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One can look at the vehicular ad hoc network (VANET) as at the source and storage of information useful for the safety, fluency and comfort of road traffic, which makes it a valuable tool for ITS. Our research is focused on data dissemination in VANET. We perceive the nodes of VANET as the nodes of a distributed database system (DDBS). As such they do not only store data but they also create new data. Normally, in the course of time the data lose their usefulness. The system we designed was tested by means of a computer simulation carried out by the simulation tool AdHocSim.FRI.

This article describes a new architecture of a distributed database system, which is designed especially for the dynamic networks environment. Problems with the architecture of a traditional distributed database system are explained, and a solution is offered. The architecture introduced in this article does not intend to be a universal database system. It is a specialized solution for the implementation of distributed database systems in the dynamic networks environment.

The article introduces basics of classic Distributed Database System (DDBS) and explains its unsuitability for dynamically changing networks such as Vehicular Ad-hoc Network (VANET). Thus a concept of a new architecture is proposed. This new architecture is designed for use in mobile networks as it solves problems of classic architecture, however as explained at the end of the article, it has some limitations of its own.