PERT: a new power-efficient real-time packet delivery scheme for sensor networks Online publication date: Fri, 27-Jun-2008
by Shanzhong Zhu, Wei Wang, Chinya V. Ravishankar
International Journal of Sensor Networks (IJSNET), Vol. 3, No. 4, 2008
Abstract: We present PERT, a power-efficient scheme to deliver real-time data packets in sensor networks. Time-sensitive sensor data is common in applications such as hazard monitoring systems, traffic control systems and battlefield command systems. Such data are associated with end-to-end deadlines, within which they must reach the Base Station (BS). We make two contributions in this work. Firstly, we propose a novel load-balanced routing scheme that distributes data packets evenly among the nodes relaying data towards the BS, avoiding bottlenecks and increasing the likelihood that packets will meet their deadlines. Secondly, we propose a method of grouping smaller packets into larger ones by delaying data transmissions at the relaying nodes whenever slack times are positive. Our packet grouping scheme significantly reduces packet transmissions, reduces congestion and saves power in the sensor network. We verify the effectiveness of our approach through extensive simulations of wireless network behaviour using the ns-2 simulation package.
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