EGTS-based adaptive channel hopping mechanism for industrial WSN with mesh topology

Abstract

In the extreme industrial environment, the channels used by Wireless Sensor Network (WSN) were affected by so many factors that their qualities presented time-varied characteristic. In order to improve the reliability of the network, the multi-channel adaptation was proposed in IEEE802.15.4e draft exploiting 16 channels at 2.4G frequency band, which altered the channel dynamically according to the quality of the current channel. In this paper, a feasible adaptive channel hopping mechanism was introduced, especially for mesh topology WSN. In the proposal, every node selected a reserved channel for every link and informed its one-hop neighbors actively, and adjusted it passively when its neighbors enabled the reserved channels. We also presented an implementation of the mechanism using the primitives and the frame structure of EGTS. Finally, its reliability was analyzed and it was verified by simulation based on the real link data, and the effects of different parameters used in the simulations were contrasted. © 2011 Springer-Verlag.