Test Action Request Receiver

Description

The Test Action Request Receiver (TARR) is a functional entity defined within the 3GPP Management System architecture, specifically for the purposes of network testing and diagnostics. It operates as a server-side component that listens for and processes standardized test action requests. These requests are typically generated by a Test Action Dispatcher (TAD) or other management applications as part of automated test suites, fault management procedures, or service validation workflows. The TARR is responsible for interpreting the incoming request, which is formatted according to 3GPP specifications (e.g., using XML-based protocols), and then executing the corresponding test logic or triggering the appropriate test stimuli on the network or network element under test.

Architecturally, the TARR is part of the Operations Support System (OSS) or Network Management System (NMS). It interfaces with the Test Action Dispatcher and other management functions via standardized interfaces, such as the Itf-N (Northbound Interface) or other management reference points defined in the 3GPP Management and Orchestration (MANO) framework. The TARR may be a standalone server or a software module integrated into a larger network management platform. Its implementation involves robust message parsing, security authentication for incoming requests, and reliable execution engines to carry out the requested tests, which could range from simple connectivity pings to complex, multi-step service validation procedures.

The role of the TARR is critical for enabling proactive and reactive network assurance. It allows operators to automate the execution of test cases, reducing manual intervention and enabling continuous validation of network performance and service quality. By standardizing the receiver for test actions, 3GPP ensures interoperability between management systems and the network elements or test systems being controlled. The TARR's operation is detailed in 3GPP specifications like TS 32.321, which defines the test management concepts, and TS 32.326/327, which cover the information model and procedures for test management.

Purpose & Motivation

The TARR was introduced to address the growing complexity of 3GPP networks and the need for standardized, automated testing within network management operations. Prior to its standardization, testing and validation of network functions were often performed using proprietary, vendor-specific tools and scripts, leading to interoperability challenges and high operational costs for multi-vendor network environments. The creation of a standardized Test Action Request Receiver enables a decoupled architecture where test management applications can send commands to a generic receiver, which then interfaces with the specific network elements or test equipment.

This approach solves the problem of test automation at scale. It allows network operators to define test suites and scenarios in a vendor-agnostic manner and execute them across different network domains and technologies. The TARR, as part of the 3GPP Management System, supports the broader goals of Self-Organizing Networks (SON) and automated operations by providing a reliable mechanism to trigger diagnostic actions, collect results, and verify service integrity without manual intervention. Its development was motivated by the industry's shift towards more software-driven, agile network operations requiring continuous integration and deployment (CI/CD) practices, where automated testing is a fundamental component.

Key Features

• Standardized interface for receiving test action requests
• Supports automated execution of network diagnostic and validation tests
• Integrates with 3GPP Management System (OSS/NMS) architecture
• Enables vendor-agnostic test management and orchestration
• Facilitates interoperability in multi-vendor network environments
• Supports both proactive monitoring and reactive fault management test scenarios

Evolution Across Releases

Defining Specifications