(PCF中文)2007119163812指南.pdf

1000-9825/2005/16(07)1296 ©2005 Journal of Software 软 件 学 报 Vol.16, No.7 ∗ 具有最低竞争吞吐率保证的准入控制算法 付晓蕊, 张连芳+ (天津大学 计算机科学与技术系,天津 300072) An Admission Control Algorithm with Minimum Contending Throughput Guarantee FU Xiao-Rui, ZHANG Lian-Fang+ (Department of Computer Science and Technology, Tianjin University, Tianjin 300072, China) + Corresponding author: Phn: +86-22 Fax: +86-22 E-mail: lfzhang@, Received 2003-12-22; Accepted 2004-08-10 Fu XR, Zhang LF. An admission control algorithm with minimum contending throughput guarantee. Journal of Software, 2005,16(7):1296−1304. DOI: 10.1360/jos161296 Abstract: In this paper, the performance of integrating real-time and non real-time traffic in the PCF (point coordination function) mode of IEEE 802. 11 is studied, and a novel real-time traffic admission control algorithm is proposed. By changing the admission threshold dynamically according to the current load of non real-time traffic and polling the admitted real-time nodes according to their service index, the proposed algorithm can provide parameterized QoS (quality of service) for real-time traffic, while at the same time, keep the throughput of non real-time traffic at an acceptable level. The validity of the admission control algorithm is verified by simulation. Key words: IEEE 802.11; PCF (point coordination function); QoS (quality of service); admission control 摘 要: 研究了IEEE 802. 11 PCF(point coordination function)机制下集成实时业务和非实时业务的性能,提出 了一种新的实时业务准入控制算法.该算法根据网络中的非实时业务负载情况动态计算准入阈值,并对准入的 实时业务结点按服务指标进行轮询,从而在对实时业务提供参数化QoS(quality of service)的同时,使非实时业务 吞吐率保持在可接受的水平上.仿真实验验证了算法的有效性. 关键词: IEEE802.11;PCF(point coordination function);QoS(qualit