Bandwidth request system, bandwidth requesting device, client devices, the bandwidth request method, content playback method, and program

摘要

A bandwidth requesting system (10) includes: a bandwidth requesting device (30) provided to a network (14) to which a plurality of client devices (40) configured to play contents are connected; a router (16) provided externally from the network (14) and connected to the network (14); and a relay server (20) provided externally from the network (14) and connected to the network (14) via the router (16); wherein the bandwidth requesting device (30) determines an appropriation request bandwidth based on all bandwidths which the plurality of client devices (40) connected to the network (14) need, and requests the determined appropriation request bandwidth to the relay server (20) via the router (16); and wherein the relay server (20) determines a bandwidth to appropriate to the network (14), based on a bandwidth capacity which can be appropriated to the network (14) and the appropriation request bandwidth requested from the bandwidth requesting device (30), and sends the determined bandwidth to the bandwidth request device (30), via the router (16).