IEEE802.11b的媒体访问机制

MAC of IEEE802.11 b

IEEE80 2 .11b采用无线方式传输信息 ,而无线方式传输与有线方式传输相比 ,具有较大的复杂性 ,所以其MAC(媒体访问控制 )机制也更加复杂。论文在较为深入的对IEEE80 2 .11b协议研读后 ,比较详细地阐述了IEEE80 2 .11b的媒体访问机制──CSMA CA(载波监听多路访问 冲突避免 )机制 ,以及在CSMA CA基础上的两种具体实现控制方式──DCF(分布式 )控制方式和PCF(点协调式 )控制方式 ,同时还简要探讨了MAC层的差错控制问题。

IEEE802.11b LAN use wireless media to transmit information. Since the wireless media is more complex than wired media, the MAC layer access controling mechanism of IEEE802.11b is more complex. The thesis describes the MAC layer access controling mechanism of IEEE802.11b--CSMA/CA(carrier sense multiple access/collision avoid) and two implementation modes,which are DCF(distributed coordination function) controling mode and PCF(point coordination function) controling mode. At the same time, the thesis simply introduces the error controling problem.