Effect of Heavy Real-Time Service on Subscribers Number Based on 802.16e

Abstract

Video conference service is an application that offers video and audio at the same time, and it is one of the real-time applications that deplete the capacity of any system significantly. Fortunately, the IEEE 802.16e standard offers a specific quality of service that can support the desired applications for a limited number of users as there is a tradeoff between the quality and quantity of system capability. In this paper, the number of subscriber units which can be served successfully by a single base station based on the IEEE 802.16e standard for different video conference applications has been evaluated in three cases depending on the circumstance of the end terminal case in terms of modulation and coding rate schemes: the worst case, the random case, and the perfect case. Due To our best knowledge, this paper considered as the first one deals with the capacity in these three cases in term of modulation schemes. The metrics of performance for this study are the end-to-end delay (ETE), the difference between the received to transmitted traffic, the delay variation for different video conference applications, and the amount of the free resources of the cell.