Patents by Inventor Ki-Seon Ryu

Ki-Seon 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).

  • Method for transmission and configuration of ranging channel in accordance with a variety of frame structures in radio communication system
    Patent number: 8542625
    Abstract: The present invention relates to configuration procedures and transmission of a ranging channel for a synchronization of an uplink of user equipment and a relay station in a communication system which supports a relay, in that the configuration of the ranging channel for acquiring an uplink synchronization may vary in accordance with a variety of frame structures, thereby reducing uplink interferences and performing an uplink synchronization in a stable and quick manner.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: September 24, 2013
    Assignee: LG Electronics Inc.
    Inventors: Dong-Guk Lim, Jin-Sam Kwak, Ki-Seon Ryu, Jong-Young Han
  • Method for requesting uplink resources and transmitting uplink data
    Patent number: 8542644
    Abstract: A method for requesting uplink resources and transmitting data is provided. The method includes being allocated to a BR code from a BS by an MS, and transmitting a BR indicator in a format without an ID of the MS to the BS using the BR code in non-contention mode by the MS. Because contention-based MSs and non-contention-based MSs transmit different uplink allocation request information, unnecessary information transmission is avoided, which is efficient. Also, information specific to each MS can be transmitted in extra resources.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: September 24, 2013
    Assignee: LG Electronics Inc.
    Inventors: Hee Jeong Cho, Ki Seon Ryu
  • Method for receiving and transmitting a paging message
    Patent number: 8538465
    Abstract: A method for receiving and transmitting a paging message is disclosed. A method for receiving a paging message in an idle mode of a mobile station comprises receiving a paging indicator channel included in a super frame header from a base station; if a paging message of the mobile station exists after identifying the paging indicator, identifying a wake-up time of the mobile station from mapping information of the paging indicator channel; and receiving the paging message from the base station by waking up at the wake-up time. According to the embodiments of the present invention, the paging indicator channel including information useful for the mobile station to receive the paging message is added to the IEEE 802.16m frame structure, whereby the power consumed to receive the paging message can be reduced.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: September 17, 2013
    Assignee: LG Electronics Inc.
    Inventors: Gi Won Park, Ki Seon Ryu, Jeong Ki Kim, Yong Ho Kim, Young Soo Yuk
  • Method of low duty mode operation in a femto base station in consideration of a femto cell type
    Patent number: 8538495
    Abstract: The present invention relates to a broadband wireless access system including a femto cell, and more particularly, to a method of low duty operation in a femto base station. According to one embodiment of the present invention, in a broadband wireless access system, a method of a low duty mode operation of a femto base station saving power includes the steps of determining a low duty mode pattern to be performed by the femto base station according to a preset reference and performing the low duty mode operation according to the determined pattern. In this case, the preset reference can include at least one selected from the group consisting of a battery level, an available resource status and a subscriber type of the femto base station.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: September 17, 2013
    Assignee: LG Electronics Inc.
    Inventors: Gi Won Park, Yong Ho Kim, Ki Seon Ryu, Jin Lee
  • Security performance negotiation method and a TEK management method
    Patent number: 8538025
    Abstract: The present invention relates to methods for sending and receiving security related information during handover on a wireless access system and methods for managing a traffic encoding key (TEK). In one example of the present invention, a security performance negotiation method for supporting the hand-over of mobile handsets comprises the steps of: carrying out, in advance, a security performance negotiation procedure with a first base station (T-ABS), prior to registration on the first base station; generating a traffic encoding key (TEK) by using security related information acquired by means of the security performance negotiation procedure; and carrying out a general performance exchange procedure encoded by means of the TEK and a zone switch with the first base station.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: September 17, 2013
    Assignee: LG Electronics Inc.
    Inventors: Gene Beck Hahn, In Uk Jung, Ki Seon Ryu
  • Method of executing handover in a mobile communication system
    Patent number: 8538432
    Abstract: Disclosed are methods of executing a handover related operation in a power saving mode in accordance with handover triggering information. One of the methods of executing handover of a mobile station in a mobile communication system comprises determining an enabled status of at least one handover related operation in a specific operation mode between the mobile station (MS) and a network, receiving control information related to the at least one handover related operation from the network, entering the specific operation mode, changing the enabled status of the at least one handover related operation in the specific operation mode, and performing the enabled handover related operation in accordance with the changed enabled status and the control information.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: September 17, 2013
    Assignee: LG Electronics Inc.
    Inventors: Moon Il Lee, Jin Hyuk Jung, Jae Won Jang, Jin Young Chun, Bin Chul Ihm, Ki Seon Ryu, Yong Ho Kim, Jeong Ki Kim
  • Method and mobile device for transmitting and receiving paging messages
    Patent number: 8532671
    Abstract: A method and mobile device of performing idle mode operation carried. The method includes receiving a first paging information of a first paging group and a second paging information of a second paging group from at least one base station. Entering idle mode at a first coverage belonging to the first paging group and starting a first timer for a periodic location update. Determining a paging group of a currently preferred base station. Starting a second timer, if the paging group of the currently preferred base station is determined to be the second paging group and performing location update when the second timer expires.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: September 10, 2013
    Assignee: LG Electronics Inc.
