What is GGSN and SGSN?

The gateway GPRS support node (GGSN) converts the incoming data traffic coming from the mobile users through the Service gateway GPRS support node (SGSN) and forwards it to the relevant network, and vice versa. The GGSN and the SGSN together form the GPRS support nodes (GSN) .

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What is Geran and UTRAN?

GSM EDGE Radio Access Network (GERAN) is a radio access network architecture, based on GSM/EDGE radio access technologies . The GERAN is fully harmonised with the UMTS Terrestrial Radio Access Network (UTRAN) through a common connectivity to the UMTS core network.

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