Effect of distributed backoff mechanism to simple autonomous active period selection control in cluster-tree type IEEE 802.15.4 WSNs with cluster mobility

This paper aims to provide performance enhancement to cluster-tree type IEEE 802.15.4 WSNs under cluster mobility environments. The cluster mobility causes severe beacon collisions and greatly degrades the system performance. To enhance the system performance of WSNs with cluster mobility, the paper proposes a combination scheme of the simple autonomous active period selection control and the traffic adaptive distributed backoff mechanism, previously proposed in our recent work, and investigates an effect of the distributed backoff to the system performance. The results evaluated by computer simulation demonstrate the proposed scheme can improve the transmission performance and power efficiency in cluster-tree type WSNs under cluster mobility environments.