TE - White Papers

TE Connectivity White Paper /// V2X - An important building block in Cooperative Intelligent Transport Systems (C-ITS) Page 6 V2X – An important building block in Cooperative Intelligent Transport Systems (C-ITS) In another possible operation mode of this approach, the Day-1 applica- tions are outsourced from the V2X control unit to a host system. In this case, the V2X control unit acts as the communication module, with the V2X control unit supporting only part of the V2X stack including facili- ty layer, network and transport layer, plus security processing. All generated V2X messages are transferred via Ethernet to the host system. In the host system, the ap- propriate facility layer proxy receives the data. Positioning data is either collected from the control unit's in- ternal positioning solution or provid- ed by the host system via an external interface, complete with the vehicle status data. Figure 7 presents a comparison of the two approaches for an indepen- dent V2X control unit. 3.2. Distributed V2X system A second possible approach is a distributed system. The idea here is to position the transmitter/receiver unit, also called V2X radio, in close proximity to the antenna, with the actual V2X application being oper- ated on a physically remote comput- ing unit, called TCU SoC in figure 8. Figure 9 illustrates the distribution of software blocks in a distributed approach. Only the radio access lay- er is operated directly at the anten- na on a V2X radio chip set, with the data being translated into digital IP data streams (IP data) directly at the antenna and then transferred to a computing unit. This is also called a RF2IP approach. This distributed implementation ap- proach will also support even more complex vehicle architectures with various domains and domain con- trollers (domain centralized), as well as vehicle architectures with central high-performance computers (vehi- cle centralized). In these architec- tures, sensors will be kept as simple as possible, with the intelligence be- ing shifted to so-called zonal gate- ways. For processing, the data will Fig 5: V2X as a sensor in an ADAS system Fig. 6: Architecture of an independent control unit Fig. 7: Software blocks for V2X Application in ECU (left); outsourced V2X application (right).

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