Feasibility analysis of controller design for adaptive channel hopping

Authors:
Branko Kerkez;Thomas Watteyne;Mario Magliocco;Steven Glaser;Kris Pister
Affiliations:
University of California, Berkeley, CA;University of California, Berkeley, CA;University of California, Berkeley, CA;University of California, Berkeley, CA;University of California, Berkeley, CA
Venue:
Proceedings of the Fourth International ICST Conference on Performance Evaluation Methodologies and Tools
Year:
2009

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Abstract

Communication reliability in Wireless Sensor Networks (WSNs) is challenged by narrow-band interference and persistent multichannel fading. Frequency-agile communication protocols have been recently designed and standardized to increase reliability. These protocols, however, do not adapt the set of channels they hop on to the environment. In this paper, we evaluate the efficiency of a controller which continuously samples all available frequency channels in order to operate on a channel which performs reasonably well. We show that the overall average link Packet Delivery Ratio when using this controller reaches 99.4%, and is higher compared to a single channel solution, on any channel. We evaluate the efficiency of this approach by simulating its behavior on connectivity traces gathered during a real-world deployment. This data set is dense in time and sufficiently large in number of nodes and time to be statistically valid. We believe that the use of connectivity traces for performance evaluation will become commonplace as the number and variety of these traces increases.