[Legacy Report] Network Selection for Secondary Users in Cognitive Radio Systems

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Existing studies have demonstrated that uneven and dynamic usage patterns by the primary users of license-based wireless communication systems can often lead to temporal and spatial spectrum underutilization. This provides an opportunity for the secondary users (SUs) to tap into underutilized frequency bands provided that they are capable of cognitively accessing systems without colliding or impacting the performance of the primary users (PUs). When there are multiple networks with spare spectrum, secondary users can opportunistically choose the best network to access, subject to certain constraints. In cognitive radio systems, this is referred as the network selection problem for secondary users.
This talk will present our recent research results on network selection problem. Specifically, model-based and measurement-based solutions are proposed for cognitive network selection, that aim to optimize secondary users throughput and energy-efficiency subject to a target collision probability for the primary users. It has demonstrated that the proposed new approaches achieve better performance than Greedy and Random network selection.

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