The non-Hamilton network is divided into a few Hamilton sub-networks, each with a better P-cycle including all the sub-network nodes. Additionally, by adding the judging conditions in the e-cycle searching algorithm based on ring backup VPs mechanism proposed by Sanghyun Ahn, only all the necessary rings are maintained for each link.
根据图论理论，将冗余网状网划分为Hamilton网状网和非Hamilton网状网，在Hamilton网状网中，建立一个包含网络所有节点的保护环；而对于非Hamilton网状网，将其划分为多个Hamilton子网，在每个子网里建立包含子网所有节点的P-Cycle。