Patents by Inventor Sung Lark Kwon
Sung Lark Kwon 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: 20070171889Abstract: Embodiments of the present invention may provide an apparatus and a method for transmitting and receiving a random access channel (RACH) in a single carrier-frequency division multiple access (SC-FDMA) system. A frequency domain RACH signal may be mapped to a localized sub-frequency band of an entire frequency band available to the SC-FDMA system. A guard band including at least one sub carrier may be allocated between the RACH signal band and other channel signal bands. A guard time may be allocated between the RACH signal and other channel signals in the time domain. The RACH signal may include a short message including information related to a mobile station. The RACH signal may be detected in a frequency based method, a time based method or a sliding matched filter based method. Receiver complexity can be decreased if the RACH signal includes a CAZAC code sequence for a preamble. In such a case, a receive delay may be simply calculated and then adjusted more accurately.Type: ApplicationFiled: January 17, 2007Publication date: July 26, 2007Inventors: Sung Lark Kwon, Dong Joo Park, Hyuck Chan Kwon, Young Kwon Ryu, Hoo Young Jeong, Hong Jik Kim, Jung Seung Lee, Jae Won Jang, Byoung Seong Park, Hee Gul Park
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Patent number: 7190691Abstract: A method of controlling timing for an uplink synchronous transmission scheme is disclosed, including combining time alignment bit (TAB) information transmitted received during a predetermined period, determining a timing renewal value based on the combination, and controlling the transmission timing according to the timing renewal value. Thus, the TAB information transmitted by a base station may be used to synchronize the uplink transmissions of mobile communication devices.Type: GrantFiled: February 21, 2002Date of Patent: March 13, 2007Assignee: LG Electronics Inc.Inventors: Seung Hoon Hwang, Bong Hoe Kim, Sung Lark Kwon
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Patent number: 7089480Abstract: A rate matching method is provided for a mobile communication system that performs an adjustment to a code rate based on an optimal level by puncturing or repetition to respective bit streams of transport channels. The rate matching method is preferably applicable to uplink and downlink rate matching for channel coding including turbo coding, convolutional coding and the like. The rate matching method for uplink can include executing coding for bits of a transport channel, and branching off the bits into a plurality of sequences, constructing a first interleaving pattern for the plurality of sequences, constructing a virtual interleaving pattern for at least one sequence based on a mapping rule with a corresponding first interleaving pattern and calculating different bit shifting values in each column of each virtual interleaving pattern. Then, a bit position to be punctured is determined in each constructed virtual interleaving pattern using the calculated bit shifting values.Type: GrantFiled: July 21, 2003Date of Patent: August 8, 2006Assignee: LG Information & Communications, Ltd.Inventors: Young Woo Yun, Ki Jun Kim, Sung Lark Kwon, Young Jo Lee, Sung Kwon Hong
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Patent number: 7076726Abstract: A method for matching a rate in a mobile communication system causes puncturing or repetition in a fixed pattern, in which puncturing or repetition is applied to each bitstream on transport channels supporting different services in a next generation mobile communication system of the W-CDMA (Wideband Code Division Multiple Access) system.Type: GrantFiled: August 23, 2000Date of Patent: July 11, 2006Assignee: LG Information & Communication, Ltd.Inventors: Young Woo Yun, Sung Kwon Hong, Sung Lark Kwon, Young Jo Lee
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Publication number: 20060148508Abstract: A communication system having multiple channels is disclosed. An apparatus for controlling outer loop power in the communication system having the multiple channels includes a step adjustment unit for re-setting height of a step size for power controlling with reference to a CRC result, when the CRC result is received from a base station; and a power controller for determining a target signal to interference ratio (SIR) with reference to the CRC result and the re-set step size information, and transmitting the determined target SIR to the base station. Power controlling operation can be more effectively performed in the communication system having the multiple channels.Type: ApplicationFiled: December 28, 2005Publication date: July 6, 2006Inventors: Hoo-Young Jeong, Sung-Lark Kwon, Hong-Jik Kim, Hee-Gul Park
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Publication number: 20060150051Abstract: An apparatus and method for maximizing throughout for HARQ transmissions is provided. Systematic and prodeduralized RV selection is facilitated by determining the parameter āsā by using two important factors affecting the system throughout, specifically the coding gain varying according to the code rate and the balance between energy per systematic bit and energy per parity bit.Type: ApplicationFiled: December 29, 2005Publication date: July 6, 2006Inventors: Sung-Lark Kwon, Hee-Gul Park, Hong-Jin Kim, Hoo-Young Jeong
