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你好，我的路由器A建立的时候是父节点是另外一个路由器B，当这个父节点B的关闭后，协调器器就收不到路由去A发出的“hello world”信息了，而路由器其实是在协调器的网络信号范围内的，即便还有其它路由器，也不会重新加入网络，请问我错在哪了？
