as the Physical Sidelink Broadcast Channel (PSBCH), Physical Sidelink Discovery Channel (PSDCH), Physical Sidelink Share Channel (PSSCH), and Physical Sidelink Control Channel (PSCCH). D2D communication may be through various wireless D2D communication systems, such as WiMedia, Bluetooth®, ZigBee®, Wi-Fi® based on the IEEE 802.11 standard, LTE, or NR.

[0023]

[0043] The wireless communication system may further include a Wi-Fi access point (AP) 150 communicating with a Wi-Fi station (STA) 152 via a communication link 154, for example, in the 5 GHz unlicensed frequency spectrum. When communicating in the unlicensed frequency spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) before communication to determine whether the channel is available.

[0024]

[0044] Small cell 102' may operate in licensed and / or unlicensed frequency spectrums. When operating in an unlicensed frequency spectrum, small cell 102' may employ NR and use the same unlicensed frequency spectrum (e.g., 5 GHz) used by Wi-Fi AP150. Small cell 102' employing NR in an unlicensed frequency spectrum may enhance coverage to the access network and / or increase the capacity of the access network.

[0025]

[0045] The electromagnetic spectrum is often subdivided into various classes, bands, channels, etc., based on frequency / wavelength. In 5G NR, the two initial operating bands are identified as frequency range designations FR1 (410 MHz to 7.125 GHz) and FR2 (24.25 GHz to 52.6 GHz). Frequencies between FR1 and FR2 are often referred to as midband frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the “sub-6 GHz” band in various documents and papers. A similar naming problem sometimes occurs with FR2, which is often (interchangeably) referred to as the “millimeter wave” band in documents and papers, even though FR2 is different from the extremely high frequency (EHF) band (30 GHz to 300 GHz) which is identified by the International Telecommunication Union (ITU) as the “millimeter wave” band.

[0026]

[0046] With the above aspects in mind, unless otherwise specified, terms such as "sub-6GHz" can broadly refer to frequencies that may be below 6GHz, within FR1, or include midband frequencies, as used herein. Furthermore, unless otherwise specified, terms such as "millimeter wave" can broadly refer to frequencies that may include midband frequencies, within FR2, or within the EHF band, as used herein.

[0027]

[0047] Base station 102 may include and / or be referred to as an eNB, g-node B (gNB), or other type of base station, whether it is a small cell 102' or a large cell (e.g., a macro base station). Some base stations, such as gNB180, may operate in communication with UE104 in the conventional sub-6 GHz spectrum, in millimeter-wave frequencies, and / or near-millimeter-wave frequencies. When gNB180 operates at millimeter-wave or near-millimeter-wave frequencies, gNB180 may be referred to as a millimeter-wave base station. A millimeter-wave base station 180 may utilize beamforming 182 with UE104 to compensate for path loss and short range. Base station 180 and UE104 may each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays, to enable beamforming.

[0028]

[0048] Base station 180 may transmit a beamformed signal to UE 104 in one or more transmit directions 182'. UE 104 may receive a beamformed signal from base station 180 in one or more receive directions 182''. UE 104 may also transmit a beamformed signal to base station 180 in one or more transmit directions. Base station 180 may receive a beamformed signal from UE 104 in one or more receive directions. Base station 180 / UE 104 may perform beam training to determine the best receive and transmit directions for each of them. The transmit and receive directions for base station 180 may or may not be the same. The transmit and receive directions for UE 104 may or may not be the same.

[0029]

[0049] EPC160 may include a Mobility Management Entity (MME) 162, another MME 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. MME 162 may communicate with a Home Subscriber Server (HSS) 174. MME 162 is the control node that handles signaling between UE 104 and EPC160. Generally, MME 162 provides bearer and connectivity management. All user Internet Protocol (IP) packets are forwarded through the Serving Gateway 166, which itself connects to the PDN Gateway 172. The PDN Gateway 172 provides IP address allocation for the UE and other functions. The PDN Gateway 172 and the BM-SC 170 connect to the IP Service 176. IP service 176 may include the Internet, intranet, IP multimedia subsystem (IMS), PS streaming service, and / or other IP services. BM-SC170 may provide functionality for MBMS user service provisioning and distribution. BM-SC170 may act as an entry point for content provider MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. MBMS gateway 168 may be used to distribute MBMS traffic to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area broadcasting specific services, and may be responsible for session management (start / stop) and collecting eMBMS-related billing information.

[0030]

[0050] The core network 190 may include Access and Mobility Management Function (AMF) 192, other AMFs 193, Session Management Function (SMF) 194, and User Plane Function (UPF) 195. AMF 192 may communicate with Unified Data Management (UDM) 196. AMF 192 is a control node that handles signaling between UE 104 and the core network 190. Generally, AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are forwarded through UPF 195. UPF 195 provides IP address allocation for the UE and other functions. UPF 195 connects to IP services 197. IP services 197 may include the Internet, intranet, IP Multimedia Subsystem (IMS), Packet Switched (PS) Streaming (PSS) services, and / or other IP services.

[0031]

[0051] Base stations include and / or may be referred to as gNB, node B, eNB, access point, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), transmit / receive point (TRP), or any other preferred term. Base station 102 provides UE104 with an access point to EPC160 or core network 190. Examples of UE104 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablets, smart devices, wearable devices, vehicles, electric meters, gas pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other similar functional devices. Some of UE104 may be referred to as IoT devices (e.g., parking meters, gas pumps, toasters, vehicles, cardiac monitors, etc.). The UE104 may also be referred to as station, mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or any other preferred term.

[0032]

[0052] Figure 2A is Figure 200, which shows an example of a first subframe in a 5G NR frame structure. Figure 2B is Figure 230, which shows an example of a DL channel in a 5G NR subframe. Figure 2C is Figure 250, which shows an example of a second subframe in a 5G NR frame structure. Figure 2D is Figure 280, which shows an example of a UL channel in a 5G NR subframe. The 5G NR frame structure can be frequency division duplex (FDD) where, for a given set of subcarriers (carrier system bandwidth), the subframes within the set of subcarriers are dedicated to either DL or UL, or it can be time division duplex (TDD) where, for a given set of subcarriers (carrier system bandwidth), the subframes within the set of subcarriers are dedicated to both DL and UL. In the example provided in Figures 2A and 2C, the 5G NR frame structure is assumed to be TDD, with subframe 4 consisting of slot format 28 (mostly DL), where D is DL, U is UL, and F is flexible for use between DL / UL, and subframe 3 consisting of slot format 1 (all UL). Although subframes 3 and 4 are shown in slot formats 1 and 28 respectively, any particular subframe may consist of any of the various available slot formats 0-61. Slot formats 0 and 1 are all DL and UL, respectively. The other slot formats 2-61 include a mixture of DL, UL, and flexible symbols. UE is configured in slot format through the received slot format indicator (SFI) (dynamically through DL control information (DCI) or semi-statically / statically through radio resource control (RRC) signaling). Note that the following description also applies to the 5G NR frame structure which is TDD.

[0033]

[0053] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10 ms) can be divided into 10 equally sized subframes (1 ms). Each subframe may contain one or more time slots. A subframe may also contain minislots that may contain 7, 4, or 2 symbols. Each slot may contain 7 or 14 symbols depending on the slot configuration. In slot configuration 0, each slot may contain 14 symbols, and in slot configuration 1, each slot may contain 7 symbols. Symbols on DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. Symbols on UL may be CP-OFDM symbols (for high-throughput scenarios) or Discrete Fourier Transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also called Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols) (for power-limited scenarios limited to single-stream transmission). The number of slots in a subframe is based on the slot configuration and numerology. In slot configuration 0, different numerologies μ0-4 allow for 1, 2, 4, 8, and 16 slots per subframe, respectively. In slot configuration 1, different numerologies 0-2 allow for 2, 4, and 8 slots per subframe, respectively. Therefore, in slot configuration 0 and numerology μ, there are 14 symbols / slot and 2 μ There are 1 slot / subframe. The subcarrier interval and symbol length / duration are functions of numerology. The subcarrier interval is 2 μ*This can be equal to 15kHz, where μ is numerology 0 to 4. Thus, numerology μ=0 has a subcarrier interval of 15kHz, and numerology μ=4 has a subcarrier interval of 240kHz. Symbol length / duration is inversely related to subcarrier interval. Figures 2A to 2D provide examples of slot configuration 0 with 14 symbols per slot and numerology μ=2 with 4 slots per subframe. The slot duration is 0.25ms, the subcarrier interval is 60kHz, and the symbol duration is approximately 16.67μs. Within a set of frames, there may be one or more different bandwidth parts (BWPs) (see Figure 2B) that are frequency-division multiplexed. Each BWP may have a specific numerology.

[0034]

[0054] A resource grid may be used to represent the frame structure. Each time slot contains RBs (also called physical resource blocks (RBs) (PRBs)) that extend 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.

[0035]

[0055] As shown in Figure 2A, some of the REs carry reference (pilot) signals (RS) for the UE. RS may include demodulated RS (DM-RS) (shown as R for one particular configuration, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation in the UE. RS may also include beam measurement RS (BRS), beam refinement RS (BRRS), and phase tracking RS (PT-RS).

[0036]

[0056] Figure 2B shows an example of various DL channels within a subframe of a frame. A physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., one, two, four, eight, or sixteen CCEs), each CCE containing six RE groups (REGs), each REG containing twelve consecutive REs within the OFDM symbol of the RB. A PDCCH within a single BWP may be called a control resource set (CORESET). The UE is configured to monitor PDCCH candidates in the PDCCH search space (e.g., common search space, UE-specific search space) during PDCCH monitoring opportunities on the CORESET, where PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at higher and / or lower frequencies across the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of the frame. The PSS is used by the UE104 to determine subframe / symbol timing and physical layer identification information. The secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identification information group number and radio frame timing. Based on the physical layer identification information and physical layer cell identification information group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the DM-RS described above. The physical broadcast channel (PBCH) carrying the master information block (MIB) may be logically grouped using the PSS and SSS to form synchronization signal (SS) / PBCH blocks (also called SS blocks (SSB)). The MIB provides the number of RBs in the system bandwidth and the system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as the system information block (SIB), and paging messages.

[0037]

[0057] As shown in Figure 2C, some of the REs carry DM-RS for channel estimation at the base station (shown as R for one particular configuration, but other DM-RS configurations are possible). The UE may transmit DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink sharing channel (PUSCH). PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH. PUCCH DM-RS may be transmitted in different configurations depending on whether a short or long PUCCH is transmitted, and depending on the specific PUCCH format used. The UE may transmit a sounding reference signal (SRS). SRS may be transmitted in the last symbol of a subframe. SRS may have a comb structure, and the UE may transmit SRS on one of the combs. SRS may be used by the base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

[0038]

[0058] Figure 2D shows an example of various UL channels within a frame subframe. In one configuration, the PUCCH may be located as shown. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), and hybrid automatic retransmission request (HARQ) ACK / NACK feedback. The PUCCH may also carry data and may be used to carry buffer status reports (BSR), power headroom reports (PHR), and / or UCI.

[0039]

[0059] Figure 3 is a block diagram of a base station 310 communicating with UE350 in the access network. In DL, IP packets from EPC160 can be fed to the controller / processor 375. The controller / processor 375 implements Layer 3 and Layer 2 functions. Layer 3 includes the Radio Resource Control (RRC) layer, and Layer 2 includes the Service Data Adaptation Protocol (SDAP) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the Medium Access Control (MAC) layer. The controller / processor 375 includes RRC layer functions related to broadcasting system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functions related to header compression / decompression, security (encryption, decryption, integrity protection, integrity verification), and handover support functions; RLC layer functions related to forwarding upper layer packet data units (PDUs), error correction via ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), and MAC SDUs from TBs. It provides MAC layer functions related to SDU multiplexing, scheduling information reporting, error correction via HARQ, priority processing, and logical channel prioritization.

[0040]

[0060] The transmit (TX) processor 316 and the receive (RX) processor 370 implement Layer 1 functions related to various signal processing functions. Layer 1, including the physical (PHY) layer, may include error detection on the transport channel, forward error correction (FEC) coding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles mapping to signal constellations based on various modulation schemes (e.g., two-phase-shift keying (BPSK), four-phase-shift keying (QPSK), M-phase-shift keying (M-PSK), multi-level quadrature amplitude modulation (M-QAM)). Coded and modulated symbols can then be split into parallel streams. Each stream can then be mapped to an OFDM subcarrier to generate a physical channel that carries a time-domain OFDM symbol stream, multiplexed with a reference signal (e.g., a pilot) in the time-domain and / or frequency-domain, and then synthesized with each other using an inverse fast Fourier transform (IFFT). The OFDM streams are spatially precoded to generate multiple spatial streams. Channel estimates from the channel estimator 374 can be used to determine the coding and modulation scheme, as well as for spatial processing. Channel estimates can be derived from the reference signal and / or channel state feedback transmitted by the UE350. Each spatial stream can then be provided to different antennas 320 via a separate transmitter 318TX. Each transmitter 318TX can modulate RF carriers on its respective spatial stream for transmission.

[0041]

[0061] In UE350, each receiver 354RX receives signals through its respective antenna 352. Each receiver 354RX reconstructs the information modulated on the RF carrier and provides that information to the receiver (RX) processor 356. The TX processor 368 and RX processor 356 implement Layer 1 functions related to various signal processing functions. The RX processor 356 may perform spatial processing on the information to reconstruct any spatial stream destined for UE350. If multiple spatial streams are destined for UE350, they can be combined into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then uses a Fast Fourier Transform (FFT) to convert the OFDM symbol stream from the time domain to the frequency domain. The frequency domain signal has a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier and the reference signal are reconstructed and demodulated by determining the most likely signal constellation point transmitted by the base station 310. These soft decisions are obtained based on channel estimates calculated by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals initially transmitted by the base station 310 on the physical channel. The data and control signals are then provided to the controller / processor 359, which implements Layer 3 and Layer 2 functions.

[0042]

[0062] The controller / processor 359 may be associated with memory 360, which stores program code and data. Memory 360 is sometimes referred to as computer-readable media. In UL, the controller / processor 359 performs multiplex isolation between transport and logical channels, packet reassembly, decoding, header decompression, and control signal processing to reconstruct IP packets from the EPC160. The controller / processor 359 is also responsible for error detection using the ACK and / or NACK protocols to support HARQ operation.

[0043]

[0063] Similar to the functions described for DL ​​transmission by base station 310, the controller / processor 359 provides RRC layer functions related to system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functions related to header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functions related to the transfer 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 functions related to mapping between logical channels and transport channels, multiplexing MAC SDUs onto TB, multiplexing and deselecting MAC SDUs from TB, scheduling information reporting, error correction via HARQ, priority processing, and logical channel prioritization.

[0044]

[0064] The channel estimate derived by the channel estimator 358 from a reference signal or feedback transmitted by the base station 310 can be used by the TX processor 368 to select an appropriate coding and modulation scheme and to facilitate spatial processing. The spatial stream generated by the TX processor 368 can be supplied to different antennas 352 via a separate transmitter 354TX. Each transmitter 354TX can modulate the RF carrier in its respective spatial stream for transmission.

[0045]

[0065] UL transmission is processed at base station 310 in a manner similar to that described for receiver functions in UE350. Each receiver 318RX receives the signal via its respective antenna 320. Each receiver 318RX reconstructs the information modulated on the RF carrier and provides this information to RX processor 370.

[0046]

[0066] The controller / processor 375 may be associated with memory 376, which stores program code and data. Memory 376 is sometimes referred to as computer-readable media. In UL, the controller / processor 375 performs multiplex isolation between transport and logical channels, packet reassembly, decoding, header decompression, and control signal processing to reconstruct IP packets from the UE350. IP packets from the controller / processor 375 may be fed to the EPC160. The controller / processor 375 is also responsible for error detection using the ACK and / or NACK protocols to support HARQ operation.

[0047]

[0067] At least one of the TX processor 368, RX processor 356, and controller / processor 359 may be configured to implement an embodiment relating to the PRS / SRS process component 198 shown in Figure 1.

[0048]

[0068] At least one of the TX processor 316, RX processor 370, and controller / processor 375 may be configured to implement an embodiment relating to the PRS / SRS component 199 in Figure 1.

