November 2018, Munich, Wireless Congress 2018
A. Akbilek, M. Fünfer, F. Pfeiffer, F. Langer (perisens) and B. Napholz (Daimler AG)
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Abstract—While the demand for higher throughput is continuously rising, the automotive usage of the Wireless Local Area Networks (WLANs) is emerging. Development of new WLAN standards create the necessity of their evaluation for specific usecases.
This paper presents our detailed physical layer (PHY) analysis of the upcoming IEEE 802.11ax standard for in-vehicle use. Basing on our wide-band measurements, we implemented an in-vehicle channel model. End-to-end simulations of IEEE 802.11ax PHY were conducted with this channel model to determine the achievability of the high data rates supported by the IEEE 802.11ax standard for in-vehicle applications. To verify our in-vehicle channel model, we conducted over-the-air (OTA) measurements.
We show that the in-vehicle wireless channel has a much steeper power decay than all IEEE 802.11 channel models and it supports the high data rates defined in the IEEE 802.11ax standard. Our approach to the problem enables realistic evaluation of the upcoming WLAN standards for different use cases before the hardware is available in the market.