Performance analysis of the Statistical Priority-Based Multiple Access

Statistical Priority-based Multiple Access (SPMA) is the MAC protocol used for Tactical Targeting Network Technology(TTNT), the next generation of Data Link System of the US Army. As a new MAC protocol on testing and to be used in the near future, SPMA is required to support for multiple different Classes of Services(COS), provide a much lower latency for packets with high priority and an extremely high first transmission success rate for all packets sent out. All these properties make SPMA a much better protocol for Aeronautical Ad-hoc Network(AANET) than others. In this paper we propose a simple but accurate analytical model to compute the Slot Transmission Probability(STP) in assumption of saturated input. With the STP, we get the mean delay, packet loss rate, throughput and other properties of the system. Simulation implemented support the accuracy of the analytical model. All results show that SPMA can guarantee the timeliness and reliability of the highest priority and maintain the stability of the system throughput.