Patents by Inventor Ke-Chi Jang

Ke-Chi Jang 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: 11451952
    Abstract: A mobile station receives a control message containing an indicator of presence of a first access network that operates according to a first protocol that is capable of interworking with a second access network that operates according to a second, different protocol. In response to receiving the indicator, the mobile station performs a procedure to establish a personality for the mobile station that specifies the configuration to allow the mobile station to use features of the first access network that enable interworking with the second access network.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: September 20, 2022
    Assignee: Apple Inc.
    Inventors: Ke-Chi Jang, Eric Parsons
  • Patent number: 10863419
    Abstract: A method for controlling access to a wireless Access Network (AN) by a wireless communication device. The device stores a Device Access Priority (DAP) level based on characteristics of the device. When the device has data to send, the device receives an overhead message from the AN containing a Network Access Priority (NAP) parameter defining a minimum priority level for initiating network access. The device determines whether its DAP level is equal to or greater than the NAP parameter. If not, the device periodically repeats the receiving and determining steps until the stored DAP level is determined to be equal to or greater than the NAP parameter received from the AN. When the stored DAP level is equal to or greater than the NAP parameter, the device initiates network access. The device may perform and pass a Persistence Test before transmitting the data on an access channel (ACH).
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: December 8, 2020
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Ke-Chi Jang, Airin Cherian
  • Publication number: 20200084693
    Abstract: A method for controlling access to a wireless Access Network (AN) by a wireless communication device. The device stores a Device Access Priority (DAP) level based on characteristics of the device. When the device has data to send, the device receives an overhead message from the AN containing a Network Access Priority (NAP) parameter defining a minimum priority level for initiating network access. The device determines whether its DAP level is equal to or greater than the NAP parameter. If not, the device periodically repeats the receiving and determining steps until the stored DAP level is determined to be equal to or greater than the NAP parameter received from the AN. When the stored DAP level is equal to or greater than the NAP parameter, the device initiates network access. The device may perform and pass a Persistence Test before transmitting the data on an access channel (ACH).
    Type: Application
    Filed: November 11, 2019
    Publication date: March 12, 2020
    Inventors: Ke-Chi JANG, Airin CHERIAN
  • Patent number: 10499316
    Abstract: A method for controlling access to a wireless Access Network (AN) by a wireless communication device. The device stores a Device Access Priority (DAP) level based on characteristics of the device. When the device has data to send, the device receives an overhead message from the AN containing a Network Access Priority (NAP) parameter defining a minimum priority level for initiating network access. The device determines whether its DAP level is equal to or greater than the NAP parameter. If not, the device periodically repeats the receiving and determining steps until the stored DAP level is determined to be equal to or greater than the NAP parameter received from the AN. When the stored DAP level is equal to or greater than the NAP parameter, the device initiates network access. The device may perform and pass a Persistence Test before transmitting the data on an access channel (ACH).
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: December 3, 2019
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Ke-Chi Jang, Airin Cherian
  • Patent number: 9844001
    Abstract: A system and method is provided for coverage compensation in a communication system. In one embodiment, a method of operating a source access point in an energy saving mode for selecting a target access point to provide coverage compensation includes providing a notify message including a first set of coverage parameters to a target access point requesting coverage compensation. The method also includes receiving a first response message from the target access point including an indication that the target access point cannot support the coverage compensation and at least one reason therefor.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: December 12, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Ke-Chi Jang
  • Patent number: 9813942
    Abstract: A system and method to perform load-balancing and congestion control between a primary Radio Access Technology (RAT) and a secondary RAT. A broadcast message is sent to all User Equipments (UEs) operating under the secondary RAT. If the primary RAT is congested, a congestion indicator in the broadcast message prevents the UEs from idle re-selecting or switching to the primary RAT. Even if the primary RAT is not congested, the broadcast message may still include other parameters such as one or more probability values, a group identifier for the UE groups, and a retention timer. The idle UEs in the secondary RAT that generate device-specific random values that are equal to or greater than the applicable probability threshold value(s) are allowed to reselect the primary RAT. If an idle UE fails this probability test, it may not be allowed to reselect the primary RAT again until the retention timer expires.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: November 7, 2017
    Assignee: Telefonaktiebolaget LM Ericsson(publ)
    Inventor: Ke-Chi Jang
  • Patent number: 9775091
    Abstract: A handover control method and apparatus for limiting handover of a User Equipment (UE) from a macrocell to an underlying small cell when the UE is operating in a High Speed Mobility (HSM) mode in a radio access network. The UE receives an HSM pilot strength threshold offset parameter from the network and initiates handover from a macrocell to an underlying small cell using a first pilot strength threshold value when the UE is operating in a standard mode. The UE initiates the handover using a second pilot strength threshold value when the UE is operating in HSM mode. The second pilot strength threshold value is equal to the first pilot strength threshold value modified by the HSM pilot strength threshold offset parameter.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: September 26, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Ke-Chi Jang
