Performance analysis of secondary networks with multiple primary users for spectrum database system

Abstract

This paper presents the performance evaluation for secondary networks with multiple primary users (PU) with a stochastic geometry approach. On the assumption that the secondary users (SU) follow a Poisson hole process, we derive a PU's outage probability (OP) and SU's area spectral efficiency (ASE), where the PU's OP and SU's ASE are defined as the probability that the aggregate interference at a PU from transmitting SUs exceeds a threshold and the product of the transmitting SU's density and the SU's average throughput, respectively. The theoretical results agree with the simulation results, and these results show that both the PU's OP and SU's ASE decrease along with the primary exclusive region (PER) size, i.e., we quantitatively evaluate the trade-off between the PU's OP and SU's ASE.