General Support Functions
The GPRS core network provides mobility management, session management and transport for Internet Protocol packet services in GSM and WCDMA networks. The core network also provides support for other additional functions such as billing and lawful interception. It was also proposed, at one stage, to support packet radio services in the US D-AMPS TDMA system, however, in practice, all of these networks have been converted to GSM so this option has become irrelevant.
Like GSM in general, GPRS module is an open standards driven system. The standardization body is the 3GPP.
Read more about this topic: GPRS Core Network
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