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Future Internet, Volume 11, Issue 10 (October 2019)
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Cover Story (view full-size image) Roadside units (RSUs) are now found on motorways, at urban traffic spots, and also at sites such as [...] Read more. Roadside units (RSUs) are now found on motorways, at urban traffic spots, and also at sites such as AstaZero for testing connected and intelligent vehicles. At test sites, an RSU's main function is to record current vehicular trajectory data sent from passing vehicles. These data are partly used quasi real-time and partly used offline after each test run. The communication problem is to maximize the number of packets received at the RSU, over the very limited duration when the proximity of the vehicle to the RSU gives a high enough SNR. The solution is interpacket coding, where the transmitter augments the raw source packet stream with redundant packets. Such coded transmissions provide up to ten times higher information reception rates, compared to uncoded transmissions. Choosing Wyner–Ash convolutional coding and sliding window decoding, we also get low complexity. View this paper.