A Mathematical Modeling Method of Multiple Access Protocol in TTNT

This paper elaborates the research background and performance parameters of the TTNT(Tactical Targeting Network Technology), points out that the core mechanism of TTNT is SPMA(Statistical Priority-based Multiple Access) protocol, and expounds the working mechanism of SPMA multiple access protocol. Aiming at the problem of SPMA channel access performance, an innovative analysis method of time slot transmission probability based on preemptive M/G/1 queue is proposed. The equation of time slot transmission probability is deduced through mathematical modeling, and the fixed-point method is used to calculate the time slot transmission probability under given system parameters. The numerical solutions of time slot transmission probability under different backoff modes and different number of nodes are analyzed in detail. The simulation shows that the backoff mode has little effect on the time slot transmission probability, and the time slot transmission probability is mainly affected by the number of nodes. The time slot transmission probability equation provides a theoretical basis for the analysis of key parameters and their correlation of SPMA protocol, and supports the subsequent research on the working mechanism of SPMA protocol.