[0049]

[0069] The location of a UE may be estimated based on measuring a reference signal transmitted between the UE and one or more base stations and / or the transmit / receive points (TRPs) of one or more base stations. Figure 400 shows an example of UE positioning based on reference signal measurement. In one example, the location of UE 404 may be estimated based on multi-cell round-trip time (multi-RTT) measurements, where multiple base stations 402 may perform round-trip time (RTT) measurements for signals transmitted to and received by UE 404 to determine the approximate distance of UE 404 to each of the multiple base stations 402. Similarly, UE 404 may perform RTT measurements for signals transmitted to and received by each base station to determine the approximate distance of each base station to UE 404. Then, based at least in part on the approximate distances of UE 404 to the multiple base stations 402, a location management function (LMF) associated with base stations 402 and / or UE 404 may estimate the location of UE 404. For example, base station 406 may transmit at least one downlink positioning reference signal (DL-PRS) 410 to UE 404 and receive at least one uplink sounding reference signal (UL-SRS) 412 transmitted from UE 404. Based at least in part on measuring the round-trip time (RTT) 414 between the transmitted DL-PRS 410 and the received UL-SRS 412, base station 406 or an LMF associated with base station 406 may identify the location (e.g., distance) of UE 404 relative to base station 406. Similarly, UE 404 may transmit UL-SRS 412 to base station 406 and receive DL-PRS 410 transmitted from base station 406. Based at least in part on measuring the round-trip time (RTT) 414 between the transmitted UL-SRS 412 and the received DL-PRS 410, UE 404 or an LMF associated with UE 404 may identify the location of base station 406 relative to UE 404. The multi-RTT measurement mechanism can be initiated by an LMF associated with base stations 406 / 408 and / or UE404. The base station can configure UL-SRS resources to the UE via radio resource control (RRC) signaling.In some cases, the UE and the base station (or the base station's TRP) may report multi-RTT measurements to the LMF, which may then estimate the UE's location based on the reported multi-RTT measurements.

[0050]

[0070] In other examples, the UE's position may be estimated based on measurements of multiple antenna beams, where the downlink departure angle (DL-AoD) and / or uplink arrival angle (UL-AoA) of the transmission between the UE and one or more base stations / TRPs may be used to estimate the UE's position and / or distance to each base station / TRP. For example, referring again to Figure 4, with respect to DL-AoD, UE 404 may perform a measurement of reference signal received power (RSRP) for a set of DL-PRS 416 transmitted from multiple transmit beams (e.g., DL-PRS beams) of base station 408, and UE 404 may provide measurements of the DL-PRS beams to the serving base station (or LMF associated with the base station). Based on the DL-PRS beam measurements, the serving base station or LMF may derive the departure azimuth angle (e.g., Φ) and departure zenith angle (e.g., θ) for the DL-PRS beams of base station 408. Next, the serving base station or LMF may estimate the position of UE404 relative to base station 408 based on the departure azimuth and departure zenith angles of the DL-PRS beam. Similarly, in the case of UL-AoA, the position of the UE may be estimated based on measurements of the UL-SRS beam taken at different base stations, such as base station 402. Based on the UL-SRS beam measurements, the serving base station or an LMF associated with the serving base station may derive the azimuth angle of arrival and zenith angle of arrival for the UL-SRS beam from the UE, and the serving base station or LMF may estimate the position of the UE and / or the distance of the UE relative to each base station based on the arrival azimuth and zenith angles of the UL-SRS beam.

[0051]

[0071] Figure 5A is a representation of Figure 500A showing an example of a DL-PRS transmitted from multiple TRPs / base stations. In one example, a serving base station may configure a DL-PRS to be transmitted from one or more TRPs / base stations, either within a slot or across multiple slots. If the DL-PRS is configured to be transmitted within a slot, the serving base station may constitute the temporally and frequency-initiated resource element from each of the one or more TRPs / base stations. If the DL-PRS is configured to be transmitted across multiple slots, the serving base station may constitute the gaps between DL-PRS slots within a period, the period of the DL-PRS, and / or the density of the DL-PRS. A serving base station may also configure a DL-PRS to initiate in any physical resource block (PRB) within the system bandwidth. In one example, the system bandwidth may range from 24 to 276 PRBs in steps of four PRBs (e.g., 24, 28, 32, 36, etc.). A serving base station may transmit DL-PRS in a PRS beam, where the PRS beam may be referred to as a “PRS resource,” and the entire set of PRS beams transmitted from a TRP on the same frequency may be referred to as a “PRS resource set” or “PRS resource set,” as illustrated with respect to Figure 4. DL-PRS transmitted from different TRPs and / or different PRS beams may be multiplexed across symbols or slots, as shown by Figure 5A.

[0052]

[0072] In some cases, when more RTT and / or angle measurements (e.g., azimuth angle and zenith angle measurements) based on DL-PRS are collected (e.g., by LMF through the base station and / or UE), the accuracy of the UE's positioning may also increase. Since DL-PRS measurements can be collected per PRS resource, repeated transmissions of PRS resources from the TRP / base station can enable more DL-PRS measurements and / or continuous DL-PRS measurements at the UE. The serving base station can fill in the gaps between PRS resources (e.g.,

[0053]

number

[0054] ) configures the duration of the resource set (for example,

[0055]

number

[0056] The number of resource iterations within ) (for example,

[0057]

number

[0058] The amount and type of repetitions of PRS resources for the UE can be configured by using parameters that make up the ) for example. For example, a serving base station can configure DL-PRS resources to repetition up to 32 times within the duration of the resource set, either in consecutive slots or with configurable gaps between repetitions. The serving base station can also configure the duration of the resource set for the UE, which can range from 4 to 10240 milliseconds, through higher-layer parameters (e.g., the dl-PRS-Periodicity-and-ResourceSetSlotOffset-r16 parameter), for example.

[0059]

number

[0060] ) and from 0

[0061]

number

[0062] Possible slot offsets within the range (for example,

[0063]

number

[0064] ) can be configured. Based on the configuration, the number of DL-PRS measurements that the UE may be able to perform during a period or duration can be estimated. For example, with a subcarrier interval of 30 kHz, the minimum measurement instance period could be 8 slots, which could be equal to 4 milliseconds. If configured so that the minimum reporting period is 1 second (e.g., 1000 milliseconds), the UE may have up to 250 measurement instances (e.g., 1000 / 4) to perform DL-PRS measurements.

[0065]

[0073] In some cases, a base station may configure or request a UE to provide periodic location information reports. The base station may indicate to the UE the number of periodic location information reports requested by the base station (e.g., via the reportingAmount parameter), which could be 2, 4, 8, 16, 32, 64, 128, or an infinite / undetermined number of reports. If the base station requests the UE to provide an infinite / undetermined number of reports (e.g., reportingAmount=infinity / undetermined), the UE may continue to provide periodic location information reports until the base station notifies the UE to stop, for example by sending an abort message. The base station may also indicate to the UE the time interval between location information reports sent from the UE and the response time for the first location information report, where the time interval could be 1, 2, 4, 8, 10, 16, 20, 32, 64, and / or 128 seconds.

[0066]

[0074] Referring again to Figure 5A, each symbol of the DL-PRS can be configured in a frequency-comb structure, where the DL-PRS from the base station or TRP can occupy every Nth subcarrier. The comb value N can be configured to be 2, 4, 6, or 12. The length of the PRS in one slot can be a multiple of the N symbols, and the position of the first symbol in the slot can be flexible as long as the slot consists of at least N PRS symbols. Figure 500A is an example of a DL-PRS configuration of comb 6, where the pattern for DL-PRS from different TRPs / base stations can be repeated after the six symbols.

[0067]

[0075] Figure 5B is a diagram showing an example of UL-SRS transmitted from a UE. In one example, UL-SRS from a UE may consist of a comb 4 pattern, where the pattern for UL-SRS may be repeated after four symbols. Similarly, UL-SRS may be configured within an SRS resource set, where each SRS resource may correspond to an SRS beam, and the SRS resource set may correspond to a collection of SRS resources (e.g., beams) configured for a base station / TRP. In some examples, the SRS resource may span 1, 2, 4, 8, or 12 consecutive OFDM symbols. In other examples, the comb size for UL-SRS may be configured to be 2, 4, or 8.

[0068]

[0076] Figure 600 shows an example of estimating the location of a UE based on multi-RTT measurements from multiple base stations or TRPs. UE602 corresponds to a first base station (BS) 604, a second BS606, a third BS608, and a fourth BS610, and may be configured by a serving base station to decode DL-PRS resources 612 transmitted from there. UE602 may also be configured to transmit UL-SRS over a set of UL-SRS resources, which may include a first SRS resource 614, a second SRS resource 616, a third SRS resource 618, and a fourth SRS resource 620, so that serving cells, e.g., the first BS604, the second BS606, the third BS608, and the fourth BS610, as well as other neighbor cells, may be able to measure the set of UL-SRS resources transmitted from UE602. In the case of multi-RTT measurements based on DL-PRS and UL-SRS, there may be a correlation between the UE measurements for DL-PRS and the base station measurements for UL-SRS. Therefore, the smaller the gap between the DL-PRS measurements of the UE and the UL-SRS transmissions of the UE, the more accurate the estimation of the UE's position and / or distance to each BS may be.

[0069]

[0077] In some cases, due to the processing capabilities and / or configuration of the UE, the UE may not be able to measure one or more DL-PRS resources at the same time or within a configured duration. For example, different UEs may apply different strategies and / or mechanisms to measure DL-PRS resources. Thus, how a UE measures DL-PRS resources may depend on the implementation and may differ across different UEs. Since UL-SRS transmissions / resources may be pre-configured for the UE and not dynamically updated and / or changed for the UE, some UL-SRS transmissions may not be efficient / useful for estimating the UE's location based on multi-RTT measurements if the UE is unable to measure the corresponding DL-PRS in one or more measurement instances. For example, referring to Figure 6, UE602 may have the ability to measure one DL-PRS resource from one BS in one measurement instance. If 16 DL-PRS resources are transmitted from BS604, 606, 608, and 610 to UE602, UE602 may require 16 measurement instances to complete measurements for the 16 DL-PRS resources. In other words, while UE602 is measuring DL-PRS resources from one of the BSs, UE602 may not be able to measure DL-PRS resources from other BSs. If UE602 is unable to measure DL-PRS resources during one or more measurement instances, the corresponding UL-SRS transmitted from UE602 may not be efficient / useful for estimating the UE's location. Similarly, if a base station / BS or an LMF associated with a base station is unable to measure one or more UL-SRS resources simultaneously or during a configured duration, and the base station / BS is unable to measure the corresponding UL-SRS that the UE reports measurements for during one or more measurement instances, some DL-PRS transmissions may not be efficient / useful for estimating the UE's location.

[0070]

[0078] Embodiments presented herein may improve positioning based on multi-RTT measurements for a UE and a base station. Embodiments presented herein may enable the base station / LMF and the UE to communicate with each other to indicate one or more DL-PRS and / or UL-SRS resources that the UE and / or base station are measuring or have been prioritized to measure, so that the correct pair of DL-PRS / UL-SRS resources can be measured by the UE and / or base station to improve the performance and accuracy of positioning based on multi-RTT measurements.

[0071]

[0079] In one aspect of the present disclosure, if a DL-PRS measurement opportunity occurs before a UL-SRS transmission opportunity, the UE may be configured to provide the base station or a base station associated LMF with a list of DL-PRS resources that the UE intends to measure or is configured to measure and / or has measured during the measurement opportunity. In response to the list of PRS resources, the base station (or the base station's TRP) may measure the UL-SRS corresponding to the DL-PRS measured by the UE, so that measurements for DL-PRS and UL-SRS pairs can be completed during the measurement opportunity.

[0072]

[0080] Figure 7 shows a communication flow 700 illustrating an example of a UE communicating with a base station regarding a DL-PRS resource to be measured, according to an aspect of this disclosure. Optional aspects may be indicated by dashed lines.

[0073]

[0081] In 705, UE704 and / or base station 702 (or LMF associated with base station 702) may determine associations between PRS and SRS. For example, UE704 may determine associations between one or more receive properties of a PRS resource and one or more transmit properties of an SRS resource, and base station 702 may determine associations between one or more receive properties of an SRS resource and one or more transmit properties of an SRS resource.

[0074]

[0082] For example, one or more receive properties may be associated with at least one receive beam that UE704 can use to receive PRS in a PRS resource or that base station 702 can use to receive SRS in an SRS resource, and one or more transmit properties may be associated with at least one transmit beam that UE704 can use to transmit SRS in an SRS resource or that base station 702 can use to transmit PRS in a PRS resource, so that at least one receive beam and at least one transmit beam may have the same set of associated beam directions. For example, one or more receive properties in UE704 may indicate that if UE704 receives PRS using one or more receive beams in UE704, UE704 may transmit corresponding SRS using one or more transmit beams corresponding to one or more receive beams, so that one or more receive beams and one or more transmit beams may have the same set of associated beam directions. Similarly, one or more receiving properties at base station 705 may indicate that if base station 702 transmits a PRS using one or more transmit beams at base station 702, base station 702 may receive a corresponding SRS using one or more receive beams corresponding to one or more transmit beams, and thus one or more transmit beams and one or more receive beams may have the same set of associated beam directions.

[0075]

[0083] In another example, one or more receive properties may be associated with the reception power of the PRS / SRS, and one or more transmit properties may be associated with the transmission power of the SRS / PRS. For example, one or more receive properties may indicate that if UE 704 receives a PRS from base station 702 with a measured power (e.g., measured RSRP) below a threshold, UE 704 may increase the transmit power for the SRS. Similarly, if base station 702 receives an SRS from UE 704 with a measured power below a threshold, base station 702 may increase the transmit power for the PRS, and so on.

[0076]

[0084] In another example, one or more receive properties may be associated with the reception timing of the PRS / SRS, and one or more transmit properties may be associated with the transmit timing of the SRS / PRS. For example, one or more receive properties may indicate that if UE704 is not receiving a PRS from base station 702, UE704 may not transmit the corresponding SRS from base station 702, or that UE704 may apply a timing offset to the transmission of the SRS.

[0077]

[0085] In 706, UE704 may transmit information 708 to base station 702 indicating one or more PRS resources that UE704 is supposed to measure or is scheduled to measure (e.g., configured to measure) in UE704 (e.g., through at least one of the received beams in UE704). For example, as shown in 718, information 708 may indicate that, in a given measurement opportunity, UE704 is supposed to measure or is configured to measure DL-PRS resources 710, 712, and 714, and / or UE704 is measuring DL-PRS resource 716, etc. UE704 may autonomously determine one or more PRS resources from the set of PRS resources that UE704 is supposed to measure (or is configured to measure) without receiving input from base station 702. For example, UE704 may have previously measured a set of PRS resources from base station 702, and based at least in part on the previous measurement, UE704 may select a subset of PRS resources from the set of PRS resources as one or more PRS resources that UE704 is to measure in a given measurement opportunity.

[0078]

[0086] In one example, UE704 may transmit information 708 to the base station in a lower-layer message, such as uplink control information (UCI) and / or media access control (MAC) control element (CE) (MAC-CE). In another example, UE704 may transmit information 708 to the base station in a higher-layer message, such as via radio resource control (RRC) signaling. Base station 702 may forward information 708 to other base stations and / or TRPs associated with UE704's positioning session (for example, as shown in Figure 8). In one example, base station 702 may be a serving base station and may receive information 708 directly from UE704. In another example, base station 702 may not be a serving base station for UE704 and may receive information 708 indirectly from another base station, such as from at least one serving base station for UE704.

[0079]

[0087] In 720, base station 702 may transmit DL-PRS over one or more DL-PRS resources based on one or more transmit properties determined in 705. For example, base station 702 may transmit one or more DL-PRS using a specified set of transmit beams (for example, based on the beam previously used to receive UL-SRS in a previous measurement occasion), using a specified transmit power (for example, based on the received power of UL-SRS received in a previous measurement occasion), and / or using a specified transmission timing. One or more DL-PRS resources may include DL-PRS resources 710, 712, and 714.

[0080]

[0088] In 722, based on the transmitted information 708, UE 704 may measure DL-PRS received from base station 702 on DL-PRS resources based on one or more received properties determined in 705. For example, UE 704 may measure DL-PRS received on DL-PRS resources 710, 712, and 714 as indicated in information 708. In some examples, information 708 may be determined based on the capabilities of UE 704 (e.g., based on the capabilities of the UE), such as how many DL-PRS or the maximum number of DL-PRS that can be measured by UE 704 in a measurement opportunity. After UE 704 transmits information 708 to base station 702, UE 704 may prioritize its measurement for DL-PRS based at least in part on the transmitted information 708. For example, UE 704 may prioritize its measurement for DL-PRS received in DL-PRS resources 710, 712, and 714 as indicated in information 708.

