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Data aggregation has been recognized as an effective technique for reducing communication costs while obtaining useful aggregated information. In this paper, we study the crucial problem of delay-constrained data aggregation in vehicular ad hoc networks (VANETs), which has not been well studied in the literature. With the analysis based on real traces, we observe that there is heterogeneity with node...
The proliferation of smartphones has enabled a novel paradigm, participatory sensing, which leverages the smartphones to collect and share data about their surrounding environment. Since the sensing tasks are location-dependent and have time features, it is crucial and challenging to find a proper allocation of sensing tasks to ensure the timeliness of tasks and the quality of sensing data. In this...
Online social networks (OSN) have been increasingly popular and attracted hundreds of millions of users, and they are usually deployed on cluster systems. A crucial problem for scaling online social networks is allocation and replication of user data records in cluster nodes with the objective of reducing access time and minimizing the costs of storage and intra-cluster communication. In these applications,...
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