Patents by Inventor Dan-Keun Sung
Dan-Keun Sung 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: 10624110Abstract: Provided is a method for selectively performing an uplink scheduling request (SR) by a terminal on the basis of an adaptive uplink channel state threshold value, and an apparatus supporting the same. The terminal may calculate an uplink channel state threshold value on the basis of a variation of a short-term average uplink channel state and a long-term average uplink channel state, determine an uplink channel state predictive value on the basis of a downlink channel state, and determine whether to perform an uplink scheduling request on the basis of the uplink channel state predictive value and the uplink channel state threshold value.Type: GrantFiled: July 14, 2016Date of Patent: April 14, 2020Assignees: LG Electronics Inc., Korea Advanced Institute of Science and TechnologyInventors: Inkyu Bang, JaYeong Kim, Dan Keun Sung, Yunjung Yi, Kijun Kim
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Patent number: 10512107Abstract: Provided is a terminal, for example, user equipment (UE), including a processor and that performs a random access (RA) procedure with a base station, for example, for example, eNodeB, E-UTRAN Node B, or also known as Evolved Node B, and is at least temporarily embodied by the processor. The terminal may be at least temporarily embodied by the processor. The terminal may include a generator configured to generate a preamble sequence using a first sequence corresponding to a first root index based on a preamble index that is randomly selected, and a determiner configured to determine a second root index using the preamble index as an input value of a root index function. Further, the generator may be configured to generate a tag sequence using a second sequence corresponding to the second root index based on a tag index that is randomly selected.Type: GrantFiled: December 12, 2016Date of Patent: December 17, 2019Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Dan Keun Sung, Hong Shik Park, Han Seung Jang
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Patent number: 10237827Abstract: Provided are a method by which a terminal selectively performs an operation on the basis of a terminal operation mode in a wireless communication system, and a device for supporting the method. The terminal determines a terminal group to which the terminal belongs, on the basis of a battery residual quantity and a battery residual quantity threshold value, calculates channel quality on the basis of a downlink reference signal, determines a terminal operation mode on the basis of the determined terminal group, the calculated channel quality, and the channel quality threshold value, and performs an operation on the basis of the determined terminal operation mode, wherein the terminal group can be any one of an energy insufficient group (EIG) and an energy sufficient group (ESG).Type: GrantFiled: July 4, 2016Date of Patent: March 19, 2019Assignees: LG ELECTRONICS INC., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Inkyu Bang, JaYeong Kim, Dan Keun Sung, Yunjung Yi, Kijun Kim
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Patent number: 10231196Abstract: User equipment (UE) that includes a processor and that executes a random access procedure with a base station (E-UTRAN Node B (eNodeB), also known as Evolved Node B) is provided. The UE can at least temporarily be embodied by the processor. The UE may comprise: a determination unit for determining a message size that can be transmitted and that corresponds to a physical random access channel according to an assigned communication method with the base station; a calculation unit for configuring a message to correspond to the message size and for respectively calculating a preamble index and at least one message index from the message; and an encoder for providing respective encoding of the preamble index and the at least one message index, and transmitting the same to the base station.Type: GrantFiled: February 23, 2016Date of Patent: March 12, 2019Assignee: Korea Advanced Institute of Science and TechnologyInventors: Dan Keun Sung, Han Seung Jang, Su Min Kim
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Publication number: 20180317261Abstract: Provided is a terminal, for example, user equipment (UE), including a processor and that performs a random access (RA) procedure with a base station, for example, for example, eNodeB, E-UTRAN Node B, or also known as Evolved Node B, and is at least temporarily embodied by the processor. The terminal may be at least temporarily embodied by the processor. The terminal may include a generator configured to generate a preamble sequence using a first sequence corresponding to a first root index based on a preamble index that is randomly selected, and a determiner configured to determine a second root index using the preamble index as an input value of a root index function. Further, the generator may be configured to generate a tag sequence using a second sequence corresponding to the second root index based on a tag index that is randomly selected.Type: ApplicationFiled: December 12, 2016Publication date: November 1, 2018Inventors: Dan Keun SUNG, Hong Shik PARK, Han Seung JANG
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Patent number: 10111151Abstract: The present specification suggests a method for establishing a terminal-centric group cell on the basis of measurement signal variation for cooperative transmission and handover in a mobile communication system. Specifically, a base station receives transmissions of parameters from a terminal, configures a terminal surrounding cell information table, and configures a cooperative cell cluster configuration table using the terminal surrounding cell information table as the terminal moves. The base station performs cooperative transmission and handover using the cooperative cell cluster configuration table. The terminal sends parameters to the base station periodically or when a certain condition is met, and the base station updates the terminal surrounding cell information table and the cooperative cell cluster configuration table using the parameters sent from the terminal to thereby use the same for mobility management.Type: GrantFiled: June 8, 2015Date of Patent: October 23, 2018Assignees: LG ELECTRONICS INC., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Yunjung Yi, Hansung Leem, Dan Keun Sung, JaYeong Kim, Byounghoon Kim
