To provide a communication channel setting method that can prevent the setting of a communication channel from causing waste in the case of transmission to a mobile station of another network.
When a mobile station 311 makes a call to a mobile station 321 of another network, a switch station 331 in which the mobile station 311 resides transmits a transmission request of information of the mobile station 321 of the other network to a roaming user management station 361. The roaming user management station 361 transmits the transmission request of information of the mobile station 321 of the other network to a switch station 332 in which the mobile station 321 of the other network resides. The switch station 332 transmits the information of the mobile station 321 of the other network to the roaming user management station 361. The roaming user management station 361 transmits the information of the mobile station 321 of the other network to the switch station 331. The switch station 331 sets a communication channel with the switch station 332 based on the information of the mobile station 321 of the other network.
KOZU KAZUYUKI
SUGIYAMA KAZUO
Next Patent: POSITION INFORMATION NOTICE METHOD AND REPEATER