Patents by Inventor Chen-Ho Chin

Chen-Ho Chin 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).

  • Publication number: 20130188604
    Abstract: Residential/Enterprise network connection management and handover scenarios. A method, system and device are provided for managing LIPA and/or SIPTO connection releases when UE moves out of residential/enterprise network coverage in case service continuity is not supported for the LIPA/SIPTO PDN connection(s). To address problems caused by not providing service continuity for LIPA/SIPTO PDN connections, the PDN connection/PDP context created in the HeNB/HNB by the MME/SGSN includes context information related to the UE indicating whether such connection is a LIPA PDN connection PDN connection or not. In particular, when the MME (1708) receives a handover request (17-1) from a source base station (1704), if it determines that the active PDN connections are LIPA PDN connections and that LIPA PDN continuity cannot be supported towards the target cell, the MME (1708) rejects the handover and sends (17-2) a Failure message to the source base station (1704).
    Type: Application
    Filed: September 27, 2011
    Publication date: July 25, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Chen Ho Chin, Noun Choi, Stefano Faccin
  • Patent number: 8467379
    Abstract: There is discussed a method of selecting an access domain for receiving a speech and/or video call at a mobile station of a mobile communications network in which calls are routed via a central service control common to a plurality of access domains. The method comprises the central service control transmitting an invite to establish a call to the terminating mobile station; the mobile station deciding on an access domain for receiving the call taking into account the capabilities of the local access network, and transmitting the selected access domain to the central service control; and establishing the call in accordance with the selected access domain.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: June 18, 2013
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Craig Bishop, Chen-Ho Chin
  • Publication number: 20130130688
    Abstract: A method is provided for managing a priority call in a serving cell. The method comprises, when a priority call is in progress in the serving cell, performing at least one of preventing at least one non-priority call from being handed over into the serving cell and preventing at least one non-priority call from being initiated in the serving cell.
    Type: Application
    Filed: November 5, 2010
    Publication date: May 23, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Chen-Ho Chin, Stefano M. Faccin, Muhammad Khaledul Islam, Mo-Han Fong
  • Patent number: 8422457
    Abstract: Methods and apparatus to manage voice service in evolved packet systems are disclosed. An example in a UE with a first indicator related to voice services in an Evolved Packet System (EPS) includes receiving a first Non Access Stratum (NAS) protocol response message with a second indicator and responsive to at least one of the first indicator or the second indicator, cause the UE to select to another radio access technology (RAT).
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: April 16, 2013
    Assignee: Research In Motion Limited
    Inventors: Johanna Lisa Dwyer, Richard Charles Burbidge, Stefano Faccin, Chen Ho Chin
  • Publication number: 20120329440
    Abstract: A UE including one or more processors configured to, responsive to determining that the UE has a voice service solution, set a “selective camping capability bit” and transmit the bit to a network.
    Type: Application
    Filed: February 8, 2011
    Publication date: December 27, 2012
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Chen Ho Chin, Stefano M. Faccin
  • Publication number: 20120322448
    Abstract: A user equipment (UE) is provided that includes one or more processors configured to perform one of an attach procedure, Routing Area Update (RAU), or Tracking Area Update (TAU), and then cause the UE to provide an indication to a network, wherein the indication indicates whether the UE has determined a voice solution in an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access Network (E-UTRAN).
    Type: Application
    Filed: February 8, 2011
    Publication date: December 20, 2012
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Chen Ho Chin, Stefano M. Faccin
  • Publication number: 20120315907
    Abstract: A method is provided for managing a priority call in a serving cell. The method comprises, when a priority call is in progress in the serving cell, an access device in the serving cell determining an amount of resources available in the serving cell. The method further comprises when the amount of resources available in the serving cell is below a threshold, the access device causing at least one non-priority call in the serving cell to be handed over to a target cell.
    Type: Application
    Filed: November 5, 2010
    Publication date: December 13, 2012
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Chen-Ho Chin, Stefano M. Faccin, Muhammad Khaledul Islam, Mo-Han Fong
  • Publication number: 20120300750
    Abstract: A method, system and device are provided for managing LIPA and/or SIPTO connection releases when UE moves out of residential/enterprise network coverage in case service continuity is not supported for the LIPA/SIPTO PDN connection(s). To address problems caused by not providing service continuity for LIPA/SIPTO PDN connections, the PDN connection/PDP context created in the HeNB/HNB by the MME/SGSN includes context information related to the UE indicating whether such connection is a LIPA PDN connection PDN connection or not. In addition, each UE may be configured to reconnect or not reconnect to the PDN corresponding to a certain APN or service, depending on how the PDN connection was disconnected by the network.
