Iub Link

Description

The IubLink is a managed function defined in the 3GPP Generic Network Resource Model (NRM), specifically within the GenericNetworkResourcesNRMDefs. It represents the entire Iub interface between a Radio Network Controller (RNC) and a NodeB in a UMTS Terrestrial Radio Access Network (UTRAN). The Iub interface is the logical interface that carries both user data and control signaling between the RNC and NodeB. The IubLink is a managed object that encapsulates the management aspects of the Iub interface, including its transport resources, configuration parameters, and performance metrics.

In the 3GPP management architecture, the IubLink is an instance of the ManagedFunction class, which is a generic class for representing managed functions in the network. The IubLink contains other managed objects, such as the IubcLink (common transport link) and possibly other links for specific bearers. The IubLink provides attributes and parameters that allow the network management system to configure and monitor the Iub interface, such as the transport layer address, the operational state, and the administrative state.

The IubLink is defined in 3GPP Technical Specification 28.653, which specifies the Generic Network Resource Model (NRM) for UTRAN. It is also referenced in TS 32.646, which specifies the configuration management (CM) for UTRAN. The IubLink is used by the network management system to manage the Iub interface, ensuring proper configuration and efficient operation.

The IubLink has been part of the 3GPP specifications since Release 10. Its definition has remained unchanged across all subsequent releases up to Release 19, indicating a stable and mature specification. The IubLink is a crucial component for managing the Iub interface, enabling operators to configure and optimize the backhaul network for UTRAN.

Purpose & Motivation

The IubLink exists to provide a standardized management representation of the entire Iub interface between an RNC and a NodeB. In UTRAN deployments, the Iub interface is essential for connecting the radio access network to the core network, and its management is critical for ensuring network performance and reliability. The IubLink provides a single managed object that represents the Iub interface, allowing operators to manage all aspects of the interface from a central management system.

Before the introduction of the IubLink, the management of the Iub interface was fragmented, with different managed objects for different aspects of the interface. The IubLink addresses this by providing a unified managed object that encapsulates all the management aspects of the Iub interface. This simplifies network management and enables more efficient operations, such as configuration, fault management, and performance monitoring.

The IubLink also supports the evolution of UTRAN towards higher capacities and more efficient transport. By providing a standardized management interface, it enables multi-vendor interoperability and simplifies network operations. The IubLink is part of the broader 3GPP management framework, which aims to provide a consistent and scalable management solution for mobile networks.