Patents by Inventor Jin-Youn Cho

Jin-Youn Cho 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: 7350125
    Abstract: An HARQ method for guaranteeing a QoS in a wireless communication system is provided. In a transmitting apparatus using a HARQ for transmitting packet data in a wireless communication system, a retransmission controller determines the size of redundancy information for correcting transmission errors in packet data, and a transmitter transmits the redundancy information of the determined size upon request for a retransmission of the packet data. Transmission of redundancy information of a variable size at each retransmission satisfies the QoS required for each user, maximizes a data throughput, and allows for the efficient reception of an ACK or a NACK for the redundancy information.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: March 25, 2008
    Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
    Inventors: Kyung-Hun Jang, Chang-Woo Seo, Jin-Youn Cho, Ki-Ho Lee, Dong-Ho Cho, Tae-Soo Kwon, Ae-Ri Lim, Ki-Hyun Pyun, Kyung-Ho Hwang
  • Publication number: 20070202880
    Abstract: A terminal location estimation method in a wireless communication system in which an access point (AP) provides an access service to a plurality of terminals includes defining a plurality of beam spaces around the AP through space multiplexing; scheduling the beam spaces according to a predetermined pattern; simultaneously forming a beam in at least one beam space; and detecting the existence and location of a terminal according to whether a response message in response to the formed beam is received. Accordingly, an AP forms beams in a predetermined scheduling pattern, and each of the terminals detecting the beams registers its location by informing the AP that each of the terminals exists in a relevant beam area, and thus, a location of each of the terminals can be estimated without using a complex DOA algorithm.
    Type: Application
    Filed: January 12, 2007
    Publication date: August 30, 2007
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chang-Woo Seo, Jin-Youn Cho, Dong-Jun Lee, Kyung-Hun Jang, Gang-Youl Yu
  • Publication number: 20070016413
    Abstract: Provided is a coding/decoding apparatus for an orthogonal frequency division multiple access (OFDMA) communication system that takes multiple users into consideration and uses block coding/decoding scheme. In the apparatus, a mapper determines paths through which information of users will be provided, according to states of sub-channels allocated to the users. A coding/decoding unit parallel-processes the information of the users through the paths selectively connected by the mapper. The coding/decoding unit includes coders/decoders having performance lower than the maximum processing performance determined taking into account a size of a processing block and the number of sub-channels.
    Type: Application
    Filed: June 1, 2006
    Publication date: January 18, 2007
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chang-Woo Seo, Jin-Youn Cho, Jae-Kon Lee, Sung-Hyun Cho, Young-Ho Jung, Hyo-Sun Hwang
  • Publication number: 20060145293
    Abstract: A semiconductor device and a method for fabricating the same are provided. The method includes: forming a contact plug passing through an inter-layer insulation layer; sequentially forming a lower electrode layer, a dielectric layer and an upper electrode layer on the inter-layer insulation layer; patterning the upper electrode layer; patterning the dielectric layer and the lower electrode layer, thereby obtaining a capacitor including an upper electrode, a patterned dielectric layer and a lower electrode; and sequentially forming a first metal interconnection line connected with the contact plug and second metal interconnection lines connected with the capacitor.
    Type: Application
    Filed: December 12, 2005
    Publication date: July 6, 2006
    Inventor: Jin-Youn Cho
  • Publication number: 20060126497
    Abstract: A method of re-transmitting a packet of an access point (AP) in a polling-based Wireless Local Area Network (WLAN) includes: scheduling a super frame to form a first period of providing a polling message to arbitrary stations at the AP and allowing only stations receiving the polling message to get access to a medium without contention, and to form a second period of allowing the stations to get access to the medium through contention; transmitting packets stored in a first transmission queue to the corresponding stations during the first period of the super frame; and enqueuing a packet whose transmission results in failure during a first portion of a second transmission queue to re-transmit the packet whose transmission has resulted in failure during the second period upon a determination that at least one of the packets transmitted to the stations has resulted in a failure to be transmitted.
    Type: Application
    Filed: November 4, 2005
    Publication date: June 15, 2006
    Inventors: Sung-Guk Na, Rae-Jin Uh, Jin-Youn Cho, Mi-Ra Choe
  • Publication number: 20060023684
    Abstract: A Medium Access Control (MAC) apparatus and method for use in a channel overlay network of a wireless access system. The wireless access system, which is based on a multi-carrier, includes a plurality of physical modules for receiving signals from a plurality of terminals, a plurality of MAC (Medium Access Control) modules for processing the signals received via the physical modules while being classified according to predetermined traffic classes, and a controller connected to the MAC modules for integratedly managing the MAC modules. The MAC apparatus includes an additional MAC module used for a control channel and a plurality of MAC modules for supporting various QoS traffic data according to individual classes, thereby improving scheduling complexity in a MAC layer.
