UWB vs RFID — quand chacun gagne.
UWB and RFID get pitched against each other in procurement, but the honest answer is that they're built for different jobs.
UWB tracks real-time position for a relatively small fleet of active tags; RFID confirms presence at read points for thousands of passive tags. This is the operator-level comparison that helps you choose — or, more often, lay out where each belongs in a hybrid stack.
La différence de catégorie
UWB (Ultra-Wideband) uses time-of-flight measurements between active battery-powered tags and ceiling-mounted anchors to deliver 10–30 cm real-time position with multi-Hz update rates.
RFID (RAIN UHF Gen 2) uses passive tags that backscatter their ID when a reader transmits — confirming presence within the reader's field.
UWB tells you where a thing is right now to centimetres. RFID tells you that a thing was here when the reader fired. Most enterprises that compare them at procurement end up needing both for different parts of the operation.
Précision — d’un ordre de grandeur
UWB: 10–30 cm at the 95th percentile in production deployments. RFID: presence confirmation within the reader's read zone (a few metres for handhelds and fixed portals), or 1–3 m for newer RTLS-grade RFID (Zebra ATR7000, RF Controls CISC).
UWB is roughly 10× more accurate than RTLS-grade RFID, and 100× more accurate than basic portal RFID.
If sub-metre precision matters for your use case (collision avoidance, kit assembly, tactical training), UWB. If presence is enough (cycle counts, dock-door reconciliation), RFID.
Étiquette économie — le facteur décisif de l’échelle
RFID tags: 3–10 cents for retail inlays, 50 cents to a few Euros for industrial, no batteries, multi-year life. UWB tags: 30–150 Euros each, with battery management overhead.
If you need to track 100,000 garments, items or returnable assets, the tag cost difference is the entire procurement decision — RFID wins by orders of magnitude. If you're tracking 200 high-value pieces of work-in-progress in real time, UWB tag cost barely registers.
Coût et densité des infrastructures
UWB anchors: several hundred Euros each, deployed at ~10 m spacing in 3D, wired backbone for synchronisation. A typical 5,000 m² production area needs 30–60 anchors.
RFID fixed readers: similar per-reader cost but deployed only at chokepoints (dock doors, smart cabinets, encoding stations) — a comparable site might need 5–15 readers.
Mobile RFID: zero fixed infrastructure, just handhelds. The infrastructure cost gap matters most for sites where chokepoint reads work; UWB only wins where you genuinely need continuous spatial coverage.
Taux de mise à jour et latence
UWB: multi-Hz to 50 Hz update rates, real-time position. RFID: presence events when items enter a reader's field, no continuous tracking.
For dynamic processes (forklift collision avoidance, sports performance, autonomous-asset interactions), UWB is the only option. For event-driven processes (receiving, picking, shipping), RFID's event model fits perfectly.
Les stacks hybrides sont la norme
Most large enterprises run both. Examples: an automotive plant uses UWB for WIP tracking on the line (sub-metre needed) and RFID for parts kits at receiving (cheap, bulk reads);
an aerospace MRO facility uses UWB for tool location during work and RFID at smart cabinets for check-in/out; a hospital uses BLE-AoA for staff and equipment workflow and RFID for consumable inventory.
Hybrid is the default outcome at scale — the procurement question is not which, it's where each fits.
Quand TRACIO choisit UWB vs RFID
UWB: collision avoidance, tactical training, sports performance, sub-metre WIP, real-time tool tracking, kit assembly verification, force-on-force training.
RFID: retail item-level, warehouse dock-door reconciliation, pharma serialisation, smart cabinets, tool control, returnable-asset (RTI) tracking, high-value inventory at scale.
We scope the mix in stage 1 of /method based on use cases, not technology preference. See /insights/uwb-explained and /insights/rfid-explained for the deeper individual treatments.
Questions fréquemment posées
UWB et RFID peuvent-ils coexister sur la même infrastructure ?
Yes — they operate on different frequencies (UWB sub-GHz to 10 GHz wideband; RAIN RFID at 860–960 MHz) and don't interfere. Many deployments share cabling backbone, network controllers and integration platforms. We design hybrid stacks as a normal output of stage 1.
Lequel est globalement le moins cher à déployer ?
RFID à grande échelle, de loin, quand la présence est suffisante. UWB a des coûts d’indexation, d’ancrage et d’intégration plus élevés mais offre une position en temps réel que RFID ne peut pas.
La bonne mesure est le coût par résultat commercial, pas le coût par étiquette — nous modélisons les deux lors de l’étape 1.
Le RTLS -grade RFID (ATR7000, RF Controls) est-il un substitut au UWB ?
Sometimes. For 1–3 m real-time position on passive tags, RTLS-grade RFID is a strong UWB alternative — especially at scale where tag economics dominate. For sub-metre accuracy, UWB still wins. See /insights/rfid-explained for the RTLS-grade RFID detail.
Peut-on commencer par RFID et ajouter UWB plus tard ?
Oui, et c’est souvent la bonne séquence. RFID offre un retour sur investissement plus rapide sur la précision des stocks et la conciliation des points d’étranglement ;
UWB est ajouté plus tard pour les quelques processus à forte valeur ajoutée qui nécessitent une position en temps réel.
Les déploiements par phases sont des sorties de porte 1 de /méthode.
Comment l’histoire de l’intégration se compare-t-elle ?
Les deux exposent les événements aux systèmes d’entreprise via des API standard (MQTT, REST, OPC UA). RFID en WMS / ERP / EPCIS ; UWB vers MES / systèmes de plancher d’atelier / plateformes de sécurité contre les collisions. Voir /integrations pour nos modèles d’entreprise.
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