This TS defines the requirements for Packet Domain interworking between a
PLMN and a PDN, and between a PLMN and a PLMN.
This TS is valid for a PLMN in A/Gb mode as well as for a PLMN in Iu mode.
For interworking between EPC PLMN and external networks, the present document is valid for both 3GPP accesses
and non-3GPP accesses.
This TS also defines, the protocol for the Gmb
interface, the protocol for the SGmb
interface, and the protocol for the Mz