Patents by Inventor O-Sok Song

O-Sok Song 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: 10091686
    Abstract: A method for transmitting packet data units Packet Data Units (PDUs) at a PDU transmitter in a communication system is provided. The method includes transmitting a first PDU comprising a PDU header and a data portion, receiving Negative Acknowledgement NACK information for the first PDU, segmenting the first PDU to form one or more PDU segments if a size of a second PDU for retransmission is smaller than a size of the first PDU, wherein each of the one or more PDU segment comprises a PDU segment header and a data portion, and transmitting the one or more PDU segment to a PDU receiver.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: October 2, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Soeng-Hun Kim, Sung-Ho Choi, O-Sok Song, Gert Jan Van Lieshout, Himke Van Der Velde
  • Patent number: 9955394
    Abstract: A method and apparatus for performing a L3 handover between CNs in a packet-switched network are provided. When a UE moves from an old RAN to a new RAN, the UE sends a measurement report message including cell information to the old RAN. The old or new RAN determines whether to perform a L3 handover. If the L3 handover is required, a tunnel is established between the new RAN and a new CN. The UE performs a handover from the old RAN to the new RAN, without establishing a tunnel between the new RAN and an old CN. Upon detection of the movement of the UE, the new RAN sends a L2 handover complete message to the old RAN. After moving to the new RAN, the UE acquires a new IP address, performs the L3 handover, and communicates with the new CN through the new RAN.
    Type: Grant
    Filed: January 4, 2016
    Date of Patent: April 24, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Eun-Hui Bae, Sung-Ho Choi, O-Sok Song, Han-Na Lim
  • Patent number: 9729223
    Abstract: A method and apparatus for transmitting and receiving CQI in a wireless communication system are provided.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: August 8, 2017
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Kyeong-In Jeong, Soeng-Hun Kim, Sung-Ho Choi, O-Sok Song, Gert-Jan Van Lieshout, Himke Van Der Velde
  • Publication number: 20160119841
    Abstract: A method and apparatus for performing a L3 handover between CNs in a packet-switched network are provided. When a UE moves from an old RAN to a new RAN, the UE sends a measurement report message including cell information to the old RAN. The old or new RAN determines whether to perform a L3 handover. If the L3 handover is required, a tunnel is established between the new RAN and a new CN. The UE performs a handover from the old RAN to the new RAN, without establishing a tunnel between the new RAN and an old CN. Upon detection of the movement of the UE, the new RAN sends a L2 handover complete message to the old RAN. After moving to the new RAN, the UE acquires a new IP address, performs the L3 handover, and communicates with the new CN through the new RAN.
    Type: Application
    Filed: January 4, 2016
    Publication date: April 28, 2016
    Inventors: Eun-Hui BAE, Sung-Ho CHOI, O-Sok SONG, Han-Na LIM
  • Patent number: 9232444
    Abstract: A method and apparatus for performing a L3 handover between CNs in a packet-switched network are provided. When a UE moves from an old RAN to a new RAN, the UE sends a measurement report message including cell information to the old RAN. The old or new RAN determines whether to perform a L3 handover. If the L3 handover is required, a tunnel is established between the new RAN and a new CN. The UE performs a handover from the old RAN to the new RAN, without establishing a tunnel between the new RAN and an old CN. Upon detection of the movement of the UE, the new RAN sends a L2 handover complete message to the old RAN. After moving to the new RAN, the UE acquires a new IP address, performs the L3 handover, and communicates with the new CN through the new RAN.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: January 5, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Eun-Hui Bae, Sung-Ho Choi, O-Sok Song, Han-Na Lim
  • Publication number: 20150162967
    Abstract: A method and apparatus for transmitting and receiving CQI in a wireless communication system are provided.
    Type: Application
    Filed: February 17, 2015
    Publication date: June 11, 2015
    Inventors: Kyeong-In JEONG, Soeng-Hun KIM, Sung-Ho CHOI, O-Sok SONG, Gert-Jan VAN LlESHOUT, Himke Van Der Velde
  • Patent number: 9002293
    Abstract: A method and apparatus for transmitting and receiving CQI in a wireless communication system are provided, in which when a UE transitions from a continuous reception state to a DRX state, CQI report resources are reallocated to the UE according to a CQI report resource reallocation rule agreed between the UE and an E-RAN, which obviates the need for signaling information about allocated new CQI report resources.
