Energy-Efficient Protocol for Cooperative Networks
Venue
IEEE/ACM TRANSACTIONS ON NETWORKING, vol. 19 (2011), pp. 561-574
Publication Year
2011
Authors
Mohamed Elhawary, Zygmunt J. Haas
BibTeX
Abstract
In cooperative networks, transmitting and receiving nodes recruit neighboring nodes
to assist in communication. We model a cooperative transmission link in wireless
networks as a transmitter cluster and a receiver cluster. We then propose a
cooperative communication protocol for establishment of these clusters and for
cooperative transmission of data. We derive the upper bound of the capacity of the
protocol, and we analyze the end-to-end robustness of the protocol to data-packet
loss, along with the tradeoff between energy consumption and error rate. The
analysis results are used to compare the energy savings and the end-to-end
robustness of our protocol to two non- cooperative schemes, as well as to another
cooperative protocol published in the technical literature. The comparison results
show that, when nodes are positioned on a grid, there is a reduction in the
probability of packet delivery failure by two orders of magnitude for the values of
parameters considered. Up to 80% in energy savings can be achieved for a grid
topology, while for random node placement, our cooperative protocol can save up to
40% in energy consumption relative to the other protocols. The reduction in error
rate and the energy savings translate into increased life time of cooperative
sensor networks.