[0081]

[0089] In 724, after UE704 has measured the DL-PRS transmitted from base station 702, UE704 may transmit one or more UL-SRS to base station 702 on a UL-SRS resource based on one or more transmit properties determined in 705. For example, UE704 may transmit one or more UL-SRS by using a specified set of transmit beams based on the receive beam used to receive the DL-PRS (e.g., beams having the same or related direction), using a specified transmit power based on the received power of the DL-PRS, and / or a specified transmit timing based on the received timing of the DL-PRS. The UL-SRS resources may include UL-SRS resources 726, 728, and 730 which may correspond to the DL-PRS resources 710, 712, and 714 that UE704 is measuring, as shown by UE704 in information 708. In some examples, at least one transmit / SRS beam and at least one receive beam (for example, the beam used by UE704 to receive the corresponding DL-PRS) may have the same set of associated beam directions. For example, if UE704 uses a first receive beam to receive DL-PRS transmitted over DL-PRS resource 710, UE704 may use a transmit / SRS beam with the same beam direction as the first receive beam to transmit UL-SRS using UL-SRS resource 726. Similarly, if UE704 uses a second receive beam to receive DL-PRS transmitted over DL-PRS resource 712, UE704 may use a transmit / SRS beam with the same beam direction as the second receive beam to transmit UL-SRS using UL-SRS resource 728, and so on.

[0082]

[0090] In 724, base station 702 may receive UL-SRS transmitted from UE 704 on a UL-SRS resource based on one or more receiving properties determined in 705, such as receiving UL-SRS using a designated receive beam. The UL-SRS resources may include UL-SRS resources 726, 728, and 730, which may correspond to DL-PRS resources 710, 712, and 714 transmitted by base station 702, respectively. In some examples, at least one transmit beam (e.g., a beam used to transmit DL-PRS) and at least one receive beam (e.g., a beam used to receive UL-SRS) may have the same set of associated beam directions. For example, if base station 702 uses a first transmit beam to transmit DL-PRS on DL-PRS resource 710, base station 702 may use a receive beam having the same beam direction as the first transmit beam to receive UL-SRS transmitted on UL-SRS resource 726. Similarly, if base station 702 uses a second transmit beam to transmit DL-PRS over DL-PRS resource 714, base station 702 may use a receive beam having the same beam direction as the second transmit beam to receive UL-SRS transmitted over UL-SRS resource 730.

[0083]

[0091] In 732, based on the received UL-SRS and information 708, base station 702 may measure the UL-SRS corresponding to the DL-PRS measured by UE 704, or prioritize the measurement of the UL-SRS, so that the correct pairs of UL-SRS and DL-PRS are measured and completed during one or more measurement opportunities. For example, if information 708 indicates that UE 704 is configured to measure or plans to measure DL-PRS transmitted on DL-PRS resources 710, 712, and 714, base station 702 may prioritize its measurement on the corresponding UL-SRS transmitted on UL-SRS resources 726, 728, and 730, respectively, so that multiple pairs of DL-PRS / UL-SRS measurements can be completed at base station 702 during a measurement opportunity.

[0084]

[0092] In 734, base station 702 or an LMF associated with base station 702 may determine the round-trip time (RTT) between the received UL-SRS and the transmitted DL-PRS, and base station 702 or the LMF may determine or estimate the position of UE 704 relative to base station 702 based at least in part on the determined RTT, as described with respect to Figure 4.

[0085]

[0093] In one example, information 708 may be transmitted before UE 704 measures the PRS received from base station 702 (for example, in 722). In such an example, UE 704 may determine that a quality metric for one or more PRS resources in information 708 exceeded a threshold in a previous measurement opportunity, and that information 708 may indicate one or more PRS resources having a quality metric that exceeds the threshold. For example, quality metrics may include RSRP, line of sight (LoS) probability, and / or timing delay calibration value. In other words, information 708, or the PRS resources that UE 704 is scheduled to measure or is configured to measure, may be determined at least in part based on one or more previous measurements. For example, UE 704 may determine that the PRS received through a set of PRS resources has the highest RSRP measurement, and UE 704 may include a set of PRS resources in information 708.

[0086]

[0094] In another example, UE704 may transmit information 708 indicating one or more PRS resources that UE704 plans to measure after the PRS received from base station 702 has been measured. In such an example, UE704 may determine quality metrics for one or more PRS resources in information 708. UE704 may then determine a subset of one or more PRS resources that have quality metrics exceeding a threshold, and thus information 708 may indicate a subset of one or more PRS resources that have quality metrics exceeding a threshold. Similarly, quality metrics may include at least one of RSRP, line-of-sight probability, or timing delay calibration value. For example, if UE704 receives a PRS from base station 702 before transmitting information 708, UE704 may measure the received PRS, and UE704 may select one or more PRS resources related to the measured PRS in information 708. In other words, UE704 may determine one or more PRS resources to be included in information 708 based on the RSRP, line-of-sight probability, or timing delay calibration value of the PRS received before transmitting information 708. In another example, UE704 may be configured to transmit information 708 within a configured duration of the PRS measurement (for example, before or after the PRS is measured). For example, UE704 may be configured to transmit information 708 within 5 ms after measuring the PRS received from base station 702.

[0087]

[0095] Figure 8 shows a communication flow 800 illustrating an example of a UE communicating with multiple base stations regarding a DL-PRS resource to be measured, according to an aspect of this disclosure. Optional aspects may be indicated by dashed lines.

[0088]

[0096] In 809, UE804 and / or serving base station 802 (or LMF associated with serving base station 802) may determine associations between PRS and SRS. For example, UE804 may determine associations between one or more receive properties of a PRS resource and one or more transmit properties of an SRS resource, and serving base station 802 may determine associations between one or more receive properties of an SRS resource and one or more transmit properties of an SRS resource.

[0089]

[0097] For example, one or more receive properties may be associated with at least one receive beam that UE804 can use to receive PRS in a PRS resource or that a serving base station 802 (or a non-serving base station) can use to receive SRS in an SRS resource, and one or more transmit properties may be associated with at least one transmit beam that UE804 can use to transmit SRS in an SRS resource or that a serving base station 802 (or a non-serving base station) can use to transmit PRS in a PRS resource, so that at least one receive beam and at least one transmit beam may have the same set of associated beam directions. For example, one or more receive properties in UE804 may indicate that if UE804 receives PRS using one or more receive beams in UE804, then UE804 may transmit SRS using one or more transmit beams corresponding to one or more receive beams, so that one or more receive beams and one or more transmit beams may have the same set of associated beam directions. Similarly, one or more receiving properties at the serving base station 802 may indicate that if the serving base station 802 transmits a PRS using one or more transmit beams at the serving base station 802, the serving base station 802 may receive an SRS using one or more receive beams corresponding to one or more transmit beams, and thus one or more transmit beams and one or more receive beams may have the same set of associated beam directions.

[0090]

[0098] In another example, one or more receive properties may be associated with the received power of a PRS / SRS, and one or more transmit properties may be associated with the transmitted power of an SRS / PRS. For example, one or more receive properties may indicate that if UE804 receives a PRS from serving base station 802 with measured power below a threshold (e.g., measured RSRP), UE804 may increase the transmitted power for the SRS. Similarly, if serving base station 802 (or another non-serving base station) receives an SRS from UE804 with measured power below a threshold, base station 802 (or another non-serving base station) may increase the transmitted power for the PRS, and so on.

[0091]

[0099] In another example, one or more receive properties may be associated with the receive timing of a PRS / SRS, and one or more transmit properties may be associated with the transmit timing of an SRS / PRS. For example, one or more receive properties may indicate that if UE804 is not receiving a PRS from serving base station 802 (or other non-serving base station), UE804 may not transmit an SRS corresponding to serving base station 802 (or other non-serving base station), or that UE804 may apply a timing offset to the transmission of an SRS.

[0092]

[0100] In 806, UE804 may transmit information 808 to the serving base station 802 or the LMF associated with the serving base station 802 through one of the base stations associated with UE804's positioning session. For example, UE804 may establish a positioning session with a first BS801, a second BS803, a third BS805, and a fourth BS807, where each BS can be a serving or non-serving base station for UE804. In one example, the serving base station 802 could be one of BS801, 803, 805, or 807 (for example, serving base station 802 could be the first BS801). In another example, serving base station 802 could be different from BS801, 803, 805, or 807. Communication between UE804 and the serving base station 802 or LMF may be forwarded to other non-serving base stations. For example, if the first BS801 is a serving base station for UE804 (for example, the first BS801 is serving base station 802), but the second BS803, the third BS805, and the fourth BS807 are not serving base stations for UE804, then UE804 may transmit information 808 to the first BS801 indicating one or more PRS resources that UE804 is supposed to measure, is planning to measure, or is currently measuring at UE804. The first BS801 may then forward the information 808 to the second BS803, the third BS805, and / or the fourth BS807.

[0093]

[0101] In one example, as shown in 818, information 808 may indicate that UE804 is intended to measure or is configured to measure DL-PRS810, 812, 814, and 816 transmitted from the first BS801, the second BS803, the third BS805, and the fourth BS807, respectively. The first BS801, the second BS803, the third BS805, and the fourth BS807 (collectively referred to as the “Related BS”) in Figure 8 may correspond to the first BS604, the second BS606, the third BS608, and the fourth BS610 in Figure 6. UE804 may transmit information 808 to the first BS801 in at least one of the UCI, MAC-CE, and / or RRC signaling. Next, in 809, the first BS801 or base station 802 may forward information 808 to other BS associated with the positioning session of UE804, such as the second BS803, the third BS805, and / or the fourth BS807. UE804 may autonomously determine one or more PRS resources from a set of PRS resources that UE804 is to measure (for example, configured to measure) without receiving input from the serving base station 802. For example, UE804 may have previously measured a set of PRS resources from one or more serving and / or non-serving base stations, and based at least in part on the measurement, UE804 may select a subset of PRS resources from the set of PRS resources as one or more PRS resources that UE804 is to measure.

[0094]

[0102] In 820, each of the first BS801, the second BS803, the third BS805, and the fourth BS807 may transmit one or more DL-PRS based on one or more transmit properties determined in 809. One or more transmit properties may include a specified set of transmit beams, a specified transmit power, and / or a specified transmit timing. For example, the first BS801 may transmit a set of DL-PRS including DL-PRS810 to UE804, the second BS803 may transmit a set of DL-PRS including DL-PRS812 to UE804, the third BS805 may transmit a set of DL-PRS including DL-PRS814 to UE804, the fourth BS807 may transmit a set of DL-PRS including DL-PRS816 to UE804, and so on. As shown in Figure 5A, DL-PRS transmitted from different BSs can be multiplexed together based on a comb pattern.

[0095]

[0103] In 822, based on the transmitted information 808, UE804 may measure (or prioritize its measurement of) DL-PRS received from the first BS801, second BS803, third BS805, and fourth BS807 on the DL-PRS resource based on one or more received properties determined in 705. In some examples, information 808 may be determined based on the capabilities of UE804, such as how many DL-PRS or the maximum number of DL-PRS that can be measured by UE804 in a measurement opportunity.

[0096]

[0104] In 824, after UE804 has measured the DL-PRS transmitted from the relevant BS, UE804 may transmit one or more UL-SRS to the relevant BS based on one or more transmit properties determined in 809. For example, UE804 may transmit one or more UL-SRS by using a specified set of transmit beams based on the receive beam used to receive the DL-PRS (e.g., beams having the same or related direction), using a specified transmit power based on the received power of the DL-PRS, and / or a specified transmit timing based on the received timing of the DL-PRS. One or more UL-SRS may include UL-SRS826, 828, 830, and 832 which may correspond to DL-PRS810, 812, 814, and 816 that UE804 may have measured, as shown by UE804 in Information 808. In some examples, at least one transmit / SRS beam and at least one receive beam (for example, the beam used by UE804 to receive the corresponding DL-PRS from one of the relevant BSs) may have the same set of related beam directions. For example, if UE804 uses a first receive beam to receive DL-PRS810 from a first BS801, UE804 may use a transmit / SRS beam with the same beam direction as the first receive beam to transmit UL-SRS826 corresponding to the first BS801. Similarly, if UE804 uses a second receive beam to receive DL-PRS812 from a second BS803, UE804 may use a transmit / SRS beam with the same beam direction as the second receive beam to transmit UL-SRS828 corresponding to the second BS803, and so on. Thus, in some examples, as shown by Figure 6, a UE may use different beams with different transmit / receive directions to communicate with different BSs and / or base stations that are in different directions relative to the UE.

[0097]

[0105] In 824, one or more of the associated BSs may receive UL-SRS transmitted from UE804 based on one or more receiving properties determined in 809, such as receiving UL-SRS using a specified receiving beam, receiving power, and / or timing. For example, a first BS801 may receive UL-SRS826 through at least one receiving beam in the first BS801, and a third BS805 may receive UL-SRS830 through at least one receiving beam in the third BS805, and so on. In some examples, the beam used by a BS to transmit DL-PRS and the beam used by a BS to receive the corresponding UL-SRS may have the same set of associated beam directions. For example, if a first BS801 uses a first transmitting beam to transmit DL-PRS810, the first BS801 may use a receiving beam with the same beam direction as the first transmitting beam to receive UL-SRS826. Similarly, if the fourth BS807 uses the second transmit beam to transmit DL-PRS816, the fourth BS807 may use a receive beam with the same beam direction as the second transmit beam to receive UL-SRS826, and so on.

[0098]

[0106] In 834, based on the received UL-SRS and information 808, the first BS801, the second BS803, the third BS805, and the fourth BS807 may measure the received UL-SRS or (as shown, for example, in information 808) may prioritize the measurement of the UL-SRS corresponding to the DL-PRS measured by UE804, so that the correct pair of DL-PRS / UL-SRS may be measured in one or more measurement opportunities or over a given duration. For example, if information 808 indicates that UE804 is configured to measure / is scheduled to measure DL-PRS810, 812, 814, and 816, then a first BS801 may prioritize its measurement for the corresponding UL-SRS826, a second BS803 may prioritize its measurement for the corresponding UL-SRS828, a third BS805 may prioritize its measurement for the corresponding UL-SRS830, a fourth BS807 may prioritize its measurement for the corresponding UL-SRS832, and so on.

[0099]

[0107] Based on the DL-PRS transmitted from the relevant BS and the UL-SRS received at the relevant BS, the serving base station 802 or the LMF associated with the serving base station 802 may calculate, collect, and / or derive the RTT between the received UL-SRS and the transmitted DL-PRS at each of the relevant BS, and the base station 802 or the LMF may determine or estimate the location or distance of the UE804 to each of the relevant BS, as described with respect to Figure 4.

[0100]

[0108] In one aspect of this disclosure, if an opportunity to measure a UL-SRS occurs before an opportunity to transmit a DL-PRS, the base station or a base station-related LMF may present the UE with a list of UL-SRS resources (or corresponding DL-PRS resources). For example, the list of UL-SRS resources (or corresponding DL-PRS resources) may be based on one or more UL-SRS received by the base station / TRP with a measurement (e.g., RSRP) that exceeds a threshold (e.g., in one or more previous measurement opportunities). In response to the list of UL-SRS resources (or corresponding DL-PRS resources), the UE may prioritize its measurement of the corresponding DL-PRS resource in one or more measurement opportunities, so that measurements for the correct pairs of DL-PRS and UL-SRS can be completed during one or more measurement opportunities.

[0101]

[0109] Figure 9 shows a communication flow 900, an example of a base station that, according to the mode of disclosure, provides the UE with a list of UL-SRSs to prioritize the measurement of the corresponding DL-PRS. Optional modes may be indicated by dashed lines.

[0102]

[0110] In 906, a serving base station 902 or an LMF associated with the serving base station 902 may transmit information 908 to the UE 904 indicating one or more SRS resources or one or more PRS resources corresponding to one or more SRS resources configured for transmission by the UE 904 (for example, based on one or more transmit properties). For example, as shown in 918, information 908 may be transmitted from one of the serving and / or non-serving base stations associated with the positioning session of the UE 904, where information 908 may indicate a list of UL-SRS or a list of DL-PRS corresponding to a list of UL-SRS on which the UE 904 may prioritize its measurement. In one example, a first BS 901 may transmit information 908 after an SRS has been measured within a configured duration for the measurement of the SRS. For example, the first BS 901 may be configured to transmit information 908 within 2 ms after the SRS has been measured.

[0103]

[0111] For example, as shown in 918, information 908 may include a list of UL-SRS resources (or a list of corresponding DL-PRS) that can be considered to have good or favorable measurements (e.g., channel quality), such as base station 902 having an RSRP measurement above a threshold (described in detail below). For example, in one or more previous UL-SRS transmission opportunities from UE904, the first BS901 of base station 902 may determine that the UL-SRS received on UL-SRS resource 910 has a better measurement at the first BS901 (e.g., having an RSRP measurement above a threshold), the second BS903 of base station 902 may determine that the UL-SRS received on UL-SRS resource 912 has a better measurement at the second BS903, the third BS905 of base station 902 may determine that the UL-SRS received on UL-SRS resource 914 has a better measurement at the third BS905, the fourth BS907 of base station 902 may determine that the UL-SRS received on UL-SRS resource 916 has a better measurement at the fourth BS907, and so on. In one example, serving base station 902 could be one of BS901, 903, 905, or 907 (for example, serving base station 902 could be the first BS901). In another example, serving base station 902 could be different from BS901, 903, 905, or 907. Communication between UE904 and serving base station 902 or LMF may be forwarded to other non-serving base stations. In another example, a base station may determine information 908 (e.g., a list of SRS resources) by determining a quality metric for one or more SRS resources, and determining a subset of SRS resources based on the SRS resources in the subset having a quality metric that exceeds a threshold, where the quality metric may include or be associated with at least one of the following: RSRP, LoS probability, or timing delay calibration value.In other words, the serving base station 902 may determine information 908 indicating a list of UL-SRS based on the RSRP, LoS probability, and / or timing delay calibration values ​​associated with the received SRS. The base station 902 may transmit information 908 to the UE through lower-layer messages such as downlink control information (DCI) and / or MAC-CE, as well as through higher-layer messages such as RRC signaling. In some cases, transmitting information 908 via RRC signaling may take more time, while transmitting information 908 via lower-layer messages may have lower latency, which may be more beneficial.

