| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the opportunities of network access as much as possible at the time of accessing an information source on a network and obtaining information contents. SOLUTION: The freshness of information is supplied to the information sources 11-13 on the network, and in the case of accessing the information source whose information contents are already obtained, a freshness judgement means 5 judges the freshness of the information. Only in the case of judging that the obtained information is not fresh, the network access is performed and the information contents are obtained. Also, in the case that the information contents of the information source can be obtained by data broadcasting, the information contents are stored at all times and the frequency of the network access is reduced.</p> |
