Performance analysis for ZigBee under WiFi interference in smart home

Smart home not only makes people's lives more convenient, but also saves energy and daily expenses for households. Both WiFi and ZigBee are widely deployed in the smart home and operated in the same 2.4GHz ISM band, which results in the coexistence interference. Since the transmitting power of WiFi devices is much higher than that of ZigBee devices, ZigBee is more susceptible to coexisting interference. In this paper, we propose an analytical model to evaluate the performance of ZigBee under WiFi interference in the practical smart home scenario. By considering both channel access behavior and path loss behavior of the WiFi and ZigBee devices, the proposed model is built by involving both the Markov chain model and the indoor path loss model, and the ZigBee performance under WiFi interference is theoretically derived. The simulation results demonstrate the effectiveness of the proposed model for evaluating the ZigBee performance under WiFi interference.