SB-DRED: a novel congestion control algorithm for H.264 video streaming over 802.11e

摘要

The IEEE 802.1 le EDCA provides differentiated service for multimedia transmission via in-station multiple access category (AC) queues and virtual collision handling for wireless channel access contention. However, the FIFO nature of ACV1 (AC for Video) limits its performance. To provide further service differentiation among video packets, this paper presents a novel cross-layer design called E-DVFI+SB-DRED, i.e. equal-population-grouping of dispersive-video-frame-importance (E-DVFI) for a precise video importance scheme in the Application layer and segmented-and-bounded dispersive-random-early-detection (SB-DRED) in the MAC layer for a hyperfine video packet mapping algorithm among ACVI and its lower-priority ACs. PSNR-based performance evaluations and comparisons including the effects of video input rate to AC_VI and cross-traffic via the other ACs have been considered over reference video sequences, and the results show that the proposed cross-layer design consistently outperforms the existing ones, including EDCA, I/P+AM, and our previous study DVFI+DRED.