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Data gathering systems are an important class of wireless sensor networks (WSNs). As the goals of such systems are long lifetime, high reliability, and unattended operation, efficient use of limited energy is crucial. This paper presents Bailigh, a low power cross-layer protocol designed for low rate periodic data collection. Bailigh schedules the network to wake up at regular intervals for brief...
Many sensor network applications feature correlated traffic bursts: after a period of idle time with almost no network traffic, many nodes have to transmit large amounts of data simultaneously. One example is volcano monitoring, where rare eruptions trigger many nodes simultaneously to transmit seismic data traces. For such applications, a MAC protocol should exhibit a low overhead both in idle mode...
In spite of the huge recent research effort in the field, energy efficiency remains one of the key issues in wireless communications. The area most affected by energy inefficiency is wireless sensor networks (WSN). In this paper we propose SESAM - a distributed MAC protocol, which, making use of application level information to predict future transmission instants between nodes, achieves an exceptional...
A wireless sensor network (WSN) is a collection of wireless mobile hosts forming nodes that are arbitrarily and randomly changing their locations and communicating without the aid of any centralized administration or standard support services. Nodes are classified as sensor nodes and routers. Some nodes act both as sensors and routers. While traditional MAC protocols must balance between throughput,...
Sensor network reprogramming is a challenging problem and code dissemination is one of the important part in this subject. This paper proposes a novel TDMA-based code dissemination protocol which can greatly reduce the redundant message receptions and collisions in the dissemination process. We divide a program image into pages and page dissemination is in pipeline to reduce latency and achieve easy...
Group testing has been used in many applications to efficiently identify rare events in a large population. In this paper, the concept of group testing is generalized to applications with correlated source models to derive scheduling policies for sensors' adopting cooperative transmissions. The tenet of our work is that in a wireless sensor network it is advantageous to allocate the same channel dimensions...
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