ITS-G5 and C-V2X Link Level Performance Measurements

Safety-critical ITS applications, as for instance automated urban driving supported by collaborative perception requires a reliable V2X communication link to forward information about detected objects, i.e. vehicles, pedestrians and cyclists, to the automated vehicle. Reliability is given by a low packet error rate over a sufficient communication range and an acceptable latency in the end-to-end communication. The performance of ITS communication might be impaired by different effects, including congestion on the wireless channel, line-of-sight obstruction or fast-fading. Currently, there are two competing wireless communication technologies proposed for V2X, namely WiFi-based ITS-G5 (or DSRC) and LTE-based Cellular-V2X. A field test using both communication technologies has been conducted in order to test the link level performance between a vehicle and a road-side unit. This paper describes the test setup, the executed experiments, discusses the results and gives first conclusions on the performance of both, ITS-G5 and C-V2X