Analytical expression for throughput and transmission delay of IEEE 802.11 string topology networks with two-way flows <Abstract> This paper presents generalized analytical expressions for throughput and transmission delay of IEEE 802.11 string-topology multi-hop networks. The analytical expressions obtained in this paper give throughput and end-to-end delay at any hop number, and any offered load by taking into account Markov-chain model for two-way flow, and queuing theory over MAC-layer frame-collision probability. The analytical expressions are verified by comparisons with simulation results. |