# US 10,484,959 B2 · Positioning techniques in wireless communication systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,484,959 B2 - Document ID: US10484959B2 - Status: Granted - Kind: B2 - Application number: 15/985,061 - Filed: 2018-05-21 - Published: 2019-01-31 - Granted: 2019-11-19 - Earliest claimed: 2017-07-31 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Chih-Hao Liu; Srinivas Yerramalli; Tamer Kadous - Web page: https://patentgrep.com/patent/US10484959B2 ## CPC - H04W 64/003: {locating network equipment} - G01S 1/00: Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith (position fixing by co-ordinating a plurality of determinations of direction or position lines G01S5/00) - G01S 1/20: using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems - G01S 5/0036: {of measured values, i.e. measurement on mobile and position calculation on base station} - 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}) - H04B 1/7143: Arrangements for generation of hop patterns - H04L 5/0012: {Hopping in multicarrier systems} - 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 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04W 48/16: Discovering, processing access restriction or access information - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - 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 Methods, systems, and devices for wireless communication that support positioning techniques are described. One method may include receiving a positioning reference signal (PRS) configuration; receiving a plurality of PRS transmissions over a shared radio frequency spectrum from a plurality of base stations; and transmitting a measurement report of the PRS transmissions. The PRS transmissions may be received according to the PRS configuration. Another method may include receiving a discovery reference signal (DRS) transmission from a first base station; decoding a cell identifier of the first base station based on the DRS transmission; determining timing information of the first base station based on the DRS transmission; and transmitting a measurement report of the DRS transmission to a second base station. ## Claims ### Claim 1 A method for wireless communication at a user equipment (UE), comprising: receiving, from a serving cell, a positioning reference signal (PRS) configuration, the PRS configuration comprising a set of hopping frequencies for a plurality of PRS transmissions including at least one hopping frequency within a non-anchor frequency range; receiving, from a non-serving cell, at least one of the plurality of PRS transmissions over the at least one hopping frequency within the non-anchor frequency range of a shared radio frequency spectrum, wherein the plurality of PRS transmissions are received according to the PRS configuration; and transmitting a measurement report of the plurality of PRS transmissions. ### Claim 2 (depends on 1) The method of claim 1, wherein receiving the plurality of PRS transmissions comprises: receiving at least one PRS transmission during a PRS occasion comprising a plurality of repetitions of PRS subframes. ### Claim 3 (depends on 2) The method of claim 2, further comprising: performing combining of the plurality of repetitions of PRS subframes within the PRS occasion; and detecting a transmission and estimating a delay jointly based at least in part on the combining. ### Claim 4 (depends on 1) The method of claim 1, wherein receiving the PRS configuration comprises: receiving a plurality of cell identifiers associated with a plurality of base stations including the serving cell and the non-serving cell. ### Claim 5 (depends on 4) The method of claim 4, further comprising: determining a pseudo random hopping pattern of each base station of the plurality of base stations based at least in part on a received cell identifier of each of the plurality of base stations, wherein the at least one of the plurality of PRS transmissions is received in accordance with the determined pseudo random hopping pattern of the non-serving cell. ### Claim 6 (depends on 1) The method of claim 1, wherein receiving the PRS configuration comprises: receiving at least one of: a PRS periodicity, a PRS duration, or a time offset associated with one or more of a plurality of base stations. ### Claim 7 (depends on 6) The method of claim 6, wherein the PRS periodicity is greater than a hopping frame periodicity of a plurality of base stations. ### Claim 8 (depends on 1) The method of claim 1, wherein receiving the plurality of PRS transmissions comprises: tuning away from the serving cell during a measurement gap associated with measuring at least one of the PRS transmissions. ### Claim 9 (depends on 1) The method of claim 1, wherein receiving the at least one of the plurality of PRS transmissions comprises: receiving all PRS transmissions from a plurality of base stations including the non-serving cell on non-anchor hopping frequencies of the set of hopping frequencies in the non-anchor frequency range. ### Claim 10 (depends on 1) The method of claim 1, further comprising: