Computer Science – Information Theory
Scientific paper
2006-05-22
Proceedings of the 2006 IEEE International Symposium on Information Theory (ISIT 2006), The Westin Seattle, Seattle, WA, pp.
Computer Science
Information Theory
Proceedings of the 2006 IEEE International Symposium on Information Theory (ISIT 2006), The Westin Seattle, Seattle, Washingto
Scientific paper
10.1109/ISIT.2006.261639
In this paper, we derive the capacity of a special class of mesh networks. A mesh network is defined as a heterogeneous wireless network in which the transmission among power limited nodes is assisted by powerful relays, which use the same wireless medium. We find the capacity of the mesh network when there is one source, one destination, and multiple relays. We call this channel the single source multiple relay single destination (SSMRSD) mesh network. Our approach is as follows. We first look at an upper bound on the information theoretic capacity of these networks in the Gaussian setting. We then show that the bound is achievable asymptotically using the compress-forward strategy for the multiple relay channel. Theoretically, the results indicate the value of cooperation and the utility of carefully deployed relays in wireless ad-hoc and sensor networks. The capacity characterization quantifies how the relays can be used to either conserve node energy or to increase transmission rate.
Motani Mehul
Ong Lawrence
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