Wireless intercommunication system and group pairing method of intercommunication system

A group pairing method of a wireless intercommunication system, comprising the steps of:

• acquiring information on a first slave wireless intercommunication device and generating a first pairing list using a master mobile device;
• generating a second pairing list by sorting the first pairing list according to a set connection order using the master mobile device;
• transmitting the second pairing list and information on the set connection order from the master mobile device to a master wireless intercommunication device;
• receiving in the master wireless intercommunication device the second pairing list and the information on the set connection order from the master mobile device and generating a third pairing list by updating an existing master wireless intercommunication device pairing list based on the received second pairing list using the master wireless intercommunication device;
• transmitting the third pairing list and the information on the set connection order from the master wireless intercommunication device to the first slave wireless intercommunication device;
• receiving in the first slave wireless intercommunication device the third pairing list and the information on the set connection order from the master wireless intercommunication device and generating a fourth pairing list by updating an existing slave wireless intercommunication device pairing list based on the received third pairing list using the first slave wireless intercommunication device;
• generating a fifth pairing list by updating the fourth pairing list according to the information on the set connection order using the first slave wireless intercommunication device,
• transmitting the third pairing list and information on the set connection order from the master wireless intercommunication device to a second slave wireless intercommunication device, and
• receiving in the second slave wireless intercommunication device the third pairing list and the information on the set connection order from the master wireless intercommunication device, and generating a sixth pairing list according to information on the set connection order using the second slave wireless intercommunication device, and
• wherein the master wireless intercommunication device, the first slave intercommunication device, and the second slave wireless intercommunication device are wirelessly connected in series in the set connection order according to a predetermined command to form an intercommunication group to perform multipoint communication.