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On Mobility Management in Multi-Sink Sensor Networks for Geocasting of Queries
Pervasive Systems Research Group, Department of Computer Science, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
Ambient Systems B.V., Colosseum 15d, 7521 PV, Enschede, The Netherlands
* Author to whom correspondence should be addressed.
Received: 1 November 2011; in revised form: 21 November 2011 / Accepted: 28 November 2011 / Published: 1 December 2011
Abstract: In order to efficiently deal with location dependent messages in multi-sink wireless sensor networks (WSNs), it is key that the network informs sinks what geographical area is covered by which sink. The sinks are then able to efficiently route messages which are only valid in particular regions of the deployment. In our previous work (see the 5th and 6th cited documents), we proposed a combined coverage area reporting and geographical routing protocol for location dependent messages, for example, queries that are injected by sinks. In this paper, we study the case where we have static sinks and mobile sensor nodes in the network. To provide up-to-date coverage areas to sinks, we focus on handling node mobility in the network. We discuss what is a better method for updating the routing structure (i.e., routing trees and coverage areas) to handle mobility efficiently: periodic global updates initiated from sinks or local updates triggered by mobile sensors. Simulation results show that local updating perform very well in terms of query delivery ratio. Local updating has a better scalability to increasing network size. It is also more energy efficient than ourpreviously proposed approach, where global updating in networks have medium mobility rate and speed.
Keywords: geocasting; convex hull; local updating; mobile sensors; wireless sensor networks
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Cite This Article
MDPI and ACS Style
Erman, A.T.; Dilo, A.; Hoesel, L.; Havinga, P. On Mobility Management in Multi-Sink Sensor Networks for Geocasting of Queries. Sensors 2011, 11, 11415-11446.
Erman AT, Dilo A, Hoesel L, Havinga P. On Mobility Management in Multi-Sink Sensor Networks for Geocasting of Queries. Sensors. 2011; 11(12):11415-11446.
Erman, Ayşegül Tüysüz; Dilo, Arta; Hoesel, Lodewijk van; Havinga, Paul. 2011. "On Mobility Management in Multi-Sink Sensor Networks for Geocasting of Queries." Sensors 11, no. 12: 11415-11446.