LTE

Access any service, anywhere using any device

System Architecture Evolution

evolved UMTA Terrestrial Radio Access Network

evolved Packet Core

IP Multimedia Subsystem: Services Network

Evolved Packet System: eUTRAN and EPC combined make the Access Network

User Equipment

evolved NodeB: Radio Access Management (RNC functionality)

Mobility Management Entity: Session and Mobility management, Inter-technology handovers

Guaranteed Bit Rate and Non-Guranteed Bit Rate determines what type of bearer is used for various Appications

• GBR - VOIP
• Non-GBR - IMS Signaling

Serving Gateway: Bearer Data Forwarding from UE to PGW

PDN (Packet Data Network) Gateway: IP Allocation, Data Rate Enforcement and UE default router

Home Subscriber Server: Subscriber info

Policy Charge Rule Function: Laison between IMS (Services Network) and LTE EPS (Access Network)

defines user plane between eNB and SGW

signaling between MME and eNodeB

used by MME to control bearer establishment and path switching in the SGW and PGW

establishes user plane for bearer traffic from SGW to PGW for Home Subscribers

establishes user plane for bearer traffic from SGW to PGW for Roamers

eNodeB Handoff

used by MME to retrieve subscriber data from the HSS

used by PCRF for policy enforcement and to retrieve traffic flow data

PGW connection to the Internet