# US 12,120,544 B2 · Reducing the overhead of reporting measurements and transmission-reception point (TRP) identifiers in positioning state information (PSI) > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,544 B2 - Document ID: US12120544B2 - Status: Granted - Kind: B2 - Application number: 17/317,718 - Filed: 2021-05-11 - Published: 2021-11-18 - Granted: 2024-10-15 - Earliest claimed: 2020-05-15 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Weimin Duan; Alexandros Manolakos; Tingfang Ji; Wanshi Chen - Web page: https://patentgrep.com/patent/US12120544B2 ## CPC - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management - G01S 5/0036: {of measured values, i.e. measurement on mobile and position calculation on base station} - G01S 5/0205: {Details} - G01S 7/006: {using shared front-end circuitry, e.g. antennas (G01S13/765, G01S13/825 take precedence)} - G01S 13/765: {with exchange of information between interrogator and responder} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 80/02: Data link layer protocols - G01S 5/0236: {Assistance data, e.g. base station almanac} - G01S 5/10: Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements {, e.g. omega or decca systems}(G01S5/12 takes precedence {; beacons and receivers cooperating therewith G01S1/306, G01S1/308}) - G01S 2205/008: using a mobile telephone network - 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)} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - 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 - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Disclosed are techniques for reducing the overhead of low layer positioning reports. In an aspect, a user equipment (UE) performs at least one positioning measurement of at least one downlink positioning reference signal (DL-PRS) received from at least one transmission-reception point (TRP) during a positioning session, and reports, to a positioning entity via low layer signaling, a relative value of the at least one positioning measurement relative to an expected value of the at least one positioning measurement, wherein the relative value of the at least one positioning measurement is a difference between the expected value of the at least one positioning measurement and a measured value of the at least one positioning measurement. ## Claims ### Claim 1 A method of wireless positioning performed by a user equipment (UE), comprising: performing at least one positioning measurement of a first downlink positioning reference signal (DL-PRS) received from a first transmission-reception point (TRP) and a second DL-PRS received from a second TRP during a positioning session, wherein the first TRP is a reference TRP for the positioning session; and reporting, to a positioning entity via low layer signaling, a relative value of the at least one positioning measurement relative to an expected value of the at least one positioning measurement, wherein the relative value of the at least one positioning measurement is a difference between the expected value of the at least one positioning measurement and a measured value of the at least one positioning measurement, and wherein the expected value of the at least one positioning measurement comprises an expected reference signal time difference (RSTD) value for the first DL-PRS and the second DL-PRS. ### Claim 2 (depends on 1) The method of claim 1, wherein: the at least one positioning measurement comprises a time of arrival (ToA) measurement, the expected value of the at least one positioning measurement comprises an expected ToA value of the at least one DL-PRS. ### Claim 3 (depends on 2) The method of claim 2, wherein an absolute value of the at least one positioning measurement falls within a ToA uncertainty window. ### Claim 4 (depends on 1) The method of claim 1, wherein: the at least one positioning measurement comprises a reference signal time difference (RSTD) measurement between the first DL-PRS and the second DL-PRS. ### Claim 5 (depends on 4) The method of claim 4, wherein an absolute value of the at least one positioning measurement falls within an RSTD uncertainty window. ### Claim 6 (depends on 1) The method of claim 1, wherein: the at least one positioning measurement comprises a first ToA measurement of the first DL-PRS and a second ToA measurement of the second DL-PRS, and the expected value of the at least one positioning measurement comprises a first expected ToA value for the first DL-PRS and a second expected ToA value for the second DL-PRS. ### Claim 7 (depends on 6) The method of claim 6, wherein an absolute value of the first ToA measurement falls within a first ToA uncertainty window and an absolute value of the second ToA measurement falls within a second ToA uncertainty window. ### Claim 8 (depends on 1) The method of claim 1, wherein: the expected value of the at least one positioning measurement comprises an expected ToA value for the first DL-PRS. ### Claim 9 (depends on 8) The method of claim 8, further comprising: determining an expected ToA value for the second DL-PRS based on the expected ToA value for the first DL-PRS and the expected RSTD value for the first DL-PRS and the second DL-PRS. ### Claim 10 (depends on 1) The method of claim 1, wherein the low layer signaling comprises one or more medium access control control elements (MAC-CEs) or uplink control information (UCI). ### Claim 11 (depends on 1) The method of claim 1, wherein: the positioning entity comprises a location management component (LMC) associated with the at least one TRP, and the at least one TRP is a