摘要
IEEE 80 2 .11协议的MAC层的有两种控制方式 :中心控制 (PCF)和分布控制 (DCF) ,其中以DCF为主要介质访问控制方式 .DCF以CS MA/CA为主 ,以RTS/CTS消息交换机制为辅 .在PCF下网络中心控制站 (AP)轮询各个工作站实现中心控制方式 .IEEE80 2 .11MAC层采用的主要技术有虚拟载波监听技术 ,帧优先级机制 。
Two main functions used in IEEE 802.11 MAC protocol are: point coordination function (PCF) and distributed coordination function (DCF).CSMA/CA is used as the basic media access control mechanism of DCF while RTS/CTS message exchange mechanism is used as optional media access control mechanism. PCF is realized by Polling mechanism of Access Point. The main technologies of IEEE 802.11 MAC protocol are virtual carrier-sense, random backoff, priority of frames and power save management.
出处
《山东大学学报(工学版)》
CAS
2002年第6期597-600,共4页
Journal of Shandong University(Engineering Science)
关键词
无线电通信
计算机通信网
局部区域网络/无线局域网
Radio communication
Communication networks
Local area networks/Wireless local area networks