Opportunistic Synchronization for Improving IEEE 802.15.4 MAC Performance in Chain Topologies

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The most effective solution for energy saving in low-rate wireless sensor networks is maintaining eachnode in a doze state as long as possible. In order to guarantee network connectivity, the intervals at which thenetwork sensors are turned on and off have to be coordinated. Therefore, synchronization is a very criticalfunction for sensor networks.In this paper, we analyze the IEEE 802.15.4 MAC performance in sensor networks deployed in a chain topology.For this topology, critical inefficiencies can arise in case of multi-hop packet deliveries. We evaluate the impactof different synchronization schemes on the network performance, both in terms of network throughput and interms of energy consumption. We also show how the synchronization function can be opportunisticallyconfigured in order to emulate a token-like access mechanism, able to significantly improve the network
Lingua originaleEnglish
Numero di pagine5
Stato di pubblicazionePublished - 2010


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