Abstract
The Internet of Things (IoT) networks using Zigbee are very popular in smart homes. However, Zigbee networks are vulnerable to the interference of Wi-Fi networks because they share the same 2.4 GHz Industrial, Scientific, and Medical (ISM) radio frequency band. Studies have shown that weaker Zigbee signals might be significantly interfered by stronger Wi-Fi signals. This type of interference may cause severe problems when these types of networks coexist in an indoor environment such as in a smart home. In this paper, the performance of a Zigbee network with and without the presence of Wi-Fi interference traffic has been evaluated in an apartment-based indoor environment mimicking a smart home. The experimental results were obtained and analyzed in terms of packet drop rate (PDR), received signal strength indicator (RSSI), and throughput under various operating channels, distances between Zigbee and Wi-Fi devices, transmission intervals of Zigbee packets, transmit power of Zigbee transmitter, and Zigbee packet lengths.
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