Patents by Inventor Ho-Kyom Kim
Ho-Kyom Kim 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).
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Publication number: 20200178352Abstract: Provided are a system and method for multi-mode integrated management for a multi-radio communication environment. The system includes a receiver configured to receive radio channel state information, a memory in which a program for operating an access point division in consideration of the radio channel state information is stored, and a processor configured to execute the program, wherein the processor manages an interface between a cellular base station and a radio access control device.Type: ApplicationFiled: December 2, 2019Publication date: June 4, 2020Applicant: Electronics and Telecommunications Research InstituteInventors: Han Byeog CHO, Hyun Seo OH, Ho Kyom KIM, Nak Seon SEONG, Byung Tae JANG
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Patent number: 9167279Abstract: Disclosed are payload formatting and deformatting methods for burst data loss recovery. The payload formatting method according to an embodiment of the present invention includes: generating an XOR operation packet by performing an XOR operation on the basis of a base layer packet and any one of enhancement layer packets of a group of pictures (GoP), the GoP including the base layer packet and the enhancement layer packets; and adding the XOR operation packet to the GoP.Type: GrantFiled: August 14, 2012Date of Patent: October 20, 2015Assignee: ELECTRONICS & TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Seok Ho Won, Sun Hyoung Kwon, Ho Kyom Kim, Jong Soo Lim, O Hyung Kwon
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Publication number: 20150172015Abstract: Provided are a coordinated multipoint transmission and reception method and a coordinated multipoint transmission and reception system for performing the same. In the operation method of a first base station in a network in which the first base station and a second base station transmit data to a terminal, the method includes receiving, by the first base station, a packet to be transmitted to the terminal and base station information indicating a base station determined to transmit the packet from a gateway of the network; and transmitting, by the first base station, the packet to the terminal according to the determined base station information.Type: ApplicationFiled: February 26, 2015Publication date: June 18, 2015Inventors: Seuck Ho WON, Sun Hyoung KWON, Ho Kyom KIM, Jong Soo LIM, Jin Woo HONG
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Publication number: 20150015666Abstract: In order to provide a three-dimensional (3D) video streaming service to a user terminal, user characteristic information including eyesight information of the left eye and the right eye of a user is received from the user terminal. Then, one of quality of a left image and that of a right image is improved in accordance with the eyesight information so that an image with improved quality is transmitted to the user terminal.Type: ApplicationFiled: November 13, 2013Publication date: January 15, 2015Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Sun Hyoung KWON, Ho Kyom KIM, Seok Ho WON, Jong Soo LIM, O Hyung KWON
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Publication number: 20150006991Abstract: Disclosed are a graceful degradation-forward error correction method and an apparatus for performing same. A graceful degradation-forward error correction method determines an encoding unit data group constituted by a predetermined number of time intervals for a data stream input in a time-sequential manner, determines a reference data group to be used in generating a parity frame in each time interval of the encoding unit data group, generates a parity frame using the determined at least one reference data group, and assigns the generated parity frame to at least one time interval from among a plurality of time intervals including time intervals constituting the encoding unit data group based on a predetermined rule. Thus, a lost packet can be recovered even when the packet of a continuous long interval is lost, and consequentially, a seamless service may be provided.Type: ApplicationFiled: January 24, 2013Publication date: January 1, 2015Inventors: Seok Ho Won, Sun Hyoung Kwon, Ho Kyom Kim, Jong Soo Lim, O Hyung Kwon
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Publication number: 20140204785Abstract: A communication apparatus and method using a massive multiple input multiple output (MIMO) is disclosed, the method including measuring a transmission capacity between terminals disposed in a cell and a base station when a number of terminals disposed in the cell of the base station is greater than a number of terminals to be supported by the base station, and selecting at least one terminal for maximizing a network capacity from among terminals disposed in the cell based on the transmission capacity and the number of terminals to be supported by the base station.Type: ApplicationFiled: January 22, 2014Publication date: July 24, 2014Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Kwi Hoon KIM, Ho Kyom KIM, Il Min KIM, Woong Shik YOU, O Hyung KWON
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Publication number: 20130128113Abstract: Provided is a data transmission system using a vertical layer optimisation technique. A data transmission device predicts the buffer state of a data receiving device by using feedback information of a physical layer, and controls data transmission by referring to the predicted buffer state. The data transmission device can control the transmission of first data and second data such that the buffer state of the receiving device is within a preset range.Type: ApplicationFiled: July 28, 2011Publication date: May 23, 2013Applicant: Electronics and Telecommunications Research InstituteInventors: Seok Ho Won, Ho Kyom Kim, Sun Hyoung Kwon, Jong Soo Lim, Jin Woo Hong
