Is it mandatory that Bearers should be bi directional

Question

When UE is asking for DL dedicated bearers (e.g QCI 6) , Is it mandatory that Enb has to configure the UL dedicated bearers with QCI 6 or it UL bearer is optional. If it is mandatory then if UE dont have any uplink transmission means that resource is waste.How to handle this scenario

Answer 1

Qci 6 bearer is non gbr bearer. Core n/w sends both UL and DL QoS parameters for a bearer so eNB needs to configure both UL and DL QoS for a bearer. In case of non gbr bearer eNB does not reserve UL/DL resources dedicated. So if UE does not have any data to send in UL then UE will not make any SR. So eNB will not give UL grant. So these resources can be assign to those UE who have data in ul.