# US 2023/0276404 A1 · Method and apparatus for power and processing savings for positioning reference signals transmitted in beams > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0276404 A1 - Document ID: US20230276404A1 - Status: Published application - Kind: A1 - Application number: 18/312,513 - Filed: 2023-05-04 - Published: 2023-08-31 - Earliest claimed: 2020-12-28 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Mukesh KUMAR; Guttorm Ringstad OPSHAUG; . SIDDHANT - Web page: https://patentgrep.com/patent/US20230276404A1 ## CPC - H04W 64/003: {locating network equipment} - H04W 64/006: {with additional information processing, e.g. for direction or speed determination} - G01S 1/08: Systems for determining direction or position line - G01S 3/043: {Receivers} - G01S 5/0221: {Receivers} - H04B 7/06952: {Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping} - H04B 17/328: {Reference signal received power [RSRP]; Reference signal received quality [RSRQ]} - H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} - H04L 1/18: Automatic repetition systems, e.g. Van Duuren systems - H04L 5/0023: {Time-frequency-space} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04W 4/02: Services making use of location information - H04L 1/20: using signal quality detector - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A mobile device supports positioning with positioning reference signals (PRS) on multiple beam by dividing the PRS processing into two separate modes, an acquisition mode and a tracking mode. In acquisition mode, the mobile device performs a fast scan of all of the beams from a base station transmitting PRS using less than the full set of resources for the PRS, i.e., less than the full bandwidth and/or less than the full number of repetitions of the PRS. The mobile device may select the best beams to use for positioning, e.g., based on signal strength metric. In tracking mode, the mobile device tracks the PRS from only the selected beams using the full set of resources for the PRS. The mobile device may return to acquisition mode after a predetermined number of positioning occasions or if the selected beams are no longer valid due to movement or change in conditions. ## Claims ### Claim 1 A method for supporting positioning of a mobile device in a wireless network performed by the mobile device, the method comprising: receiving positioning reference signals (PRS) transmitted in a plurality of beams from a base station, wherein less than a full set of resources for the PRS in each beam is used to measure the PRS; selecting a predetermined number of beams from the plurality of beams; and measuring the PRS from the selected beams using the full set of resources for the PRS produced by each selected beam. ### Claim 2 (depends on 1) The method of claim 1, wherein less than the full set of resources for the PRS comprises less than a full bandwidth for the PRS. ### Claim 3 (depends on 1) The method of claim 1, wherein less than the full set of resources for the PRS comprises less than a full number of repetitions of the PRS in a positioning occasion. ### Claim 4 (depends on 1) The method of claim 1, wherein less than the full set of resources for the PRS comprises less than a full bandwidth for the PRS and less than a full number of repetitions of the PRS in a positioning occasion. ### Claim 5 (depends on 1) The method of claim 1, further comprising performing positioning of the mobile device using the measured PRS from the selected beams. ### Claim 6 (depends on 1) The method of claim 1, wherein receiving the PRS comprises selecting a fraction of a full bandwidth of each beam and tuning to receive radio signals on the fraction of the full bandwidth, and wherein measuring the PRS from the selected beams using the full set of resources for the PRS produced by each selected beam comprises tuning to receive radio signals on the full bandwidth. ### Claim 7 (depends on 1) The method of claim 1, wherein receiving the PRS comprises selecting a fraction of a full number of repetitions for the PRS in a positioning occasion and integrating over only the fraction of the full number of repetitions to receive the PRS, and wherein measuring the PRS from the selected beams using the full set of resources for the PRS produced by each selected beam comprises integrating over the full number of repetitions to measure the PRS. ### Claim 8 (depends on 1) The method of claim 1, wherein selecting the predetermined number of beams comprises: determining at least one signal strength metric for each beam in the plurality of beams; comparing the at least one signal strength metric to a corresponding at least one predetermined threshold; and selecting the predetermined number of beams based on the comparison of the at least one signal strength metric to the corresponding at least one predetermined threshold. ### Claim 9 (depends on 1) The method of claim 1, wherein the predetermined number of beams are selected based on at least one signal strength metric of each beam, and wherein the method further comprises: selecting a fraction of the full set of resources for the PRS to receive the PRS; determining whether the at least one signal strength metric exceeds a corresponding at least one predetermined threshold; and