Throughput analysis of multiple cognitive radio networks

Deployment of Multiple Cognitive Radio Networks (CRNs) is a very common scenario in today's world, like in the field of defence or disaster management. In this paper, we deal with the case of multiple numbers of co-located CRNs acting as secondary network along with one primary user (PU). We study the node based throughput performance of a CRN in presence of several coexisting CRNs. We generalize the throughput expression for multiple numbers of CRNs and verify it by using our developed simulation test bed. We show the effects of various important parameters, like-spectrum sensing parameters, and transmission probabilities on throughput performance. This study provides a guideline about the maximum number of CRNs which can be deployed so as to maintain a minimum required level of throughput.