Sensing After Transmission in Cognitive Wireless Personal Area Networks

In this paper we investigate the performance of a cognitive personal area network (CPAN) in which the duration of spectrum sensing done by a node is proportional to the number of packets previously transmitted by that node. We show that the operation of a node in this setup can be modeled as a gated exhaustive round-robin system with vacations, and analyze the performance of the system. The impact of the value of the penalty factor, which determines the duration of sensing activity with respect to transmission, on packet access delay is discussed in detail.