In this paper, we consider the joint optimal sensing ...

In this paper, we consider the joint optimal sensing

and distributed MAC protocol design for cognitive radio

networks. Specifically, we design a synchronized MAC protocol

for dynamic spectrum sharing among multiple secondary

users, which incorporates spectrum sensing for protecting active

primary users. We perform saturation throughput analysis for

the proposed MAC protocol that explicitly captures spectrum

sensing performance. Then, we find its optimal configuration

by formulating a throughput maximization problem subject to

detection probability constraints for primary users. In particular,

the optimal solution of this optimization problem returns the

required sensing time for primary users’ protection and optimal

contention window for maximizing total throughput of the

secondary network. Finally, numerical results are presented to

illustrate a significant performance gain of the optimal sensing

and protocol configuration.

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