Indoor positioning is not a single product category. BLE proximity, Wi-Fi positioning, UWB ranging, NFC taps and QR scans answer different questions and require different levels of user participation. A hybrid design is often sensible, but only when each component has a clear role.
Start with the decision the system must support
Indoor positioning is not a single technology. It is a category that covers several distinct signal and sensing methods, each with its own infrastructure demands, maintenance profile and behavioural characteristics. The most commonly deployed options in UK venues are Bluetooth Low Energy (BLE) beacons, Wi-Fi-based positioning, ultra-wideband (UWB), and passive triggers such as NFC tags and QR codes. In some settings, inertial navigation or computer vision supplement these, but they rarely operate as standalone solutions for general venue use.
The selection process starts from what the system must actually do in physical space. A museum needs to know which exhibit zone a visitor is standing near. A warehouse may need to locate a forklift to within a few metres. A retail queue-detection setup only needs to know roughly how many devices are lingering in a defined area. These are fundamentally different positioning problems, and they tend to favour different technologies.
A useful way to frame the decision is around three practical axes: the granularity of location required, the infrastructure you are prepared to install and maintain, and the experience you want for the person carrying the device. If the requirement calls for room-level or zone-level awareness and the venue already has a mobile app, BLE beacons are often the starting point. If sub-metre accuracy is essential and you control the devices being tracked, UWB warrants serious consideration. If the goal is simply to let a visitor pull up information at a fixed point, NFC or QR may be sufficient with no ongoing battery maintenance at all.
No technology delivers reliable accuracy figures without a measured environment. Manufacturer specifications describe ideal conditions. Real-world performance depends on building materials, ceiling height, footfall density, the number of transmitting devices in the space and how the receiving device is held or carried. The only responsible way to compare options is to test them in the actual venue, not on a datasheet.
Compare technologies by participation and operating burden
BLE Beacons
BLE beacons broadcast small packets at regular intervals. A smartphone or other receiver detects these broadcasts and estimates distance using the received signal strength indicator (RSSI). Because RSSI fluctuates with obstacles, body absorption and device orientation, beacon-based positioning is best suited to zone-level detection rather than precise point location. In a retail environment, this is often enough: triggering a notification when a shopper enters the footwear department does not require centimetre accuracy.
The infrastructure burden is moderate. Beacons need physical mounting, periodic battery replacement and an asset register to track which unit is where. Calibration in situ is essential if you intend to use RSSI values to infer distance. Interference from other 2.4 GHz sources, particularly Wi-Fi access points and Bluetooth audio devices, must be assessed during a pilot.
Wi-Fi Positioning
Wi-Fi positioning uses the existing access point infrastructure to estimate device location based on signal strength from multiple APs. In venues that already have dense Wi-Fi coverage, this can appear attractive because it avoids installing additional hardware. However, Wi-Fi positioning depends on the client device actively scanning, and the results vary considerably between operating systems and device models. It is generally less predictable than a dedicated beacon deployment for zone-triggered experiences, though it can be useful for coarse footfall analytics where individual precision is less critical.
Ultra-Wideband
UWB uses short pulses across a wide frequency band, enabling time-of-flight calculations that can deliver significantly more stable and precise positioning than RSSI-based methods. The trade-off is infrastructure cost and device requirements. UWB tags or UWB-enabled devices are needed on the tracked objects, and fixed anchors must be installed with clear line-of-sight to the coverage area. This makes UWB well suited to controlled environments such as warehouses, factories and logistics hubs where the organisation issues the tracked devices and can justify the anchor infrastructure. For visitor-facing applications in public venues, UWB is rarely practical at present because most visitors do not carry UWB-capable hardware that an app can reliably access.
NFC and QR Codes
Strictly speaking, NFC tags and QR codes are not positioning technologies. They do not locate a person in space; they identify a fixed point that a person chooses to interact with. For exhibit information, asset lookups and wayfinding checkpoints, that is often precisely what is needed. The infrastructure is cheap and there are no batteries to manage. The limitation is that the visitor must physically tap or scan, which means the system cannot initiate an interaction. In practice, many venues combine passive triggers at specific points with beacon-based zone detection for broader awareness.
Match the technology to the venue and user journey
- Retail spaces: BLE beacons for zone-based notifications and dwell analytics; QR codes for product-specific landing pages where app adoption is low.
