Title:
Trading Latency for Energy in Wireless Ad Hoc Networks using Message Ferrying
Trading Latency for Energy in Wireless Ad Hoc Networks using Message Ferrying
Author(s)
Zhao, Wenrui
Ammar, Mostafa H.
Zegura, Ellen W.
Lee, Chungki
Jun, Hyewon
Ammar, Mostafa H.
Zegura, Ellen W.
Lee, Chungki
Jun, Hyewon
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Abstract
Power management is a critical issue in wireless ad hoc
networks where the energy supply is limited. In this paper,
we investigate a routing paradigm, Message Ferrying (MF), to
save energy while trading off data delivery delay. In MF, special
nodes called ferries move around the deployment area to deliver
messages for nodes. The reliance on the movement of ferries to
deliver data increases the delivery delay. However, nodes can save
energy by disabling their radios when ferries are far away. To
exploit this feature, we present a power management framework,
in which nodes switch their power management modes based on
the knowledge of ferry location. We evaluate the performance of
our scheme using ns-2 simulations and compare it with Dynamic
Source Routing (DSR). Our simulation results show that MF
achieves energy savings as high as 95%
compared to DSR without
power management and still delivers more than 98%
of data. In
contrast, a power-managed DSR delivers much less data than
MF to achieve similar energy savings. In the scenario of heavy
traffic load, the power-managed DSR delivers less than 20%
of
data. MF also shows robust performance for highly mobile nodes,
while the performance of DSR suffers significantly. Thus, delay
tolerant applications should use MF rather than a multihop
routing protocol to save energy efficiently when both routing
approaches are available.
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Date Issued
2004
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179220 bytes
Resource Type
Text
Resource Subtype
Technical Report