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Deploying multiple mobile sinks is an attractive approach to enhance the performance of wireless sensor networks. In this paper, the authors address the scenario of two mobile sinks. The two sinks can travel in the same region or in the divided regions separately. The problems are formulated by a lattice-based network model. They deduce the network lifetime and delay of data delivery in different mobility patterns. The relation between network performance and number of mobile sinks is also discussed. Simulation results are provided to validate their theoretic analysis followed by performance comparison of different mobility patterns.
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