serving TRP. ### Claim 12 A user equipment (UE), comprising: a memory; at least one transceiver; and at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to: perform at least one positioning measurement of a first downlink positioning reference signal (DL-PRS) received from a first transmission-reception point (TRP) and a second DL-PRS received from a second TRP during a positioning session, wherein the first TRP is a reference TRP for the positioning session; and report, via the at least one transceiver, to a positioning entity via low layer signaling, a relative value of the at least one positioning measurement relative to an expected value of the at least one positioning measurement, wherein the relative value of the at least one positioning measurement is a difference between the expected value of the at least one positioning measurement and a measured value of the at least one positioning measurement, and wherein the expected value of the at least one positioning measurement comprises an expected reference signal time difference (RSTD) value for the first DL-PRS and the second DL-PRS. ### Claim 13 (depends on 12) The UE of claim 12, wherein: the at least one positioning measurement comprises a time of arrival (ToA) measurement, the expected value of the at least one positioning measurement comprises an expected ToA value of the at least one DL-PRS. ### Claim 14 (depends on 13) The UE of claim 13, wherein an absolute value of the at least one positioning measurement falls within a ToA uncertainty window. ### Claim 15 (depends on 12) The UE of claim 12, wherein: the at least one positioning measurement comprises a reference signal time difference (RSTD) measurement between the first DL-PRS and the second DL-PRS. ### Claim 16 (depends on 15) The UE of claim 15, wherein an absolute value of the at least one positioning measurement falls within an RSTD uncertainty window. ### Claim 17 (depends on 12) The UE of claim 12, wherein: the at least one positioning measurement comprises a first ToA measurement of the first DL-PRS and a second ToA measurement of the second DL-PRS, and the expected value of the at least one positioning measurement comprises a first expected ToA value for the first DL-PRS and a second expected ToA value for the second DL-PRS. ### Claim 18 (depends on 17) The UE of claim 17, wherein an absolute value of the first ToA measurement falls within a first ToA uncertainty window and an absolute value of the second ToA measurement falls within a second ToA uncertainty window. ### Claim 19 (depends on 12) The UE of claim 12, wherein: the expected value of the at least one positioning measurement comprises an expected ToA value for the first DL-PRS. ### Claim 20 (depends on 19) The UE of claim 19, wherein the at least one processor is further configured to: determine an expected ToA value for the second DL-PRS based on the expected ToA value for the first DL-PRS and the expected RSTD value for the first DL-PRS and the second DL-PRS. ### Claim 21 (depends on 12) The UE of claim 12, wherein the low layer signaling comprises one or more medium access control control elements (MAC-CEs) or uplink control information (UCI). ### Claim 22 (depends on 12) The UE of claim 12, wherein: the positioning entity comprises a location management component (LMC) associated with the at least one TRP, and the at least one TRP is a serving TRP. ### Claim 23 A user equipment (UE), comprising: means for performing at least one positioning measurement of a first downlink positioning reference signal (DL-PRS) received from a first transmission-reception point (TRP) and a second DL-PRS received from a second TRP during a positioning session, wherein the first TRP is a reference TRP for the positioning session; and means for reporting, to a positioning entity via low layer signaling, a relative value of the at least one positioning measurement relative to an expected value of the at least one positioning measurement, wherein the relative value of the at least one positioning measurement is a difference between the expected value of the at least one positioning measurement and a measured value of the at least one positioning measurement, and wherein the expected value of the at least one positioning measurement comprises an expected reference signal time difference (RSTD) value for the first DL-PRS and the second DL-PRS. ### Claim 24 A non-transitory computer-readable medium storing computer-executable instructions, which, when executed by a user equipment (UE), cause the UE to perform operations, the instructions comprising: at least one instruction to cause the UE to perform at least one positioning measurement of a first downlink positioning reference signal (DL-PRS) received from a first transmission-reception point (TRP) and a second DL-PRS received from a second TRP during a positioning session, wherein the first TRP is a reference TRP for the positioning session; and at least one instruction to cause the UE to report, to a positioning entity via low layer signaling, a relative value of the at least one positioning measurement relative to an expected value of the at least one positioning measurement, wherein the relative value of the at least one positioning measurement is a difference between the expected value of the at least one positioning measurement and a measured value of the at least one positioning measurement, and wherein the expected value of the at least one positioning measurement comprises an expected reference signal time difference (RSTD) value for the first DL-PRS and the second DL-PRS.