Authors : V. Ilayaraja and R. Venkatesan
Abstract: In wireless multimedia transmission, scheduling mechanism needs to be designed in an efficient manner to maintain the traffic stream and enhance the Quality of Service (QoS) for Variable Bit Rate traffic (VBR). In this study, an Enhanced Traffic Aware Scheduling (ETAS) Protocol for VBR Traffic in IEEE 802.11e Wireless Local Area Network (WLAN) is proposed. Here, a queue length notification scheme is used for efficient transmission of queue length and data rate information to QoS Access Point (QAP). Based on the queue length information, Transmission Opportunity (TXOP) is estimated. In case, the data rate is high, overboost scheduling algorithm is used which efficiently deals with traffic stream by transferring excess data to the Enhanced Distributed Channel Access (EDCA). Moreover, to recover the lost TXOP an Unused Time Shifting Scheduling Algorithm is used. Simulation results show that the proposed protocol achieves better bandwidth utilization for VBR traffic with reduced delay.
V. Ilayaraja and R. Venkatesan, 2016. Enhanced Traffic Aware Scheduling Protocol for Variable Bit Rate Traffic in IEEE 802.11e WLAN. Asian Journal of Information Technology, 15: 3631-3639.