increasing the fraction of the full set of resources for the PRS to receive the PRS when the at least one signal strength metric does not exceed the corresponding at least one predetermined threshold for the predetermined number of beams. ### Claim 10 (depends on 9) The method of claim 9, further comprising iteratively increasing at least one of a fraction of a full bandwidth or a fraction of a full number of repetitions to receive the PRS and determining whether the at least one signal strength metric exceeds the corresponding at least one predetermined threshold until the at least one signal strength metric exceeds the corresponding at least one predetermined threshold for the predetermined number of beams. ### Claim 11 (depends on 1) The method of claim 1, wherein the predetermined number of beams are selected based on at least one signal strength metric of each beam, and wherein the method further comprises: selecting a fraction of the full set of resources for the PRS to receive the PRS; determining whether the at least one signal strength metric exceeds a corresponding at least one predetermined threshold; and selecting the predetermined number of beams for receiving when the at least one signal strength metric exceeds the corresponding at least one predetermined threshold for more than the predetermined number of beams. ### Claim 12 (depends on 11) The method of claim 11, the method further comprising decreasing at least one of a fraction of a full bandwidth or a fraction of a full number of repetitions to receive the PRS in a subsequent positioning occasion. ### Claim 13 (depends on 1) The method of claim 1, further comprising: measuring the PRS from the selected beams using the full set of resources for the PRS produced by each selected beam for multiple positioning occasions; determining a difference in at least one signal strength metric between two positioning occasions for one or more selected beams is below a predetermined threshold; and receiving the PRS transmitted in the plurality of beams using less than the full set of resources for the PRS produced by each beam after determining the difference is below the predetermined threshold. ### Claim 14 (depends on 1) The method of claim 1, further comprising: measuring the PRS from the selected beams using the full set of resources for the PRS produce by each selected beam for a predetermined number of positioning occasions; and receiving the PRS transmitted in the plurality of beams using less than the full set of resources for the PRS produced by each beam after the predetermined number of positioning occasions. ### Claim 15 A mobile device configured for supporting positioning of the mobile device in a wireless network, comprising: a wireless transceiver configured to wirelessly communicate in the wireless network; at least one memory; at least one processor coupled to the wireless transceiver and the at least one memory, wherein the at least one processor is configured to: receive, using the wireless transceiver, positioning reference signals (PRS) transmitted in a plurality of beams from a base station, wherein less than a full set of resources for the PRS in each beam is used to measure the PRS; select a predetermined number of beams from the plurality of beams; and measure, using the wireless transceiver, the PRS from the selected beams using the full set of resources for the PRS produced by each selected beam. ### Claim 16 (depends on 15) The mobile device of claim 15, wherein less than the full set of resources for the PRS comprises less than a full bandwidth for the PRS. ### Claim 17 (depends on 15) The mobile device of claim 15, wherein less than the full set of resources for the PRS comprises less than a full number of repetitions of the PRS in a positioning occasion. ### Claim 18 (depends on 15) The mobile device of claim 15, wherein less than the full set of resources for the PRS comprises less than a full bandwidth for the PRS and less than a full number of repetitions of the PRS in a positioning occasion. ### Claim 19 (depends on 15) The mobile device of claim 15, wherein the at least one processor is further configured to perform positioning of the mobile device using the measured PRS from the selected beams. ### Claim 20 (depends on 15) The mobile device of claim 15, wherein the at least one processor is configured to receive the PRS by being configured to select a fraction of a full bandwidth of each beam and tune the wireless transceiver to receive radio signals on the fraction of the full bandwidth, and wherein the at least one processor is configured to measure the PRS from the selected beams using the full set of resources for the PRS produced by each selected beam by being configured to tune the wireless transceiver to receive radio signals on the full bandwidth. ### Claim 21 (depends on 15) The mobile device of claim 15, wherein the at least one processor is configured to receive the PRS by being configured to select a fraction of a full number of repetitions for the PRS in a positioning occasion and integrate over only the fraction of the full number of repetitions to receive the PRS, and wherein the at least one processor is configured to measure the PRS from the selected beams using the full set of resources for