cognitive radio based communication system in a hidden way to solve the problem first user

摘要

A method for solving hidden preferred-user problems in a communication system using the cognitive radio technique is provided to prevent the signal interference by establishing a safety area in which a hidden preferred-user is not generated, and then guiding the transmission radius of a CR node inside the safety area. A transmission CR node searches a neighbor node in a safety area(401) and then grasps whether the neighbor node exists in a safety area(402). If the neighbor node does not exist, the transmission CR node connects to a preset common control channel(404) and then establishes a connection with the neighbor node after controlling the transmission radius(405).