双向线路倒换环 meaning in English

bi-directional line switched ring

This dissertation focuses on survivability and self - healing issues of broadband transport networks : the dynamical pre - configuration of the p - cycles , network planning with joint the pre - configuration and the pre - planning method as well as blsr ( bi - directional line - switched ring loading ) loading problem
本文主要研究了宽带传送网络生存性及自愈技术，主要集中在以下几个方面： p - cycle的预先动态配置、预先配置和预先规划相结合的网络规划以及双向线路倒换环（ blsr - bi - directionalline - switchedring ）的业务负载。