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Mobility-assisted data collection in wireless sensor networks offers them a new approach to reducing and balancing the energy consumption of sensor nodes, however, the resultant data collection latency may be large due to the limited travel speed. Much research effort has been made on reducing the data collection latency with the scenario of a single mobile device. A potential problem with this is its scalability, and a straightforward solution is to employ multiple mobile devices to collect data collaboratively. In this paper, the data collection with multiple heterogeneous mobile devices, in terms of the capability to conduct data collection, is investigated.
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