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Although various air-indices, e.g., Next Region (NR), have been proposed to support shortest path and distance queries at mobile clients on a road network, how to minimize the energy cost, which is dominated by the cost for obtaining traffic data from data broadcast, is still one of the most important performance objectives. Inspired by various preprocessing schemes in traditional computation models...
Various efficient indexing techniques have been proposed for formulating broadcast index to minimize the tune-in cost at mobile clients to support shortest path search in a road network. However, none of them is designed for shortest path continuous queries (SPCQ). Due to frequent updates of traffic data, an SPCQ has to be invoked periodically while the client is following the suggested shortest path...
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