5G Tech Solutions is designing 5G NR protocol stack and also provides staffing solutions for testing of gNB and 5G UE.It focuses on Layer 1, Layer 2 and Layer 3 protocols and features. The role of a L1/L2/L3 protocol testing engineer is to test and validate the functionality of the protocols. It is designed to provide a concise synopsis of the key areas associated with the 5G System, with focus on the concepts and drivers, and the end to end system architecture and key procedures associated with registration, PDU sessions and mobility.