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Hence, the system utilization is a time and space distribution of the number of concurrent calls. To determine the traffic load variations, the authors analyze activity data from sample weeks in 2002 and 2003. They simulate the network by using the OPNET simulation tool and a newly developed network simulator named WarnSim. Simulation models are based on the collected activity data and are used to evaluate the utilization of system resources and to locate network bottlenecks.<\/jats:p>","DOI":"10.1177\/0037549705060238","type":"journal-article","created":{"date-parts":[[2005,11,30]],"date-time":"2005-11-30T05:57:39Z","timestamp":1133330259000},"page":"571-585","source":"Crossref","is-referenced-by-count":7,"title":["Simulation and Performance Evaluation of a Public Safety Wireless Network:                 Case Study"],"prefix":"10.1177","volume":"81","author":[{"given":"N.","family":"Cackov","sequence":"first","affiliation":[{"name":"Simon Fraser University, Vancouver, British Columbia, Canada,"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.","family":"Song","sequence":"additional","affiliation":[{"name":"Simon Fraser University, Vancouver, British Columbia, Canada,"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"B.","family":"Vuji\u010dci\u0107","sequence":"additional","affiliation":[{"name":"Simon Fraser University, Vancouver, British Columbia, Canada,"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S.","family":"Vuji\u010dci\u0107","sequence":"additional","affiliation":[{"name":"Simon Fraser University, Vancouver, British Columbia, Canada,"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"L.","family":"Trajkovi\u0107","sequence":"additional","affiliation":[{"name":"Simon Fraser University, Vancouver, British Columbia, Canada,"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2005,8,1]]},"reference":[{"key":"atypb1","first-page":"781","volume-title":"In Proceedings Workshop on WLN 2002","author":"Andriantiatsaholiniaina, L. 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