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Mobile robots have been used to collect data in the network in order to reduce the energy consumed when forwarding data. In order to be energy efficient, mobile robots should be deployed and controlled in such a way as to minimize travel distance. To do this, we examined multiple deployment and movement policies and their effects on the performance of a network. We tested three different deployment...
Mobility within Wireless Sensor Networks (WSNs) has proven to be quite useful in prolonging the lifetime of these networks. This mobility requires intelligent control of the robots in order to efficiently complete tasks within the network. If the tasks required of the network need to send audio-video data back to the base station, then we need to maintain some connectivity with the base station in...
Researchers have recently exploited the use of mobile sinks in WSN and shown its potential benefits in energy savings. In order to maximize these savings and meet other QoS requirements, the mobile sink should collect all the data from the sensors during its limited contact time. This necessitate the provisioning of appropriate mechanisms to improve packet reception rate (PRR) from sensor nodes to...
Many-to-one traffic pattern in wireless sensor networks (WSNs) causes significant performance degradation toward the sink. To mitigate this so called funneling phenomenon, researchers have proposed various mechanisms at different layers. In this paper, we consider batch forwarding or packet concatenation at network layer, and experimentally demonstrate how it improves the delivery ratio and end2end...
Reliable data transfer (RDT) is one of the key issues in wireless sensor networks (WSNs) and can be achieved by using link-level re-transmissions and multi-path routing. Another key issue is the scalability of WSNs. In this paper, we try to better understand and characterize/quantify the relationships between reliability and scalability, and identify possible design options for the future RDT protocols...
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