Patents by Inventor Ki-Back Kim

Ki-Back Kim 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: 8270353
    Abstract: An apparatus and method are provided for load balancing in a broadband communication system. In an initial network entry/network reentry/handover, whether to allow a user terminal and whether to allow each service flow are checked. The channel state and load state of candidate frequency assignments and subcells are detected. The ranging status of a corresponding frequency assignment or a corresponding subcell is set according to whether to allow the user terminal. The allowable candidate frequency assignment and subcells are selected and transmitted.
    Type: Grant
    Filed: August 28, 2008
    Date of Patent: September 18, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ki-Back Kim, Jae-Jeong Shim, Geun-Hwi Lim, Chang-Yeon Kim, Yoon-Jeong Ha
  • Patent number: 8249036
    Abstract: An apparatus and method for a Multicast and Broadcast Service (MBS) in a Broadband Wireless Access (BWA) system. In a method for operating a user terminal in a BWA system, an idle timer is driven when a flow for unicast connection has no traffic in an awake mode. Whether a broadcast service is being received is checked when the idle timer expires. The user terminal transitions from the awake mode to a fake idle mode when the broadcast service is being received.
    Type: Grant
    Filed: January 4, 2008
    Date of Patent: August 21, 2012
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Ki-Back Kim
  • Patent number: 8194540
    Abstract: An apparatus and method for managing quality of service (QoS) of a service flow in a wireless communication system are provided. A method of operating a base station (BS) in a wireless communication system includes receiving QoS policy information of mobile stations (MSs) from a network entity including a policy decision function (PDF) or from neighbor BSs, and storing the QoS policy information; detecting a mobile station attempting connection re-establishment; upon detecting the mobile station attempting connection re-establishment, evaluating a QoS policy of the mobile station; and controlling a state of a service flow generated for the mobile station according to the QoS policy.
    Type: Grant
    Filed: August 5, 2008
    Date of Patent: June 5, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ki-Back Kim, Sang-Ku Kim, Jae-Jeong Shim
  • Patent number: 8194578
    Abstract: A system and method for transmitting/receiving a multicast/broadcast signal in a communication system are provided, in which if the communication system includes at least one zone to which the same service is provided and the zone includes at least one ASN_GW and at least one BS connected to the ASN_GW, the ASN_GW generates a second multicast/broadcast signal using a received first multicast/broadcast signal according to information about the zone, generates time information indicating a time when the BS is to transmit the second multicast/broadcast signal, and transmits the second multicast/broadcast signal and the time information to the BS.
    Type: Grant
    Filed: October 15, 2007
    Date of Patent: June 5, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong-Soo Park, Ki-Back Kim, Hae-Jung Lim, Jin-Han Song, Jae-Woo Kwon, Eun-Chan Park
  • Publication number: 20120094662
    Abstract: A Base Station (BS) and method of the BS for controlling a scanning process of a mobile station are provided The method of the base station for controlling a scanning process of a mobile station includes receiving, at the base station, a scan request issued in association with the mobile station, determining whether the mobile station has a scan in progress by referencing a scan record table, transmitting a scan response to the mobile station, and recording a scanning status of the mobile station in the scan record table. The method and base station for controlling the scanning process of a mobile station is advantageous to avoid the collision of scanning processes.
    Type: Application
    Filed: August 5, 2011
    Publication date: April 19, 2012
    Applicant: SAMSUNG ELECTRONICS CO. LTD.
