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Multi-hop cluster hierarchy has been presented as an organization for large Wireless Sensor Networks (WSNs) that can provide scalable routing, data aggregation, and querying. In this paper, the authors revisit the fundamental problem of maintenance of such a hierarchy. To this end, they observe that, due to tightly coupling their operation with the topology of the hierarchy, existing state-of-the-art cluster hierarchy maintenance protocols may not necessarily be efficient. Based on their observations, they make a case for a novel gossip-based hierarchy maintenance protocol that decouples its operation from the hierarchy topology.
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