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从光纤互连的角度分析了车载数据网络中访问方法的使用。研究显示它们的特性与节点数、包长和节点间的距离相关。统计分析了预留法的访问延迟和最大吞吐量。结果表明:星形拓扑的传播延迟最低,对IEEE802.5非常有用,但是访问方法较难实现,且最大吞吐量与节点数有关;光纤分布式数据接口(Fiber Distributed Data Interface,FD-DI)环适合比特率高的网络,最大吞吐量与节点数无关;令牌总线的吞吐量固有地小于令牌环。
From the point of view of optical fiber interconnection, it analyzes the use of access method in vehicle data network. Research shows that their characteristics are related to the number of nodes, the length of the packet, and the distance between the nodes. Statistical analysis of the access method of access delay and maximum throughput. The results show that the star topology has the lowest propagation delay and is very useful for IEEE802.5. However, the access method is difficult to achieve and the maximum throughput is related to the number of nodes. Fiber Distributed Data Interface (FD-DI) ring Suitable for networks with high bit rates, the maximum throughput is independent of the number of nodes; the throughput of the token bus is inherently smaller than the token ring.