PCTC: Parallel Cross Technology Communication in Heterogeneous wireless systems

With the development of embedded systems and Cross-Technology Communication (CTC) techniques, high throughput communication among heterogeneous IoT devices in the same frequency band (ISM band) can be achieved, which provides opportunities to en-hance the coexistence and cooperation for heterogeneous IoT de-vices. However, such improvement on the throughput is limited, since parallel communication has not been considered by most of the existing CTC techniques. There still exists unavoidable distortion in the reliability of the existing CTC techniques because of the heterogeneous properties of the protocols, hardware, and operating systems. Therefore, to enhance the communication throughput among heterogeneous IoT devices as much as possible, we study the parallel physical-layer CTC (PCTC) in this paper. We propose two advanced physical-layer CTCs. The first one improves the communication reliability between two heterogeneous IoT devices by retrieving the candidate emulation frames with high quality, and the other orthogonalizes the above candidate frames to achieve concurrent transmission. PCTC is designed for WiFi to ZigBee communication, and it is also implemented in USRP B210, which can improve the reliability and concurrency of the physical-layer CTC. Both theoretical analysis and experiment results verify its trans-mission reliability and improvement of throughput by comparing our technique with the existing ones.