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International Journal of Distributed Sensor Networks
Volume 2013 (2013), Article ID 632398, 7 pages
http://dx.doi.org/10.1155/2013/632398
Research Article

Congestion Control Based on Consensus in the Wireless Sensor Network

1Department of Mechanical and Electrical Engineering, Soochow University, Suzhou 215006, China
2School of Computer Science and Technology, Soochow University, Suzhou 215006, China
3College of Electronic and Information Engineering, Suzhou University of Science and Technology, Suzhou 215009, China

Received 7 June 2013; Accepted 15 August 2013

Academic Editor: Yong Sun

Copyright © 2013 Xinhao Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The congestion control algorithm based on the weighted directed graph is designed for the network congestion over the wireless sensor network. The congestion problem is modeled as a distributed dynamic system with time-varying delay, and it can be proven that the sent rate for all nodes converges to the available bandwidth of the sink by the proposed congestion control algorithm. Via Lyapunov function, the validity of the proposed algorithm is shown under the varying network topologies. Ns simulation results indicate that the proposed algorithm restrains the congestion over the wireless sensor network, maintains a high throughput and a low delay time, and also improves the quality of service for the whole network.