Why change the UMTS Core?
Overview of SAE
Major Change Items
Implications of all this.
Relationship to the Core of the LTE eNodeB
Structure
Main Components
MME (Mobility Management Entity):
SAE Gateway or SGW (Serving Gateway)
PGW (PDN – Packet Data Network Gateway)
HSS (The Home Subscriber Server)
Interfaces between EPC and the Access Network
............. S1: Signalling between Evolved NodeBs and the Core
EPC Internal Interfaces
Role and Relationship to Rest of Core
IM Subsystem Entities
Interfaces to Core
Interworking with UMTS
Interworking with WLANs
Presence Service
MBMS