Communication system and method of controlling the system

A communication system comprising a transmission device, a response device and a cooperative control apparatus for controlling cooperative processing between the transmission device and the response device,

• wherein the transmission device comprising:
• a storage unit configured to store response device information related to cooperative processing with the transmission device;
• a first register unit configured to register, in the cooperative control apparatus along with a transmission code relating to the cooperative processing, first cooperation information relating to the cooperative processing;
• a notification unit configured to notify the transmission code to the response device;
• a first acquisition unit configured to acquire, from the cooperative control apparatus, second cooperation information associated with a reply code received from the response device;
• and
• a first setting unit configured to set the response device specified by response device identification information included in the second cooperation information as a device with which to perform the cooperative processing, in a case where the response device identification information included in the second cooperation information corresponds to the response device information stored in the storage unit, and
• wherein the response device comprising:
• a second acquisition unit configured to acquire, from the cooperative control apparatus, the first cooperation information associated with the transmission code;
• a second register unit configured to register, in the cooperative control apparatus along with the reply code relating to the cooperative processing, the second cooperation information relating to the cooperative processing;
• and
• a second setting unit configured to request the cooperative control apparatus to authenticate the transmission device specified by the first cooperation information, and, if successfully authenticated, sets the transmission device specified by the first cooperation information as a device with which to perform the cooperative processing.