Fragmentation-based distributed control system for software defined wireless sensor networks

Abstract

Software Defined Wireless Sensor Networks is a new and emerging network paradigm that seeks to address the impending issues in Wireless sensor networks. It is formed by applying Software Defined Networking to wireless sensor networks whose basic tenet is the centralisation of control intelligence of the network. The centralisation of the controller rouses many challenges such as security, reliability, scalability and performance. A distributed control system is proposed in this paper to address issues arising from and pertaining to the centralised controller. Fragmentation is proposed as a method of distribution, which entails a two level control structure consisting of local controllers closer to the infrastructure elements and a global controller which has a global view of the entire network. Distributed controller system brings several advantages and the experiments carried out shows that it performs better than a central controller. Furthermore the results also show that fragmentation improves the performance and thus have a potential to have major impact in the IoT.