method for flexible bandwidth OFDMA-based Cognitive Radio System using flexible bandwidth, the base station and subscriber station using the same

摘要

In the present invention, how to use a flexible bandwidth in an orthogonal frequency division multiple access-based cognitive radio system, relates to a base station and a terminal using the same, in the base station channel band that is not used, bandwidth, resolution - the bandwidth resolution broadcast channel smaller than a predetermined bandwidth, the bandwidth of the band-glucose tolerance band having a bandwidth of a channel to be natural number times of the band allocated to the terminal; And a sending unit for sending the OFDMA-based signal including the bandwidth allocation information indicating the information on the assigned channel band. According to the present invention can effectively utilize the unused band is available for the bundle of the band pieces and piece band, the flexibility to use the transmission rate (data rate). ; Cognitive radio, WRAN, OFDMA, flexible bandwidth usage, fractional bandwidth, channel bonding, channel aggregation