5G Protocol Stack

Protocol Stack is a group of protocols that all work together to allow software or hardware to perform a function. TCP/IP protocol stack is a good example.

5G Protocol Stack =>

     Layer-1 (L1)   -   PHYSICAL Layer
     Layer-2 (L2)   -   MAC, RLC and PDCP layers
     Layer-3 (L3)   -   RRC layer

The Figure below depicts 5G Protocol Stack consisting of both User Plane and Control Plane protocol layers.







ref:

5G NR Architecture -  
5G Protocol Stack - http://www.rfwireless-world.com/Terminology/5G-Protocol-Stack-Layer-1-Layer-2-and-Layer-3.html

5G Protocol Stack (User Plane and Control Plane) - 
5G network architecture - http://www.rfwireless-world.com/Tutorials/5G-network-architecture.html

Misc -