Patents by Inventor Byung-Han Ryu

Byung-Han Ryu 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: 8560025
    Abstract: Provided is a method and apparatus for discontinuously transmitting/receiving packets for low-power consumption of a terminal in a cellular system for packet transmission. The present invention provides a method and apparatus that can perform a low-power consuming operation when a terminal is in active state in a cellular system. The method for discontinuously transmitting/receiving packet data to reduce power consumption of a terminal in a cellular system, including the steps of: a) establishing discontinuous transmission/reception (DTX/DRX) parameters including discontinuous DTX/DRX cycle information for terminals operating in a transmission suspension mode, which is a sub-state of an active state; and b) performing DTX/DRX based on the DTX/DRX parameters in the terminals operating in the transmission suspension mode.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: October 15, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jae-Heung Kim, Jung-Im Kim, Kyoung-Seok Lee, Byung-Han Ryu, Seung-Chan Bang
  • Patent number: 8514831
    Abstract: Provided is a timer-based resource requesting method in a mobile telecommunication system. The resource requesting method includes the steps of: a) waiting in a waiting mode for an event to occur while a timer of a terminal operates; b) transmitting scheduling information including information on a quantity of packets existing in a terminal buffer to a base station when operation of the timer ends at a predetermined threshold time; and c) initializing the timer.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: August 20, 2013
    Assignees: Electronics and Telecommunications Research Institute, Samsung Electronics Co., Ltd.
    Inventors: Geon-Min Yeo, Byung-Han Ryu
  • Publication number: 20130157712
    Abstract: Provided is a method of managing mobility of a user equipment. The method includes: establishing by a first base station a communication with the user equipment; transmitting by the first base station a Coordinated Multiple Point (CoMP) addition request to a second base station; establishing by the first and second base stations a CoMP communication with the user equipment according to the CoMP addition request; transmitting by the first base station an anchor cell change request to the second base station; and operating the second base station as an anchor cell of the CoMP communication according to the anchor cell switch request.
    Type: Application
    Filed: September 13, 2012
    Publication date: June 20, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: SoonGi PARK, Byung-Han RYU, Nam Hoon PARK, Jun Sik KIM, Sang Chul OH, Hong Soog KIM, Kyung Sook KIM, Young Jick BAHG, Sung Gu CHOI
  • Publication number: 20130148523
    Abstract: Disclosed is a carrier wave allotting method of an operation and maintenance system in a wireless communication network. The carrier wave allotting method includes searching a wireless resource of the wireless communication network; updating cell information indicating information of cells of the wireless communication network; searching an access mode of a station connected with the operation and maintenance system; searching a wireless capacity of the station; and allotting a carrier wave to the station according to the wireless resource, the cell information, the access mode, and the wireless capacity.
    Type: Application
    Filed: July 31, 2012
    Publication date: June 13, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jun Sik KIM, Kyong Tak CHO, Byung-Han RYU, Nam Hoon PARK
  • Publication number: 20130150042
    Abstract: Disclosed is an operating method of a femto base station which includes broadcasting a plurality of public land mobile network (PLMN) identities; broadcasting a plurality of closed subscriber group (CSG) identities correlated with the plurality of PLMN identities; and establishing wireless communication with user equipment based on the broadcasted PLMN and CSG identities.
    Type: Application
    Filed: July 23, 2012
    Publication date: June 13, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Sang Chul OH, Seung-Que Lee, Hyung Deug Bae, Jun Sik Kim, Kyong Tak Cho, Byung-Han Ryu, Nam Hoon Park
  • Publication number: 20130150127
    Abstract: Disclosed is a wireless communication base station which includes a plurality of radio units configured to transmit and receive a radio signal; and a digital unit connected to the plurality of radio units via cables and configured to operate a communication protocol. The digital unit controls the plurality of radio units according to a communication environment to be switched into a merge state in which the plurality of radio units forms a cell, or an independent state in which the plurality of radio units forms different cells, respectively.
    Type: Application
    Filed: September 13, 2012
    Publication date: June 13, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jun Sik KIM, Kyong Tak CHO, Byung-Han RYU, Nam Hoon PARK
  • Publication number: 20130150057
    Abstract: Provided is a method of assigning a physical layer cell identity (PCI) to a femtocell base station. The method includes obtaining location information from a femtocell base station and storing the location information, a first step of determining whether a PCI does not collide and is not confused with PCIs of base stations present in an area having a radius of a first multiple of a the femtocell radius and a second step of determining whether a PCI does not collide and is not confused with PCIs of base stations present in an area having a radius of a second multiple of the femtocell radius when a PCI does not collide and is not confused with PCIs of base stations is not found in an area having a radius of a first multiple of the femtocell radius.
