| 摘要 |
PROBLEM TO BE SOLVED: To reduce call losses or failures of channel switching in an entire mobile communication system by making a radio channel in communication changeable as necessary and making a satisfactory quality channel a dead channel. SOLUTION: This method periodically measures a communication quality a of a radio channel of a mobile station in communication, and when the quality a exceeds a required quality Th and when further, it also exceeds a threshold Th1, the method switches it to a dead channel of a communication quality b that exists between the Th and Th1 and releases a channel having a satisfactory communication quality a as a dead channel. Thereby, call loses or failures of channel switching can be reduced even in a mobile station that is located at an edge of a radio zone where it easily receives interference. Also, when an mobile station 42-1 communicates through a channel A of the quality a, a communication connecting request comes from a mobile station 42-2, and there is no allocable channel. In such cases, the method switches the channel A of the station 42-1 to a channel B of the quality b, allocates the channel A to the station 42-2 and avoids a call loss. |
