NASCTN Validated CBRS Spectrum Sharing Models

The network measured spectrum usage over two years to protect federal incumbent systems in the CBRS band.

Updated on Sept. 23, 2026 in Current Conditions

Isometric editorial illustration showing a radio antenna tower and stylized transmission blocks, symbolizing the management of wireless frequency spectrums. — The National Advanced Spectrum and Communications Test Network has validated new spectrum-sharing models, providing a technical framework to balance commercial wireless growth with critical federal security requirements. AI Illustration. Upload story photo >

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The National Advanced Spectrum and Communications Test Network (NASCTN) has validated its spectrum-sharing models against real-world field data collected in the CBRS band. These findings aim to ensure efficient spectrum utilization while maintaining protection for critical federal incumbent systems.

Why it matters

Accurately validating these models is essential for managing the 3550-3700 MHz frequency range, where commercial activity must coexist with sensitive federal systems. The results provide a technical foundation for balancing increased commercial spectrum demand with national security requirements.

The study analyzed the 3550-3700 MHz CBRS band using 4,767 sensor days of data collected over two years. Researchers utilized this volume of data to evaluate the accuracy of both CBRS 1.0 and CBRS 2.0 reference algorithms.

The players

National Advanced Spectrum and Communications Test Network

This organization operates the CBRS Sharing Ecosystem Assessment program to test and validate radio frequency communication standards.

Defense Information Systems Agency

This combat support agency is a key sponsor of the project and manages critical federal communications systems.

NIST

The National Institute of Standards and Technology provides the scientific framework and public validation for technical standards.

The details

NASCTN deployed specialized measurement instruments across Norfolk, Virginia, San Diego, California, and Camp Pendleton to track real-world radio environments. By summing energy contributions from registered commercial devices, the project compared actual sensor recordings against predicted model outcomes to verify system reliability.

The sensor network collected data over a 2-year period.
NIST published the final validation findings on September 23, 2026.

Seasonal Patterns

The validation findings contribute to the ongoing goals defined by the Spectrum Science Roadmap. This research follows the roadmap's mandate to develop standardized aggregate emissions definitions and environment sensing protocols.

These validated models improve the reliability of wireless connectivity by reducing interference risks for both military and commercial users. As the framework evolves, stakeholders and telecom operators should monitor the implementation of new standards to ensure compliance with updated federal sharing protocols.

The takeaway

Validating spectrum sharing technology is a critical step in managing the nation's finite airwaves for both commercial innovation and defense. Future developments in this space will likely focus on harmonizing emissions standards to further optimize wireless bandwidth utilization.