# US 11,897,422 B2 · System and method for dynamic localization > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,897,422 B2 - Document ID: US11897422B2 - Status: Granted - Kind: B2 - Application number: 17/709,771 - Filed: 2022-03-31 - Published: 2022-10-06 - Granted: 2024-02-13 - Earliest claimed: 2021-03-31 - Assignees: DENSO International America, Inc.; Denso Corporation - Applicants: DENSO International America, Inc.; Denso Corporation - Inventors: Eric J. Smith - Web page: https://patentgrep.com/patent/US11897422B2 ## CPC - B60R 25/245: {where the antenna reception area plays a role} - H04B 17/27: for locating or positioning the transmitter - G07C 9/00309: {operated with bidirectional data transmission between data carrier and locks} - H01Q 1/3241: {particular used in keyless entry systems} - H01Q 21/30: Combinations of separate antenna units operating in different wavebands and connected to a common feeder system - H04B 17/221: {of receiver antennas, e.g. as to amplitude or phase} - H04W 4/023: {using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds} - H04W 4/025: {using location based information parameters} - H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P] - H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication - B60R 2325/101: Bluetooth® - B60R 2325/205: Mobile phones - G07C 2009/00769: {with data transmission performed by wireless means} - G07C 2209/63: Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle - G07C 2209/64: using a proximity sensor - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - H04B: TRANSMISSION - G07C: TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A system and method are provided for determining a location of a portable device relative to an object. The system and method may include operating in two modes: 1) a first mode in which an antenna output, such as a received signal strength indicator, satisfies a mode transition criterion that is dynamic, and 2) a second mode in which, with the mode transition criterion being satisfied, the location of the portable device is determined. ## Claims ### Claim 1 A system for establishing a location with respect to a portable device and an object, the system comprising: a plurality of antennas, each of the plurality of antennas configured to receive wireless communications and provide one or more antenna outputs corresponding to wireless communications; a controller capable of directing communications between a fixed position device and the portable device, the controller operable to direct a locator to determine the location of the portable device with respect to the object based on one or more first antenna outputs of the plurality of antenna outputs; and wherein the controller is configured, in response to one or more second antenna outputs of the plurality of antenna outputs satisfying a mode transition criterion, to direct the locator to determine the location of the portable device based on the one or more first antenna outputs, wherein the mode transition criterion is varied at a first rate that is less than a second rate for determining if the one or more second antenna outputs satisfies the mode transition criterion. ### Claim 2 (depends on 1) The system of claim 1 wherein the controller is configured to determine the mode transition criterion based on wireless communications with the portable device in accordance with a first communication protocol. ### Claim 3 (depends on 2) The system of claim 2 wherein: the controller is configured to determine calibration data based on wireless communications with the portable device in accordance with the first communication protocol; the controller is configured to vary the mode transition criterion based on a comparison between the one or more second antenna outputs and the calibration data; and the calibration data is indicative of first location information about the portable device relative to the object. ### Claim 4 (depends on 3) The system of claim 3 wherein the first location information is indicative of distance between the portable device and the object. ### Claim 5 (depends on 3) The system of claim 3 wherein the one or more second antenna outputs are indicative of second location information about the portable device relative to the object. ### Claim 6 (depends on 5) The system of claim 5 wherein the mode transition criterion is varied based on a comparison of the first location information and the second location information. ### Claim 7 (depends on 2) The system of claim 2 wherein the controller is configured to determine if the one or more second antenna outputs satisfy the mode transition criterion based on wireless communications with the portable device in accordance with a second communication protocol. ### Claim 8 (depends on 7) The system of claim 7 wherein the first communication protocol is ultra-wide band or BLE CS/HADM, and the second communication protocol is Bluetooth Low Energy. ### Claim 9 (depends on 1) The system of claim 1 wherein the controller is configured to determine the mode transition criterion based on wireless communications with the portable device in accordance with a first communication protocol. ### Claim 10 A method of determining a location of a portable device with respect to an object, said method comprising: receiving first wireless communications in a first antenna; providing a first antenna output based on the first wireless communications; varying a mode transition criterion based on the first antenna output; receiving second wireless communications in a second antenna; providing a second antenna output based on the second wireless communications; determining if the second antenna output satisfies the mode transition criterion; varying