How to evaluate
an Indoor Positioning Technology

EVALUATION CRITERIA FOR IPS TECHNOLOGY
NEXTOME TECHNOLOGY
Scalability in term of simultaneous users
Unlimited sers simultaneously (the computation is performed on the smartphone so naturally parallilized)
Accuracy
1,5 meter error
Ease of setup/level of automatism
No expertise equired because it is not required fingerprinting
Ease of use (User perspedive)
Just open the app and accept the turn on the Bluetooth if it’s not already active
Configurable remotely
Ererythigh is configurable remotely using backend software
Special hardware required (user side)
Just user’s smartphone with Android and iOS
Seamless indoor/outdood user experience
Supported

Indoor Positioning Technologies

Indoor positioning technologies can be differentiated in two main branches: infrastructure based and infrastructure free IPS technologies. For infrastructure-based we indicate those technologies that leverage on a dedicated infrastructure (sensors, lights, WiFi routers, satellites and so on) to be deployed in the environment. For infrastructure-free we indicate those technologies that do not require a dedicated infrastructure, like geomagnetic field and so on.

Usually most infrastructure-free technologies use also fixed beacons to increase accuracy, so most of them are semi-free infrastructure based. Also IPS technologies can be differentiated based on the accuracy and ease of installation/maintenance. The ease of installation/maintenance practically depends on the fact that a particular technology uses fingerprinting process or not.

Follows a grid with technologies comparison and differentiation based on scalability (number of users simultaneously localizing), ease of setup and maintenance, power consumption, hardware cost, special hardware required (user side).

Evaluation Metrics

As you can notice, Nextome main competitive advantages are accuracy and ease of use/maintenance because no fingerprinting is necessary.

TECHNOLOGY ACCURACY SCALABILITY(*) EASY OF SETUP (1=easy, 5=difficult) POWER CONSUMATION HARDWARE COST SPECIAL HARDWARE
BLE + MLV3 + IntelliWalk + Particle= Nextome 1,5-2m Unlimited users 2 Need to install BT Beacons at suggested positions Low Low Not required
WiFi Fingerprinting (with SLAM) 5-10m Limited / depends on infrastructure 2 Needs to relocate wifi access points Medium No (Uses existing) Not required
WiFi AoA/TDoA 40cm-1m Limited / depends on infrastructure 4 Needs Fingerprinting Medium No (Uses existing) Yes
Bluethoot Low Energy Only trilateration 3-4m Unlimited users 2 Needs to install BT Beacons Low Low Not required
Visual Ligth Communication 10cm-1m Unlimited users (theoretically) 3 Needs installation of special led laghts High High Not required
Magnetic Fingerprinting 2,5-5m Limited / depends on infrastructure 4 Needs Fingerprinting Medium (continuous internet polling) No - Low (praticaly uses also beacon) Not required (theoretically)
Ultra Wide Band 10cm-1m Limited / depends on infrastructure 3 Needs to install UWB Routers Low High Yes
WiFi Trilateration 5-10m Limited / depends on infrastructure 2 Needs to relocate wifi access points Medium No (Uses existing) Not required

(*) in terms of simultaneous users

Solution Design Drivers

What are the problems that we have faced on our installations? Retail, Exhibitions, Fairs, Trade Shows.
The ceiling is usually higher than 5-6 meters height and the place is very crowded.
We solved these problems by mounting BLE Beacons on booths (on isles and columns). Thanks to our signal filtering algorithm and thanks to the crowd sourcing beacons technology integrated in Nextome, our technology still delivers great accuracy even in very crowded places.

Manufacturing (Car Producing Company)
Here the problem is the extreme noise of the beacons signals caused by robots (in metal) moving. We have solved this problem with our strong non linear multipath mitigation filter, patented and integrated by default in Nextome Technology.

Museums
Here the problem is the thickness of the walls, causing signal to not pass from one room to another (especially in Italian’s old museums and buildings). Thanks to the flexibility of the beacon technology, we have solved this problem by simply add few more beacons when necessary and reference their positions on Nextome Content Management System all in a matter of seconds.

Metro Stations / Airports
The problems with Metro Stations and Airport are very similar to Exhibitions: the crowding level and ceiling height. We have solved these problems by mounting beacons on walls and columns when present, and thanks to our signal filtering algorithm and thanks to the crowdsourcing beacons technology integrated in Nextome, our technology still delivers great accuracy even in very crowded places.

Logistic Services / Industry
The problem here is the amount of iron that causes bouncing of signals all around . We solved this problem with our strong non linear multipath mitigation filter, patented and integrated by default in Nextome Technology.

Health / Hospitals
The problem is the coexistence of Nextome with health devices. Nextome uses only low energy bluetooth 4.0 (5.0 in future) beacons which are demonstrated to coexist with medical devices.

Generally, for optimum installation beacons are required to be installed at a high not over 6 meters and can illuminate an area not greater than 100 square meters, therefore attach point must be available to reach the required density of deployed beacons.