Adaptive packet reservation multiple access protocol for fixed wireless communications

Packet reservation multiple access (PRMA) protocol is an adaptation of the Reservation ALOHA protocol to the wireless environment. In this paper, a new modified version of the PRMA protocol called PRMA with adaptive permission probability is proposed, which represents a natural enhancement of PRMA. Unlike traditional PRMA, this proposed protocol allows adaptive permission probability to take place based on the instantaneous traffic loads in the system and slot availability provided by the base station. Therefore, instead of relying on a predefined permission probability to access the first available slot, each contending wireless terminal randomly selects an available slot to use from the current pool of idle slots based on an adaptive permission probability. The simulation results presented show quantitative improvements in the performance of proposed protocol with respect to the performance of traditional PRMA and PRMA with random contention.

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