An interesting market quirk is creating a unique opportunity for homelabbers: CBRS (Citizens Broadband Radio Service) LTE small cells are hitting the secondary market at remarkably low prices.

This equipment glut stems from the economic challenges of two highly visible decentralized wireless projects. These Web3 models struggled because of a fundamental reality in cellular networking: phones don’t like to switch carriers. Unlike Wi-Fi, where your phone actively scans and jumps to known SSIDs, a cellular modem is designed to stay loyal to its “Home” network (the PLMN on your SIM card). The phone typically won’t even look for another network unless the home signal is lost—making the seamless, decentralized “offloading” these projects promised a massive technical hurdle.

🏠 The Homelab Core: Open5GS I’m using this hardware to build a private, standards-compliant network. The heart of the setup is Open5GS running on my homelab servers. • Open5GS is Free and Open Source: It’s a powerful C-language implementation that provides the critical intelligence layer for both 4G EPC and 5G Core functions without licensing fees. • Standards-Centric: It enables maximum interoperability with these CBRS radios. • (Note: While Magma Core is a great edge-focused alternative, Open5GS offers the most direct path to a pure 3GPP standards lab.)

🏗️ Infrastructure: Doing More with Less A major advantage of CBRS is infrastructure efficiency. Because cellular radios handle weak signals better and operate at higher power than Wi-Fi, a single CBRS small cell can often provide the same coverage as 10 to 15 Wi-Fi access points. For a large facility, this means significantly less cabling, fewer mounting points, and lower maintenance costs.

🏥 Precision and Privacy This is why private cellular will dominate critical sectors like Healthcare. Unlike Wi-Fi, where devices compete for airtime (CSMA/CA), LTE and 5G use scheduled access.

The radio tells every client exactly when to transmit. This coordination eliminates collisions, guaranteeing the deterministic timing and ultra-low latency needed for: • Real-time patient monitoring. • High-definition surgical imaging. • Autonomous medical robotics.

While medical-grade products will take years to mature, the foundation for secure, high-efficiency, and deterministic wireless is being laid right now in labs like this.

Picture credit from me, 10 years ago in Dover,NH.