Patents by Inventor I-MING TSAI

I-MING TSAI 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).

  • Patent number: 10419874
    Abstract: An indoor positioning system and method that correlates map locations to respective wireless access point (AP) fingerprints, and wherein each wireless AP fingerprint is a plurality of wireless AP signal measurements associated with the correlated map location. The method includes receiving position-inference data associated with a user; determining a probable location inside the building based on the position-inference data; receiving wireless AP signal measurements detected by a wireless device associated with the user; associating the probable location with the wireless device based on the association between the position-inference data and the user of the wireless device; and updating the wireless AP fingerprint correlated to the probable location using the received wireless AP signal measurements. The method and system use crowd-sourcing to build and refine the wireless AP fingerprints.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: September 17, 2019
    Assignee: BlackBerry Limited
    Inventors: I-Ming Tsai, Krishnam Raju Jampani, Jason Christopher Beckett, Daryl Joseph Martin, Jerry Mailloux
  • Patent number: 9955316
    Abstract: A method of determining room occupancy of a room in a facility having an indoor positioning system with wireless access point fingerprints each correlated to a location in the facility. The method may include receiving a request from a computing device for a room occupancy assessment associated with the room. It may further include obtaining location data that correlates to the location of one or more people from the indoor positioning system and determining from the location data associated with the room whether the room is occupied. The determination of whether the room is occupied is then sent to the computing device.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: April 24, 2018
    Assignee: BlackBerry Limited
    Inventors: Krishnam Raju Jampani, Daryl Joseph Martin, I-Ming Tsai, Jason Christopher Beckett
  • Patent number: 9860707
    Abstract: A method of determining room occupancy of a room in a facility having an indoor positioning system with wireless access point fingerprints each correlated to a location in the facility. The method may include receiving a request from a computing device for a room occupancy assessment associated with the room. It may further include obtaining location data that correlates to the locations of wireless devices associated with one or more people from the indoor positioning system and determining based on the location data whether the room is occupied. The determination of whether the room is occupied is then sent to the computing device.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: January 2, 2018
    Assignee: BlackBerry Limited
    Inventors: Krishnam Raju Jampani, Daryl Joseph Martin, I-Ming Tsai, Jason Christopher Beckett
  • Publication number: 20170223511
    Abstract: A method of determining room occupancy of a room in a facility having an indoor positioning system with wireless access point fingerprints each correlated to a location in the facility. The method may include receiving a request from a computing device for a room occupancy assessment associated with the room. It may further include obtaining location data that correlates to the locations of wireless devices associated with one or more people from the indoor positioning system and determining based on the location data whether the room is occupied. The determination of whether the room is occupied is then sent to the computing device.
    Type: Application
    Filed: April 20, 2017
    Publication date: August 3, 2017
    Applicant: BlackBerry Limited
    Inventors: Krishnam Raju JAMPANI, Daryl Joseph MARTIN, I-Ming TSAI, Jason Christopher BECKETT
  • Patent number: 9680642
    Abstract: In order to overcome the limitation of the prior art quantum key terminal equipment not being able to operate across different segments, the present invention discloses a quantum cryptography service network implementation technique to let a point-to-point quantum key equipment in one segment be redesigned to cooperate with other quantum key equipment in other segments to form a quantum key service network. As opposed to the prior art technique of having each segment generates its own quantum key, the present invention can map one pair of quantum key equipment with another pair of quantum key equipment, or map multiple pairs of quantum key equipment connected in series to have quantum keys entirely or partly shared by the quantum key equipment. Therefore, the generated quantum keys can be used across different segments. Each node in the quantum key service network can provide the quantum key to nearby telecommunication equipment in the telecommunication network of the same premises.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: June 13, 2017
    Assignee: CHUNGHWA TELECOM CO., LTD.
    Inventors: Tzuoh-Chyau Yeh, I-Ming Tsai
  • Publication number: 20170026804
    Abstract: An indoor positioning system and method that correlates map locations to respective wireless access point (AP) fingerprints, and wherein each wireless AP fingerprint is a plurality of wireless AP signal measurements associated with the correlated map location. The method includes receiving position-inference data associated with a user; determining a probable location inside the building based on the position-inference data; receiving wireless AP signal measurements detected by a wireless device associated with the user; associating the probable location with the wireless device based on the association between the position-inference data and the user of the wireless device; and updating the wireless AP fingerprint correlated to the probable location using the received wireless AP signal measurements. The method and system use crowd-sourcing to build and refine the wireless AP fingerprints.
