Describe the 5G architecture, explaining the different entities and their functions.
1.) gNB – NR RAN
▪︎Propagation and providing coverage
▪︎radio resource management
▪︎Admission control
2.) AMF – Access and Mobility Function
▪︎Session Management
▪︎Registration Management
▪︎Connection Management
▪︎Mobilty Management
▪︎Reachability Management
▪︎Access Authorization
3.) SMF – Session Management Function
▪︎Session Establishment
▪︎Session Modification
▪︎Session Release
▪︎IP allocation Management
4.) UPF – User Plane Function
▪︎Anchor point, packet routing and forwarding
▪︎Lawful interception Support
▪︎IP allocation
5.) PCF – Policy Control Function
▪︎Provide Policy frame work
▪︎Cover the network behaviour
▪︎Policy rules
6.) UDR – Unified Data Repository
▪︎Contain users suggestions information
7.) UDM – Unified Data Management
▪︎User identification handling
▪︎Authorization Key Agreement(AKA)
▪︎Subscribers permanent identifier(SUPI)
▪︎Access authorization
8.) AUSF – Authentication Server Function
▪︎Preforms authorization
▪︎Store keys
▪︎Application influence on traffic routing
▪︎Accessing NEF(Network Exposure Function)
▪︎Interaction with the policy framework for policy control
9.) NSSF – Network Slice Selection Function
▪︎Selecting the Network Slice instances(SI) to serve the UE
▪︎Determining the allowed NSSAI(Assistant Information)
▪︎Determining the AMF set to be used to serve the UE