Private 5G Networks in Factories: When It Makes Sense
Actualizado: 2026-05-03
Private 5G networks are the connectivity proposal for industrial environments that don’t want to depend on public operators or settle for Wi-Fi: high capacity, low latency, broad coverage, thousands of connected devices, and criticality slicing. After years of hype, there are real installations with measurable metrics. This article covers architecture, comparison with alternatives, costs, and when investment makes sense.
Key takeaways
- A private 5G network is radio + core operated by the enterprise on dedicated spectrum — not an operator “slice”.
- Private licensed spectrum (3.8-4.2 GHz in Spain) gives real independence vs. public-network slicing.
- Cases with proven ROI are large campuses with mobility, critical URLLC latency, or high IoT sensor density.
- Wi-Fi 6/7 remains the right choice for most medium-size plants with fewer than 50 mobile devices.
- Typical startup cost is €500k-2M for a medium plant; scarce talent is the most underestimated barrier.
What a Private 5G Is
A private 5G network is a radio + core deployment operated by the enterprise (or contracted provider) over dedicated spectrum. Three modalities:
- Private licensed spectrum: national allocations (Germany 3.7-3.8 GHz, Spain CPPRP 3.8-4.2 GHz). The company has exclusive rights.
- Shared spectrum: CBRS in US, opportunistic use.
- Public network slicing: a “virtual slice” within the operator’s network. Less independent.
For serious industry, private licensed spectrum is the preferred option.
Typical Architecture
Essential elements:
- Radio Access Network (RAN): antennas and radios distributed across the plant.
- Edge core: the 5G core (UPF, AMF, SMF) on-site or near-edge to minimise latency.
- SIM/eSIM management: manage device identities.
- IT/OT system integration: usually over VLAN or IP.
Cases Where Private 5G Shines
Scenarios with proven ROI:
- Autonomous vehicles in large campuses: AGVs, mine trucks, drones. <20ms latency and reliable handover are key.
- AR/VR for maintenance: augmented glasses with edge-served technical content.
- Large IoT sensor density: thousands per km². 5G scales better than Wi-Fi at high density.
- Mobile / outdoor plant: construction, ports, logistics over large areas.
- Redundancy and determinism: URLLC for critical control where packet loss is unacceptable.
Comparison with Wi-Fi 6/7
| Aspect | Private 5G | Wi-Fi 6/6E/7 |
|---|---|---|
| Range | Km (outdoor) | <100m typical |
| Latency | <20ms URLLC, <5ms ideal | 5-30ms variable |
| Per-cell capacity | Thousands of devices | Hundreds |
| Determinism | High (with slicing) | Limited |
| Handover | Robust between cells | Weak |
| Capex cost | High | Moderate |
| Enterprise experience | New | Mature |
Wi-Fi 6/7 remains the default for office and limited-industrial environments. Private 5G wins in broad outdoor coverage, high mobility, and critical determinism.
Open RAN: Lowers Entry Barrier
Open RAN reduces dependence on Nokia/Ericsson:
- Alternative providers: Parallel Wireless, Mavenir, Altran, dozens more.
- Interchangeable components: radio from one vendor, core from another.
- Lower cost with commoditised equipment.
- Challenge: more complex integration and operation.
When It DOESN’T Make Sense
Honestly:
- Plant with fewer than 50 connected devices: Wi-Fi 6 is more efficient.
- No real URLLC cases: if you don’t need <20ms latency, don’t pay the premium.
- No significant mobility: cable + Wi-Fi covers.
- No budget for sustained ops: 5G requires continuous expertise.
Conclusion
Private 5G networks are real and have cases where ROI justifies investment — mainly large campuses with mobility, URLLC cases, or high device density. For most plants, Wi-Fi 6/7 remains the right choice. The decision should be based on concrete needs, not hype. Companies adopting private 5G without clear cases find high capex and low return; those adopting for real needs get significant operational advantages.
