Indoor location technology

276 views April 13, 2020 0

Spreo can achieve the real-time location of users and assets through the synthesis of a trilateration algorithm with a Bluetooth low-energy (BLE) beacon infrastructure, or can obtain and map location provided by any other third-party location-aware system or infrastructure.

Spreo’s trilateration algorithm and indoor location methodology using BLE technology

Spreo can acquire precise location of any user or asset through the incorporation of a trilateration algorithm. Spreo uses BLE beacons, BLE tags, gateways, mobile devices and geospatially accurate indoor maps to access the necessary information that enables us to employ the trilateration algorithm when establishing location.

Bluetooth low-energy (BLE) beacon technology, “gateways”

SPREO-beacons-gatewaysBLE beacons are devices that broadcast universally unique identifiers – signals that can be picked up and identified by a compatible app or operating system. When these BLE beacons are installed in the physical space and configured accordingly with the venue’s digital map in the content management system (CMS), a mobile device with Spreo’s SDK will use these signals to determine the device’s physical location.

Similarly, when BLE tags are placed on assets, location can be calculated and communicated to the cloud ecosystem via cloud-connected gateway devices. Collectively, these BLE tags frame a comprehensive asset tracking system.  

Spreo is hardware agnostic – we can use any third-party infrastructure to gather location and provide our clients the real-time location of assets and users as well as real time analytics. Some of the third party vendors that Spreo works with include:

  • Estimote
  • Centrak
  • Bluevision

Using BLE technology to obtain indoor location of users and assets

When a device detects multiple surrounding beacons, Spreo’s SDK evaluates the location at which the detected beacons’ signals overlap. The area where the beacon signals overlap is the area that defines the device’s location. Furthemore, the algorithm considers each beacon’s signal strength, direction, and distance from a device in order to calculate the device’s location.

In addition to the trilateration algorithm, Spreo uses the mobile device’s internal sensors such as the accelerometer, altimeter and compass to assist in locating the user. The accelerometer senses device movements and utilizes a dead reckoning algorithm to further inform location. The altimeter along with other device motions provide guidance in determining when a user switches floors.

When tracking entities that do not possess mobile devices (i.e. physical assets), Spreo leverages the use of BLE tags and gateway devices. A gateway refers to a device that is connected to the internet that can gather information from beacon-tagged assets, and can send that information to Spreo’s centralized cloud ecosystem allowing for real-time visualization, tracking, and data analytics.

Integration with third-party location providers

With the capability to integrate with any third-party Bluetooth, WiFi or other indoor location provider/system, Spreo offers a flexible solution that can be installed in every facility with any type of indoor location infrastructure. The adaptability of Spreo’s platform makes it possible for every venue to take advantage of the various use cases that are made available through location technology.


Supported use cases, features

Spreo has integrated its indoor location solutions in hospitals and medical centers, malls, corporate facilities, universities, gaming facilities, stadiums, and more. With the implementation of our indoor location technology, Spreo offers features including indoor-to-outdoor wayfinding & navigation, location-based analytics, geo-fencing and proximity services, location sharing, asset tracking and more.