| Patent application number | Description | Published |
|---|
| 20080198944 | POWER TRANSMISSION APPARATUS IN WIRELESS COMMUNICATION SYSTEMS - An envelope elimination and restoration power transmission apparatus in a wireless communication system is provided. The apparatus comprises a signal processor for dividing a transmission signal into a size component and a phase component and for generating a control signal for controlling a current of a bias modulator according to the size component, the bias modulator for amplifying the size component according to the control signal supplied from the signal processor, for lowering an impedance characteristic of the amplified size component and for outputting the amplified size component, a frequency modulator for modulating the phase component into a radio frequency (RF) signal, and a power amplifier for amplifying the RF signal by using an output signal of the bias modulator as a bias voltage. As provided, the transmission apparatus reduces a memory effect due to an impedance difference in a modulation frequency band. | 08-21-2008 |
| 20080253325 | APPARATUS AND METHOD FOR UPLINK BANDWIDTH REQUEST IN BROADBAND WIRELESS ACCESS SYSTEM - An UpLink (UL) bandwidth requesting apparatus and method in a broadband wireless access system are provided. The apparatus includes a queue length controller for determining an amount of bandwidth-request using a difference between a current queue length and a target length and a determiner for the final amount of bandwidth-request using a change rate of queue length for sending information of the calculated bandwidth-request amount to a bandwidth allocating apparatus. By rapidly and accurately predicting the bandwidth-request and reducing the request delay, Quality of Service (QoS) can be guaranteed using a minimum bandwidth. | 10-16-2008 |
| 20090010165 | APPARATUS AND METHOD FOR LIMITING PACKET TRANSMISSION RATE IN COMMUNICATION SYSTEM - In a communication system, a token manager corresponding to a generated or arriving packet is determined, tokens corresponding to a target transmission rate limit are generated, and a corresponding packet is at least one of dropped and provided in consideration of the amount of the tokens created and the size of the generated packet. Through such a method, a packet transmission rate can be limited to the target transmission rate. In addition, when there is traffic of various service classes, service can be differentially provided according to the priorities of the service classes. | 01-08-2009 |
| 20090117902 | Apparatus and method for traffic forwarding in a wireless communication system - An apparatus and method for data transmission in a base station (BS) of a wireless communication system are provided, storing data to be transmitted to a mobile station which performing handover to a target base station; confirming a quantity of stored data; determining whether to transmit the stored data to the target based at least partly on the confirmed quantity of the stored data; transmitting the stored data to the target base station when the base station determines to transmit the stored data to the target base station. | 05-07-2009 |
| 20090187498 | Apparatus and method for performing accounting in wireless communication system - An apparatus and method for processing accounting in a wireless communication system are provided. The method includes creating an accounting data base (DB) for a mobile station (MS), determining whether a state transition of the MS occurs, if the state transition of the MS occurs, updating state information in the accounting DB, and transmitting the accounting information including the state information to an accounting server. | 07-23-2009 |
| 20100182900 | APPARATUS AND METHOD FOR REUSING BASE STATION IDENTIFIER IN A BROADBAND WIRELESS COMMUNICATION SYSTEM - Use of Base Station IDentifier (BSID) in a wireless communication system is provided. Operations of a control station which controls a Base Station (BS) includes, when receiving a handover request message that includes a special BSID allocated for reuse as a target BSID, from other control station, sending a handover response message to the other control station; when receiving a handover complete message from a lower BS, determining whether the lower BS uses the special BSID; and sending a handover complete message comprising the special BSID to the other control station. | 07-22-2010 |
| 20110090871 | METHOD AND APPARATUS FOR COMPENSATING QOS DURING HANDOVER BY BASE STATION IN WIRELESS BROADBAND ACCESS SYSTEM - An apparatus and method for compensating Quality of Service (QoS) during a handover of a Mobile Station (MS) by a serving Base Station (BS) and a target BS in a wireless broadband access system are provided. The method includes generating a message during a handover from the serving BS to a target BS, the message including at least one of a data transmission/reception time just before the handover, a size of a time window for which a data transmission/reception history is recorded in an accumulated way, and an amount of data transmitted/received during the time window, and transmitting the message to the target BS. The target BS can more accurately find a handover break time and the amount of data transmission/reception in the serving BS at the time the MS has been handed over to the target BS, enabling fast and adequate QoS compensation/correction for each QoS class, and thus facilitating flexible, efficient and accurate QoS provisioning regardless of controlled handover and uncontrolled handover. | 04-21-2011 |
