Patents by Inventor Chul-Sik Yoon

Chul-Sik Yoon 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: 20130029697
    Abstract: A base station allocates a paging group to a mobile station. The base station transmits, to a mobile station, a first message including indices of a plurality of carriers and information for the plurality of carriers and a second message including paging group information representing whether each of a plurality of carriers supports each of one or more paging groups. Then, the base station selects a paging transmission carrier for the mobile station from among at least one paging carrier corresponding to the paging group allocated to the mobile station and transmits the paging message through the paging transmission carrier.
    Type: Application
    Filed: April 20, 2011
    Publication date: January 31, 2013
    Inventors: Soojung Jung, Eunkyung Kim, Jae Sun Cha, Sung Cheol Chang, Hyun Lee, Chul Sik Yoon
  • Publication number: 20130022199
    Abstract: A method for performing direct communication between terminals includes: a transmitting terminal's encrypting data using a direct communication transport encryption key (DTEK) for direct communication; and transmitting the encrypted data to a receiving terminal, wherein the DTEK is managed in an SA (security association) defined within the transmitting terminal or the receiving terminal.
    Type: Application
    Filed: July 18, 2012
    Publication date: January 24, 2013
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Eunkyung KIM, Sung Cheol CHANG, Sung Kyung KIM, Won-Ik KIM, Mi Young YUN, Hyun LEE, Chul Sik YOON, Kwang Jae LIM
  • Patent number: 8358715
    Abstract: The present invention relates to a quasi-orthogonal space-time block coding system and method. The system does not become particularly complicated since the encoding rate is given as 1 and it is possible to decode the encoded signal by using a simple linear algorithm, and system performance is increased since there is no interference component of an adjacent signal in the estimated signal.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: January 22, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kwang Jae Lim, Soo Young Kim, Jing Li, Chul Sik Yoon
  • Publication number: 20130016646
    Abstract: A method in which a first terminal supports direct communication using infracommunication includes setting at least one direct communication link with at least one second terminal, setting at least one traffic connection with a base station, and forwarding data that is transmitted through the at least one direct communication link from the at least one second terminal to the at least one traffic connection or forwarding data that is transmitted through the at least one traffic connection from the base station to the at least one direct communication link.
    Type: Application
    Filed: July 12, 2012
    Publication date: January 17, 2013
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sung Cheol CHANG, Mi Young YUN, Eunkyung KIM, Sung Kyung KIM, Won-Ik KIM, Hyun LEE, Chul Sik YOON, Kwang Jae LIM, Seokki KIM
  • Publication number: 20130016675
    Abstract: Disclosed is a method for a terminal to report an emergency in a mobile communication system, the method including detecting an emergency and transmitting an emergency report header to a base station to notify the base station of the emergency, the emergency report header including a field indicating a signaling header for emergency reporting.
    Type: Application
    Filed: July 13, 2012
    Publication date: January 17, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jae Sun CHA, Soojung JUNG, Seokki KIM, Chul Sik YOON, Kwang Jae LIM
  • Publication number: 20130017817
    Abstract: A method of performing communication of a terminal includes the terminal transmitting state information thereof to a base station, and the terminal receiving a mode change request from the base station when the terminal is selected by the base station.
    Type: Application
    Filed: July 11, 2012
    Publication date: January 17, 2013
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Won-Ik Kim, Eunkyung Kim, Sung Kyung Kim, Sung Cheol Chang, Jae Sun Cha, Mi Young Yun, Hyun Lee, Chul Sik Yoon, Kwang Jae Lim
  • Publication number: 20130010593
    Abstract: A system access method of a terminal in a mobile communication system according to an exemplary embodiment of the present invention includes receiving a control channel or a control message including resource allocation information, an access restriction indicator, and information about a random access region from a base station, and determining whether or not to access the base station according to a set value of the access restriction indicator.
    Type: Application
    Filed: July 9, 2012
    Publication date: January 10, 2013
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jae Sun CHA, Soojung Jung, Seokki Kim, Chul Sik Yoon, Kwang Jae Lim
  • Publication number: 20130010671
    Abstract: When zone allocation information of sub-bands is changed, a terminal receives a new MBS configuration message after a lifetime of an MBS configuration message at a time when the changed zone allocation information is received is expired. The terminal applies the changed zone allocation information at the beginning of the first MSI of the new MBS configuration message.
