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Bluetooth Low Energy
positioning.
Room & zone accuracy, at scale.

The wireless technology behind real-time asset tracking and staff safety in hospitals, airports and industrial facilities - running on the BLE-enabled Wi-Fi you already own.

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Built on ISO 27001 Cisco HPE Aruba Fortinet

What is BLE indoor positioning?

Canonical definition

Bluetooth Low Energy (BLE) is a short-range wireless protocol designed for low power consumption and continuous data transmission. In indoor positioning, BLE beacons broadcast signals captured by gateways or mobile devices, enabling a positioning engine to calculate the real-time location of any tagged asset or person within a facility - typically within 1 to 5 meters of accuracy, depending on infrastructure density.

at a glance
What

Bluetooth Low Energy (BLE) positioning locates tagged assets and people indoors in real time.

How

Beacons broadcast advertisement packets; gateways or APs measure them, and an engine computes position via RSSI or AoA.

Where

In hospitals, airports, factories and warehouses - large indoor sites where GPS fails.

Why BLE

Low power, low cost, years of battery, smartphone-native, and it reuses existing Wi-Fi. See indoor positioning.

How it works

How BLE positioning works, step by step

A beacon advertises, access points listen from several positions, and the engine solves for position from the signals they measure.

1-2The beacon advertises

A BLE beacon or tag broadcasts small advertisement packets at a configurable interval over the 2.4 GHz band. A faster interval improves responsiveness; a slower one extends battery life.

3Access points receive

BLE-enabled Wi-Fi access points - Cisco, HPE Aruba, Fortinet - receive the packets from several positions, each measuring signal strength or angle. In most sites, no new sensors are added.

4The engine solves for position

The positioning engine combines those measurements. RSSI trilateration estimates distance from signal strength; AoA uses multi-antenna anchors to measure direction for higher accuracy.

5-6Location, then action

The output is a live blue dot on the floor plan, driving dashboards, geofence alerts and your own systems through an SDK and API.

Key components

The components of a BLE positioning system

What each part does, the specifications that matter when you buy, and the forms it can take.

Beacon / tag

01

Emits a Bluetooth signal at configurable intervals. The form factor and battery are chosen to match the asset and its environment.

Broadcast
Configurable advertisement interval
Battery
1-10 years by frequency
Form factor
Card, sticker/patch, puck
Buyer choice
Form factor per asset, IP rating per environment

Gateway / access point

02

Receives signals from many beacons at once. Can be dedicated BLE hardware or integrated into existing Wi-Fi - the critical factor for deployment cost.

Reception
Multi-point per zone
Integrated
Cisco, HPE Aruba, Fortinet APs
Dedicated
Standalone BLE gateways
Buyer choice
Reuse existing infrastructure or not

Positioning engine

03

Calculates location from the data the gateways receive. This software is where accuracy is really determined.

Algorithms
RSSI trilateration, AoA, fingerprinting
Output
Real-time X, Y, Z with floor
Hosting
On-premise or cloud
Buyer choice
Compliance & data residency

SDK / API

04

The integration interface for existing business applications - the layer a technical buyer evaluates closely.

Interfaces
Mobile SDK, REST API, webhooks
Latency
Real-time position streaming
Docs
Documented integration support
Buyer choice
Embed in own app vs ready dashboards
Accuracy & performance

How accurate is BLE positioning?

The first question every buyer asks. BLE accuracy depends on the method and the environment - here are realistic ranges, not optimistic marketing figures.

Methods & accuracy

Signal strength

RSSI trilateration1-5 m

Estimates distance from how strong the signal is at each gateway. The most common and cost-effective BLE method, ideal for zone and room-level tracking.

Angle of arrival

AoA0.1-1 m

Uses multi-antenna anchors to measure the direction a signal arrives from. Higher accuracy, at the cost of more specialized infrastructure.

What influences BLE accuracy

Infrastructure densityMore gateways per area gives tighter, more consistent accuracy.
Building materialsConcrete, metal and glass reflect and absorb 2.4 GHz signals.
RF interferenceOther 2.4 GHz systems, including Wi-Fi, add noise.
Broadcast frequencyFaster beacon advertising improves responsiveness and precision.

BLE compared - accuracy only

BLE

1-5 m

Zone and room-level at scale and low cost; sub-metre with AoA.

Wi-Fi

3-8 m

Coarser, but reuses existing access points where they're deployed.

UWB

10-30 cm

Sub-metre precision, at higher cost and dedicated hardware.

Advantages

Why BLE dominates indoor positioning

01

Runs on existing infrastructure

BLE is already built into modern Cisco and HPE Aruba access points, so positioning is added without a second, parallel network.

ForIT & facilities leaders
02

Multi-year battery life

Its low-power design lets beacons and tags run to 10 years on a single battery, so a large fleet doesn't become a maintenance burden.

