以802.11MAC为研究对象，分析了基于802.11MAC的DCF协议基本原理，基于DCF协议的CSMA/CA算法的性能描述。提出CSMA/CA算法是采用二进制指数退避机制，利用最小退避窗口来进行传输、退避、重传来达到减小发生碰撞次数和减少传输时间，从而实现数据信息传输误差的最小化。%Taking 802.11MAC as the research object, analyzes the basic principle of 802.11MAC based DCF protocols, describe the performance of the CSMA/CA algorithm based on DCF protocol. CSMA/CA algorithm is the binary exponential backoff mechanism, using the minimum backoff window to transmit, retransmission backoff, reduce the collision times and reduce transmission time, minimized so as to realize the data transmission error.
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