Common Control Channel Saturation Detection And Enhancement In Cognitive Radio Networks

摘要

Mac protocol plays an important role in spectrum opportunities utilization, primary user’s interference management and secondary user’s coordination in cognitive radio networks. The Common control channel is one of the most challenging issues in CR networks. This channel is regarded as bottleneck for the network and any threat for it can be assumed as a threat for the whole network. CCC saturation is one of the most important problems, when the number of users in the network is high. In this paper we are going to propose a method to diagnose CCC saturation. After saturation detection MAC decision can select an alternative strategy for user’s coordination. We introduced through CCC access scheme (IEEE 802.11) an analytical model to describe our method. According to this method in CCC saturation situation the network throughput not highly decreased and not huge increasing in transmission delay. So using this method can avoids waste of CR network resources considerably.