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Pulse-coupled synchronization is attracting increased attention in the sensor network community. Yet its properties have not been fully investigated. Using statistical analysis, we prove analytically that by controlling the number of connections at each node, synchronization can be guaranteed for generally pulse-coupled oscillators even in the presence of a refractory period. The approach does not...
In this paper, a novel cluster based adaptive MAC protocol for wireless sensor networks (WSN) is proposed, which is based on clustering network topology. In the proposed MAC protocol, sensor nodes can adjust the duty cycle freely according to traffic information collected by cluster head node. Meanwhile, by exploiting cross-layer routing information, sensor nodes can reduce the active period if no...
This paper introduces I-MAC, a new medium access control protocol for wireless sensor networks. I-MAC targets at improving both channel utilisation and energy efficiency while taking into account traffic load for each sensor node according to its role in the network. I-MAC reaches its objectives through prioritized and adaptive access to the channel. I-MAC performances obtained through simulations...
Time synchronization is essential in sensor network applications such as object tracking, consistent state updates, duplicate detection and temporal order delivery. In addition, reliability issues and fault tolerance in sophisticated sensor networks have become a critical area of research today. This paper proposes a lightweight fault tolerant time synchronization (LFTTS), an extension of fault tolerant...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
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