    Type: Application
    Filed: March 17, 2011
    Publication date: January 10, 2013
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Eunkyung Kim, Jae Sun Cha, Soojung Jung, Hyun Lee, Chul Sik Yoon
  • Patent number: 8346283
    Abstract: A method for measuring a position includes: allocating a first ranging code and a first ranging region for a mobile station; receiving a second ranging code and allocation information on a second ranging region of the mobile station from a neighboring base station; transmitting the first ranging code and the second ranging code to the mobile station; receiving the first ranging code from the mobile station in the first ranging region; calculating a received timing adjustment value of the first ranging code; receiving a received timing adjustment value of the second ranging code from the neighboring base station; and measuring the position of the mobile station according to the received timing adjustment value of the first ranging code and the received timing adjustment value of the second ranging code. Therefore, the cost and efficiency can be improved by measuring the position of the mobile station by changing the ranging method used in the conventional system.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: January 1, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jae-Sun Cha, Kwang-Jae Lim, Chul-Sik Yoon
  • Publication number: 20120329506
    Abstract: Provided is a method for obtaining superframe header (SFH) information in a neighboring base station advertisement (NBR-ADV) message at a terminal. In the method, a NBR-ADV message having SFH information set per each carrier is received from a serving base station. The SFH information of each carrier is obtained from the NBR-ADV message. In the obtaining the SFH information of each carrier, SFH information of a corresponding carrier is obtained based on SFH information of a previous carrier when a predetermined field is set as a predetermined value.
    Type: Application
    Filed: March 4, 2011
    Publication date: December 27, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sung Cheol Chang, Eunkyung Kim, Jae Sun Cha, Soojung Jung, Hyun Lee, Chul Sik Yoon
  • Publication number: 20120327856
    Abstract: A base station transmits a first message including indices of a plurality of carriers and information for the plurality of carrier to a mobile station. Also, the base station transmits a second message including a bitmap representing whether each of the plurality of carriers corresponds to a paging carrier used for transmitting a paging message, to the mobile station. The base station selects a paging transmission carrier for the mobile station from among the plurality of carriers and transmits a paging message through the selected paging transmission carrier.
    Type: Application
    Filed: March 4, 2011
    Publication date: December 27, 2012
    Inventors: Soojung Jung, Jae Sun Cha, Sung Cheol Chang, Hyun Lee, Chul Sik Yoon
  • Publication number: 20120327935
    Abstract: For managing MBS configuration information, a terminal decodes an MBS configuration message including configuration information for an MBS operation and a lifetime, and then decodes an MBS configuration message that is transmitted at a time that the lifetime indicates.
    Type: Application
    Filed: March 4, 2011
    Publication date: December 27, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Eunkyung Kim, Jae Sun Cha, Soojung Jung, Sung Cheol Chang, Hyun Lee, Chul Sik Yoon
  • Patent number: 8335278
    Abstract: Disclosed is a method for generating feedback signal patterns of common feedback channels using cyclic shift in a multiple access system, and a transceiver therefore. A method for generating feedback signal patterns includes generating first transmission symbols by adding a cyclic prefix to transmission symbols of feedback signals, and generating second and subsequent transmission symbols by cyclically shifting the first transmission symbols and then adding the cyclic prefix.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: December 18, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kwang Jae Lim, Chul Sik Yoon, Young-Ho Jung
  • Patent number: 8331398
    Abstract: The present invention relates to a method of constructing a resource allocation map in a mobile communication system. In a method of constructing a map in a hierarchial pattern method in a case where a localized resource block (localized RB) and a distributed resource block (distributed RB) need to be simultaneously allocated in regards to a radio resource allocated in a previous frame or reserved with a fixed allocation, a radio resource that is reserved or not used and a radio resource that is newly allocated in a map of a current frame are classified and represented. Then, in regards to a radio resource that is allocated in a current frame, a localized RB and a distributed RB are classified and represented. As for the localized RB, allocation information is represented in an index pattern method, and as for the distributed RB, resource allocation information is represented in a toggle pattern method.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: December 11, 2012