the PRS produced by each selected beam by being configured to integrate over the full number of repetitions to measure the PRS. ### Claim 22 (depends on 15) The mobile device of claim 15, wherein the at least one processor is configured to select the predetermined number of beams by being configured to: determine at least one signal strength metric for each beam in the plurality of beams; compare the at least one signal strength metric to a corresponding at least one predetermined threshold; and select the predetermined number of beams based on the comparison of the at least one signal strength metric to the corresponding at least one predetermined threshold. ### Claim 23 (depends on 15) The mobile device of claim 15, wherein the predetermined number of beams are selected based on at least one signal strength metric of each beam, and wherein the at least one processor is further configured to: select a fraction of the full set of resources for the PRS to receive the PRS; determine whether the at least one signal strength metric exceeds a corresponding at least one predetermined threshold; and increase the fraction of the full set of resources for the PRS to receive the PRS when the at least one signal strength metric does not exceed the corresponding at least one predetermined threshold for the predetermined number of beams. ### Claim 24 (depends on 23) The mobile device of claim 23, wherein the at least one processor is further configured to iteratively increase at least one of a fraction of a full bandwidth or a fraction of a full number of repetitions to receive the PRS and determine whether the at least one signal strength metric exceeds the corresponding at least one predetermined threshold until the at least one signal strength metric exceeds the corresponding at least one predetermined threshold for the predetermined number of beams. ### Claim 25 (depends on 15) The mobile device of claim 15, wherein the predetermined number of beams are selected based on at least one signal strength metric of each beam, and wherein the at least one processor is further configured to: select a fraction of the full set of resources for the PRS to receive the PRS; determine whether the at least one signal strength metric exceeds a corresponding at least one predetermined threshold; and select the predetermined number of beams for receiving when the at least one signal strength metric exceeds the corresponding at least one predetermined threshold for more than the predetermined number of beams. ### Claim 26 (depends on 25) The mobile device of claim 25, wherein the at least one processor is further configured to decrease at least one of a fraction of a full bandwidth or a fraction of a full number of repetitions to receive the PRS in a subsequent positioning occasion. ### Claim 27 (depends on 15) The mobile device of claim 15, wherein the at least one processor is further configured to: measure, using the wireless transceiver, the PRS from the selected beams using the full set of resources for the PRS produced by each selected beam for multiple positioning occasions; determine a difference in at least one signal strength metric between two positioning occasions for one or more selected beams is below a predetermined threshold; and receive, using the wireless transceiver, the PRS transmitted in the plurality of beams using less than the full set of resources for the PRS produced by each beam after determining the difference is below the predetermined threshold. ### Claim 28 (depends on 15) The mobile device of claim 15, wherein the at least one processor is further configured to: measure, using the wireless transceiver, the PRS from the selected beams using the full set of resources for the PRS produce by each selected beam for a predetermined number of positioning occasions; and receive, using the wireless transceiver, the PRS transmitted in the plurality of beams using less than the full set of resources for the PRS produced by each beam after the predetermined number of positioning occasions. ### Claim 29 A mobile device configured for supporting positioning of the mobile device in a wireless network, comprising: means for receiving positioning reference signals (PRS) transmitted in a plurality of beams from a base station, wherein less than a full set of resources for the PRS in each beam is used to measure the PRS; means for selecting a predetermined number of beams from the plurality of beams; and means for measuring the PRS from the selected beams using the full set of resources for the PRS produced by each selected beam. ### Claim 30 A non-transitory computer readable storage medium including program code stored thereon, the program code is operable to configure at least one processor in a mobile device for supporting positioning of the mobile device in a wireless network, comprising: program code to receive positioning reference signals (PRS) transmitted in a plurality of beams from a base station, wherein less than a full set of resources for the PRS in each beam is used to measure the PRS; program code to select a predetermined number of beams from the plurality of beams; and program code to measure the PRS from the selected beams using the full set of resources for the PRS produced by each selected beam.