Benefits of Cooperative Communication on Channel Congestion and Dissemination Range in V2X Networks

While vehicular-to-everything (V2X) communication becomes steadily more popular, channel congestion and coverage range often constitute major hurdles for the practical implementability in high density traffic scenarios. Particularly for safety relevant messages, e. g. road safety messages (RSM) or decentralized environmental notification messages (DENM), this can be severely harmful. To overcome these limitations, we introduce a novel communication protocol enhancement based on distributed cooperative communication (DisCoCom) and distributed spatial multiplexing (DisSpaMux) for V2X networks. Thereby, the scheme is extremely robust against practical impairments like multiple carrier frequency and timing offsets as well as Doppler shifts. We can point out by simulations that the proposed scheme enables a significantly more reliable and accelerated (with respectto the communication delay) distribution of RSM or DENM. Furthermore, we emphasize that the enhanced reliable communication range can be utilized for new V2X applications like circumnavigating traffic jams.