    Inventors: Young Kyu CHOI, Ki Back KIM, Han Seok KIM
  • Patent number: 8155066
    Abstract: A scheduling apparatus and method for proportional resource allocation among Mobile Virtual Network Operators (MVNOs) are provided. The method includes, for each MVNO, allocating a dedicated resource of each MVNO to Quality of Service (QoS) traffic in consideration of priorities, for each MVNO, determining a presence or absence of unscheduled QoS traffic, and for MVNOs each of which has the unscheduled QoS traffic, allocating a common resource shared by all MVNOs to the unscheduled QoS traffic in consideration of priorities without distinguishing each MVNO. Accordingly, proportional resource allocation depending on a pre-set ratio can be guaranteed, efficiency of resource use can be improved, and QoS can be guaranteed.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: April 10, 2012
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Eun-Chan Park, Ki-Back Kim
  • Publication number: 20120044845
    Abstract: A power control method of a base station in a wireless communication system based on Orthogonal Frequency Division Multiple Access (OFDMA) is provided for reducing power consumption by turning off the bias of the power amplifier for the duration of a symbol carrying no user data. The method includes checking scheduling information of radio resources, detecting a symbol carrying no user data, based on the scheduling information, and turning off a bias of the power amplifier for a symbol duration of the symbol carrying no user data. The transmission power control method is capable of reducing power consumption of the base station by turning off the bias of the power amplifier of the base station for the symbol duration in which no user data is transmitted.
    Type: Application
    Filed: June 13, 2011
    Publication date: February 23, 2012
    Applicant: SAMSUNG ELECTRONICS CO. LTD.
    Inventors: Dong Geun LEE, Young Bae PARK, Young Kyu CHOI, Ki Back KIM
  • Patent number: 8014330
    Abstract: An apparatus and method for selecting, releasing, and changing a MultiCast and BroadCast Service (MCBCS) of a Mobile Station (MS) in a Broadband Wireless Access (BWA) system are provided. The method includes, upon receiving a request to select a specific channel, transmitting a channel selection request message for selecting the channel; determining whether a DSA request message including a Media Access Control (MAC) layer name tag for the channel is received from an Access Service Network-Gateway (ASN-GW), and, upon receiving the DSA request message, transmitting a DSA response message to the ASN-GW; and receiving a channel selection response message including information indicating a success or failure of the channel selection from an MCBCS server. Accordingly, there is an advantage in that an overall transmission delay is reduced for an MCBCS call process, and a processing capacity can be effectively utilized.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: September 6, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Ki-Back Kim, Jun-Hwan Oh, Sung-Bum Park, Seong-Min Kim, Min-Young Park, Kyung-Jin Kim
  • Patent number: 8005044
    Abstract: A method and apparatus for receiving a service guide for a user terminal in a broadband wireless access system. The method includes transmitting, by the user terminal, a service guide request message to a MultiCast and BroadCast Service (MCBCS) server, and receiving, from the MCBCS server, a service guide response message including a mapping table. The mapping table identifies application layer name tags versus Medium Access Control (MAC) layer name tags with respect to broadcast channels, each of the MAC layer name tags being a Multicast Connection IDentifier (MCID) and each of the application layer name tags being a broadcast channel Internet Protocol (IP).
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: August 23, 2011
    Assignee: Samsung Electronics Co., Ltd
    Inventor: Ki-Back Kim
  • Patent number: 7864804
    Abstract: An apparatus and method for Connection Admission Control (CAC) in a Broadband Wireless Access (BWA) system are provided. In the method, a QoS class of a call requesting connection admission is detected and an application layer required bandwidth is determined using the QoS parameters of a service flow of the detected QoS class. A required bandwidth weight of the QoS class is determined in consideration of a packet header overhead. Per-slot available bandwidths of a reference QoS class and the QoS class are determined using the determined application layer required bandwidth, and a required bandwidth conversion ratio of a corresponding QoS class is determined using the determined per-slot available bandwidths. An equivalent MAC layer required bandwidth is determined using the determined application layer required bandwidth, the required bandwidth weight, and the required bandwidth conversion ratio.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: January 4, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ki-Back Kim, Eun-Chan Park
  • Patent number: 7835277
    Abstract: A method and apparatus for managing a buffer of a Radio Access Station (RAS) in a communication system are provided. An available buffer space determiner sets a threshold for each service class for scheduling packet input/output of the buffer according to priority of a service class, estimates and stores, upon receipt of a packet at the buffer, an available space size of the buffer after the packet reception, compares the estimated available space size of the buffer with a first threshold corresponding to a first service class indicative of a service class of the packet, and schedules packet input/output of the buffer according to the comparison result. A processor module schedules packet input/output of the buffer according to an output of the available buffer space determiner. The present invention can improve quality of services through service differentiation based on priorities of service classes and buffer management based on characteristics of the corresponding service traffics.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: November 16, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ki-Back Kim, Eun-Chan Park, Han-Seok Kim
  • Publication number: 20100157814
    Abstract: A network includes a Mobile Station (MS) for sending a Service Flow (SF) modification request message to a Base Station (BS) to modify an SF. The BS sends a path modification request message to a serving SF Authorization (SFA) when there is the information on the SF. The BS also sends an SF modification response message comprising a Confirmation Code ‘Reject SF not found’ to the MS when there is no information on the SF. The serving SFA sends a resource reservation request message to an anchor SFA when there is the information on the SF, and sends a path modification response message comprising a Failure Indication (FI) ‘Requested Context Unavailable’ to the BS when there is no information on the SF. The anchor SFA sends a resource reservation response message comprising the FI ‘Requested Context Unavailable’ to the serving SFA when there is no information on the SF.
