| In order to find a cost-effective solution for combining pricing, admission control, buffer management and scheduling in DiffServ networks, we propose ConTax-CHOKeW framework. ConTax is a distributed admission controller that works in edge routers, while CHOKeW, designed in our previous research for core networks, is a buffer management scheme. Since a user in a higher priority class requests more bandwidth that is differentiated by CHOKeW, ConTax uses the sum of priority classes for all admitted users to measure the network load. When the network load is heavier, ConTax charges a higher price for each priority class. The price includes a basic price and an extra price called congestion tax. By using simulations, we show that ConTax is capable of controlling the network load as well as the number of users that are admitted into the network. In addition, by employing ConTax, network providers can gain more profit, and users have greater flexibility that in turn meets the specific needs for their applications. |
| Shushan Wen received the B.E. degree from the Department of Electronic Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, China, in 1996, and the Ph.D. degree from the Institute of Communication and Information Engineering at the same university in 2002. Currently he is a Ph.D. candidate at the Department of Electrical and Computer Engineering, University of Florida. His research interests include traffic engineering, congestion control, admission control, TCP protection, fairness and QoS in wired and wireless communication networks. He is a student member of IEEE.
Yuguang Fang received the Ph.D. degree in systems and control engineering from Case Western Reserve University, Cleveland, OH, in January 1994 and the Ph.D. degree in electrical engineering from Boston University, Boston, MA, in May 1997. From June 1997 to July 1998, he was a Visiting Assistant Professor at the Department of Electrical Engineering, University of Texas at Dallas. From July 1998 to May 2000, he was an Assistant Professor at the Department of Electrical and Computer Engineering, New Jersey Institute of Technology. In May 2000, he joined the Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, where he got the early promotion to an Associate Professor with tenure in
August 2003 and a Professor in August 2005. He has published over 100 papers in refereed professional journals and conferences. He received the National Science Foundation Faculty Early Career Award in 2001 and the Office of Naval Research Young Investigator Award in
2002. He is currently serving as an Editor for many journals including IEEE TRANSACTIONS ON COMMUNICATIONS, IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, IEEE TRANSACTIONS ON MOBILE COMPUTING, and ACM Wireless Networks. He is an IEEE senior member. |