EPS bearers and key QoS principles

EPS default bearer:
First established for a new PDN connection and remains established throughout the lifetime of the PDN connection
An EPS default bearer’s QoS retrieved from subscription data in HSS when doing initial attach
Default bearer should be Non-GBR
EPS dedicated bearer*:
According to specific service triggering with relevant QoS
Dedicated bearer can be GBR or non-GBR
*) Similar concept as 2.5G/3G Secondary PDP Context.
**) An SDF is defined by a set of parameters such as source IP@, destination IP@, Source Port, Destination Port, application protocol type (e.g. TCP, UDP).
A. Bearers Level QoS
One EPS bearer
(same QCI/ARP)
Service Data Flow**
e.g. video streaming
e.g. WEB browsing
e.g. e-mail