Patents by Inventor Woo-Geun Ahn
Woo-Geun Ahn 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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Patent number: 9425884Abstract: Provided are examples of methods of a vehicular moving relay in a communication system including the vehicular moving relay, a moving terminal, and a macro base station. Also provided is an example of a terminal. The vehicular moving relay may repeatedly transmit data to a vehicular moving terminal without requesting a handover from a macro base station to the vehicular moving relay, using a unique code that is allocated to the vehicular moving terminal from the macro base station.Type: GrantFiled: June 10, 2011Date of Patent: August 23, 2016Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Jong Bu Lim, Tae Soo Kwon, Woo Geun Ahn, Byoung Hoon Jung, Han Sung Leem, Dan Keun Sung, Dong Ho Cho
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Patent number: 8874115Abstract: Provided are a method and system for handing over a mobile terminal between a macro base station and a vehicular base station to secure a communication service of a movable mobile terminal in a wireless communication system supporting a vehicular base station such as a vehicular relay station. The mobile terminal may be handed over by selecting a network or a vehicular base station suitable to a mobility and type of communication.Type: GrantFiled: November 16, 2011Date of Patent: October 28, 2014Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Jong Bu Lim, Tae Soo Kwon, Woo Geun Ahn, Byoung Hoon Jung, Dan Keun Sung, Dong Ho Cho, Ji Young Cha, Han Sung Leem
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Patent number: 8792452Abstract: A communication method of a serving micro base station is provided. The method includes a handover of a vehicular mobile terminal based on uplink broadcast information including a unique access code allocated to the vehicular mobile terminal within a multi-cell group. The multi-cell group includes a macro base station and a plurality of micro base stations within a cell coverage of the macro base station. The handover is performed based on a determined preparation level of the handover that is based on the uplink broadcast information.Type: GrantFiled: January 6, 2011Date of Patent: July 29, 2014Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Tae Soo Kwon, Woo Geun Ahn, Dong Ho Cho, Min Suk Kang
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Patent number: 8755809Abstract: Provided is a communication method of a base station and a target terminal. Resources used for a channel feedback may be reduced by determining a wireless resource based on information about a channel and information about a mobility of the target terminal in each of at least one route, and by feeding back channel state information.Type: GrantFiled: June 27, 2011Date of Patent: June 17, 2014Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Tae Soo Kwon, Woo Geun Ahn, Dong Ho Cho, Ju Yong Lee, Jong Bu Lim, Hyun Gi Ahn
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Patent number: 8218482Abstract: An apparatus and method for call setup in a wireless communication system are provided. A first Mobile Station (MS) determines a DownLink (DL) duration, performs synchronization, selects one preamble code among a preamble code set reserved for the call setup of the MS out of the cell area, and transmits the selected preamble code during the determined DL duration. A second MS scans a preamble code during the DL duration, determines if the scanned preamble code is a preamble code for the call setup of the MS out of the cell area, and transmits a response message to the preamble code to the first MS.Type: GrantFiled: February 17, 2009Date of Patent: July 10, 2012Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Sang-Min Lee, Yung-Soo Kim, ll-Won Kwon, Hyung-Myung Kim, Woo-Geun Ahn, Dae-Hyun Kim
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Publication number: 20120129532Abstract: Provided are a method and system for handing over a mobile terminal between a macro base station and a vehicular base station to secure a communication service of a movable mobile terminal in a wireless communication system supporting a vehicular base station such as a vehicular relay station. The mobile terminal may be handed over by selecting a network or a vehicular base station suitable to a mobility and type of communication.Type: ApplicationFiled: November 16, 2011Publication date: May 24, 2012Applicants: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, SAMSUNG ELECTRONICS CO., LTD.Inventors: Jong Bu Lim, Tae Soo Kwon, Woo Geun Ahn, Byoung Hoon Jung, Dan Keun Sung, Dong Ho Cho, Ji Young Cha, Han Sung Leem
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Publication number: 20120113838Abstract: Provided are examples of methods of a vehicular moving relay in a communication system including the vehicular moving relay, a moving terminal, and a macro base station. Also provided is an example of a terminal. The vehicular moving relay may repeatedly transmit data to a vehicular moving terminal without requesting a handover from a macro base station to the vehicular moving relay, using a unique code that is allocated to the vehicular moving terminal from the macro base station.Type: ApplicationFiled: June 10, 2011Publication date: May 10, 2012Inventors: Jong Bu Lim, Tae Soo Kwon, Woo Geun Ahn, Byoung Hoon Jung, Han Sung Leem, Dan Keun Sung, Dong Ho Cho
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Publication number: 20120108257Abstract: Provided is a communication method of a base station and a target terminal. Resources used for a channel feedback may be reduced by determining a wireless resource based on information about a channel and information about a mobility of the target terminal in each of at least one route, and by feeding back channel state information.Type: ApplicationFiled: June 27, 2011Publication date: May 3, 2012Applicants: Korea Advanced Institute of Science and Technology, SAMSUNG ELECTRONICS CO., LTD.Inventors: Tae Soo KWON, Woo Geun Ahn, Dong Ho Cho, Ju Yong Lee, Jong Bu Lim, Hyun Gi Ahn
