RTSS '04 Proceedings of the 25th IEEE International Real-Time Systems Symposium
Multi-hop wireless sensor networks with mobile sink
CoNEXT '05 Proceedings of the 2005 ACM conference on Emerging network experiment and technology
Wireless Sensor Networks: To Cluster or Not To Cluster?
WOWMOM '06 Proceedings of the 2006 International Symposium on on World of Wireless, Mobile and Multimedia Networks
Design and Optimization of Wireless Sensor Network with Mobile Gateway
AINAW '07 Proceedings of the 21st International Conference on Advanced Information Networking and Applications Workshops - Volume 02
Censor networks: a critique of "sensor networks" from a systems perspective
ACM SIGCOMM Computer Communication Review
MobiRoute: routing towards a mobile sink for improving lifetime in sensor networks
DCOSS'06 Proceedings of the Second IEEE international conference on Distributed Computing in Sensor Systems
Mobility-based communication in wireless sensor networks
IEEE Communications Magazine
Data Collection in Wireless Sensor Networks with Mobile Elements: A Survey
ACM Transactions on Sensor Networks (TOSN)
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In the wireless sensor network (WSN) literature, the use of a mobile sink is commonly viewed as one of the most successful means of load balancing and is often recommended as an effective defence against the so-called hot-spot phenomenon. In this paper, we investigate the real-world applicability of theoretical findings concerning sink mobility. The main contributions of the paper include: First, we analytically demonstrate that in small- to mid- size square-shaped WSNs implementing virtual grid topology the (outer) periphery is not necessarily the best performing mobile-sink trajectory, as earlier suggested in [10]. In such networks, the diagonal-cross appears to be at least as effective as the outer peripheral trajectory. Second, our OPNET-based study of IEEE 802.15.4 / ZigBee WSNs suggests that in these networks, once all of the protocol overhead is accounted for, no actual benefits of deploying a mobile- over deploying a static- sink can observed. Hence, for anybody contemplating the use of a mobile sink in ZigBee-based sensor networks, the minimization of protocol overhead may have to be the first course of action.