A Cooperative Transmission Scheme with Dynamic Clustering Based on Splitting and Reorganization for Event-Driven WSNs

Continuous event monitoring for large-scale wireless sensor networks (WSNs) is one of the important applications. In these applications, clusters should be efficiently and dynamically organized and of appropriate size. This paper proposes a cooperative transmission scheme with dynamic clustering based on splitting and reorganization for monitoring applications. When no event occurs, a static network model with a hierarchical clustering tree for large-scale WSNs is proposed. Once the event was triggered, a dynamic clustering scheme based on splitting and reorganization according to the characteristics of event diffusion is proposed. Moreover, selection cooperation is introduced into the data transmission of cluster head(CH) and a cooperative transmission protocol by utilizing a feedback mechanism is designed to enhance the transmission reliability of the event area. Simulation results show that the proposed scheme can effectively improve the transmission reliability for wireless sensor networks driven by diffuse events.