Interworking and interoperability of GPRS systems with systems of other technology families

摘要

A GPRS interworking and interoperability function (IIF) (368) is interposed between a serving GSM/GPRS wireless system (350) and a second wireless system (352) of a different technology family to allow a mobile station (356) homed to the second wireless system (352) to operate in the GSM/GPRS system (350). The IIF (368) executes or emulates the behaviour of a GPRS HLR when communicating with the GSM/GPRS system (350), and executes or emulates the behaviour of an MSC/VLR of the home system technology family when communicating with the home system (352). When a mobile station registers in the serving system (350), the MSC/VLR portion (386) of the IIF (368) transmits a registration notification message to the home system HLR (378) specifying the address of an associated SGSN (364) as though it were an MSC. <IMAGE>