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To improve driving comfort and provide entertainment services, Vehicular Communication Networks (VCNs) have appeared as an emerging solution, which consists of Road-Side Units (RSUs) and On-Board Units (OBUs) to distribute multimedia contents. However, as most of OBUs always request the stored contents in the RSUs, how to update the contents in these RSUs when the original changes at its original servers has become an important issue to be dealt with. This paper proposes a novel method to resolve the above problem.
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