Abstract
Two distributed reservation control protocols are described, analyzed, and simulated for the transmission of datagramtype messages, encoded into fixed length packets, over a synchronous communication satellite channel. These protocols are of a hybrid form between pure random access contention protocols of the ALOHA variety and reservation control protocols such as CPODA. Simulations have shown that certain versions of these protocols can support throughput rates in excess of 97 percent of the channel capacity, maintain stability even under overload conditions, and incur waiting time delays ranging from 0.5 s under light traffic load to 0.88 s for saturated traffic conditions.

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