%0 Journal Article
%T An effective feedback control mechanism for DiffServ architecture<br>An Effective Feedback Control Mechanism for DiffServ Architecture
%A Wang Chonggang
%A Long Keping
%A Yang Jian
%A Cheng Shiduan
%A <br>王重钢
%A 隆克平
%J 计算机科学技术学报
%D 2002
%I 
%X As a scalable QoS (Quality of Service) architecture, DiffServ (Differentiated Service) mainly consists of two components: traffic conditioning at the edge of the DiffServ domain and simple packet forwarding inside the DiffServ domain. DiffServ has many advantages such as flexibility, scalability and simplicity. But when providing AF (Assured Forwarding) services, DiffServ has some problems such as unfairness among aggregated flows or among microflows belonging to an aggregated flow. In this paper, a feedback mechanism for AF aggregated flows is proposed to solve this problem. Simulation results show that this mechanism does improve the performance of DiffServ. First, it can improve the fairness among aggregated flows and make DiffServ more friendly toward TCP (Transmission Control Protocol) flows. Second, it can decrease the buffer requirements at the congested router and thus obtain lower delay and packet loss rate. Third, it also keeps almost the same link utility as in normal DiffServ. Finally, it is simple and easy to be implemented. This work is supported by the National ‘863’ High-Tech Programme of China under Grant No.2001AA121052, the Research Fund for the Doctoral Programme of Higher Education (RFDP) of China under Grant No.20010013003, the National Natural Science Foundation of China under Grant No.69972008, and the Nokia China R&D Center. WANG Chonggang received his B.S. degree in communication engineering from the Northwest Polytechnic University (NPU) in 1996, and M.s. degree in communication and information systems from the University of Electronic and Science Technology of China (UESTC) in 1999 respectively. He is currently a Ph.D. candidate of the National Laboratory of Switching Technology and Telecommunication Networks at Beijing University of Posts and Telecommunications (BUPT). His current research interests cover IP QoS, queue scheduling and management, flow control and bandwidth management, wireless networks, and optical Internet. LONG Keping received his Ph.D. degree in 1998 from the University of Electronic and Science Technology of China (UESTC). He is currently a post-doctoral fellow and associate professor in Beijing University of Posts and Telecommunications (BUPT). His research interests include SDH/ATM network survivability, ATM/IP network performance analysis, TCP congestion control enhancement, router queue management and IP QoS mechanisms (Diffeserc and Intserv). He has published over 30 research papers and has finished five key projects as a key researcher and a project manager. CHENG Shiduan is a professor and a Ph.D. supervisor. She graduated from Beijing University of Posts and Telecommunications (BUPT) in 1963. Since then she has been working at BUPT. From 1992 to 1998 she was the head of the Switching and Network Expert Group in the National ‘863’ High-Tech Programme by the Ministry of Science and Technology of China. She has published more than 70 papers and several books in the field of telecommunications.
%K feedback control
%K DiffServ
%K fairness
%K Quality of Service<br>差分服务
%K 服务质量
%K 有效反馈控制机制
%K 体系结构
%K 计算机网络
%K DiffServ
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=F57FEF5FAEE544283F43708D560ABF1B&aid=D8FCAB3569E353E3AACECE71AD3DDB08&yid=C3ACC247184A22C1&vid=BCA2697F357F2001&iid=E158A972A605785F&sid=2B25C5E62F83A049&eid=2B25C5E62F83A049&journal_id=1000-9000&journal_name=计算机科学技术学报&referenced_num=1&reference_num=19