Reliability of bidirectional V2X communications in the intelligent transport systems

Cooperative intelligent transport systems (ITS) are considered as the key enabling technology to improve road safety, traffic efficiency and driving experience. V2X (vehicle-to-vehicle and vehicle-to-infrastructure) communications are gaining increasing importance in automotive research and engineering domains. Many mobility and convenience applications require the V2X bidirectional communications mode. Features exploiting these communication schemes are still in the early stages of research and development. This paper focuses on evaluating reliability of bidirectional communication channels with periodical sessions of communication and two possible methods of reliability monitoring: with diagnosis procedures only during communication sessions and with additional periodical test in the pauses between communication sessions. The equations of availability of communication channel for both monitoring methods were obtained. The optimal parameters of channel monitoring were defined.