  Intra-Vehicular Wireless Sensor Network (IVWSN) is a new automotive
architecture that applies wireless technologies to the communications between
Electrical Control Units (ECUs) and sensors. It can potentially help achieve
better fuel economy, reduce wiring complexity, and support additional new
applications. In the existing works, most of the popular wireless technologies
applied on IVWSNs occupy the same 2.4 GHz ISM frequency bands as WiFi and
Bluetooth do. It is therefore essential to evaluate the performance of IVWSNs
under interference from WiFi and Bluetooth devices, especially when these
devices are inside the vehicle.
  In this paper, we report the results of a comprehensive experimental study of
IVWSNs based on ZigBee and Bluetooth Low Energy under WiFi and Bluetooth
interference. The impact of the interference from Bluetooth and WiFi devices
can be clearly observed from the experiments. The results of the experiments
conducted suggest that Bluetooth Low Energy technology outperforms ZigBee
technology in the context of IVWSNs when WiFi interference exists in the car.
