| Patent application number | Description | Published |
|---|
| 20080219161 | Method for generating burst in a communication system - A method for generating a burst in a communication system. The method includes estimating a first allocable PDU according to scheduling priority; generating a first burst in which the first PDU is to be included; and determining whether a total size of bursts to be allocated to a downlink subframe including the generated first burst is less than a maximum size of bursts allocable to the downlink subframe. | 09-11-2008 |
| 20080240304 | APPARATUS AND METHOD FOR INTERFERENCE CANCELLATION IN A BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for interference cancellation in a broadband wireless communication system are provided. A receiving apparatus includes an estimator, a channel compensator, and a demodulator. The estimator estimates channels of a desired signal and at least one interference signal, estimates noise, calculates a mean interference power of each interference signal, and calculates a mean noise power. The channel compensator channel-compensates burst data. The demodulator calculates a noise variance value by adding the mean noise power to the at least one mean interference power and creates Log Likelihood Ratio (LLR) by demodulating the channel-compensated data. | 10-02-2008 |
| 20080240308 | APPARATUS AND METHOD FOR ESTIMATING CHANNEL USING SLIDING WINDOWS IN A BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for estimating a channel using sliding windows in a broadband wireless communication system are provided. The apparatus includes an estimator, a first calculator, a second calculator, and a third calculator. The estimator estimates a speed of travel. The first calculator calculates a time correlation values using the estimated speed. The second calculator calculates weight factors using the time correlation values. The third calculator calculates a channel estimation value by multiplying corresponding pilot symbols by the weight factors and equalizing the pilot symbols. | 10-02-2008 |
| 20090074047 | APPARATUS AND METHOD FOR ESTIMATING SIGNAL TO INTERFERENCE AND NOISE RATIO IN A WIRELESS COMMUNICATION SYSTEM - An apparatus and method for estimating a Signal to Interference plus Noise Ratio (SINR) in a wireless communication system are provided. The method includes processing a received signal by Orthogonal Frequency Division Multiplexing (OFDM) demodulation to convert the received signal into frequency-domain data, selecting ranging data from the frequency-domain data, multiplying the selected ranging data by a ranging code to perform code demodulation, calculating at least one norm value and at least one coherent norm value by bundle for the code-demodulated data and estimating an SINR using the calculated at least one norm value and at least one coherent norm value. | 03-19-2009 |
| 20090213803 | Apparatus and method for estimating size of map message in broadband wireless communication - A resource allocation method of a Base Station (BS) in a wireless communication system is provided. The method includes estimating a size of a MAP message, and evaluating a size of an available burst allocation region according to the estimated size of the MAP message and allocating bursts in the evaluated-sized burst allocation region. Accordingly, when a DownLink (DL) subframe is used by being divining into a plurality of regions according to a burst characteristic, a throughput can be improved without waste of resources by estimating a resource amount occupied by a MAP message in the DL subframe. | 08-27-2009 |
| 20090213807 | Apparatus and method for allocating downlink burst in broadband wireless communication system - A method of allocating bursts in a broadband wireless communication system is provided. The method includes dividing a downlink period into a plurality of regions according to a burst property, calculating a residual symbol axis size and a residual subchannel axis size of a first region conforming to two-dimensional allocation among the plurality of regions, allocating bursts to be allocated to the first region in a descending order, wherein the bursts are respectively allocated in a rectangular shape having a length corresponding to the number of residual symbols along a time axis or in a rectangular shape having a length corresponding to the number of residual subchannels along a frequency axis, and allocating bursts to be allocated to at least one region conforming to one-dimensional allocation among the plurality of regions to the at least one region conforming to one-dimensional allocation according to a scheduling priority. | 08-27-2009 |
| 20090221282 | APPARATUS AND METHOD FOR MEASURING CHANNEL QUALITY BY USING RANGING SIGNAL IN BROADBAND WIRELESS COMMUNICATION SYSTEM - A method for measuring channel quality of a Base Station (BS) by using a ranging signal in a broadband wireless communication system is provided. The method includes estimating a time offset of the ranging signal received through a ranging channel, measuring channel quality by using the ranging signal including the time offset, determining whether distortion occurs in the measured channel quality by using the time offset, and compensating for distortion of the measured channel quality. | 09-03-2009 |
