# US 11,743,846 B2 · Sounding signals for sub-meter base station localization > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,743,846 B2 - Document ID: US11743846B2 - Status: Granted - Kind: B2 - Application number: 17/323,772 - Filed: 2021-05-18 - Published: 2021-11-18 - Granted: 2023-08-29 - Earliest claimed: 2020-05-18 - Assignees: Parallel Wireless, Inc.; PhasorLab, Inc. - Applicants: Parallel Wireless, Inc.; PhasorLab, Inc. - Inventors: Ramesh Annavajjala; Efi Dror; Steven Paul Papa; Joshua C. Park; Soumendra Nanda; Prashanth Rao - Web page: https://patentgrep.com/patent/US11743846B2 ## CPC - H04W 56/001: {Synchronization between nodes} - G01S 5/02216: {Timing or synchronisation of the receivers} - 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 16/32: Hierarchical cell structures - H04W 48/16: Discovering, processing access restriction or access information - H04W 88/16: Gateway arrangements - G01S 5/0221: {Receivers} - G01S 5/06: Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements (G01S5/12 takes precedence) - H04W 84/12: WLAN [Wireless Local Area Networks] - 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 Systems and methods are disclosed for providing base station localization. In one embodiment the system includes a network including a base station such as a 5G gNodeB (gNB); a Hetnet Gateway (HNG) in communication with the gNB, wherein the HNG includes a location server and wherein the HNG virtualizes and abstracts a collection of base stations and provides a complex network under its purview as a simple base station to a mobile packet core network; a plurality of Hyper Sync Network (HSN) nodes in communication with the gNB and the HNG, wherein the plurality of HSN nodes listen to User Equipments (UEs) to locate the UEs and to synchronize clocks on the gNB with the collection of HSN nodes or other gNBs; and an Evolved Serving Mobile Location Center (E-SMLC) server in communication with the HNG and for reporting the location of a UE. ## Claims ### Claim 1 A system providing base station localization, comprising; a network including a base station; a Hetnet Gateway (HNG) in communication with the base station, wherein the HNG includes a location server and wherein the HNG virtualizes and abstracts a collection of base stations and provides a complex network under its purview as a simple base station to a mobile packet core network; a plurality of Hyper Sync Network (HSN) nodes in communication with the base station and the HNG, wherein the plurality of HSN nodes listen to User Equipments (UEs) to locate the UEs and to synchronize clocks on the base station with the collection of HSN nodes or other base stations; and an Evolved Serving Mobile Location Center (E-SMLC) server in communication with the HNG and for reporting the location of a UE. ### Claim 2 (depends on 1) The system of claim 1 wherein the base station comprises a one of a 4G eNodeB and a 5G gNodeB (gNB). ### Claim 3 (depends on 1) The system of claim 1 wherein the HNG hosts location based services intelligence and algorithms. ### Claim 4 (depends on 1) The system of claim 1 wherein the network keeps clocks on the base station and HSN nodes synchronized using a wireless channel. ### Claim 5 (depends on 1) The system of claim 1 wherein the HNG issues instructions to the base station to schedule a Sounding Reference Signal (SRS) transmission for the UE of interest. ### Claim 6 (depends on 5) The system of claim 5 wherein the HSN nodes listen to the SRS transmission and estimate a delay in receiving the signal against a common reference of time. ### Claim 7 (depends on 6) The system of claim 6 wherein the HSN nodes report the delay as metadata to the HNG. ### Claim 8 (depends on 7) The system of claim 7 wherein the HNG pinpoints the location of the UE and conveys this information to the E-SMLC as a location relative to the base station's location. ### Claim 9 (depends on 1) The system of claim 1 wherein the HSN node comprises a listen only base station for maintaining time synchronization and an arrival time of UE signals. ### Claim 10 A method for providing base station localization, the method comprising; receiving, at a Hetnet Gateway (HNG) from an Evolved Serving Mobile Location Center (E-SMLC) server located in a network, a request for a location of a User Equipment (UE); issuing, by the HNG to a base station, instructions to schedule a Sounding Reference Signal (SRS) transmission for the UE; issuing, by the HNG, instructions to a plurality of Hyper Sync Network (HSN) nodes to listen for the SRS transmission from the UE; transmitting, by the UE at an appointed time, the SRS transmission; listening, by the HSN nodes, for the SRS transmission and estimating a delay in receiving the transmission against a reference time; reporting, by the HSN nodes, the delay as metadata to the HNG; determining, by the HNG from the metadata, a location of the UE relative a location of the base station; and reporting, by the e-SMLC, the location of the UE. ### Claim 11 (depends on 10) The method of claim 10 wherein the base station comprises a one of a 4G eNodeB and a 5G gNodeB (gNB). ### Claim 12 (depends on 10) The method of claim 10 further comprising hosting, by the HNG, location based services intelligence and algorithms. ### Claim 13 (depends on 10) The method of claim 10 further comprising keeping clocks on the base station and HSN nodes synchronized using a wireless channel. ### Claim 14 (depends on 10) The method of claim 10 wherein the HSN node comprises a listen only base station for maintaining time synchronization and an arrival time of UE signals. ### Claim 15 A non-transitory computer-readable media containing instructions for providing base station localization which, when executed, cause a system to perform steps comprising: receiving, at a Hetnet Gateway (HNG) from an Evolved Serving Mobile Location Center (E-SMLC) server located in a network, a request for a location of a User Equipment (UE); issuing, by the HNG to a base station instructions to schedule a Sounding Reference Signal (SRS) transmission for the UE; issuing, by the HNG, instructions to a plurality of Hyper Sync Network (HSN) nodes to listen for the SRS transmission from the UE; transmitting, by the UE at an appointed time, the SRS transmission; listening, by the HSN nodes, for the SRS transmission and estimating a delay in receiving the transmission against a reference time; reporting, by the HSN nodes, the delay as metadata to the HNG; determining, by the HNG from the metadata, a location of the UE relative a location of the base station; and reporting, by the e-SMLC, the location of the UE. ### Claim 16 (depends on 15) The computer readable media of claim 15 further comprising instructions wherein the base station comprises a one of a 4G eNodeB and a 5G gNodeB (gNB). ### Claim 17 (depends on 15) The computer-readable media of claim 15 further comprising instructions for hosting, by the HNG, location based services intelligence and algorithms. ### Claim 18 (depends on 15) The computer-readable media of claim 15 further comprising instructions for keeping clocks on the gNB and HSN nodes synchronized using a wireless channel. ### Claim 19 (depends on 15) The computer-readable media of claim 15 further comprising instructions wherein the HSN node comprises a listen only base station for maintaining time synchronization and an arrival time of UE signals.