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Patent number: 8068471Abstract: A method and apparatus for scheduling multiuser terminals in a communication system is provided. A receiver receives feedback information from a plurality of user terminals. A user grouping unit selects terminals having a maximum Signal to Interference plus Noise Ratio (SINR) among terminals having the same beam index and beam subset index, from among the plurality of user terminals, and generates terminal groups using the selected terminals, each terminal group including terminals having the same beam subset index. A group scheduling unit calculates a throughput of each of the terminal groups to determine which terminal group has the maximum throughput. A random precoding unit generates random beam vectors corresponding to terminals included in the terminal group determined to have the maximum throughput, and transmits data for user terminals, included in the terminal group determined to have the maximum throughput, over the generated random beam vectors.Type: GrantFiled: March 6, 2008Date of Patent: November 29, 2011Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Yu-Seok Kim, In-Soo Hwang, Young-Ho Jung, Myeon-Kyun Cho, Hyung-Myung Kim, Tae-Sung Kang, Woo-Geun Ahn, Dae-Hyun Kim
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Publication number: 20110261785Abstract: A communication method of a serving micro base station is provided. The method includes a handover of a vehicular mobile terminal based on uplink broadcast information including a unique access code allocated to the vehicular mobile terminal within a multi-cell group. The multi-cell group includes a macro base station and a plurality of micro base stations within a cell coverage of the macro base station. The handover is performed based on a determined preparation level of the handover that is based on the uplink broadcast information.Type: ApplicationFiled: January 6, 2011Publication date: October 27, 2011Inventors: Tae Soo Kwon, Woo Geun Ahn, Dong Ho Cho, Min Suk Kang
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Patent number: 8014784Abstract: A method and system for allocating a channel are provided in a communication system including a plurality of Mobile Stations (MSs) and Base Stations (BSs) for providing a communication service to the plurality of MSs. A BS transmits an average Channel Quality Information (CQI) request to MSs. The MSs measure CQI with respect to their channels in response to the request from the BS, compute average CQI from the measured CQI, and transmit the average CQI to the BS. The BS selects a predefined number of MSs according to the average CQI received from the MSs and sets an MS group. The BS transmits a CQI request to the MS group. The MSs of the MS group transmit the CQI to the BS. The BS receives the CQI from the MS group and allocates a channel according to the CQI.Type: GrantFiled: February 15, 2007Date of Patent: September 6, 2011Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology (KAIST)Inventors: Myeon-Gyun Cho, Yung-Soo Kim, Hyung-Myung Kim, Tae-Sung Kang, Dae-Hyun Kim, Woo-Geun Ahn
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Patent number: 7860056Abstract: A method for allocating a sub-channel in a wireless communication system is disclosed. The method includes measuring a moving velocity of each of mobile stations (MSs); selecting MSs to which a sub-channel is to be allocated; determining a resource allocation period for sub-channel allocation to the MSs using the measured moving velocity; calculating an average amount of data to be transmitted for the determined resource allocation period, and sending a channel quality information (CQI) request to the MSs; upon receipt of CQI in response to the CQI request, allocating a sub-channel satisfying the average data amount taking the CQI into account; and transmitting a control signal for the sub-channel allocation to the MSs.Type: GrantFiled: February 16, 2007Date of Patent: December 28, 2010Assignees: Samsung Electronics Co., Ltd, Korea Advanced Institute of Science & Technology (KAIST)Inventors: Jong-Hyung Kwun, Myeon-Gyun Cho, Dae-Young Park, Hyung-Myung Kim, Woo-Geun Ahn, Dae-Hyun Kim, Tae-Sung Kang, Se-Ho Kim
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Publication number: 20090209260Abstract: An apparatus and method for call setup in a wireless communication system are provided. A first Mobile Station (MS) determines a DownLink (DL) duration, performs synchronization, selects one preamble code among a preamble code set reserved for the call setup of the MS out of the cell area, and transmits the selected preamble code during the determined DL duration. A second MS scans a preamble code during the DL duration, determines if the scanned preamble code is a preamble code for the call setup of the MS out of the cell area, and transmits a response message to the preamble code to the first MS.Type: ApplicationFiled: February 17, 2009Publication date: August 20, 2009Applicants: SAMSUNG ELECTRONICS CO. LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Sang-Min LEE, Yung-Soo KIM, Il-Won KWON, Hyung-Myung KIM, Woo-Geun AHN, Dae-Hyun KIM
