Patents by Inventor Geun-Hwi Lim

Geun-Hwi Lim 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: 20060104278
    Abstract: A transmission apparatus and method for compressing headers in a broadband wireless communication system are provided. Upon receiving a packet to which a real-time transport protocol (RTP) header, a user datagram protocol (UDP) header, and an Internet protocol (IP) header are added, from an upper layer, a header compression protocol layer transmits the received packet without compressing the headers at initial transmission, and from the next transmission, compresses the headers according to a compression scheme provided in Internet technology. A header compression convergence sublayer classifies the packet according to initial-header information received from the header compression protocol layer, stores mapping information for the packet classification, and performs packet classification on a header-compressed packet using the mapping information.
    Type: Application
    Filed: November 15, 2005
    Publication date: May 18, 2006
    Inventors: Yong Chang, Hong-Sung Chang, Geun-Hwi Lim, Jun-Hyung Kim, Dong-Ho Cho, Jee-Young Song
  • Patent number: 7039430
    Abstract: A method for controlling operation modes of a medium access control layer by a mobile subscriber station in a broadband wireless access communication system including the mobile subscriber station and a serving base station providing service to the mobile subscriber station is provided. The method includes the steps of: mode-transiting into an idle mode when there is no data transmission between the serving base station and the mobile subscriber station during a predetermined first time interval in an awake mode; detecting movement of the mobile subscriber station in the idle mode into another paging zone covering a target base station, which is different from a paging zone covering the serving base station; and mode-transiting into the awake mode and performing location update together with the target base station when the movement of the mobile subscriber station is detected.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: May 2, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyon-Goo Kang, Bong-Gee Song, Kwang-Seop Eom, Seung-Eun Hong, Yeong-Moon Son, So-Hyun Kim, Seung-Il Yoon, Tae-Won Kim, Geun-Hwi Lim, Jung-Shin Park, Jae-Jeong Shim, Hong-Sung Chang, Yong Chang
  • Publication number: 20060089144
    Abstract: Disclosed is a method and system for transmitting/receiving a neighbor base-station information message in a broadband wireless access system. A base station sets and transmits a neighbor base-station information message, which includes a specific flag field for limiting neighbor base-station information and a reserved field and omits iterative neighbor base-station information depending on a value set in the specific flag field, thereby increasing a transmission efficiency. A mobile terminal receives the neighbor base-station information message from the base station, checks the received message, and then updates an operator ID according to the value set in the specific flag field.
    Type: Application
    Filed: October 26, 2005
    Publication date: April 27, 2006
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jun-Hyung Kim, Hong-Sung Chang, Yong Chang, Geun-Hwi Lim, Jung-Won Kim
  • Publication number: 20060040699
    Abstract: Disclosed is a method and system for forming and transmitting to an MS a broadcast message for notifying information of neighbor BSs in a BWA communication system. The method includes scanning neighbor base stations adjacent to the serving base station, collecting information of the scanned neighbor base stations, comparing a size of the information of the scanned neighbor base stations with a size of a frame for carrying the information of the neighbor base stations constructing at least one broadcast message that includes the information of the neighbor base stations according to a result of the comparison, setting up fields of the constructed broadcast message according to information included in the constructed broadcast message and broadcasting the broadcast message including the setup fields.
    Type: Application
    Filed: August 17, 2005
    Publication date: February 23, 2006
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jun-Hyung Kim, Tae-Won Kim, Hong-Sung Chang, Yong Chang, Geun-Hwi Lim
  • Publication number: 20060034250
    Abstract: Disclosed is a method and system by which a base station without a Global Positioning System (GPS) receiver acquires time synchronization in a Broadband Wireless Access (BWA) communication system. The method includes scanning neighbor base stations around a first base station and requesting time synchronization information from the scanned neighbor base stations by the first base station; receiving responses from predetermined neighbor base stations having already acquired time synchronization from among the neighbor base stations, the responses including time synchronization information of the predetermined neighbor base stations; and selecting a second base station from among the predetermined neighbor base stations and acquiring time synchronization based on the time synchronization information of the second base station.
