What QoS classes exist in LTE?

Question

Which are the nodes involve to maintains QoS in term of lte and ToS w.r.t IP protocl for an ip packet in dwn & up link direction?

Answer 1

Lte has defined 1-to-9 QoS classes to provide different types of services through its network.
1-4 is used for GBR bearer and 5-9 is being used for Non-GBR bearer. Each bearer is assigned to a QCI (QoS Class Identifier) value.

In Lte, bearers are classified into two categories: default or dedicated.
default bearer usually a non-GBR bearer whereas dedicated bearer may be GBR or non-GBR.