| 摘要 |
A client-server vehicle data communication system for efficiently updating service contents stored in the client terminal and minimizing wasted time and cost for communication. A server of the system has a service contents managing section for managing a plurality of service contents to be provided to a client terminal of a vehicle. The service contents managing section includes a cache identifier providing section for assigning each service content provided to the client terminal a cache identifier which indicates a data cache state in the client terminal, so as to manage the data cache state of the service content. The client terminal has a cache state managing section for managing the data cache state of the service content provided from the server, according to the cache identifier assigned to the service content.
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