06-07-2015, 01:43 PM
Energy savings optimization becomes one of the
major concerns in the wireless sensor network (WSN) routing protocol
design, due to the fact that most sensor nodes are equipped
with the limited nonrechargeable battery power. In this paper, we
focus onminimizing energy consumption and maximizing network
lifetime for data relay in one-dimensional (1-D) queue network.
Following the principle of opportunistic routing theory, multihop
relay decision to optimize the network energy efficiency is made
based on the differences among sensor nodes, in terms of both their
distance to sink and the residual energy of each other. Specifically,
an Energy Saving via Opportunistic Routing (ENS_OR) algorithm
is designed to ensure minimum power cost during data relay and
protect the nodes with relatively low residual energy. Extensive
simulations and real testbed results show that the proposed solution
ENS_OR can significantly improve the network performance
on energy saving and wireless connectivity in comparison with
other existingWSN routing schemes.