# US 10,873,830 B2 · Network architecture and methods for location services > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,830 B2 - Document ID: US10873830B2 - Status: Granted - Kind: B2 - Application number: 16/398,121 - Filed: 2019-04-29 - Published: 2019-08-22 - Granted: 2020-12-22 - Earliest claimed: 2014-08-01 - Assignees: Polte Corporation - Applicants: Polte Corporation - Inventors: Felix Markhovsky; Truman Prevatt; Russ Markhovsky; David Goodwin Shaw; Tyler Matthew Smith - Web page: https://patentgrep.com/patent/US10873830B2 ## CPC - H04W 4/029: Location-based management or tracking services - G01S 5/00: Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations {(using active systems G01S13/00, G01S15/00, G01S17/00)} - G01S 5/0273: {using multipath or indirect path propagation signals in position determination} - G01S 5/06: Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements (G01S5/12 takes precedence) - 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 5/12: by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial - H04B 17/27: for locating or positioning the transmitter - H04B 17/336: Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] - H04L 43/0864: Round trip delays - H04W 4/025: {using location based information parameters} - 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 - 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 UE location determined by collecting and preprocessing signal data at a detector and sending extracted data to a remote locate server. The detector buffers samples from signals provided by receive channels, detects known reference signals from receive channels based on reference signal parameters, isolates symbols carrying the reference signal from frames, extracts data from symbols, and sends extracted data to locate server. The locate server receives the extracted data, estimates locate observables based on the extracted data and calculates the UE location based on the estimated locate observables, the reference signal parameters and the extracted data. The detector and/or the server may also generate correlation coefficients between reference signals carrying spectrum received from a serving cell and utilize the correlation coefficients to cancel a serving cell signal in symbols that include known in advance reference signals from the serving cell and one or more neighboring cells of the wireless system. ## Claims ### Claim 1 A method for determining a location of a mobile wireless device in a wireless network system, the method comprising: buffering a plurality of samples in a digital format generated from signals received by or emitted from one or more antennas, antenna elements, antenna arrays and antenna array elements; receiving reference signal parameters that describe known in advance reference signals within the signals; detecting the known in advance reference signals from the signals based on the reference signal parameters; employing a multipath mitigation processor configured to process the detected reference signals, wherein the multipath mitigation processor utilizes a high-resolution spectrum estimation analysis to reduce spatial ambiguity associated with the detected reference signals, the high-resolution spectrum estimation including estimating a model size for a number of artificial frequency components of the detected reference signals; based on a distribution of a plurality of artificial frequencies of the artificial frequency components, calculating location observables of one or more of Time of Flight (TOF), Time of Arrival (TOA), Time Differences of Arrival (TDOA), and TDOA based on Angle of Arrival (AOA) information; and utilizing the location observables to calculate the location of the mobile wireless device. ### Claim 2 (depends on 1) The method of claim 1, wherein the one or more antennas, antenna elements, antenna arrays and antenna array elements is a single antenna of the mobile wireless device, wherein the detected reference signals are received from each antenna or antenna elements of a node within the wireless network system, and wherein the AOA is relative to a baseline of the antenna or antenna elements of the node. ### Claim 3 (depends on 1) The method of claim 1, wherein the one or more antennas, antenna elements, antenna arrays and antenna array elements are multiple antennas of the mobile wireless device, wherein the signals from the multiple antennas are combined to improve signal to noise ratio (SNR) or signal to interference plus noise ratio (SINR). ### Claim 4 (depends on 3) The method of claim 3, wherein utilizing the location observables is based on one or more of the shortest TOF, the SNR, the SNIR, antenna polarization; and the AOA information used in location consistency algorithms. ### Claim 5 (depends on 1) The method of claim 1, wherein the one or more antennas, antenna elements, antenna arrays and antenna array elements are multiple antennas of the mobile wireless device, wherein calculating includes calculating the location observables of TOF or TOA from each antenna among the multiple antennas. ### Claim 6 (depends on 1) The method of claim 1, wherein the one or more antennas, antenna elements, antenna arrays and antenna array elements are multiple antennas of the mobile wireless device, wherein calculating includes calculating the location observables of AOA from each antenna among the multiple antennas. ### Claim 7 (depends on 1) The method of claim 1, wherein the one or more antennas, antenna elements, antenna arrays and antenna array elements are multiple antennas of the mobile wireless device, wherein the AOA is relative to a baseline of the multiple antennas, wherein a direction of the baseline is measured or known in advance, and wherein the AOA information is used in location consistency algorithms. ### Claim 8 (depends on 1) The method of claim 1, wherein the TDOA based AOA information mitigates against a number of multipath components that can be resolved as a result of a limited number of antennas among the one or more antennas, antenna elements, antenna arrays and antenna array elements. ### Claim 9 (depends on 1) The method of claim 1, wherein the wireless network system