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Publication number: 20180206256Abstract: Provided is a method for selectively performing an uplink scheduling request (SR) by a terminal on the basis of an adaptive uplink channel state threshold value, and an apparatus supporting the same. The terminal may calculate an uplink channel state threshold value on the basis of a variation of a short-term average uplink channel state and a long-term average uplink channel state, determine an uplink channel state predictive value on the basis of a downlink channel state, and determine whether to perform an uplink scheduling request on the basis of the uplink channel state predictive value and the uplink channel state threshold value.Type: ApplicationFiled: July 14, 2016Publication date: July 19, 2018Inventors: Inkyu Bang, JaYeong Kim, Dan Keun Sung, Yunjung Yi, Kijun Kim
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Publication number: 20180199290Abstract: Provided are a method by which a terminal selectively performs an operation on the basis of a terminal operation mode in a wireless communication system, and a device for supporting the method. The terminal determines a terminal group to which the terminal belongs, on the basis of a battery residual quantity and a battery residual quantity threshold value, calculates channel quality on the basis of a downlink reference signal, determines a terminal operation mode on the basis of the determined terminal group, the calculated channel quality, and the channel quality threshold value, and performs an operation on the basis of the determined terminal operation mode, wherein the terminal group can be any one of an energy insufficient group (EIG) and an energy sufficient group (ESG).Type: ApplicationFiled: July 4, 2016Publication date: July 12, 2018Applicants: LG ELECTRONICS INC., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Inkyu BANG, JaYeong KIM, Dan Keun SUNG, Yunjung YI, Kijun KIM
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Patent number: 9888454Abstract: The present specification suggests a method and an apparatus for more efficient mobility management through a hierarchical structure of a micro mobility management entity (MME) and a macro MME in a mobile communication system. Particularly, a second MME establishes a connection with a plurality of small cells included in a single macro cell. The second MME manages a single particular macro cell, and a first MME manages a plurality of macro cells, thereby providing a hierarchical structure. Additionally, the second MME transmits a paging message to a small cell in which a terminal is positioned, among the plurality of small cells included in a single macro cell. The second MME has information on the position of the terminal and can transmit the paging message to a particular small cell in which the terminal is positioned.Type: GrantFiled: March 27, 2015Date of Patent: February 6, 2018Assignees: LG ELECTRONICS INC., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: JaYeong Kim, Hansung Leem, Dan Keun Sung, Yunjung Yi, Byounghoon Kim
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Patent number: 9860815Abstract: The present specification suggests a method for improving performance degradation caused by frequent handovers when a terminal moves among several cells, particularly among dense small cells. To this end, required are cooperative transmission among cells and a new handover method. A base station receives RSRP information about an anchor cell and a neighboring cell and configures a cooperation-based cell cluster using the RSRP information. If RSRP values are compared and meet specific conditions, the anchor cell and the neighboring cell carry out cooperative communication. If the RSRP values of the anchor cell and an anchor candidate cell are compared during the cooperative communication and meet specific conditions, handover from the anchor cell to the anchor candidate cell is carried out. If the present invention is applied, when the terminal moves in an environment where small cells are dense, the number of handovers is greatly reduced and thus network burden can be lessened.Type: GrantFiled: June 8, 2015Date of Patent: January 2, 2018Assignees: LG ELECTRONICS INC., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Yunjung Yi, Hansung Leem, Dan Keun Sung, JaYeong Kim, Byounghoon Kim
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Patent number: 9788344Abstract: Provided is a random access method of a node, the method including receiving spatial group information on spatial groups generated in a cell from a base station, identifying a spatial group corresponding to the node based on the spatial group information, transmitting a preamble signal to the base station by generating the preamble signal, and receiving a random access response message in response to the preamble signal.Type: GrantFiled: September 17, 2014Date of Patent: October 10, 2017Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Dan Keun Sung, Han Seung Jang, Su Min Kim, Kab Seok Ko, Ji Young Cha
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Publication number: 20170231012Abstract: User equipment (UE) that includes a processor and that executes a random access procedure with a base station (E-UTRAN Node B (eNodeB), also known as Evolved Node B) is provided. The UE can at least temporarily be embodied by the processor. The UE may comprise: a determination unit for determining a message size that can be transmitted and that corresponds to a physical random access channel according to an assigned communication method with the base station; a calculation unit for configuring a message to correspond to the message size and for respectively calculating a preamble index and at least one message index from the message; and an encoder for providing respective encoding of the preamble index and the at least one message index, and transmitting the same to the base station.Type: ApplicationFiled: February 23, 2016Publication date: August 10, 2017Inventors: Dan Keun SUNG, Han Seung JANG, Su Min KIM
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Publication number: 20170181051Abstract: The present specification suggests a method for establishing a terminal-centric group cell on the basis of measurement signal variation for cooperative transmission and handover in a mobile communication system. Specifically, a base station receives transmissions of parameters from a terminal, configures a terminal surrounding cell information table, and configures a cooperative cell cluster configuration table using the terminal surrounding cell information table as the terminal moves. The base station performs cooperative transmission and handover using the cooperative cell cluster configuration table. The terminal sends parameters to the base station periodically or when a certain condition is met, and the base station updates the terminal surrounding cell information table and the cooperative cell cluster configuration table using the parameters sent from the terminal to thereby use the same for mobility management.Type: ApplicationFiled: June 8, 2015Publication date: June 22, 2017Applicants: LG ELECTRONICS INC., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Yunjung YI, Hansung LEEM, Dan Keun SUNG, JaYeong KIM, Byounghoon KIM
