Private 5G Deployment: Proven Strategies from Leading Enterprises

Private 5G Deployment: Proven Strategies from Leading Enterprises

Private 5G—networks owned and operated by enterprises—has become a buzzword in the tech community. In a recent survey of 177 organizations, only three actually knew how to build a private 5G network, and they learned by doing.

These three pioneers identified a critical, often overlooked question: “What does it run on?”

5G Resources

• What is 5G? Fast wireless technology for enterprises and phones
• How 5G frequency affects range and speed
• Private 5G can solve some problems that Wi‑Fi can’t
• Private 5G keeps Whirlpool driverless vehicles rolling
• 5G can make for cost‑effective private backhaul
• CBRS can bring private 5G to enterprises

The 5G Control and User Planes: A Distinct Architecture

5G’s architecture is split into two stacks—RAN and Core—each with a control plane and a user plane. While the diagram may resemble an IP stack, the 5G user plane actually contains the IP control and data planes by inference, whereas the control plane is entirely new. Almost everyone can agree that 5G control‑plane functions in both RAN and Core are hosted on servers.

Four Key Rules for Private 5G

Rule 1: Treat private 5G as a user of your existing IP network, not an extension of it. Every site that hosts 5G cells or services must be on your corporate VPN, supported by the same switches and routers you already use.

Rule 2: Host all 5G control‑plane functions on servers. Place RAN and O‑RAN control‑plane elements close to the cells, and Core functions where private 5G traffic can be consolidated. Use consistent server hardware, middleware, and software, and enable high‑availability.

Rule 3: Host 5G RAN user‑plane functions on servers. In IoT scenarios, these functions can share the same servers as the control plane, since event‑based traffic is modest. For higher‑volume traffic, consider white‑box switches.

Rule 4: Host 5G Core user‑plane functions on white‑box switches. The Core typically handles more traffic, demanding higher capacity and low‑latency hardware. IoT applications without mobility might still use servers if traffic levels are low.

Two of the three adopters used white boxes for all user‑plane hosting, noting that for modest IoT traffic this may have been over‑provisioned. They expressed a preference for servers equipped with custom network adapters to accelerate traffic handling.

Choosing Hardware and Integrators

Start with 5G software that meets your feature and cost requirements. If the software vendor does not supply hardware, ask for an integrator recommendation. The integrator will design the deployment—identifying cell sites, backhaul needs, and the placement of white‑box switches and servers—and then map specific hardware to each location.

Open RAN Is Essential

The three pioneers and the broader sample of 177 enterprises agree that vendor lock‑in is unacceptable. Selecting an open‑model approach—O‑RAN compliant—ensures flexibility, allowing you to choose from multiple device candidates rather than a single vendor’s offering.

Deploying private 5G is a step far beyond conventional enterprise networking. All three adopters noted that Wi‑Fi 6 could have supported most IoT use cases, except for mobile sensors in transportation that rely on public networks. The influence of 5G vendors pushed upper management toward 5G, but the experience showed that starting with Wi‑Fi 6 and moving to private 5G only when necessary is the most cost‑effective path.

In short, a successful private 5G deployment hinges on understanding the underlying architecture, following clear hardware rules, and embracing open RAN for long‑term agility.