[0104]

[0112] In 920, UE904 may transmit UL-SRS over a set of UL-SRS resources from one or more transmit / SRS beams of UE904 based on one or more transmit properties in UE904, which may include UL-SRS resources 910, 912, 914, and 916. As shown in Figure 5B, the transmitted UL-SRS may consist of a comb pattern. In one example, UE904 may use different transmit beams, transmit power, and / or transmit timing to transmit UL-SRS over different UL-SRS resources. For example, UE904 may use a first transmit beam, transmit power, and / or transmit timing to transmit UL-SRS on UL-SRS resource 910, a second transmit beam, transmit power, and / or transmit timing to transmit UL-SRS on UL-SRS resource 912, a third transmit beam, transmit power, and / or transmit timing to transmit UL-SRS on UL-SRS resource 914, and a fourth transmit beam, transmit power, and / or transmit timing to transmit UL-SRS on UL-SRS resource 916.

[0105]

[0113] In 922, one or more of the first BS901, the second BS903, the third BS905, and the fourth BS907 (collectively referred to as the “related BS”) may receive UL-SRS transmitted from UE904 based on one or more receiving properties (for example, through at least one receiving beam in one or more BS, based on received power, and / or based on received timing). For example, the first BS901 may receive UL-SRS transmitted over UL-SRS resource 910 through at least one receiving beam in the first BS901, the third BS905 may receive UL-SRS transmitted over UL-SRS 914 through at least one receiving beam in the third BS905, and so on.

[0106]

[0114] In 924, one or more associated BSs may transmit corresponding DL-PRS based on one or more transmit properties associated with one or more receive properties in one or more BSs. For example, a first BS901 may transmit a DL-PRS to UE904 in a set of DL-PRS resources including DL-PRS resource 926, a second BS903 may transmit a DL-PRS to UE904 in a set of DL-PRS resources including DL-PRS resource 928, a third BS905 may transmit a DL-PRS to UE904 in a set of DL-PRS resources including DL-PRS resource 930, a fourth BS907 may transmit a DL-PRS to UE904 in a set of DL-PRS resources including DL-PRS resource 932, and so on. As shown in Figure 5A, DL-PRS transmitted from different BSs may be multiplexed with each other based on the comb pattern. In some examples, one or more beams used by a BS to receive UL-SRS from UE904 and one or more beams used by a BS to transmit DL-PRS to UE904 may have the same set of associated beam directions. For example, if a first BS901 uses a first receive beam to receive UL-SRS on UL-SRS resource 910, the first BS901 may use a transmit beam with the same beam direction as the first receive beam to transmit DL-PRS on DL-PRS resource 926. Similarly, if a fourth BS907 uses a second receive beam to receive UL-SRS on UL-SRS resource 910, the fourth BS907 may use a transmit beam with the same beam direction as the second receive beam to transmit DL-PRS on DL-PRS resource 932, and so on. In other examples, if a base station receives UL-SRS with received power below a threshold (e.g., RSRP), the base station may transmit a corresponding DL-PRS with increased power.

[0107]

[0115] In 925, based at least in part on information 908, UE 904 may prioritize its DL-PRS measurement for DL-PRS received from one or more of the relevant BS, where UE 904 may receive DL-PRS based on one or more received properties associated with one or more transmitted properties in the UE (e.g., Tx / Rx beam, Tx / Rx power, and / or Tx / Rx timing). For example, if information 908 indicates that UL-SRS received on UL-SRS resources 910, 912, 914, and 916 will be measured by UE 904 (e.g., as having better (e.g., higher quality) measurements), UE 904 may prioritize its DL-PRS measurement for DL-PRS corresponding to transmitted UL-SRS (e.g., DL-PRS transmitted on DL-PRS resources 926, 928, 930, and 932). For example, if UE904 also receives other DL-PRS unrelated to the UL-SRS resource indicated in information 908, and UE904 does not have the ability to measure them at the same time in the measurement opportunity, UE904 may decide to prioritize the measurement of its DL-PRS.

[0108]

[0116] Based on the UL-SRS transmitted from UE904 and the DL-PRS received by UE904, UE904 may determine the time difference between the transmission of the SRS and the reception of the PRS, and then UE904 may transmit information indicating the time difference in a measurement report to serving base station 902 or other serving base stations.

[0109]

[0117] The example shown in Figure 9 illustrates how UE904 prioritizes its measurement for DL-PRS received from the first BS901, the second BS903, the third BS905, and the fourth BS907, but the example is for illustrative purposes only. In some examples, where the measurement capabilities of UE904 are limited or reduced, UE904 may also prioritize its measurement among the first BS901, the second BS903, the third BS905, and / or the fourth BS907, such as measuring DL-PRS from different BSs in different measurement opportunities. For example, if UE904 is limited to measuring eight DL-PRS in a measurement instance, and each of the four BSs transmits at least eight DL-PRS to UE904 in each transmission instance, UE904 may be configured to measure eight DL-PRS from the first BS901 in the first measurement instance, eight DL-PRS from the second BS903 in the second measurement instance, eight DL-PRS from the third BS905 in the third measurement instance, and so on. In another example, UE904 may be configured to measure two DL-PRS from each of the four BSs in a measurement instance. In yet another example, UE904 may be configured to measure four DL-PRS from the first BS901 and four DL-PRS from the third BS905 in the first measurement instance, and four DL-PRS from the second BS903 and four DL-PRS from the fourth BS907 in the second measurement instance, and so on.

[0110]

[0118] As shown in 918, information 908 may indicate a list of UL-SRS resources (or a list of DL-PRS resources corresponding to a list of UL-SRS resources) that may be considered to have good or favorable measurements, such as base station 902 having an RSRP measurement above a threshold. Figure 10 is an example of a serving base station, Figure 1000, showing how the UE determines a list of UL-SRS resources that it may prioritize for its DL-PRS measurement based on a previous measurement instance. In one example, as shown in 1002, in a previous measurement instance (e.g., measurement instance 1), the UE (e.g., UE904) may be transmitting UL-SRS over a set of UL-SRS resources that are received by a first BS (e.g., BS1, first BS901), a second BS (e.g., BS2, second BS903), a third BS (e.g., BS3, third BS905), and a fourth BS (e.g., BS4, fourth BS907), which may or may not include the serving base station (e.g., serving base station 902). If each of the four BS measures the UL-SRS transmitted from the UE, and the Serving Base Station determines that the measured UL-SRS has a measurement above a threshold at each BS, the Serving Base Station may include the UL-SRS resources associated with the four BS (or their corresponding DL-PRS) in a list of UL-SRS resources that the UE can prioritize for its DL-PRS measurements (e.g., the list of UL-SRS resources in Information 908). Based on the list, the UE may continue to perform measurements with any of the four BS.

[0111]

[0119] In another example, as shown in 1004, if in a previous measurement instance (e.g., measurement instance 2) the first BS and the second BS have high-quality measurements (e.g., measurements above a threshold or the highest measurement among several BSs), and the third BS and the fourth BS do not have measurements above a threshold or have not received any UL-SRS transmitted from the UE, the serving base station may include the UL-SRS resources associated with the first BS and the second BS (or their corresponding DL-PRS) in a list of UL-SRS resources to which the UE can prioritize its DL-PRS measurements (e.g., a list of UL-SRS resources in information 908). Based on the list, the UE may focus / prioritize DL-PRS measurements for the resources of the first BS and the second BS, while DL-PRS measurements for the third BS and the fourth BS may be de-prioritized by the UE in the current measurement opportunity or prioritized in a later measurement opportunity.

[0112]

[0120] Similarly, as shown in 1006, if in a previous measurement instance (e.g., measurement instance 3) the first BS and the fourth BS have measurements above the threshold, and the second BS and the third BS do not have measurements above the threshold or have not received any UL-SRS transmitted from the UE, the serving base station may include the UL-SRS resources associated with the first BS and the fourth BS (or their corresponding DL-PRS) in a list of UL-SRS resources to which the UE may prioritize its DL-PRS measurements (e.g., the list of UL-SRS resources in information 908). Based on the list, the UE may focus / prioritize DL-PRS measurements for the resources of the first BS and the fourth BS, while DL-PRS measurements for the second BS and the third BS may be de-prioritized by the UE in the current measurement opportunity or prioritized in a later measurement opportunity. As shown in 1008, if in a previous measurement instance (e.g., measurement instance 4) the second BS and the fourth BS have measurements above the threshold, and the first BS and the third BS do not have measurements above the threshold or have not received any UL-SRS transmitted from the UE, the serving base station may include the UL-SRS resources associated with the second BS and the fourth BS (or their corresponding DL-PRS) in a list of UL-SRS resources to which the UE may prioritize its DL-PRS measurements (e.g., the list of UL-SRS resources in information 908). Based on the list, the UE may focus / prioritize DL-PRS measurements for the resources of the second BS and the fourth BS, while DL-PRS measurements for the first BS and the third BS may be de-prioritized by the UE in the current measurement opportunity or prioritized in a later measurement opportunity, and so on.

[0113]

[0121] Figure 11 is a flowchart 1100 of a wireless communication method. This method can be carried out by a UE or a component of a UE (for example, including UE 104, 350, 404, 602, 704, 804, device 1202, memory 360, and processing systems which may be the entire UE 350 or components of the UE 350 such as TX processor 368, RX processor 356, and / or controller / processor 359). Optional embodiments are shown by dashed lines. This method may enable the UE to provide the base station with a list of PRS resources that the UE intends to measure on a given occasion, where the PRS measurement opportunity may take place before an SRS transmission opportunity.

[0114]

[0122] In 1102, the UE may determine associations between one or more receiving properties of one or more PRS resources and one or more transmitting properties of one or more SRS resources, as described with reference to Figures 7 and 8. For example, in 705, the UE 704 may determine associations between receiving properties of a PRS and corresponding transmitting properties of an SRS. The determination of associations may be performed, for example, by the PRS-SRS association component 1240 of the device 1202 in Figure 12.

[0115]

[0123] In one example, as shown in 1110, one or more receive properties for PRS reception may be associated with at least one receive beam, and one or more transmit properties for SRS transmission may be associated with at least one transmit beam, where the at least one receive beam and the at least one transmit beam may have the same set of associated beam directions.

[0116]

[0124] In another example, as shown in 1112, one or more receive properties for PRS reception may be associated with receive power, and one or more transmit properties for SRS transmission may be associated with transmit power.

[0117]

[0125] In another example, as shown in 1114, one or more receive properties for PRS reception may be associated with receive timing, and one or more transmit properties for SRS transmission may be associated with transmit timing.

[0118]

[0126] In 1104, the UE may transmit information to at least one serving BS indicating one or more PRS resources that the UE is configured to measure at a future measurement opportunity, as described with respect to Figures 7 and 8. For example, in 706, the UE 704 may transmit information 708 to BS 702 indicating the PRS resources that will be measured by the UE 704. Transmission of information indicating one or more PRS resources may be carried out, for example, by the PRS resource display component 1242 and / or transmission component 1234 of the apparatus 1202 in Figure 12. In one example, the information may be transmitted via at least one of UCI, MAC-CE, or RRC signaling. The UE may autonomously determine one or more PRS resources from a set of PRS resources that the UE is configured to measure, where one or more PRS resources may be a subset of the set of PRS resources.

[0119]

[0127] In 1106, the UE may measure PRS received from one or more BS on one or more PRS resources based on one or more receiving properties, as described with reference to Figures 7 and 8. For example, in 722, the UE 704 may measure DL-PRS received from base station 702 on DL-PRS resources 710, 712, and 714 based on one or more receiving properties in the UE 704. PRS measurement may be performed, for example, by the PRS measurement component 1244 and / or receiving component 1230 of the device 1202 in Figure 12.

[0120]

[0128] In 1108, the UE may transmit an SRS to one or more BSs after measuring a PRS (and based on the associations determined in 1110, 1112, and 1114) based on one or more transmit properties on one or more SRS resources, as described with reference to Figures 7 and 8. For example, in 728, the UE 704 may transmit a UL-SRS on UL-SRS resources 726, 728, and 730 based on one or more transmit properties associated with one or more receive properties in the UE. For example, the UE 704 may transmit a UL-SRS through at least one transmit beam in the UE 704, where the beam used to transmit the UL-SRS and the beam used to receive the DL-PRS may have the same set of associated beam directions. Transmission of the SRS may be performed, for example, by the SRS transmit component 1246 and / or transmit component 1234 of the apparatus 1202 in Figure 12.

[0121]

[0129] In one example, one or more BS may include at least one serving BS. In another example, one or more BS may be different from at least one serving BS.

[0122]

[0130] In another example, information indicating one or more PRS resources may be transmitted before the PRS is measured and may indicate one or more PRS resources that the UE is configured to measure. In such an example, the UE may determine that a quality metric for one or more PRS resources exceeds a threshold in a previous measurement opportunity, where the information may indicate one or more PRS resources that have a quality metric that exceeds the threshold. In such an example, the quality metric may include at least one of RSRP, line-of-sight probability, or timing delay calibration value.

[0123]

[0131] In another example, information indicating one or more PRS resources may be transmitted after the PRS has been measured and may indicate a subset of one or more PRS resources measured by the UE. In such an example, the UE may determine quality metrics for one or more PRS resources and may determine a subset of one or more PRS resources that have quality metrics above a threshold, where the information may indicate a subset of one or more PRS resources that have quality metrics above a threshold. In such an example, the quality metrics may include at least one of RSRP, line-of-sight probability, or timing delay calibration value.

[0124]

[0132] In another example, information may be transmitted before or after the PRS is measured within the configured duration of the PRS measurement.

[0125]

[0133] Figure 12 is Figure 1200, which shows an example of a hardware implementation for device 1202. Device 1202 is a UE and includes a cellular baseband processor 1204 (also called a modem) coupled to a cellular RF transceiver 1222 and one or more subscriber identification module (SIM) cards 1220, an application processor 1206 coupled to a secure digital (SD) card 1208 and a screen 1210, a Bluetooth module 1212, a wireless local area network (WLAN) module 1214, a global positioning system (GPS) module 1216, and a power supply 1218. The cellular baseband processor 1204 communicates with UE 104 and / or BS 102 / 180 through the cellular RF transceiver 1222. The cellular baseband processor 1204 may include computer-readable media / memory. The computer-readable media / memory may be non-transient. The cellular baseband processor 1204 is responsible for general processing, including the execution of software stored in computer-readable media / memory. When the software is executed by the cellular baseband processor 1204, it causes the cellular baseband processor 1204 to perform the various functions described above. Computer-readable media / memory may also be used to store data that is manipulated by the cellular baseband processor 1204 when the software is executed. The cellular baseband processor 1204 further includes a receiving component 1230, a communication manager 1232, and a transmitting component 1234. The communication manager 1232 includes one or more illustrated components. The components within the communication manager 1232 may be stored in computer-readable media / memory and / or configured as hardware within the cellular baseband processor 1204. The cellular baseband processor 1204 may be a component of the UE350 and may include at least one of the memory 360 and / or TX processor 368, RX processor 356, and controller / processor 359.In one configuration, device 1202 is a modem chip and may include only a baseband processor 1204, while in another configuration, device 1202 is the entire UE (see, for example, 350 in Figure 3) and may include additional modules described earlier for device 1202.

[0126]

[0134] The communication manager 1232 includes, for example, a PRS-SRS association component 1240 configured to determine the association between one or more receive properties of one or more PRS resources and one or more transmit properties of one or more SRS resources, as described with respect to 1102 in Figure 11. The communication manager 1232 also includes a PRS resource display component 1242 configured to transmit to at least one serving BS information indicating one or more PRS resources that the UE is configured to measure on a future measurement opportunity, as described with respect to 1104 in Figure 11. The communication manager 1232 further includes a PRS measurement component 1244 configured to measure PRS received from one or more BS on one or more PRS resources based on one or more receive properties, as described with respect to 1106 in Figure 11. The communication manager 1232 further includes an SRS transmission component 1246 configured to transmit SRS on one or more SRS resources based on one or more transmit properties to one or more BS after measuring PRS, as described with respect to 1108 in Figure 11.