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Patent number: 7068613Abstract: Disclosed is a method of transmitting emergency stop control information on a common packet channel (CPCH) in a mobile communication system, which can perform an emergency stop within a less period of time when the user equipment is in a state of transmitting a packet through the CPCH by rapidly transmitting he emergency stop control information. The method of transmitting emergency stop control information on a CPCH is a radio mobile communication system comprises a first step of inserting and transmitting a predetermined bit pattern to a downlink (DL) dedicated physical channel (DPCH) by a universal mobile terrestrial radio access network (UTRAN), a second step of recognizing the particular bit pattern by the UE, and a third step of controlling data transmission through an uplink (UL) CPCH by the UE.Type: GrantFiled: November 24, 2000Date of Patent: June 27, 2006Assignee: LG Electronics Inc.Inventors: Sung Lark Kwon, Jin Sung Choi, Young Dae Lee
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Patent number: 7061878Abstract: Disclosed is a method of transmitting emergency stop control information on a common packet channel (CPCH) in a mobile communication system, which can perform an emergency stop within a less period of time when the user equipment is in a state of transmitting a packet through the CPCH by rapidly transmitting he emergency stop control information. The method of transmitting emergency stop control information on a CPCH is a radio mobile communication system comprises a first step of inserting and transmitting a predetermined bit pattern to a downlink (DL) dedicated physical channel (DPCH) by a universal mobile terrestrial radio access network (UTRAN), a second step of recognizing the particular bit pattern by the UE, and a third step of controlling data transmission through an uplink (UL) CPCH by the UE.Type: GrantFiled: December 10, 2004Date of Patent: June 13, 2006Assignee: LG Electronics Inc.Inventors: Sung Lark Kwon, Jin Sung Choi, Young Dae Lee
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Patent number: 7058038Abstract: A method for allocating common packet channels in a next generation mobile communication system is disclosed. A mobile station maps a signature for indicating a specific common packet channels with scrambling codes and transmits an access preamble including the signature to a system to request allocation of the channel. The system maps a signature of a channel assignment for a desired common packet channel with the scrambling codes to transmit it to the mobile station. The mobile station transmits a message to the system through a corresponding physical channel in accordance with the channel assignment. The mobile station can transmit a collision detection preamble for preventing channel collision to the system by mapping with a specific scrambling code set. At this time, the system can select a scrambling code from a scrambling code set designated by the collision detection preamble and can map the selected scrambling code with the channel assignment.Type: GrantFiled: February 2, 2001Date of Patent: June 6, 2006Assignee: LG Electronics Inc.Inventors: Seung June Yi, Young Dae Lee, Sung Lark Kwon
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Patent number: 7027828Abstract: In a mobile communication system including SRNC and DRNC for controlling a plurality of base station, and mobile stations, a method for controlling power of TFCI field for DSCH if DSCH-associated DCH exists in a soft handover situation includes determining whether a base station which transmits DSCH is a primary base station or not, number of base stations that transmits TFCI2, where the TFCI2 is information on the DSCH, setting a power offset according to a result of the determination, and transmitting the TFCI2 using the set power offset.Type: GrantFiled: November 16, 2001Date of Patent: April 11, 2006Assignee: LG Electronics Inc.Inventors: Bong-Hoe Kim, Sung-Lark Kwon, Seung-Hoon Hwang, Dug-In Lyu, Dong-Wook Roh, Jin-Young Park, Eun-Jung Kim
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Publication number: 20050105502Abstract: A TFCI transmission scheme using optimal TFCI transmission bit patterns for the DPCH and DSCH in the hard split mode of the W-CDMA standard. The DPCH TFCI bits (TFCI1) and the DSCH TFCI bits (TFCI2) are mapped to their corresponding bit positions and then transmitted such that TFCI code word errors are minimized and communication reliability is improved. When the TFCI1 to TFCI2 ratio is 5:5, the TFCI transmission bit pattern has alternating TFCI1 and TFCI2 bits. For other ratios, such as 1:9. 2:8, 3:7, and 4:6, the bit patterns are obtained by considering situations where the number of TFCI bits is 6 or 7, while bit patterns for respective conjugate ratios (9:1, 8:2, 7:3, and 6:4) are obtained by reversing all 0 and 1 bits of the previously obtained bit pattern for that ratio.Type: ApplicationFiled: May 13, 2004Publication date: May 19, 2005Inventors: Bong-Hoe Kim, Sung-Lark Kwon
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Publication number: 20040125765Abstract: A rate matching method is provided for a mobile communication system that performs an adjustment to a code rate based on an optimal level by puncturing or repetition to respective bit streams of transport channels. The rate matching method is preferably applicable to uplink and downlink rate matching for channel coding including turbo coding, convolutional coding and the like. The rate matching method for uplink can include executing coding for bits of a transport channel, and branching off the bits into a plurality of sequences, constructing a first interleaving pattern for the plurality of sequences, constructing a virtual interleaving pattern for at least one sequence based on a mapping rule with a corresponding first interleaving pattern and calculating different bit shifting values in each column of each virtual interleaving pattern. Then, a bit position to be punctured is determined in each constructed virtual interleaving pattern using the calculated bit shifting values.Type: ApplicationFiled: July 21, 2003Publication date: July 1, 2004Applicant: LG Information & Communications, Ltd.Inventors: Young Woo Yun, Ki Jun Kim, Sung Lark Kwon, Young Jo Lee, Sung Kwon Hong