    Type: Application
    Filed: December 15, 2009
    Publication date: June 24, 2010
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Yoon-Jeong Ha, Ki-Back Kim, Kwon-Young Kim, Hyung-Seok Ha, Jae-Jeong Shim, Jung-Shin Park, Han-Kyung Lee, Chang-Yeon Kim
  • Publication number: 20090268700
    Abstract: Apparatuses and methods for providing an emergency service in a wireless communication system are provided. The method includes allocating a Connection IDentifier (CID) used to transmit the emergency service message, determining a Convergence Sublayer (CS) type for processing the emergency service message, generating a Downlink Channel Descriptor (DCD) message which comprises at least one of the allocated CID and information relating to the determined CS type, and transmitting the generated DCD message to a Mobile Station (MS).
    Type: Application
    Filed: April 24, 2009
    Publication date: October 29, 2009
    Applicant: SAMSUNG ELECTRONICS CO. LTD.
    Inventors: Yeong-Moon SON, Hyun-Jeong KANG, Ki-Back KIM, Young-Bae PARK, Sunny CHANG, Sang-Kyou RYOU
  • Publication number: 20090190518
    Abstract: An apparatus and method for creating a data path for a broadcasting service in a cellular network is provided. In a method for creating a data path to provide a broadcasting service in a cellular network, a broadcast server transmits a session start request message to an Access Service Network-GateWay (ASN_GW) before transmission of Multicast and Broadcast Service (MBS) data, to request a multicast connection setup. The ASN_GW establishes a multicast connection between the broadcast server and the ASN_GW on the basis of information of the session start request message. The ASN_GW transmits a session start response message to the broadcast server in response to the session start request message, after establishment of the multicast connection between the broadcast server and the ASN_GW. The ASN_GW transmits a path registration request message to at least one base station associated with a broadcast zone, to request MBS data path establishment and air resource reservation.
    Type: Application
    Filed: January 21, 2009
    Publication date: July 30, 2009
    Applicant: SAMSUNG ELECTRONICS CO. LTD.
    Inventors: Ki-Back KIM, Han-Kyung LEE, Sung-Man KIM, Nae-Hyun LIM
  • Publication number: 20090187498
    Abstract: An apparatus and method for processing accounting in a wireless communication system are provided. The method includes creating an accounting data base (DB) for a mobile station (MS), determining whether a state transition of the MS occurs, if the state transition of the MS occurs, updating state information in the accounting DB, and transmitting the accounting information including the state information to an accounting server.
