MAC does priority handling on the basis of QoS Flow Identifier (QFI) given by SDAP, so in fact MAC is just following the instructions of SDAP.
In LTE we use headers in one side and followed by data PDU,but why there is a change in 5G . like after every single header there is a PDU and so on?
What is the priority order of LC's such as (CRNTI MAC CE,BSR MAC CE,PHR MAC CE,PHR MAC CE,CCCH etc) In 4G it is CCCH/C-RNTI MAC CE -> BSR MAC CE -> PHR MAC CE and what about 5G?
What could be the reason for defining logical channel grouping concept in LTE ? Why logical channels can't be used independently ?