Title:
The Energy-Limited Capacity of Wireless Networks
The Energy-Limited Capacity of Wireless Networks
Author(s)
Ammar, Mostafa H.
Zegura, Ellen W.
Zhao, Wenrui
Zegura, Ellen W.
Zhao, Wenrui
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Abstract
The performance of large-scale wireless ad hoc
networks is often limited by the broadcasting nature of the
wireless medium and the inherent node energy constraints. While
the impact of the former on network capacity has been studied
extensively in the literature, the impact of energy constraints
has not received as much attention. In this paper, we study
the capacity limitations resulting from the energy supplies in
wireless nodes. We define the energy-limited capacity of a wireless
network as the maximum amount of data the network can
deliver before the nodes run out of energy. This energy-limited
capacity is an important parameter in networks where operating
lifetime is critical, such as ad hoc networks deployed in hazardous
environments and sensor networks. We study two types of
static networks, networks without any infrastructure support and
networks where base stations with unlimited energy are deployed
to support data forwarding. We consider two kinds of traffic
models motivated by ad hoc networks and sensor networks. We
derive upper and lower bounds on the energy-limited capacity
of these networks. While throughput has been shown to not
scale with node density in static networks by previous studies,
our results show that, depending on the energy consumption
characteristics of wireless communication, the energy-limited
capacity can scale well under both traffic models. In addition,
we show that the deployment of base stations can improve the
energy-limited capacity of the network, especially for networks
with sensor traffic.
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Date Issued
2004
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353237 bytes
Resource Type
Text
Resource Subtype
Technical Report