The Network Access Function (NAF) in 6G is a key control entity that manages network access, connects with cNodes, connectivity and task control functions, and ensures seamless user access and session management.
Definition
In 6G networks, the Network Access Function (NAF) is a critical control entity that manages network access for user devices and terminals. The cNode is connected to the NAF through the T3 interface, enabling secure and coordinated network access.
NAF interacts with the connectivity function control plane (CF-C) through the T4 interface and with the task control function (TCF)/task process function (TPF) through the T2 interface. This ensures seamless integration of access, control, and task management across the network.
In addition to these 6G-specific interfaces, NAF also works with traditional network access technologies. Power over Ethernet (PoE) switches connect to access points (APs) of various models, providing both PoE power supply and network access functions.
Protocols such as PPP, Multilink PPP, PPPOE, PPTP, and L2TP are used to implement network access functionalities, allowing flexible and secure connections.
Examples
For example, when a terminal connects to the network, the cNode communicates with the NAF over the T3 interface to request access authorization. Simultaneously, NAF coordinates with CF-C via T4 for control signaling and with TCF/TPF via T2 for task-related operations.
In enterprise networks, PoE switches deliver power and connect APs to the NAF, providing network access and control for multiple devices in local domains.
Protocols like PPPOE or L2TP are often used in 6G edge deployments to manage network access for terminals while ensuring secure and reliable connectivity.
By combining these capabilities, NAF ensures high efficiency, security, and reliability in both access and computing planes of the 6G network.
References
6G Network Architecture and Access Control Concepts
(Network Access Function, cNode, CF-C, TCF/TPF Integration)