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In this paper, an analytical traffic model with gamma inter-arrival time and general service time distributions is developed to evaluate the system performance, in terms of the blocking probabilities, in cellular wireless networks. The performance is evaluated with guard channels and compared with that obtained from classical Erlang model.IN a typical cellular wireless environment; broadly two types of calls are originated. Fresh or new calls are originated from the Mobile Hosts (MH) within service area of a base station. Whereas handoff calls are generated when an MH move to the adjacent base station during an on-going call.
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