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: April 7, 2015
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Kyeong-In Jeong, Soeng-Hun Kim, Sung-Ho Choi, O-Sok Song, Gert-Jan Van Lieshout, Himke Van Der Velde
  • Patent number: 8910271
    Abstract: This invention relates to the area of Mobility and Handover between heterogeneous wireless networks. The scope of the invention also covers the case when the UE is capable of accessing both the WLAN and EUTRAN access systems simultaneously and also the case where the UE is not capable of accessing both the WLAN and EUTRAN access systems simultaneously. This invention provides a system and method to perform Mobility between the access systems with optimized authentication procedure using security context transfer between the access systems and also minimize the data loss by buffering the data during the handover. More specifically, this invention provides a system and method to support handover between the I-WLAN and the EUTRAN access systems.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: December 9, 2014
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Rajavelsamy Rajadurai, Venkateswar Jeedigunta, Rahul Suhas Vaidya, O-Sok Song, Sung-Ho Choi
  • Publication number: 20140204886
    Abstract: A method for controlling a rate of a voice service in a mobile communication system supporting the voice service via a packet network. The method includes the steps of receiving a control message at a terminal from a radio network controller (RNC); if the control message indicates control of a downlink rate, determining a downlink rate according to the control message; setting a Change Mode Request (CMR) field of an uplink Voice over Internet Protocol (VoIP) packet according to the downlink rate, and transmitting the uplink VoIP packet from the terminal to the RNC; if the received control message indicates control of an uplink rate, determining an uplink rate according to the control message; and generating an uplink VoIP packet including uplink voice data generated according to the determined uplink rate and frame type (FT) information indicating the determined uplink rate, and transmitting the uplink VoIP packet from the terminal to the RNC.
    Type: Application
    Filed: March 25, 2014
    Publication date: July 24, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Seong-Hun KIM, Sung-Ho CHOI, Gert-Jan VAN LIESHOUT, Himke VAN DER VELDE, O-Sok SONG
  • Publication number: 20140112255
    Abstract: A method for transmitting packet data units Packet Data Units (PDUs) at a PDU transmitter in a communication system is provided. The method includes transmitting a first PDU comprising a PDU header and a data portion, receiving Negative Acknowledgement NACK information for the first PDU, segmenting the first PDU to form one or more PDU segments if a size of a second PDU for retransmission is smaller than a size of the first PDU, wherein each of the one or more PDU segment comprises a PDU segment header and a data portion, and transmitting the one or more PDU segment to a PDU receiver.
    Type: Application
    Filed: December 23, 2013
    Publication date: April 24, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Soeng-Hun KIM, Sung-Ho CHOI, O-Sok SONG, Gert Jan VAN LIESHOUT, Himke VAN DER VELDE
  • Patent number: 8681625
    Abstract: A method for controlling a rate of a voice service in a mobile communication system supporting the voice service via a packet network. The method includes the steps of receiving a control message at a terminal from a radio network controller (RNC); if the control message indicates control of a downlink rate, determining a downlink rate according to the control message; setting a Change Mode Request (CMR) field of an uplink Voice over Internet Protocol (VoIP) packet according to the downlink rate, and transmitting the uplink VoIP packet from the terminal to the RNC; if the received control message indicates control of an uplink rate, determining an uplink rate according to the control message; and generating an uplink VoIP packet including uplink voice data generated according to the determined uplink rate and frame type (FT) information indicating the determined uplink rate, and transmitting the uplink VoIP packet from the terminal to the RNC.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: March 25, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Soeng-Hun Kim, Sung-Ho Choi, Gert-Jan Van Lieshout, Himke Van Der Velde, O-Sok Song, No-Jun Kwak, Kyeong-In Jeong
  • Patent number: 8634400
    Abstract: A method and terminal apparatus for transmitting a status report comprising a received status of packet data in a mobile communication system are provided, in which whether transmission of an implicit Negative Acknowledge (NACK) signal is required for requesting retransmission of at least one non-received data packet whose sequence number is unidentified is determined, if transmission of the implicit NACK signal is required, the implicit NACK signal including a sequence number of the last packet is generated among successfully received data packets, and a status report including the implicit NACK signal is transmitted to the transmitter, and if transmission of the implicit NACK signal is not required, a status report is transmitted to the transmitter including at least one of an ACK signal comprising a sequence number of a successfully received data packet and an explicit NACK signal comprising a sequence number of a non-received data packet whose sequence number is identified.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: January 21, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Soeng-Hun Kim, Sung-Ho Choi, O-Sok Song, Gert Jan Van Lieshout, Himke Van Der Velde
  • Patent number: 8582566
    Abstract: Disclosed is a method and system for mutually exchanging capability information of UEs for communication between a Circuit-Switched (CS) and IMS services (CSI) UE, which can use a CS call for voice communication while using an IMS session for PS service, and an IMS UE which uses an IMS session for both voice communication and PS service. A MGCF performs interworking of capability information between a CS message and an IMS message so that the IMS UE can process UE capability information through an IMS session request/response. When a call request message containing no capability information is created from a UE not supporting capability exchange, a CSI AS transfers the call request message to a peer UE after inserting estimable capability information of the UE into the call request message, and stores capability information of the counterpart UE for the UE.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: November 12, 2013
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Eun-Hui Bae, O-Sok Song, Sung-Ho Choi, Tae-Sun Yeoum, Han-Na Lim
  • Patent number: 8565772
    Abstract: Provided is a handover method, in which a call manager of a network having a Circuit Switching (CS) network, a Long Term Evolution (LTE) network, and an Internet Protocol Multimedia Subsystem (IMS) network, provides handover, from the LTE network to the CS network, to a terminal that uses one radio channel. The handover method includes upon receiving a request for handover from the terminal via a node of the LTE network, establishing a line to a Mobile Switching Center (MSC) of the CS network; sending, to the call manager, a request for a change in a session to another party's terminal in communication with the terminal, to establish an Internet Protocol (IP) bearer between the call manager and the other party's terminal; and sending a handover command to the terminal during the establishment of an IP bearer, to establish a radio channel to the base station of the CS network.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: October 22, 2013
    Assignees: Samsung Electronics Co., Ltd, Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Eun-Hui Bae, Sung-Ho Choi, O-Sok Song, Tae-Sun Yeoum, Han-Na Lim, Jai-Yong Lee, Hyun-Duk Jung, Kyung-Min Kim
  • Patent number: 8462742
    Abstract: Disclosed is a method and system of deriving new keys for accessing a new system. The method enables an optimized authentication procedure during handover form an existing system to a new system by using the existing system access keys. The user equipment that is accessing the new system receives a temporary ID during handover preparation which enables the user equipment to perform a fast re-authentication. The method uses existing system access keys to derive system access keys for the new network.