    Inventors: Gi Won Park, Yong Ho Kim, Ki Seon Ryu
  • Handover support method using dedicated ranging code
    Patent number: 8532057
    Abstract: The present invention discloses a variety of methods of supporting handover in a wireless access system. A handover support method according to an embodiment of the present invention includes the steps of: transmitting a handover request message to a first base station (serving base station); receiving a handover response message (UL grant or UL-MAP message) containing authentication information (M) from a second base station (target base station); deriving a dedicated code index (DCI) for instructing a dedicated ranging code by using the authentication information (M); transmitting the dedicated ranging code to the second base station on a non-contention basis; and receiving a ranging response message as a response for the dedicated ranging code.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: September 10, 2013
    Assignee: LG Electronics Inc.
    Inventors: Young Soo Yuk, Ki Seon Ryu, In Uk Jung, Yong Ho Kim
  • Method for feedback to uplink allocation request
    Patent number: 8532044
    Abstract: A method for a feedback to an uplink allocation request is disclosed. The method for a feedback to an uplink allocation request comprises receiving a bandwidth request (BR) of the mobile station in a base station; detecting codes from the bandwidth request; and transmitting a BR result report to a mobile station, the BR result report indicating detection failure when detecting the codes or code repetition. According to the embodiment of the present invention, it is advantageous in that a wait time of a timer can be reduced as the base station directly reports the result of the bandwidth request or the mobile station to the mobile station, whereby retransmission of the bandwidth request can be performed promptly.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: September 10, 2013
    Assignee: LG Electronics Inc.
    Inventors: Hee Jeong Cho, Ki Seon Ryu
  • Method for allocating dynamic transmit time interval
    Patent number: 8532083
    Abstract: A method for allocating various transmit time intervals (TTIs) if a sub-frame structure is used, in a radio access system is provided. A transmitter transmits a super frame header including TTI information of a sub-frame included in a super frame to a receiver and transmits a sub-map including resource allocation information to the receiver, thereby dynamically allocating the TTI. Since the TTI information may not be received via the sub-map in every sub-frame, it is possible to prevent waste of a radio resource.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: September 10, 2013
    Assignee: LG Electronics Inc.
    Inventors: Jeong Ki Kim, Ki Seon Ryu, Young Soo Yuk
  • Method of communication supporting half-duplex frequency division duplex
    Patent number: 8531999
    Abstract: A communication supporting half-duplex frequency division duplex and receiving a broadcast message. A control signal for a broadcast message is received and decoded partially or entirely according to an indication bit included in the control signal.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: September 10, 2013
    Assignee: LG Electronics Inc.
    Inventors: Jin Young Chun, Bin Chul Ihm, Jin Sam Kwak, Ki Seon Ryu
  • METHOD FOR UPDATING LOCATION IN A WIRELESS COMMUNICATION SYSTEM
    Publication number: 20130231134
    Abstract: A method for updating a location in a wireless communication system is disclosed. The method includes transmitting a request message to enter idle mode, receiving a response message including an Identifier (ID) of a first paging group and an ID of a second paging group in response to the request message, activating a paging group location update timer, when the MS leaves an area of the first paging group, and updating a location according to the paging group location update timer.
    Type: Application
    Filed: April 15, 2013
    Publication date: September 5, 2013
    Applicant: LG ELECTRONICS INC.
    Inventors: Gi Won PARK, Tae Gon KONG, Yong Ho KIM, Ki Seon RYU
  • Method of allocating radio resource in broadband wireless access system
    Patent number: 8521171
    Abstract: A method for allocating resource regions in a wireless access system. This method collectively allocates resources in non-consecutive frames. Specifically, a message, including allocation information used to collectively and non-consecutively allocate identical resource regions, is received from a base station and data is transmitted or received through the allocated resource regions. Since identical resource regions are collectively allocated in multiple frames, it is possible to reduce both the number of transmissions of a MAP message and MAP overhead in a network.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: August 27, 2013
    Assignee: LG Electronics Inc.
    Inventors: Jeong Ki Kim, Ki Seon Ryu, Hee Jeong Cho, Jae Won Lim, Sung Woong Ha, Chang Hun Lee
  • Method of emergency communication in broadband radio access system
    Patent number: 8514747
    Abstract: A method of emergency communication between a mobile station and a base station in a broadband radio access system and a mobile station which supports the method of emergency communication are disclosed. The method of emergency communication is divided into a case where the mobile station requests an emergency service in a state that the mobile station is registered with the base station and a case where the mobile station requests an emergency service in a state that the mobile is not registered with the base station. In case of the one case, the mobile station requests the base station of an emergency service using a newly defined emergency code or a conventional bandwidth request code and negotiates a basic function required for an emergency service with the base station through predetermined header data.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: August 20, 2013
    Assignee: LG Electronics Inc.
