Cognitive wireless network with cooperative and selfish nodes

In this paper we report on our fundamental results and new work on building cognitive wireless networks that complete resource sharing in a local environment. We emphasize two fundamentals issues. First, a cognitive network with full cooperative nodes. Second, the cooperative and not cooperative behavior of selfish users in our network. The cooperative behavior among the radios is regularly believed to require a rich exchange of information. We show in this work that cooperation can be an emergent phenomenon with a considerable costs. We apply Coalitional Games to cognitive wireless networks to show that coalitional attitude both in sensing and transmission data can give a very good gain. The impacting factors of achievable cooperative gain is mathematically calculated, also incurred cooperation overhead are presented. A simulation proof of the two issues conclude our paper.