| Abstract: | In this paper, a media access control (MAC) protocol is proposed for multimedia traffic in slotted CDMA wireless communication systems. The channel resource is partitioned into four compartments: video, voice and data compartments, and common resource pool (CRP) which can be used by either voice or data. Video is only permitted to use its pre-allocated channels. Besides assigning voice to its own compartment, a threshold type decision policy is introduced to regulate voice call admission control in CRP. Data can use not only data and CRP compartments, but also the idle capacity of both video and voice. The proposed protocol provides a simple and flexible resource allocation decision for the multimedia traffic such that the bandwidth can be utilized efficiently while satisfying the quality of service (QoS) requirement for each traffic category. Two mathematical analysis methods are applied to evaluate the system performance. The first, Traditional Markov Analysis (TMA) is used to calculate the video and the voice blocking probabilities, and the second, Transient Fluid Analysis (TFA) is adopted to evaluate the average data delay and the channel utilization. Computer simulations verify the accuracy of mathematical models.Miao Ma received the B.Eng. and M.Eng. degrees in Electrical Engineering from Harbin Institute of Technology, China in 1992 and 1996, respectively, and the Ph.D degree in Electrical and Electronic Engineering from Nanyang Technological University, Singapore in 2003. She is a research scientist in the Institute for Infocomm Research in Singapore. Her research interests include network security, media access control, wireless communications and computer networking.Erry Gunawan received the B.Sc. degree in electrical and electronic engineering from the University of Leeds, U.K., in 1983 and the M.B.A. and the Ph.D. degrees, both from Bradford University, in 1984 and 1988, respectively. From 1984 to 1988, he was a Satellite Communication System Engineer at Communication Systems Research Ltd., Ilkley, U.K. In 1988, he moved to Space Communication (SAT-TEL) Ltd, Northampton, U.K. He joined the School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, in 1989, and currently, he is an Associate Professor in the same school. His research interests include the fields of digital communications, mobile and satellite communications, error coding, and spread spectrum. He has published over 60 international research papers and has been a consultant to a local company on the study of DECT system and BLUETOOTH. |
