Abstract:
The present invention relates to a wireless communication system and, more specifically, to a method for effectively managing resources through reserve resource allocation in the wireless communication system including a relay station. According to the present invention, transmission delay is remarkably reduced by executing effective HARQ retransmission in the relay station based on the reserve resource. Specially, a separate relay station has simple functions in comparison with the relay station of a system which selects a decentralized resource allocation method. The system has the same performance in transmission delay as the system, which selects the decentralized resource allocation method.
Abstract:
PURPOSE: A method for automatically changing a frequency based on spectrum scan is provided to maintain an optimal communication quality by automatically changing an operating frequency into an optimal frequency. CONSTITUTION: A spectrum scan process using a spectrum scan method is performed(S310). Reception noise characteristics about total bandwidths are analyzed based on a signal level(S320). A deposit frequency table is generated according to the superiority of noise characteristics(S330). The deposit frequency table of the other party and the generated deposit frequency table are mutually exchanged(S340). A BER(Bit Error Rate)/RSSI(Received Signal Strength Indicator) of a frequency which is currently in operation are analyzed(S350). Frequency change is determined from the analyzed result of the BER/RSSI according to jamming or an interference status(S360). A frequency change process is performed(S370).