Architecture

The VII California architecture will be a framework that depicts how information needed to enable a variety of use cases will flow between vehicles and TMCs, vehicle OEMs and other commercial locations, and how that information will be processed, stored and used for operational and evaluation purposes once it is received.

The VII California testbed architecture will evolve over time. Because California intends to be an early implementer of the national VII system, the ultimate architecture that supports actual operations will be the one adopted by the national VII Working Group. Version 1.0 of this national VII architecture was published in April, 2005 and will be the subject of continuing thorough review and discussion by public and private sector representatives, and testing and refinement leading to later versions, before adoption.

The VII California architecture will be an open architecture that will be designed to enable the testing of various technologies and subsystems, the integration of these technologies and subsystems, and various commercial and governmental applications. Key national activities, such as the development of prototype, standards-compliant DSRC roadside units by the DSRC Industry Consortium, various commercial wireless communications developments, and the implementation of backhaul communications technologies to meet VII requirements, will be closely monitored. The VII California architecture will be developed such that it can grow over time to accommodate these and other developments.

The initial architecture shown in Figure 3-1 is the one that will be implemented for the 2005 World Congress. For expediency, a number of elements or features of Version 1.0 of the national VII architecture will not be included in the initial architecture.

Figure 3-1 VII California World Congress Demo Architecture

The initial VII California architecture will enable the communication of data from equipment located on-board participating vehicles to roadside units deployed at selected locations. From there, the data will be communicated to several locations, including the 511/TravInfo® Travel Information Center, and to OEM processing centers, through a router and the appropriate addressing schemes. Data from the 511/TravInfo® TIC and the OEM locations will also be communicated back to the roadside units, through them to the participating vehicle on-board equipment, and then provided to the driver through audio or visual displays.