Institute of Electrical & Electronic Engineers
The heavy tailed nature exhibited in both primary and secondary users' traffic fundamentally challenges the performance limit of Dynamic Spectrum Access (DSA) networks under the conventional light tailed assumptions. This paper provides an asymptotic analysis of the steady-state queue length distribution of Secondary Users (SUs) under the heavy tailed network environment. Specifically, two network scenarios are investigated. In the first scenario where each SU has its exclusive access to a Primary User (PU) channel, it is shown that the heavy tailed nature of either the PU traffic or the SU traffic can make SUs experience heavy tailed queue length with unbounded moments.