Patents by Inventor Tarun Kumar Bhattacharya
Tarun Kumar Bhattacharya has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9844019Abstract: A technique for estimating the location of a wireless terminal at an unknown location in a geographic region is disclosed. The technique is based on the recognition that there are location-dependent traits of electromagnetic signals. In environments where multiple antennas are radiating the same signal, as in the case of distributed antennas or host-repeater configurations, one or more possible locations of the wireless terminal can be designated as improbable based on i) a measure of the propagation delay of a signal traveling between a) a base station and b) the wireless terminal or an infrastructure antenna, or ii) the maximum distance at which a signal is detectable by the wireless terminal. Additionally, the applicable set of values for the location-dependent traits is selected based on similar criteria.Type: GrantFiled: August 12, 2014Date of Patent: December 12, 2017Assignee: Polaris Wireless, Inc.Inventors: Tarun Kumar Bhattacharya, David Stevenson Spain, Jr., Hassan Mohamed El-Sallabi, Robert Lewis Martin
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Patent number: 9538328Abstract: A method and apparatus are disclosed for estimating whether or not a wireless terminal is in a geographic zone. The illustrative embodiment employs a pattern classifier that is trained on traits of electromagnetic signals at various locations. A computer-executable program is then generated based on the trained pattern classifier, and the program is installed and executed on a subscribed identity module of the terminal.Type: GrantFiled: December 11, 2015Date of Patent: January 3, 2017Assignee: Polaris Wireless, Inc.Inventors: Tarun Kumar Bhattacharya, Martin Feuerstein, Scot Douglas Gordon
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Patent number: 9398402Abstract: An apparatus and method are disclosed for tracking a large number of wireless terminals and for estimating the location of the terminals at each instant. Some embodiments of the present invention use a wide variety of factors to determine the order and frequency with which each wireless terminal is located. These factors include, but are not limited to, the history of the location of the wireless terminal, the time of day, and the weather.Type: GrantFiled: September 19, 2011Date of Patent: July 19, 2016Assignee: Polaris Wireless, Inc.Inventors: Ankit Bansal, Tarun Kumar Bhattacharya, Martin Feuerstein, Scot Douglas Gordon, Robert Lewis Martin, David Stevenson Spain, Jr.
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Patent number: 9247516Abstract: A method and apparatus are disclosed for estimating whether or not a wireless terminal is in a geographic zone. The illustrative embodiment employs a pattern classifier that is trained on traits of electromagnetic signals at various locations. A computer-executable program is then generated based on the trained pattern classifier, and the program is installed and executed on a subscribed identity module of the terminal.Type: GrantFiled: August 23, 2007Date of Patent: January 26, 2016Assignee: Polaris Wireless, Inc.Inventors: Tarun Kumar Bhattacharya, Martin Feuerstein, Scot Douglas Gordon
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Patent number: 8965393Abstract: A method of using a non-GPS-derived technique to estimate the location of an Assisted-GPS-enabled wireless terminal for the purposes of generating location-specific assistance data for the wireless terminal is disclosed. The wireless terminal then uses the assistance data to acquire and process one or more GPS signals and to derive information that is probative of the wireless terminal's location. The GPS-derived location information is then combined with non-GPS-derived location to form an estimate of the location of the wireless terminal that is better than can be derived from either alone. This combination of GPS-derived and non-GPS techniques is particularly useful when the wireless terminal can only acquire one or two GPS signals because it is not possible to determine the location of the wireless terminal with only two GPS signals alone.Type: GrantFiled: May 22, 2006Date of Patent: February 24, 2015Assignee: Polaris Wireless, Inc.Inventor: Tarun Kumar Bhattacharya
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Patent number: 8886228Abstract: A system and method are disclosed for triggering location estimation of mobile stations in a geographic region of interest. The disclosed system includes a list of International Mobile Subscriber Identities (“IMSI”) used to track which mobile stations are to have location estimates generated, a database of Network Measurement Reports (“NMR”) used for generating the location estimates, and a location engine. The system operates as a group of concurrently executing processes that i) process IMSIs and NMRs that are extracted by and received from probes that monitor communication links; ii) generate location estimates of mobile stations in the region of interest, based on a sequential indexing of the IMSI list; iii) maintain the freshness of the NMR database; and iv) maintain the freshness of the IMSI list. These processes operate such that the triggering of the location estimations occurs asynchronously with respect to the detection of information on the communication links.Type: GrantFiled: November 15, 2013Date of Patent: November 11, 2014Assignee: Polaris Wireless, Inc.Inventors: Tarun Kumar Bhattacharya, Mahesh B. Patel
