Method and apparatus for communicating of distributed network system in a cognitive radio technique

The present invention relates to a communication method and apparatus in a distributed network system is CR to correct the problem of hidden such authorization system (Hidden Incumbent System) that is expected in the CR communication environment applied. The present invention includes the steps of, transmitting side, one or more neighboring nodes adjacent to the source node, the peripheral channel information of one said using a pulse signal or more neighboring nodes, the source node side according to the request of the source node, the destination node depending on the request, the side of one or more neighboring nodes adjacent to the destination node, in accordance with a peripheral channel information of the at least one neighbor node by using the pulse signal, the phase and the transmission received around the channel information to be transmitted to the destination node side and it provides a channel that is not currently used, the source node and a communication method in a distributed network system is CR which comprises the step of using a data channel is applied for exchanging data between the destination node. Accordingly, the present invention solve the problem of hidden permission system, there is an effect that can be selected in a more rapid and accurate empty channel environment in the CR. CR (Cognitive Radio), a source node, a destination node,