5G Tutorial
5G Introduction
5G Network Function
5G Network Function Service
5G Definitions
5G Concepts
Architecture Reference
Data Storage Architectures
Non-3GPP Access
Non-3GPP Access Reference Points
Network Analytics architecture
Network Access Control
Http Status Codes
Http Custom Headers
Common Data Types
Service Based Architecture
Network Functions
Reference Points
Reference Points
Protocol Errors
Http Mandatory Headers
AMF Function
AMF Functional Description
AMF Specifications
AMF Services
SMF Function
SMF Functional Description
SMF Specifications
SMF Services
UPF Function
UPF Functional Description
PCF Function
PCF Functional Description
PCF Specifications
NEF Function
NEF Functional Description
NEF Specifications
NRF Function
NRF Functional Description
NRF Specifications
UDM Function
UDM Functional Description
UDM Specifications
AUSF Function
AUSF Functional Description
AUSF Specifications
N3IWF Function
N3IWF Function Description
Application Function
Application Functional Description
UDR Function
UDR Functional Description
UDR Specifications
UDSF Function
UDSF Functional Description
SMSF Function
SMSF Functional Description
SMSF Specifications
NSSF Function
NSSF Functional Description
NSSF Specifications
5G-EIR Function
5G-EIR Functional Description
5G-EIR Specifications
LMF Function
LMF Functional Description
LMF Specifications
SEPP Function
SEPP Functional Description
NWDAF Function
NWDAF Functional Description
NWDAF Specifications
Data Types

Network Access Control

Network access is the means for the user to connect to 5G CN. Network access control comprises the below functionality

Network selection

To determine to which PLMN to attempt registration, the UE performs network selection. The network selection procedure comprises two main parts, PLMN selection and access network selection.

Identification and authentication

The network may authenticate the UE during any procedure establishing a NAS signalling connection with the UE. The network may optionally perform an PEI check with 5G-EIR.


The authorisation for connectivity of the subscriber to the 5GC and the authorization for the services that the user is allowed to access based on subscription (e.g. Operator Determined Barrings, Roaming restrictions, Access Type and RAT Type currently in use) is evaluated once the user is successfully identified and authenticated. This authorization is executed during UE Registration procedure.

Access control and barring

UE needs to transmit an initial NAS message, the UE shall request to establish an RRC Connection first and the NAS shall provide the RRC establishment related information to the lower layer.

Policy control

Network access control and services authorization may be influenced by Policy control defined by the operator

Lawful Interception

Lawful Interception


5G UE Route Selection Policy

posted on 2019-04-08 07:35:20 - 5G Tutorial Tutorials


5G UE Reachability Request Parameter for AMF

posted on 2019-04-08 07:35:04 - 5G Tutorial Tutorials


5G Uniform Resource Identifier

posted on 2019-04-08 07:34:48 - 5G Tutorial Tutorials

Prompt Examples

ChatGPT Prompt Examples

posted on 2023-06-21 22:37:19 - ChatGPT Tutorials

Use Cases

Chat GPT Key Use Cases

posted on 2023-06-21 21:03:17 - ChatGPT Tutorials

Prompt Frameworks

Prompt Frameworks

posted on 2023-06-21 19:33:06 - ChatGPT Tutorials