Abstract
AbstractA distributed medium-access control (MAC) protocol for the time-slotted channel with multi-packet reception (MPR) capability is proposed. In contrast to the commonly assumed collision channel, in the MPR channel with channel capacity K, it is possible to decode up to K packets whose transmissions overlap in time. In order to exploit the MPR capability, the additive-increase multiplicative-decrease MAC (AIMD-MAC) protocol is designed to adaptively adjust the access probabilities of the independent nodes based on their local transmission histories. The examined performance metrics for evaluating this protocol include aggregate throughput, average packet delay and system fairness. Extensive simulations show that the performance of AIMD-MAC is superior to that of S-Aloha* under light traffic loads and achieves the optimum level after the system is saturated. With a suitable parameter set, AIMD-MAC can be adequately applied in a dynamic wireless environment.KeywordsMedium-access control (MAC)multi-packet reception (MPR)additive-increase multiplicative-decrease (AIMD)congestion control
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