| 摘要 |
A data sharing system in which a request possibility determination unit (13) for a communications terminal (1-1) determines whether or not communications time required for obtaining data from a communications terminal (1-2) can be secured, between the communications terminal (1-2) and the communications terminal (1-1). A data acquisition unit (12) that: determines data that has not been stored in a data storage unit (14), among data on a list received as a result of a communications message from another communications terminal (1-2); and requests the determined data from the communications terminal (1-2), by using a communications message and on the condition that the request possibility determination unit (13) has determined that communications time can be secured. |
