Khaled Almiani

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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(More)
— 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(More)
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 predetermined paths, visit the sensors to upload their data. As the sensors data generation rate for different sensors may vary based on their(More)
— 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(More)
— We consider the problem of gathering data from a sensor network using mobile elements. In particular, we consider the case where the data are produced by measurements and need to be delivered to a predefined sink within a given time interval from the time the measurement takes place. Mobile elements travel the network in predefined paths, collect the data(More)