Mobility

Scheduling in Mobile Wireless Networks With Topology and Channel-State Uncertainty

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Executive Summary

The authors study throughput-optimal scheduling/routing over mobile ad-hoc networks with time-varying (fading) channels. Traditional back-pressure algorithms (based on the work by Tassiulas and Ephremides) require instantaneous network state (topology, queues-lengths, and fading channel-state) in order to make scheduling/routing decisions. However, such instantaneous network-wide (global) information is hard to come by in practice, especially when mobility induces a time-varying topology. With information delays and a lack of global network state, different mobile nodes have differing "Views" of the network, thus inducing uncertainty and inconsistency across mobile nodes in their topology knowledge and network state information.

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