Requirement Enhancement

Description

A Requirement Enhancement (RE) is a fundamental document type in the 3GPP standards development process. It is not a network function or protocol, but a procedural artifact used to formally define and justify new technical requirements or modifications to existing ones. An RE document is the output of a 3GPP Technical Specification Group (TSG) or Working Group (WG) after studying a new service, feature, or system aspect. It serves as the bridge between high-level service concepts and the detailed technical specifications that implement them.

The RE creation process typically begins with a Study Item (SI) or a feature proposal within a group like SA1 (Services) or RAN1 (Radio Layer 1). The group analyzes the proposed concept, its feasibility, and its impact on the system. The RE document captures the consensus on what needs to be standardized. It includes a detailed description of the requirements, such as functional capabilities, performance targets (e.g., latency, reliability, data rate), security aspects, and impacts on existing network entities and interfaces. The RE will reference specific use cases and scenarios that motivate the requirements.

Once approved by the relevant TSG, the RE is assigned to the appropriate specification groups (e.g., SA2 for architecture, SA3 for security, RAN groups for radio aspects) as a work item. These groups then develop or modify the normative Technical Specifications (TS) and Technical Reports (TR) to fulfill the mandated requirements. The RE document itself, often published as a Technical Report (e.g., TR 22.804 for a study on enhanced V2X), remains as a permanent record of the agreed-upon objectives and constraints. This process ensures that the development of complex specifications is driven by clear, agreed-upon needs, maintaining focus and traceability throughout the standardization lifecycle.

Purpose & Motivation

The RE process exists to provide structure, clarity, and traceability to the evolution of the 3GPP system. Mobile communication standards are immensely complex, involving hundreds of specifications. Without a formal mechanism to define and agree on *what* needs to be built before defining *how* to build it, the standardization process could become chaotic and inefficient. The RE serves as the formal contractual agreement among 3GPP members on the scope and goals of a new feature.

Historically, as 3GPP systems evolved from basic voice (3G) to broadband data (4G) and now to a platform for diverse industries (5G), the number of proposed features exploded. The RE process addresses the limitations of ad-hoc feature development by forcing a rigorous requirements phase. It ensures that all aspects—service requirements, security, regulatory needs, and network impacts—are considered holistically before detailed protocol design begins. This mitigates the risk of developing specifications that are technically sound but do not meet actual market or regulatory needs, or that create unforeseen conflicts with other system parts. It is a cornerstone of 3GPP's successful, collaborative, and multi-vendor standardization model.

Key Features

• Formal definition of new system capabilities and performance targets
• Traceability link between market needs and technical specifications
• Includes analysis of use cases, service requirements, and security needs
• Mandates impacts on network architecture, interfaces, and protocols
• Requires approval by a 3GPP Technical Specification Group (TSG)
• Serves as the basis for creating or modifying normative Technical Specifications (TS)

Evolution Across Releases

Defining Specifications