WiFi 6 and WiFi 6E have closed the performance gap with cellular significantly. In the right environment, WiFi 6E delivers sub-5ms latency and multi-gigabit throughput. But "the right environment" is not a large industrial site. This comparison explains why private 5G and WiFi 6 are not competing for the same problem — and when each is the correct answer.
Performance numbers are for realistic industrial deployments, not theoretical peak values in ideal RF conditions.
| Parameter | Private 5G NR (SA) | WiFi 6 (802.11ax) | WiFi 6E (6GHz band) | Advantage |
|---|---|---|---|---|
| Spectrum type | Licensed (dedicated) | Unlicensed (shared) | Unlicensed (shared) | 5G |
| User plane latency | 1–10ms (URLLC capable) | 2–10ms (ideal conditions) | 2–8ms (ideal conditions) | 5G (deterministic) |
| Latency in industrial RF env. | 1–10ms (consistent) | 10–50ms+ (interference) | 5–20ms (better than 2.4/5GHz) | 5G by wide margin |
| Peak throughput (single device) | Up to 4 Gbps | Up to 9.6 Gbps (8x8 MIMO) | Up to 9.6 Gbps | WiFi higher peak |
| Roaming/handoff latency | <1ms (5G NR handoff) | 50–200ms (typical) | 50–150ms | 5G |
| Device density (per AP/cell) | ~1,024 devices/cell | ~50–100 active devices/AP | ~50–100 active devices/AP | 5G |
| Coverage range (outdoor) | Up to several km (sub-1GHz) | ~100–300m typical | ~50–150m (6GHz attenuates faster) | 5G |
| Coverage range (indoor) | ~100–300m per small cell | ~50–150m per AP | ~30–80m (poor wall penetration) | 5G |
| Security (device authentication) | SIM-based (3GPP AKA) | Password/certificate (WPA3) | Password/certificate (WPA3) | 5G |
| QoS enforcement | Per-flow, per-slice, guaranteed | Best-effort (EDCA, 4 queues) | Best-effort (EDCA) | 5G |
| Network slicing | Native (3GPP Release 15+) | Not supported | Not supported | 5G |
| Hardware cost per coverage unit | $5,000–$80,000/cell | $500–$3,000/AP | $600–$4,000/AP | WiFi |
| Device ecosystem | Growing (industrial devices) | Extremely broad | Broad (newer standard) | WiFi |
| Typical enterprise IT use | Less common | Universal | Growing | WiFi |
This single difference explains why private 5G and WiFi have such different performance profiles in industrial environments — and why the performance gap is wider in real deployments than specifications suggest.
In a commercial office building with controlled RF environments, WiFi 6E performs excellently. On a manufacturing floor with dozens of electric motors, welding equipment, automated conveyor systems, and steel infrastructure — all generating RF noise — unlicensed spectrum behaves very differently from lab specifications.
WiFi uses CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) — a "listen before you talk" protocol. When a device wants to transmit, it waits for the channel to be clear, then waits a random backoff period before transmitting. Under heavy load or interference, this backoff can introduce latency of 10–50ms or more. For an AMR waiting for a control command, or a SCADA RTU waiting to transmit a status update, this non-deterministic latency is a safety and reliability concern that no amount of QoS configuration can fully eliminate.
For stationary devices — desktop computers, fixed sensors, mounted cameras — WiFi 6 performs well. The problems emerge with mobile devices: AMRs moving at 2–6 m/s across a warehouse floor, forklifts traversing a large distribution centre, or vehicles moving through an industrial yard.
WiFi handoff (roaming from one AP to another) involves the device discovering and authenticating to a new AP. Even with 802.11r (Fast BSS Transition), the handoff process typically takes 50–100ms. During this window, the device is effectively disconnected. For a robot that needs a control signal every 10ms, a 50–100ms connectivity gap is a safety incident or an emergency stop event.
5G NR handoff (X2/Xn handover) is designed for mobile operation at vehicle speeds. The handoff is network-initiated rather than device-initiated, uses a make-before-break mechanism, and completes in under 1ms in well-designed deployments. The device maintains continuous connectivity through the handoff — there is no gap.
802.11r (Fast BSS Transition) reduces WiFi handoff from 200–400ms to approximately 50–100ms. 802.11k (Radio Resource Management) helps devices find the best AP to roam to. 802.11v (BSS Transition Management) allows APs to suggest transitions. Together, these reduce WiFi roaming latency substantially — but not to the <1ms of 5G NR handover, and not to the guaranteed performance required for robotic control systems.
Private 5G uses SIM-based authentication — every device has a SIM or eSIM containing cryptographic credentials specific to your private network. Authentication uses the 3GPP AKA (Authentication and Key Agreement) protocol. A device without a valid SIM provisioned for your network cannot connect, period. There is no password to compromise, no certificate to misconfigure.
WiFi 6 uses WPA3 (WiFi Protected Access 3) with either password-based (SAE/Dragonfly) or enterprise (802.1X EAP) authentication. Both are strong when properly configured, but both introduce attack surfaces — weak passwords, certificate management errors, rogue AP attacks — that do not exist in SIM-based cellular authentication.
For industrial OT environments under NERC CIP, IEC 62443, or other critical infrastructure security frameworks, the SIM-based authentication model of private 5G often provides a cleaner compliance path than WiFi enterprise authentication, particularly where a large number of IoT devices need to be managed.
Many real-world deployments use both technologies in a complementary architecture: private 5G for the plant floor, yard, and outdoor areas where mobility, interference, and coverage range matter; WiFi for the office, control room, and fixed IT devices where cost efficiency and device ecosystem are the priority.
Technical reference pages across the Private5G.ca library.
A site assessment will map your RF environment, mobility requirements, and use cases to the right wireless architecture — whether that is private 5G, WiFi, or a combination of both.