This TS specifies the stage 3 of the control plane of the GPRS Tunnelling Protocol, Version 2 for
Evolved Packet System interfaces (GTPv2-C).
GTPv2-C shall be used across:
The procedures supported between the TWAN and the PGW on the S2a
interface, and between the ePDG and the PGW
on the S2b
interface are specified in TS 23.402