Can anyone please tell why was there a need to add both SR and BSR from a terminal perspective to receive a grant from eNB? In my opinion only of them can serve the purpose. And, we could save some overhead.
Was BSR added by 3GPP purely for logical channel prioritization? So that, QoS could be respected from the Network side? By calculation priority delay for each bearer in access side.
Or, do you know if there was another intention from 3GPP to add both of these concepts together? Since I am still not familiar with 5G NR, can anyone also please tell if both of these concepts, exist in 5G NR also?