    Type: Application
    Filed: March 4, 2016
    Publication date: January 26, 2017
    Applicant: BlackBerry Limited
    Inventors: I-Ming TSAI, Krishnam Raju JAMPANI, Jason Christopher BECKETT, Daryl Joseph MARTIN, Jerry MAILLOUX
  • Publication number: 20170026806
    Abstract: A method of determining room occupancy of a room in a facility having an indoor positioning system with wireless access point fingerprints each correlated to a location in the facility. The method may include receiving a request from a computing device for a room occupancy assessment associated with the room. It may further include obtaining location data that correlates to the location of one or more people from the indoor positioning system and determining from the location data associated with the room whether the room is occupied. The determination of whether the room is occupied is then sent to the computing device.
    Type: Application
    Filed: July 20, 2015
    Publication date: January 26, 2017
    Applicant: BLACKBERRY LIMITED
    Inventors: Krishnam Raju JAMPANI, Daryl Joseph MARTIN, I-Ming TSAI, Jason Christopher BECKETT
  • Patent number: 9301100
    Abstract: An indoor positioning system and method that correlates map locations to respective wireless access point (AP) fingerprints, and wherein each wireless AP fingerprint is a plurality of wireless AP signal measurements associated with the correlated map location. The method includes receiving position-inference data associated with a user; determining a probable location inside the building based on the position-inference data; receiving wireless AP signal measurements detected by a wireless device associated with the user; associating the probable location with the wireless device based on the association between the position-inference data and the user of the wireless device; and updating the wireless AP fingerprint correlated to the probable location using the received wireless AP signal measurements. The method and system use crowd-sourcing to build and refine the wireless AP fingerprints.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: March 29, 2016
    Assignee: BlackBerry Limited
    Inventors: Krishnam Raju Jampani, Daryl Joseph Martin, I-Ming Tsai, Jason Christopher Beckett, Jerry Mailloux
  • Patent number: 9164161
    Abstract: Mobile devices are able to determine their location based radio transmitters that are visible at the device to provide geographic location services. A knowledge of the location of the transmitters is required for the mobile device to determine a location estimate, however this can be difficult in network environments where the transmitters are temporary and their locations are not identified in location databases. Locations of temporary transmitters can be provided to mobile devices in order to augment the available location data used in determining the mobile device location. 3rd parties can provide temporal location data on transmitters that are set up for short period of time, as well as better control the distribution of the location data.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: October 20, 2015
    Assignee: BlackBerry Limited
    Inventors: Bruce Allen Bernhardt, Jingwei Xu, I-Ming Tsai
  • Publication number: 20140218241
    Abstract: Mobile devices are able to determine their location based radio transmitters that are visible at the device to provide geographic location services. A knowledge of the location of the transmitters is required for the mobile device to determine a location estimate, however this can be difficult in network environments where the transmitters are temporary and their locations are not identified in location databases. Locations of temporary transmitters can be provided to mobile devices in order to augment the available location data used in determining the mobile device location. 3rd parties can provide temporal location data on transmitters that are set up for short period of time, as well as better control the distribution of the location data.
    Type: Application
    Filed: February 4, 2013
    Publication date: August 7, 2014
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Bruce Allen BERNHARDT, Jingwei XU, I-Ming TSAI
  • Publication number: 20110317836
    Abstract: In order to overcome the limitation of the prior art quantum key terminal equipment not being able to operate across different segments, the present invention discloses a quantum cryptography service network implementation technique to let a point-to-point quantum key equipment in one segment be redesigned to cooperate with other quantum key equipment in other segments to form a quantum key service network. As opposed to the prior art technique of having each segment generates its own quantum key, the present invention can map one pair of quantum key equipment with another pair of quantum key equipment, or map multiple pairs of quantum key equipment connected in series to have quantum keys entirely or partly shared by the quantum key equipment. Therefore, the generated quantum keys can be used across different segments. Each node in the quantum key service network can provide the quantum key to nearby telecommunication equipment in the telecommunication network of the same premises.
    Type: Application
    Filed: February 17, 2011
    Publication date: December 29, 2011
    Applicant: CHUNGHWA TELECOM CO., LTD.
    Inventors: TZUOH-CHYAU YEH, I-MING TSAI