Patent application number | Description | Published |
20090036124 | SCANNING NEIGHBORING BASE STATIONS IN WIRELESS ACCESS SYSTEM - 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. | 02-05-2009 |
20090185519 | METHOD OF UPDATING CHANNEL INFORMATION BY A MOBILE STATION THAT IS IN POWER SAVING MODE - A method of updating channel information by a mobile station (MS) that is in power saving mode is disclosed. More specifically, the method includes the MS which receives status information of a first channel descriptor and transmission frame information which includes when the first channel descriptor is to be transmitted. Furthermore, the MS compares status information of the first channel descriptor with status information of a second channel descriptor. Here, the second channel descriptor is stored in the MS. Lastly, if the compared status information are different, the MS receives the first channel descriptor according to the transmission frame information. | 07-23-2009 |
20090191908 | METHOD OF UPDATING CHANNEL INFORMATION BY A MOBILE STATION THAT IS IN POWER SAVING MODE - A method of updating channel information by a mobile station (MS) that is in power saving mode is disclosed. More specifically, the method includes the MS which receives status information of a first channel descriptor and transmission frame information which includes when the first channel descriptor is to be transmitted. Furthermore, the MS compares status information of the first channel descriptor with status information of a second channel descriptor. Here, the second channel descriptor is stored in the MS. Lastly, if the compared status information are different, the MS receives the first channel descriptor according to the transmission frame information. | 07-30-2009 |
20090191909 | METHOD OF UPDATING CHANNEL INFORMATION BY A MOBILE STATION THAT IS IN POWER SAVING MODE - A method of updating channel information by a mobile station (MS) that is in power saving mode is disclosed. More specifically, the method includes the MS which receives status information of a first channel descriptor and transmission frame information which includes when the first channel descriptor is to be transmitted. Furthermore, the MS compares status information of the first channel descriptor with status information of a second channel descriptor. Here, the second channel descriptor is stored in the MS. Lastly, if the compared status information are different, the MS receives the first channel descriptor according to the transmission frame information. | 07-30-2009 |
20090197601 | METHOD OF UPDATING CHANNEL INFORMATION BY A MOBILE STATION THAT IS IN POWER SAVING MODE - A method of updating channel information by a mobile station (MS) that is in power saving mode is disclosed. More specifically, the method includes the MS which receives status information of a first channel descriptor and transmission frame information which includes when the first channel descriptor is to be transmitted. Furthermore, the MS compares status information of the first channel descriptor with status information of a second channel descriptor. Here, the second channel descriptor is stored in the MS. Lastly, if the compared status information are different, the MS receives the first channel descriptor according to the transmission frame information. | 08-06-2009 |
20090199067 | METHOD AND APPARATUS OF ENCODING AND DECODING DATA USING LOW DENSITY PARITY CHECK CODE IN A WIRELESS COMMUNICATION SYSTEM - A method of encoding data using low density parity check (LDPC) code defined by a m×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×z sub-matrices of which row weights and column weights are ‘0’ or ‘1’. | 08-06-2009 |
20090199068 | METHOD AND APPARATUS OF ENCODING AND DECODING DATA USING LOW DENSITY PARITY CHECK CODE IN A WIRELESS COMMUNICATION SYSTEM - A method of encoding data using low density parity check (LDPC) code defined by a m×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×z sub-matrices of which row weights and column weights are ‘0’ or ‘1’. | 08-06-2009 |
20100023844 | METHOD FOR INTERLEAVING CONTINUOUS LENGTH SEQUENCE - 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. | 01-28-2010 |
20100031110 | METHODS OF TRANSMITTING AND RECEIVING DATA IN COMMUNICATION SYSTEM - 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. | 02-04-2010 |
20100115360 | METHODS OF TRANSMITTING DATA USING A PLURALITY OF HARQ PROCESS CHANNESL SEQUENTIALLY - 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 | 05-06-2010 |
20100199145 | METHOD AND APPARATUS FOR TURBO ENCODING - An apparatus for encoding an information bit stream using turbo code is provided. The apparatus includes a temporary bit generator for creating a temporary bit stream, an interleaver for independently receiving the information bit stream and the temporary bit stream, a first constituent encoder for independently receiving the information bit stream and the temporary bit stream and generating a first parity bit stream and a second constituent encoder for receiving an output of the interleaver and generating a second parity bit stream. Performance of a turbo code can be enhanced without changing a code rate by making a decoded bit stream longer. | 08-05-2010 |
20100246433 | SCANNING NEIGHBORING BASE STATIONS IN WIRELESS ACCESS SYSTEM - 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. | 09-30-2010 |
20100273483 | METHOD OF COMMUNICATING DATA IN A WIRELESS MOBILE COMMUNICATION SYSTEM - 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. | 10-28-2010 |
20100284297 | SCANNING NEIGHBORING BASE STATIONS IN WIRELESS ACCESS SYSTEM - 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. | 11-11-2010 |
20100309793 | METHOD OF ESTIMATING SIGNAL-TO-NOISE RATIO, METHOD OF ADJUSTING FEEDBACK INFORMATION TRANSMISSION, ADAPTIVE MODULATION AND CODING METHOD USING THE SAME, AND TRANSCEIVER THEREOF - A method of estimating a signal-to-noise ratio by considering user mobility, a method of adjusting feedback information transmission, an adaptive modulation and coding method using the same, and a transceiver thereof are disclosed. The present invention includes measuring a first channel parameter and a second channel parameter using first and second symbols sequentially received, respectively, estimating a channel quality considering a time delay between measurements of the first and second channel parameters using the first and second channel parameters, and transmitting information for the estimated channel quality if a variation of the first and second channel parameters is equal to or greater than a prescribed threshold. Accordingly, the present invention reduces performance degradation and feedback overhead caused by a time delay in channel quality estimation. | 12-09-2010 |
20110009144 | METHOD OF UPDATING CHANNEL INFORMATION BY A MOBILE STATION THAT IS IN POWER SAVING MODE - A method of updating channel information by a mobile station (MS) that is in power saving mode is disclosed. More specifically, the method includes the MS which receives status information of a first channel descriptor and transmission frame information which includes when the first channel descriptor is to be transmitted. Furthermore, the MS compares status information of the first channel descriptor with status information of a second channel descriptor. Here, the second channel descriptor is stored in the MS. Lastly, if the compared status information are different, the MS receives the first channel descriptor according to the transmission frame information. | 01-13-2011 |
20120178446 | 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 ‘10’ when the scan report mode indicates a event-triggered report. | 07-12-2012 |
20120185746 | METHOD AND APPARATUS OF ENCODING AND DECODING DATA USING LOW DENSITY PARITY CHECK CODE IN A WIRELESS COMMUNICATION SYSTEM - A method of encoding data using low density parity check (LDPC) code defined by a m×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×z sub-matrices of which row weights and column weights are ‘0’ or ‘1’. | 07-19-2012 |
20120269079 | 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, 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. | 10-25-2012 |