The Metirionic ranging technology enhances the IEEE 802.15.4 based low-rate low-power wireless personal area networks (WPAN) by distance measurement functionality. The standard is the basis for higher layer protocol specifications like ZigBee, ISA100.11a, WirelessHART, 6LoWPAN and other.
Our technology can be used with the system on chip solution ATmega256RFR2 which combines a low power 2.4GHz transceiver and an 8-bit AVR core microcontroller, the Atmel AT86RF233 also for 2.4GHz band, and the newest Atmel AT86RF215, allowing ranging distance measurements on 2.4GHz and Sub-GHz bands. With the Metirionic firmware the transceiver obtain especial features only available on RADAR systems. In contrast to classic passive RADAR systems the reflecting target is replaced by an active sensor node. Thus one node acts as initiator of the measurement and the second node takes the role as reflector. Based on the gathered measurement results, the distance between the two nodes can be calculated and provided to a gateway for further processing.