- Museums and galleries: BLE beacons for automatic audio-guide triggering by zone; NFC at individual exhibits for visitors who prefer a tap interaction.
- Events and conferences: Temporary beacon deployments for session-zone notifications; QR codes for schedule access and lead capture, since infrastructure must be removed after the event.
- Warehouses and industrial sites: UWB for asset and personnel tracking where sub-metre accuracy justifies the cost; BLE for broader zone monitoring where UWB anchors are impractical.
- Hospitals and large public buildings: Wi-Fi positioning for anonymised footfall analytics where installing beacons across a sprawling estate is operationally difficult; beacons for targeted wayfinding in high-traffic corridors.
Pilot the complete journey before committing
Reject accuracy claims without a measured acceptance test
A common error is selecting a technology based on a stated accuracy figure without testing it in the actual environment. A beacon manufacturer may quote a range of one to three metres under controlled conditions. In a Victorian building with dense brick walls and metal-framed glass partitions, the observed zone boundaries may be far less consistent. Always run a measured pilot in the space before committing to a full deployment.
Ignoring the Maintenance Burden
Every active transmitter requires ongoing attention. Batteries deplete, units fail, fixtures loosen and firmware needs updating. A deployment of two hundred beacons across a multi-floor museum represents a non-trivial maintenance schedule. If the operations team does not have capacity to monitor battery levels, replace units on a rolling basis and keep the asset register current, the system will silently degrade. NFC and QR alternatives avoid this burden entirely but sacrifice the ability to detect presence without a deliberate visitor action.
Assuming Uniform Device Behaviour
BLE scanning behaviour differs between iOS and Android, between phone models, and between foreground and background states. An app that reliably detects beacons on one device may behave differently on another. Wi-Fi scanning intervals vary by operating system and power-saving settings. Any technology selection should include testing across the device mix that your actual visitors or staff carry, not just the test phones the integrator brings on site.
Neglecting Interference During Planning
2.4 GHz spectrum congestion is a practical problem in most indoor environments. Wi-Fi access points, Bluetooth speakers, microwave ovens in catering areas and neighbouring businesses' equipment all contribute. A site survey that logs RF activity during operational hours, not just during a quiet walk-through, is a basic prerequisite. UWB operates in a different band and is far less susceptible to this problem, which is one reason it performs more consistently in industrial settings.
Privacy and Compliance Gaps
Positioning systems that track individual devices raise obligations under UK data protection law. Even if the system uses randomised MAC addresses, the combination of location traces over time can constitute personal data in certain contexts. The technology choice affects the privacy profile: passive NFC and QR interactions are initiated by the user and generate a narrower data trail than continuous beacon scanning. Whatever technology is selected, the privacy implications should be assessed before deployment, not after. Current ICO guidance on location data and privacy notices should be consulted as part of this process.
Key Checks Before Committing
- Has a site survey been conducted during normal operating hours to characterise RF conditions?
- Has a pilot been run in the actual space with representative devices, not just integrator test hardware?
- Is there a documented process for battery monitoring, replacement and asset register updates?
- Have interference sources been identified and their impact on the chosen technology assessed?
- Does the operations team have clear responsibility and capacity for ongoing maintenance?
- Has a data protection assessment been completed for the chosen approach, considering what data is collected, how long it is retained and whether individual tracking occurs?
- Is there a clear exit strategy if the technology does not perform as expected after the pilot?
- Have the differences in device and operating-system behaviour been tested across the visitor device mix?
The right indoor positioning technology is the one that matches the physical constraints of the venue, the granularity the use case actually requires, and the maintenance capacity of the team that will keep it running. Once those factors are clear, the selection tends to narrow considerably.
Selection matrix
| Need | Likely starting point | Main caveat |
|---|---|---|
| Deliberate access to content at a known point | NFC or QR | Requires a tap or scan and accessible placement |
| Zone awareness for an installed app | BLE beacons | Permissions, radio variation and maintenance |
| High-precision ranging between supported devices | UWB or supported Bluetooth Channel Sounding | Endpoint compatibility and cost |
| Venue-wide positioning using existing infrastructure | Evaluate Wi-Fi and hybrid approaches | Capability varies by infrastructure and client access |
