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

Algorithm 1

Optimization algorithm accomplished by every contending station.

(1) do

(2)   Estimation of PER and N

(3)   Evaluate 𝜆_𝑐 from  (14)

(4) while  (IDLE)

(5) // Request to Send from Upper Layers:

(6) if (𝜆>𝜆_𝑐)

(7)      // Link Capacity Operating Region:

(8)  The station evaluates 𝑊_opt from  (17)

(9) else

(10)  // Below Link Capacity Operating Region:

(11)  compute 𝐸[PL]^∗₁ given 𝜆_𝑐

(12)  compute 𝐸[PL]^∗₂ given 𝑃_𝑒

(13)  select 𝐸[PL]_opt=min(𝐸[PL]^∗₁, 𝐸[PL]^∗₂,PL_max)

(14) end

(15) send packet