针对目前无线网络的运行现状，指出传统无线数据交换模型的不足，因此提出无线数据交换系统的改进模型，并举例说明了该模型的技术实现。
The shortages of traditional mobile data interchange system under current wireless network are obvious. In the paper, an improved module is brought forward and its realization is talked.
改进的通讯方案增强了上位机和下位机之间数据交换的实时性。
The improved communicative scheme enhances the ability of real time of data exchange between host computer and slave computer.
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