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协调器如何能知道终端的父节点呢--在线等

如题,协调器如何能知道终端的父节点呢?

跪求最简便的方法。

目前有一个方法,但是感觉有点麻烦。感觉有点土

  如下:

     终端把自身的父节点发送给协调器。

谢谢