DSA COGNITIVE RADIO NETWORK SYSTEM AND CHANNEL INFORMATION EXCHANGE METHOD THROUGH THE SAME

摘要

The present invention relates to a DSA cognitive wireless network system and a channel information exchanging method therethrough, wherein the system sets a cluster-based common channel for communications between secondary user terminals in a dynamic spectrum allocation (DSA) cognitive wireless network system, and transmit data through a corresponding set common channel. To this end, the channel information exchanging method which sets the common channel with a cluster head and a plurality of cluster nodes included in the DSA cognitive wireless network system comprises the steps of: transmitting a common channel setting request message and a common channel report confirmation message, through the cluster head; transmitting a common channel setting response message to the cluster head, in response to the common channel setting request message, through the cluster node; and, when a channel use is impossible due to a detection or an interference by a main user while exchanging the channel information, reconstituting the channel information exchange process, through the cluster head.