    Type: Grant
    Filed: April 2, 2007
    Date of Patent: June 11, 2013
    Assignee: Samsung Electronics Co., Ltd
    Inventors: O-Sok Song, Rajavelsamy Rajadurai, Jedigunta Venkateshwar
  • Publication number: 20130042304
    Abstract: This invention relates to the area of Mobility and Handover between heterogeneous wireless networks. The scope of the invention also covers the case when the UE is capable of accessing both the WLAN and EUTRAN access systems simultaneously and also the case where the UE is not capable of accessing both the WLAN and EUTRAN access systems simultaneously. This invention provides a system and method to perform Mobility between the access systems with optimized authentication procedure using security context transfer between the access systems and also minimize the data loss by buffering the data during the handover. More specifically, this invention provides a system and method to support handover between the I-WLAN and the EUTRAN access systems.
    Type: Application
    Filed: October 27, 2006
    Publication date: February 14, 2013
    Inventors: R. Rajavelsamy, Venkateswar Jeedigunta, Rahul Suhas Vaidya, O-Sok Song, Sung-Ho Choi
  • Patent number: 8335197
    Abstract: A method and apparatus are provided for transmitting a Session Initiation Protocol (SIP) message by a User Equipment (UE) in an idle mode in an Internet Protocol Multimedia Subsystem (IMS) system. The UE transmits one combined message of an AS control message and a NAS control message including information indicating transmission of an SIP message, thereby having an effect on an upper node to reduce a delay due to message processing.
    Type: Grant
    Filed: January 4, 2007
    Date of Patent: December 18, 2012
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Kyeong-In Jeong, Himke Van Der Velde, Sung-Ho Choi, Soeng-Hun Kim, O-Sok Song, No-Jun Kwak, Gert Jan Van Lieshout
  • Patent number: 8325708
    Abstract: A method and apparatus is provided for communication between a first terminal capable of using both a Circuit Switched (CS) call and an Internet Protocol Multimedia Subsystem (IMS) session, and a second terminal capable of using the IMS session, in a communication system supporting a Combined CS call and IMS session (CSI service). If the second terminal sends a Session Initiation Protocol (SIP) request (INVITE) message to originate a voice service or a multimedia service including the voice service with the first terminal, a CSI Application Server (AS) of an IMS domain managing the first terminal separates a voice service-related component included in the request message from a multimedia service-related component, and generates and sends first and second request messages to the first terminal.
    Type: Grant
    Filed: August 1, 2006
    Date of Patent: December 4, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Han-Na Lim, O-Sok Song, Sung-Ho Choi, Eun-Hui Bae, Tae-Sun Yeoum
  • Patent number: 8260297
    Abstract: An efficient uplink timing synchronization procedure performed with a target cell upon handover of a User Equipment (UE) in active mode in a mobile communication system is provided, in which a cell transmitter signals to the UE that the uplink timing synchronization procedure is not required in the target cell, and the UE carries out uplink transmission to the target cell at an uplink timing used in a source cell without the uplink timing synchronization procedure.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: September 4, 2012
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Kyeong-In Jeong, Sung-Ho Choi, Ju-Ho Lee, O-Sok Song, Gert-Jan Van Lieshout, Himke Van Dervelde
  • Patent number: 8244877
    Abstract: A method and system for processing a message in an Internet protocol-based mobile communication system supporting a multimedia service. In the system, application servers include a representative application server and multiple backend application servers. A method for defining a control message between application servers to set up a session using the standard Internet protocol is provided. When an application server performs a call processing operation, control message processing load and control message transmission delay is reduced.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: August 14, 2012
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Tae-Sun Yeoum, Han-Na Lim, O-Sok Song, Joon-Ho Jung