A cross-layer design for congestion control in UWB-based wireless sensor networks Online publication date: Tue, 04-Aug-2009
by Reena Pilakkat, Lillykutty Jacob
International Journal of Sensor Networks (IJSNET), Vol. 5, No. 4, 2009
Abstract: In this paper a cross-layer design for congestion control is proposed for wireless sensor networks (WSNs). The multiple access communication for the WSNs is assumed to be Ultra-Wide Bandwidth (UWB) Time-Hopping Spread-Spectrum (TH-SS) impulse radio. Joint congestion and power control is proposed and formulated as a network utility maximisation problem, which is then solved by distributed iterative algorithms for flow rate adaptation and power adaptation on every link. Power control algorithm allocates the right amount of power at the right nodes to alleviate the bandwidth bottlenecks, while maintaining the signal to interference-and-noise ratio above a given threshold for every link. Fluid flow simulations show that considerable improvement in throughput can be obtained while also transmitting at lower power levels. A comparative study of the performance of hop-by-hop and end-to-end congestion control mechanisms is also made. Hop-by-hop approach offers significant reduction in the buffer size requirement, under high feedback delays.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Sensor Networks (IJSNET):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook