为了很好地利用移动信道，CDPD系统有一个功能复杂的MAC(媒质接入控制)层。
The CDPD system has a complex media access control (MAC) layer in order to make full use of mobile channels.
在信道接入中为了提高包转发的效率，本文对802.11的MAC层控制帧做出一点改进。
In this thesis, we make a slightly modification for the control frame of the 802.11 MAC layer to enhance the transmission efficiency of packets in channel accessed.
在信道接入中为了提高包转发的效率，本文对802.11的MAC层控制帧做出一点改进。
In this thesis, we make a slightly modification for the control frame of the 802.11 MAC layer to enhance the transmission efficiency of packets in channel accessed.
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