    Type: Application
    Filed: August 16, 2005
    Publication date: February 16, 2006
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jun-Hyung Kim, Jun-Hyuk Song, Geun-Hwi Lim, Hong-Sung Chang, Yong Chang
  • Publication number: 20060030322
    Abstract: Disclosed is a method for performing handoff by a Mobile Station (MS) in a Broadband Wireless Access (BWA) communication system including a serving Base Station (BS) and at least one neighbor BS adjacent to the serving BS, the serving BS currently providing a service to the MS. The method including receiving physical layer information for communication from said at least one neighbor BS by the serving BS; combining by the serving BS the received physical layer information of said at least one neighbor BS, inserting the physical layer information into an advertisement message, and transmitting the advertisement message to the MS; and receiving by the MS the advertisement message, and performing a handoff according to the physical layer information of said at least one neighbor BS included in the advertisement message when the handoff occurs.
    Type: Application
    Filed: August 4, 2005
    Publication date: February 9, 2006
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jun-Hyung Kim, Geun-Hwi Lim, Jung-Won Kim, Hong-Sung Chang, Yong Chang, Joon-Ho Park
  • Publication number: 20050286407
    Abstract: In a method of configuring connection identifier (CID) update information in a broadband wireless access (BWA) communication system where each service between an mobile station (MS) and a base station (BS) has a unique CID, a registration request message is received from the MS, requesting updating of at least one old CID used for the MS. The CID update information is configured to include a bitmap area indicating whether a service corresponding to the at least one old CID is available, and a new CID area including at least one new CID in correspondence with a predetermined bit value in the bitmap area.
    Type: Application
    Filed: June 23, 2005
    Publication date: December 29, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jung-Shin Park, Geun-Hwi Lim, Hong-Sung Chang, Yong Chang
  • Publication number: 20050288028
    Abstract: Disclosed is a system and method for performing soft handover in a broadband wireless access communication system. An anchor base station transmits first information including channel assignment information of an active non-anchor base station when it is determined that a mobile station is to perform the soft handover, and when there are signals to be transmitted to the mobile station from the non-anchor base station, the non-anchor base station transmits second information including channel assignment information of the anchor base station when it is determined that the mobile station is to perform the soft handover, and when there are signals to be transmitted to the mobile station from the anchor base station, and the mobile station receives signals from the anchor base station and the non-anchor base station corresponding to the first information and the second information when it is determined that the mobile station is to perform the soft handover.
    Type: Application
    Filed: June 24, 2005
    Publication date: December 29, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Geun-Hwi Lim, Jae-Jeong SHIM, Hong-Sung Chang, Yong Chang, Jung-Won Kim
  • Publication number: 20050281247
    Abstract: A method and system for time synchronization between APs in a BWA communication system. According to the method, a second access point acquires a time sync in a broadband wireless access system including a first access point and the second access point. The first access point has already acquired a time sync and the second access point has not acquired the time sync. The method includes the steps of requesting time sync information from the first access point, receiving the time sync information from the first access point, and acquiring the time sync in accordance with the time sync information.
    Type: Application
    Filed: June 21, 2005
    Publication date: December 22, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Geun-Hwi Lim, Hong-Sung Chang, Yong Chang
  • Publication number: 20050255862
    Abstract: A method and system are provided for transmitting broadcast service data in a wireless communication system using an Orthogonal Frequency Division Multiple Access (OFDMA) scheme in which data transmission is achieved through a downlink and an uplink within one frame. The system being connected to a broadcast server. The system and method include allocating a connection identifier (CID) to each broadcast service for identification of a broadcast service packet transmitted over the downlink, and transmitting broadcast service information for each broadcast service; and receiving a broadcast packet from the broadcast server, and transmitting a physical layer transmission information element (DL-MAP) including a broadcast service CID for the broadcast packet through the downlink0.
    Type: Application
    Filed: May 9, 2005
    Publication date: November 17, 2005
    Inventors: Jung-Soo Jung, Yu-Chul Kim, Dae-Gyun Kim, Beom-Sik Bae, Yong Chang, Geun-Hwi Lim, Jung-Je Son
  • Publication number: 20050249142
    Abstract: Disclosed is a method for providing a broadcast service in a mobile communication system including a plurality of cells. The method includes transmitting broadcast program information related to available broadcast programs, broadcast-related information needed for receiving the available broadcast programs, and broadcast zone identification information, to an access terminal; and transmitting the broadcast service to the access terminal.
