5G Virtual Network

Description

The 5G Virtual Network (5GVN) is a standardized service concept defined by 3GPP that allows Mobile Network Operators (MNOs) to offer managed, end-to-end communication services to enterprise customers. It is fundamentally a logical overlay network, constructed using the underlying capabilities of a public 5G System (5GS), including Network Slicing, QoS frameworks, and policy control. A 5GVN is not a physical network but a service abstraction that provides a dedicated, isolated, and customizable communication environment for a specific enterprise or group of users, with defined performance characteristics and management interfaces.

Architecturally, a 5GVN is realized through the coordinated configuration of multiple 5G network functions. Its foundation is a dedicated Network Slice, or a set of slices, which provides the resource isolation and traffic separation. The 5GVN service model then adds higher-level service parameters, management capabilities, and exposure functions on top of this slice. Key components involved include the Network Slice Selection Function (NSSF) for slice selection, the Policy Control Function (PCF) for enforcing service-specific policies, the Unified Data Management (UDM) for subscription handling, and the Network Exposure Function (NEF) for securely exposing network capabilities and service management to the enterprise or a third-party service provider.

The operation of a 5GVN begins with its provisioning, which involves the MNO defining the service profile. This profile includes parameters such as the set of subscribed User Equipment (UE), the geographic service area, the required network slice(s), specific QoS profiles (e.g., guaranteed bit rate, latency), access control rules, and the allowed Data Network Names (DNNs). When a subscribed UE attaches to the network, the 5G core identifies its association with a 5GVN and steers its traffic through the correspondingly configured slice instance, applying the defined policies for session management, mobility, and charging.

The role of the 5GVN in the network is to bridge the gap between raw network capabilities and consumable business services. It provides a standardized framework for MNOs to productize and monetize advanced 5G features like network slicing, turning them into billable, customer-manageable services. For the enterprise, it offers a 'virtual private network' experience with SLAs, self-service portals for limited management (via exposed APIs), and seamless integration with their existing IT systems, all without the capital expenditure and operational burden of deploying a physically separate RAN and core network.

Purpose & Motivation

The 5G Virtual Network concept was introduced to address the growing demand from vertical industries (e.g., manufacturing, logistics, utilities) for high-performance, reliable, and secure private mobile networks. While traditional enterprise solutions like VPNs over best-effort internet lack performance guarantees, and dedicated private networks are costly and complex to deploy, 5GVN offers a middle ground. It leverages the massive scale and advanced features of public 5G infrastructure to deliver private-network-like capabilities as a service, solving the problems of high upfront investment, spectrum licensing, and specialized operational expertise required for a fully private deployment.

Historically, previous cellular generations offered limited mechanisms for network customization for enterprises, primarily through Access Point Names (APNs) with basic QoS, which lacked isolation, granular policy control, and standardized service management interfaces. The motivation for 5GVN's creation in Release 17 was to provide a standardized, operator-managed service model that fully harnesses the 5G System's native support for network slicing, edge computing, and service-based architecture. This standardization is crucial for ensuring interoperability between operators and equipment vendors, enabling global service delivery and fostering a vibrant ecosystem of service providers and enterprise solutions.

Furthermore, 5GVN enables new business models for Mobile Network Operators, allowing them to move beyond connectivity and become enablers of digital transformation for industries. It addresses the limitation of one-size-fits-all public mobile broadband by providing a framework to create tailored network services with specific performance, security, and management attributes, thereby unlocking the revenue potential of 5G in the business-to-business (B2B) and business-to-business-to-consumer (B2B2C) markets.

Key Features

• End-to-end logical isolation via underlying Network Slices
• Customizable performance profiles with guaranteed QoS (e.g., latency, reliability)
• Standardized service lifecycle management (creation, modification, termination)
• Exposure of network capabilities and service management via NEF APIs
• Support for integration with enterprise IT systems and applications
• Flexible service scope definition (e.g., specific UEs, geographic areas, time periods)

Evolution Across Releases

Defining Specifications