Delay analysis for IEEE802.11 multi-hop networks taking into account the
concurrent-transmission collisions <Abstract> This paper presents analytical expressions of throughput, collision probability, frame existence probability, and end-to-end delay for the IEEE 802.11 Distributed Coordination Function (DCF) protocol in wireless multi-hop networks with one-way flow under unsaturated traffic loads. The hidden-node collisions and concurrent-transmission collisions are considered in this paper. First, analytical expressions of transmission airtime, collision probability, throughput and frame existence probability are derived. By using these expressions and buffer-state transition model, analytical expressions of end-to-end delay can be obtained. The validities of the analytical expressions are confirmed from the quantitative agreements between the analytical and simulation results. |