is a Wi-Fi network and the mobile wireless device is Wi-Fi enabled. ### Claim 10 A method for determining a location of a mobile wireless device in a wireless network system, the method comprising: buffering a plurality of samples in a digital format generated from signals received by one or more antennas of the mobile wireless device or emitted from one or more antenna array elements of one or more nodes of the wireless network system; receiving reference signal parameters that describe known in advance reference signals within the signals; detecting the known in advance reference signals from the signals based on the reference signal parameters; employing a multipath mitigation processor configured to process the detected reference signals, wherein the multipath mitigation processor utilizes a high-resolution spectrum estimation analysis to reduce spatial ambiguity associated with the detected reference signals, the high-resolution spectrum estimation including estimating a model size for a number of artificial frequency components of the detected reference signals; based on a distribution of a plurality of artificial frequencies of the artificial frequency components, calculating location observables of one or more of Time of Flight (TOF), Time of Arrival (TOA), Time Differences of Arrival (TDOA), and TDOA based on Angle of Arrival (AOA) information; and utilizing the location observables to calculate the location of the mobile wireless device. ### Claim 11 (depends on 10) The method of claim 10, wherein the reference signal parameters include one or more of beam state information (BSI), a beam index (BI), a beam reference signal received power (BRSRP), and a carrier-to-interference and noise ratio (CINR). ### Claim 12 (depends on 10) The method of claim 10, wherein one or more of the antennas array elements are controllable or accessible. ### Claim 13 (depends on 12) The method of claim 12, further comprising of: utilizing a TDOA based AOA estimation process applied to a plurality of combinations of the one or more antenna array elements; and generating one or more azimuth and elevation AOA location observables estimates relative to one or more of the one or more antenna arrays elements' baseline direction or the one or more antennas' baseline direction. ### Claim 14 (depends on 12) The method of claim 12, wherein the reference signals include one or more of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), an Extended Synchronization Signal (ESS), a Phase Noise Compensation Reference Signal (DL PNCRS), a Channel-State Information Reference Signal (CSI-RS), a Beam Reference Signal (BRS), a Sounding Reference Signal (SRS), and a Demodulating Reference Signal (DMRS). ### Claim 15 (depends on 12) The method of claim 12, wherein the one or more nodes periodically transmit multiple beams at different angles, and wherein at the mobile wireless device the multiple beams are organized based on a best carrier-to-interference and noise ratio (CINR). ### Claim 16 (depends on 15) The method of claim 15, wherein the known in advance reference signals corresponding to each of the multiple beams are orthogonal. ### Claim 17 (depends on 15) The method of claim 15, wherein calculating location observables for the detected reference signals of each of the multiple beams includes estimating location observables of one or more of the TOF, the TOA and the TDOA. ### Claim 18 (depends on 17) The method of claim 17, further comprising applying a shortest TOF criterion to one or more candidate beams among the multiple beams to identify the one or more candidate beams closest to a direct path or a direct line of sight (DLOS) path. ### Claim 19 (depends on 17) The method of claim 17, further comprising: wherein calculating location observables includes selecting location observables based on one or more of a shortest TOF, a signal to noise ratio (SNR) and a signal to interference plus noise ratio (SINR); and wherein utilizing the location observables includes using the selected location observables in location consistency algorithms. ### Claim 20 (depends on 17) The method of claim 17, further comprising: utilizing beams parameters, including one or more of angular information, azimuth and elevation AOA observables, and beam-widths on a per beam basis to calculate the location observables. ### Claim 21 (depends on 17) The method of claim 17, utilizing one or more of a Round Time Trip (RTT) measurement from a base station among the one or more nodes to the mobile wireless device and receive-transmit timing difference (RTTD) information from the mobile wireless device to calculate the location observables. ### Claim 22 (depends on 21) The method of claim 21, wherein one or both of the RTT measurement and the RTTD information are utilized by location consistency algorithms, and wherein the calculated location of the mobile wireless device is within one or more of a RTT distance range that is based on the RTT measurement and a RTT standard deviation and a RTTD distance range that is based on then RTTD information and a RTTD standard deviation. ### Claim 23 (depends on 17) The method of claim 17, further comprising: utilizing known subsystem height and observables timing information of the one or more antenna array elements when utilizing the location observables to calculate the location of the mobile wireless device. ### Claim 24 (depends on 10) The method of claim 10, further comprising: determining a 2D location position of the mobile wireless device by utilizing signals from just the base station; and determining a 3D location position of the mobile wireless device by utilizing signals from two or more nodes among the one or more nodes. ### Claim 25 (depends on 10) The method of claim 10, wherein calculating location observables includes applying a data fusion process to PSS, SSS and ESS signals' contiguous resource allocation structure. ### Claim 26 (depends on 17) The method of claim 17, wherein the one or more nodes include two or more base stations, and wherein the calculated location of the mobile wireless device is near one or more Lines of Bearing (LOBs) defined by one or more TDOAs calculated from TOF or TOA observables.