    Type: Application
    Filed: September 27, 2011
    Publication date: November 29, 2012
    Inventors: Chen Ho Chin, Noun Choi, Stefano Faccin
  • Publication number: 20120302196
    Abstract: A method implemented in a UE. NAS signaling is initiated or performed for an emergency call in order to establish a connection between the UE and one of a plurality of core networks (CNs). In a non-limiting example, the NAS signaling is initiated or performed after the ending of a prior established connection or emergency call. A determination is made whether the UE is already attached for emergency bearer services. Responsive to the UE being already attached for emergency bearer services, a NAS layer of a protocol stack of the UE causes transmission of a UE identification (ID) when requesting a radio resource control (RRC) connection for further NAS signaling. The UE ID includes data which can be used to determine to which CN of the plurality of CNs the connection should be directed.
    Type: Application
    Filed: January 7, 2011
    Publication date: November 29, 2012
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Chen Ho Chin, Richard Charles Burbidge
  • Patent number: 8306537
    Abstract: A method in user equipment (UE) associated with a first network cell in a wireless telecommunications system includes performing idle mode measurements of one or more network cells other than the first network cell when the UE is operating in an idle mode, receiving a request to access a first service unavailable through the first network cell, communicating with an access device associated with the first network cell based on results of the idle mode measurements, receiving from the access device an identification of a second network cell, and accessing the first service through the second network cell.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: November 6, 2012
    Assignee: Research In Motion Limited
    Inventors: Richard Charles Burbidge, Takashi Suzuki, David Philip Hole, Johanna Lisa Dwyer, Venkata Ratnakar Rao Rayavarapu, Maiyuran Wijayanathan, Stephen McCann, Mark Earnshaw, Chen Ho Chin
  • Publication number: 20120269099
    Abstract: A method for initiating a Packet Switched emergency call using a user equipment (UE) is presented. The UE includes a plurality of protocol layers. The plurality of protocol layers including an IMS sublayer, a non-access stratum (NAS) layer and an access stratum (AS) layer. The method includes generating an ATTACH REQUEST using the UE. The ATTACH REQUEST has an attach type. The method includes retrieving the attach type of the ATTACH REQUEST using the NAS layer of the UE, and generating an RRC CONNECTION REQUEST. The RRC CONNECTION REQUEST includes an RRC establishment cause based upon the attach type of the attach request.
    Type: Application
    Filed: October 1, 2010
    Publication date: October 25, 2012
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: Chen Ho Chin, Richard Charles Burbidge
  • Patent number: 8238267
    Abstract: Methods and apparatus to manage voice service in evolved packet systems are disclosed. An example method in a UE in an Evolved Packet System (EPS) includes receiving a first Non Access Stratum (NAS) protocol response message with network provided Voice over IP Multimedia (IM) Core Network (CN) Subsystem (VoIMS) indicators, wherein the UE has a voice services indicator related to a UE usage setting and responsive to at least one of the voice services indicator related to a UE usage setting or the network provided VoIMS indicators, causing the UE to disable evolved universal mobile telecommunications system terrestrial radio access (E-UTRAN) cell reselection.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: August 7, 2012
    Assignee: Research In Motion Limited
    Inventors: Johanna Lisa Dwyer, Richard Charles Burbidge, Stefano Faccin, Chen Ho Chin
  • Publication number: 20120076121
    Abstract: A method, system and device are provided for managing LIPA and/or SIPTO connection releases when UE moves out of residential/enterprise network coverage in case service continuity is not supported for the LIPA/SIPTO PDN connection(s). To address problems caused by not providing service continuity for LIPA/SIPTO PDN connections, the PDN connection/PDP context created in the HeNB/HNB by the MME/SGSN includes context information related to the UE indicating whether such connection is a LIPA PDN connection PDN connection or not. In addition, each UE may be configured to reconnect or not reconnect to the PDN corresponding to a certain APN or service, depending on how the PDN connection was disconnected by the network.
    Type: Application
    Filed: September 27, 2011
    Publication date: March 29, 2012
    Inventors: Noun Choi, Stefano Faccin, Chen Ho Chin
  • Publication number: 20120044867
    Abstract: Example methods and apparatus to maintain call continuity are disclosed. A disclosed example method to control a user equipment (UE) includes the UE initiating a tracking area updating (TAU) procedure in an EMM_CONNECTED mode, identifying a lack of a voice service in response to the TAU procedure being successful, identifying a remaining bearer comprising a bearer context, and the UE staying in the EMM_CONNECTED mode until radio bearers associated with the bearer context are released.