    Type: Application
    Filed: May 1, 2012
    Publication date: June 13, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Eun Seon CHO, Byung Han RYU, Nam Hoon PARK, Chan Yong LEE, Hyeon Ju OH, Hong Soog KIM
  • Publication number: 20130150021
    Abstract: Disclosed is a femto base station gateway which includes an X2 interface configured to perform X2 communication; an S1 interface configured to perform S1 communication; and an X2 cache configured to store an X2 response message received via the X2 interface.
    Type: Application
    Filed: July 23, 2012
    Publication date: June 13, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Sang Chul OH, Byung-Han RYU
  • Publication number: 20130150023
    Abstract: Disclosed is a handover controlling method in which a station controls a handover of user equipment. The handover controlling method includes receiving a handover request including location information from the user equipment; and comparing the location information with handover histories previously executed at the station to control a handover of the user equipment according to a comparison result.
    Type: Application
    Filed: September 11, 2012
    Publication date: June 13, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Hong Soog KIM, Byung-Han RYU, Nam Hoon PARK
  • Patent number: 8462706
    Abstract: The subscriber station of claim 15, wherein the uplink data includes data to be transmitted, and a header having information on the data and the subscriber, and the uplink data generator adds the subheader includDisclosed is a method and device for requesting and reporting channel quality information in a mobile communication system. An uplink radio resource for a subscriber station having data to transmit is allocated and a CQI indicator for requesting channel quality information is added to the allocation information to be transmitted to a subscriber station. The subscriber station having received the uplink radio resource allocation information generates channel quality information by measuring the radio channel quality for communication with the base station according to existence of the indicator and transmits desired uplink data having the generated channel quality information to the base station.
    Type: Grant
    Filed: February 2, 2005
    Date of Patent: June 11, 2013
    Assignees: Electronics and Telecommunications Research Institute, Samsung Electronics Co., Ltd, KT Corporation, SK Telecom Co., Ltd, KTFreetel Co., Ltd, Hanaro Telecom., Inc.
    Inventors: Chul-Sik Yoon, Jae-Heung Kim, Kun-Min Yeo, Soon-Yong Lim, Byung-Han Ryu
  • Patent number: 8402333
    Abstract: A data transmission device transmits coded packets and a code for decoding the coded packets to a receiving device. The data transmission device retransmits the coded packets and the code to the receiving device when failing to receive feedback information on a decoding success state of the coded packets from the receiving device. Accordingly, the data transmission device can increase the radio resource efficiency in the wireless communication system.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: March 19, 2013
    Assignees: Electronics and Telecommunications Research Institute, Samsung Electronics Co., Ltd.
    Inventors: Kang-Hee Kim, Byung-Han Ryu
  • Patent number: 8379600
    Abstract: The present invention provides a method for resource allocation in a wireless communication system. In the method for resource allocation, a scheduler of a base station decides on a modulation scheme and an encoding scheme according to channel quality information (CQI), and decides on a number of allocated resource blocks according to transmission data size referring to a table of resource block allocation. The table of resource block allocation presents a number of allocated resource blocks and a number of transmission bits according to the number of allocated resource blocks.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: February 19, 2013
    Assignees: Electronics and Telecommunications Research Institute, KT Corporation
    Inventors: Keun Young Kim, Byung-Han Ryu, Seung Chan Bang
  • Patent number: 8374145
    Abstract: A method for requesting and reporting channel quality information (CQI) in a wireless portable Internet system is disclosed. Timing of a channel quality information request by a base station is determined, existence of an automatic repeat request acknowledgment (ARQ_ACK) message of downlink data is determined on requesting the channel quality information from the subscriber station, the automatic repeat request acknowledgment message and the radio resource for the channel quality report to the subscriber station is allocated, the automatic repeat request acknowledgment message and the channel quality report information is received, and a modulating and coding level of downlink data is determined by extracting the channel quality report information form the automatic repeat request acknowledgment message.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: February 12, 2013
    Assignees: Electronics and Telecommunications Research Institute, Samsung Electronics Co., Ltd, KT Corporation, SK Telecom Co., Ltd, KT Freetel Co., Ltd, Hanaro Telecom., Inc.
