基于接入控制机制的无线局域网MAC协议  

MAC protocol with admission control mechanism over WLAN

作　　者：赵力强[1] 李璟[2] 赵小冬[3] 张忠灏 

机构地区：[1]西安电子科技大学综合业务网国家重点实验室,陕西西安710071 [2]中国电子科技集团公司第二十研究所,陕西西安710068 [3]中国航空计算技术研究所,陕西西安710068 [4]国家西北电力公司,陕西西安710004

出　　处：《电路与系统学报》2005年第1期103-106,共4页Journal of Circuits and Systems

摘　　要：本文对IEEE802.11无线局域网点协调功能的改进协议(MPCF)的性能进行深入的研究。MPCF基于接入控制和链式轮询机制。根据业务特点,MPCF协议分别为实时业务和非实时业务提供不同的服务策略:实时业务采用ACK应答方式,非实时业务采用无ACK应答方式,从而引入接入控制机制,更好地保证实时业务的服务质量。为了提高网络吞吐量,MPCF协议采用链式轮询机制。本文给出MPCF吞吐量的分析模型。仿真结果表明:MPCF协议的性能优于PCF协议,而且理论分析结果与仿真结果基本吻合。A modified IEEE 802.11 pointed coordination function (PCF) based on admission control and hub-polling scheme, MPCF is analyzed deeply in this paper. After considering the characteristics of real-time and non-real-time traffic, MPCF provides different service policy for them, such as acknowledgement for real-time service and no acknowledgement for non-real-time service, so quality of real-time service is assured better with admission control mechanism. MPCF protocol may improve system throughout greatly by using hub-polling scheme. The analytical model of MPCF throughput is presented in this paper. Simulation results show that MPCF protocol performs better than PCF protocol does and the proposed model is accurate.

关 键 词：无线局域网 点协调功能 服务质量 接入控制 链式轮询 

分 类 号：TN915.9[电子电信—通信与信息系统]