Firstly, the communication problems in intelligent transportation system are summarized, and then the hierarchical structure of communication network in ITS is proposed. Aiming at the problems existing in the communication of ITS bottom layer, a solution is proposed by analyzing fieldbus technology and FF bus, which still adopts the widely accepted communication standard at the high level and adopts fieldbus at the bottom level. In order to illustrate the problem, the article introduces the concept system of field control layer communication network built by the author based on FF fieldbus.
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