ForOperations managing fleets
03

Low cost & fast to deploy

No dedicated sensor network to design and install across a whole site keeps both hardware and rollout costs down.

ForBudget owners
04

Smartphone-native

Every modern phone speaks BLE, enabling people-tracking and blue-dot navigation with no extra device to hand out.

ForNavigation & visitor use cases
05

Scales across whole sites

The same approach covers a single ward or an entire campus, so coverage grows with the estate rather than hitting a technology ceiling.

ForMulti-building operators
06

Open integration

An SDK and API push location into your own apps and systems, so BLE positioning becomes a data source rather than a closed tool.

ForTechnical & product teams
Technology comparison

BLE vs UWB vs Wi-Fi vs RFID

Each technology answers a different need. Here's how BLE compares on the criteria that actually drive the decision - accuracy, cost, power and deployment.

BLE vs UWB

Criterion
BLE
UWB
Accuracy
1-5 m (sub-m AoA)
10-30 cm
Infra cost
Low, reuses existing
High, dedicated
Deployment
Simple, scalable
Complex
Best for
Zone tracking at scale
Sub-metre precision
Verdict

Choose BLE for zone and room-level tracking at scale and low cost. UWB earns its place where centimetre precision is essential - the two complement rather than compete.

Hybrid: a site can run BLE broadly and reserve UWB for a few high-precision zones - though most needs are met by BLE alone.

BLE vs Wi-Fi

Criterion
BLE
Wi-Fi
Accuracy
1-5 m
3-8 m
Power
Very low, years
Higher
Tags
Battery tags & phones
Device-based
Best for
Mobile assets, battery life
Coarse, existing APs
Verdict

Use Wi-Fi where infrastructure exists and 3-5 m is enough. Choose BLE when assets are mobile and tag battery life matters - the two often run together.

Hybrid: BLE tags located by BLE-enabled Wi-Fi access points is the most common real-world deployment.
See Wi-Fi full page

BLE vs RFID

Criterion
BLE
RFID
Range
Continuous, area-wide
Read points only
Tracking
Real-time, in motion
Passage / checkpoint
Tag power
Active battery
Often passive
Best for
Continuous location
Static inventory, gates
Pole Star implementation

How Pole Star implements BLE positioning

Not a product pitch - how BLE is actually deployed, and what makes the implementation robust at facility scale.

The Pole Star approach

Pole Star uses BLE as its primary technology, computed by the NAO positioning engine and tuned per environment - gateway density, calibration and floor plans set to the accuracy each use case needs. See indoor positioning.

On your infrastructure

It runs on the BLE-enabled Wi-Fi you already operate, so most sites add positioning without a parallel network. The engine deploys in the cloud or fully on-premise to match sector compliance needs.

Compatible with Cisco & Cisco Spaces HPE Aruba Fortinet ISO 27001
Organizations using Pole Star BLE positioning
Northwestern Medicine RCCL SNCF Carnival Atalian
Healthcare
Hospitals using BLE for asset tracking, safety and wayfinding.
Maritime & cruise ships
Onboard wayfinding, crew and passenger safety across large vessels.
Rail & metro
Stations and networks positioned on existing infrastructure.
Senior living
Resident safety, fall detection and wayfinding in care facilities.
Industry
Plants using BLE for safety and asset visibility.
Deployment

What it takes to deploy BLE positioning

What needs to be in place, how a rollout runs, who does what, and the specifics that can slow a BLE deployment down - so there are no surprises in evaluation.

Prerequisites & phases

1

Site survey

Assess floor plans, existing Wi-Fi and coverage goals to size gateway density.

2

Install & configure

Enable BLE on existing APs or place beacons, and connect them to the engine.

3

Calibrate

Map floor plans and tune the engine to reach target accuracy per zone.

4

Integrate & go live

Connect dashboards, apps and systems via SDK and API, then validate and launch.

Who does what

Pole Star handles
  • Survey, engine setup and calibration
  • Positioning accuracy tuning
  • Integration support and go-live
Your team provides
  • Network access and floor plans
  • IT coordination for AP configuration
  • Application or system endpoints to integrate

Watch-points specific to BLE

Gateway density & placement drive accuracy - too few and precision drops in key zones.

Building materials like metal and concrete reflect 2.4 GHz signals and may need extra calibration.

2.4 GHz interference from Wi-Fi and other systems should be assessed during the survey.

Beacon battery planning - broadcast interval trades battery life against responsiveness.

BLE positioning in action

BLE at work: baggage cart tracking at Paris CDG

A concrete example of Bluetooth Low Energy positioning at scale: for Atalian, Pole Star tracks baggage carts across Paris Charles de Gaulle using BLE on the existing Cisco network - turning cart locations into smart redistribution.