    Inventors: Chul-Sik Yoon, Jae-Heung Kim, Kun-Min Yeo, Soon-Yong Lim, Byung-Han Ryu
  • Patent number: 8363625
    Abstract: The present invention relates to a resource request and a packet scheduling method for uplink traffic in a mobile communication system. For efficient scheduling of the uplink traffic, a base station and user equipment (UE) determines a scheduling method according to characteristics of the traffic when performing negotiation therebetween. The traffic may be classified into traffic that generating a fixed-size packet in a periodical time interval, traffic that generates a variable-size packet in a periodic time interval, and traffic that generates a variable-size packet in a random time interval. Therefore, the UE requests a resource in accordance with the characteristics of the traffic and the base station performs scheduling according to the characteristics of the traffic such that an optimal uplink packet scheduling can be achieved.
    Type: Grant
    Filed: August 25, 2006
    Date of Patent: January 29, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Geon-Min Yeo, Byung-Han Ryu
  • Publication number: 20130007728
    Abstract: The present invention relates to a short range wireless communication device for providing an application service based on an area. In particular, an apparatus for providing an application service based on an area in a small cell including a femtocell base station or a WiFi Access Point, the apparatus including a communication unit to receive a list of application services from an Application Service Provisioning Server, select and download at least one application service from the received list, an application service database to store the at least one downloaded application service, a service controller to install the at least one downloaded application service, or uninstall an installed application service, a user equipment access detector to detect a user equipment entering or exiting a service area, and a user equipment database to store an identifier and information of the user equipment entering or exiting the service area.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 3, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Hyeon Ju OH, Chan Yong LEE, Eun Seon CHO, Byung Han RYU, Nam Hoon PARK
  • Publication number: 20130003633
    Abstract: Provided is a method and apparatus for discontinuously transmitting/receiving packets for low-power consumption of a terminal in a cellular system for packet transmission. The present research provides a method and apparatus that can perform a low-power consuming operation when a terminal is in active state in a cellular system. The method for discontinuously transmitting/receiving packet data to reduce power consumption of a terminal in a cellular system, including the steps of: a) establishing discontinuous reception/transmission (DRX/DTX) parameters including discontinuous DRX/DTX cycle information for terminals operating in a transmission suspension mode, which is a sub-state of an active state; and b) performing DRX/DTX based on the DRX/DTX parameters in the terminals operating in the transmission suspension mode.
    Type: Application
    Filed: September 12, 2012
    Publication date: January 3, 2013
    Applicants: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, KT CORPORATION, SK TELECOM CO., LTD.
    Inventors: Jae-Heung KIM, Byung-Han Ryu, Seung-Chan Bang
  • Publication number: 20120314668
    Abstract: The present application relates to a scheduling device and method of a mobile communication system. In the packet scheduling method, a base station performs packet scheduling for a terminal station in a mobile communication system, and a transport channel comprising an uplink shared channel (UL-SCH) and a physical channel comprising an uplink grant channel (UL-GCH) between the terminal and the base station are classified into a plurality of channels. In addition, in the packet scheduling method: a) the base station receives scheduling information from the terminal; b) the base station allocates an uplink resource for uplink traffic transmission for terminal based on the received scheduling information; and c) information for the allocated uplink resource is transmitted to the terminal through the UL-GCH of the physical channel.
    Type: Application
    Filed: July 2, 2012
    Publication date: December 13, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Geon-Min YEO, Byung-Han RYU
  • Patent number: 8305945
    Abstract: A method and apparatus for discontinuously transmitting or receiving packets for low-power consumption of a terminal in a cellular system for packet transmission, for example, a method for performing discontinuous reception operation of a terminal in a wireless communication system, including: receiving parameters for performing the discontinuous reception operation from the base station; and performing, in a state being capable of transmitting or receiving data to or from the base station, the discontinuous reception operation based on the received parameters.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: November 6, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jae-Heung Kim, Byung-Han Ryu, Seung-Chan Bang
  • Patent number: 8301953
    Abstract: The present invention relates to a resource allocation device for minimizing delay of an uplink retransmission resource allocation process in a wireless communication system having a high data rate, and a method thereof. In the method, user data are received and an ACK/NACK state of the received data is determined, and when the NACK state of the received data is determined, retransmission resource allocation is requested, retransmission resources are allocated, and retransmission resource allocation information is generated to be transmitted.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: October 30, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kang-Hee Kim, Byung-Han Ryu
  • Publication number: 20120244878
    Abstract: The present invention provides a method including two operations of a first operation and a second operation. The first operation may determine between a terminal located in a space including the small base station and a terminal located in a space excluding the small base station based on a value reported by a terminal. The second operation may be performed using information received from a neighboring macro base station in response to the determination failing to be performed in the first operation, thereby ultimately discriminating between an area including the small base station and an area excluding the small base station corresponding to a location of a terminal.
    Type: Application
    Filed: March 23, 2012
    Publication date: September 27, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Kyong Tak CHO, Jun Sik KIM, Byung Han RYU, Nam Hoon PARK