Emerging 6G technology already promises to be transformative in terms of new use cases, performance and operational efficiency. When extended by high altitude platform stations (HAPS) and other non-terrestrial networks (NTN), the benefits will be scaled up to an unprecedented degree.

In a new whitepaper, “6G from the Stratosphere: The Role of HAPS in Key Use Cases”, the HAPS Alliance delivers an accessible yet detailed map of what that architecture will look like.

Setting the Stage: A Beyond Connectivity Vision for 2030

Sixth-generation (6G) networks are being defined under International Mobile Telecommunications for 2030 and beyond (IMT-2030), a framework established by the International Telecommunication Union (ITU), the United Nations agency responsible for global telecom standards.

This vision extends well beyond faster broadband. It anticipates ultra-low latency, massive Internet of Things (IoT) deployments, AI-enabled automation, and strict KPIs for reliability, capacity, and energy efficiency. Delivering that level of performance consistently — and globally — requires a new architectural model.

The Three-Layer 6G Architecture

The whitepaper outlines a multi-layer network composed of:

1. Surface layer – Terrestrial networks providing high-capacity coverage where ground infrastructure exists.
2. Stratospheric layer – HAPS positioned around 20 kilometers above Earth, each covering roughly 50–100 kilometers.
3. Space layer – Satellite systems extending connectivity to oceans, deserts, and airspace.

HAPS forms the vital middle layer, bridging terrestrial and satellite systems. Because it operates closer to Earth than satellites, it can offer lower end-to-end latency for certain applications while maintaining wide-area coverage.

With regenerative payloads (on-platform signal processing), beamformed radio (directed signal transmission), and onboard computing, HAPS platforms function as programmable network nodes. This enables local breakout, dynamic capacity allocation, and improved resilience across the access network.

 High-Impact Use Cases

The whitepaper explores how this architecture supports priority 6G scenarios, including:

• Direct-to-unmodified smartphone (D2US) connectivity without device changes.
• Rapid disaster recovery through temporary stratospheric deployment.
• Vehicular connectivity, including cellular vehicle-to-everything (C-V2X).
• Public safety and infrastructure monitoring through integrated sensing and communication.
• Shared networks and neutral-host models supporting multiple operators.

Across these use cases, HAPS enhances continuity, expands reach, and strengthens reliability while operating in coordination with terrestrial and satellite layers.

The result is a coherent framework for a truly ubiquitous 6G network — one that integrates surface, stratospheric, and space assets into a unified, resilient system. As the paper makes clear, achieving a truly ubiquitous 6G society will depend on this integrated architecture rather than any single layer alone.

A Pivotal Layer in the 6G Fabric

The whitepaper ultimately positions HAPS as a central component of the 6G access network. Its wide-area coverage, relatively low latency, programmability, and neutral-host capabilities enable it to complement both terrestrial and satellite systems.

Released in March 2026, the whitepaper is intended for technical audiences in mobile connectivity, aerospace, and related audiences. It’s free to download, and no email is required.

Download the whitepaper >