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many-to-one机制中,数据上行和APS-ACK的下行报文是同样的路径(经过同一个路由)吗?

Other Parts Discussed in Thread: Z-STACK

如题,many-to-one机制中,终端数据通过路由最终到达协调器,协调器收到终端数据后回复APS-ACK应答帧,该应答帧是原路返回吗?   我说的原路返回指的是和数据上行时经过的路由是同一个节点。

之所以这么问是因为发现开启mang to one机制后,数据上行经过的路由和ZC答复的下行走的不是同一个路由,数据会传输失败(路由器到ZE没有MAC层的ACK帧),想问下是什么原因。