Fault detection is to identif ~ ? a fault after they occurred . detected abnormalities are then filtered . subsequent fault localization is to determine the location of the fault 故障检测阶段的目的是在故障发生以后，尽可能地将其识别出来；检测出的异常事件经过过滤，将进入故障定位处理；故障定位阶段的目的是确定网络中故障的位置。
