电讯技术2016，Vol.56Issue(10)：1147-1152,6.DOI:10.3969/j.issn.1001-893x.2016.10.015
分布式天线系统中PCF MAC协议的重传性能优化
Retransmission Performance Enhancement of PCF MAC Protocol in Distributed Antenna System
摘要
Abstract
To solve the serious collision under high user density conditions,this paper studies the perform-ance of IEEE 802. 11 Point Coordination Function(PCF) when applied to the distributed antenna system. The relation between the retransmission times and the parameter CFPPeriod ( Contention Free Period Peri-od) of Beacon frame is analyzed while the ratio of CFPMaxDuration( Contention Free Period Max Duration) to CFPPeriod is kept constant. Considering from the aspect of adjusting Beacon interval to improve retrans-mission performance,how the parameter CFPPeriod influences the fairness among stations and the traffic density of network is also analyzed. The OPNET simulation results validate the result that as CFPPeriod keeps increasing,the transmission time increases first then starts to drop,when the ratio of CFPMaxDuration to CFPPeriod is kept constant. The result indicates that when CFPMaxDuration/CFPPeriod is 0. 5,choosing the parameter CFPPeriod among 0. 02~0. 04 s can ensure the fairness among STA(Station)and reduce the number of STA which is about to access the channel at the beginning of Contention Period(CP),so that transmission times can be reduced effectively.关键词
分布式天线系统/点协调机制/MAC协议/重传性能优化Key words
distributed antenna system/PCF mechanism/MAC protocol/retransmission performance enhancement分类
信息技术与安全科学引用本文复制引用
陈玓玏,黄圣春,魏急波..分布式天线系统中PCF MAC协议的重传性能优化[J].电讯技术,2016,56(10):1147-1152,6.基金项目
国家自然科学基金资助项目(61401492)Foundation Item:The National Natural Science Foundation of China(No.61401492) （61401492）