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Publication number: 20080219194Abstract: A method and apparatus for scheduling multiuser terminals in a communication system is provided. A receiver receives feedback information from a plurality of user terminals. A user grouping unit selects terminals having a maximum Signal to Interference plus Noise Ratio (SINR) among terminals having the same beam index and beam subset index, from among the plurality of user terminals, and generates terminal groups using the selected terminals, each terminal group including terminals having the same beam subset index. A group scheduling unit calculates a throughput of each of the terminal groups to determine which terminal group has the maximum throughput. A random precoding unit generates random beam vectors corresponding to terminals included in the terminal group determined to have the maximum throughput, and transmits data for user terminals, included in the terminal group determined to have the maximum throughput, over the generated random beam vectors.Type: ApplicationFiled: March 6, 2008Publication date: September 11, 2008Applicants: SAMSUNG ELECTRONICS CO. LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Yu-Seok KIM, In-Soo HWANG, Young-Ho JUNG, Myeon-Kyun CHO, Hyung-Myung KIM, Tae-Sung KANG, Woo-Geun AHN, Dae-Hyun KIM
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Publication number: 20070230327Abstract: A transmitting apparatus and method in an OFDM system are provided. In the transmitting apparatus, a channel information receiver receives channel information. A rate allocator calculates a variable data rate. A scheduler allocates channel resources according to the channel information and the variable data rate.Type: ApplicationFiled: February 6, 2007Publication date: October 4, 2007Applicants: SAMSUNG ELECTRONICS CO., LTD., Korea Advanced Institute of Science and TechnologyInventors: Myeon-Kyun Cho, Jong-Hyeuk Lee, Seung-Hoon Nam, Hyung-Myung Kim, Tae-Sung Kang, Woo-Geun Ahn, Dae-Hyun Kim
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Publication number: 20070206534Abstract: A method for allocating a sub-channel in a wireless communication system is disclosed. The method includes measuring a moving velocity of each of mobile stations (MSs); selecting MSs to which a sub-channel is to be allocated; determining a resource allocation period for sub-channel allocation to the MSs using the measured moving velocity; calculating an average amount of data to be transmitted for the determined resource allocation period, and sending a channel quality information (CQI) request to the MSs; upon receipt of CQI in response to the CQI request, allocating a sub-channel satisfying the average data amount taking the CQI into account; and transmitting a control signal for the sub-channel allocation to the MSs.Type: ApplicationFiled: February 16, 2007Publication date: September 6, 2007Applicants: SAMSUNG ELECTRONICS CO., LTD., Korea Advanced Institute of Science and Technology (KAIST)Inventors: Jong-Hyung Kwun, Myeon-Gyun Cho, Dae-Young Park, Hyung-Myung Kim, Woo-Geun Ahn, Dae-Hyun Kim, Tae-Sung Kang, Se-Ho Kim
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Publication number: 20070207810Abstract: A method and system for allocating a channel are provided in a communication system including a plurality of Mobile Stations (MSs) and Base Stations (BSs) for providing a communication service to the plurality of MSs. A BS transmits an average Channel Quality Information (CQI) request to MSs. The MSs measure CQI with respect to their channels in response to the request from the BS, compute average CQI from the measured CQI, and transmit the average CQI to the BS. The BS selects a predefined number of MSs according to the average CQI received from the MSs and sets an MS group. The BS transmits a CQI request to the MS group. The MSs of the MS group transmit the CQI to the BS. The BS receives the CQI from the MS group and allocates a channel according to the CQI.Type: ApplicationFiled: February 15, 2007Publication date: September 6, 2007Applicants: SAMSUNG ELECTRONICS CO., LTD., Korea Advanced Institute of Science and Technology (KAIST)Inventors: Myeon-Gyun Cho, Yung-Soo Kim, Hyung-Myung Kim, Tae-Sung Kang, Dae-Hyun Kim, Woo-Geun Ahn
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Publication number: 20060094372Abstract: Disclosed is a method for uplink scheduling in a communication system. The method for uplink scheduling in a communication system having a cellular structure hopping between sub-channels according to a predetermined rule whenever a signal is transmitted The communication system dividing a whole frequency band into a plurality of sub-carrier bands and including the sub-channels which are sets of the sub-carrier bands.Type: ApplicationFiled: October 28, 2005Publication date: May 4, 2006Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)Inventors: Woo-Geun Ahn, Seung-Young Park, Yeon-Woo Lee, Ok-Seon Lee, Hyung-Myung Kim, Hye-Ju Oh, Yung-Soo Kim, Tae-Sung Kang
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Publication number: 20060094363Abstract: An orthogonal frequency division multiple access (OFDMA) communication system. The system has a plurality of cells, divides an entire frequency band into a plurality of subcarrier bands in each cell, and has subchannels that are a set of a preset number of subcarrier bands, respectively. Interference from neighbor cells of the plurality of cells is predicted. A time interval in which interference is absent and a time interval in which the interference is present are classified according to the interference predicted from the neighbor cells. Transmit power is equally distributed and allocated to subchannels capable of being allocated in the time interval in which the interference is absent. Transmit power is adjusted and allocated for the subchannels capable of being allocated such that inference to the neighbor cells does not occur in the time interval in which the interference is present.Type: ApplicationFiled: October 28, 2005Publication date: May 4, 2006Applicants: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)Inventors: Tae-Sung Kang, Yeon-Woo Lee, Seung-young Park, Ok-Seon Lee, Hyung-Myung Kim, Hye-Ju Oh, Yun-Jik Jang, Woo-Geun Ahn