Management system, control apparatus, and method for managing session

A management system for managing a session for transmitting content data between a first terminal and a second terminal via a first relay apparatus and a second relay apparatus, the management system comprising:

• a plurality of control apparatuses including a first control apparatus and a second control apparatus, and
• a common control apparatus including a memory containing a management table
• wherein the first control apparatus includes:
• a first management table;
• a first determination unit configured to determine a first transmission quality of the content data transmitted in the session based on a transmission quality of the content data available for the first terminal and;
• a first selection unit configured to select the first relay apparatus, among a first group including a plurality of relay apparatuses that are located in a first predetermined area, to which the first terminal is to be connected based on the first transmission quality;
• and
• wherein the second control apparatus includes:
• a second management table;
• a second determination unit configured to determine a second transmission quality of the content data transmitted in the session based on a transmission quality of the content data available for the second terminal, and
• a second selection unit configured to select the second relay apparatus, among a second group including a plurality of relay apparatuses that are located in a second predetermined area, to which the second terminal is to be connected based on the second transmission quality,
• wherein the common control apparatus is configured to update the management table in response to receiving an update request from the first control apparatus and the second control apparatus, respectively, and
• wherein the common control apparatus is configured to synchronize the first and second management tables with the updated management table after the management table of the common control apparatus is updated.