Interworking and interoperability of GPRS systems with systems of other technology families
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United States of America Patent
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-
Jun 28, 2005
Grant Date -
Jul 18, 2002
app pub date -
May 31, 2001
filing date -
Jan 12, 2001
priority date (Note) -
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Abstract
A GPRS interworking and interoperability function (IIF) is interposed between a serving GSM/GPRS wireless system and a second wireless system of a different technology family to allow a mobile station homed to the second wireless system to operate in the GSM/GPRS system. The IIF executes or emulates the behavior of a GPRS HLR when communicating with the GSM/GPRS system, and executes or emulates the behavior of an MSC/VLR of the home system technology family when communicating with the home system. When a mobile station registers in the serving system, the MSC/VLR portion of the IIF transmits a registration notification message to the home system HLR specifying the address of an associated SGSN as though it were an MSC.
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