  • Patent number: 9730261
    Abstract: A hierarchical protocol classification and signaling method specifies the interworking protocols used to send circuit-switched signaling messages to and from a mobile terminal in a packet-switched network. A set of possible interworking protocols are divided into two more classes that correspond to different types of interworking protocols. Within each class, different versions of the interworking protocol are specified by a revision value. The versions of the interworking protocols within a given class are may be denominated such that the versions with a higher revision value are backward compatible with versions having a lower value. When a circuit services domain message is sent from a sending device to a receiving device, an interworking option specifying the class/revision of the interworking protocol is transmitted along with circuit services domain messages. The interworking option may be inserted into the header of a tunneling packet containing the circuit services domain message.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: August 8, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Octavio Jose De Franca Lima, Ke-Chi Jang
  • Patent number: 9596616
    Abstract: A system and method in which a Radio Link Failure, RLF, report from a User Equipment, UE, provides system time-based timestamps to enable a source node to correctly analyze the real cause of an RLF associated with a handover. The timestamps are provided for the latest fulfillment of each event-specific entering condition associated with a handover-triggering event and for the occurrence of the RLF. The recorded timestamps are sent as part of RLF-reporting information to be forwarded to the source node to assist the source node in adjusting event-specific threshold(s) as well as other non-threshold related handover parameters such as the Time To Trigger, TTT, period, the time delay between a UE's transmission of its Measurement Report and the source node's transmission of the handover command, and the like, to reduce similar RLFs in the future. The generation of timestamps does not waste the UE's processing resources or battery power.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: March 14, 2017
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Ke-Chi Jang, Angelo Centonza
  • Publication number: 20170013541
    Abstract: A method for controlling access to a wireless Access Network (AN) by a wireless communication device. The device stores a Device Access Priority (DAP) level based on characteristics of the device. When the device has data to send, the device receives an overhead message from the AN containing a Network Access Priority (NAP) parameter defining a minimum priority level for initiating network access. The device determines whether its DAP level is equal to or greater than the NAP parameter. If not, the device periodically repeats the receiving and determining steps until the stored DAP level is determined to be equal to or greater than the NAP parameter received from the AN. When the stored DAP level is equal to or greater than the NAP parameter, the device initiates network access. The device may perform and pass a Persistence Test before transmitting the data on an access channel (ACH).
    Type: Application
    Filed: September 23, 2016
    Publication date: January 12, 2017
    Inventors: Ke-Chi JANG, Airin CHERIAN
  • Patent number: 9532303
    Abstract: A mobile station attached to an access network receives a control message identifying neighboring cells of a different wireless technology than the access network. The mobile station searches for signaling of the neighboring cells of the different wireless technology, and in response to not being able to detect the signaling of the neighboring cells, the mobile station increases a time interval between successive searches for the signaling.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: December 27, 2016
    Assignee: Apple Inc.
    Inventors: Ke-Chi Jang, Eric Parsons
  • Patent number: 9480000
    Abstract: A method for controlling access to a wireless Access Network (AN) by a wireless communication device. The device stores a Device Access Priority (DAP) level based on characteristics of the device. When the device has data to send, the device receives an overhead message from the AN containing a Network Access Priority (NAP) parameter defining a minimum priority level for initiating network access. The device determines whether its DAP level is equal to or greater than the NAP parameter. If not, the device periodically repeats the receiving and determining steps until the stored DAP level is determined to be equal to or greater than the NAP parameter received from the AN. When the stored DAP level is equal to or greater than the NAP parameter, the device initiates network access. The device may perform and pass a Persistence Test before transmitting the data on an access channel (ACH).
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: October 25, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ke-Chi Jang, Airin Cherian
  • Patent number: 9473998
    Abstract: A node of a secondary RAT that is in communication with a primary node of a primary RAT and UEs that are able to communicate by way of the primary and secondary RATs. The node includes a network interface unit of the node which receives a message from the primary node that indicates that the primary RAT is in an overload condition. The node includes a processing unit of the node which forms UE messages for the UEs not to try to communicate with the primary RAT, the network interface unit of the node sending the messages to the UEs. A method of a node of a secondary RAT that is in communication with a primary node of a primary RAT and UEs that are able to communicate by way of the primary and secondary RATs.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: October 18, 2016
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Ke-Chi Jang
  • Publication number: 20160249271
    Abstract: A handover control method and apparatus for limiting handover of a User Equipment (UE) from a macrocell to an underlying small cell when the UE is operating in a High Speed Mobility (HSM) mode in a radio access network. The UE receives an HSM pilot strength threshold offset parameter from the network and initiates handover from a macrocell to an underlying small cell using a first pilot strength threshold value when the UE is operating in a standard mode. The UE initiates the handover using a second pilot strength threshold value when the UE is operating in HSM mode. The second pilot strength threshold value is equal to the first pilot strength threshold value modified by the HSM pilot strength threshold offset parameter.
