Ultra-Breitband (UWB) – wie es funktioniert und wo es passt.
Ultra-Wideband is the dominant precision-indoor-positioning technology of the last decade. It delivers centimetre-accurate position in environments where every other radio struggles.
This is the operator-level explainer of how UWB actually works, when it wins, and where alternatives fit better.
Die 30-Sekunden-Definition
Ultra-Wideband (UWB) is a low-power, short-pulse radio that measures the precise time a signal takes to travel between two devices, and from that timing calculates the distance — and ultimately the position — to within 10–30 cm.
The defining characteristic is the bandwidth: UWB uses signals over 500 MHz wide, which is what makes the timing precise enough to measure distance directly rather than estimating it from signal strength like BLE or Wi-Fi do.
The relevant standards are IEEE 802.15.4z (high-rate pulse) and the FiRa Consortium's interoperability profiles.
Wie UWB Ranging eigentlich funktioniert
There are two common ranging techniques. Two-Way Ranging (TWR): a tag sends a pulse to a fixed anchor; the anchor sends a response; the round-trip time, minus protocol overhead, gives the distance — at sub-nanosecond timing precision.
Time-Difference-of-Arrival (TDoA): a tag transmits a pulse; multiple synchronised anchors record the exact moment of arrival; the differences in arrival times between anchors triangulate the tag's position.
TDoA scales better for many tags (the tag only transmits, doesn't have to wait for replies), TWR is simpler for small deployments. Most enterprise systems use TDoA with anchor synchronisation in the nanoseconds.
Wo UWB die richtige Antwort ist
Anywhere you need centimetre-class precision in challenging RF environments: automotive plants tracking parts on metal racking; aerospace MRO tracking tools and FOD;
tactical training in kill-houses where every operator's position matters; sports performance tracking in arenas where GPS doesn't work; collision-avoidance between forklifts and pedestrians where false alarms ruin adoption.
UWB tolerates multipath better than narrowband radios, works through normal building materials, and updates many times per second. If 5-metre Wi-Fi positioning isn't good enough, UWB is the next step up.
UWB gegen die Alternativen
UWB vs BLE-AoA: similar use cases at the low-accuracy end (1–2 m), but UWB pulls ahead below 50 cm and in dense multipath.
BLE-AoA usually wins on tag battery life (years) versus UWB (months to a year depending on update rate). UWB vs RAIN RFID: completely different — UWB tracks real-time position, RFID confirms presence at read points.
Most enterprises use both. UWB vs Wi-Fi RTT: Wi-Fi RTT can hit metre-level accuracy on supported devices but is constrained by AP-firmware support; UWB has more mature deployment ecosystem.
UWB vs GNSS: GNSS for outdoors, UWB for indoors — they're complementary, not competitive.
Ehrliche Einschränkungen
Three pain points are real. Cost per anchor: UWB infrastructure is more expensive than BLE — typically several hundred Euros per anchor, multiplied across a site that may need dense coverage.
Tag battery life: active-RF transmission consumes power; high-update-rate (sports, tactical) tags last weeks to months, lower-rate (asset tracking) tags last a year or two.
Battery management at scale is real operational overhead. Anchor synchronisation: TDoA requires nanosecond synchronisation between anchors, usually via wired backbone or dedicated wireless sync. Site design is non-trivial and needs an RF site survey before commitment.
Anbieter- und Ökosystemlandschaft
Drei Schichten zählen. Silicon: Qorvo (acquired Decawave, the original UWB silicon company) and NXP are the dominant UWB chip suppliers, plus more recently Apple's U1/U2 silicon and Samsung's UWB.
Infrastructure and platform: Ubisense, Sewio, Pozyx, Litum and (BLE-AoA-adjacent for some use cases) Quuppa.
Standards: FiRa Consortium for interoperability, plus IEEE 802.15.4z for the underlying spec. For enterprise procurement, the decision is rarely about silicon — it's about which platform fits your environment, which we evaluate during stage 1 with an RF site survey.
Wo TRACIO UWB empfiehlt
Use cases requiring sub-metre accuracy with real-time update rates: WIP and parts tracking in manufacturing (especially metal-rich); tool control and FOD prevention in aerospace MRO; tactical and force-on-force training;
precision athlete tracking; forklift-pedestrian collision avoidance with tight zone tuning; high-value or moving asset tracking in healthcare, defence, oil-and-gas (with ATEX/IECEx hardware).
We don't recommend UWB for zone-level visibility where BLE would suffice, for outdoor applications where GNSS fits better, or for presence-only use cases where RAIN RFID is cheaper and simpler.
Häufig gestellte Fragen
Wie genau ist UWB in der Praxis?
10–30 cm at the 95th percentile in well-designed deployments. Real-world accuracy depends entirely on anchor placement, density, synchronisation quality, and environment. We validate accuracy in a pilot at production load as a gate-2 criterion in /method.
Funktioniert UWB durch Wände und Hindernisse?
UWB penetrates most building materials (drywall, wood, glass) reasonably well but is attenuated by concrete and metal.
The standard mitigation is anchor density — more anchors with overlapping coverage compensate for obstructed direct paths. A predictive RF site survey at gate 1 sizes anchor count.
Wie lange halten UWB-Tags auf einer Batterie?
Depends on update rate. High-rate tags (5–10 Hz for sports, tactical) last weeks to months on a coin cell or small lithium.
Asset-tracking tags at 1 Hz or sub-Hz last 1–3 years. Industrial worker badges typically rechargeable. We size battery strategy at gate 1 with the use case in mind.
Ist UWB herstellerübergreifend kompatibel?
Das Tag-to-Anchor-Protokoll ist größtenteils herstellerspezifisch, trotz der Arbeit der IEEE- und FiRa-Standards. In der Praxis binden Sie sich pro Implementierung auf das Tag-and-Anchor-Ökosystem eines Anbieters ein.
Mehrfachanbieter-UWB-Flotten entstehen, sind aber noch nicht im Mainstream. Wir gestalten die Lieferantenbindung an Gate 1 sorgfältig.
Hilft hier der UWB-Chip meines Smartphones?
Mostly no, for enterprise asset tracking. Apple U1/U2 and Samsung UWB are designed for short-range device-to-device interactions (AirTags, secure car-key, file sharing).
The chips are technically compatible with FiRa, but the application ecosystem for enterprise positioning on consumer devices isn't there yet.
Wie integriert sich UWB in unsere Unternehmenssysteme?
Moderne UWB-Plattformen stellen Positions- und Ereignisdaten über REST-APIs, MQTT und OPC UA bereit. Die Integration in WMS / MES /EMR ist konzeptionell unkompliziert, aber in der Praxis immer nicht trivial – siehe /integrationen für unsere Enterprise-Integrationsmuster.
Zuletzt aktualisiert: