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Wi-Fi positioning.
Indoor location on the
network you already own.

Wi-Fi turns the access points across your site into a location layer - great coverage, no new hardware. And it pairs naturally with BLE when you need tighter accuracy for indoor positioning.

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What is Wi-Fi positioning?

Canonical definition

Wi-Fi positioning is a technology that locates devices and people indoors using the wireless signals of existing Wi-Fi access points, where GPS cannot reach. A location engine measures signal strength between a device and several access points - and matches it against a radio map of the site - to estimate real-time position, typically to room or zone level across large buildings without new hardware.

At a glance
What

Wi-Fi positioning (Wi-Fi location, Wi-Fi RTLS) locates devices and assets indoors using Wi-Fi signals.

How

A device is seen by several access points; an engine computes position from signal strength (RSSI) and fingerprinting.

Why not GPS

GPS satellite signals don't reach reliably indoors. Wi-Fi already blankets most buildings, making it a natural alternative.

Why hybrid

For tighter accuracy and RTLS, Wi-Fi is often combined with BLE on the same access points.

How it works

How Wi-Fi positioning works

A device is seen by several access points, and the location engine turns those signal measurements into a position - using signal strength and a radio map of the site.

1-2The Wi-Fi scan

A smartphone or Wi-Fi tag sees the access points around it, or is seen by them. Each measurement captures how the signal arrives from several fixed points at once.

3Signal strength (RSSI)

The key input is RSSI - received signal strength. The closer a device is to an access point, the stronger the signal, which lets the engine estimate distance.

4Trilateration & fingerprinting

Trilateration solves position from estimated distances to several APs. Fingerprinting matches the live signal pattern to a pre-surveyed radio map of the site - often more robust in complex indoor spaces.

5-6Position, then action

The output is a live location on the floor plan, driving navigation, dashboards and your systems through an SDK and API.

Key components

The components of a Wi-Fi positioning system

Most of them you already own - which is exactly what makes Wi-Fi positioning fast to deploy.

Access points

01

The Wi-Fi APs across your site double as the positioning infrastructure. Cisco, HPE Aruba and Fortinet access points are supported - no dedicated sensors required.

Smartphones

02

Every phone already has Wi-Fi, so visitors and staff can be located - or navigate - through an app, with no extra device to hand out.

Wi-Fi tags

03

For assets that aren't phones, a Wi-Fi tag broadcasts to the same access points. Battery use is higher than BLE, a factor for large mobile fleets.

Location engine

The core

The software that turns signal measurements into a reliable position. Accuracy depends far more on the engine's algorithms - trilateration, fingerprinting, filtering and calibration - than on the raw Wi-Fi hardware.

Dashboard & APIs

05

The layer that delivers location as usable data - ready dashboards, or an open API and SDK to embed positioning in your own apps and business systems.

Accuracy & performance

How accurate is Wi-Fi positioning?

Wi-Fi positioning has evolved from simple signal-strength systems to hybrid approaches. Here are the main methods and the accuracy each realistically delivers.

Types of Wi-Fi positioning

Signal strength

RSSI5-10 m

Estimates distance from how strong the signal is at each access point. Simple and universal, but sensitive to obstacles.

Fingerprinting

RF map3-8 m

Matches live signals to a pre-surveyed radio map of the building. More robust in complex layouts, but needs calibration and upkeep.

Time of flight

802.11mc / RTT1-3 m

Measures round-trip time between device and AP. Tighter accuracy, but requires compatible access points and devices.

Hybrid

Wi-Fi + BLE1-5 m

Combines Wi-Fi coverage with BLE precision on the same infrastructure - the approach behind most high-performing modern deployments.

Realistic precision levels

Room-level

Which room or area

Robust and enough for many navigation and presence use cases.

Zone-level

Which zone in a space

Finer visibility for occupancy and flow within larger spaces.

A few metres

Approximate position

Typical for Wi-Fi; tighter needs are met by adding BLE.

What influences accuracy

Access point densityMore APs per area gives tighter, more consistent accuracy.
Walls & materialsConcrete, metal and glass reflect and absorb signals.
Radio interferenceOther 2.4 / 5 GHz systems in the environment add noise.
Number of usersHeavy network load can affect measurement quality.
CalibrationThe radio map must be maintained as the building changes.
Advantages & limits

What Wi-Fi positioning does well - and where it stops

An honest picture. Wi-Fi is an excellent coverage layer, but it has real limits that shape when to pair it with BLE.

