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Information providing method which enables data communication costs to be reduced, and information providing system for implementing the method
Information providing method which enables data communication costs to be reduced, and information providing system for implementing the method
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机译:能够降低数据通信成本的信息提供方法以及用于实现该方法的信息提供系统
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摘要
An information method and system whereby information, from a set of original information which is updated at regular or irregular intervals, is provided from an information provider apparatus (1) to each information receiving apparatus (2) of respective users via a data transmission path (18) which can be selected in accordance with the type of data to be transferred, stated preferences of the user with regard to providing of data, current operating status of a data communication network, etc. A set of framework data are selected as data which are rarely updated, by monitoring original information that is to be provided, over a suitably long period, and are stored at the information providing apparatus and each information receiving apparatus. Thereafter until a new set of framework data are selected, any differences between newly updated original information and the framework data are obtained as variation data, and transmitted to be stored at each information receiving apparatus, which can reconstitute desired data on request from a user by combining appropriate parts of the locally stored framework and variation data, thereby minimizing the amounts of data which must be transmitted to the information receiving apparatuses.
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