    Type: Application
    Filed: August 18, 2011
    Publication date: February 23, 2012
    Inventors: Stefano Faccin, Jan Hendrik Lucas Bakker, Chen Ho Chin, Richard Charles Burbidge
  • Publication number: 20120044868
    Abstract: Example methods and apparatus to maintain call continuity are disclosed. A disclosed example method to authorize a request with service information (SI), including detecting whether the SI pertains to an existing Internet Packet (IP) flow, when the SI pertains to an existing IP flow, detecting whether the existing IP flow includes CS media, and when the existing IP flow includes CS media, determining a response to the request independent of a CS media indicator.
    Type: Application
    Filed: August 18, 2011
    Publication date: February 23, 2012
    Inventors: Stefano Faccin, Jan Hendrik Lucas Bakker, Chen Ho Chin, Richard Charles Burbidge
  • Publication number: 20120014324
    Abstract: Methods and apparatus to manage voice service in evolved packet systems are disclosed. An example method in a User Equipment (UE) includes receiving a Non Access Stratum (NAS) protocol response message with a first indicator, the first indicator provided by lower layers of the UE to upper layers of the UE, responsive to the first indicator, initiating an IMS registration if the UE is not already registered with the IMS, and responsive to the UE having registered with the IP Multimedia (IM) Core Network (CN) Subsystem (IMS), determining availability of voice services over the IP Multimedia (IM) Core Network (CN) Subsystem (IMS).
    Type: Application
    Filed: September 26, 2011
    Publication date: January 19, 2012
    Inventors: Johanna Lisa Dwyer, Richard Charles Burbidge, Stefano Faccin, Chen Ho Chin
  • Publication number: 20120014354
    Abstract: Methods and apparatus to manage voice service in evolved packet systems are disclosed. An example method in a UE in an Evolved Packet System (EPS) includes receiving a first Non Access Stratum (NAS) protocol response message with network provided Voice over IP Multimedia (IM) Core Network (CN) Subsystem (VoIMS) indicators, wherein the UE has a voice services indicator related to a UE usage setting and responsive to at least one of the voice services indicator related to a UE usage setting or the network provided VoIMS indicators, causing the UE to disable evolved universal mobile telecommunications system terrestrial radio access (E-UTRAN) cell reselection.
    Type: Application
    Filed: September 26, 2011
    Publication date: January 19, 2012
    Inventors: Johanna Lisa Dwyer, Richard Charles Burbidge, Stefano Faccin, Chen Ho Chin
  • Publication number: 20120015646
    Abstract: A method performed by user equipment (UE) includes receiving a request to access a service unavailable through a first network cell associated with the UE, and receiving a message from an access device associated with the first network cell, wherein the message identifies a plurality of second network cells providing the service.
    Type: Application
    Filed: September 26, 2011
    Publication date: January 19, 2012
    Inventors: Richard Charles Burbidge, Takashi Suzuki, David Philip Hole, Johanna Lisa Dwyer, Venkata Ratnakar Rao Rayavarapu, Maiyuran Wijayanathan, Stephen McCann, Mark Earnshaw, Chen-Ho Chin
  • Publication number: 20120014381
    Abstract: Methods and apparatus to manage voice service in evolved packet systems are disclosed. An example method in a user equipment (UE) with a first indicator related to voice services in an Evolved Packet System (EPS), the method includes receiving a Non Access Stratum (NAS) protocol response message with a second indicator and responsive to the first indicator and the second indicator, sending a notification to at least one of a user or an upper layer that a CS domain is not available.
    Type: Application
    Filed: September 26, 2011
    Publication date: January 19, 2012
    Inventors: Johanna Lisa Dwyer, Richard Charles Burbidge, Stefano Faccin, Chen Ho Chin
  • Publication number: 20110305192
    Abstract: Methods and apparatus for voice domain operation are described herein. One example method includes determining that an LTE network is not preferred for voice service provision; storing an identification of the LTE network that is not preferred for voice service provision; and accessing the stored identification of the LTE network that is not preferred for voice service provision.
    Type: Application
    Filed: June 11, 2010
    Publication date: December 15, 2011
    Inventors: Stefano Faccin, Chen Ho Chin, Richard Charles Burbidge