Linear clustering of objects with multiple attributes
SIGMOD '90 Proceedings of the 1990 ACM SIGMOD international conference on Management of data
Space-filling curves and their use in the design of geometric data structures
Theoretical Computer Science - Special issue: Latin American theoretical informatics
Analysis of the Clustering Properties of the Hilbert Space-Filling Curve
IEEE Transactions on Knowledge and Data Engineering
Mobility improves coverage of sensor networks
Proceedings of the 6th ACM international symposium on Mobile ad hoc networking and computing
Neighbor-finding based on space-filling curves
Information Systems
Localized Sensor Area Coverage with Low Communication Overhead
PERCOM '06 Proceedings of the Fourth Annual IEEE International Conference on Pervasive Computing and Communications
Sink mobility protocols for data collection in wireless sensor networks
Proceedings of the 4th ACM international workshop on Mobility management and wireless access
Twins: A Dual Addressing Space Representation for Self-Organizing Networks
IEEE Transactions on Parallel and Distributed Systems
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We consider applications of mobile wireless sensor actor networks(MWSAN) that require periodic readings and/or actions. In such a context, a single integrated sensor-actor can be used to monitor different regions of the target area if it is able to move from one region to another within some expected time limit. In this paper, we propose a mobility strategy that consists in making nodes follow a space-filling curve with good locality properties (i.e., regions close on the curve are also close on the area). This strategy has a number of advantages, such as higher possibility for merging readings when these latter present high spatial correlation (as in the examples listed above). We also propose that nodes use opportunistic contacts to reduce the delivery delay performed by the sensing module. Through a number of numerical analysis, we show that with a proper dimensioning of the system, we can achieve full area coverage and guarantee bounded delivery delays with a limited number of sensor-actor nodes.