Easy Concept of 5G Initial Registration

5G NR
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The main procedures are registration request, authentication check, retrieval of user data, policy data, and registration accept.

AMF, AUSF, UDM, and PCF work together to complete the initial registration.

:maple_leaf: Initial Registration Request: When a new user accesses the 5G network for the first time, they must register for access permission

Initial Registration Request
Initial Registration Request743×570 51.3 KB

:closed_lock_with_key: Authentication Check: AMF sends user information to AUSF and UDM for authentication. UDM instructs AUSF and AMF to authenticate the user. Bidirectional authentication is performed between the user and the network.

Authentication Check
Authentication Check876×332 56.2 KB

:four_leaf_clover: UE Subscription Data & Policy Data: After authentication, AMF retrieves subscription data from UDM and policy data from PCF. AMF will allocate network resources to the user based on their subscription

UE Subscription Data & Policy Data
UE Subscription Data & Policy Data912×342 53.7 KB

:mushroom: Registration Accept: AMF notifies the user that the registration is complete, allowing access to the 5G network.

Registration Accept
Registration Accept827×383 47.9 KB

If you want to know more details about 5G initial registration, please check the link below. Great explanation :point_right: https://www.youtube.com/watch?v=mIG6RdRMPMM

LinkedIn: :point_down:

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