    Type: Application
    Filed: January 22, 2009
    Publication date: July 23, 2009
    Applicant: SAMSUNG ELECTRONICS Co., LTD
    Inventors: Han-Seok Kim, Ki-Back Kim
  • Publication number: 20090154413
    Abstract: An apparatus and method for Admission Control (AC) in a broadband wireless communication system are provided. The apparatus includes a classification unit for determining a Mobile Virtual Network Operator (MVNO), from a plurality of MVNOs, that provides services for a generated resource request, a manager for evaluating a resource occupation status of the MVNO and a resource amount permitted to the MVNO, and a determination unit for determining whether to admit the resource request according to at least one of the resource occupation status of the determined MVNO, the resource amount permitted to the determined MVNO and an available total resource amount.
    Type: Application
    Filed: December 2, 2008
    Publication date: June 18, 2009
    Applicant: SAMSUNG ELECTRONICS CO. LTD.
    Inventors: Ki-Back Kim, Eun-Chan Park, Chang-Yeon Kim
  • Publication number: 20090154415
    Abstract: A scheduling apparatus and method for proportional resource allocation among Mobile Virtual Network Operators (MVNOs) are provided. The method includes, for each MVNO, allocating a dedicated resource of each MVNO to Quality of Service (QoS) traffic in consideration of priorities, for each MVNO, determining a presence or absence of unscheduled QoS traffic, and for MVNOs each of which has the unscheduled QoS traffic, allocating a common resource shared by all MVNOs to the unscheduled QoS traffic in consideration of priorities without distinguishing each MVNO. Accordingly, proportional resource allocation depending on a pre-set ratio can be guaranteed, efficiency of resource use can be improved, and QoS can be guaranteed.
    Type: Application
    Filed: December 4, 2008
    Publication date: June 18, 2009
    Applicant: SAMSUNG ELECTRONICS CO. LTD.
    Inventors: Eun-Chan PARK, Ki-Back KIM
  • Publication number: 20090122734
    Abstract: An apparatus and method for providing a Multicast and Broadcast Service (MBS) in a Broadband Wireless Access (BWA) system are provided. The apparatus includes a fragmentation unit, a Generic Routing Encapsulation (GRE) packet generator, and a communication unit. The fragmentation unit fragmentizes MBS traffic received from a network for synchronization. The GRE packet generator generates a GRE packet with each of segments from the fragmentation unit. The communication unit transmits the GRE packet from the GRE packet generator to a Base Station (BS) in consideration of a packet period.
    Type: Application
    Filed: November 10, 2008
    Publication date: May 14, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Ki-Back KIM, Nae-Hyun LIM, Sang-Young LEE
  • Publication number: 20090116384
    Abstract: An apparatus and method for Connection Admission Control (CAC) in a Broadband Wireless Access (BWA) system are provided. In the method, a QoS class of a call requesting connection admission is detected and an application layer required bandwidth is determined using the QoS parameters of a service flow of the detected QoS class. A required bandwidth weight of the QoS class is determined in consideration of a packet header overhead. Per-slot available bandwidths of a reference QoS class and the QoS class are determined using the determined application layer required bandwidth, and a required bandwidth conversion ratio of a corresponding QoS class is determined using the determined per-slot available bandwidths. An equivalent MAC layer required bandwidth is determined using the determined application layer required bandwidth, the required bandwidth weight, and the required bandwidth conversion ratio.
    Type: Application
    Filed: November 6, 2008
    Publication date: May 7, 2009
    Applicant: SAMSUNG ELECTRONICS CO. LTD.
    Inventors: Ki-Back KIM, Eun-Chan PARK
  • Publication number: 20090059857
    Abstract: An apparatus and method are provided for load balancing in a broadband communication system. In an initial network entry/network reentry/handover, whether to allow a user terminal and whether to allow each service flow are checked. The channel state and load state of candidate frequency assignments and subcells are detected. The ranging status of a corresponding frequency assignment or a corresponding subcell is set according to whether to allow the user terminal. The allowable candidate frequency assignment and subcells are selected and transmitted.
    Type: Application
    Filed: August 28, 2008
    Publication date: March 5, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Ki-Back Kim, Jae-Jeong Shim, Geun-Hwi Lim, Chang-Yeon Kim, Yoon-Jeong Ha