Evaluation of Power-Aware Routing for Sensor Networks with Forwarder Nodes
Katsuhiro Naito, Kazuo Mori, Hideo Kobayashi
Wireless sensor networks are envisioned to consist
of many small devices that can sense the environment and
communicate the data as required. The most critical requirement
for widespread sensor networks is power efficiency since battery
replacement is not viable. Many protocols attempt to minimize
the power consumption by using complex algorithms. However, it
is difficult to perform these complex methods since an individual
sensor node in sensor networks does not have high computational
capacity. On the other hand, many sensor nodes should transfer
the data packet to the sink node that collects the required data.
Therefore, the operations of the sensor nodes over the route are
terminated; it is difficult to deliver the data packet to the sink
node even if some sensor nodes are active.
In this paper, we propose a simple power-aware routing
protocol for sensor networks. Our proposed protocol is based on
the ad hoc on-demand distance vector (AODV) protocol, which
is one of the reactive routing protocols. In addition, we introduce
forwarder nodes in the sensor networks in order to extend the
lifetime of the entire sensor network. From the simulation results,
we evaluate the performance of the protocols and clarify the effect
of forwarder nodes on the sensor networks.