Method and apparatus for inter-frame sharing in cognitive radio system

PURPOSE: A method and a device for inter-frame sharing in a cognitive radio system are provided to efficiently use a resource in a wireless environment with a limited spectrum resource by the inter-frame sharing. CONSTITUTION: A random number generator generates a first random number for frame contention. A controller(704) includes the first random number, requests the frame contention in one or more destination base stations, and receives response to the frame contention request from one or more destination base stations. A frame resource arrangement unit(708) occupies one or more requested contention frames when all positive responses to the frame contention request are received from one or more destination base station.