抽象的

Modeling and Analysis of Sensing Schemes in Multichannel Cognitive Radio Networks

P. Jaya Rengaleela, G. Pandeeswari

The current spectrum allocation policy adopted by communication agencies around the globe mandates for the static licensing of the available spectrum to various technologies and organizations. This non overlapping part of the spectrum reduces interference and guarantees exclusive spectrum use of licensed users. However, nearly all useful spectrum is now allocated to different entities, without provision for accommodating new wireless technologies. More specifically, a model for the single user case is introduced and its performance is validated through analytical analysis. Since the scheme utilized experiences a high level of collision among the seas, to overcome the problem appropriately, p-persistent random access (PPRA) protocol is considered, which offers higher average throughput for SUs by statistically distributing their loads among all channels. The structure and performance of the proposed schemes are discussed in detail, and compare the performance of the proposed sense access strategies.