The T2 interface is a 6G task control interface that enables task negotiation and coordination between cluster nodes and core network elements across network domains.
Definition
In a 6G network architecture, a central node (cNode) interacts with multiple network functions through different interfaces. The cNode is connected to a network access function, also referred to as a network access function (NAF), through a T3 interface. It is connected to a connectivity function control plane, referred to as CF-C, through an I4 interface. The cNode is further connected to a task control function (TCF) or a task process function (TPF) through a T2 interface.
The T2 interface is designed to support task-related signaling and coordination between network entities. It enables communication between cluster nodes and core network elements, especially when task negotiation needs to occur across different network domains. This makes the T2 interface an important component of task-oriented control in 6G systems.
By supporting cross-domain task negotiation, the T2 interface extends traditional control signaling beyond radio and connectivity management. It enables coordinated task execution, management, and control in networks that integrate communication, computing, and intelligent services.
Examples
In a 6G task-oriented network, cluster nodes and serving nodes perform task management through a Y1 interface. This interface is mainly used for coordinating task execution and management within a cluster.
Cluster nodes perform task negotiation with each other through a Y2 interface. This allows multiple cluster nodes to coordinate task decisions and resource usage.
When task negotiation needs to be performed across network domains, the cluster node communicates with a core network element through the T2 interface. This enables task coordination between access-side nodes and core network functions.
In addition, serving nodes perform task signaling or task data exchange between task entities (TEs) through a Y3 interface. Together, the T2, Y1, Y2, and Y3 interfaces form a structured task interaction framework for 6G networks.
Through this interface architecture, the T2 interface plays a key role in enabling scalable, distributed, and cross-domain task control in future 6G communication systems.
References
6G Task-Oriented Network Architecture and Interface Design
(T2, Y1, Y2, and Y3 Interface Concepts)