[0127]

[0135] The device may include additional components that implement each of the algorithm blocks in the flowchart of Figure 11 described above. Thus, each block in the flowchart of Figure 11 described above may be implemented by one component, and the device may include one or more of those components. A component may be one or more hardware components specifically configured to perform the described process / algorithm, implemented by a processor configured to perform the described process / algorithm, stored in a computer-readable medium for processor implementation, or any combination thereof.

[0128]

[0136] In one configuration, the device 1202, and in particular the cellular baseband processor 1204, includes means for determining associations between one or more receive properties of one or more PRS resources and one or more transmit properties of one or more SRS resources (e.g., a PRS-to-SRS association component 1240). The device 1202 includes means for transmitting to at least one serving BS information indicating one or more PRS resources configured for measurement by the UE in a future measurement opportunity (e.g., a PRS resource display component 1242 and / or a transmit component 1234). The device 1202 includes means for measuring PRS received from one or more BS on one or more PRS resources based on one or more receive properties (e.g., a PRS measurement component 1244 and / or a receive component 1230). The device 1202 includes means for transmitting SRS on one or more SRS resources based on one or more transmit properties to one or more BS after measuring the PRS (e.g., an SRS transmit component 1246 and / or a transmit component 1234). In one configuration, information may be transmitted via at least one of the following: UCI, MAC-CE, or RRC signaling.

[0129]

[0137] In one example, one or more receive properties for PRS reception may be associated with at least one receive beam, and one or more transmit properties for SRS transmission may be associated with at least one transmit beam, where the at least one receive beam and the at least one transmit beam may have the same set of associated beam directions.

[0130]

[0138] In another configuration, one or more receive properties for PRS reception may be associated with receive power, and one or more transmit properties for SRS transmission may be associated with transmit power.

[0131]

[0139] In another configuration, one or more receive properties for PRS reception may be associated with receive timing, and one or more transmit properties for SRS transmission may be associated with transmit timing.

[0132]

[0140] In an alternative configuration, the UE may autonomously determine one or more PRS resources that the UE is configured to measure from a set of PRS resources, where one or more PRS resources may be a subset of the set of PRS resources.

[0133]

[0141] In another configuration, one or more BS may include at least one serving BS, or one or more BS may be different from at least one serving BS.

[0134]

[0142] In another configuration, information indicating one or more PRS resources may be transmitted before the PRS is measured and may indicate one or more PRS resources that the UE is configured to measure. In such a configuration, the device 1202 includes means for determining that a quality metric for one or more PRS resources exceeds a threshold in a previous measurement opportunity, where the information may indicate one or more PRS resources having a quality metric that exceeds the threshold. In such a configuration, the quality metric may include at least one of RSRP, line-of-sight probability, or timing delay calibration value.

[0135]

[0143] In an alternative configuration, information indicating one or more PRS resources may be transmitted after the PRS has been measured and may indicate a subset of one or more PRS resources measured by the UE. In such a configuration, the device 1202 includes means for determining a quality metric for one or more PRS resources, and means for determining a subset of one or more PRS resources having a quality metric above a threshold, wherein the information may indicate a subset of one or more PRS resources having a quality metric above a threshold. In such a configuration, the quality metric may include at least one of RSRP, line-of-sight probability, or timing delay calibration value.

[0136]

[0144] In another configuration, the information may be transmitted before or after the PRS is measured within the configured duration of the PRS measurement.

[0137]

[0145] The means described above may be one or more of the components described above of the apparatus 1202 configured to perform the functions demonstrated by the means described above. As described above, the apparatus 1202 may include a TX processor 368, an RX processor 356, and a controller / processor 359. Thus, in one configuration, the means described above may be the TX processor 368, the RX processor 356, and the controller / processor 359, configured to perform the functions demonstrated by the means described above.

[0138]

[0146] Figure 13 is a flowchart 1300 of a wireless communication method. This method can be implemented by a base station or components of a base station (for example, including base stations 102, 180, 310, 702, 802, BS604, 606, 608, 610, 801, 803, 805, 807, device 1402, memory 376, and processing systems which may be the entire base station 310 or components of base station 310 such as TX processor 316, RX processor 370, and / or controller / processor 375). Optional embodiments are shown by dashed lines. This method may enable the base station to receive from the UE a list of PRS resources that the UE intends to measure on a given occasion, and thus the base station may measure the SRS corresponding to the PRS measured by the UE so that the correct pair of SRS / PRS is measured by the base station on the occasion.

[0139]

[0147] In 1302, the base station may receive information from the UE indicating one or more PRS resources that the UE is configured to measure or has measured in a single measurement opportunity, as described with reference to Figures 7 and 8. For example, in 706, the base station 702 may receive information 708 from the UE 704 indicating PRS resources that the UE 704 is scheduled to measure, is configured to measure, or has measured in a single measurement opportunity. Reception of the information may be carried out, for example, by the PRS resource display process component 1440 and / or receiving component 1430 of the device 1402 in Figure 14. The information may be received via at least one of UCI, MAC-CE, or RRC signaling.

[0140]

[0148] In 1304, the base station may transmit a PRS on one or more PRS resources indicated based on one or more transmit properties, as described with respect to Figures 7 and 8. For example, in 720, base station 702 may transmit a DL-PRS to UE 704 on DL-PRS resources 710, 712, and 714 based on information and one or more transmit properties at the base station. The transmission of the PRS may be performed, for example, by the PRS transmit component 1442 and / or transmit component 1434 of device 1402 in Figure 14.

[0141]

[0149] In 1306, a base station may, after transmitting a PRS, receive an SRS from a UE on one or more SRS resources based on one or more receiving properties associated with one or more transmitting properties, as described with reference to Figures 7 and 8. For example, in 724, base station 702 may receive an SRS from UE 704 on SRS resources 726, 728, and 730 based on one or more receiving properties associated with one or more transmitting properties in base station 702. For example, base station 702 may receive an SRS from UE 704 through at least one receiving beam in base station 702, where the beam used to transmit the DL-PRS and the beam used to receive the corresponding UL-SRS may have the same set of associated beam directions. Reception of the SRS may be performed, for example, by the SRS receiving components 1444 and / or 1430 of the device 1402 in Figure 14.

[0142]

[0150] In one example, as shown in 1310, one or more transmit properties for PRS transmission may be associated with at least one transmit beam, and one or more receive properties for SRS reception may be associated with at least one receive beam, where the at least one transmit beam and the at least one receive beam may have the same set of associated beam directions.

[0143]

[0151] In another example, as shown in 1312, one or more transmit properties for PRS transmission may be associated with transmit power, and one or more receive properties for SRS reception may be associated with receive power.

[0144]

[0152] In another example, as shown in 1314, one or more transmit properties for PRS transmission may be associated with transmit timing, and one or more receive properties for SRS reception may be associated with receive timing.

[0145]

[0153] In 1308, the base station may measure the received SRS on one or more SRS resources corresponding to one or more PRS resources shown, as described with reference to Figures 7 and 8. For example, in 732, the base station 702 may measure the UL-SRS received from UE 704 on SRS resources 726, 728, and 730. The SRS measurement may be performed, for example, by the SRS measurement component 1446 of the device 1402 in Figure 14.

[0146]

[0154] In one example, a base station may determine at least one RTT associated with the transmitted PRS and the measured SRS.

[0147]

[0155] In one example, a base station may send received information indicating one or more PRS resources to at least one other BS. In another example, information indicating one or more PRS resources may be received from a UE via at least one other BS.

[0148]

[0156] For example, information indicating one or more PRS resources may be received before the PRS is sent, or information indicating one or more PRS resources may be received after the PRS has been sent.

[0149]

[0157] In another example, information may be received before or after the PRS is transmitted, within the configured duration of the PRS transmission.

[0150]

[0158] Figure 14 is Figure 1400, which shows an example of a hardware implementation configuration for device 1402. Device 1402 is a BS and includes a baseband unit 1404. The baseband unit 1404 can communicate with UE 104 through a cellular RF transceiver. The baseband unit 1404 may include computer-readable media / memory. The baseband unit 1404 is responsible for general processing, including the execution of software stored in the computer-readable media / memory. When the software is executed by the baseband unit 1404, it causes the baseband unit 1404 to perform the various functions described above. The computer-readable media / memory may also be used to store data that is manipulated by the baseband unit 1404 when the software is executed. The baseband unit 1404 further includes a receiving component 1430, a communication manager 1432, and a transmitting component 1434. The communication manager 1432 includes one or more illustrated components. The components within the communications manager 1432 may be stored in a computer-readable medium / memory and / or configured as hardware within the baseband unit 1404. The baseband unit 1404 may be a component of the BS310 and may include memory 376 and / or at least one of TX processor 316, RX processor 370, and controller / processor 375.

[0151]

[0159] The communication manager 1432 includes, for example, a PRS resource display process component 1440 configured to receive information from the UE indicating one or more PRS resources that the UE is configured to measure or has measured in a single measurement opportunity, as described with respect to 1302 in Figure 13. The communication manager 1432 further includes, for example, a PRS transmit component 1442 configured to transmit a PRS on one or more PRS resources indicated based on one or more transmit properties, as described with respect to 1304 in Figure 13. The communication manager 1432 further includes, for example, an SRS receive component 1444 configured to receive an SRS from the UE after transmitting a PRS on one or more SRS resources based on one or more receive properties associated with one or more transmit properties, as described with respect to 1306 in Figure 13. The communication manager 1432 further includes, for example, an SRS measure component 1446 configured to measure the received SRS on one or more SRS resources corresponding to one or more indicated PRS resources, as described with respect to 1308 in Figure 13.

[0152]

[0160] The apparatus may include additional components that implement each of the blocks of the algorithm in the flowchart described above in Figure 13. Thus, each block in the flowchart described above in Figure 13 may be implemented by one component, and the apparatus may include one or more of those components. A component may be one or more hardware components specifically configured to perform the described process / algorithm, implemented by a processor configured to perform the described process / algorithm, stored in a computer-readable medium for processor implementation, or any combination thereof.

[0153]

[0161] In one configuration, the device 1402, and in particular the baseband unit 1404, includes means for receiving information from the UE indicating one or more PRS resources that the UE is configured to measure or has measured in a single measurement opportunity (e.g., a PRS resource display process component 1440 and / or a receiving component 1430). The device 1402 includes means for transmitting PRS over one or more PRS resources indicated based on one or more transmit properties (e.g., a PRS transmit component 1442 and / or a transmit component 1434). After transmitting PRS, the device 1402 includes means for receiving SRS from the UE over one or more SRS resources based on one or more receive properties associated with one or more transmit properties (e.g., an SRS receive component 1444 and / or a receiving component 1430). The device 1402 includes means for measuring the received SRS on one or more SRS resources corresponding to one or more indicated PRS resources (e.g., an SRS measurement component 1446). Information may be received via at least one of the following: UCI, MAC-CE, or RRC signaling.

[0154]

[0162] In one configuration, one or more transmit properties for PRS transmission may be associated with at least one transmit beam, and one or more receive properties for SRS reception may be associated with at least one receive beam, where the at least one transmit beam and the at least one receive beam may have the same set of associated beam directions.

[0155]

[0163] In another configuration, one or more transmit properties for PRS transmission may be associated with transmit power, and one or more receive properties for SRS reception may be associated with receive power.

[0156]

[0164] In another configuration, one or more transmit properties for PRS transmission may be associated with transmit timing, and one or more receive properties for SRS reception may be associated with receive timing.

[0157]

[0165] In another configuration, the base station may determine at least one RTT associated with the transmitted PRS and the measured SRS.

[0158]

[0166] In another configuration, the base station may send received information indicating one or more PRS resources to at least one other BS. In yet another configuration, information indicating one or more PRS resources may be received from the UE via at least one other BS.

[0159]

[0167] In another configuration, information indicating one or more PRS resources may be received before the PRS is sent, or information indicating one or more PRS resources may be received after the PRS has been sent.

[0160]

[0168] In another configuration, information may be received before or after the PRS is transmitted, within the configured duration of the PRS transmission.

[0161]

[0169] The means described above may be one or more of the components described above of the apparatus 1402 configured to perform the functions demonstrated by the means described above. As described above, the apparatus 1402 may include a TX processor 316, an RX processor 370, and a controller / processor 375. Thus, in one configuration, the means described above may be a TX processor 316, an RX processor 370, and a controller / processor 375 configured to perform the functions demonstrated by the means described above.

[0162]

[0170] Figure 15 is a flowchart 1500 of a wireless communication method. This method can be implemented by a UE or a component of a UE (for example, including UE104, 350, 404, 602, 904, device 1602, memory 360, and processing systems which may be the entire UE350 or components of the UE350 such as TX processor 368, RX processor 356, and / or controller / processor 359). Optional embodiments are shown by dashed lines. This method may enable the UE to receive from a base station a list on which the UE can prioritize the measurement of its PRS based at least in part on a list of SRS resources.

[0163]

[0171] In 1502, the UE may receive information from at least one serving BS indicating one or more SRS resources or one or more PRS resources corresponding to one or more SRS resources, as described with respect to Figure 9, where one or more SRS resources are associated with one or more transmit properties. For example, in 906, the UE 904 may receive information 908 from the base station 902 indicating a list of UL-SRS resources that the UE 904 transmits or can be configured to transmit (or a list of DL-PRS resources corresponding to a list of UL-SRS resources), where the list of UL-SRS resources may be associated with one or more transmit properties in the UE. Receiving information indicating SRS resources may be performed, for example, by the SRS resource display process component 1640 and / or receiving component 1630 of the device 1602 in Figure 16. In one example, the information may be received via at least one of DCI, MAC-CE, or RRC signaling.

[0164]

[0172] In 1504, the UE may transmit an SRS to one or more BSs based on one or more transmit properties, as described with respect to Figure 9, the SRS being transmitted on one or more indicated SRS resources or on one or more SRS resources corresponding to one or more indicated PRS resources. For example, in 920, the UE 904 may transmit an SRS to a first BS 901, a second BS 903, a third BS 905, and a fourth BS 907 based on one or more transmit properties in the UE. The transmission of the SRS may be performed, for example, by the SRS transmit component 1642 and / or transmit component 1634 of the device 1602 in Figure 16.

[0165]

[0173] In 1506, the UE may, after transmitting an SRS, prioritize measuring PRS received from at least one BS on one or more PRS resources in a single measurement opportunity, as described with respect to Figure 9, where the PRS are received based on one or more receiving properties associated with one or more transmitting properties. For example, in 925, the UE 904 may prioritize measuring DL-PRS transmitted from a first BS 901, a second BS 903, a third BS 905, and a fourth BS 907, where the UE 904 may receive DL-PRS based on one or more receiving properties associated with one or more transmitting properties. The measurement of the PRS may be performed, for example, by the PRS measurement component 1644 and / or receiving component 1630 of the apparatus 1602 in Figure 16.

[0166]

[0174] In one example, as shown in 1508, one or more transmit properties for SRS transmission may be associated with at least one transmit beam, and one or more receive properties for PRS reception may be associated with at least one receive beam, where the at least one receive beam and the at least one transmit beam may have the same set of associated beam directions.

[0167]

[0175] In another example, as shown in 1510, one or more transmit properties for SRS transmission may be associated with transmit power, and one or more receive properties for PRS reception may be associated with receive power.

[0168]

[0176] In another example, as shown in 1512, one or more transmit properties for SRS transmission may be associated with transmit timing, and one or more receive properties for PRS reception may be associated with receive timing.

[0169]

[0177] In another example, the UE may determine the time difference between the transmission of the SRS and the reception of the PRS, and the UE may send information indicating the time difference in the measurement report to at least one serving BS.

[0170]

[0178] In another example, one or more BS may include at least one serving BS, or one or more BS may be different from at least one serving BS.

