What is an RTLS?
Real-time location for
every asset and person.
A real-time location system tracks where your assets and people are, live, indoors. Pole Star takes a BLE, software-first approach - on the wireless network you already own.
What is an RTLS?
A real-time location system (RTLS) is a technology that continuously identifies and tracks the location of assets and people inside a building. Tags or smartphones broadcast wireless signals - typically Bluetooth Low Energy (BLE) - received by fixed scanners, which a software location engine converts into live position. Modern RTLS is software-first: it runs on existing BLE and Wi-Fi infrastructure rather than a dedicated sensor network.
A real-time location system (RTLS) shows where assets and people are, live, across a facility.
Tags and phones broadcast signals to BLE / Wi-Fi scanners; a software engine computes and streams location.
In hospitals, airports, industry, logistics, maritime and smart buildings - any large indoor site.
Digitalization demands operational visibility, automation and safety - and RTLS turns location into data. See BLE.
How a BLE RTLS works, step by step
A tag broadcasts, existing access points receive, and software does the hard part - turning raw signals into a location you can trust and act on.
Tags & smartphones
BLE advertisement
BLE / Wi-Fi access points
Location engine
Software platform
Apps & integrations
1-2Tags and phones broadcast
A battery BLE tag on an asset, or a smartphone running the SDK, emits a signal at regular intervals. Battery tags last years; phones need no hardware at all.
3Existing access points listen
BLE-enabled Wi-Fi access points - Cisco, HPE Aruba or Fortinet - act as scanners, receiving each signal from several positions. In most sites, no new sensors are installed.
4The location engine does the work
This is where accuracy is really won. The software applies fingerprinting, filtering and calibration to convert noisy signals into a stable, reliable position - far more than raw hardware alone could deliver.
5-6Platform, apps and integrations
Location flows through a software platform into dashboards, mobile apps and business systems via API and SDK - feeding tracking, alerts, analytics and automation.
The components of an RTLS
Four layers make up a modern RTLS - and in a software-first system, the intelligence sits in the engine, not the hardware.
Tags & smartphones
01The located items. Battery BLE tags go on assets; staff and visitors can be located through a smartphone running the SDK - no dedicated device needed.
- Asset tags
- Card, sticker, puck; 1-5 year battery
- People
- Staff badge or smartphone via SDK
- Choice
- Form factor per asset, IP rating per environment
BLE / Wi-Fi infrastructure
02The scanners that receive signals - most often the BLE-enabled Wi-Fi access points you already run, so there's no parallel network to install.
- Scanners
- Cisco, HPE Aruba, Fortinet APs
- Reception
- Multi-point across each zone
- Choice
- Reuse existing network vs add beacons
Location engine
The coreThe software that turns raw signals into reliable location. This is where accuracy is truly determined - through algorithms, not just hardware.
- Methods
- Fingerprinting, filtering, calibration
- Output
- Real-time position with floor detection
- Hosting
- Cloud or on-premise
Software platform
04The layer that delivers location as usable data - dashboards, mobile apps and integrations into your existing systems via open API and SDK.
- Interfaces
- Open API, SDK, webhooks
- Integrations
- BMS, CMMS, IoT, business apps
- Choice
- Ready dashboards vs embed in own app
What a modern RTLS enables
Location is just the start. One RTLS platform powers a whole range of operational use cases - each one built on the same live location layer.
Asset tracking
Locate equipment in real time.
People tracking
Locate staff where appropriate.
Geofencing
Trigger actions at zone borders.
Zone monitoring
Watch activity per area.
Occupancy monitoring
Count people per zone, live.
Lone worker protection
Located duress and man-down.
Mustering
Confirm headcount in evacuations.
Indoor navigation
Blue-dot wayfinding in-app.
Analytics
Movement, dwell and utilization.
Workflow automation
Location-triggered processes.
How precise does an RTLS need to be?
Not every project needs centimetre accuracy. The right level is the one your use case actually requires - and reaching it reliably is mostly a software problem, not a hardware one.
Levels of precision
Which room or area
Knows the space something is in - a ward, a hall, a store. Simple, robust and enough for many use cases.
Which zone within a space
Resolves sub-areas inside a larger space, typically a few metres, for finer operational visibility.
A precise position
Pinpoints location to roughly 1-3 metres, or tighter with the right infrastructure and methods.
Why the software matters most
Accuracy is won in the location engine
The same hardware can give very different results. Raw signals are noisy - it's the algorithms that turn them into a stable, trustworthy position. This is why a software-first RTLS can reach the accuracy a project needs on existing infrastructure, without over-investing in sensors.
When to use BLE rather than UWB
UWB is excellent technology - and so is BLE. They answer different needs. The question isn't which is "best", but which fits your accuracy, cost and scale.
BLE vs UWB
Choose BLE for zone and room-level tracking at scale, on existing infrastructure and low cost. UWB earns its place where centimetre precision is genuinely required - the two are complements, not rivals.
Why BLE became the dominant RTLS technology
A software-first, open RTLS
Pole Star has focused on indoor location for over 15 years. The approach is deliberately software-first and hardware-agnostic - the value is in the location engine and the open platform, not in locking you into proprietary sensors.
Software-first
Accuracy comes from the location engine - fingerprinting, filtering and calibration - so you reach the precision you need without over-buying hardware.
Hardware-agnostic
Interoperable with different tag makers and infrastructures, so you're never tied to a single vendor's ecosystem.
Reuses existing infrastructure
Runs on the BLE-enabled Cisco, HPE Aruba and Fortinet networks you already operate - not hundreds of new sensors.
