User plane node Management Service

Description

The User plane node Management Service (UMS) is a specific management service defined in the 3GPP Management and Orchestration (MANO) framework. It falls under the umbrella of Network Resource Management (NRM) services and is dedicated to the lifecycle management of network functions that handle user data traffic, known as user plane nodes. The primary managed entity for UMS in 5G systems is the User Plane Function (UPF), but the concept applies to analogous user plane entities in previous generations, such as the Serving Gateway (SGW) and Packet Data Network Gateway (PGW) user plane in Evolved Packet Core (EPC).

Architecturally, UMS is typically realized as a set of capabilities within a Network Management System (NMS) or Element Management System (EMS). It exposes northbound interfaces, often based on 3GPP-defined information models using UML, to higher-level orchestration systems (like a Network Function Virtualization Orchestrator - NFVO) or to an integrated OSS. The service implements the standard FCAPS management areas: Fault Management (for alarm surveillance and fault recovery), Configuration Management (for provisioning and updating UPF parameters), Accounting Management (for collecting usage data), Performance Management (for gathering KPIs and metrics), and Security Management (for access control and security logging).

Operationally, UMS works by maintaining a managed object instance that represents each user plane node under its control. Through the Itf-N reference point or other management interfaces, it can receive commands from an operator or orchestrator to instantiate, configure, scale, or terminate a UPF. It continuously collects performance measurement data (e.g., throughput, packet delay, packet loss) and fault indications from the node. This data is then correlated, analyzed, and presented, enabling automated or manual actions to ensure user plane service quality and network efficiency. In a virtualized environment, UMS interacts with the Virtualized Infrastructure Manager (VIM) for the allocation of underlying compute and storage resources for the UPF.

Purpose & Motivation

The UMS was created to provide a standardized, abstracted, and automated method for managing the critical user plane components of mobile networks. As networks evolved towards all-IP architectures and later cloud-native, software-based deployments, the user plane nodes became more dynamic and numerous. Traditional, vendor-proprietary element management approaches were inefficient for multi-vendor networks and incapable of supporting rapid, automated lifecycle operations required for network slicing and on-demand service creation.

Its specification addresses the need for a common management service model that separates the management intent (e.g., 'ensure latency below 10ms for slice X') from the vendor-specific implementation details of a UPF. By defining UMS, 3GPP enables interoperability between management systems from different vendors and allows for centralized orchestration to treat user plane functions as manageable, composable resources. This is particularly vital for 5G, where the UPF can be deployed in a distributed fashion (e.g., at the edge) and its configuration (e.g., PDU Session anchors, traffic steering rules) must be dynamically adjusted based on user mobility and service requirements.

Key Features

• FCAPS management for user plane network functions (e.g., UPF, SGW-U)
• Standardized northbound management interface (e.g., based on 3GPP information models)
• Lifecycle management including instantiation, configuration, scaling, and termination
• Performance monitoring and collection of user plane KPIs (throughput, latency)
• Integration with virtualization infrastructure managers for resource allocation
• Support for automated management in line with ETSI NFV-MANO principles

Evolution Across Releases

Defining Specifications