7. GPRS session management

7.1 Interworking with IP networks

GPRS networks can communicate with networks using the Internet protocol [15] , whether the Internet itself or corporate intranets. GPRS communicates with both IP version 4 (IPv4) and IP version 6 (IPv6) networks. The access point to the network outside the GPRS network is the GGSN, which is seen by the outside network as a regular IP router.

To meet security requirements, two transmission modes have been defined:

• transparent mode, for basic...