A Markov Model of the 802.11 Distributed Coordination Function: Part II -- Stablility Analysis

We propose a queueing model of the 802.11 distributed coordination function in a non-saturated traffic environment, and obtain the characteristic equation of the network throughput in the Part I of this paper series. In the part II, we explore the stable throughput region and the bounded delay region of the retransmission factor based on this model. We find that both regions are highly dependent on the input traffic rate as well as the back off scheduling algorithm. In general, the bounded delay region is a subset of the stable throughput region. The exponential back off algorithm can be stable under certain conditions even if the population is very large.