Rate enforcement in LTE?

Question

How rate enforcement is done in LTE, what is the node where uplink rate enforcement is applied and on which node downlink rate enforcement applies.

Answer 1

Rate enforcement for downlink is done at the PGW (in case of UMTS it is done at the GGSN) as this is the first node of entry for the traffic to enter into the Telecom Network from external world.
Rate enforcement for uplink is done at the eNodeB as this is the first node of entry for the traffic to enter into the Mobile Network from UE.
Hope this helps.

Answer 2

For downlink packets , PCEF pick the packet checks the Type of Service or DSCP field from IP header and then send packet to the appropriate bearer to met QoS requirement in LTE network. I am not sure about uplink packets. I think PDCP layer at eNB perform Uplink date rate enforcement.