End-to-end throughput analysis for IEEE 802.11e EDCA string-topology wireless multi-hop networks
<Abstract> This paper proposes analytical expressions of the end-to-end throughput for IEEE 802.11e EDCA wireless string-topology multi-hop networks.For obtaining the IEEE 802.11e EDCA performance, internal collisions between the access categories (ACs) in identical node, frame collisions with external nodes and frame-existence probabilities of buffers at each AC are expressed as function of EDCA access parameters, such as CWmin, CWmax, and AIFSN.Therefore, it is possible to obtain the effects of CW_min, CWmax} and AIFSN to the QoS support in the EDCA.It is possible to obtain the end-to-end throughput at any offered load with respect to each AC because the buffer states can be expressed according to ACs, which accept both saturated and non-saturated operations. The obtained analytical expressions are verified by showing the quantitative agreements of end-to-end throughputs with simulation results. |