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怎么知道父节点已经丢失子节点信息



父节点有一个关联表,保存有子节点信息,如果父节点长期检测不到子节点后擦除掉该子节点记录,然后子节点又突然在线了(NV_RESTORE),遇到这种情况,应该怎么处理?

我希望我的子节点能够向父节点检测是否还在其列表内,如果不在,重新加入网络或者选择一个新的路由加入网络,这种应该怎么处理?