QoS improvement for multicast video streaming: A new cross-layer scheme-based mapping, scheduling and dynamic Arbitration Algorithms for Multicast Scalable Video Coding (CMSAA-MSVC)

QoS requirement is a key issue in wireless communication. Today, researchers are giving considerable interest to multicast video transmission. The legacy IEEE 802.11 WLAN standard is one of the most widely adopted technologies for delivering wireless traffic; whereas, QoS is not yet envisaged in this standard. The IEEE 802.11e (EDCA) standard is defined as the best solution to this issue. Yet, EDCA mechanism performs poorly and continues to have serious issues due to adverse condition of the wireless channel. Besides, EDCA cannot satisfy the high bandwidth that a video application requires. Recently, the 802.11aa is addressing the multicast limitation of audio and video transport stream; because EDCA needs improvements to support differentiation between video streams. The question is how to receive efficient multicast streaming video when the source node delivers simultaneously multicast and unicast flows?. This situation encourage us to design a new cross-layer scheme, based on the 802.11aa, to allow efficient and robust multicast transmission over WLAN. Our approach is called Cross-layer scheme-based Mapping, Scheduling and dynamic Arbitration Algorithms for Multicast Scalable Video Coding CMSAA-MSVC. We analyze the performance of the proposed architecture and evaluate it via simulations. Simulation results show that our approach performs better compared to the traditional EDCA mechanism and recent work in terms of E2ED and PSNR.