Research on 5G and Radar in Lower 3 GHz Spectrum Band Supports Commercial Use

Today, August 15, CTIA released a fascinating short paper that makes the case for authorizing commercial use of the 3.3-3.45 GHz band at full power and on an exclusive licensed basis. The paper, "Successful Military Radar and 5G Coexistence in the Lower 3 GHz Band: Evidence from Around the World," summarizes research from GSMA, CCS Insight, and DLA Piper regarding the co-existence of 5G services with U.S. military radars in the lower 3 GHz band in foreign countries such as Germany, Japan, Mexico, South Korea, and Taiwan.

According to CTIA's paper:

This real-world evidence demonstrates how proven coordination methods are already facilitating simultaneous use of the band by 5G and military radars. Segmenting the band at 3.3 GHz with commercial wireless operating above and military radars tuning below can facilitate near-term coexistence. Coordination techniques—such as retuning, compression, and frequency coordination—provide assurance that 5G networks can be deployed in the U.S. at full power in lower 3 GHz spectrum while maintaining the ability to meet critical government missions that depend on radar systems.

The U.S. needs more mid-band spectrum for commercial use, particularly on an exclusive licensed basis, and to help meet those needs, Congress and the NTIA should prioritize the repurposing spectrum in the lower 3 GHz band. For more on this, see my February 2021 Perspectives from FSF Scholars, "Fast Action on the Lower 3 GHz Band Will Secure America's 5G Future." The coexistence of 5G and U.S. military radar operations in foreign countries identified in CTIA's paper persuasively favors repurposing the 3.3-3.45 GHz band for private commercial use. If 5G and military radar coexist in other countries, they can and should be made to coexist in the U.S. 

 

Also, in order to put lower 3 GHz band spectrum into the hands of private commercial providers of 5G services, the FCC's authority to conduct spectrum license auctions needs to be restored. The House of Representatives should promptly pass H.R. 3565 – the Spectrum Auction Reauthorization Act of 2023. If it becomes law, H.R. 3565 would restore that authority to the Commission.