在无线体域网环境中，人体作为各种传感器节点的承载体影响着整个网络中的信道特性，使得环境中的信道具有快速时变的特性。
In WBAN, human body which is considered as the carrier of all kinds of sensor nodes will influence the channel characteristic, and this makes the channel time varying.
由于人体的运动有着不同于其他事物运动的规律，无线体域网的动态拓扑变化必然与其他无线传感器网络拓扑变化有很大不同。
Since the body movement is quite different from other kinds of motion, dynamic topology changes of WBAN are also very different from other WSNs.
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