IPB-frame Adaptive Mapping Mechanism for Video Transmission over IEEE 802.11e WLANs

By: 
X. Yao, W. Wang, S. Yang, Y. Cen, X. Yao, T. Pan
Appears in: 
CCR April 2014

This paper proposed an IPB-frame Adaptive Mapping Mechanism (AMM) to improve the video transmission quality over IEEE 802.11e Wireless Local Area Networks (WLANs). Based on the frame structure of hierarchical coding technology, the probability of each frame allocated to the most appropriate Access Category (AC) was dynamically updated according to its importance and traffic load of each AC. Simulation results showed the superior performance of the proposed AMM by comparing with three other existing mechanisms in terms of three objective metrics.

Public Review By: 
Joseph Camp

With the rise of on-demand streaming and face-to-face teleconferencing, video traffic now composes more than half of all Internet traffic, a trend which is expected to only increase exponentially. Many of these services require or are significantly enhanced by the use of WiFi networks. However, the everincreasing demand on these networks threatens the viability of video over wireless. This paper takes a hierarchical approach to scheduling video frames based on the level of independence of one frame to the next and using IEEE 802.11e levels of priority. As a result, when bandwidth is scarce, network resources are preserved by discarding highly-dependent frames which may have minimal improvement on the video quality but equally contribute to congestion levels. The resulting frame mapping mechanism scales video quality to the level of available capacity in the network.