Terminal at Paris Charles de Gaulle Paris Charles de Gaulle
Airports Asset tracking BLE positioning

Baggage carts located and redistributed, in real time

Baggage carts scatter across terminals and pile up where they're not needed. With BLE tags read by the airport's Cisco access points, Pole Star gives Atalian live visibility of every cart - so teams can rebalance the fleet before shortages hit.

BLEBluetooth Low Energy positioning
Ciscoread on existing access points
Real-timelive cart visibility
Paris CDGone of the world's busiest hubs
ClientAtalian
SiteParis Charles de Gaulle
Use caseBaggage cart tracking
TechnologyBLE on Cisco
  • Real-time visibility of baggage carts across the terminal
  • Smart cart redistribution before shortages occur
  • Fewer idle and misplaced carts
  • BLE tags read by the existing Cisco infrastructure
Read the case study Book a demo
Best use cases

Where BLE positioning delivers

Healthcare

Locating critical equipment across a 400-bed hospital in seconds

BLE fits because mobile equipment moves constantly and staff can't afford to search - low-cost battery tags give a live location on existing infrastructure.

Asset tracking
Airports

Guiding passengers turn-by-turn across a multi-terminal airport

BLE fits because it's smartphone-native - a blue dot on the passenger's own phone routes them to the gate, with no device to hand out.

Indoor navigation
Manufacturing

Protecting lone workers across a large industrial site

BLE fits because a located duress or man-down alert cuts response time - a battery badge pinpoints the worker even where GPS can't reach.

Worker safety
FAQ

BLE positioning, answered

Technical · for IT
What does BLE stand for?

BLE stands for Bluetooth Low Energy - a short-range wireless protocol built for low power consumption, ideal for battery beacons and tags used in indoor positioning.

How does BLE calculate location?

Beacons broadcast advertisement packets received by several gateways. A positioning engine computes position from signal strength (RSSI) or angle of arrival (AoA) against the floor plan.

What is the difference between RSSI and AoA?

RSSI estimates distance from signal strength, giving roughly 1-5 m accuracy at low cost. AoA measures signal direction with multi-antenna anchors, reaching sub-metre accuracy with more infrastructure.

What frequency does BLE use?

BLE operates in the 2.4 GHz band - the same band as Wi-Fi - which is why RF interference is assessed during a site survey.

Does BLE work through walls?

Signals pass through most internal walls, though concrete and metal weaken and reflect them. Gateway density is set so accuracy holds across rooms and floors.

Can BLE detect which floor someone is on?

Yes. A properly designed BLE system resolves the correct floor as well as position on it, which is essential in multi-level buildings.

Deployment · for IT & facilities
Can I reuse my existing Wi-Fi access points?

In many cases, yes. BLE-enabled Cisco or HPE Aruba access points can act as gateways, avoiding a dedicated network and lowering cost.

How many gateways do I need per floor?

It depends on target accuracy and layout. A site survey sizes gateway density - tighter accuracy and complex spaces need more per area.

How long does a BLE beacon battery last?

Typically up to 10 years on a single battery, depending on the advertisement interval configured for the use case.

Can BLE positioning be deployed on-premise?

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

Business & integration · for operations
What can BLE positioning integrate with?

Through an SDK and API it connects to your mobile apps, dashboards and business systems - hospital information systems, BMS, CMMS or operational tools.

Is BLE positioning GDPR compliant?

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

Can BLE track people or only assets?

Both. It locates tagged assets and, where appropriate, staff badges or opted-in smartphones - with privacy controls such as aggregation.

When should I choose BLE over UWB?

Choose BLE for large-scale, cost-effective zone and room-level tracking on existing infrastructure. UWB suits cases needing centimetre precision. See the comparison.

Why is BLE so widely used for positioning?

It's low cost and low power, reuses existing infrastructure, gives multi-year battery life, and is built into every smartphone - a rare combination.

What's the ROI of BLE positioning?

Less time lost searching for equipment, faster safety response and better space use - all on infrastructure you already own.

Related technologies

How BLE fits with other technologies

How each one relates to BLE positioning, and when to reach for it.

Indoor positioning

Overview

The broader field BLE belongs to. Start here for how location is computed indoors across technologies.

Explore indoor positioning

Wi-Fi

Complementary

Runs alongside BLE - the same access points that host BLE can provide coarser Wi-Fi positioning too.

Explore Wi-Fi

NAO SDK

Integration

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

Explore NAO SDK
Get started

See BLE positioning on your own site

Book a demo and we'll show real-time BLE positioning on your own floor plans, on the network you already run.

  • BLE on existing Cisco / Aruba / Fortinet
  • Tuned to your accuracy and environment
  • Cloud or on-premise, ISO 27001
Talk to our team
Book a demo
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