ROAMING METHOD AND SYSTEM CAPABLE OF KEEPING CALL QUALITY OF INBOUND MOBILE COMMUNICATION TERMINAL

摘要

A roaming method for maintaining call quality of an inbound mobile communication terminal and a system therefor are provided to maintain call quality even in case of movement of an inbound terminal between MSC(Mobile Switching Center) border regions by only using essential communication standards for a CDMA(Code Division Multiple Access) region. An inbound mobile communication terminal(100) mounted with a GSM(Global System for Mobile Communication) SIM(Subscriber Identity Module) card delivers MIN(Mobile Identity Number) information to an MSC(120)(S202). The MSC confirms the MIN information, and delivers the MIN information of the inbound terminal to a GSM GLR(Gateway Location Register)(130)(S204). The GSM GLR confirms the MIN information of the inbound terminal, and checks the terminal. The GSM GLR notifies the MSC of normal processing results of location registration of the inbound terminal(S206).