LTE SAE EPS BEARERS

EPS BEARERS

EPS BEARERS:

·   EPS Bearer spans across LTE Network From UE to PGW

·   Every EPS Bearer created for a UE contains a ID for managing it across the network

·   Every EPS Bearer is associated with a Quality Of Service Class Identifier (QCI)

PDN AND APPLICATIONS:

·     Every UE May Contain Many EPS Bearers. Each EPS Bearer would contain a Different QoS Implementation!

·     Every UE which is ‘Attached’ to an LTE Network Must

–   At Least Be Connected To One ‘PDN’

–   For Every PDN UE Is Connected, It Must

o  Have '1' Default Bearer

o  '0' OR More Dedicated Bearers

• EPS BEARER PROPERTIES

• DEFAULT AND DEDICATED BEARER

·         GBR(Guarantee bit rate): Guarantee delivery of packets on high priority

·         NGBR(Non-GBR): No guaranteed delivery, priority can be late.

·         MBR(Maximum Bit rate): MBR is always greater than GBR.

·         QCI(Quality of Service class Identifier): Below Table for QCI.

·         ARP(Allocation Retention Priority): Used to set priority to reduce the congestion in the network.

·         AMBR(Aggregate MBR): Total data rate applicable for mobile phones in the particular PDN so AMBR is divided into multiple MBR.