CIRCUIT CONTROLLING SYSTEM

摘要

PURPOSE:To ensure the continuous radio transmission for various types of information without discontinuing the working of a system even in case an exclusive control circuit becomes inactive with the disturbance due to an external fault, by using a spare exclusive control circuit after an automatic detection of the fault. CONSTITUTION:When a base station 2 detects an external fault 7, an information signal 4 is automatically changed to the information showing that an exclusive control circuit is switched. Then this information is transmitted, and an information signal 8 is transmitted from a new exclusive control circuit to stop the working of a system. Mobile stations 1 and 3 which are going to give requests of connection detect that the exclusive control circuit is switched with the signal 4 and then receive the signal 8 through the new exclusive control circuit. Then a connection request 9 is transmitted for the request of connection. On the other hand, the station which received the connection request through the new exclusive control circuit transmits a turn designating signal 8' to finish the use of the new exclusive control circuit. Then the stations 1 and 3 start calling 6 through a designated call circuit.