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Publication number: 20130051479Abstract: Disclosed are payload formatting and deformatting methods for burst data loss recovery. The payload formatting method according to an embodiment of the present invention includes: generating an XOR operation packet by performing an XOR operation on the basis of a base layer packet and any one of enhancement layer packets of a group of pictures (GoP), the GoP including the base layer packet and the enhancement layer packets; and adding the XOR operation packet to the GoP.Type: ApplicationFiled: August 14, 2012Publication date: February 28, 2013Applicant: Electronics and Telecommunications Research InstituteInventors: Seok Ho WON, Sun Hyoung Kwon, Ho Kyom Kim, Jong Soo Lim, O Hyung Kwon
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Publication number: 20130042278Abstract: A method and an apparatus for providing video service according to example embodiments of the present invention are disclosed. The method for providing video service according to one example embodiment of the present invention comprises determining based on a predetermined reference whether it is necessary to set multiple bearers to provide the video service for a terminal, and when it is determined necessary to set the multiple bearers, setting an additional bearer, dividing a video source stream into a first stream and a second stream, assigning the first and second streams to a default bearer and the additional bearer, respectively, and transmitting the first and second streams to the terminal.Type: ApplicationFiled: August 8, 2012Publication date: February 14, 2013Applicant: Electronics and Telecommunications Research InstituteInventors: Seok Ho WON, Sun Hyoung KWON, Ho Kyom KIM, Jong Soo LIM, O Hyung KWON
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Publication number: 20120188953Abstract: Provided are a coordinated multipoint transmission and reception method and a coordinated multipoint transmission and reception system for performing the same. In the coordinated multipoint transmission and reception method, a first point and a second point participating in the coordinated multipoint transmission exchange resource allocation information for coordinated multipoint transmission, allocate resources for coordinated multipoint transmission not to overlap each other based on the exchanged resource allocation information, and perform the coordinated multipoint transmission using the allocated resources. Accordingly, use efficiency of radio resources can be improved and embodying complexity can be reduced.Type: ApplicationFiled: January 17, 2012Publication date: July 26, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: Seuck Ho WON, Sun Hyoung Kwon, Ho Kyom Kim, Jong Soo Lim, Jin Woo Hong
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Publication number: 20120163357Abstract: Provided is a method of retransmitting and receiving a packet in heterogeneous network environment. A terminal and a relay base station receive a packet transmitted from a macro base station, and the relay base station informs the terminal of whether the packet is successively received or not. When the packet fails to be received, the terminal is configured to receive the erroneous packet again from at least one of the macro base station and the relay base station. The macro base station and the relay base station may be configured to retransmit the packet through joint processing JP) transmission, and the terminal may be configured to receive the JP transmission. Thus, the method allows the m optimization of a HARQ process and scheduling scheme to efficiently utilize a relay and radio resources, thereby leading to a maximum capacity and quality of wireless network.Type: ApplicationFiled: December 14, 2011Publication date: June 28, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: Seok Ho WON, Sun Hyoung Kwon, Ho Kyom Kim, Jong Soo Lim, Jin Woo Hong
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Publication number: 20120144433Abstract: Provided are an apparatus and method for transmitting multimedia data in a wireless network. The apparatus and method receive multimedia data classified into at least one layer, and set different radio bearer channels for the respective at least one multimedia layer. Here, a service quality parameter is differentially applied to the respective set radio bearer channels, so that end-to-end quality of service (QoS) improvement is maximized.Type: ApplicationFiled: December 2, 2011Publication date: June 7, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: Seok Ho WON, Sun Hyoung KWON, Ho Kyom KIM, Jong Soo LIM, Jin Woo HONG
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Patent number: 7791431Abstract: Provided are a 3-port orthogonal mode transducer, and a receiver and receiving method using the same. The 3-port orthogonal mode transducer includes: a transmission port having a rectangular shape elongated in a horizontal direction and configured to transmit a Ka-band (30 GHz) vertical polarization signal; a first reception port having a rectangular shape inclined at about +45 degrees at a location being at about +45 degrees with respect to the transmission port and configured to receive a K-band (20 GHz) vertical or horizontal polarization signal phased-delayed about +45 degrees; and a second reception port having a rectangular shape inclined at about ?45 degrees at a location being at about ?45 degrees with respect to the transmission port and configured to receive a K-band (20 GHz) vertical or horizontal polarization signal phase-delayed about ?45 degrees.Type: GrantFiled: November 30, 2007Date of Patent: September 7, 2010Assignee: Electronics and Telecommunications Research InstituteInventors: Sung Min Han, Ho Kyom Kim, Joon Gyu Ryu, Young Wan Kim, Ki Seop Han
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Patent number: 7697639Abstract: Provided are an apparatus and method for robust Binary Phase Shift Keying/Quadrature Phase Shift Keying (BPSK/QPSK) blind modulation classification. The apparatus includes first and second likelihood value calculators for calculating a likelihood value of a received baseband signal each for of BPSK and QPSK modulation modes. A maximum setting unit derives a maximum value of the likelihood values or ith likelihood ratios calculated by the first and second likelihood value calculators. A flag is set for the maximum value to “1” and a flag for the remaining value is set to “0”. First and second flag combining units combine the flags for the modulation modes. A modulation mode flag setting unit selects a maximum value from the flags combined by the first and second flag combining units.Type: GrantFiled: May 25, 2006Date of Patent: April 13, 2010Assignee: Electronics and Telecommunications Research InstituteInventors: Il-Han Kim, Joon-Gyu Ryu, Ho-Kyom Kim, Deock-Gil Oh
