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Simulation of Slotted, Controlled and Heirarchical Alohas

In this paper a simulation tool is presented for characterization of Slotted and Controlled Alohas. The tool will be useful in obtaining throughput versus load, delay versus throughput and backlog versus throughput characteristics. A new scheme, Hierarchical Aloha is proposed and its performance is found to be superior to the Slotted Aloha.