Rendezvous design algorithms for wireless sensor networks with a mobile base station
Proceedings of the 9th ACM international symposium on Mobile ad hoc networking and computing
Adaptive path scheduling for mobile element to prolong the lifetime of wireless sensor networks
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ACM Transactions on Sensor Networks (TOSN)
Optimizing data collection path in sensor networks with mobile elements
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Path Planning of Data Mules in Sensor Networks
ACM Transactions on Sensor Networks (TOSN)
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Recent research shows that significant energy saving can be achieved in wireless sensor networks by using mo- bile elements (MEs) capable of carrying data mechanically. However, the low movement speed of MEs hinders their use in data-intensive sensing applications with temporal con- straints. To address this issue, we propose a rendezvous- based approach in which a subset of nodes serve as the rendezvous points (RPs) that buffer data originated from sources and transfer to MEs when they arrive. RPs enable MEs to collect a large volume of data at a time without trav- eling long distances, which can achieve a desirable balance between network energy saving and data collection delay. We develop two rendezvous planning algorithms, RP-CP and RP-UG. RP-CP finds the optimal RPs when MEs move along the data routing tree while RP-UG greedily chooses the RPs with maximum energy saving to travel distance ra- tios. We design the Rendezvous-based Data Collection pro- tocol that facilitates reliable data transfers from RPs to MEs in presence of significant unexpected delays in ME move- ment and network communication. Our approach is vali- dated through extensive simulations.