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Erschienen in:
2009 | OriginalPaper | Buchkapitel
Minimum Energy Broadcast Routing in Ad Hoc and Sensor Networks with Directional Antennas
verfasst von : Zheng Li, Deying Li
Erschienen in: Combinatorial Optimization and Applications
Verlag: Springer Berlin Heidelberg
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In this paper we discuss minimum energy broadcast routing with directional antennas in ad hoc and sensor networks. We assume that the network consists of sensor nodes whose antennas are
Switched beam
directional antennas. The problem of our concern is: given a set
V
with
n
nodes and each node
v
i
has
l
(
i
) transmission
directions
(i.e. the antenna sectors) and a broadcast request sourced at
s
, how to find a broadcast tree rooted at
s
and spanning all nodes in
V
such that the total energy is minimized. This problem involves with the choice of transmitting nodes and their transmission
directions
, which is NP-hard. We propose a |
V
|-approximation algorithm and one heuristic for the problem. Extensive simulations have demonstrated the efficiency of our algorithms.