Abstract: The concept of the graph form of a blocking optical cross-connector is introduced so as to investigate the blocking situation. The principle is that the blocking node can be replaced by a graph which is composed of nonblocking nodes and capacity limited edges. Three graphs of typical optical cross-connector nodes are demonstrated. Several uniform result are derived from these examples.

Key words: optical cross-connector, graph, blocking, light path algorithm

摘要： 提出了有阻塞OXC节点的图表示方法。该方法的基本思想是用图来替代交换能力受限制的节点，而此图由交换能力不受限制的节点和容量受限的边组成。文中以典型的阻塞OXC节点为例，给出了它们的图表示，并通过例子得出一般的OXC节点图表示求法的一些普遍结论。

关键词: 光交叉互连, 图, 阻塞, 路由算法