Performance　Analysis　of　Slotted　Multichannel　ALOHA　Systems　with　Capture　in　Microcellular　Environments

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Multichannel ALOHA protocol is a generalization of the single channel one and is believed to be a good candidate for the data protocol in hybrid voice/data microcellular systems.In this paper,results of investigations on the performance of a multichannel ALOHA system in the microcellular environment are presented,accounting for channel impairments,the spatial distribution of mobile users,and the capture effect.A Markovian model is established,several performance measures are defined,and an iterative method is proposed to evaluate the system performance numerically.The stability of this multicell,multichannel ALOHA system is also studied,using the total delay as the criterion.