Delay Analysis and Comparison of OFDM-TDMA and OFDMA under IEEE 802.16 QoS Framework

Abstract

The delay analysis and comparison of OFDM-TDMA and OFDMA using a flow control scheme under the QoS framework of IEEE 802.16 are conducted in this work. We investigate the maximum packet delay performance by deriving delay bounds for several multiaccess modes with different subcarrier/time-slot assignment and bit allocation schemes. The analytical delay bounds provide insights into the performance difference among different multiaccess schemes, and demonstrate each scheme\'s capability of supporting real-time, delay-sensitive multimedia applications. The derived analytical results are verified by computer simulation.