In the context of 5G (Fifth Generation) wireless communication, there isn’t a specific term or concept referred to as the “master node.” However, we can discuss various elements in the 5G network architecture that play central and coordinating roles. These elements collectively contribute to the efficient functioning of the network. Let’s explore some of the key components:
- gNB (Next-Generation NodeB): The gNB is the 5G base station that serves as the access point for user devices (UEs). It plays a central role in radio communication, handling tasks such as radio resource management, mobility management, and connection setup.
- AMF (Access and Mobility Management Function): The AMF is part of the 5G Core (5GC) and is responsible for access and mobility management. It handles tasks related to session management, mobility procedures, and security functions.
- SMF (Session Management Function): The SMF, part of the 5GC, focuses on session management. It is responsible for the establishment, modification, and termination of data sessions, ensuring the efficient transfer of user data.
- UPF (User Plane Function): The UPF is another component of the 5GC, responsible for handling the user plane data. It plays a key role in forwarding user data between the gNB and the external data networks.
- AF (Application Function): The AF, within the 5GC, interacts with the SMF to enable service-specific functions and policies. It helps in the customization of services based on the requirements of different applications.
- Master Cell Group (MCG): In the context of 5G NR (New Radio), the term “Master Cell Group” refers to the set of primary serving cells and common serving cells that provide connectivity and services to UEs. The cells within the MCG are coordinated to ensure efficient communication.
While these components are integral to the 5G architecture and contribute to the overall functionality of the network, it’s important to note that the term “master node” itself may not be standard terminology in the 5G specifications. The network architecture is designed with distributed functionality across various elements to ensure scalability, flexibility, and efficient operation. Each element has specific responsibilities within the network, and coordination among them contributes to the overall performance of the 5G system.