Image transmission system, transmission apparatus, relay apparatus, and image transmission method

摘要

The present invention provides an image transmission system that comprises a transmission apparatus, and a relay apparatus that receives image information from the transmission apparatus and forwards the received image information to a reception apparatus, wherein the transmission apparatus receives a designation of a time limit by which the image information should arrive at the reception apparatus and transmits time limit information that indicates the time limit to the relay apparatus; the relay apparatus determines a forwarding time period during which the image information is to be forwarded to the reception apparatus, based on the time limit information as well as charge information that indicates, for each of time periods, a charge for forwarding the image information to the reception apparatus, and forwards the image information to the reception apparatus during the determined forwarding period.