Lg Electronics Inc.

Ki Hyoung Cho

Yong Ho Kim

Min Seok Oh

Ji Wook Chung

Young Seob Lee

So Yeon Kim

Seung Hyun Kang

Ji Ae Seok

Ki Seon Ryu

Yong Won Kwak

Beom Joon Kim

Gi Seon Ryu

Kyu Hyuk Chung

Kyu-Hyuk Chung

Jae Hoon Chung

Sang Gook Kim

Hyung Jin Park

Jinsoo Choi

Sung Ho Moon

Jin Soo Choi

Wook Bong Lee

Young Cheul Yoon

Doo Hyun Sung

Hyung Ho Park

Beum Joon Kim

A method of receiving control information in a wireless communication system includes receiving position information for searching at least one downlink control channel, a downlink control channel carrying control information of at least one user equipment, receiving multiplexed downlink control channel in which a plurality of downlink control channels are sequentially multiplexed and sequentially searching the downlink control channel on the multiplexed downlink control channel according to the position information. The number of detection attempts to detect its own control information can be reduced.

Method of transmitting and receiving control information in wireless communication system

A method of scanning neighboring base stations for measuring channel quality in a wireless communication system includes receiving, by a mobile station from a serving base station, information associated with at least one neighboring base station; transmitting, by the mobile station to the serving base station, a scanning request message to request an allocation of a scanning interval for scanning, the scanning request message including parameters associated with a requested scan duration, a requested interleaving interval, and a requested scan iteration, wherein the requested interleaving interval is interleaved between each scan; and receiving, by the mobile station from the serving base station, a scanning response message including an allowed scan duration parameter in response to the scanning request message, wherein the allowed scan duration parameter is set to zero to indicate that the request for the allocation of the scanning interval is denied.

Scanning neighboring base stations in wireless access system

A method of scanning neighboring base stations for measuring channel quality in a wireless communication system includes receiving information associated with at least one neighboring base station; transmitting a scanning request message including parameters related to a requested scan duration, a requested interleaving interval and a requested scan iteration; and receiving a scanning response message in response to the scanning request message, the scanning response message including parameters related to an allowed scan duration, an allowed interleaving interval, a scan report mode, and an allowed scan iteration, wherein the scan report mode, which indicates a channel quality measurement reporting method, is set to '00' when the scan report mode indicates no report, set to '01' when the scan report mode indicates a periodic report, and set to &#x2018;10&#x2019; when the scan report mode indicates a event-triggered report.

A method for encoding data using a parity check matrix is disclosed. The method for encoding data using a parity check matrix comprises generating a fourth base matrix by applying a row permutation pattern and a column permutation pattern to rows and columns of a third base matrix, respectively, the third base matrix including a plurality of indexes, each of the plurality of indexes indicating a sub-matrix; generating the parity check matrix by replacing each index of the fourth base matrix with a corresponding sub-matrix; outputting an encoded bit stream by encoding an input bit stream using the generated parity check matrix; and permuting an order of sequences of the encoded bit stream according to an inverse of the column permutation pattern.

Method of encoding data using a low density parity check code

An interleaver provision method for providing a continuous length, an interleaving method, and a turbo-encoder thereof are disclosed. The interleaving method selects a basic interleaver having a proper length from among the basic interleaver set, which is predetermined to have the length represented by a multiple of the ARP fluctuation vector period. The interleaving method performs the dummy insertion and the pruning process to have the length acting as the basic-interleaver length, so that it can provide the ARP interleaver having a continuous length.

Method for interleaving continuous length sequence

A method of communicating data in a wireless communication system is disclosed. More specifically, a method discloses transmitting a request by a mobile subscriber station (MSS) to a network entity via a de-registration request message requesting the network entity to retain a preferred session information, and receiving a selected session information via a de-registration command response from the network entity.

Method of communicating data in a wireless mobile communication system

A method of encoding input data using a low density parity check (LDPC) code or decoding the encoded data is disclosed. Each index of a model matrix is expanded to an index matrix which includes two or more indexes. Each index included in the index matrix indicates a specific sub-matrix, and can be replaced with a corresponding sub-matrix to generate a parity check matrix.

Method of generating a parity check matrix for LDPC encoding and decoding

An encoding and decoding method and apparatus. is disclosed. The method and apparatus improves encoding and decoding performance without using a large memory capacity and also reduces the complexity of hardware for implementation. According to the method, an encoded signal is received from a transmitting side, and the received signal is decoded using the parity check matrix. The parity check matrix includes layers where nonzero elements of a specific number or layers do not overlap in column direction.

Apparatus and method for decoding using channel code

Methods of transmitting data using a plurality of hybrid automatic repeat request (HARQ) process channels sequentially is disclosed. One of the methods of transmitting data through a plurality of HARQ process channels including a first channel and a second channel includes adding offset to a retransmission data block if the first channel which will transmit the retransmission data block is prescheduled (S) by another data block, the offset representing the difference in a transmission timing point between the second channel in which positive acknowledgement (ACK) signal has been received (S) and the first channel; transmitting the retransmission data block through the second channel; and transmitting a data block corresponding to the second channel through the first channel.

Method of transmitting data using a plurality of HARQ process channels sequentially

A method of encoding data using a parity check matrix, a method of decoding encoded data, and a data retransmission method using the same are disclosed. A data retransmission method in a communication system includes transmitting a codeword encoded by a first parity check matrix corresponding to a first coding rate, among at least two parity check matrixes corresponding to different coding rates, receiving NACK from the receiver in response to the codeword, and transmitting parity bits encoded by some of the second parity check matrix corresponding to a second coding rate, among the at least two parity check matrixes, to the receiver.

Method of encoding/decoding using low density check code matrix

Scanning neighboring base stations in a wireless access system is provided. In one embodiment, a method of scanning neighboring base stations for assessing channel quality includes receiving from a serving base station information associated with at least one neighboring base station, and transmitting a scanning request message from a mobile subscriber station to the serving base station, wherein the scanning request message comprises a requested scan duration and a requested scan iteration, the requested scan iteration being associated with a requested number of iterations of the scanning of the at least one neighboring base station. The method also includes receiving a scanning response message from the serving base station, wherein the scanning response message comprises an allowed scan duration and an allowed scan iteration, the allowed scan iteration being associated with an allowed number of iterations of the scanning of the at least one neighboring base station.

A data transmitting and receiving method is disclosed. In transmitting a response signal for a transmission signal from at least one transmitter, the present invention includes receiving at least one data block from the at least one transmitter, the at least one data block grouped into at least one group and then transmitted by the at least one transmitter, checking whether each data block is successfully received for the at least one data block belonging to the corresponding group per the group, selecting a transmission scheme of transmitting a response signal instructing a presence or non-presence of successful reception of the each data block to the at least one transmitter, and transmitting a response signal for the each data block to the at least one transmitter by the selected response signal transmission scheme. Hence, the present invention reduces overhead of control information necessary for data transmission.

Methods of transmitting and receiving data in communication system

A method of encoding data using low density parity check (LDPC) code defined by a m&#xd7;n parity check matrix is disclosed. More specifically, the method includes encoding input source data using the parity check matrix, wherein the parity check matrix comprises a plurality of z&#xd7;z sub-matrices of which row weights and column weights are '0' or '1'.

Growing community of inventors

Anyang-si, South Korea

Ki Hyoung Cho