Open API & SDK
An open architecture pushes location into your own apps and systems, so RTLS becomes a data source in your stack.
Right-sized precision
Accuracy is matched to the operational need - room, zone or metre - avoiding unnecessary cost.
Proven internationally
Deployed across hospitals, airports, industry and cruise ships worldwide, at facility and multi-site scale.
ISO 27001
From one building to a global estate
A software-first RTLS is quick to deploy on existing infrastructure, scales from a single site to many, and meets enterprise security and privacy requirements.
How a rollout runs
Survey & plan
Assess floor plans, existing Wi-Fi and goals to size coverage.
Enable & connect
Turn on BLE on existing APs or add tags, and connect to the engine.
Calibrate
Map floor plans and tune the engine to the target precision.
Integrate & go live
Connect apps and systems via API and SDK, then launch.
Cloud or on-premise
- Cloud for fast rollout and low operational overhead.
- On-premise where data must stay inside your own infrastructure.
- The choice is driven by each sector's compliance and connectivity needs.
Security & privacy
- ISO 27001 practices and role-based access control.
- GDPR-aware: people data can be aggregated and anonymized.
- A secure architecture designed for regulated environments.
Scalability
Where RTLS is used
One technology, many environments - each with its own operational priorities.
Sectors Pole Star covers
Concrete examples
Find a stretcher in a hospital in seconds
Mobile equipment moves constantly; a BLE tag gives its live location so staff stop searching.
Asset trackingLocate baggage carts across terminals
Thousands of carts drift across a huge footprint; RTLS shows where they cluster and run short.
Flow analyticsProtect lone workers in a tunnel or plant
A located duress or man-down alert cuts response time where GPS can't reach.
Worker safetyTrack passengers and crew aboard a ship
Location supports safety, mustering and service across decks in a GNSS-denied environment.
MaritimeAnalyze visitor flow in a building
Aggregated movement and occupancy reveal how spaces are really used, to optimize them.
Flow analyticsOne platform, every use case
Start with one capability and add others on the same location layer, when you're ready.
Location platformRTLS, answered
What does RTLS stand for?
RTLS stands for real-time location system - a technology that continuously tracks the location of assets and people inside a building, where GPS cannot reach.
How does a BLE RTLS work?
Tags or smartphones broadcast BLE signals, received by BLE-enabled access points. A software location engine converts those signals into a real-time position streamed to apps and systems.
What accuracy does an RTLS provide?
It depends on the level you need: room-level, zone-level, or metre-level (roughly 1-3 m with BLE, tighter with the right setup). Not every project needs centimetre accuracy.
Why does the software matter more than the hardware?
Raw signals are noisy. Fingerprinting, filtering and calibration in the location engine are what turn them into a stable, reliable position - so the same hardware can give very different results.
Does an RTLS track people or only assets?
Both. It locates tagged assets and, where appropriate, staff via badge or smartphone - with privacy controls such as aggregation and role-based access.
Can it work through walls and across floors?
Yes. Signals pass through most internal walls, and a well-designed system resolves the correct floor as well as position, which is essential in multi-level buildings.
Can I reuse my existing Wi-Fi network?
In most cases, yes. BLE-enabled Cisco, HPE Aruba or Fortinet access points act as scanners, avoiding a dedicated sensor network and reducing cost.
How long does a beacon battery last?
Typically up to 10 years on a single battery, depending on the broadcast frequency configured for the use case.
Can it be deployed on-premise?
Yes. The platform runs in the cloud or fully on-premise, so deployment matches your security and data-residency needs.
How scalable is an RTLS?
It scales from a single building to a campus or many sites, handling thousands of assets across a global estate in one view.
Is it a proprietary or open system?
A software-first RTLS is open and interoperable - working with different tag makers and infrastructures via API and SDK, rather than locking you into one ecosystem.
What can an RTLS do beyond locating things?
Asset and people tracking, geofencing, zone and occupancy monitoring, lone-worker protection, mustering, indoor navigation, analytics and workflow automation - all on one platform.
What systems does an RTLS integrate with?
Through API and SDK it connects to business apps, IoT, BMS, CMMS and mobile apps, so location becomes part of your existing workflows.
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.
Is an RTLS GDPR compliant?
It's designed with privacy in mind - aggregation, anonymization, role-based access and on-premise options - configured to each organization's data-protection policy.
What is the ROI of an RTLS?
Less time lost searching for equipment, better asset utilization, lower purchasing costs, improved safety and actionable data - all on infrastructure you already own.
Why choose a software-first, open RTLS?
It reaches the accuracy you need on existing infrastructure, avoids vendor lock-in, integrates with your stack, and scales - without over-investing in hardware.
Go deeper into the technology
How each piece relates to a real-time location system.
Indoor positioning
FoundationThe positioning technology an RTLS is built on. Start here for how location is computed indoors.
Explore indoor positioningBLE
PrimaryThe dominant technology for modern RTLS - low cost, low power, smartphone-native and scalable.
Explore BLEWi-Fi
ComplementaryExtends coverage on infrastructure you already run, where coarser accuracy is enough.
Explore Wi-FiNAO SDK
IntegrationEmbeds RTLS location into your own mobile app - blue-dot positioning and routing.
Explore NAO SDKSee a software-first RTLS on your own site
Book a demo and we'll show real-time location running on the network you already own, tuned to the precision your operations need.
- BLE + Wi-Fi on existing Cisco / Aruba / Fortinet
- Software-first, hardware-agnostic, open API & SDK
- Cloud or on-premise, ISO 27001, GDPR-aware
Ready to see RTLS in your type of facility? Get in touch and we'll set up a demo.
Book a demo