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Publication number: 20080129423Abstract: Provided are a 3-port orthogonal mode transducer, and a receiver and receiving method using the same. The 3-port orthogonal mode transducer includes: a transmission port having a rectangular shape elongated in a horizontal direction and configured to transmit a Ka-band (30 GHz) vertical polarization signal; a first reception port having a rectangular shape inclined at about +45 degrees at a location being at about +45 degrees with respect to the transmission port and configured to receive a K-band (20 GHz) vertical or horizontal polarization signal phased-delayed about +45 degrees; and a second reception port having a rectangular shape inclined at about ?45 degrees at a location being at about ?45 degrees with respect to the transmission port and configured to receive a K-band (20 GHz) vertical or horizontal polarization signal phase-delayed about ?45 degrees.Type: ApplicationFiled: November 30, 2007Publication date: June 5, 2008Applicant: Electronics and Telecommunications Research InstituteInventors: Sung Min HAN, Ho Kyom KIM, Joon Gyu RYU, Young Wan KIM, Ki Seop Han
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Patent number: 7286824Abstract: A method for controlling data transmission rate in order to save waste of resources due to Non-Line Of Sight (NLOS) region when a mobile terminal passes through the NLOS region in an interactive satellite communication system is disclosed. The method includes the steps of setting at least one threshold; at a Network Control Center (NCC) adjusting allocated resources based on the Constant Resources Allocation (CRA) after detecting whether Satellite Access Control is lost or not; compensating transmission delay by reallocating if the mobile terminal returns from the NLOS region within a first threshold duration, wherein the mobile terminal maintains the fine sync state during the first threshold duration; and deallocating all resources allocated based on the CRA if the mobile terminal does not return from the NLOS region within the first threshold duration.Type: GrantFiled: August 11, 2004Date of Patent: October 23, 2007Assignee: Electronics and Telecommunications Research InstituteInventors: Ki-Dong Lee, Ho-Jin Lee, Ho-Kyom Kim, Deock-Gil Oh
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Publication number: 20070092041Abstract: Provided are an apparatus and method for robust Binary Phase Shift Keying/Quadrature Phase Shift Keying (BPSK/QPSK) blind modulation classification against errors in a satellite communication system. The apparatus includes first and second likelihood value calculators for calculating a likelihood value of a received baseband signal each for of BPSK and QPSK modulation modes, respectively, a maximum setting unit for deriving a maximum value of the likelihood values or ith likelihood ratios calculated by the first and second likelihood value calculators and setting a flag for the maximum value to “1” and a flag for the remaining value to “0”, first and second flag combining units for combining the flags for the modulation modes, respectively, a modulation mode flag setting unit for selecting a maximum value from the flags combined by the first and second flag combining units, and a modulation classification mode deciding unit.Type: ApplicationFiled: May 25, 2006Publication date: April 26, 2007Inventors: Il-Han Kim, Joon-Gyu Ryu, Ho-Kyom Kim, Deock-Gil Oh
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Publication number: 20060115013Abstract: A blind modulation classification apparatus in a satellite communication system improves performance in non-ideal communication environment having frequency error and phase error, by reducing computational burden of test statistic and possibility of numerical error of hardware, with computation of likelihood for each stage independently. The blind modulation classification apparatus includes a plurality of likelihood computing units, each for computing a likelihood value of a received baseband signal for corresponding one of a plurality of modulation schemes; a maximum selecting and setting units for selecting the maximum among the calculated likelihood values and setting a flag corresponding to the maximum to ‘1’ and the other flags to ‘0’; a plurality of flag summing-up units for summing up the flags of the plurality of the modulation schemes; and a modulation scheme selecting unit for selecting the maximum among the summed-up values and selecting the modulation scheme corresponding to the selected value.Type: ApplicationFiled: July 19, 2005Publication date: June 1, 2006Inventors: Il Kim, Ho-Kyom Kim, Deock-Gil Oh, Ho-Jin Lee
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Publication number: 20050143003Abstract: A method for controlling data transmission rate in order to save waste of resources due to Non-Line Of Sight (NLOS) region when a mobile terminal passes through the NLOS region in an interactive satellite communication system is disclosed. The method includes the steps of setting at least one threshold; at a Network Control Center (NCC) adjusting allocated resources based on the Constant Resources Allocation (CRA) after detecting whether Satellite Access Control is lost or not; compensating transmission delay by reallocating if the mobile terminal returns from the NLOS region within a first threshold duration, wherein the mobile terminal maintains the fine sync state during the first threshold duration; and deallocating all resources allocated based on the CRA if the mobile terminal does not return from the NLOS region within the first threshold duration.Type: ApplicationFiled: August 11, 2004Publication date: June 30, 2005Inventors: Ki-Dong Lee, Ho-Jin Lee, Ho-Kyom Kim, Deock-Gil Oh