Technical Performance Requirement

Description

Technical Performance Requirements (TPRs) represent a formalized approach within 3GPP to establishing measurable and verifiable performance criteria for telecommunications systems, network functions, and individual procedures. Introduced in Release 20 and documented in specification 38.914, TPRs provide a common vocabulary and methodology for expressing what a system must achieve technically, independent of implementation details. They serve as the bridge between high-level service requirements, which express what users and operators need, and detailed test specifications, which verify that implementations actually deliver those needs. Without such a structured intermediate layer, performance expectations risk remaining vague or being inconsistently interpreted across different working groups and vendor implementations.

The architecture of TPRs rests on the principle of separating requirements from test methods while maintaining traceability between them. A TPR typically specifies a performance metric, the conditions under which it must be met, the reference configuration or scenario, and the acceptable threshold or target value. For example, a TPR might define a minimum throughput, maximum latency, or minimum reliability under a specified channel model, mobility scenario, and deployment topology. This decomposition allows multiple test cases to validate a single requirement and allows a single test case to contribute evidence toward multiple requirements. The specification 38.914 provides the framework within which these requirements are catalogued and organized.

In terms of how TPRs operate within the standardization lifecycle, they are developed after service and system requirements have been agreed, and they feed directly into the development of conformance and performance test specifications. Working groups use TPRs to align on what "good enough" means quantitatively, which is essential when multiple vendors must interoperate and when operators need to compare equipment from different suppliers. TPRs also inform simulation and emulation campaigns, since the same scenarios and parameters defined in a TPR can be reproduced in system-level simulations to predict performance before hardware exists.

Key components of a TPR include the performance metric definition, the measurement methodology, the reference scenario, and the pass/fail criteria. The measurement methodology is particularly important because a requirement without a defined measurement point is not verifiable. TPRs therefore often specify where in the protocol stack or network architecture a measurement is taken, what traffic model is used, and what assumptions about interference, load, and mobility apply. This level of rigor is what distinguishes TPRs from informal performance goals.

For telecom engineers and students, TPRs are valuable because they encapsulate the quantitative expectations of a technology in a single, authoritative place. They help engineers design systems that will pass certification, help researchers benchmark new algorithms against standardized baselines, and help students understand the concrete numbers behind abstract concepts like reliability or capacity. As networks grow more complex with features like network slicing, edge computing, and non-terrestrial integration, the role of TPRs in keeping performance expectations coherent across domains will only increase.

Purpose & Motivation

Technical Performance Requirements exist because telecommunications systems need objective, measurable criteria to determine whether they perform adequately. Before frameworks like TPRs were formalized, performance expectations were often expressed qualitatively or scattered across different specifications, leading to ambiguity during development, testing, and procurement. Vendors could claim compliance with a feature while delivering vastly different performance, and operators lacked a consistent basis for comparing equipment or validating deployments. TPRs solve this by providing a standardized structure for defining performance metrics, scenarios, and thresholds.

The motivation for introducing TPRs in Release 20 stems from the growing complexity of 5G-Advanced and future networks. With features such as network slicing, ultra-reliable low-latency communication, massive machine-type communication, and non-terrestrial networks, the space of possible performance dimensions has expanded dramatically. A single network element may need to satisfy dozens of distinct performance requirements across different service types and deployment scenarios. Manual, ad hoc specification of these requirements does not scale; a systematic framework is needed. TPRs provide that framework, enabling requirements to be catalogued, cross-referenced, and traced from service needs down to test cases.

By establishing TPRs as a distinct concept, 3GPP also improves collaboration between working groups. Service-oriented groups can express needs in user-centric terms, while performance and testing groups can translate those into technical metrics using a shared methodology. This reduces the risk of misalignment and rework, and it accelerates the path from specification to certification. Ultimately, TPRs exist to make performance an engineering quantity rather than a matter of opinion.