Delay Analysis and Optimality of Scheduling Policies for Multi-Hop Wireless Networks

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In this paper, the authors analyze the delay performance of a multi-hop wireless network in which the routes between source-destination pairs are fixed. They develop a new queue grouping technique to handle the complex correlations of the service process resulting from the multi-hop nature of the flows and their mutual sharing of the wireless medium. A general set-based interference model is assumed that imposes constraints on links that can be served simultaneously at any given time. These interference constraints are used to obtain a fundamental lower bound on the delay performance of any scheduling policy for the system.