receiving at least one of the plurality of PRS transmissions from the serving cell on an anchor hopping frequency of the set of hopping frequencies. ### Claim 11 (depends on 1) The method of claim 1, further comprising: receiving at least one of the plurality of PRS transmissions immediately before or after a serving cell transmission on a non-anchor hopping frequency of the set of hopping frequencies in the non-anchor frequency range. ### Claim 12 (depends on 1) The method of claim 1, further comprising: receiving at least one of the plurality of PRS transmissions from multiple ones of a plurality of base stations including the serving cell during a same set of one or more subframes of an anchor hopping frequency of the set of hopping frequencies. ### Claim 13 (depends on 1) The method of claim 1, wherein the non-serving cell comprises a dedicated reference signal base station. ### Claim 14 A method for wireless communication at a base station, comprising: transmitting a positioning reference signal (PRS) configuration to a user equipment (UE), the PRS configuration comprising a set of hopping frequencies for a plurality of PRS transmissions including at least one hopping frequency within a non-anchor frequency range; transmitting at least one of the plurality of PRS transmissions over the at least one hopping frequency within the non-anchor frequency range of a shared radio frequency spectrum, wherein at least one of the plurality of PRS transmissions is transmitted according to the PRS configuration; and receiving a measurement report of the plurality of PRS transmissions from the UE. ### Claim 15 (depends on 14) The method of claim 14, wherein transmitting the PRS configuration comprises: transmitting a cell identifier associated with the base station. ### Claim 16 (depends on 14) The method of claim 14, wherein transmitting the PRS configuration comprises: transmitting at least one of: a PRS periodicity, a PRS duration, or a time offset. ### Claim 17 (depends on 14) The method of claim 14, wherein the base station is a serving cell. ### Claim 18 (depends on 14) The method of claim 14, wherein the base station is a dedicated reference signal base station. ### Claim 19 (depends on 14) The method of claim 14, wherein transmitting the at least one of the plurality of PRS transmissions comprises: transmitting all PRS transmissions on non-anchor hopping frequencies of the set of hopping frequencies in the non-anchor frequency range. ### Claim 20 (depends on 14) The method of claim 14, further comprising: transmitting at least one of the plurality of PRS transmissions on an anchor hopping frequency of the set of hopping frequencies. ### Claim 21 An apparatus for wireless communication, comprising: a processor; memory in electronic communication with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to: receive, from a serving cell, a positioning reference signal (PRS) configuration, the PRS configuration comprising a set of hopping frequencies for a plurality of PRS transmissions including at least one hopping frequency within a non-anchor frequency range; receive, from a non-serving cell, at least one of the plurality of PRS transmissions over the at least one hopping frequency within the non-anchor frequency range of a shared radio frequency spectrum, wherein the plurality of PRS transmissions are received according to the PRS configuration; and transmit a measurement report of the plurality of PRS transmissions. ### Claim 22 (depends on 21) The apparatus of claim 21, wherein the instructions to receive the plurality of PRS transmissions comprise instructions executable by the processor to: receive at least one PRS transmission during a PRS occasion comprising a plurality of repetitions of PRS subframes. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein the instructions are further executable by the processor to: perform combining of the plurality of repetitions of PRS subframes within the PRS occasion; and detect a transmission and estimate a delay jointly based at least in part on the combining. ### Claim 24 An apparatus for wireless communication, comprising: a processor; memory in electronic communication with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to: transmit a positioning reference signal (PRS) configuration to a user equipment (UE), the PRS configuration comprising a set of hopping frequencies for a plurality of PRS transmissions including at least one hopping frequency within a non-anchor frequency range; transmit at least one of the plurality of PRS transmissions over the at least one hopping frequency within the non-anchor frequency range of a shared radio frequency spectrum, wherein the plurality of PRS transmissions are transmitted according to the PRS configuration; and receive a measurement report of the plurality of PRS transmissions from the UE. ### Claim 25 (depends on 24) The apparatus of claim 24, wherein the instructions to transmit the PRS configuration comprise instructions executable by the processor to: transmit a cell identifier associated with a base station.