# US 2021/0241561 A1 · Systems and methods for trajectory prediction to enable seamless access using mobile devices > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0241561 A1 - Document ID: US20210241561A1 - Status: Published application - Kind: A1 - Application number: 17/049,890 - Filed: 2019-04-23 - Published: 2021-08-05 - Earliest claimed: 2018-04-25 - Assignees: Carrier Corporation - Applicants: Carrier Corporation - Inventors: Kunal Srivastava; Pedro Fernandez-Orellana; Ankit Tiwari - Web page: https://patentgrep.com/patent/US20210241561A1 ## CPC - G01C 21/206: {specially adapted for indoor navigation} - G07C 9/28: the pass enabling tracking or indicating presence - G07C 9/00309: {operated with bidirectional data transmission between data carrier and locks} - G07C 9/29: the pass containing active electronic elements, e.g. smartcards - H04W 4/023: {using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds} - H04W 4/026: {using orientation information, e.g. compass} - H04W 4/029: Location-based management or tracking services - H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication - 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 - G01C: MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY (measuring liquid level G01F; radio navigation, determining distance or velocity by use of propagation effects, e.g. Doppler effects, propagation time, of radio waves, analogous arrangements using other waves G01S) - 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 - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method of determining a destination of an individual carrying a mobile device including: detecting a first sequence of signal strengths between a mobile device and one or more access controls over a first time period; detecting an access request from the mobile device to a final destination access control of the one or more access controls along a first route when the first time period has expired; associating the first sequence of signal strengths over the first time period with the first route to the final destination access control; detecting a second sequence of signal strengths between the mobile device and one or more access controls over a second time period; and determining that the second sequence of signal strength correlates with the first sequence of signal strengths and that the mobile device is on the first route to the final destination access control during the second time period. ## Claims ### Claim 1 A method of determining a destination of an individual carrying a mobile device, the method comprising: detecting a first sequence of signal strengths between a mobile device and one or more access controls over a first time period; detecting an access request from the mobile device to a final destination access control of the one or more access controls along a first route when the first time period has expired; associating the first sequence of signal strengths over the first time period with the first route to the final destination access control; detecting a second sequence of signal strengths between the mobile device and one or more access controls over a second time period; and determining that the second sequence of signal strength correlates with the first sequence of signal strengths and that the mobile device is on the first route to the final destination access control during the second time period. ### Claim 2 (depends on 1) The method of claim 1, further comprising: determining a predicted time of arrival of the mobile device at the final destination access control; and scheduling the final destination access control to actuate at the predicted time of arrival. ### Claim 3 (depends on 2) The method of claim 2, further comprising: actuating the access control at the predicated time of arrival. ### Claim 4 (depends on 2) The method of claim 2, further comprising: determining a distance between the mobile device and the final destination access control; and actuating the final destination access control when the distance between the mobile device and the final destination access control is within a selected range. ### Claim 5 (depends on 2) The method of claim 2, further comprising: determining a distance between the mobile device and the final destination access control; and actuating the final destination access control at the predicated time of arrival if the distance between the mobile device and the final destination access control is within a selected range. ### Claim 6 (depends on 1) The method of claim 1, further comprising: detecting an activity of an individual carrying the mobile device at first instance during the first sequence of signal strengths; detecting the activity of an individual carrying the mobile device at second instance during the second sequence of signal strengths; determining that the second instance during the second sequence of signal strengths occurs at a chronological point about equal to first instance during the first sequence of signal strengths; and confirming that the second sequence of signal strength correlates with the first sequence of signal strengths and that the mobile device is on the first route to the final destination access control. ### Claim 7 (depends on 1) The method of claim 1, wherein each of the one or more access controls are configured to advertise a wireless signal and the mobile device is configured to detect the signal strength of the wireless signal. ### Claim 8 (depends on 1) The method of claim 1, wherein the mobile device is configured to advertise a wireless signal and each of the one or more of access controls are configured to detect the signal strength of the wireless signal. ### Claim 9 (depends on 7) The method of claim 7, wherein the wireless signal is Bluetooth. ### Claim 10 (depends on 1) The method of claim 1, wherein the final destination access control of the one or more access controls is a predicted final destination access control. ### Claim 11 A computer program product tangibly embodied on a computer readable medium, the computer program product including instructions that, when executed by a processor, cause the processor to perform operations comprising: detecting a first sequence of signal strengths between a mobile device and one or more access controls over a first time period; detecting an access request from the mobile device to a final destination access control of the one or more access controls on along a first route when the first time period has expired; associating the first sequence of signal strengths over the first time period with the first route to the final destination access control; detecting a second sequence of signal strengths between the mobile device and one or more access controls over a second time period; and determining that the second sequence of signal strength correlates with the first sequence of signal strengths and that the mobile device is on the first route to the final destination access control during the second time period. ### Claim 12 (depends on 11) The computer program product of claim 11, wherein the operations further comprise: determining a predicted time of arrival of the mobile device at the final destination access control; and scheduling the final destination access control to actuate at the predicted time of arrival. ### Claim 13 (depends on 12) The computer program product of claim 12, wherein the operations further comprise: actuating the access control at the predicated time of arrival. ### Claim 14 (depends on 12) The computer program product of claim 12, wherein the operations further comprise: determining a distance between the mobile device and the final destination access control; and actuating the final destination access control when the distance between the mobile device and the final destination access control is within a selected range. ### Claim 15 (depends on 12) The computer program product of claim 12, wherein the operations further comprise: determining a distance between the mobile device and the final destination access control; and actuating the final destination access control at the predicated time of arrival if the distance between the mobile device and the final destination access control is within a selected range. ### Claim 16 (depends on 11) The computer program product of claim 11, wherein the operations further comprise: detecting an activity of an individual carrying the mobile device at first instance during the first sequence of signal strengths; detecting the activity of an individual carrying the mobile device at second instance during the second sequence of signal strengths; determining that the second instance during the second sequence of signal strengths occurs at a chronological point about equal to first instance during the first sequence of signal strengths; and confirming that the second sequence of signal strength correlates with the first sequence of signal strengths and that the mobile device is on the first route to the final destination access control. ### Claim 17 (depends on 11) The computer program product of claim 11, wherein each of the one or more access controls are configured to advertise a wireless signal and the mobile device is configured to detect the signal strength of the wireless signal. ### Claim 18 (depends on 11) The computer program product of claim 11, wherein the mobile device is configured to advertise a wireless signal and each of the one or more of access controls are configured to detect the signal strength of the wireless signal. ### Claim 19 (depends on 17) The computer program product of claim 17, wherein the wireless signal is Bluetooth.