5G 101: unlocking the future of connectivity—an essential glossary

This section covers the strategic deployment choices, the architectural philosophy for open networks, and the global organization that defines 5G standards.

• Public and Private 5G Networks

  • Strategic Choice: For U.S. federal and defense audiences, the choice between public and private networks is a crucial strategic decision, directly affecting control, security, and mission readiness.
  • Private 5G Network: Uses private RAN and core infrastructure, ensuring full operational control and isolation from public networks, providing secure, resilient connectivity.
  • Public 5G Network: Utilizes commercial carrier infrastructure, offering broad geographic coverage and scalability, but may not necessarily meet strict federal security standards.
  • Hybrid Networks: Combine Public 5G infrastructure with private core systems.

• Open Radio Access Networks (O-RAN)

  • Definition: An architectural approach to building Radio Access Networks (RANs) that unbundles and standardizes the hardware and software components of a network.
  • Advantage: Unlike traditional RANs, O-RAN allows for components from multiple vendors to work together seamlessly.

• Open Interfaces

  • Definition: These interfaces, such as the O-RAN Alliance’s specifications combined with 3GPP-defined interfaces, facilitate interoperability between disaggregated RAN components.

• 3GPP (3rd Generation Partnership Project)

  • Definition: An umbrella term for several standards organizations that develop protocols for mobile telecommunications.
  • Role: The 3GPP defines many exciting use cases and applications enabled and enhanced through 5G Advanced.

This section details the technical elements that govern performance, deliver capacity, and enable specialized services.

• 5G Spectrum

  • Definition: 5G’s dominant strength is its ability to operate across a broad range of radio frequencies.
  • Low-Band (< 1 GHz): Provides the broadest geographic coverage at modest speeds (around 50 Mbps).
  • Mid-Band (1 GHz – 6 GHz): Balances speed and coverage for 5G connectivity in suburban and urban environments.
  • High-Band (mmWave, 24 GHz – 40+ GHz): Delivers the highest speeds, reaching up to 10 Gbps in controlled environments, but with limited range and high susceptibility to interference.

• Enhanced Mobile Broadband (eMBB)

  • Definition: One of three primary 5G New Radio (NR) use cases defined by the 3GPP.
  • Impact: The improved data rates and throughput are critical for applications requiring the rapid transfer of large datasets , such as high-resolution video streaming, augmented reality (AR), and virtual reality (VR) operations.

• Massive Machine Type Communications (mMTC)

  • Definition: Addresses the need to support a large number of devices in a small area that may only send data sporadically , such as Internet of Things (IoT) use cases.

• Massive MIMO (Multiple Input and Output)

  • Definition: A wireless technology that multiplies the capacity of a radio link using multiple transmit and receive antennas.
  • Impact: Massive MIMO more effectively exploits the spatial domain to improve the coverage, capacity, and user throughput of mobile networks. This is achieved by harnessing multi-antenna technologies, like beamforming and multiplexing.

• Network APIs (Application Programming Interfaces)

  • Definition: Standardized programming interfaces that allow developers to easily access 5G Advanced network capabilities , such as differentiated connectivity, location, security/authentication, and network insights.

While 5G deployment is still expanding, the industry has begun research and standardization for the sixth generation of wireless technology, “Future G”. Expected to be standardized by the late 2020s with commercial deployment around 2030, “Future G” is projected to be more than just a faster network; it will fundamentally change how networks are designed and operated.

Key Technological Leaps of “Future G”

• AI-Native, Cognitive Networks: 6G networks are envisioned as AI‑native, with AI/ML embedded in RAN, core, and management for closed-loop optimization, predictive resource allocation, and self-evolving behavior.
• Expansion into New Spectrum Ranges: 6G extends well beyond today’s mid-band and mmWave into upper‑mmWave, targeting 100+ Gbps peak throughputs with very high‑gain beamformed antennas.
• Integrated Sensing and Communications (ISAC): 6G waveforms and RAN/core architecture are being designed to simultaneously provide connectivity and environmental sensing (e.g., localization, mapping, object detection) rather than treating sensing as an external system.