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On the Limits of Spatial Reuse and Cooperative Communication for Dense Wireless Networks

Ramaiyan, Venkatesh and Kumar, Anurag (2007) On the Limits of Spatial Reuse and Cooperative Communication for Dense Wireless Networks. In: Information Theory for Wireless Networks, 2007 IEEE Information Theory Workshop on , 1-6 July 2007 , Solstrand .

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Abstract

We consider a dense ad hoc wireless network comprising n nodes confined to a given two dimensional region of fixed area. For the Gupta-Kumar random traffic model and a realistic interference and path loss model (i.e., the channel power gains are bounded above, and are bounded below by a strictly positive number), we study the scaling of the aggregate end-to-end throughput with respect to the network average power constraint, P macr, and the number of nodes, n. The network power constraint P macr is related to the per node power constraint, P macr, as P macr = np. For large P, we show that the throughput saturates as Theta(log(P macr)), irrespective of the number of nodes in the network. For moderate P, which can accommodate spatial reuse to improve end-to-end throughput, we observe that the amount of spatial reuse feasible in the network is limited by the diameter of the network. In fact, we observe that the end-to-end path loss in the network and the amount of spatial reuse feasible in the network are inversely proportional. This puts a restriction on the gains achievable using the cooperative communication techniques studied in and, as these rely on direct long distance communication over the network.

Item Type: Conference Paper
Additional Information: Copyright 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: Aggregates;Attenuation;Interference constraints;Propagation losses;Scattering;Telecommunication traffic ;Throughput; Traffic control;Transmitters;Wireless networks
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 17 Oct 2011 06:06
Last Modified: 17 Oct 2011 06:06
URI: http://eprints.iisc.ernet.in/id/eprint/41427

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