Advantages
  • Reuses your existing networkThe access points are already there, so there's little to buy.
  • Minimal extra infrastructureNo dedicated sensor grid to design and install across a site.
  • Fast to deployPositioning is added onto infrastructure that's already live.
  • Great coverage on large sitesWherever Wi-Fi reaches, positioning can follow.
Limits
  • Lower accuracy than BLE or UWBTypically a few metres, versus 1-5 m for BLE or sub-metre for UWB.
  • Higher device power drawWi-Fi tags drain faster than low-power BLE beacons.
  • Depends on network qualityAccuracy is tied to AP density, load and health.
  • Harder for some real-time usesFast, continuous tracking can strain a Wi-Fi-only setup.

The takeaway: Wi-Fi's strengths - coverage and existing infrastructure - and BLE's strengths - accuracy, low power and RTLS - are complementary. That's why the strongest deployments combine both. See BLE.

Technology comparison

Wi-Fi vs BLE vs UWB

Wi-Fi, BLE and UWB solve different parts of the same problem. Here's how Wi-Fi compares - and why the best answer is often not one technology, but two.

Wi-Fi vs BLE

Criterion
Wi-Fi
BLE
Accuracy
3-8 m
1-5 m
Cost
Low (existing APs)
Low (tags + APs)
Tag battery
Shorter
Years
Deployment
Very fast, no tags
Fast, tags on assets
Maintenance
Network-dependent
Battery replacement
Ideal for
Coverage, navigation
Precise RTLS, assets
Verdict

Use Wi-Fi for broad coverage and smartphone navigation with zero new hardware. Choose BLE when you need tighter accuracy, long tag battery life and true RTLS - which is why they're so often combined.

See BLE full page

Wi-Fi vs UWB

Criterion
Wi-Fi
UWB
Accuracy
3-8 m
10-30 cm
Infrastructure
Existing APs
Dedicated anchors
Cost
Low
High
Scalability
Site-wide, easy
Zone-by-zone
Ideal for
Large-site coverage
Sub-metre zones
Verdict

Wi-Fi scales across a whole site at low cost; UWB delivers centimetre precision where it's essential, at higher cost and complexity. They sit at opposite ends of the accuracy-cost trade-off.

Why so many teams go hybrid: Wi-Fi + BLE

Rather than choosing, most high-performing deployments combine both - Wi-Fi for coverage, BLE for precision - on the same access points, orchestrated by one software platform.

Coverage from Wi-FiSite-wide reach on infrastructure you own.
Precision from BLETighter accuracy, long battery, RTLS use cases.
One platformNAO Suite orchestrates both as a single system.
The Pole Star approach

Why Pole Star combines Wi-Fi and BLE

Pole Star stays fully compatible with existing Wi-Fi infrastructure - and pairs it with BLE to reach the accuracy and RTLS use cases Wi-Fi alone can't.

Wi-Fi for coverage, BLE for precision - one platform

Wi-Fi gives excellent coverage on infrastructure that's already deployed. BLE adds better accuracy, lower power consumption and advanced RTLS use cases. Pole Star's NAO Suite orchestrates both as a single system - so you get the reach of your Wi-Fi and the precision of BLE, without multiplying equipment.

Existing Wi-Fi infrastructure

Compatible with the access points you already run - no rip-and-replace.

BLE on the same APs

Uses Cisco, Aruba and Fortinet access points for BLE positioning too.

Proprietary location engine

The software where accuracy is won - algorithms, fingerprinting, calibration.

Open & hardware-agnostic

Open API and SDK, interoperable with different tags and infrastructures.

One platform

Indoor navigation, RTLS, geofencing and analytics from a single system.

Fast to deploy

Rapid rollout without multiplying dedicated equipment across the site.

Strategic partners Cisco & Cisco Spaces HPE Aruba Fortinet ISO 27001
Trusted internationally
Northwestern Medicine RCCL SNCF Carnival Atalian
Accuracy & performance

Accuracy across the boundary

Accuracy naturally shifts as the source changes. What matters most for continuity isn't a single number - it's a smooth, gap-free transition.

Accuracy by zone

Zone
Source
Typical
Note
Outdoor
GNSS / GPS
3-10 m
Open sky; worse near tall buildings
Transition
Fusion
variable
The engine blends both to stay smooth
Indoor
BLE + Wi-Fi
1-5 m
Tighter, on existing infrastructure

The real challenge: the transition

Where continuity is won or lost

Getting accuracy right outdoors or indoors is well understood. The hard part is the doorway, where GNSS degrades and indoor signals are just coming into range. A poor system jumps, freezes or shows two positions; a good one blends sources so the dot glides through. This is a software problem - and it's exactly what the fusion engine is built for.

What influences a smooth handover

Coverage overlapIndoor signals should reach the entrance while GNSS is still present.
Building entrance designDeep lobbies and canopies affect where GNSS actually drops.
Map alignmentOutdoor and indoor maps must be georeferenced to the same frame.
Fusion tuningHow the engine weighs each source sets how smooth the handover feels.
Use cases & sectors

Where Wi-Fi positioning is used

From navigation to analytics - often strongest when Wi-Fi coverage is paired with BLE precision.