    Type: Application
    Filed: May 9, 2005
    Publication date: November 10, 2005
    Inventors: Yu-Chul Kim, Geun-Hwi Lim, Beom-Sik Bae, Jung-Soo Jung, Dac-Gyun Kim, Yong-Chang, Jung-Je Son
  • Publication number: 20050232181
    Abstract: Disclosed are a system for transmitting data using a band AMC in a broadband wireless orthogonal frequency multiplexing access system and a method thereof. In a broadband wireless communication system, a method for allocating data bursts to a mobile subscriber station according to channel state in a broadband wireless communication system, the method including transmitting allocation information to the mobile subscriber station, the allocation information including information about a sub frequency band containing the data bursts allocated to the mobile subscriber station and information about the number of band AMC subchannels allocated to the mobile subscriber station in the sub frequency band and receiving the data bursts from the mobile subscriber station according to the allocation information.
    Type: Application
    Filed: March 11, 2005
    Publication date: October 20, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jung-Shin Park, Geun-Hwi Lim, Hong-Sung Chang, Jae-Jeong Shim
  • Publication number: 20050215279
    Abstract: A method for managing a service flow of a mobile subscriber station (MSS) in a serving base station (BS) for a mobile communication system including the serving BS in communication with the MSS through a wireless access channel, and at least one active BS included in an active BS set of the MSS. Upon receiving a service flow management request from the MSS, the serving BS updates a service flow with the MSS, and transmits the updated service flow to the active BS using a predetermined message. Upon receiving a response message for the updated service flow from the active BS, the serving BS transmits service flow information of each active BS included in the response message to the MSS.
    Type: Application
    Filed: March 4, 2005
    Publication date: September 29, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jae-Jeong Shim, Bong-Gee Song, Kwang-Seop Eom, Seung-Eun Hong, Yeong-Moon Son, So-Hyun Kim, Hyon-Goo Kang, Tae-Won Kim, Geun-Hwi Lim, Jung-Shin Park, Seung-Il Yoon, Hong-Sung Chang, Yong Chang
  • Publication number: 20050202822
    Abstract: A method for allocating a safety channel to a handover subscriber station (SS) for data communication in an Orthogonal Frequency Division Multiple Access (OFDMA) communication system. In the method, a base station (BS) determines a bin offset indicating a safety channel to be allocated to the handover SS and the number of subchannels every frame, generates a MAP information element (IE) with a set indicator indicating allocation of the safety channel, the MAP IE including SS identifier information indicating the handover SS, information on the determined bin offset and information on the determined number of subchannels, and transmits the generated MAP IE at a MAP IE transmission time in the frame. The handover SS receives the MAP IE from the BS every frame, and transmits/receives data for a predetermined number of frames in the allocated safety channel according to the MAP IE.
    Type: Application
    Filed: March 11, 2005
    Publication date: September 15, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jung-Shin Park, Geun-Hwi Lim, Hong-Sung Chang, Jee-Jeong Shim
  • Publication number: 20050201309
    Abstract: A method for allocating a band Adaptive Modulation and Coding (AMC) channel in a wireless communication system that divides a full frequency band into a plurality of subcarrier bands and includes subchannels, each of which is a set of a predetermined number of neighbor subcarrier bands. Upon recognizing a need for a band AMC channel, a subscriber station (SS) sends a request for allocation of the band AMC channel to a base station (BS). Upon receiving the band AMC channel allocation request, the BS determines if it can allocate the band AMC channel requested by the SS, considering a resource situation of the BS, and transmits information on the determination to the SS.
    Type: Application
    Filed: March 11, 2005
    Publication date: September 15, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyun-Jeong Kang, Seung-Eun Hong, Hyon-Goo Kang, Hong-Sung Chang, Jung-Shin Park, Chang-Hoi Koo, Geun-Hwi Lim, Sung-Jin Lee, So-Hyun Kim, Yeong-Moon Son, Hyoung-Kyu Lim, Jae-Jeong Shim, Jung-Je Son
  • Publication number: 20050201269
    Abstract: A method for transmitting burst allocation information by a base station in a broadband wireless communication system in which a transmitted frame includes symbols, and orthogonal subcarriers in a frequency axis constitute each of the symbols based on a predetermined time unit. The method includes the steps of generating a reduced connection identifier (CID) by reducing a basic CID of a mobile terminal connected to the base station when the basic CID exists within a preset range, and inserting an MAP, which includes an enabled field representing the reduced CID and one of use and non-use of the reduced CID, into the frame, and transmitting the frame to the mobile terminal.
