In DCF, we put special emphasis on the carrier-sense mechanism, MAC-Level acknowledgments, interframe space (IFS), random backoff time, and DCF access procedure, then we use Markoff chain to analyze the performance of DCF access.

• 对DCF中的载波检测、MAC级确认、帧间隔、随机退避时间和DCF访问过程进行了重点研究,利用马尔可夫链分析了DCF接入方式的性能。