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The current IEEE 802.15.4 standard restricts the beacon enabled approach to star networks, while they support multi-hop networking in mesh but with no synchronization. In this paper there is proposal of a GTS with super-frame scheduling for the chain network and throughput is observed. The IEEE 802.15.4 MAC protocol supports two operational modes: the beaconless mode, in which node stay active all the time, and the beacon mode, in which beacon frames are periodically sent by coordinators to synchronize sensor nodes. The advantage of this synchronization scheme is that all nodes can wake up and sleep at the same time allowing very low duty cycles and hence save energy.
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