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Patent number: 8838137Abstract: A technique for estimating the location of a wireless terminal at an unknown location in a geographic region is disclosed. The technique is based on the recognition that there are location-dependent traits of electromagnetic signals. In environments where multiple antennas are radiating the same signal, as in the case of distributed antennas or host-repeater configurations, one or more possible locations of the wireless terminal can be designated as improbable based on i) a measure of the propagation delay of a signal traveling between a) a base station and b) the wireless terminal or an infrastructure antenna, or ii) the maximum distance at which a signal is detectable by the wireless terminal. Additionally, the applicable set of values for the location-dependent traits is selected based on similar criteria.Type: GrantFiled: August 30, 2012Date of Patent: September 16, 2014Assignee: Polaris Wireless, Inc.Inventors: Tarun Kumar Bhattacharya, David Stevenson Spain, Jr., Hassan Mohamed El-Sallabi, Robert Lewis Martin
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Publication number: 20140066088Abstract: A technique for estimating the location of a wireless terminal at an unknown location in a geographic region is disclosed. The technique is based on the recognition that there are location-dependent traits of electromagnetic signals. In environments where multiple antennas are radiating the same signal, as in the case of distributed antennas or host-repeater configurations, one or more possible locations of the wireless terminal can be designated as improbable based on i) a measure of the propagation delay of a signal traveling between a) a base station and b) the wireless terminal or an infrastructure antenna, or ii) the maximum distance at which a signal is detectable by the wireless terminal. Additionally, the applicable set of values for the location-dependent traits is selected based on similar criteria.Type: ApplicationFiled: August 30, 2012Publication date: March 6, 2014Applicant: POLARIS WIRELESS, INC.Inventors: Tarun Kumar Bhattacharya, David Stevenson Spain, JR., Hassan Mohamed El-Sallabi, Robert Lewis Martin
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Patent number: 8588822Abstract: A system and method are disclosed for triggering location estimation of mobile stations in a geographic region of interest. The disclosed system includes a list of International Mobile Subscriber Identities (“IMSI”) used to track which mobile stations are to have location estimates generated, a database of Network Measurement Reports (“NMR”) used for generating the location estimates, and a location engine. The system operates as a group of concurrently executing processes that i) process IMSIs and NMRs that are extracted by and received from probes that monitor communication links; ii) generate location estimates of mobile stations in the region of interest, based on a sequential indexing of the IMSI list; iii) maintain the freshness of the NMR database; and iv) maintain the freshness of the IMSI list. These processes operate such that the triggering of the location estimations occurs asynchronously with respect to the detection of information on the communication links.Type: GrantFiled: January 11, 2013Date of Patent: November 19, 2013Assignee: Polaris Wireless, Inc.Inventors: Tarun Kumar Bhattacharya, Mahesh B. Patel
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Patent number: 8583141Abstract: A technique for estimating the location of a wireless terminal at an unknown location in a geographic region is disclosed. The technique is based on the recognition that there are traits of electromagnetic signals that are dependent on topography, the receiver, the location of the transmitter, and other factors. For example, if a particular radio station is known to be received strongly at a first location and weakly at a second location, and a given wireless terminal at an unknown location is receiving the radio station weakly, it is more likely that the wireless terminal is at the second location than at the first location.Type: GrantFiled: June 7, 2010Date of Patent: November 12, 2013Assignee: Polaris Wireless, Inc.Inventors: Tarun Kumar Bhattacharya, Martin Feuerstein, Scot Douglas Gordon, David Stevenson Spain, Jr.
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Patent number: 8571577Abstract: A technique for estimating the location of a wireless terminal at an unknown location in a geographic region is disclosed. The technique is based on the recognition that there are traits of electromagnetic signals that are dependent on topography, the receiver, the location of the transmitter, and other factors. For example, if a particular radio station is known to be received strongly at a first location and weakly at a second location, and a given wireless terminal at an unknown location is receiving the radio station weakly, it is more likely that the wireless terminal is at the second location than at the first location.Type: GrantFiled: July 18, 2012Date of Patent: October 29, 2013Assignee: Polaris Wireless, Inc.Inventors: Tarun Kumar Bhattacharya, Martin Feuerstein, Scot Douglas Gordon, David Stevenson Spain, Jr.
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Patent number: 8565786Abstract: A technique for estimating the location of a wireless terminal at an unknown location in a geographic region is disclosed. The technique is based on the recognition that there are traits of electromagnetic signals that are dependent on topography, the receiver, the location of the transmitter, and other factors. For example, if a particular radio station is known to be received strongly at a first location and weakly at a second location, and a given wireless terminal at an unknown location is receiving the radio station weakly, it is more likely that the wireless terminal is at the second location than at the first location.Type: GrantFiled: July 18, 2012Date of Patent: October 22, 2013Assignee: Polaris Wireless, Inc.Inventors: Tarun Kumar Bhattacharya, Martin Feuerstein, Scot Douglas Gordon, David Stevenson Spain, Jr.
