Abstract
This paper proposes a Novel Cross-layer Mechanism (NCLM) for Improving H.264/AVC Video Transmissions over IEEE 802.11n wireless network. According to the network traffic loads and the importance of the video data, the proposed mechanism dynamically selects the suitable access categories (AC) instead of predefined AC. This proposed novel cross-layer mechanism gives the information about the importance of video packets to the MAC layer. Information about the network traffic load is available from the queue length of all access categories. During this research, we analyzed the performance of NCLM in both light and heavy load over IEEE 802.11n wireless networks. In this research, the performance of video traffic measured by average: Throughput, PSNR, VQM, and SSIM. Simulation results of this research demonstrate that the performance of proposed mechanism was higher in comparison to the results derived from IEEE 802.11n EDCA, CLOT, DACMM, IPB-Frame AMM, and Static Mapping algorithm.
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