Performance study of beacon-enabled IEEE 802.15.4 standard in WSNs with clustering

To support high scalability and better data aggregation, sensor nodes are often grouped in to disjoint and mostly non overlapping sub sets called clusters. Clusters create hierarchical WSNs which facilitate efficient utilization of limited resources of sensor nodes and thus extends network lifetime. ZigBee, a communication standard for LR-WPAN (Low Rate Personal Area Networks), has low power consumption, complexity and cost. ZigBee uses the IEEE 802.15.4 standard as its communication protocol for Medium Access Control (MAC) layer and physical (PHY) layer. The IEEE 802.15.4 MAC standard achieves duty cycle Operation by setting two system parameters, macBeaconOrder (BO) and macSuperframeOrder (SO), to achieve low power consumption for different value of duty cycle. In this Paper we have analyzed cross layer (MAC/PHY) approach for wireless sensor network scenario with clustering in which we consider LEACH(Low energy adaptive clustering hierarchy protocol) algorithms as clustering protocol and DYMO (Dynamic MANET on-demand) as a routing protocol and analyze improvement of clustered over not clustered WSNs. We have calculated the attributes like average jitter, end to end delay, throughput and total charge consumption for different % of duty cycle and have found improvement in network latency and average jitter.