Components

SCOOP system components shall designate all physical components that enable users to produce or exchange the message necessary to produce the SCOOP use cases.

• TMS means « Traffic Management System ») or « Operating Terminal (OT) » and is the traffic management system under the responsibility of the road operators.

• The central ITS station, called ITSS-C or SCOOP platform, receives and processes information received from the management terminal or the road operator’s traffic management system. It sends information to the operator’s cooperative equipment (roadside stations or stations in the operator’s vehicles)., but does not communicate directly with the user’s vehicles. It processes information received from the roadside stations and makes it available to the operator.

• The roadside stations (or units), called RSU or ITSS-R, receive the information from the SCOOP platform and broadcast them locally to users’ vehicles. They receive information and queries transmitted by vehicles, which are than processed (for storage, routing or sending). They send the event-based messages in a non-consolidated form to the SCOOP platform. They send the traffic information to the platform after having them consolidated. They broadcast service announcement messages.

• The users’ on-board units, called ITSS-VU, are the ITS stations installed in users’ vehicles, which are linked to an already existing serial human-machine-interface (HMI). They are able to broadcast automatically or manually via the HMI messages to other ITS stations. They receive information sent by other vehicles or roadside units, process it and allow the potential display to the driver via its HMI. ITSS-VUs cannot communicate (send or receive messages) directly with the SCOOP platform.

• The road operators’ on-board units, called ITSS-VG, are the ITS stations installed in road operators’ vehicles, which are linked to a dedicated human-machine-interface (HMI). These units are able to fulfill all functionalities of an ITSS-VU as well as specific road operator functionalities (« operator » or « mobile ITSS-R » mode). So, they are also able to broadcast automatically or manually via the HMI messages to other ITS stations. They receive information sent by other vehicles or roadside units, process it and allow the potential display to the driver via its HMI. But ITSS-VG can also communicate (send or receive messages) directly with the SCOOP platform. This mobile ITSS-R function designates the fact that the ITSS-VG sends, like a ITSS-R, directly to the SCOOP platform the event-based messages transmitted by the users’ vehicles or created by the operator ITSS-VG itself. Nevertheless, the ITSS-VG does not send any other traffic information – consolidated or not – than its own.

• The PKI server (Public Key Infrastructure) provided by IDnomic aims to secure the exchanges between the ITS stations thanks to its issued electronic certificates. The C-ITS communications, exposed to threats of cyber attacks, have to be trusted and secured. This characteristic is ensured by the PKI system used with the purpose of guaranteeing the integrity and the authenticity of exchanged messages. In order to make these exchanges confidential and untraceable, the certificates issued by the PKI system to the ITS stations are anonymous and renewable frequently. In practice, the ITS stations request the PKI a pool of pseudonym certificates with a limited lifetime and specified rights. This PKI system complies with the ETSI standards of ITS communications’ security. It is hosted and operated in a secured data-center compliant with the practices of a trust service provider.