Private 5G is oversold and under-specified in roughly equal measure. The honest position is that it is the right answer for a specific and identifiable class of site, and an expensive answer everywhere else. The useful question is which side of that line a given operation falls on.
Three things Wi-Fi genuinely cannot do
Wi-Fi is cheap, familiar and entirely adequate for a warehouse with handheld scanners. It runs into hard limits in three places.
Mobility. Wi-Fi roaming between access points was designed for a person walking between meeting rooms. A straddle carrier moving at speed across a container terminal, or a haul truck crossing an open pit, generates handovers that Wi-Fi handles with an interruption. For control traffic, an interruption is a stop.
Deterministic latency. Wi-Fi is contention-based: performance degrades unpredictably as devices and interference increase. 5G schedules the air interface. When a crane’s anti-sway control or a remotely operated drill needs a latency figure it can rely on at busy hour, scheduled beats contended.
Outdoor coverage economics. Covering several square kilometres of yard, pit or field with Wi-Fi means a large number of access points, a large amount of backhaul, and a large amount of civil work. A handful of 5G cells in n78 or n41 covers the same area. At industrial scale, the cell count difference is the business case.
Where fibre is still the right answer
Nothing wireless beats fibre for fixed, high-bandwidth, latency-critical links between points that do not move. If the requirement is connecting fixed plant, cameras on fixed poles and a control room, fibre is cheaper and more reliable. Private 5G earns its cost when things move, when trenching is impractical or prohibited, or when the site layout itself changes — which describes most ports, most mines and most oil fields.
What a private 5G deployment actually contains
A complete private network is core, transport, radio and devices, not just radios.
- Core. A 5G standalone core with UPF, AMF, NRF, SMF, NSSF, UDM, NEF, AUSF and PCF — plus IMS if voice is required, and MANO for orchestration. In a network-in-a-box configuration, this ships with the RAN in a single unit.
- Radio. Macro or micro remote radio units, small-cell all-in-one units and antennas, in n41 or n78, TDD at 50, 80 or 100 MHz, connected over eCPRI.
- Synchronisation. GPS and 1588v2. In TDD, this is not optional and it is not an afterthought.
- Scale. Typical configurations run 1,000, 5,000 or 10,000-plus subscribers, up to 100 cells per box, with multiple boxes federated as the site grows.
- Devices. Industrial gateways and routers certified against the exact band and bandwidth deployed. This is the most commonly underestimated workstream.
- Edge computing and slicing. Keeping control traffic on site and separating it from bulk video.
Sector by sector
Ports. Automated cranes, AGVs and straddle carriers moving through a metal canyon of stacked containers. Coverage has to be planned around stacks that change daily, and control traffic must be sliced away from the CCTV load that will otherwise consume the uplink.
Mining. Autonomous haulage and remote operation across open pit and underground. Coverage design is a terrain problem; device selection is a vibration and dust problem; and the safety case usually drives redundancy requirements harder than the productivity case does.
Oil and gas. Remote fields, offshore assets and terminals where fibre is impractical and where sensor and telemetry backhaul at scale is the primary load. Hazardous-area certification governs device choice before anything else.
The deployable case
One configuration deserves a specific mention: private 5G on the wheel — a complete core-and-RAN network vehicle-mounted. For disaster response, temporary industrial sites, events, and civil defence or military deployment, it produces a working network in an environment that has no infrastructure at all. In a region with significant construction, energy and emergency-response activity across difficult terrain, this is a more practical proposition than it first sounds.
How to test your own case in an afternoon
Answer four questions honestly.
- Does anything that matters move across more than a few hundred metres?
- Is there an application where an unpredictable delay causes a stop, a safety event or a loss?
- Would trenching the same coverage be impractical, prohibited or repeatedly disturbed?
- Does operational data need to stay on site for security or sovereignty reasons?
Three or four yes answers means private 5G is likely the right architecture and the exercise is sizing it. One or two means you probably have a Wi-Fi or fibre problem with a 5G budget attached to it, and the honest advice is to spend less.