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Publication number: 20170181122Abstract: The present specification suggests a method and an apparatus for more efficient mobility management through a hierarchical structure of a micro mobility management entity (MME) and a macro MME in a mobile communication system. Particularly, a second MME establishes a connection with a plurality of small cells included in a single macro cell. The second MME manages a single particular macro cell, and a first MME manages a plurality of macro cells, thereby providing a hierarchical structure. Additionally, the second MME transmits a paging message to a small cell in which a terminal is positioned, among the plurality of small cells included in a single macro cell. The second MME has information on the position of the terminal and can transmit the paging message to a particular small cell in which the terminal is positioned.Type: ApplicationFiled: March 27, 2015Publication date: June 22, 2017Applicants: LG ELECTRONICS INC., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: JaYeong KIM, Hansung LEEM, Dan Keun SUNG, Yunjung YI, Byounghoon KIM
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Publication number: 20170142630Abstract: The present specification suggests a method for improving performance degradation caused by frequent handovers when a terminal moves among several cells, particularly among dense small cells. To this end, required are cooperative transmission among cells and a new handover method. A base station receives RSRP information about an anchor cell and a neighboring cell and configures a cooperation-based cell cluster using the RSRP information. If RSRP values are compared and meet specific conditions, the anchor cell and the neighboring cell carry out cooperative communication. If the RSRP values of the anchor cell and an anchor candidate cell are compared during the cooperative communication and meet specific conditions, handover from the anchor cell to the anchor candidate cell is carried out. If the present invention is applied, when the terminal moves in an environment where small cells are dense, the number of handovers is greatly reduced and thus network burden can be lessened.Type: ApplicationFiled: June 8, 2015Publication date: May 18, 2017Applicants: LG ELECTRONICS INC., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Yunjung YI, Hansung LEEM, Dan Keun SUNG, JaYeong KIM, Byounghoon KIM
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Patent number: 9614783Abstract: A method for determining a source and a transmission path to provide content includes receiving a message comprising at least one of channel information of a link between a request device which requests content download and a central management device, available resource amount information of a candidate device, channel information of a link between the candidate device and the central management device, and channel information of a link between the request device and one candidate device. The method also includes determining a source device and the transmission path for providing the content to the request device using an available resource amount of the candidate device, a data rate of the link between the request device and the central management device, a data rate of the link between the request device and the candidate device, and a data rate of the link between the candidate device and the central management device.Type: GrantFiled: March 15, 2013Date of Patent: April 4, 2017Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Yongsuk Park, Sun-Mi Kim, Dan-Keun Sung, Chan-Hyun Youn, Jin-Won Kim, Ji-Young Cha, Tae-Hoon Kim, Dong-Ki Kang, Hee-Jae Kim, Yong-Sung Park, Young-Joo Han
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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: 9270753Abstract: A cloud service system includes at least one user device, a plurality of clouds for providing different cloud services, and a gateway connected between the user device and the clouds. The gateway selects at least one of the clouds according to predefined Service Level Agreement (SLA) information, and stores content provided from the user device to the selected cloud.Type: GrantFiled: March 12, 2013Date of Patent: February 23, 2016Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Yongsuk Park, Sun-Mi Kim, Chan-Hyun Youn, Dan-Keun Sung, Jin-Won Kim, Dong-Ki Kang, Hee-Jae Kim, Yong-Sung Park, Young-Joo Han, Tae-Hoon Kim, Ji-Young Cha
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Publication number: 20150305062Abstract: Provided is a random access method of a node, the method including receiving spatial group information on spatial groups generated in a cell from a base station, identifying a spatial group corresponding to the node based on the spatial group information, transmitting a preamble signal to the base station by generating the preamble signal, and receiving a random access response message in response to the preamble signal.Type: ApplicationFiled: September 17, 2014Publication date: October 22, 2015Inventors: Dan Keun Sung, Han Seung Jang, Su Min Kim, Kab Seok Ko, Ji Young Cha
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Patent number: 9167534Abstract: A method for reducing inter-cell interference (ICI) in a mobile communication system controls transmission signal power of an uplink signal from a terminal based on signal power measurement for a signal received from a base station of a neighboring cell. A terminal receives a signal from a base station of a neighboring cell via a wireless channel, measures a channel response against a threshold value across an applicable frequency band by using the received signal, determines a transmission signal power for each frequency band used for data transmission based on the measured channel response, and transmits data to a home cell base station according to the transmission signal power for each frequency band. The terminal may measure a channel response based on signals received from multiple base stations in multiple neighboring cells, and may also evaluate signal power of a signal transmitted from the home cell.Type: GrantFiled: March 6, 2012Date of Patent: October 20, 2015Assignee: Pantech Co., Ltd.Inventors: Dan Keun Sung, Bang Chul Jung