    Type: Application
    Filed: April 29, 2016
    Publication date: August 25, 2016
    Inventor: Ke-Chi Jang
  • Publication number: 20160234745
    Abstract: A node of a secondary RAT that is in communication with a primary node of a primary RAT and UEs that are able to communicate by way of the primary and secondary RATs. The node includes a network interface unit of the node which receives a message from the primary node that indicates that the primary RAT is in an overload condition. The node includes a processing unit of the node which forms UE messages for the UEs not to try to communicate with the primary RAT, the network interface unit of the node sending the messages to the UEs. A method of a node of a secondary RAT that is in communication with a primary node of a primary RAT and UEs that are able to communicate by way of the primary and secondary RATs.
    Type: Application
    Filed: April 14, 2016
    Publication date: August 11, 2016
    Inventor: Ke-Chi JANG
  • Publication number: 20160192148
    Abstract: In a wireless communications network, a method of performing a location service with respect to a mobile station includes communicating a paging message containing an indication of whether the paging message is related to at least one of an emergency-related location service and a law enforcement-related location service. In another aspect, a mobile station in a wireless communications network communicates messaging to move the mobile station to a traffic channel in response to a callback by at least one of an emergency services entity and a law enforcement entity. The mobile station also receives a location request on the traffic channel, the location request containing an indication of whether the location request is related to at least one of an emergency-related location service and a law enforcement-related location service.
    Type: Application
    Filed: March 9, 2016
    Publication date: June 30, 2016
    Inventors: Ke-Chi Jang, Robert E. Denman, Chung-Ching Wang
  • Publication number: 20160174104
    Abstract: A system and method to perform load-balancing and congestion control between a primary Radio Access Technology (RAT) and a secondary RAT. A broadcast message is sent to all User Equipments (UEs) operating under the secondary RAT. If the primary RAT is congested, a congestion indicator in the broadcast message prevents the UEs from idle re-selecting or switching to the primary RAT. Even if the primary RAT is not congested, the broadcast message may still include other parameters such as one or more probability values, a group identifier for the UE groups, and a retention timer. The idle UEs in the secondary RAT that generate device-specific random values that are equal to or greater than the applicable probability threshold value(s) are allowed to reselect the primary RAT. If an idle UE fails this probability test, it may not be allowed to reselect the primary RAT again until the retention timer expires.
    Type: Application
    Filed: February 8, 2016
    Publication date: June 16, 2016
    Inventor: Ke-Chi Jang
  • Patent number: 9357456
    Abstract: A handover control method and apparatus for limiting handover of a User Equipment (UE) from a macrocell to an underlying small cell when the UE is operating in a High Speed Mobility (HSM) mode in a radio access network. The UE receives an HSM pilot strength threshold offset parameter from the network and initiates handover from a macrocell to an underlying small cell using a first pilot strength threshold value when the UE is operating in a standard mode. The UE initiates the handover using a second pilot strength threshold value when the UE is operating in HSM mode. The second pilot strength threshold value is equal to the first pilot strength threshold value modified by the HSM pilot strength threshold offset parameter.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: May 31, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventor: Ke-Chi Jang
  • Patent number: 9351139
    Abstract: In a wireless communications network, a method of performing a location service with respect to a mobile station includes communicating a paging message containing an indication of whether the paging message is related to at least one of an emergency-related location service and a law enforcement-related location service. In another aspect, a mobile station in a wireless communications network communicates messaging to move the mobile station to a traffic channel in response to a callback by at least one of an emergency services entity and a law enforcement entity. The mobile station also receives a location request on the traffic channel, the location request containing an indication of whether the location request is related to at least one of an emergency-related location service and a law enforcement-related location service.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: May 24, 2016
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Ke-Chi Jang, Robert E. Denman, Chung-Ching Wang
  • Patent number: 9338682
    Abstract: A system, method, and device for minimizing uplink registration or location reports, such as route update messages, for fixed or low-mobility devices. An access terminal is configured to transmit route update messages to a radio access network at a first rate and also at a reduced rate that is lower than the first rate. The access terminal is configured to transmit to the radio access network a request to allow the access terminal to use a reduced reporting function that causes the access terminal to transmit route update messages at a reduced rate that is lower than the first rate, receive a response that grants permission to use the reduced reporting function, and transmit route update messages at the reduced rate in accordance with the reduced reporting function.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: May 10, 2016
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Airin Cherian, Ke-Chi Jang