Based on recommendations and drafts published by ITU-T and OIF,respectively,the principle for an ASON to be partitioned hierarchically and to be routed is described and is demonstrated with the form of the hierarchical routing in the paper.

• 本文基于国际电信联盟电信标准化组织(ITU-T)相关标准及光互联论坛(OIF)有关草案,阐述了路由域分层的一般原则,给出了层次路由体系下实现路由功能的一般性原理,提出了分层路由体系下路由的实现方法。