MOBILE COMMUNICATIONS METHOD

摘要

A mobile communication method in which the transmission system is changed while signals are being transmitted. System change information is transmitted with a high quality. For the high-quality transmission, change notifying information is transmitted before transmitting the system change information. Consequently, even though the system change information is not transmitted at the time specified by the change notifying information, this situation can be coped with by referring to the change notifying information. Therefore, the occurrence of erroneous calling, etc., caused by wrong change of the transmission system can be reduced.