Abstract
This paper proposes an algorithm named WLFVC, which is a fully distributed wireless packet scheduling algorithm based on LFVC (Leap Forward Virtual Clock), to provide streams with fairness, especially in the short time scale. This algorithm is able to allocate bandwidth to streams proportional to their weights. Thus, better delay and jitter performance can be achieved. Since collisions and wireless link error degrade the performance of MAC protocols in the WLAN environment, WLFVC also takes them into consideration. Finally, this algorithm works in a fully distributed way and it can coexist with other stations that only support DCF (Distributed Coordination Function).
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This work is supported by the National Research Foundation for the Doctoral Program of Higher Education of China (Grant No.20010013003), the National Natural Science Foundation of China (Grant No.90204003) and NOKIA-BUPT Advanced TCP/IP Network Project.
WU HaiTao was born in 1976. He received his Ph.D. degree from the Beijing University of Posts and Telecommunications (BUPT) in 2003. He is a currently a post-doctor in Microsoft Research Asia (MSRA). His research interests are IP QoS, TCP/IP, differentiated services, wireless networks and peer-to-peer networks.
LIN Yu received his Ph.D. degree from the Beijing University of Posts and Telecommunications (BUPT) in 2003. He is currently a lecturer of the National Laboratory at BUPT. His current research interests cover Internet measurement and analysis, IP QoS and wireless networks.
CHENG ShiDuan is a professor and Ph.D. supervisor. She was born in 1940 and graduated from BUPT in 1963. Since then she has been working at BUPT. From 1984 to 1987 she joined Alcatel Bell Telephone, Belgium, as a visiting scholar. From 1992 to 1998 she was the head of the Switching and Network Expert Group of 863 program, a national high-tech R&D plan organized by the Ministry of Science and Technology of China. She has published more than 100 papers and several books in the field of telecom. She is currently the director of Broadband Networks Research Center in Computer College at BUPT. Her research interests cover ISDN, ATM, TCP/IP, switching software, protocol engineering, network performance, QoS, security and survivability.