Addressing dead zones in traditional cellular networks, Viasat Inc. announced on July 16, 2026, a technology demonstration showcasing an automotive satellite voice call integrated into a BMW Group production-line vehicle platform.
Conducted in Munich, the trial established voice communications directly through the vehicle’s native electronics architecture using Non-Terrestrial Network (NTN) satellite connectivity.
The accomplishment brings 3rd Generation Partnership Project (3GPP) standards-based satellite capabilities into the software-defined vehicle (SDV) ecosystem. The technology provides continuous operational connectivity for emergency assistance, telematics, and voice services in rural, off-grid, or geographically remote regions where terrestrial LTE and 5G signals are unavailable.
Hardware Architecture and NB-IoT Voice Integration
The technical architecture relied on Viasat’s geostationary L-band satellite network to route narrow-band signals. Rather than utilizing external handheld satellite transceivers, the demonstration embedded satellite connectivity into the vehicle’s existing telematics control unit.
Key hardware and software components integrated during the Munich test included:
- Modem Platform: Qualcomm Technologies’ Snapdragon Auto 5G Modem-RF Gen 2 system, configured to handle non-terrestrial signal protocols alongside standard cellular frequencies.
- Voice Codec: Fraunhofer IIS’s NESC AI voice codec, tailored to compress analog audio into low-bandwidth data streams capable of real-time transmission over narrow-band channels.
- eSIM Management: Software-defined vehicle eSIM capabilities provided by Cubic Telecom (Cubic³), enabling dynamic network handovers between terrestrial cell towers and orbiting satellite beams.
- Protocol Standard: Narrowband Internet of Things (NB-IoT) over L-band satellite spectrum, enabling two-way messaging and compressed voice sessions without requiring high-power vehicular phased arrays.
This multi-component configuration allowed the driver to initiate and manage voice calls directly through the primary in-dash infotainment interface.
Industry Collaboration and Standards Validation
The trial builds upon earlier connected-vehicle research conducted by the 5G Automotive Association (5GAA), an industry consortium comprising automakers, telecommunications providers, and technology developers. While prior 5GAA field trials in mid-2025 successfully verified basic text-based eCall and SOS messaging over satellite links, the integration of an active voice codec within the vehicle’s native bus system demonstrates that low-rate satellite channels can sustain two-way audio communications.
By utilizing standard 3GPP Release 17 specifications for NB-NTN, automakers avoid installing proprietary satellite receivers or bulky rooftop antennas. The approach allows automotive original equipment manufacturers (OEMs) to standardize single telematics hardware architecture across global vehicle lines, relying on software configurations to activate satellite backup channels in regions with limited cellular coverage.
“This demonstration reflects broader industry excitement to ensure consistent, resilient satellite capabilities for next-generation vehicles,” said Sandeep Moorthy, Senior Vice President of Advanced Non-Terrestrial Solutions at Viasat. “By bringing standards-based NTN to vehicles, we can integrate satellite voice and messaging and ultimately enable a future where drivers can remain connected — wherever the journey takes them.”
Automotive NTN Roadmap and Expansion Scope
While initial commercial implementations focus on automated collision notifications, roadside assistance, and critical SOS voice channels, future developments under upcoming 3GPP Release 18 and Release 19 standards aim to incorporate 5G New Radio (5G-NR) over satellite.
This evolution is expected to expand vehicular satellite bandwidth, supporting background over-the-air (OTA) software updates, real-time fleet telematics, and seamless network handovers between terrestrial carriers and L-band orbital fleets. As software-defined vehicles increasingly depend on continuous data links for navigation and safety, satellite NTN integration offers automakers a reliable layer of network redundancy for global operations.
