5G Registration Flow:
- A 5G Stand Alone also known as Option 2, architecture includes 5G UE, gNB and 5G Core Network.
- 5G SA Registration Call Flow for OTA messages (b/w UE and gNB) and NGAP messages (b/w gNB and 5GC AMF).
- In 5G SA mode term Registration is equal to Attach in 4G LTE.
5G SA Registration call flow includes following Steps and shown in above figure:
- Achieving DL/UL sync via SSB decode and RACH Procedure
- SRB0 establishment with RRC Connection Request
- Contention Resolution and SRB1 establishment with RRC setup
- Registration Request
- NAS Procedures like UE Identity transfer, Authentication and Security
- AS UE Capability transfer and AS security
- SRB2 and DRB establishment
- Registration Complete and PDU session Establishment
Credits: BRAJESH KUMAR on LinkedIn: #5gnr #vi #jio #airtel #like #share