| 20100182952 | RRC message transmission method in wireless communication system - A Radio Resource Control (RRC) message transmission method and apparatus for a wireless communication system operating in TTI and acknowledge mode is configured to reduce interruption time by minimizing retransmission times of RRC message. The message transmission method for a wireless communication system includes generating, at a transmitter, a message; transmitting the message two or more times consecutively from the transmitter to a receiver; analyzing, at a receiver, the message transmitted by the transmitter; transmitting an acknowledge message or a negative-acknowledge from the receiver to the transmitter depending on the analysis result; and terminating, at the transmitter, a retransmission process of the message upon receipt of the acknowledgement message. | 07-22-2010 |
| 20100202395 | APPARATUS AND METHOD FOR ESTIMATING MAP SIZE IN A BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for estimating a MAP size in a broadband wireless communication system based on FFR are provided. In the method, one of a plurality of connections is selected according to priority between the connections. An available resource condition and a MAP size for allocation of resources for the selected connection is determined if resources acceptable for a burst are present in a zone including the selected connection. The next connection is selected according to the priority if available resources are present. The determined MAP size is determined as the final estimation value of a MAP size if the available resources are not present. | 08-12-2010 |
| 20100208717 | Apparatus and method for supporting frequency rearrangement in wireless communication system - A base station includes a center frequency setting unit, a local oscillator, a baseband processor, and an RF processor. In the event of a frequency band change, the center frequency setting unit sets a center frequency of a use frequency channel to have a predetermined offset value with respect to a center frequency before the frequency band change. The local oscillator generates an LO frequency signal according to the center frequency set by the center frequency setting unit. The baseband processor generates a downlink baseband signal. The RF processor uses the LO frequency signal to convert the downlink baseband signal into an RF signal prior to transmission. | 08-19-2010 |
| 20100331036 | UPLINK (UL) POWER CONTROL APPARATUS AND METHOD IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An uplink (UL) power control apparatus and method in a broadband wireless communication system are provided. The Mobile Station (MS) includes a power controller for calculating a power compensation value using a last transmit power in a previous closed loop power control when a power control mode is changed to an open loop power control, and determining a transmit power according to the open loop power control using the power compensation value; and a transmitter for adjusting and transmitting the transmit power of a UL signal under control of the power controller. | 12-30-2010 |
| 20110149716 | APPARATUS AND METHOD FOR TRANSMITTING A SUB-CHANNEL SIGNAL IN A COMMUNICATION SYSTEM USING AN ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS SCHEME - Methods of transmitting an receiving symbols by a Mobile Subscriber Station (MSS) and a Base Station (BS) are provided. The method for receiving symbols by the MSS includes receiving symbols from the BS, wherein the symbols are mapped onto data sub-carriers using a sequence, wherein the sequence includes result values, the result values being generated by applying, to a basic sequence, an offset and a number of cyclic shifting, the basic sequence having a length identical to the number of data sub-carriers. The method for transmitting symbols by the MSS includes transmitting symbols to the BS, wherein the symbols are mapped onto data sub-carriers using a sequence, wherein the sequence includes result values, the result values being generated by applying, to a basic sequence, an offset and a number of cyclic shifting, the basic sequence having a length identical to the number of data sub-carriers. | 06-23-2011 |
| 20110158123 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING CHANNEL QUALITY INFORMATION IN A COMMUNICATION SYSTEM USING AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SCHEME - A method and Mobile Subscriber Station (MSS) are provided for transmitting Channel Quality Information (CQI) in a wireless communication system using an Orthogonal Frequency Division Multiple Access (OFDMA) scheme. A Carrier to Interference and Noise Ratio (CINR) of at least two bands are measured; each of the at least two bands including a plurality of adjacent subcarriers for a band Adaptive Modulation and Coding (AMC) operation. A Report Response (REP-RSP) message including first information related to the measured CINR is sent. Second information related to a differential CINR of the at least two bands is sent via a Channel Quality Information Channel (CQICH). | 06-30-2011 |
