Patents by Inventor Jin-Kyu Koo
Jin-Kyu Koo 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: 9405697Abstract: A method for managing memory using a virtual memory manager includes receiving a memory allocation request, allocating memory of a physical address space in response to the memory allocation request, mapping an address value of the memory allocated in the physical address space to consecutive primary virtual address space, and mapping the address value of the primary virtual address space to one of a first and second secondary virtual address spaces to process a new memory allocation request in a situation where memory a fragmentation occurs. Other embodiments are also disclosed. The methods and apparatuses of the present disclosure are capable of moving active memory blocks of the fragmented virtual memory space to another virtual memory space to resolve the memory fragmentation even when a memory fragmentation occurs.Type: GrantFiled: June 17, 2014Date of Patent: August 2, 2016Assignee: Samsung Electronics Co., Ltd.Inventors: Jin Kyu Koo, Sang-Bok Han, Myung Sun Kim, In Choon Yeo
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Publication number: 20140372726Abstract: A method for managing memory using a virtual memory manager includes receiving a memory allocation request, allocating memory of a physical address space in response to the memory allocation request, mapping an address value of the memory allocated in the physical address space to consecutive primary virtual address space, and mapping the address value of the primary virtual address space to one of a first and second secondary virtual address spaces to process a new memory allocation request in a situation where memory a fragmentation occurs. Other embodiments are also disclosed. The methods and apparatuses of the present disclosure are capable of moving active memory blocks of the fragmented virtual memory space to another virtual memory space to resolve the memory fragmentation even when a memory fragmentation occurs.Type: ApplicationFiled: June 17, 2014Publication date: December 18, 2014Inventors: Jin Kyu Koo, Sang-Bok Han, Myung Sun Kim, In Choon Yeo
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Patent number: 8644270Abstract: A method and system for configuring a frame in a communication system is provided.Type: GrantFiled: February 22, 2008Date of Patent: February 4, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Jeong-Ho Park, Kwan-Hee Roh, Jae-Hee Cho, Tae-Young Kim, Jin-Kyu Koo, Dong-Seek Park, Ho-Kyu Choi
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Patent number: 8355474Abstract: An apparatus and method for interference cancellation in multiple-antenna communication system is disclosed. Accordingly, a receiver of a multiple-antenna communication system cancels interference by selecting either a multiple-symbol processing scheme or a single-symbol processing scheme depending on a signal type, thereby improving performance of the communication system.Type: GrantFiled: April 4, 2008Date of Patent: January 15, 2013Assignee: Samsung Electronics Co., LtdInventors: Elisabeth De Carvalho, Muhammad Imadur Rahman, David Mazzarese, Yang Tang, Jin-Kyu Koo
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Patent number: 8300572Abstract: A method and system for controlling power in a communication system are provided, in which a base station calculates a power control value for an mobile station based on feedback information received from the mobile station, transmits power control information including the power control value to the mobile station, measures the strength of a signal received corresponding to the transmit power control information from the mobile station, determines the status of the mobile station using the signal strength and the power control value, and schedules the mobile station according to the determination.Type: GrantFiled: December 27, 2007Date of Patent: October 30, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Kwan-Hee Roh, Jae-Hee Cho, Jeong-Ho Park, Tae-Young Kim, Jin-Kyu Koo
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Patent number: 8175045Abstract: An apparatus and a method for transmitting uplink feedback data in a broadband wireless mobile communication are provided. The method comprises dividing tiles used as a feedback channel into a preset number of groups, selecting one group among the preset number of groups using a downlink channel, selecting a number of tiles, the number of tiles being equal to a number of tiles required for feedback data transmission in the selected group, and mapping feedback data to each selected tile. Thereby, feedback information can be transmitted via a tile selected by a terminal based on a channel state without a process of allocating and reallocating an additional feedback channel, thus enhancing efficiency of uplink wireless resources.Type: GrantFiled: March 17, 2008Date of Patent: May 8, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Kwan-Hee Roh, Jin-Kyu Koo, Jae-Hee Cho, Jeong-Ho Park, Tae-Young Kim, Soon-Young Yoon, Ho-Kyu Choi