    Type: Application
    Filed: March 11, 2005
    Publication date: September 15, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jae-Jeong Shim, Geun-Hwi Lim, Hong-Sung Chang, Jung-Shin Park
  • Publication number: 20050201325
    Abstract: A method supporting a Hybrid Automatic Repeat Request (HARQ) between a subscriber station and a base station in a broadband wireless access communication system including. The method includes the steps of: transmitting at least one H-ARQ enabled uplink burst from the subscriber station to the base station; generating ACK/NACK information according to the received HARQ enabled uplink burst at the base station; mapping the generated ACK/NACK information to a bitmap at the base station; transmitting the bitmap through a downlink information from the base station to the subscriber station.
    Type: Application
    Filed: March 14, 2005
    Publication date: September 15, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyon-Goo Kang, Seung-Eun Hong, Yeong-Moon Son, Geun-Hwi Lim, So-Hyun Kim, Chang-Hoi Koo, Jae-Jeong Shim, Jung-Won Kim, Jung-Shin Park, Jung-Je Son, Hong-Sung Chang
  • Publication number: 20050201327
    Abstract: Disclosed is a method for allocating a safety channel in a wireless communication system which divides a full frequency band into a plurality of subcarrier bands and includes subchannels, each of which is a set of a predetermined number of subbands, each of which is a set of a predetermined number of contiguous subcarriers, where the subchannels include a safety subchannel allocated to particular subscriber stations (SSs), which is unused in a neighbor base station. The method comprises the steps of: transmitting, by the SS, its channel quality information to the base station (BS) when a channel quality of a subchannel allocated to the SS is less than to predetermined reference channel quality; and allocating a safety subchannel to the SS, by the BS upon receiving the channel quality information indicating that the channel quality of the subchannel is less than to the reference channel quality.
    Type: Application
    Filed: March 14, 2005
    Publication date: September 15, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: So-Hyun Kim, Seung-Eun Hong, Hyon-Goo Kang, Hong-Sung Chang, Chang-Hoi Koo, Jae-Jeong Shim, Geun-Hwi Lim, Jung-Won Kim, Hyun-Jeong Kang, Sung-Jin Lee, Yeong-Moon Son, Jung-Je Son, Jung-Shin Park, Hyoung-Kyu Lim
  • Publication number: 20050195822
    Abstract: A divided Media Access Control (MAC) protocol structure, a data transmission and reception method, and a handover method and system using the structure in a wireless communication system for efficiently managing session information in handover of an MSS (Mobile Subscriber Station). In the MAC protocol structure, a MAC is divided into a MAC-high layer and a MAC-low layer. The MAC-high layer performs session information-related functions and the MAC-low layer performs functions sensitive to a time delay in relation to handover of an MSS. In the handover method, when an MSS in the wireless communication system performs handover between Access Points (APs), session information is managed at a fixed position by an Access Point Controller (APC) including an MAC-high layer or a serving AP. Therefore, the system load can be reduced and communication quality can be improved.
    Type: Application
    Filed: March 4, 2005
    Publication date: September 8, 2005
    Applicant: SAMSUNG ELECTRONICS., LTD.
    Inventors: Geun-Hwi Lim, Tae-Won Kim, Hong-Sung Chang, Jae-Jeong Shim, Jung-Shin Park, Yong Chang, So-Hyun Kim, Seung-Il Yoon, Yeong-Moon Son
  • Publication number: 20050197125
    Abstract: A method for controlling operation modes of a medium access control layer by a mobile subscriber station in a broadband wireless access communication system including the mobile subscriber station and a serving base station providing service to the mobile subscriber station is provided. The method includes the steps of: mode-transiting into an idle mode when there is no data transmission between the serving base station and the mobile subscriber station during a predetermined first time interval in an awake mode; detecting movement of the mobile subscriber station in the idle mode into another paging zone covering a target base station, which is different from a paging zone covering the serving base station; and mode-transiting into the awake mode and performing location update together with the target base station when the movement of the mobile subscriber station is detected.
    Type: Application
    Filed: March 4, 2005
    Publication date: September 8, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyon-Goo Kang, Bong-Gee Song, Kwang-Seop Eom, Seung-Eun Hong, Yeong-Moon Son, So-Hyun Kim, Seung-Il Yoon, Tae-Won Kim, Geun-Hwi Lim, Jung-Shin Park, Jae-Jeong Shim, Hong-Sung Chang, Yong Chang