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Primary user activity pbkp_rediction based joint topology control and stable routing in mobile cognitive networks

Abstract:

The stability of links in mobile cognitive networks (MCNets) is significantly affected by primary user activities and node mobility, which makes topology control and stable routing more challenging than that in traditional wireless networks. In multi-channel multi-hop MCNets, it will become worse. In this paper, we propose a primary user activity pbkp_rediction model to reveal channel utilization patterns of primary users. Next, we put forward a novel routing metric Primary user activity Pbkp_rediction based Stability Metric (PPSM) to quantitatively capture the affect of primary user activities and node mobility. Finally, we propose and implement a Primary user activity Pbkp_rediction based Joint Topology Control and Stable Routing (PP-JTCSR) protocol for maximizing network throughput based on our primary user activity pbkp_rediction model, which can find out the most stable and the shortest path between a source and a destination. NS2-based simulation results demonstrate that our PP-JTCSR protocol can generate stable topology through pbkp_redicting link and path duration quantitatively, and outperforms related proposals in terms of path stability and average throughput.