Global telecom bodies are moving toward a major shift in connectivity architecture by integrating satellites directly into mobile networks, with the goal of achieving near-universal geographic coverage.
The International Telecommunication Union (ITU) and the Global Satellite Operators Association (GSOA) have outlined a roadmap where future 6G systems (IMT-2030) will treat satellites as a native part of network infrastructure. While current mobile networks cover about 96% of the population, they reach only 20% of the Earth’s landmass, leaving large remote areas without reliable connectivity.
Direct-to-device connectivity enables standard smartphones to connect directly to Low Earth Orbit (LEO) satellites, removing the need for ground towers in difficult terrain. This marks a transition from limited emergency messaging to full-scale voice and data integration across space and terrestrial networks, expected to mature by 2030.
However, this shift introduces regulatory and technical challenges. D2D services rely on low-band spectrum already used by terrestrial networks, requiring new spectrum-sharing frameworks to prevent interference. Regulators have highlighted the need for cross-border coordination and adaptive licensing systems to support seamless global connectivity.
The development signals a transition toward hybrid communication systems, where satellites complement terrestrial networks to extend reach, improve resilience, and support new digital services.
Key Technical and Regulatory Highlights
Universal Reach: D2D aims to connect the "last 4% of humanity" and provide seamless service across oceans, mountains, and deserts.
LEO Reshaping: The number of active satellites has increased tenfold in a decade, moving signals from fixed orbits to numerous moving objects in LEO.
Spectrum Competition: D2D depends on access to low-band IMT spectrum, intensifying competition between traditional mobile operators and satellite providers.
Interference Management: New frameworks require active "spectrum-sharing" arrangements to protect existing terrestrial services and ensure consumers do not suffer call drops.
IMT-2030 Progress: 6G technical requirements build on the framework approved in 2023, focusing on ubiquity, economics, and capability.
Emergency Resilience: Beyond consumer voice and data, D2D enhances social resilience by providing a backup communication layer during terrestrial network failures or natural disasters.
What is "Direct-to-Device" (D2D) Connectivity?
Direct-to-Device (D2D) connectivity is a technology that allows a standard, unmodified mobile phone to link directly to a satellite in space instead of a ground-based cell tower.
Traditionally, satellite phones were bulky, expensive devices requiring a clear line of sight to a specific satellite. With D2D, the satellite essentially acts as a "cell tower in the sky." This is made possible by the rise of Low Earth Orbit (LEO) satellites, which are close enough to Earth to pick up the relatively weak signals from a regular smartphone, enabling coverage even in the middle of an ocean or a remote desert.
Policy Relevance
Eliminates Rural "Shadow Zones": For India, D2D offers a solution for "zero-bar" areas in the Himalayas, the North-East, and island territories where laying fiber or building towers is geographically and economically unfeasible.
Strategic Spectrum Policy: As TRAI and the Department of Telecommunications (DoT) prepare for 6G, the ITU’s focus on "low-band IMT spectrum reuse" will require India to draft new sharing rules between local telcos and global LEO operators.
Disaster Management Infrastructure: D2D provides a "hardened" communication layer for India’s Disaster Management authorities, ensuring connectivity during cyclones or floods when ground-based towers are often uprooted.
Blue Economy Growth: Providing 100% geographical coverage over the Indian Ocean enables real-time tracking and IoT connectivity for India’s shipping and deep-sea fishing fleets, boosting maritime safety and economic output.
Global Standard Leadership: By aligning with IMT-2030 requirements, India can ensure its domestic hardware and software startups are "satellite-ready" for the global 6G market.
Relevant Question for Policy Stakeholders: How should India design spectrum-sharing rules to allow satellite and mobile networks to operate together without degrading service quality?
Follow The Full News Here: ITU: Direct to Device Services Poised for the Leap to 6G