DYNAMIC SUPER FRAME ADJUSTMENT FOR DELAY MITIGATION IN IEEE 802.15.4 CLUSTER-TREE WIRELESS SENSOR NETWORKS

Abstract

_{The standard IEEE 802.15.4 is the most popular standard covering the use of Wireless Personal Area Networks (WPANs), which is mostly aimed at helping to deliver low data rates, low power Utilization, and affordable communication. Despite these, the standard has a fixed duty-cycle scheme that can cause latency and low throughput, especially in cluster-tree and multi-hop network architectures. To overcome these constraints, a dynamic delay-mitigation algorithm is proposed in this paper to adaptively adjust the super frame structure. The suggested method allows the PAN coordinator to make a Super frame Order (SO) of cluster heads dynamically, depending on the real-time network parameters such as the ratio of packet reception, traffic load, data rate, number of active nodes, and delay observed. Much simulation evidence indicates that the proposed scheme leads to significantly better network performance than the standard IEEE 802.15.4 protocol in terms of end-to-end interruption, packet delivery ratio, and throughput.}