由于MAC服务在一台终端工作站内以抽象接口的方式提供，因此它不可能指定合适的总数据包传输延时。
Since the MAC Service is provided at an abstract interface within an end station, it is not possible to specify the total frame transit delay precisely.
对无线数据传输系统的构成进行了研究，阐述了基于C8051F 020微处理器和CD MA模块MG801A的数据终端的硬件设计电路和软件接口的实现。
The paper introduces structure of wireless data transmission system, and expounds realization of hardware design circuit and software of DTU based on C8051F020 microprocessor and CDMA module MG801A.
整个图像通信系统由图像采集、图像信号的处理和控制、USB传输和控制、系统接口以及终端的图像还原和存储等几部分组成。
The entire image communication system consists of image capture, image signal processing and the control, the USB transmission and the control, the terminal image return and storage and so on.
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