Common use cases

Indoor navigation Asset tracking Visitor guidance Occupancy monitoring People tracking Analytics Workplace management Smart buildings

Where it's particularly relevant

Healthcare Airports Offices Universities Shopping centres Hospitality Retail Industry
FAQ

Wi-Fi positioning, answered

Technical · for IT
What is Wi-Fi positioning?

Wi-Fi positioning locates devices and people indoors using the signals of existing Wi-Fi access points. A location engine estimates position from signal strength and a radio map of the site.

How does Wi-Fi positioning calculate location?

A device is seen by several access points. The engine uses signal strength (RSSI) with trilateration and fingerprinting - matching the live signal pattern to a surveyed radio map - to estimate position.

Why doesn't GPS work indoors?

GPS relies on satellite signals that don't penetrate buildings reliably. Wi-Fi already blankets most indoor spaces, making it a practical alternative for indoor location.

What is Wi-Fi fingerprinting?

Fingerprinting builds a map of the signal pattern across a building, then matches a device's live readings to that map. It's often more robust than pure signal-strength methods in complex layouts.

What is 802.11mc / Wi-Fi RTT?

It's a time-of-flight method that measures round-trip time between device and access point, offering tighter accuracy than RSSI - but it requires compatible access points and devices.

Does Wi-Fi positioning need special access points?

Standard Wi-Fi positioning uses existing APs. Cisco, HPE Aruba and Fortinet infrastructure is supported, and the same APs can also host BLE for higher accuracy.

Accuracy & deployment · for IT & facilities
How accurate is Wi-Fi positioning?

Typically a few metres - roughly 3-8 m with RSSI or fingerprinting, tighter with time-of-flight. For 1-5 m accuracy, Wi-Fi is usually combined with BLE.

What affects Wi-Fi positioning accuracy?

Access point density, walls and materials, radio interference, the number of users on the network, and how well the radio map is calibrated and maintained.

Can I reuse my existing Wi-Fi network?

Yes - that's the main advantage. Positioning is added onto the access points you already run, with little additional hardware.

Is Wi-Fi positioning fast to deploy?

Generally yes, because the infrastructure is already live. The main work is connecting APs to the engine, building the radio map and calibrating.

Can Wi-Fi positioning be hosted on-premise?

Yes. The platform runs in the cloud or fully on-premise, so deployment matches your security and data-residency requirements.

Does Wi-Fi positioning drain phone batteries?

Continuous scanning uses more power than low-energy BLE. For battery-sensitive asset tags, BLE is usually preferred, which is another reason hybrid setups are common.

Choosing & business · for decision makers
Wi-Fi or BLE - which should I choose?

Use Wi-Fi for coverage and navigation on existing infrastructure; BLE for tighter accuracy, long tag battery and RTLS. Many sites use both. See the comparison.

Why combine Wi-Fi and BLE?

Wi-Fi gives broad coverage on infrastructure you own; BLE adds precision, low power and advanced RTLS. Together, on one platform, they cover more use cases than either alone.

What can Wi-Fi positioning integrate with?

Through API and SDK it connects to business apps, mobile apps, BMS, CMMS and IoT platforms, in the cloud or on-premise.

Which sectors use Wi-Fi positioning most?

Healthcare, airports, offices, universities, shopping centres, hospitality, retail and industry - anywhere with large indoor spaces and existing Wi-Fi.

Is Wi-Fi positioning GDPR compliant?

It's designed to support strict data regimes, with aggregation, role-based access and on-premise options - configured to each organization's policy.

How do I choose the right solution?

Weigh accuracy required, existing infrastructure, budget, site size, number of users or assets, and real-time needs - which together point to Wi-Fi, BLE, or a hybrid.

Related technologies

How Wi-Fi fits with other technologies

How each one relates to Wi-Fi positioning, and when to reach for it.

BLE

Best paired

The precision partner to Wi-Fi - tighter accuracy, long battery and RTLS, on the same access points.

Explore BLE

Indoor positioning

Overview

The broader field Wi-Fi belongs to. Start here for how indoor location works across technologies.

Explore indoor positioning

RTLS

Application

Real-time location systems build on Wi-Fi and BLE for asset and people tracking at scale.

Explore RTLS

NAO SDK

Integration

Delivers Wi-Fi and BLE positioning into your own mobile app - blue-dot location and routing.

Explore NAO SDK
Get started

Get the most from your Wi-Fi - and add BLE where it counts

Book a demo and we'll show indoor location running on your own Wi-Fi, with BLE added exactly where you need tighter accuracy.

  • Compatible with existing Cisco / Aruba / Fortinet
  • Wi-Fi for coverage, BLE for precision - one platform
  • Cloud or on-premise, ISO 27001
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