    Type: Application
    Filed: July 29, 2005
    Publication date: February 2, 2006
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chang-Woo Seo, Kyung-Hun Jang, Jin-Youn Cho, Hyo-Sun Hwang
  • Publication number: 20050265287
    Abstract: A handoff method is provided in a communication network including a plurality of fixed nodes attached to a router connected to at least one external network, and at least one mobile node associated with a current fixed node. The method detects movement of a mobile node; prepares a handoff of the mobile node from a current fixed node to potential fixed nodes upon detecting movement of the mobile node; decides whether to handoff to one of the potential fixed nodes as a target fixed node; and performs the handoff from the current fixed node to the target fixed node. The handoff method enables the mobile station to quickly move its association from one access point to another by minimizing a probe delay which is a primary contributor to handoff delay.
    Type: Application
    Filed: May 31, 2005
    Publication date: December 1, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Choong-Hun Lee, Kyung-Hun Jang, Chang-Woo Seo, Jin-Youn Cho, Hyo-Sun Hwang, Sung-Jea Ko, Chun-Su Park
  • Publication number: 20050122898
    Abstract: An HARQ method for guaranteeing a QoS in a wireless communication system is provided. In a transmitting apparatus using a HARQ for transmitting packet data in a wireless communication system, a retransmission controller determines the size of redundancy information for correcting transmission errors in packet data, and a transmitter transmits the redundancy information of the determined size upon request for a retransmission of the packet data. Transmission of redundancy information of a variable size at each retransmission satisfies the QoS required for each user, maximizes a data throughput, and allows for the efficient reception of an ACK or a NACK for the redundancy information.
    Type: Application
    Filed: November 5, 2004
    Publication date: June 9, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung-Hun Jang, Chang-Woo Seo, Jin-Youn Cho, Ki-Ho Lee, Dong-Ho Cho, Tae-Soo Kwon, Ae-Ri Lim, Ki-Hyun Pyun, Kyung-Ho Hwang
  • Publication number: 20050030930
    Abstract: A method for transmitting data at a high rate in a wireless LAN is provided. A wireless access point requests reliable node information from a wireless terminal having a transfer rate equal to or less than a predetermined transfer rate if data to be transmitted to the terminal occurs. The terminal produces a frame containing information related to reliable nodes that can communicate with the terminal and information of greatest transfer rates between the reliable nodes and the terminal, and transmits the frame to the access point. The access point selects an optimal relay node from the reliable nodes, based on the greatest transfer rates between the reliable nodes and the access point and transfer rates between the reliable nodes and the terminal, and determines if a relay gain exists when using the optimal node. If the relay gain exists, the access point performs relay transmission to the terminal; otherwise, it performs direct transmission to it.
    Type: Application
    Filed: July 26, 2004
    Publication date: February 10, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jin-Youn Cho, Chang-Woo Seo, Jin-Bong Chang, Kyung-Hun Jang, Hyo-Sun Hwang
  • Publication number: 20050025106
    Abstract: A method and apparatus controls power consumption of stations having a hierarchical structure when the stations transmit and receive a wireless signal to and from one another on a CSMA/CA wireless LAN. The controlling involves extracting information on frame transmission speed and transmission period information on first and second layers of the hierarchical structure from the wireless signal; determining a power-controlled period for each of the first and second layers based on the extracted information; and reducing the power consumption of the first and second layers by switching a current mode of the first and second layers to a predetermined mode for the power-controlled period if a reception address included in the extracted information is not identical to an address of the station.
    Type: Application
    Filed: July 27, 2004
    Publication date: February 3, 2005
    Inventors: Chang-woo Seo, Jin-youn Cho, Kyung-hun Jang, Jin-bong Chang, Hyo-sun Hwang, Sang-hyun Woo
  • Publication number: 20050003856
    Abstract: Local communication system in wireless communication system includes a main wireless terminal negotiating with each of the peripheral wireless terminals during a time period for which a frame will be transmitted, generating a schedule map including negotiated time information and a transmission sequence of each of the peripheral wireless terminals, and transmitting the generated schedule map to all peripheral wireless terminals; and the peripheral wireless terminals storing the schedule map received from the main wireless terminal, and performing communication with the main wireless terminal according to the sequence determined in the schedule map for the negotiated time period.
    Type: Application
    Filed: June 2, 2004
    Publication date: January 6, 2005
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung-Hun Jang, Chang-Woo Seo, Jin-Bong Cahng, Jin-Youn Cho, Hyo-Sun Hwang