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Several studies in recent years have considered the use of mobile elements for data gathering in wireless sensor networks, so as to reduce the need for multi-hop forwarding among the sensor nodes and thereby prolong the network lifetime. Since, typically, practical constraints preclude a mobile element from visiting all nodes in the sensor network, the solution must involve a combination of a mobile...
In sensor network applications, data gathering mechanisms, which are based on multi-hop forwarding, can be expensive in terms of energy. This limitation challenges the use of sensor networks for applications that demand a predefined operational-lifetime. To avoid this problem, using of mobile element (ME) as a mechanical data carrier has emerged as a promising approach. However, practical considerations...
Sensor network which operates on battery are used to gather data in a variety of environments. The data collected by each node is communicated through the network to the sink, which uses all reported data to determine characteristics of the environment or detect an event. Prolonging sensor's operable lifetime is a main design challenge of these networks. A good energy saving technique in this direction...
Recently, using mobile gateway(s) as a mechanical data carries emerges as a promising approach to prolong sensor network lifetime and relaying information in partitioned network. These mobile gateways, which move in pre-determined paths, visit the sensors to upload their data. As the sensors data generation rate for different sensors may vary based on their locations, sensors need to be visited at...
Wireless sensor networks (WSNs) consist of miniature devices with sensing, computation and wireless communication capabilities. They are typically designed for hostile environments, where recharging a node is impractical. Thus, energy efficiency is vital. For substantial energy savings, cross-layer information sharing and in-network processing among sensors have emerged as promising solutions. In...
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