Badge guide

Worker tracking without gateways: RTLS or a standalone badge?

Name: Worker tracking without gateways: RTLS or a standalone badge?
Brand: ZeroBadge

Worker tracking without gateways means the badge reports on its own cellular connection, so nothing is installed on the jobsite. A real-time locating system (RTLS) works the other way: fixed anchors, readers or access points on site measure each tag, which can place a worker in a room. The trade is setup at every site for finer position. A standalone badge answers which jobsite, not which room.

Last updated October 29, 2026

An RTLS needs fixed equipment at known positions on every site

A real-time locating system works by measuring a worker's tag from several points whose positions are known. Those points are installed on the site: ceiling anchors, readers, gateways or Wi-Fi access points. The tag the worker wears is only half of the system. The other half stays behind when the crew leaves.

Three common RTLS technologies, and what each puts on the jobsite
Technology	What is fixed on site	What the worker wears	Accuracy a vendor can reach
Bluetooth direction finding	A locator with an antenna array, fixed in place, per area to cover	A tag with a single antenna	The Bluetooth SIG says systems built on it can reach centimeter-level accuracy. It does not promise that for every installation.
Ultra-wideband (UWB)	Anchors at surveyed positions, usually several per area	A UWB tag	Very wide bandwidth makes timing precise, so ranging is far finer than signal-strength methods. Real results depend on calibration and line of sight.
Wi-Fi round-trip timing	Access points that support the 802.11mc timing feature, within range of the device	A device that supports Wi-Fi timing	Android's test targets are about 2 meters at 80 MHz, 4 meters at 40 MHz and 8 meters at 20 MHz bandwidth, measured at the 90th percentile.

The Android figures are conformance test targets for a phone measuring against compatible access points, not a promise for a construction site. Ceilings, concrete and open framing change every one of these numbers.

What gets installed, and who is on the site when it happens

Installation is a project in its own right, with a site survey first. Someone has to decide where the anchors go, mount them, power them, connect them to a network and then calibrate the system against a floor plan. Only after that does a tag reading mean anything.

1
Survey the building
The vendor walks the floors to choose anchor or gateway positions. More floors, more concrete and more partitions mean more points.
2
Mount and power the equipment
Anchors and gateways need power, often over network cable, and a backhaul connection to the vendor's software. A building under construction may not have either yet.
3
Map and calibrate
Anchor positions are entered against the floor plan, and the system is tested by walking known points. When a partition goes in, readings near it can shift.
4
Issue tags and train crews
Tags are assigned to workers. Anyone entering an area without a tag is invisible to the system.
5
Move or remove it at close-out
On a short job, taking the equipment down and installing it at the next site repeats the first four steps.

RTLS can say which room. A standalone badge says which jobsite.

The accuracy difference is real and it decides most purchases. A worn badge with its own cellular connection answers one question well: was the worker at this jobsite, and for how long. It does not give room or floor position. An RTLS can, when it is installed and calibrated for the area.

Questions each approach can answer
Question	RTLS with anchors or gateways	ZeroBadge standalone badge
Was Dana on the Elm Street job on Tuesday, and for how many hours?	Yes, if the whole site is covered	Yes. This is what it is built for.
Did the crew move from job A to job B during the shift?	Only where both sites have the system installed	Yes. A move between sites stays one shift.
Which floor of the building is the crew on?	Yes, with floor-level coverage	No. Which jobsite, not which floor.
Is the crew in the electrical room or the corridor next to it?	Possibly, with dense anchors and calibration	No
How long did Dana spend at the supply house and in the shop?	Not unless those places are covered too	Yes, if they are drawn as locations
Where was the badge when the signal dropped?	Depends on the vendor's buffering	Readings are stored and uploaded on reconnect with their original timestamps

How a standalone badge finds position is covered in indoor worker location without beacons. It uses GPS outdoors and Wi-Fi positioning indoors, with cellular continuity marked low confidence in between.

Cost and deployment trade-offs: per site versus per badge

An RTLS cost is mostly per site: survey, equipment, installation, network and removal. A standalone badge cost is mostly per badge: the device, a cellular data connection and the software. Which is cheaper depends on how many sites you run and how long each one lasts, not on the sticker price of one tag or one badge.

