Analysis of beacon enabled ieee zigbee wireless network in wpan

The IEEE 802.15.4/ZigBee protocols embody promising technologies for WSNs, but are still ambiguous on how to efficiently build synchronized multiple-cluster networks, specifically for the case of cluster-tree topologies and mesh topologies. In fact, the current IEEE 802.15.4/ZigBee specifications restrict the synchronization to beacon- enabled (by the generation of periodic beacon frames) star networks, while they support multi-hop networking in mesh topologies, but with no synchronization. Quality of service (QoS) requirements can be satisfied in star based topologies using the Guaranteed Time Slots (GTS) feature of the IEEE802.15.4 standard, GTS communications in multi hop scenarios are currently limited by IEEE802.15.4 beacon scheduling designs. This restricts applications to run over sensors that are within radio range of the network coordinator. In this work, proposals are made for successful data transmission in multihop chain network. Throughput, efficiency and duty cycle are analyzed for each proposals made and finally their advantages and disadvantages are summarized at the end in conclusion

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Authors focus area of research includes primary health care issues; Risk factors for oral diseases among socially disadvantaged, marginalized and ethnic minority groups; Socio -psychological circumstances as correlates of oral health inequality; Oral health policy issues - focusing specifically on implementation of National oral health policy.