[0171]

[0179] Figure 16 is Figure 1600, which shows an example of a hardware implementation for device 1602. Device 1602 is a UE and includes a cellular baseband processor 1604 (also called a modem) coupled to a cellular RF transceiver 1622 and one or more subscriber identification module (SIM) cards 1620, an application processor 1606 coupled to a secure digital (SD) card 1608 and a screen 1610, a Bluetooth module 1612, a wireless local area network (WLAN) module 1614, a global positioning system (GPS) module 1616, and a power supply 1618. The cellular baseband processor 1604 communicates with UE 104 and / or BS 102 / 180 through the cellular RF transceiver 1622. The cellular baseband processor 1604 may include computer-readable media / memory. The computer-readable media / memory may be non-transient. The cellular baseband processor 1604 is responsible for general processing, including the execution of software stored in computer-readable media / memory. When the software is executed by the cellular baseband processor 1604, it causes the cellular baseband processor 1604 to perform the various functions described above. Computer-readable media / memory may also be used to store data that is manipulated by the cellular baseband processor 1604 when the software is executed. The cellular baseband processor 1604 further includes a receiving component 1630, a communications manager 1632, and a transmitting component 1634. The communications manager 1632 includes one or more illustrated components. The components within the communications manager 1632 may be stored in computer-readable media / memory and / or configured as hardware within the cellular baseband processor 1604. The cellular baseband processor 1604 may be a component of the UE350 and may include at least one of the memory 360 and / or TX processor 368, RX processor 356, and controller / processor 359.In one configuration, device 1602 is a modem chip and may include only a baseband processor 1604, while in another configuration, device 1602 is the entire UE (see, for example, 350 in Figure 3) and may include additional modules described earlier for device 1602.

[0172]

[0180] The communication manager 1632 includes an SRS resource display process component 1640 configured to receive information from at least one serving BS indicating one or more SRS resources or one or more PRS resources corresponding to one or more SRS resources, as described, for example, with respect to 1502 in Figure 15, where one or more SRS resources are associated with one or more transmit properties. The communication manager 1632 further includes an SRS transmit component 1642 configured to transmit SRS to one or more BS based on one or more transmit properties, as described, for example, with respect to 1504 in Figure 15, where the SRS is transmitted over the indicated one or more SRS resources or over one or more SRS resources corresponding to the indicated one or more PRS resources. The communications manager 1632 further includes a PRS measurement component 1644 configured to prioritize measuring PRS received from at least one BS on one or more PRS resources in a single measurement opportunity after transmitting an SRS, as described with respect to 1506 in Figure 15, where the PRS is received based on one or more receiving properties associated with one or more transmitting properties.

[0173]

[0181] The device may include additional components that perform each of the algorithm blocks in the flowchart described above in Figure 15. Thus, each block in the flowchart described above in Figure 15 may be performed by one component, and the device may include one or more of those components. A component may be one or more hardware components specifically configured to perform the described process / algorithm, implemented by a processor configured to perform the described process / algorithm, stored in a computer-readable medium for processor implementation, or any combination thereof.

[0174]

[0182] In one configuration, the device 1602, and in particular the cellular baseband processor 1604, includes means (e.g., SRS resource display process component 1640 and / or receiving component 1630) for receiving information from at least one serving BS indicating one or more SRS resources or one or more PRS resources corresponding to one or more SRS resources, one or more SRS resources being associated with one or more transmit properties. The device 1602 also includes means (e.g., SRS transmit component 1642 and / or transmit component 1634) for transmitting SRS to one or more BS based on one or more transmit properties, the SRS being transmitted over the indicated one or more SRS resources or over one or more SRS resources corresponding to the indicated one or more PRS resources. The device 1602 includes means (e.g., PRS measurement component 1644 and / or receiving component 1630) for prioritizing the measurement of PRS received from at least one BS on one or more PRS resources in a single measurement opportunity after transmitting an SRS, wherein the PRS is received based on one or more receiving properties associated with one or more transmitting properties. In one configuration, information may be received via at least one of DCI, MAC-CE, or RRC signaling.

[0175]

[0183] In one configuration, one or more transmit properties for SRS transmission may be associated with at least one transmit beam, and one or more receive properties for PRS reception may be associated with at least one receive beam, where the at least one receive beam and the at least one transmit beam may have the same set of associated beam directions.

[0176]

[0184] In another configuration, one or more transmit properties for SRS transmission may be associated with transmit power, and one or more receive properties for PRS reception may be associated with receive power.

[0177]

[0185] In another configuration, one or more transmit properties for SRS transmission may be associated with transmit timing, and one or more receive properties for PRS reception may be associated with receive timing.

[0178]

[0186] In another configuration, the device 1602 includes means for determining the time difference between the transmission of an SRS and the reception of a PRS, and means for transmitting information indicating the time difference in the measurement report to at least one serving BS.

[0179]

[0187] In another configuration, one or more BS may include at least one serving BS, or one or more BS may be different from at least one serving BS.

[0180]

[0188] The means described above may be one or more of the components described above of the apparatus 1602 configured to perform the functions demonstrated by the means described above. As described above, the apparatus 1602 may include a TX processor 368, an RX processor 356, and a controller / processor 359. Thus, in one configuration, the means described above may be the TX processor 368, the RX processor 356, and the controller / processor 359, configured to perform the functions demonstrated by the means described above.

[0181]

[0189] Figure 17 is a flowchart 1700 of a wireless communication method. This method can be implemented by a base station or components of a base station (for example, including base stations 102, 180, 310, 902, BS604, 606, 608, 610, 901, 903, 905, 907, device 1802, memory 376, and processing systems which may be components of base station 310 such as the entire base station 310 or the TX processor 316, RX processor 370, and / or controller / processor 375). Optional embodiments are shown by dashed lines. This method may enable the base station to present the UE with a list on which the UE can prioritize its PRS measurement based at least partially on a list of SRS resources.

[0182]

[0190] In 1702, the base station may measure the SRS received from the UE on one or more SRS resources during a measurement opportunity, as described with respect to Figure 9. For example, in 922, the base station 902 may measure the SRS received from the UE 904 on SRS resources 910, 912, 914, and 916. The measurement of the SRS may be performed, for example, by the SRS measurement component 1840 and / or receiving component 1830 of the device 1802 in Figure 18.

[0183]

[0191] In 1704, the base station may determine a subset of one or more SRS resources, as described with respect to Figure 9, where the subset of SRS resources corresponds to one or more receiving properties in the BS. For example, in 906, the base station 902 may determine a list of SRS resources that the UE 904 may prioritize for measurement, where the list of SRS resources may correspond to one or more receiving properties in the BS. The determination of a subset of SRS resources may be performed, for example, by the SRS resource selection component 1842 of the device 1802 in Figure 18.

[0184]

[0192] In one example, when determining a subset of SRS resources, a base station may determine quality metrics for one or more SRS resources, and the base station may determine a subset of SRS resources based on the SRS resources in the subset that have quality metrics exceeding a threshold. In such an example, the quality metrics may include at least one of RSRP, line-of-sight probability, or timing delay calibration value.

[0185]

[0193] In 1706, the base station may transmit a PRS to the UE on one or more PRS resources based on one or more transmit properties in the BS, where one or more PRS resources correspond to a determined subset of SRS resources, and one or more transmit properties are associated with one or more receive properties. For example, in 924, the first BS901, the second BS903, the third BS905, and the fourth BS907 may transmit a DL-PRS on PRS resources 926, 928, 930, and 932 based on one or more transmit properties associated with one or more receive properties. For example, the first BS901 may transmit a DL-PRS through at least one transmit beam in the first BS901, where at least one transmit beam may have the same set of associated beam directions as at least one receive beam for receiving the corresponding SRS. PRS transmission may be performed, for example, by the PRS transmission component 1844 and / or transmission component 1834 of the device 1802 in Figure 18.

[0186]

[0194] In one example, as shown in 1708, one or more receiving properties for SRS reception may be associated with at least one receiving beam, and one or more transmitting properties for PRS transmission may be associated with at least one transmitting beam, where the at least one transmitting beam and the at least one receiving beam may have the same set of associated beam directions.

[0187]

[0195] In another example, as shown in 1710, one or more receive properties for SRS reception may be associated with receive power, and one or more transmit properties for PRS transmission may be associated with transmit power.

[0188]

[0196] In another example, as shown in 1712, one or more receive properties for SRS reception may be associated with receive timing, and one or more transmit properties for PRS transmission may be associated with transmit timing.

[0189]

[0197] In another example, the base station may transmit information to the UE indicating a subset of SRS resources or one or more PRS resources corresponding to a subset of SRS resources. In such an example, the information may be transmitted via at least one of DCI, MAC-CE, or RRC signaling. In such an example, the information may be transmitted after the SRS has been measured within the configured duration of the SRS measurement.

[0190]

[0198] Figure 18 is Figure 1800, which shows an example of a hardware implementation for device 1802. Device 1802 is a BS and includes a baseband unit 1804. The baseband unit 1804 can communicate with UE 104 through a cellular RF transceiver. The baseband unit 1804 may include computer-readable media / memory. The baseband unit 1804 is responsible for general processing, including the execution of software stored in the computer-readable media / memory. When the software is executed by the baseband unit 1804, it causes the baseband unit 1804 to perform the various functions described above. The computer-readable media / memory may also be used to store data that is manipulated by the baseband unit 1804 when the software is executed. The baseband unit 1804 further includes a receiving component 1830, a communication manager 1832, and a transmitting component 1834. The communication manager 1832 includes one or more illustrated components. The components within the communications manager 1832 may be stored in a computer-readable medium / memory and / or configured as hardware within the baseband unit 1804. The baseband unit 1804 may be a component of BS310 and may include memory 376 and / or at least one of TX processor 316, RX processor 370, and controller / processor 375.

[0191]

[0199] The communication manager 1832 includes, for example, an SRS measurement component 1840 configured to measure SRS received from the UE on one or more SRS resources in a measurement opportunity, as described with respect to 1702 in Figure 17. The communication manager 1832 further includes an SRS resource selection component 1842 configured to determine a subset of SRS resources of one or more SRS resources, the subset of SRS resources corresponding to one or more receiving properties in the BS, as described with respect to 1704 in Figure 17. The communication manager 1832 further includes a PRS transmission component 1844 configured to transmit PRS to the UE on one or more PRS resources based on one or more transmitting properties in the BS, the one or more PRS resources corresponding to the determined subset of SRS resources, the one or more transmitting properties associated with one or more receiving properties, as described with respect to 1706 in Figure 17.

[0192]

[0200] The device may include additional components that perform each of the algorithm blocks in the flowchart described above in Figure 17. Thus, each block in the flowchart described above in Figure 17 may be performed by one component, and the device may include one or more of those components. A component may be one or more hardware components specifically configured to perform the described process / algorithm, implemented by a processor configured to perform the described process / algorithm, stored in a computer-readable medium for processor implementation, or any combination thereof.

[0193]

[0201] In one configuration, the device 1802, and in particular the baseband unit 1804, includes means for measuring SRS received from the UE on one or more SRS resources during a measurement opportunity (e.g., SRS measurement component 1840 and / or receiving component 1830). The device 1802 includes means for determining a subset of SRS resources of one or more SRS resources, the subset of SRS resources corresponding to one or more receiving properties in the BS (e.g., SRS resource selection component 1842). The device 1802 includes means for transmitting PRS to the UE on one or more PRS resources based on one or more transmitting properties in the BS (e.g., PRS transmission component 1844 and / or transmission component 1834).

[0194]

[0202] In one configuration, when determining a subset of SRS resources, the device 1802 includes means for determining a quality metric for one or more SRS resources, and means for determining a subset of SRS resources based on SRS resources in the subset having a quality metric that exceeds a threshold. In such a configuration, the quality metric may include at least one of RSRP, line-of-sight probability, or timing delay calibration value.

[0195]

[0203] In another configuration, one or more receive properties for SRS reception may be associated with at least one receive beam, and one or more transmit properties for PRS transmission may be associated with at least one transmit beam, where the at least one transmit beam and the at least one receive beam may have the same set of associated beam directions.

[0196]

[0204] In another configuration, one or more receive properties for SRS reception may be associated with receive power, and one or more transmit properties for PRS transmission may be associated with transmit power.

[0197]

[0205] In another configuration, one or more receive properties for SRS reception may be associated with receive timing, and one or more transmit properties for PRS transmission may be associated with transmit timing.

[0198]

[0206] In another configuration, the device 1802 includes means for transmitting to the UE information indicating a subset of SRS resources or one or more PRS resources corresponding to a subset of SRS resources. In such a configuration, the information may be transmitted via at least one of DCI, MAC-CE, or RRC signaling. In such a configuration, the information may be transmitted after the SRS has been measured within a configured duration of the SRS measurement.

[0199]

[0207] The means described above may be one or more of the components described above of the apparatus 1802 configured to perform the functions demonstrated by the means described above. As described above, the apparatus 1802 may include a TX processor 316, an RX processor 370, and a controller / processor 375. Thus, in one configuration, the means described above may be a TX processor 316, an RX processor 370, and a controller / processor 375 configured to perform the functions demonstrated by the means described above.

[0200]

[0208] The following examples described in the additional embodiments are illustrative and not limiting, but they may be combined with other embodiments or teachings described herein.

[0201]

[0209] Embodiment 1 is an apparatus for wireless communication in a UE, comprising a memory, a transceiver, and a processor communicatively coupled to the memory and the transceiver, wherein the processor is configured to determine associations between one or more receive properties of one or more PRS resources and one or more transmit properties of one or more SRS resources, transmit to at least one serving BS information indicating one or more PRS resources configured for the UE to measure on a future measurement opportunity, measure PRS received from one or more BS on one or more PRS resources based on one or more receive properties, and transmit SRS on one or more SRS resources based on one or more transmit properties to one or more BS after measuring the PRS.

[0202]

[0210] In Embodiment 2, the apparatus of Embodiment 1 further includes that one or more receiving properties for PRS reception are associated with at least one receiving beam, and one or more transmitting properties for SRS transmission are associated with at least one transmitting beam, and that the at least one receiving beam and the at least one transmitting beam have the same set of associated beam directions.

[0203]

[0211] In Embodiment 3, the apparatus of Embodiment 1 or Embodiment 2 further includes that one or more receiving properties for receiving a PRS are associated with a receiving power, and one or more transmitting properties for transmitting an SRS are associated with a transmitting power.

[0204]

[0212] In Embodiment 4, any of the devices in Embodiments 1 to 3 further includes that one or more receiving properties for receiving PRS are associated with receiving timing, and one or more transmitting properties for transmitting SRS are associated with transmitting timing.

[0205]

[0213] In Embodiment 5, the device according to any of Embodiments 1 to 4 further includes the fact that the information is transmitted via at least one of UCI, MAC-CE, or RRC signaling.

[0206]

[0214] In embodiment 6, the apparatus of any of embodiments 1 to 5 further includes one or more BSs including at least one serving BS.

[0207]

[0215] In Embodiment 7, the apparatus of any of Embodiments 1 to 6 further includes the fact that one or more BSs are different from at least one serving BS.

[0208]

[0216] In embodiment 8, the apparatus of any of embodiments 1 to 7 further includes that information indicating one or more PRS resources is transmitted before the PRS is measured and indicates one or more PRS resources that the UE intends to measure.

[0209]

[0217] In Embodiment 9, the apparatus of any of Embodiments 1 to 8 further includes the processor being configured to determine that a quality metric for one or more PRS resources exceeds a threshold in a previous measurement opportunity, where the information indicates one or more PRS resources having a quality metric that exceeds the threshold.

[0210]

[0218] In embodiment 10, the apparatus of any of embodiments 1 to 9 further includes that the quality metric includes at least one of RSRP, line-of-sight probability, or timing delay calibration value.

[0211]

[0219] In embodiment 11, the apparatus of any of embodiments 1 to 10 further includes that information indicating one or more PRS resources is transmitted after the PRS is measured and indicates a subset of one or more PRS resources measured by the UE.

[0212]

[0220] In embodiment 12, the apparatus of any embodiment 1 to 11 further includes the processor being configured to determine a quality metric for one or more PRS resources and to determine a subset of one or more PRS resources having a quality metric above a threshold, wherein the information indicates a subset of one or more PRS resources having a quality metric above a threshold.

[0213]

[0221] In embodiment 13, the apparatus of any embodiment 1 to 12 further includes that the quality metric includes at least one of RSRP, line-of-sight probability, or timing delay calibration value.

[0214]

[0222] In embodiment 14, the apparatus of any of embodiments 1 to 13 further includes that information is transmitted before or after the PRS is measured within a configured duration of the PRS measurement.

[0215]

[0223] In aspect 15, any aspect of aspects 1 to 14 further includes the UE autonomously determining one or more PRS resources that the UE is configured to measure from a set of PRS resources, wherein the one or more PRS resources are a subset of the set of PRS resources.

[0216]

[0224] Embodiment 16 is a method for wireless communication in a UE, comprising: determining an association between one or more receiving properties of one or more PRS resources and one or more transmitting properties of one or more SRS resources; transmitting to at least one serving BS information indicating one or more PRS resources configured for the UE to measure on a future measurement opportunity; measuring PRS received from one or more BS on one or more PRS resources based on one or more receiving properties; and transmitting SRS on one or more SRS resources based on one or more transmitting properties to one or more BS after measuring the PRS.

[0217]

[0225] In embodiment 17, the method of embodiment 16 further includes one or more receiving properties for PRS reception being associated with at least one receiving beam, and one or more transmitting properties for SRS transmission being associated with at least one transmitting beam, wherein the at least one receiving beam and the at least one transmitting beam have the same set of associated beam directions.