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Publication number: 20040047436Abstract: Apparatus and method for determining a fixed point in a mobile communication system are disclosed. An initial fixed point is set through simulation and a saturation for an output of a target device is compared with a reference saturation. Then, the position of the initial fixed point is adaptively changed according to the change in the output range of the target device. Therefore, when a floating point is converted into a fixed point, the performance of the system can be improved while the complexity of the hardware can be reduced.Type: ApplicationFiled: May 28, 2003Publication date: March 11, 2004Inventors: Tan Joong Park, Sung Lark Kwon, Hee Gul Park
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Patent number: 6622281Abstract: A rate matching method is provided for a mobile communication system that performs an adjustment to a code rate based on an optimal level by puncturing or repetition to respective bit streams of transport channels. The rate matching method is preferably applicable to uplink and downlink rate matching for channel coding including turbo coding, convolutional coding and the like. The rate matching method for uplink can include executing coding for bits of a transport channel, and branching off the bits into a plurality of sequences, constructing a first interleaving pattern for the plurality of sequences, constructing a virtual interleaving pattern for at least one sequence based on a mapping rule with a corresponding first interleaving pattern and calculating different bit shifting values in each column of each virtual interleaving pattern. Then, a bit position to be punctured is determined in each constructed virtual interleaving pattern using the calculated bit shifting values.Type: GrantFiled: July 13, 2000Date of Patent: September 16, 2003Assignee: LG Information & Communications, Ltd.Inventors: Young Woo Yun, Ki Jun Kim, Sung Lark Kwon, Young Jo Lee, Sung Kwon Hong
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Publication number: 20020114314Abstract: A method of controlling timing for an uplink synchronous transmission scheme is disclosed, including combining time alignment bit (TAB) information transmitted received during a predetermined period, determining a timing renewal value based on the combination, and controlling the transmission timing according to the timing renewal value. Thus, the TAB information transmitted by a base station may be used to synchronize the uplink transmissions of mobile communication devices.Type: ApplicationFiled: February 21, 2002Publication date: August 22, 2002Applicant: LG Electronics Inc.Inventors: Seung Hoon Hwang, Bong Hoe Kim, Sung Lark Kwon
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Publication number: 20020061764Abstract: In a mobile communication system including SRNC and DRNC for controlling a plurality of base station, and mobile stations, a method for controlling power of TFCI field for DSCH if DSCH-associated DCH exists in a soft handover situation includes determining whether a base station which transmits DSCH is a primary base station or not, number of base stations that transmits TFCI2, where the TFCI2 is information on the DSCH, setting a power offset according to a result of the determination, and transmitting the TFCI2 using the set power offset.Type: ApplicationFiled: November 16, 2001Publication date: May 23, 2002Applicant: LG Electronics, Inc.Inventors: Bong-Hoe Kim, Sung-Lark Kwon, Seung-Hoon Hwang, Dug-In Lyu, Dong-Wook Roh, Jin-Yong Park, Eun-Jung Kim
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Patent number: 6341125Abstract: Method for improving a TFCI transportation performance, including the steps of (1) coding TFCI information bits to be transported through each radio frame, (2) repeating a TFCI code word produced by the coding for an arbitrary times, (3) applying puncturing patterns different from each other to the repeated code words produced as many as the repeated times, and puncturing the repeated code words at locations different from each other, and (4) dividing, inserting, and transporting the punctured fixed length repeated code words in each slot of the radio frame, whereby improving TFCI information transportation performance, and embodying the receiver side decoder to be identical to a case when a 32 bit code word are transported perfectly.Type: GrantFiled: November 17, 2000Date of Patent: January 22, 2002Assignee: LG Electronics Inc.Inventors: Sung Kwon Hong, Sung Lark Kwon, Young Woo Yun, Ki Jun Kim
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Publication number: 20010012301Abstract: A method for allocating Common Packet Channels CPCHs in a next generation mobile communication system is disclosed. A mobile station maps a signature for indicating a specific CPCH with scrambling codes and transmits an access preamble including the signature to a system to request allocation of the channel. The system maps a signature of a CA-ICH for a desired CPCH with the scrambling codes to transmit it to the mobile station. The mobile station transmits a message to the system through a corresponding physical channel in accordance with the CA-ICH. The mobile station can transmit a CD-P for preventing channel collision to the system by mapping with a specific scrambling code set. At this time, the system can select a scrambling code from a scrambling code set designated by the CD-P and can map the selected scrambling code with the CA-ICH.Type: ApplicationFiled: February 2, 2001Publication date: August 9, 2001Applicant: LG Electronics Inc.Inventors: Seung June Yi, Young Dae Lee, Sung Lark Kwon