江苏高速公路通信时钟同步网的设计

Communication Clock Synchronization Network Design of Jiangsu Province Expressway

结合我国高速公路网的发展状况:各路段通信网日益互联,并逐步形成统一的网状结构,同时联网收费正在进行,图像监控数据等宽带传输趋于向全网拓展,指出时钟同步的重要性和建立时钟同步网的必要性。为此,本文分析时钟同步网设计需考虑的因素,提出基于BITS三级时钟的江苏高速公路时钟同步网设计方案,其中包括网络的拓扑结构、时钟分层、时钟设置、时钟分配、时钟的监控管理等内容。该方案结合江苏高速公路通信网的特点,具有层次分明、可靠实用、可操作性强等优点,有助于今后我国高速公路通信时钟同步网的具体实现。

In view of the development of the expressway communication system in China, such as the connection of section networks, transmission of networked toll collection data and supervision picture data, this article emphasizes the importance and necessity of establishment of synchronization network of the expressway. Considering several important factors necessary for the network system for the expressway of Jiangshu Province etc, this article also presents the design of the Three Layer Clock Synchronization Network of expressway of Jiangshu Province. The design, based on BITS, includes the structure of network, the clock layer, clock configuration, timing signal distribution, as well as the administration of networks. It is beneficial to the establishment of the unitive clock synchronization network throughout the whole country, with such advantages as clear layered structure, practical reliability and operability.