What is 5G MAC layer?

Data then goes through the service data adaptation protocol (SDAP) , a new protocol layer for quality of service (QoS) management. The higher protocol layers are based on LTE. The IP header is replaced with a 5G equivalent at the packet data convergence protocol (PDCP) layer.23 Tem 2020

The MAC sublayer of 5G NR protocol stack interfaces to RLC sublayer from above and PHY layer from below. It maps information between logical and transport channels . Logical channels are about the type of information carried whereas transport channels are about how such information is carried.24 Şub 2021

The MAC layer supports the functions such as connecting the upper layer with the lower layer, transferring data and controlling radio resource . The MAC layer is composed of a HARQ entity, a multiplexing/de-multiplexing entity, a logical channel prioritization entity, and a control entity.