APPARATUS, SYSTEM, AND METHOD OF CONTROLLING SESSION, AND CARRIER MEANS

摘要

A control system (5) includes a first control apparatus (50x) and a second control apparatus (50y). The first control apparatus (50x) obtains information regarding a plurality of relay devices for relaying content data in a session to be established among a plurality of communication terminals (10aa, 10bb), and determines one of the plurality of relay devices (30xx, 30yy) as a representative relay device to manage a relay destination of content: data in the session to be established. The second control apparatus (50yy) receives, from a first communication terminal (10bb) of the plurality of communication terminals subject for participation in the session, a request for starting relay of content data. The second control apparatus (50yy) further transmits, with a request for starting relay of content data, the relay device identification information of the representative relay device (30xx) to a first relay device (30yy) connected to the first communication terminal (10bb), to cause the first relay device (30yy) to further transmit the request for starting relay of content data to the representative relay device identified with the relay device identification information of the representative relay device. The relay device identification information of the representative relay device is transmitted from the first control apparatus (10xx) to the plurality of communication terminals subject for participation in the session. The first communication terminal (10bb) sends the relay device identification information of the representative relay device with the request for starting relay of content data.