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Patent number: 8059525Abstract: A ranging apparatus in a communication system is provided. A terminal generates a ranging code for ranging with a base station, maps the ranging code to at least one sub-carrier so the ranging code is repeated in a time domain, generates a ranging signal so the mapped ranging code has a size of one symbol interval, and transmits the generated ranging signal to the base station. The base station receives a ranging signal, extracts a half signal of a valid symbol interval of the ranging signal, generates a valid symbol interval signal by repeating the extracted half signal of the valid symbol interval, restores a ranging signal using the valid symbol interval signal, and performs ranging using the ranging signal.Type: GrantFiled: September 5, 2006Date of Patent: November 15, 2011Assignee: Samsung Electronics Co., LtdInventors: Jin-Kyu Koo, Young-Kwon Cho, Chang-Yoon Oh, Su-Ryong Jeong, Tae-Young Kim, Dong-Seek Park, Jun-Young Jung, Joon-Young Choi, Eun-Taek Lim, Chang-Ho Suh, Jae-Hyuk Jang
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Patent number: 8045596Abstract: An apparatus for transmitting/receiving a signal in a communication system is provided. A Mobile Station (MS) spreads a transmission signal to generate a spreading signal, receives, from a Base Station (BS), information on a second spreading signal transmission region, extended from a first spreading signal transmission region, and maps the generated spreading signal to a subcarrier in the second spreading signal transmission region. A Base Station (BS) transmits information on a second spreading signal transmission region extended from a first spreading signal transmission region, for reception of a spreading signal, receives a spreading signal mapped to subcarriers over the second spreading signal transmission region, from an Mobile Station (MS), detects a spreading signal from the spread signal mapped to the subcarriers, and despreads the detected spreading signal to restore a transmission signal.Type: GrantFiled: February 5, 2008Date of Patent: October 25, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-Hee Cho, Jin-Kyu Koo, Jeong-Ho Park, Kwan-Hee Roh, Tae-Young Kim, Soon-Young Yoon
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Patent number: 8023897Abstract: In a control method of a communication system, a Base Station (BS) receives noise and interference information from at least one neighboring BS in charge of a neighboring cell being adjacent to a serving cell of the BS, calculates a control value of Mobile Stations (MSs) located in the serving cell according to the received noise and interference information, and generates control information according to the calculated control value, and transmits the generated control information to the MSs.Type: GrantFiled: July 5, 2007Date of Patent: September 20, 2011Assignee: Samsung Electronics Co., LtdInventors: Jae-Hee Cho, Jeong-Ho Park, Kwan-Hee Roh, Tae-Young Kim, Jin-Kyu Koo
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Patent number: 7949034Abstract: Provided is an apparatus and method for estimating an uplink frequency offset in a wireless communication system. In a receiving apparatus of a wireless communication system using a random access channel composed of two equivalent sequences, the apparatus includes a channel receiver which extracts samples corresponding to the two sequences from an input random access channel signal; a correlator which computes first and second correlation values by correlating preceding and trailing samples among the samples output from the channel receiver with a predetermined sequence; and a frequency offset estimator which estimates a frequency offset by using a ratio of the second correlation value to the first correlation value output from the correlator.Type: GrantFiled: April 16, 2007Date of Patent: May 24, 2011Assignee: Samsung Electronics Co., LtdInventors: Huan Cong Nguyen, Elisabeth De Carvalho, Jin-Kyu Koo, Su-Ryong Jeong, Young-Kwon Cho, Jae-Weon Cho, Dong-Seek Park, Ho-Kyu Choi