[0218]

[0226] In embodiment 18, the method of embodiment 16 or embodiment 17 further includes that one or more receiving properties for receiving a PRS are associated with a receiving power, and one or more transmitting properties for transmitting an SRS are associated with a transmitting power.

[0219]

[0227] In embodiment 19, any of the methods in embodiments 16 to 18 further includes that one or more receive properties for receiving a PRS are associated with a receive timing, and one or more transmit properties for transmitting an SRS are associated with a transmit timing.

[0220]

[0228] In embodiment 20, any of the methods in embodiments 16 to 19 further includes the information being transmitted via at least one of UCI, MAC-CE, or RRC signaling.

[0221]

[0229] In embodiment 21, any of the methods in embodiments 16 to 20 further includes one or more BSs comprising at least one serving BS.

[0222]

[0230] In embodiment 22, any of the methods in embodiments 16 to 21 further includes the fact that one or more BSs are different from at least one serving BS.

[0223]

[0231] In embodiment 23, any of the methods in embodiments 16 to 22 further includes that information indicating one or more PRS resources is transmitted before the PRS is measured and indicates one or more PRS resources that the UE intends to measure.

[0224]

[0232] Embodiment 24 further includes determining that any of the methods in Embodiments 16 to 23 has exceeded a threshold for one or more PRS resources in a previous measurement opportunity, wherein the information indicates one or more PRS resources having a quality metric that exceeds the threshold.

[0225]

[0233] In embodiment 25, any of the methods in embodiments 16 to 24 further includes that the quality metric includes at least one of RSRP, line-of-sight probability, or timing delay calibration value.

[0226]

[0234] In embodiment 26, any of the methods in embodiments 16 to 25 further includes that information indicating one or more PRS resources is transmitted after the PRS has been measured and indicates a subset of one or more PRS resources measured by the UE.

[0227]

[0235] In embodiment 27, any method of embodiments 16 to 26 further includes determining a quality metric for one or more PRS resources and determining a subset of one or more PRS resources having a quality metric above a threshold, wherein the information indicates a subset of one or more PRS resources having a quality metric above a threshold.

[0228]

[0236] In embodiment 28, any of the methods in embodiments 16 to 27 further includes that the quality metric includes at least one of RSRP, line-of-sight probability, or timing delay calibration value.

[0229]

[0237] In embodiment 29, any of the methods in embodiments 16 to 28 further includes the transmission of information before or after the PRS is measured within a configured duration of the PRS measurement.

[0230]

[0238] In embodiment 30, any embodiment of embodiments 16 to 29 further includes the UE autonomously determining one or more PRS resources which the UE is configured to measure from a set of PRS resources, the one or more PRS resources being a subset of the set of PRS resources.

[0231]

[0239] Embodiment 31 is an apparatus for wireless communication that includes means for implementing the method described in any of Embodiments 16 to 30.

[0232]

[0240] Embodiment 32 is a non-transitory computer-readable medium for storing computer executable code, wherein the code, when executed by the processor, causes the processor to implement the method described in any of Embodiments 16 to 30.

[0233]

[0241] Embodiment 33 is a method for wireless communication in a BS, comprising: receiving information from a UE indicating one or more PRS resources configured to be measured or measured by the UE in a single measurement opportunity; transmitting a PRS on one or more PRS resources indicated based on one or more transmit properties; receiving an SRS from the UE after transmitting a PRS on one or more SRS resources based on one or more receive properties associated with one or more transmit properties; and measuring the received SRS on one or more SRS resources corresponding to the indicated one or more PRS resources.

[0234]

[0242] In embodiment 34, the method of embodiment 33 further includes the fact that one or more transmit properties for PRS transmission are associated with at least one transmit beam, and one or more receive properties for SRS reception are associated with at least one receive beam, the at least one transmit beam and the at least one receive beam have the same set of associated beam directions.

[0235]

[0243] In embodiment 35, the method of embodiment 33 or embodiment 34 further includes that one or more transmit properties for PRS transmission are associated with transmit power, and one or more receive properties for SRS reception are associated with receive power.

[0236]

[0244] In embodiment 36, any of the methods in embodiments 33 to 35 further includes that one or more transmit properties for PRS transmission are associated with transmit timing, and one or more receive properties for SRS reception are associated with receive timing.

[0237]

[0245] In embodiment 37, any of the methods in embodiments 33 to 36 further includes the fact that the information is received via at least one of UCI, MAC-CE, or RRC signaling.

[0238]

[0246] In embodiment 38, any of the methods in embodiments 33 to 37 further includes determining at least one RTT associated with the transmitted PRS and the measured SRS.

[0239]

[0247] In embodiment 39, any of the methods in embodiments 33 to 38 further includes sending received information indicating one or more PRS resources to at least one other BS.

[0240]

[0248] In embodiment 40, any of the methods in embodiments 33 to 39 further includes that information indicating one or more PRS resources is received from the UE via at least one other BS.

[0241]

[0249] In embodiment 41, any of the methods in embodiments 33 to 40 further includes that information indicating one or more PRS resources is received before the PRS is transmitted.

[0242]

[0250] In embodiment 42, any of the methods in embodiments 33 to 41 further includes the fact that information indicating one or more PRS resources is received after the PRS has been transmitted.

[0243]

[0251] In embodiment 43, any of the methods in embodiments 33 to 42 further includes the information being received before or after the transmission of the PRS within the configured duration of the PRS transmission.

[0244]

[0252] Embodiment 44 is a device for wireless communication, comprising at least one processor coupled to memory and configured to implement the method described in any of embodiments 33 to 43.

[0245]

[0253] Embodiment 45 is an apparatus for wireless communication that includes means for implementing the method described in any of Embodiments 33 to 43.

[0246]

[0254] Embodiment 46 is a non-temporary computer-readable medium for storing computer executable code, wherein the code, when executed by the processor, causes the processor to implement the method described in any of Embodiments 33 to 43.

[0247]

[0255] Embodiment 47 is an apparatus for wireless communication in a UE, comprising a memory, a transceiver, and a processor communicatively coupled to the memory and the transceiver, wherein the processor is configured to receive information from at least one serving BS indicating one or more SRS resources or one or more PRS resources corresponding to one or more SRS resources, one or more SRS resources transmit SRS to one or more BS associated with one or more transmit properties based on one or more transmit properties, the SRS transmit on the indicated one or more SRS resources or on one or more SRS resources corresponding to the indicated one or more PRS resources, and after transmitting SRS, prioritize measuring PRS received from at least one BS on one or more PRS resources in one measurement opportunity, the PRS are received based on one or more receive properties associated with one or more transmit properties.

[0248]

[0256] In embodiment 48, the apparatus of embodiment 47 further includes that one or more transmit properties for SRS transmission are associated with at least one transmit beam, and one or more receive properties for PRS reception are associated with at least one receive beam, the at least one receive beam and the at least one transmit beam have the same set of associated beam directions.

[0249]

[0257] In embodiment 49, the apparatus of embodiment 47 or embodiment 48 further includes that one or more transmit properties for SRS transmission are associated with transmit power, and one or more receive properties for PRS reception are associated with receive power.

[0250]

[0258] In embodiment 50, the apparatus of any of embodiments 47 to 49 further includes that one or more transmit properties for SRS transmission are associated with transmit timing, and one or more receive properties for PRS reception are associated with receive timing.

[0251]

[0259] In embodiment 51, the apparatus of any of embodiments 47 to 50 further includes the fact that the information is received via at least one of DCI, MAC-CE, or RRC signaling.

[0252]

[0260] In embodiment 52, the apparatus of any of embodiments 47 to 51 further includes the processor being configured to determine the time difference between the transmission of the SRS and the reception of the PRS, and to transmit information indicating the time difference in the measurement report to at least one serving BS.

[0253]

[0261] In embodiment 53, the apparatus of any of embodiments 47 to 52 further includes one or more BSs including at least one serving BS.

[0254]

[0262] In embodiment 54, the apparatus of any of embodiments 47 to 53 further includes that one or more BSs are different from at least one serving BS.

[0255]

[0263] Embodiment 55 is a method for wireless communication in a UE, comprising: receiving information from at least one serving BS indicating one or more SRS resources or one or more PRS resources corresponding to one or more SRS resources; one or more SRS resources transmitting SRS to one or more BS associated with one or more transmit properties based on one or more transmit properties; the SRS being transmitted on the indicated one or more SRS resources or on one or more SRS resources corresponding to the indicated one or more PRS resources, prioritizing the measurement of PRS received from at least one BS on one or more PRS resources in one measurement opportunity after transmitting the SRS; and the PRS being received based on one or more receive properties associated with one or more transmit properties.

[0256]

[0264] In embodiment 56, the method of embodiment 55 further includes one or more transmit properties for SRS transmission being associated with at least one transmit beam, and one or more receive properties for PRS reception being associated with at least one receive beam, wherein the at least one receive beam and the at least one transmit beam have the same set of associated beam directions.

[0257]

[0265] In embodiment 57, the method of embodiment 55 or embodiment 56 further includes that one or more transmit properties for SRS transmission are associated with transmit power, and one or more receive properties for PRS reception are associated with receive power.

[0258]

[0266] In embodiment 58, any of the methods in embodiments 55 to 57 further includes that one or more transmit properties for SRS transmission are associated with transmit timing, and one or more receive properties for PRS reception are associated with receive timing.

[0259]

[0267] In aspect 59, any of the methods in aspects 55 to 58 further includes the fact that the information is received via at least one of DCI, MAC-CE, or RRC signaling.

[0260]

[0268] In embodiment 60, any of the methods in embodiments 55 to 59 further includes determining the time difference between the transmission of an SRS and the reception of a PRS, and transmitting information indicating the time difference in the measurement report to at least one serving BS.

[0261]

[0269] In embodiment 61, any of the methods of embodiments 55 to 60 further includes one or more BSs comprising at least one serving BS.

[0262]

[0270] In embodiment 62, any of the methods in embodiments 55 to 61 further includes the fact that one or more BSs are different from at least one serving BS.

[0263]

[0271] Embodiment 63 is an apparatus for wireless communication, which includes means for implementing the method described in any of embodiments 55 to 62.

[0264]

[0272] Embodiment 64 is a non-temporary computer-readable medium for storing computer executable code, wherein the code, when executed by the processor, causes the processor to implement the method described in any of embodiments 55 to 62.

[0265]

[0273] Embodiment 65 is a method for wireless communication in a BS, comprising: measuring an SRS received from a UE on one or more SRS resources at a measurement opportunity; determining a subset of SRS resources of one or more SRS resources; transmitting a PRS to a UE on one or more PRS resources based on one or more transmit properties in a BS, wherein the subset of SRS resources corresponds to one or more receive properties in a BS, and the one or more PRS resources correspond to the determined subset of SRS resources, and the one or more transmit properties are associated with one or more receive properties.

[0266]

[0274] In embodiment 66, the method of embodiment 65 further includes one or more receiving properties for receiving an SRS being associated with at least one receiving beam, and one or more transmitting properties for transmitting a PRS being associated with at least one transmitting beam, wherein the at least one transmitting beam and the at least one receiving beam have the same set of associated beam directions.

[0267]

[0275] In embodiment 67, the method of embodiment 65 or embodiment 66 further includes that one or more receiving properties for receiving an SRS are associated with a receiving power, and one or more transmitting properties for transmitting a PRS are associated with a transmitting power.

[0268]

[0276] In embodiment 68, any of the methods in embodiments 65 to 67 further includes that one or more receive properties for receiving an SRS are associated with a receive timing, and one or more transmit properties for transmitting a PRS are associated with a transmit timing.

[0269]

[0277] In aspect 69, any method of aspects 65 to 68 further includes transmitting to the UE information indicating a subset of SRS resources or one or more PRS resources corresponding to a subset of SRS resources.

[0270]

[0278] In Aspect 70, the method according to any one of Aspects 65 to 69, further comprising that the information is transmitted via at least one of DCI, MAC-CE, or RRC signaling.

[0271]

[0279] In Aspect 71, the method according to any one of Aspects 65 to 70, further comprising that the information is transmitted after the SRS is measured within a configured duration of the SRS measurement.

[0272]

[0280] In Aspect 72, the method according to any one of Aspects 65 to 71, wherein determining the subset of SRS resources further comprises: determining a quality metric for one or more SRS resources; and determining the subset of SRS resources based on the SRS resources in the subset having a quality metric that exceeds a threshold value.

[0273]

[0281] In Aspect 73, the method according to any one of Aspects 65 to 72, further comprising that the quality metric includes at least one of RSRP, line-of-sight probability, or timing delay calibration value.

[0274]

[0282] Aspect 74 is an apparatus for wireless communication, comprising at least one processor coupled to a memory and configured to implement the method according to any one of Aspects 65 to 73.

[0275]

[0283] Aspect 75 is an apparatus for wireless communication, comprising means for implementing the method according to any one of Aspects 65 to 73.

[0276]

[0284] Aspect 76 is a non-transitory computer-readable medium storing computer-executable code, wherein when the code is executed by a processor, the code causes the processor to implement the method according to any one of Aspects 65 to 73.

[0277]

[0285] It should be understood that the specific order or hierarchy of blocks in the disclosed process / flowchart is an example of an exemplary technique. It should be understood that the specific order or hierarchy of blocks in the process / flowchart may be reconfigured based on design preferences. Furthermore, some blocks may be combined or omitted. The attached method claims present elements of various blocks in an exemplary order, and are not limited to the specific order or hierarchy presented.

[0278]