    Inventors: Ae Ran Youn, Yong Ho Kim, Ki Seon Ryu
  • Method for supporting coexistence in a mobile station
    Patent number: 8514823
    Abstract: A method for supporting coexistence in a mobile station is provided. The method for supporting coexistence in the mobile station includes, at the mobile station, turning on Bluetooth at a start point of a WiMAX downlink subframe, stopping the operation of the Bluetooth if WiMAX channel quality of the mobile station becomes less than a threshold value during the operation of the Bluetooth, and, at the mobile station, turning off the operation of the Bluetooth at the start point of a WiMAX uplink subframe. Accordingly, it is possible to solve fragmentation by minimizing the interruption of the WiMAX transmission/reception and to improve WiMAX downlink throughput by restricting Bluetooth data transmission/reception according to the WiMAX channel quality.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: August 20, 2013
    Assignee: LG Electronics Inc.
    Inventors: Won Yong Yoon, Sung June Youn, Ki Seon Ryu, Hyo Sik Lee
  • Periodic ranging in a wireless access system for mobile station in sleep mode
    Patent number: 8514757
    Abstract: A method of performing a ranging process between a base station and a mobile station in sleep mode in a wireless access system, wherein the base station provides the mobile station with an initial notification of a periodic ranging time that occurs during a sleep time interval and during which the mobile station is to perform the ranging process, the initial notification included in a first message, the first message indicating whether the mobile station should terminate sleep mode to receive downlink data, and wherein the base station provides the mobile station with subsequent notifications of periodic ranging times that occur during the sleep time interval, the subsequent notifications indicated in a second message, the second message transmitted to the mobile station as part of the ranging process such that the mobile station performs a plurality of ranging processes within the sleep time interval.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: August 20, 2013
    Assignee: LG Electronics Inc.
    Inventors: Chang-Jae Lee, Ki-Seon Ryu, Beum-Joon Kim
  • Method of transmitting messages in communication networks
    Patent number: 8514807
    Abstract: A method of transmitting messages for acquisition of information related to a specific network entity or a link network during network selection in a mobile terminal is disclosed.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: August 20, 2013
    Assignee: LG Electronics Inc.
    Inventors: Yong Ho Kim, Jin Lee, Ki Seon Ryu, Jeong Ki Kim
  • Method and apparatus of transmitting and receiving system information in a wireless system
    Patent number: 8509149
    Abstract: A method and apparatus for transmitting and receiving system information in a wireless communication system are disclosed. A method for receiving system information by a mobile station (MS) of a wireless communication system includes receiving a secondary superframe header (S-SFH) change cycle from a base station (BS), and receiving a primary superframe header information element (P-SFH IE) including a first field indicating a change count of a plurality of secondary superframe header subpacket information elements (S-SFH SP IEs) from the base station (BS). Once each of the plurality of S-SFH SP IEs is changed, each of the plurality of S-SFH SP IEs remains unchanged during one or more S-SFH change cycles.
    Type: Grant
    Filed: January 4, 2011
    Date of Patent: August 13, 2013
    Assignee: LG Electronics Inc.
    Inventors: Hee Jeong Cho, Ki Seon Ryu, Jin Soo Choi, Yong Ho Kim, Young Soo Yuk
  • Method for efficiently performing multi-BS MIMO operation in a broadband wireless access system
    Patent number: 8494079
    Abstract: A method for determining temporary Base Station (BS) Identifiers (IDs) to efficiently set a multi-BS Multiple Input Multiple Output (MIMO) transmission mode and an apparatus for implementing the same in a broadband wireless access system are disclosed. To perform a multi-BS MIMO operation, a Mobile Station (MS) receives a first broadcast message including system information about a plurality of neighbor BSs from a serving BS, receives a second broadcast message including BS set information from the serving BS, the BS set information specifying indexes of one or more neighbor BSs which can be involved in the multi-BS MIMO operation among the plurality of neighbor BSs, and determines a temporary BS ID of each BS included in the BS set information using the specified indexes.
    Type: Grant
    Filed: August 19, 2010
    Date of Patent: July 23, 2013
    Assignee: LG Electronics Inc.
    Inventors: In Uk Jung, Wook Bong Lee, Yong Ho Kim, Ki Seon Ryu
  • Method for controlling power saving mode of UE in the mobile communication system
    Patent number: 8494594
    Abstract: A method for controlling, a power saving mode of a mobile station (MS) in a mobile communication system is disclosed. The method differently defines operations of power saving modes of individual cases in association with message traffic distinguished from user traffic of a service, so that it can effectively reduce power consumption of the mobile station (MS). Firstly, the listening window of the power saving mode is used. Secondly, a method for transmitting a request message for pending the sleep mode is used. If the sleep-mode pending is requested, the sleep-mode resume message may be used in the case of a reactivation, or the reactivation can be automatically performed if a current time reaches a predetermined time.
    Type: Grant
    Filed: February 11, 2008
    Date of Patent: July 23, 2013
    Assignee: LG Electronics Inc.
    Inventors: Ki Seon Ryu, Yong Ho Kim, Jeong Ki Kim