the mode transition criterion at a first rate that is less than a second rate for determining if the second antenna output satisfies the mode transition criterion; and based on a determination that the second antenna output satisfies the mode transition criterion, determining the location of the portable device with respect to the object based on wireless communications. ### Claim 11 (depends on 10) The method of claim 10 wherein the first wireless communications are communicated in accordance with a first type of protocol, and wherein the second wireless communications are communicated in accordance with a second type of protocol. ### Claim 12 (depends on 11) The method of claim 11 wherein the location of the portable device with respect to the object is determined based on wireless communications of the first type of protocol. ### Claim 13 (depends on 10) The method of claim 10 comprising determining the location of the portable device with respect to the object based on the wireless communications at a third rate that is greater than the first rate, and wherein the wireless communications and the first wireless communications correspond to a first type of communications protocol different from a second type of communications protocol associated with the second wireless communications. ### Claim 14 (depends on 10) The method of claim 10 wherein: the wireless communications and the first wireless communications correspond to a first type of communications protocol different from a second type of communications protocol associated with the second wireless communications; the first type of communications protocol is ultra-wide band or BLE CS/HADM; and the second type of communications protocol is Bluetooth low energy. ### Claim 15 (depends on 10) The method of claim 10 wherein the first antenna output is one of a time of flight characteristic, an AoA characteristic, a phase-based distance characteristic, a round-trip timing characteristic, a first path power, or a link quality characteristic corresponding to the first wireless communications. ### Claim 16 (depends on 10) The method of claim 10 wherein the second antenna output is one of a signal strength characteristic or an AoA characteristic corresponding to the second wireless communications. ### Claim 17 (depends on 16) The method of claim 16 wherein the mode transition criterion includes a distance threshold, and wherein determining if the second antenna output satisfies the mode transition criterion includes determining if a determined distance is less than the distance threshold. ### Claim 18 (depends on 17) The method of claim 17 wherein the signal strength threshold is varied based on a) a distance determination corresponding to the first antenna output and b) a sample signal strength characteristic that is associated with the second antenna output and obtained temporally proximate to the first antenna output. ### Claim 19 (depends on 18) The method of claim 18 comprising providing the distance determination for calibration with respect to the sample signal strength characteristic, and wherein the signal strength threshold corresponds to a threshold distance associated with a calibrated form of the sample signal strength characteristic. ### Claim 20 A system for determining a location of a portable device with respect to an object, said system comprising: a plurality of antennas, each of the plurality of antennas configured to receive wireless communications and provide one or more antenna outputs corresponding to wireless communications; a control system operable to transition from a first locator mode to a second locator mode based on a first antenna output of the plurality of antenna outputs; wherein the control system is configured to vary a mode transition criterion based on a second antenna output of the plurality of antenna outputs; wherein the control system is operable to transition from the first locator mode to the second locator mode based on the first antenna output satisfying the mode transition criterion; wherein the control system is configured to vary the mode transition criterion at a first rate that is less than a second rate for determining if the first antenna output satisfies the mode transition criterion. ### Claim 21 A system for establishing a location with respect to a portable device and an object, the system comprising: a plurality of antennas, each of the plurality of antennas configured to receive wireless communications and provide one or more antenna outputs corresponding to wireless communications; a controller capable of directing communications between a fixed position device and the portable device, the controller operable to direct a locator to determine the location of the portable device with respect to the object based on one or more first antenna outputs of the plurality of antenna outputs; the controller is configured to determine calibration data based on one or more second antenna outputs of the plurality of antenna outputs, the controller is configured to vary the locator based on the calibration data; and wherein the controller is configured, in response to the one or more second antenna outputs of the plurality of antenna outputs satisfying a mode transition criterion, to direct the locator to determine the location of the portable device based on the one or more first antenna outputs, wherein the mode transition criterion is varied at a first rate that is less than a second rate for determining if the one or more second antenna outputs satisfies the mode transition criterion. ### Claim 22 (depends on 21) The system of claim 21 wherein the calibration data is indicative of location information about the portable device relative to the object.