Accurate delay distribution for IEEE 802.11 DCF

We derive the access delay generating function of the IEEE 802.11 DCF protocol. Our analysis corrects a model recently presented by O. Tickoo and B. Sikdar (see Proc. IEEE INFOCOM 2004, p.1404-13). We demonstrate that numerical transform inversion can be used to efficiently obtain values of the distribution. Simulations show that our analytical results are highly accurate.