A Capacity Analysis for the IEEE 802.11 MAC Protocol (2001)
| Venue: | In Wireless Networks |
| Citations: | 17 - 0 self |
BibTeX
@ARTICLE{Tay01acapacity,
author = {Y. C. Tay and K. C. Chua},
title = {A Capacity Analysis for the IEEE 802.11 MAC Protocol},
journal = {In Wireless Networks},
year = {2001},
volume = {7},
pages = {159--171}
}
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Abstract
The recently proposed IEEE 802.11 MAC protocol provides shared access to a wireless channel. This paper uses an analytic model to study the channel capacity --- i.e. maximum throughput --- when using the basic access (two-way handshaking) method in this protocol. It provides closed-form approximations for (1) the probability of collision p, (2) the maximum throughput S and (3) the limit on the number of stations in a wireless cell. The analysis also shows that (4) p does not depend on the packet length, the latency in crossing the MAC and physical layers, the acknowledgement timeout, the interframe spaces and the slot size; (5) p and S (and other performance measures) depend on the minimum window size W and the number of stations n only through a variable g = W=(n+ 1) --- consequently, halving W is like doubling n; (6) the maximum contention window size has minimal effect on p and S; (7) the choice of W that maximizes S is proportional to the square root of the packet length; (8) S ...