[0286] The above description is provided so that a person skilled in the art may carry out the various embodiments described herein. Various modifications to these embodiments will be readily apparent to a person skilled in the art, and the general principles defined herein may apply to other embodiments. Accordingly, the claims should not be limited to the embodiments shown herein, but should be given the maximum scope that is not inconsistent with the claim language, and here, references to singular elements mean "one or more" and not "one unique" unless otherwise explicitly stated. Terms such as "if," "when," and "while" should be interpreted as meaning "under the condition that," rather than implying an immediate temporal relationship or response. That is, these phrases, for example, "when," do not imply an immediate action in response to or during the occurrence of an action, but simply imply that an action occurs if the condition is met, but does not require a specific or immediate temporal constraint on which the action should occur. The word "exemplary" is used herein to mean "to serve as an example, case, or illustration." Any embodiment described herein as “exemplary” should not necessarily be construed as being more preferable or advantageous than any other embodiment. Unless otherwise specified, 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 A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combination may include one or more members of A, B, or C. All structural and functional equivalents to elements of various aspects described throughout this disclosure are known to those skilled in the art, or will become known thereafter, and are expressly incorporated herein by reference and intended to be encompassed by the claims. Furthermore, nothing disclosed herein is made public, whether such disclosure is expressly represented in the claims or not. Words such as “module,” “mechanism,” “element,” and “device” may not be substitutes for the word “means.” Therefore, no claim element should be interpreted as means plus function unless it is explicitly stated using the phrase “means for.” The invention described in the original claims of this application is listed below. [C1] A device for wireless communication in user equipment (UE), Memory and Transceiver and, A processor that is communicatively coupled to the memory and the transceiver. The processor is equipped with, Determining the association between one or more receive properties of one or more positioning reference signal (PRS) resources and one or more transmit properties of one or more sounding reference signal (SRS) resources, Transmitting information to at least one serving base station (BS) indicating one or more PRS resources configured for the UE to measure in future measurement opportunities, Measuring the PRS received from one or more BS on the one or more PRS resources based on the one or more receiving properties, After measuring the PRS (and based on the determined association), transmit the SRS on the one or more SRS resources based on the one or more transmit properties to the one or more BS. A device configured to perform the following actions. [C2] The apparatus according to C1, wherein the one or more receiving properties of the PRS for receiving are associated with at least one receiving beam, and the one or more transmitting properties of the SRS for transmitting are associated with at least one transmitting beam, the at least one receiving beam and the at least one transmitting beam have the same set of associated beam directions. [C3] The apparatus according to C1, wherein the one or more receiving properties of the PRS for receiving are associated with a receiving power, and the one or more transmitting properties of the SRS for transmitting are associated with a transmitting power. [C4] The apparatus according to C1, wherein the one or more receiving properties for the PRS for receiving are associated with a receiving timing, and the one or more transmitting properties for the SRS for transmitting are associated with a transmitting timing. [C5] The apparatus according to C1, wherein the information is transmitted via at least one of uplink control information (UCI), media access control (MAC) control element (CE) (MAC-CE), or radio resource control (RRC) signaling. [C6] The apparatus according to C1, wherein the one or more BS comprises the at least one serving BS. [C7] The apparatus according to C1, wherein the one or more BSs are different from the at least one serving BS. [C8] The apparatus according to C1, wherein the information indicating the one or more PRS resources is transmitted before the PRS is measured and indicates the one or more PRS resources that the UE intends to measure. [C9] The aforementioned processor, Determining that a quality metric for one or more PRS resources exceeds a threshold in a previous measurement opportunity, wherein the information indicates the one or more PRS resources having the quality metric that exceeds the threshold. The apparatus described in C8, further configured to perform the following actions. [C10] The apparatus according to C9, wherein the quality metric comprises at least one of the following: reference signal received power (RSRP), line of sight (LoS) probability, or timing delay calibration value. [C11] The apparatus according to C1, wherein the information indicating the one or more PRS resources is transmitted after the PRS has been measured and indicates a subset of the one or more PRS resources measured by the UE. [C12] The aforementioned processor, Determining quality metrics for one or more PRS resources, Determining the subset of one or more PRS resources that have quality metrics exceeding a threshold, Herein, the information indicates the subset of one or more PRS resources having the quality metric exceeding the threshold. The apparatus described in C11, further configured to perform the following actions. [C13] The apparatus according to C12, wherein the quality metric comprises at least one of the following: reference signal received power (RSRP), line of sight (LoS) probability, or timing delay calibration value. [C14] The apparatus according to C1, wherein the information is transmitted before or after the measurement of the PRS within the configured duration of the measurement of the PRS. [C15] The apparatus according to C1, wherein the UE autonomously determines one or more PRS resources configured to be measured from a set of PRS resources, the one or more PRS resources being a subset of the set of PRS resources. [C16] A method for wireless communication in user equipment (UE), Determining the association between one or more receive properties of one or more positioning reference signal (PRS) resources and one or more transmit properties of one or more sounding reference signal (SRS) resources, Transmitting information to at least one serving base station (BS) indicating one or more PRS resources configured for the UE to measure in future measurement opportunities, Measuring the PRS received from one or more BS on the one or more PRS resources based on the one or more receiving properties, A method comprising measuring the PRS and then transmitting an SRS on one or more SRS resources to one or more BS based on one or more transmission properties. [C17] The method according to C16, wherein the one or more receiving properties for the PRS for receiving are associated with at least one receiving beam, and the one or more transmitting properties for the SRS for transmitting are associated with at least one transmitting beam, the at least one receiving beam and the at least one transmitting beam have the same set of associated beam directions. [C18] The method according to C16, wherein the one or more receiving properties for the PRS for receiving are associated with a receiving power, and the one or more transmitting properties for the SRS for transmitting are associated with a transmitting power. [C19] The method according to C16, wherein the one or more receive properties for the PRS for receiving are associated with a receive timing, and the one or more transmit properties for the SRS for transmitting are associated with a transmit timing. [C20] The method according to C16, wherein the information is transmitted via at least one of uplink control information (UCI), media access control (MAC) control element (CE) (MAC-CE), or radio resource control (RRC) signaling. [C21] The method according to C16, wherein the one or more BS comprises the at least one serving BS. [C22] The method according to C16, wherein the one or more BS is different from the at least one serving BS. [C23] The method according to C16, wherein the information indicating the one or more PRS resources is transmitted before the PRS is measured and indicates the one or more PRS resources that the UE intends to measure. [C24] The method according to C23, further comprising determining that a quality metric for one or more PRS resources exceeds a threshold in a previous measurement opportunity, wherein the information indicates the one or more PRS resources having the quality metric that exceeds the threshold. [C25] The method according to C24, wherein the quality metric comprises at least one of the following: reference signal received power (RSRP), line of sight (LoS) probability, or timing delay calibration value. [C26] The method according to C16, wherein the information indicating the one or more PRS resources is transmitted after the PRS has been measured and indicates a subset of the one or more PRS resources measured by the UE. [C27] Determining quality metrics for one or more PRS resources, Determining the subset of one or more PRS resources that have quality metrics exceeding a threshold, Herein, the information indicates the subset of one or more PRS resources having the quality metric exceeding the threshold. A method for C26 that further incorporates these features. [C28] The method according to C27, wherein the quality metric comprises at least one of the following: reference signal received power (RSRP), line of sight (LoS) probability, or timing delay calibration value. [C29] The method according to C16, wherein the information is transmitted before or after the measurement of the PRS within a configured duration of the measurement of the PRS. [C30] The method according to C16, wherein the UE autonomously determines one or more PRS resources that the UE is configured to measure from a set of PRS resources, the one or more PRS resources being a subset of the set of PRS resources. [C31] A device for wireless communication in user equipment (UE), Means for determining the association between one or more receive properties of one or more positioning reference signal (PRS) resources and one or more transmit properties of one or more sounding reference signal (SRS) resources, Means for transmitting to at least one serving base station (BS) information indicating one or more PRS resources configured to be measured by the UE in a future measurement opportunity, Means for measuring PRS received from one or more BS on one or more PRS resources based on one or more receiving properties, After measuring the PRS, the means for transmitting SRS on the one or more SRS resources based on the one or more transmission properties to the one or more BS A device equipped with the following features. [C32] The apparatus according to C31, wherein the one or more receiving properties for the PRS for receiving are associated with at least one receiving beam, and the one or more transmitting properties for the SRS for transmitting are associated with at least one transmitting beam, and the at least one receiving beam and the at least one transmitting beam have the same set of associated beam directions. [C33] The apparatus according to C31, wherein the one or more receiving properties for the PRS for receiving are associated with a receiving power, and the one or more transmitting properties for the SRS for transmitting are associated with a transmitting power. [C34] The apparatus according to C31, wherein the one or more receiving properties for the PRS for receiving are associated with a receiving timing, and the one or more transmitting properties for the SRS for transmitting are associated with a transmitting timing. [C35] The apparatus according to C31, wherein the information is transmitted via at least one of uplink control information (UCI), media access control (MAC) control element (CE) (MAC-CE), or radio resource control (RRC) signaling. [C36] The apparatus according to C31, wherein the one or more BS comprises the at least one serving BS. [C37] The apparatus according to C31, wherein the one or more BSs are different from the at least one serving BS. [C38] The apparatus according to C31, wherein the information indicating the one or more PRS resources is transmitted before the PRS is measured and indicates the one or more PRS resources that the UE intends to measure. [C39] The apparatus according to C38, further comprising means for determining that a quality metric for one or more PRS resources exceeds a threshold in a previous measurement opportunity, wherein the information indicates the one or more PRS resources having the quality metric exceeding the threshold. [C40] The apparatus according to C39, wherein the quality metric comprises at least one of the following: reference signal received power (RSRP), line of sight (LoS) probability, or timing delay calibration value. [C41] The apparatus according to C31, wherein the information indicating the one or more PRS resources is transmitted after the PRS has been measured and indicates a subset of the one or more PRS resources measured by the UE. [C42] Means for determining quality metrics for one or more PRS resources, Means for determining the subset of one or more PRS resources having quality metrics exceeding a threshold, Herein, the information indicates the subset of one or more PRS resources having the quality metric exceeding the threshold. The apparatus described in C41, further comprising the above. [C43] The apparatus according to C42, wherein the quality metric comprises at least one of the following: reference signal received power (RSRP), line of sight (LoS) probability, or timing delay calibration value. [C44] The apparatus according to C31, wherein the information is transmitted before or after the PRS is measured within a configured duration of the measurement of the PRS. [C45] The apparatus according to C31, wherein the UE autonomously determines one or more PRS resources configured to be measured from a set of PRS resources, the one or more PRS resources being a subset of the set of PRS resources. [C46] A non-temporary computer-readable medium for storing computer executable code in a user device (UE), wherein, when the code is executed by a processor, the processor... Determining the association between one or more receive properties of one or more positioning reference signal (PRS) resources and one or more transmit properties of one or more sounding reference signal (SRS) resources, Transmitting information to at least one serving base station (BS) indicating one or more PRS resources configured for the UE to measure in future measurement opportunities, Measuring the PRS received from one or more BS on the one or more PRS resources based on the one or more receiving properties, A non-temporary computer-readable medium that, after measuring the PRS, causes one or more BSs to transmit an SRS on one or more SRS resources based on one or more transmit properties. [C47] A device for wireless communication in user equipment (UE), Memory and Transceiver and, A processor that is communicatively coupled to the memory and the transceiver. The processor is equipped with, Receiving information from at least one serving base station (BS) indicating one or more sounding reference signal (SRS) resources or one or more position reference signal (PRS) resources corresponding to the one or more SRS resources; the one or more SRS resources being associated with one or more transmit properties; transmitting SRS to one or more BS based on the one or more transmit properties; and the SRS being transmitted on the indicated one or more SRS resources or on the one or more SRS resources corresponding to the indicated one or more PRS resources. Prioritizing the measurement of PRS received from at least one BS on one or more PRS resources in a single measurement opportunity after transmitting the SRS, and the PRS being received based on one or more receiving properties associated with one or more transmitting properties, A device configured to perform the following actions. [C48] The apparatus according to C47, wherein the one or more transmit properties for the transmission of the SRS are associated with at least one transmit beam, and the one or more receive properties for the reception of the PRS are associated with at least one receive beam, and the at least one receive beam and the at least one transmit beam have the same set of associated beam directions. [C49] The apparatus according to C47, wherein the one or more transmit properties for the transmission of the SRS are associated with transmit power, and the one or more receive properties for the reception of the PRS are associated with receive power. [C50] The apparatus according to C47, wherein the one or more transmit properties for the transmission of the SRS are associated with a transmit timing, and the one or more receive properties for the reception of the PRS are associated with a receive timing. [C51] The apparatus according to C47, wherein the information is received via at least one of the following: downlink control information (DCI), media access control (MAC) control element (CE) (MAC-CE), or radio resource control (RRC) signaling. [C52] The aforementioned processor, Determining the time difference between the transmission of the SRS and the reception of the PRS, The information indicating the time difference in the measurement report is transmitted to at least one of the serving BS. The apparatus described in C47, further configured to perform the following actions. [C53] The apparatus according to C47, wherein the one or more BS comprises the at least one serving BS. [C54] The apparatus according to C47, wherein the one or more BSs are different from the at least one serving BS. [C55] A method for wireless communication in user equipment (UE), Receiving information from at least one serving base station (BS) indicating one or more sounding reference signal (SRS) resources or one or more position reference signal (PRS) resources corresponding to the one or more SRS resources; the one or more SRS resources being associated with one or more transmit properties; transmitting SRS to one or more BS based on the one or more transmit properties; and the SRS being transmitted on the indicated one or more SRS resources or on the one or more SRS resources corresponding to the indicated one or more PRS resources. Prioritizing the measurement of PRS received from at least one BS on one or more PRS resources in a single measurement opportunity after transmitting the SRS, and the PRS being received based on one or more receiving properties associated with one or more transmitting properties, A method that includes [something]. [C56] The method according to C55, wherein the one or more transmit properties for the transmission of the SRS are associated with at least one transmit beam, and the one or more receive properties for the reception of the PRS are associated with at least one receive beam, the at least one receive beam and the at least one transmit beam have the same set of associated beam directions. [C57] The method according to C55, wherein the one or more transmit properties for the transmission of the SRS are associated with transmit power, and the one or more receive properties for the reception of the PRS are associated with receive power. [C58] The method according to C55, wherein the one or more transmit properties for the transmission of the SRS are associated with a transmit timing, and the one or more receive properties for the reception of the PRS are associated with a receive timing. [C59] The method according to C55, wherein the information is received via at least one of downlink control information (DCI), media access control (MAC) control element (CE) (MAC-CE), or radio resource control (RRC) signaling. [C60] Determining the time difference between the transmission of the SRS and the reception of the PRS, The information indicating the time difference in the measurement report is transmitted to at least one of the serving BS. A method for C55 that further incorporates these features. [C61] The method according to C55, wherein the one or more BS comprises the at least one serving BS. [C62] The method according to C55, wherein the one or more BSs are different from the at least one serving BS. [C63] A device for wireless communication in user equipment (UE), Means for receiving information from at least one serving base station (BS) indicating one or more sounding reference signal (SRS) resources or one or more position reference signal (PRS) resources corresponding to the one or more SRS resources, and the one or more SRS resources being associated with one or more transmit properties Means for transmitting an SRS to one or more BSs based on one or more transmission properties, and the SRS being transmitted on one or more of the indicated SRS resources or on one or more SRS resources corresponding to the indicated one or more PRS resources. Means for prioritizing the measurement of PRS received from at least one BS on one or more PRS resources in a single measurement opportunity after transmitting the SRS, and the PRS being received based on one or more receiving properties associated with one or more transmission properties, A device equipped with the following features. [C64] The apparatus according to C63, wherein the one or more transmit properties for the transmission of the SRS are associated with at least one transmit beam, and the one or more receive properties for the reception of the PRS are associated with at least one receive beam, and the at least one receive beam and the at least one transmit beam have the same set of associated beam directions. [C65] The apparatus according to C63, wherein the one or more transmit properties for the transmission of the SRS are associated with transmit power, and the one or more receive properties for the reception of the PRS are associated with receive power. [C66] The apparatus according to C63, wherein the one or more transmit properties for the transmission of the SRS are associated with a transmit timing, and the one or more receive properties for the reception of the PRS are associated with a receive timing. [C67] The apparatus according to C63, wherein the information is received via at least one of the following: downlink control information (DCI), media access control (MAC) control element (CE) (MAC-CE), or radio resource control (RRC) signaling. [C68] Means for determining the time difference between the transmission of the SRS and the reception of the PRS, The at least one serving BS has means for transmitting information indicating the time difference in the measurement report. The apparatus described in C63, further comprising the above. [C69] The apparatus according to C63, wherein the one or more BS comprises the at least one serving BS. [C70] The apparatus according to C63, wherein the one or more BSs are different from the at least one serving BS. [C71] A computer-readable medium for storing computer-executable code in a user device (UE), wherein, when executed by a processor, the code provides the processor with information indicating one or more sounding reference signal (SRS) resources or one or more position reference signal (PRS) resources corresponding to the one or more SRS resources from at least one serving base station (BS); the one or more SRS resources being associated with one or more transmit properties; transmitting the SRS to one or more BS based on the one or more transmit properties; and transmitting the SRS on the indicated one or more SRS resources or on the one or more SRS resources corresponding to the indicated one or more PRS resources. Prioritizing the measurement of PRS received from at least one BS on one or more PRS resources in a single measurement opportunity after transmitting the SRS, and the PRS being received based on one or more receiving properties associated with one or more transmitting properties, A computer-readable medium that enables the operation of a computer.

Claims

1. A wireless communication method related to position estimation based on multi-round-trip time (RTT) measurement in user equipment (UE), Determining the association between one or more receive properties of one or more positioning reference signal (PRS) resources and one or more transmit properties of one or more sounding reference signal (SRS) resources, Transmitting information to at least one serving base station (BS) indicating one or more PRS resources configured for the UE to measure in future measurement opportunities, Based on the aforementioned information, measure the PRS received from one or more BS on the one or more PRS resources based on the one or more receiving properties, After measuring the PRS, transmit the SRS on the one or more SRS resources to the one or more BS based on the one or more transmission properties associated with the one or more reception properties. A method that includes [something].

2. The method according to claim 1, wherein the one or more receiving properties for the PRS for receiving are associated with at least one receiving beam, and the one or more transmitting properties for the SRS for transmitting are associated with at least one transmitting beam, the at least one receiving beam and the at least one transmitting beam have the same set of associated beam directions.

3. The method according to claim 1, wherein the one or more receiving properties for the PRS for receiving are associated with a receiving power, and the one or more transmitting properties for the SRS for transmitting are associated with a transmitting power.

4. The method according to claim 1, wherein the one or more receiving properties for the PRS for receiving are associated with a receiving timing, and the one or more transmitting properties for the SRS for transmitting are associated with a transmitting timing.

5. The method according to claim 1, wherein the information is transmitted via at least one of uplink control information (UCI), media access control (MAC) control element (CE) (MAC-CE), or radio resource control (RRC) signaling.

6. The method according to claim 1, wherein the one or more BS comprises the at least one serving BS.

7. A device for wireless communication related to position estimation based on multi-round-trip time (RTT) measurement in user equipment (UE), Means for determining the association between one or more receive properties of one or more positioning reference signal (PRS) resources and one or more transmit properties of one or more sounding reference signal (SRS) resources, Means for transmitting to at least one serving base station (BS) information indicating the one or more PRS resources configured to be measured by the UE in a future measurement opportunity, Means for measuring PRS received from one or more BS on one or more PRS resources based on the information described above, After measuring the PRS, means for transmitting SRS on one or more SRS resources based on one or more transmission properties associated with one or more reception properties to one or more BS A device equipped with the following features.

8. The apparatus according to claim 7, further comprising means for carrying out the method described in any one of claims 2 to 6.

9. A non-temporary computer-readable medium for storing computer-executable code in a user device (UE), wherein the code, when executed by a processor, causes the processor to perform the method according to any one of claims 1 to 6.

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