Analysis of multimedia access protocols for shared medium networks

AbstmctThe objective of this paper is t o propose a methodology and framework for integrating different MAC protocols into a single shared medium network t o efficiently accommodate various types of multimedia t r d c streams with different characteristics and QoS demands. In particular, we propose an integrated M A C protocol which is termed Multimedia Medium Access Control (Multimedia-MAC) protocol t ha t can efficiently and simultaneously serve three types of multimedia traffic streams: A constant-bit-rate (CBR) traffic and two classes of variable-bit-rate (VBR) traffic. We have developed a queuing system with vacation model and multiple priority queuing system t o establish a mathematical framework for the analysis and performance evaluation of our Multimedia-MAC protocol besides using extensive computer simulations. The main purpose of our performance analysis and evaluation is t o assess our Multimediw MAC protocol in its provision of QoS guarantees under a variety of realistic traffic and networking parameters. More importantly, our theoretical analysis results in an efficient approach t o estimate the QoS of a shared medium network for given dead-line missing rate (DMR) vs network traffic load, that leads t o more accurate admission control and higher network utilization in multimedia communication. The simulation results show that our approach can have accurate estimation in a wide range of tafflc load and deadline requirement.