CHANNEL REUSE SCHEME BASED ON THE LOCATION OF PRIMARY USER IN COGNITIVE RADIO SYSTEM

摘要

PURPOSE: A channel reuse method based on a primary user location is provided to control the transmission power and the channel change of a cognitive radio system user. CONSTITUTION: A cognitive radio base station estimates the location of a primary user by the number of cognitive radio system users who detect the channels of priority user(S220). The cognitive radio base station determines whether the use state of the priority user channel based on the estimated location of the primary user(S230). If the primary user is able to reuse the primary user channel, the cognitive radio base station selects a cognitive radio system user considering the amount of interference about the communication of the primary user(S240).