Modeling and Characterization of Traffic in Public Safety Wireless Networks
B. Vujicic, N. Cackov, Svetlana Vujičić, Ljiljana Trajković · Summit (Simon Fraser University) · 2006
In this paper, we present statistical analysis of traffic in a deployed circuit-switched, trunked cellular wireless network used by public safety agencies. Prior analysis considered traffic from three busy hours during two days in 2001. Traffic data in this study span various time periods in 2001, 2002, and 2003. We examine the statistical distribution and autocorrelation function of call inter-arrival and call holding times during several busy hours. We find that call interarrival times are long-range dependent and may be modeled by both Weibull and gamma distributions. Call holding times follow the lognormal distribution and are uncorrelated. These findings indicate that traditional Erlang models for voice traffic may not be suitable for evaluating the performance of trunked radio networks. 1.