Mobility

A Complete Multi-Layered Framework for IEEE-802.11e Multi-Hop Ad Hoc Networks

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Executive Summary

Performance of IEEE 802.11 in multi-hop wireless networks depends on the characteristics of the protocol itself, and on those of the other layers. The authors are interested in this paper in modeling the IEEE 802.11e Enhanced Distributed Coordination Function. They investigate the intricate interactions between PHY, MAC and Network layers. For instance, they jointly incorporate the carrier sense threshold, the transmit power, the contention window size, the retransmissions retry limit, the multi rates, the routing protocols and the network topology. Then, they build a general cross-layered framework to represent multi-hop ad hoc networks with asymmetric topology and asymmetric traffic.

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