#CBRS
About #CBRS
CBRS (Citizens Broadband Radio Service) operates in the 3.5 GHz to 3.7 GHz frequency range, also known as Band 48, and has become one of the most important wireless technologies for modern WISPs. It enables Wireless Internet Service Providers to deliver reliable, high-speed fixed wireless broadband to rural, suburban, and underserved communities without the need for expensive fiber or cable infrastructure. By using shared mid-band spectrum, CBRS helps providers expand coverage faster while maintaining strong performance and scalability.
One of the biggest advantages of CBRS for WISPs is its shared-spectrum model. The 150 MHz of available spectrum is divided into three access tiers: Incumbent Access, Priority Access Licenses (PAL), and General Authorized Access (GAA). This tiered approach allows multiple users to efficiently share the same frequencies while protecting critical military and satellite operations. To coordinate spectrum usage, CBRS relies on a cloud-based Spectrum Access System (SAS), which dynamically manages channel assignments and helps minimize interference between networks. This automated coordination significantly improves spectrum efficiency and network stability compared to traditional unlicensed wireless systems.
The 3.5 GHz mid-band spectrum also provides an excellent balance between coverage range, signal penetration, and throughput. Compared to higher-frequency 5 GHz systems, CBRS signals can travel farther and penetrate obstacles such as trees, walls, and buildings more effectively, making it highly suitable for rural and suburban broadband deployments. At the same time, CBRS still supports high-capacity connections capable of delivering modern broadband speeds for residential, business, and enterprise customers.
WISPs deploying CBRS networks typically rely on 3GPP-based 4G LTE and 5G NR technologies. Several major vendors provide hardware and ecosystem support for CBRS deployments. Cambium Networks is well known for its LTE and fixed wireless solutions, including technologies designed to improve sector efficiency and scalability. Tarana Wireless has gained significant attention for its advanced Non-Line-of-Sight (NLOS) interference mitigation technology, helping operators deliver stable connectivity even in difficult RF environments. Larger-scale regional and carrier-grade deployments often utilize infrastructure from Cisco and Ericsson. In addition, companies such as CommScope and Federated Wireless provide SAS platforms that manage frequency coordination and regulatory compliance for CBRS networks.
Several leading WISPs across the United States have adopted CBRS technology to expand broadband access and improve network performance. Providers such as Nextlink Internet, Mercury Broadband, and Surf Internet use CBRS as part of their wireless infrastructure strategies to deliver broadband services in areas where wired connectivity is limited or unavailable.
For WISPs planning new deployments, upgrading existing infrastructure, or evaluating broadband expansion opportunities, CBRS offers a flexible and scalable solution capable of supporting modern fixed wireless networks. Network planning typically involves spectrum coordination, tower placement, subscriber density analysis, and SAS integration to maximize performance and minimize interference across the coverage area.
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Overview
CBRS (Citizens Broadband Radio Service) is a shared mid-band wireless spectrum operating in the 3.5 GHz to 3.7 GHz range (Band 48) that enables WISPs to deliver high-speed fixed wireless broadband without relying on traditional cable or fiber infrastructure. Using a cloud-managed Spectrum Access System (SAS), CBRS dynamically coordinates frequencies to reduce interference and improve network efficiency. Its mid-band frequencies provide an excellent balance of coverage, speed, and signal penetration, making it ideal for rural and underserved areas. Many WISPs use CBRS with 4G LTE and 5G technologies from companies such as Cambium Networks, Tarana Wireless, and Ericsson to expand reliable broadband access.