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Patent number: 8493205Abstract: A method of using a non-GPS-derived technique to estimate the location of an Assisted-GPS-enabled wireless terminal for the purposes of generating location-specific assistance data for the wireless terminal is disclosed. The wireless terminal then uses the assistance data to acquire and process one or more GPS signals and to derive information that is probative of the wireless terminal's location. The GPS-derived location information is then combined with non-GPS-derived location to form an estimate of the location of the wireless terminal that is better than can be derived from either alone. This combination of GPS-derived and non-GPS techniques is particularly useful when the wireless terminal can only acquire one or two GPS signals because it is not possible to determine the location of the wireless terminal with only two GPS signals alone.Type: GrantFiled: January 29, 2010Date of Patent: July 23, 2013Assignees: NTT DoCoMo, Inc., Polaris Wireless, Inc.Inventors: Tarun Kumar Bhattacharya, Hassan M. El-Sallabi, Scot Douglas Gordon
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Patent number: 8433250Abstract: A method and apparatus for estimating whether or not a wireless terminal is indoors are disclosed. The illustrative embodiment employs a pattern classifier that is trained on a plurality of input/output mappings, where each mapping corresponds to a respective location, the output of the mapping is a Boolean value that indicates whether the location is indoors, and the input of the mapping is based on empirical and predicted signal data for the location. In accordance with the illustrative embodiment, a computer-executable program is generated based on the trained pattern classifier. The computer-executable program estimates whether or not a wireless terminal is indoors based on empirical data reported by the terminal, and on a location estimate for the terminal that might be crude or inaccurate (e.g., based on Cell Identifier [Cell-ID], GPS, etc.).Type: GrantFiled: January 29, 2010Date of Patent: April 30, 2013Assignee: NTT DoCoMo, Inc.Inventors: Tarun Kumar Bhattacharya, Hassan Mohamed El-Sallabi, Scot Douglas Gordon, Yasuhiro Oda, Jiyun Shen
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Publication number: 20130072230Abstract: An apparatus and method are disclosed for tracking a large number of wireless terminals and for estimating the location of the terminals at each instant. Some embodiments of the present invention use a wide variety of factors to determine the order and frequency with which each wireless terminal is located. These factors include, but are not limited to, the history of the location of the wireless terminal, the time of day, and the weather.Type: ApplicationFiled: September 19, 2011Publication date: March 21, 2013Applicant: POLARIS WIRELESS, INC.Inventors: Ankit Bansal, Tarun Kumar Bhattacharya, Martin Feuerstein, Scot Douglas Gordon, Robert Lewis Martin, David Stevenson Spain, JR.
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Patent number: 8320933Abstract: A method for estimating whether or not a wireless terminal is in a zone is described. The method is based on the following observation: when a wireless terminal is at a particular location, the values of the traits of the ambient electromagnetic signals that vary with location represent a “fingerprint” or “signature” for that location. This enables the location of a wireless terminal to be estimated by comparing the observed values of the traits of the ambient electromagnetic signals with the fingerprint for each potential location for the wireless terminal.Type: GrantFiled: February 28, 2007Date of Patent: November 27, 2012Assignee: Polaris Wireless, Inc.Inventors: Tarun Kumar Bhattacharya, Martin Feuerstein, Scot Douglas Gordon
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Publication number: 20120289249Abstract: A technique for estimating the location of a wireless terminal at an unknown location in a geographic region is disclosed. The technique is based on the recognition that there are traits of electromagnetic signals that are dependent on topography, the receiver, the location of the transmitter, and other factors. For example, if a particular radio station is known to be received strongly at a first location and weakly at a second location, and a given wireless terminal at an unknown location is receiving the radio station weakly, it is more likely that the wireless terminal is at the second location than at the first location.Type: ApplicationFiled: July 18, 2012Publication date: November 15, 2012Applicant: POLARIS WIRELESS, INC.Inventors: Tarun Kumar Bhattacharya, Martin Feuerstein, Scot Douglas Gordon, David Stevenson Spain, JR.
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Publication number: 20120282947Abstract: A technique for estimating the location of a wireless terminal at an unknown location in a geographic region is disclosed. The technique is based on the recognition that there are traits of electromagnetic signals that are dependent on topography, the receiver, the location of the transmitter, and other factors. For example, if a particular radio station is known to be received strongly at a first location and weakly at a second location, and a given wireless terminal at an unknown location is receiving the radio station weakly, it is more likely that the wireless terminal is at the second location than at the first location.Type: ApplicationFiled: July 18, 2012Publication date: November 8, 2012Applicant: Polaris Wireless, Inc.Inventors: Tarun Kumar Bhattacharya, Martin Feuerstein, Scot Douglas Gordon, David Stevenson Spain, JR.
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Patent number: 8106818Abstract: It is an object of the present invention to perform positioning at the proper positioning time and positioning precision in response to a requirement with respect to positioning.Type: GrantFiled: December 31, 2009Date of Patent: January 31, 2012Assignees: Polaris Wireless, Inc., NTT DoCoMo, Inc.Inventors: Tarun Kumar Bhattacharya, Hassan Mohamed El-Sallabi, Scot Douglas Gordon, Yasuhiro Oda, Jiyun Shen
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Patent number: 8106817Abstract: It is an object of the present invention to obtain a positioning result corresponding to the state of a receiver in less time.Type: GrantFiled: December 31, 2009Date of Patent: January 31, 2012Assignees: Polaris Wireless, Inc., NTT DoCoMo, Inc.Inventors: Tarun Kumar Bhattacharya, Hassan Mohamed El-Sallabi, Scot Douglas Gordon, Yasuhiro Oda, Jiyun Shen