Throughput and Delay Analysis for IEEE 802.11 Multi-hop Networks Considering Data Rate <Abstract> In an IEEE 802.11 Distributed Coordination Function (DCF)-based wireless network with multiple hops, a node operates on its own with several predefined data rates (i.e., following modulation and coding schemes). Moreover, the IEEE 802.11 DCF nodefs communication is characterized by transmission and carrier-sensing distances. The transmission one is, in general, reverse proportional to the data rate. Meanwhile, the carrier distance keeps constant regardless of the modulation and coding scheme. Therefore, when a node has a high transmission rate, within its carrier- sensing range, the number of nodes may increase. The previous works have not yet extensively investigated the impact of data rates on such a scenario. This paper addresses that issue aiming to quantify the network performance of the multi-hop IEEE 802.11 networks. As a solution, we propose the mathematical expressions, which consider data rates, for end -to-end throughputs, as well as delays in the network with string topology. We confirm the expressionsf correctness by presenting the quantitative agreements between the analytical and simulation results. |