Where each cost lands
Cost driver	RTLS	Standalone cellular badge
New jobsite	Survey, mounting, power, network and calibration	Draw a geofence from the address
Jobsite closes	Remove and re-use or write off equipment	Archive the site in software
Larger building	More anchors, more cabling, more calibration	Same badge, same setup
More workers	More tags, and every area they enter must be covered	More badges
Ongoing	Equipment upkeep, network and software	Charging, cellular data and software
Pricing	Varies by vendor and site	Quote-based, depending on badges, office users and contract term

Install events for two different contractors, using stated assumptions

Contractor A: one 14-month ground-up project, one site: 1 RTLS install, 1 removal
Contractor B: 30 short interior jobs in a year, average 6 weeks each: 30 RTLS installs, 30 removals
Assumed crew time to install and commission one site (assumption, not a vendor figure): 2 people x 6 hours = 12 person-hours
Contractor B install time alone: 30 x 12 = 360 person-hours, before any removal
Contractor A install time alone: 1 x 12 = 12 person-hours
What this shows: The same install effort is a rounding error for A and a part-time job for B.

The 12 person-hour figure is invented to show the arithmetic. Your vendor's survey decides the real number for each building. The shape of the answer holds: the more your sites change, the more the install cost repeats.

When an RTLS is the better choice

Pick an RTLS when position inside the building is the point and the building stays put. That describes a lot of real work, and a standalone badge is not a substitute for it.

Your crew works for months or years inside one plant, campus or building, so the install happens once.
You must know which room, floor or zone a worker was in, for a contract, a process or a records requirement.
You also need to locate equipment or materials, not only people, and the same infrastructure can serve both.
The building already has power, network and a floor plan to calibrate against.
Every worker who enters an area is willing to carry a tag, and there are consequences if one forgets.

A quick decision rule
Your situation	Better fit
Crews rotate across many short jobs, the shop and supply houses	Standalone cellular badge
One long-running plant or campus project with room-level requirements	RTLS
You mostly need hours by jobsite for timesheets and job cost	Standalone cellular badge
You need hours by jobsite for most jobs and room-level data for one	A badge for the fleet, and RTLS only on the one site that needs it
Work far outside cellular coverage	Neither approach as described here. Look at on-site networks you control.

How ZeroBadge works without gateways

The badge has its own cellular connection, reports about every 5 minutes while it is powered on, and sends readings directly. Nothing on the jobsite receives them. Jobsites are geofences drawn in software from an address, and there are no beacons, gateways, kiosks or clocks.

Setup per jobsite: Type the address, adjust the geofence on the map, save. Badges are recognised there from the next reading.
Method and confidence: Every reading stores whether it came from GPS, Wi-Fi positioning or cellular continuity, and how confident it is. Cellular is labelled low confidence.
No signal: The badge stores readings and uploads them when it reconnects, with the original timestamps.
What the office gets: Every minute classified on site, in transit or other and allocated to a jobsite, with a short exceptions list instead of raw readings.

For radio standards and the checks to run before buying any cellular badge, read the cellular badge tracker buyer's guide. It does not work far outside cellular coverage, and it does not replace an RTLS where room-level position is required.

Frequently asked questions

What is worker tracking without gateways?

It is tracking in which the worn device reports on its own, usually over a cellular connection, so no readers, anchors or gateways are installed on the jobsite. ZeroBadge works this way. The trade-off is that it answers which jobsite a worker is at, not which room.

What is the difference between RTLS and a cellular badge?

An RTLS measures a tag from fixed equipment at known positions on site, so it can reach room-level position where it is installed and calibrated. A cellular badge reports over the carrier network and needs no site equipment, so it covers any jobsite with signal but not room-level position.

How accurate is UWB or Bluetooth direction finding compared with a badge?

They can be far finer, down to centimeters in a well-designed installation according to the Bluetooth SIG, but only where the anchors or locators are installed and calibrated. A standalone badge answers which jobsite and does not promise indoor precision.

Can I use RTLS on one site and badges everywhere else?

Yes. They answer different questions. A badge records hours by jobsite for every site, the shop and the supply house, while an RTLS adds room-level detail on the one site that needs it.

Does a standalone badge work in a building under construction?

Yes, where there is cellular signal. Outdoors the badge uses GPS. Indoors, before the building has Wi-Fi, readings may be lower confidence or stored until signal returns, and the exceptions list shows what to confirm. See indoor location without beacons.

Sources

1.Bluetooth direction finding: angle of arrival, locators with antenna arrays, centimeter-level location accuracy · Bluetooth SIG
2.Wi-Fi RTT (IEEE 802.11mc, IEEE 802.11az): access point requirement and 90th-percentile accuracy targets by bandwidth · Android Open Source Project
3.An Overview of Ultra-WideBand (UWB) Standards and Organizations (IEEE 802.15.4, FiRa, Apple) · Coppens et al., IEEE Access (2022)