Adaptive Transmission Scheme in IEEE 802.16 WMAN with Error Prone Channel

Abstract

The wide area wireless network (IEEE 802.16 WMAN) supports integrated services such as constant bit rate voice, variable bit rate video, high speed FTP and low speed www data. Efficient resource management in such network is a real challenge because of QoS requirements of integrated services and the error prone nature of the radio channel. In this paper, we mainly focus on the efficient packet transmission mechanism in such network. We propose an efficient channel prediction scheme which combines the handshake probing and prediction together to probe the channel state before transmission. Based on the maximum tolerant BER of different services, channel state is classified into three different states and an adaptive packet transmission scheme for all services under different channel states is introduced. The performance of the proposed schemes are evaluated and the results verified by using extensive simulations.