Indoor Asset Tracking

Our outdoor strengths open new indoor possibilities

 Tracking mobile assets indoors is hard for cellular networks. Bluetooth solutions offer crude location capability with limited range and feature set. For mobile assets that move through difficult indoor environments or migrate between indoor and outdoor environments, Haystack offers an unmatched combination of RF signal propagation over LoRa using XR2 error correction along with a DASH7 feature set that offers maximum flexibility in designing a location solution that fits your business requirements.

Like our outdoor mobile asset tracking capabilities, Haystack enables real-time, on-demand location features that minimize power draw and offer location precision to just a few meters in indoor environments. Received Signal Strength Indicators (RSSI) form the backbone of our indoor location methodology, but time-based (TDOA) approaches are also available. And like outdoor asset tracking, Haystack offers low-power indoor geofencing capabilities.

No fancy antenna arrays, no “hacking” indoor location with WiFi, and no overpriced “readers” that nuke your budget: Haystack’s capabilities for indoor location are the simplest, most cost effective, and most versatile of any LPWAN technology in the marketplace.

Real-time, Low Power Indoor Location

indoor location graphic with circular saw for asset tracking

• Haystack utilizes the strength of wireless signals, aka Received Signal Strength Indicators, to compute the location of mobile assets without the use of GNSS/GPS. We use trilateration to compute the geometric location of vertices in a polygon, resulting in high precision indoor location up to 1 meter.

• In most cases, we recommend fixed reference nodes to assist in the trilateration computation. The greater the number of fixed reference nodes in a location, the higher the location precision. Similarly, as assets go into motion additional vertices are created allowing for further location granularity.

• Multicast query and peer-to-peer networking determines relative signal strength between mobile endpoint and reference nodes. Single query 

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• Haystack gateways multicast A-GPS  datagrams to nearby endpoints

• Location acquisition time is usually ~2-3 seconds with ~3 meters accuracy

Add indoor location comparison matrix here

graphic explaining benefit of Haystack vs LoRawan and NB-IOT

Indoor geofencing

Asset tracking and other mobile applications in need of geo-based location alerts can take advantage of Haystack’s unique capabilities to deliver high precision geofencing while preserving multi-year battery life. Starting with Haystack’s innovative approach to implementing GNSS/GPS using multicasted A-GPS datagrams, we use signal strength indicators embedded in the DASH7 advertising protocol to minimize GNSS/GPS receiver operations. The result? Real-time geofencing alerts that preserve Haystack’s multi-year battery life performance.
image of geofencing via RSSI

High-precision indoor location with Haystack

Achieving high-precision indoor location over radio technologies like LoRa® requires a fully bi-directional networking stack with multicast and peer-to-peer communications features. With Haystack, fixed battery-powered reference nodes (HayTags, for example) provide an affordable means of providing real-time indoor asset tracking. While we recommend GNSS/GPS in many cases, indoor location and some outdoor location use cases require the use of alternative location methods. Fortunately, Haystack supports Received Signal Strength Indictors natively as part of our approach to supporting GNSS/GPS. We are also continuing to develop our time-based location techniques over LoRa® , providing highly-synchronized Time Difference Of Arrival-based location for interesteddevelopers.

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