Institute of Electrical and Electronics Engineers

Description

The Institute of Electrical and Electronics Engineers (IEEE) is a global professional association dedicated to advancing technology for the benefit of humanity. While not a 3GPP entity itself, IEEE's standards are extensively referenced and integrated within the 3GPP ecosystem, particularly for enabling interoperability with non-3GPP access networks. The most prominent example is the IEEE 802.11 family of standards for Wireless Local Area Networks (WLAN), commonly known as Wi-Fi. 3GPP specifications define architectures and protocols—such as those for Trusted and Untrusted Non-3GPP Access—that allow User Equipment (UE) to seamlessly connect to 3GPP core networks (like 5GC or EPC) via IEEE 802.11-based access points. This integration is managed through network functions like the Non-3GPP Interworking Function (N3IWF) and involves specific security protocols like EAP-AKA' for authentication over these links.

Beyond WLAN, IEEE standards influence other areas referenced in 3GPP. For instance, IEEE 802.3 (Ethernet) may be relevant for transport networks, and IEEE 1588 for precision time protocol synchronization. The relationship is formalized through normative references in 3GPP Technical Specifications (TS). For example, TS 23.402 (Architecture enhancements for non-3GPP accesses) and TS 24.302 (Access to the 3GPP Evolved Packet Core via non-3GPP access networks) detail how IEEE 802.11 interfaces are used. The specifications listed, such as 21.905 (Vocabulary for 3GPP Specifications), include IEEE terms, while others like 23.234 (3GPP system to Wireless Local Area Network interworking) define the interworking architecture itself.

The role of IEEE in 3GPP is foundational for network convergence. It allows operators to build heterogeneous networks that combine the wide-area coverage and mobility of 3GPP radio access (e.g., 5G NR, LTE) with the high-bandwidth, local-area capabilities of Wi-Fi. This provides a unified user experience, supports traffic offloading, and enables fixed-wireless convergence. The technical work involves aligning IEEE's layer 1 and 2 specifications with 3GPP's layer 3 and above protocols for mobility, session management, and security, ensuring a cohesive end-to-end system.

Purpose & Motivation

IEEE exists as an independent standards body to develop globally accepted technical standards across electrical, electronics, and computing fields. Its purpose within the 3GPP context is to provide mature, widely implemented standards for complementary access technologies, primarily WLAN, which 3GPP networks can leverage. This addresses the problem of network fragmentation and enables service continuity across different types of wireless access. Historically, cellular and Wi-Fi networks operated in separate silos. The motivation for integration arose from the need to provide users with seamless connectivity, optimize network resources by offloading traffic to Wi-Fi where available, and create converged service offerings.

By referencing IEEE standards, 3GPP avoids reinventing the wheel for local area wireless connectivity. It builds upon the massive global deployment and economies of scale of IEEE 802.11 devices. The limitations of previous approaches included proprietary or non-standard interworking solutions that hindered interoperability. Formal integration through 3GPP specifications, starting in earnest in Release 6 with WLAN interworking, provided a standardized, vendor-neutral framework. This allows any compliant UE to attach to any compliant 3GPP core network via any compliant IEEE 802.11 access point, which is essential for mass-market scalability and innovation in combined fixed-mobile services.

Key Features

• Provides globally recognized standards for Wireless Local Area Networks (IEEE 802.11/Wi-Fi)
• Enables standardized interworking between 3GPP and non-3GPP access networks
• Foundation for Trusted and Untrusted Non-3GPP Access architectures in 3GPP core
• Supports authentication and security protocols (e.g., EAP) for integrated access
• Facilitates traffic steering and offloading policies between 3GPP RAN and WLAN
• Enables Fixed Wireless Access (FWA) and converged network scenarios

Evolution Across Releases

Defining Specifications