Importance

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Abstract

There is provided a communication system including a plurality of communication devices including first, second and third communication devices and performable of one-on-one communication with one another. The first communication device includes: a search request reception part receiving a search request for data from the second communication device; a determination part determining whether or not data relevant to the search request is retained; a search request transmission part transmitting, when the relevant data is not retained, the search request to the third communication device; a data reception part receiving the data relevant to the search request from the third communication device; a data transmission part transmitting, to the second communication device that has transmitted the search request, the data received by the data reception part. The first communication device relays the search request and the data from/to the second communication device and the third communication device.

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First Claim