Spectrum-aware Distributed Channel Assignment for Cognitive Radio Wireless Mesh Networks

Malaysian Journal of Computer Science

Muhammad Shiraz¹  Ejaz Ahmed¹  Abdullah Gani¹ 

关键词: Cognitive Radio Networks;    Channel Assignment;    Dynamic Spectrum Access;    Wireless Mesh Networks;   

DOI  :  

学科分类：社会科学、人文和艺术（综合）

来源: University of Malaya * Faculty of Computer Science and Information Technology

【 摘 要 】

In Cognitive Radio Networks, the application throughput is not only affected by primary user activity but alsoby numerous environment factors such as interference. Therefore, channel assignment for cognitive radionetworks should not only consider channel idle time but also an error rate perceived on the channel. Thespectrum-aware channel assignment is vital to efficiently utilize the network resources. In this paper, wepropose Spectrum-aware Channel Assignment (SaCA) algorithm for multi-radio, multi-channel cognitive radionetworks. We have simulated our proposed algorithm in OMNeT++, an open source discrete event simulator,and compare its performance with the spectrum-unaware channel assignment (SuCA) algorithm. Theperformance of channel assignment is evaluated for packet delivery ratio and number of channel switches byvarying the number of primary users, number of channels and primary user activity ratio. The performance ofSaCA is better for large number of channels, primary users and higher primary user activity ratio in thenetwork. In comparison with SaCA, average packet delivery ratio more sharply decreases with increase innumber of primary users for SuCA.

【 授权许可】

Unknown