On the Optimization of the IEEE 802.11 DCF: A Cross-Layer Perspective

Figure 2

Throughput for the 2-way mechanism as a function of the packet rate 𝜆, for 𝑁=10, 𝑚=5, packet size 𝐸[PL]=2312 bytes, and different values of 𝑃_𝑒 and 𝑊₀ as noticed in the respective legends. Continuous straight lines refer to the linear model of the throughput 𝑆(𝜆)=𝑁⋅𝐸[PL]⋅𝜆 derived in (9), while the horizontal line corresponds to 𝑆_𝑚 noticed in (13). Dashed lines, labeled Thr, refer to the theoretical throughput in (7), while dash-dotted lines labeled NS2 identify the simulation results obtained with ns-2.

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