CONTENT DISTRIBUTION DEVICE CONTENT PLAYBACK DEVICE CONTENT DISTRIBUTION SYSTEM METHOD FOR CONTROLLING A CONTENT DISTRIBUTION DEVICE CONTROL PROGRAM AND RECORDING MEDIUM

摘要

The disclosed content distribution device receives a request message requesting the transmission of content and if the sender of said request message is a relay device that retains requested content and forwards said requested content to other devices the content distribution device sends the requested content to said relay device. If the sender of the request message is a content playback device that plays requested content the content distribution device instructs said content playback device to acquire the content from a relay device to which the requested content had been previously sent.