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Patent number: 7852813Abstract: A system for performing cell acquisition in a frequency overlay communication system having a first frequency band and a second frequency band including the first frequency band. A base station (BS) generates a reference signal used for identifying a cell using a specific sequence in a predetermined frequency band, and transmits the reference signal. A mobile station (MS) receives the reference signal to determine whether the BS uses the first frequency band or the second frequency band, determines a reference signal having a maximum correlation value through correlation calculation with at least one predefined sequence, and detects a BS identifier (ID) corresponding to the determined reference signal.Type: GrantFiled: August 25, 2006Date of Patent: December 14, 2010Assignee: Samsung Electronics Co., LtdInventors: Chang-Ho Suh, Jin-Kyu Koo, Dong-Seek Park, Young-Kwon Cho, Eun-Taek Lim, Jung-Soo Woo
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Patent number: 7839761Abstract: A method and apparatus for transmitting and receiving MAP information in a communication system are provided. A base station acquires channel quality information of each mobile station, generates sub-MAPs using MAP information, to which at least one of a coding scheme, a modulation scheme and a repetition scheme is applied, separately for each mobile station according to the channel quality information, and transmits the generated sub-MAPs. A mobile station receives MAP information from the base station, detects a sub-MAP allocated to the mobile station from the received MAP information, and restores the detected sub-MAP to MAP information using at least one of a corresponding decoding scheme, demodulation scheme and repetition scheme corresponding to coding scheme, modulation scheme and repetition scheme applied in the base station, based on channel quality information of the mobile station. Accordingly, system overhead can be reduced.Type: GrantFiled: February 25, 2008Date of Patent: November 23, 2010Assignee: Samsung Electronics Co., LtdInventors: Tae-Young Kim, Jae-Hee Cho, Jae-Weon Cho, Jeong-Ho Park, Kwan-Hee Roh, Jin-Kyu Koo
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Patent number: 7801532Abstract: A method for transmitting a signal by a transmitter in a frequency overlay communication system. The method includes generating y first signal groups by shuffling input information data with a length yN on an N-by-N grouping basis according to a first shuffling scheme; generating y second signal groups by performing N-point IFFT on each of the first signal groups; generating y third signal groups by multiplying each of the second signal groups by preset values; generating N fourth signal groups by de-shuffling the third signal groups on a y-by-y grouping basis according to a de-shuffling scheme; generating N fifth signal groups by performing y-point IDFT on each of the fourth signal groups; generating y sixth signal groups by shuffling the fifth signal groups according to a second shuffling scheme, and serial-converting the sixth signal groups; and performing a transmission RF process on the serial-converted signal and transmitting the RF-processed signal to a receiver.Type: GrantFiled: June 29, 2006Date of Patent: September 21, 2010Assignee: Samsung Electronics Co., LtdInventors: Chang-Ho Suh, Dong-Seek Park, Young-Kwon Cho, Eun-Taek Lim, Jin-Kyu Koo, Jung-Soo Woo
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Patent number: 7801226Abstract: Provided is a method and apparatus for transmitting/receiving data in a frequency overlay communication system. A transmitter generates a data stream for data transmission, and performs Inverse Fast Fourier Transform (IFFT) on the generated data stream according to a predetermined first frequency band before transmission. Upon receiving a particular signal, a receiver performs Fast Fourier Transform (FFT) on the received signal according to a predetermined second frequency band, and restores the received signal.Type: GrantFiled: May 30, 2006Date of Patent: September 21, 2010Assignee: Samsung Electronics Co., LtdInventors: Chang-Ho Suh, Dong-Seek Park, Sung-Kwon Hong, Young-Kwon Cho, Jin-Kyu Koo, Jung-Soo Woo
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Patent number: 7768987Abstract: A frequency resource operating apparatus and method for transmitting and receiving data at a different hopping pattern speed according to a CSI in a BWA communication system are provided. In a method of transmitting and receiving data using CSI in a mobile communication system, a BS sets the CSI of an MS to an initial CSI and sends data to the MS according to the initial CSI. The MS sends a downlink CSI to the BS. The BS groups the MS based on the downlink CSI and sends data to the MS according to a hopping pattern for the group of the MS among hopping patterns preset for predetermined groups.Type: GrantFiled: September 26, 2006Date of Patent: August 3, 2010Assignee: Samsung Electronics Co., LtdInventors: Muhammad Imadur Rahman, Ragnar ViƓir Reynisson, Frank Hanns Paul Fitzek, Ramjee Prasad, Jin-Kyu Koo, Dong-Seek Park, Young-Kwon Cho, Young-Kyun Kim, Eun-Taek Lim, Jun-Young Jung
