ZigRa: Physical-Layer Cross-Technology Communication from ZigBee to LoRa
摘要
Wireless Personal Area Network (WPAN) technologies, such as ZigBee, face challenges in directly connecting to LPWAN due to their very short communication distance (e.g., 30 m) and the different modulation/demodulation techniques of Cross-Technology Communication channel, i.e., ZigBee adopts OQPSK modulation scheme while LoRa employs chirp spread spectrum modulation. To address this issue, a novel communication method called ZigRa has been introduced. ZigRa is a cross-technology communication method that facilitates ZigBee devices to connect and communicate with LoRa-based LPWANs. This method uses physical-layer communication, utilizing special input chips in the 2.4 GHz band to transmit information. This approach entails generating ultra-narrowband signals, which are single-tone sinusoidal signals, by manipulating the payload of ZigBee devices. Evaluating both USRP and commodity devices revealed that ZigRa can achieve concurrent wireless communication over a distance of 500 m.