CAG

Technical Explanation

Closed Access Groups (CAG) prevent unauthorized public UEs from attempting to access private 5G campus networks. A private cell broadcasts a CAG ID in SIB1; only UEs whose USIM contains the matching CAG ID in their Allowed CAG List are permitted to access the cell.

Key Functions

• Restricts private 5G cell access strictly to authorized enterprise devices
• Broadcasts 32-bit CAG Identifier in SIB1 system information
• Prevents public cellular subscribers from camping on private enterprise radio cells