    Assignees: Samsung Electronics Co., Ltd., Electronics & Telecommunications Research Institute
    Inventors: Kwang-Jae Lim, Chul-Sik Yoon
  • Patent number: 8331940
    Abstract: A method and device for providing reference information for starting scanning a different radio access network to a terminal in a boundary area is provided. A receiver supporting a plurality of access systems includes a receiving circuit for receiving a scanning threshold from a transmitter, a first measuring module for measuring channel quality of a serving cell, and a second measuring module for starting scanning a neighboring cell that is a different radio access network when channel quality of the serving cell is less than the channel quality threshold. The receiver may further include a handover module for performing handover to the neighboring cell when the channel quality of the neighboring cell measured by the second measuring module is greater than that of the serving cell.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: December 11, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Won-Ik Kim, Sung-Geun Jin, Sung Cheol Chang, Chul Sik Yoon, Jee Hwan Ahn
  • Patent number: 8331321
    Abstract: A method for handover according to the present invention includes: requesting information on femto cells that are accessible by the terminal from a macro base station that manages the macro cells; receiving the femto cell information from the macro base station; and scanning neighboring femto cells based on the femto cell information.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: December 11, 2012
    Assignees: Samsung Electronics Co., Ltd., Electronics and Telecommunications Research Institute
    Inventors: Won-Ik Kim, Sung Cheol Chang, Kwang Jae Lim, Chul Sik Yoon, Jee Hwan Ahn
  • Patent number: 8326304
    Abstract: The present invention relates to a femtocell search method for a handover from a macrocell to a femtocell. The present invention relates to a method for a terminal that accesses a macrocell to search a femtocell in an environment where a plurality of femtocells are overlapped in one macrocell. The terminal searches a femtocell by using a dummy preamble in order to minimize the size of neighbor cell lists broadcasted from the macrocell to the terminal. Therefore, according to the present invention, an MAC overhead can be minimized by eliminating neighbor femtocell lists in a mobile neighbor advertisement (MOB_NBR_ADV) message broadcasted from the macrocell, and the terminal can search a femtocell with a minimum scanning load by checking only a femtocell dummy preamble in a dedicated symbol of the macrocell.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: December 4, 2012
    Assignees: Samsung Electronics Co., Ltd., Electronics & Telecommunications Research Institute
    Inventors: Won-Ik Kim, Kwang Jae Lim, Sung Cheol Chang, Sung-Geun Jin, Hyun Lee, Chul Sik Yoon
  • Publication number: 20120294245
    Abstract: Disclosed is a method for a first terminal to perform direct communication between terminals, the method including performing direct communication with at least one second terminal by using resources allocated for direct communication between terminals, the resources including a synchronization channel used for frequency synchronization and time synchronization between terminals, and the synchronization channel including a synchronization channel preamble used for at least one of preamble detection, time offset estimation, frequency offset estimation, and channel estimation.
    Type: Application
    Filed: May 18, 2012
    Publication date: November 22, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sung Cheol CHANG, Eunkyung Kim, Hyun Lee, Sung Kyung Kim, Won-Ik Kim, Chul Sik Yoon, Kwang Jae Lim, Young-Ho Jung, Mi-young Yun, Jihoon Choi, Seokki Kim
  • Publication number: 20120287839
    Abstract: When MBS information is updated, a base station transmits a first message to a terminal. The first message includes a service flow update indicator for indicating a scheme for describing a current MBS identifier (ID) and flow ID to be updated, information on the current MBS ID and flow ID described by the scheme indicated by the service flow update indicator, and new MBS information. The terminal transmits a second message to the base station in response to the first message.
    Type: Application
    Filed: January 11, 2011
    Publication date: November 15, 2012
    Applicant: Electronics And Telecommunications Research Institute
    Inventors: Eunkyung Kim, Jae Sun Cha, Soojung Jung, Sung Cheol Chang, Kwang Jae Lim, Hyun Lee, Chul Sik Yoon
  • Publication number: 20120281615
    Abstract: A method for communication of a base station includes: receiving first data from a first terminal; transmitting the first data to a second terminal by local forwarding without passing through an access service network (ASN); receiving second data from the second terminal; and transmitting the second data to the first terminal without passing through the ASN.
    Type: Application
    Filed: May 2, 2012
    Publication date: November 8, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Eunkyung KIM, Sung Kyung Kim, Sung Cheol Chang, Hyun Lee, Chul Sik Yoon, Kwang Jae Lim