Sequitur InGPS TWR

Decentralized architecture based on Two Way Ranging


Sequitur InGPS TWR is a decentralized RTLS architecture, which uses the Two Way Ranging (TWR) technique for localization.

2D positioning needs at least 3 anchors. 3D positioning needs at least 4 anchors.

This technique ensures the maximum accuracy of positioning. The tag density is limited, a few tags can be tracked in the same area at the same time (number of tags scales with the refresh rate, i.e., number of position updates per tag per second).

Ideal solution for drones and robots navigation also in GPS-denied areas, since the position is available locally at tag side (no need of wireless connections with central units to gather the tag position usually leading to latency issues and connection unreliability).

InGPS TWR is suitable for large and heterogeneous environments. Decentralized management allows nodes to dynamically join and leave the network during normal operating mode. For this reasons, decentralized management does not require a network infrastructure, a central control unit and master nodes for coordination.

InGPS tags can be carried by robots, machines, forklifts, and trolleys and can be connected through Ethernet, Wi-Fi, serial or other industrial standards. External power supply needed (battery pack or wide range of supply voltage accepted). Possibility of sensors data fusion for increased reliability and accuracy is enabled.

Simple UDP-based APIs with extensive documentation are provided for interacting with InGPS tags. The professional Sequitur Manager and its web-based Sequitur User Interface enable a simple configuration, managing and monitoring of the network, including the 3D real-time visualization of the tags’ positions. REST APIs are available for high-level interfacing with third-party software.