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Publication number: 20080248773Abstract: An apparatus and method for interference cancellation in multiple-antenna communication system is disclosed. Accordingly, a receiver of a multiple-antenna communication system cancels interference by selecting either a multiple-symbol processing scheme or a single-symbol processing scheme depending on a signal type, thereby improving performance of the communication system.Type: ApplicationFiled: April 4, 2008Publication date: October 9, 2008Applicant: Sumsung Electronics Co., Ltd.Inventors: Elisabeth DE CARVALHO, Muhammad Imadur Rahman, David Mazzarese, Yang Tang, Jin-Kyu Koo
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Publication number: 20080232312Abstract: An apparatus and a method for transmitting uplink feedback data in a broadband wireless mobile communication are provided. The method comprises dividing tiles used as a feedback channel into a preset number of groups, selecting one group among the preset number of groups using a downlink channel, selecting a number of tiles, the number of tiles being equal to a number of tiles required for feedback data transmission in the selected group, and mapping feedback data to each selected tile. Thereby, feedback information can be transmitted via a tile selected by a terminal based on a channel state without a process of allocating and reallocating an additional feedback channel, thus enhancing efficiency of uplink wireless resources.Type: ApplicationFiled: March 17, 2008Publication date: September 25, 2008Applicant: SAMSUNG ELECTRONICS CO. LTD.Inventors: Kwan-Hee ROH, Jin-Kyu KOO, Jae-Hee CHO, Jeong-Ho PARK, Tae-Young KIM, Soon-Young YOON, Ho-Kyu CHOI
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Publication number: 20080232343Abstract: Provided is an apparatus and method for estimating an uplink frequency offset in a wireless communication system. In a receiving apparatus of a wireless communication system using a random access channel composed of two equivalent sequences, the apparatus includes a channel receiver which extracts samples corresponding to the two sequences from an input random access channel signal; a correlator which computes first and second correlation values by correlating preceding and trailing samples among the samples output from the channel receiver with a predetermined sequence; and a frequency offset estimator which estimates a frequency offset by using a ratio of the second correlation value to the first correlation value output from the correlator.Type: ApplicationFiled: April 16, 2007Publication date: September 25, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Huan Cong Nguyen, Elisabeth De Carvalho, Jin-Kyu Koo, Su-Ryong Jeong, Young-Kwon Cho, Jae-Weon Cho, Dong-Seek Park, Ho-Kyu Choi
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Publication number: 20080212531Abstract: A method and system for transmitting a signal in a communication system is disclosed, in which a BS transmits control information in a predetermined third zone of a frame, the frame being divided into a first and a second zones in frequency and the third zone being included in the first zone, and transmits a data burst in at least one of a fourth zone and the second zone, the fourth zone being a remaining zone of the first zone other than the third zone.Type: ApplicationFiled: March 3, 2008Publication date: September 4, 2008Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jeong-Ho Park, Tae-Young Kim, Jae-Hee Cho, Nam-Gi Kim, Kwan-Hee Roh, Jin-Kyu Koo
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Publication number: 20080205258Abstract: A method and apparatus for transmitting and receiving MAP information in a communication system are provided. A base station acquires channel quality information of each mobile station, generates sub-MAPs using MAP information, to which at least one of a coding scheme, a modulation scheme and a repetition scheme is applied, separately for each mobile station according to the channel quality information, and transmits the generated sub-MAPs. A mobile station receives MAP information from the base station, detects a sub-MAP allocated to the mobile station from the received MAP information, and restores the detected sub-MAP to MAP information using at least one of a corresponding decoding scheme, demodulation scheme and repetition scheme corresponding to coding scheme, modulation scheme and repetition scheme applied in the base station, based on channel quality information of the mobile station. Accordingly, system overhead can be reduced.Type: ApplicationFiled: February 25, 2008Publication date: August 28, 2008Applicant: SAMSUNG ELECTRONICS CO. LTD.Inventors: Tae-Young KIM, Jae-Hee CHO, Jae-Weon CHO, Jeong-Ho PARK, Kwan-Hee ROH, Jin-Kyu KOO