1. GPP TS 23.002. (2011). Technical specification group services and systems aspects: Network architecture.
2. GPP TS 25.401. (2011). Technical specification group radio access network: UTRAN overall description.
3. GPP TS 25.413. (2011). Technical specification group radio access network: UTRAN Iu interface radio access network application part (RANAP) signaling.
4. GPP TS 25.415. (2011). Technical specification group radio access network: UTRAN Iu interface user plane protocols.
5. GPP TS 29.060. (2011). Technical specification group core network, general packet radio service (GPRS): GPRS tunnelling protocol (GTP) across the Gn and Gp interface.