The Effects Of background Traffic on the End-To-End Delay for Video Streaming Applications over IEEE 802.11B WLAN Networks

Abstract

The bursty nature of video streaming applications is due to the frame-based structure of video and this has an important impact on the resource requirements of the WLAN, affecting its ability to provide Quality of Service (QoS) particularly under heavily loaded conditions. In this paper we analyse this bursty behaviour in depth. We show how each video frame is queued at the AP causing the packet delay to vary in a sawtooth manner that is related to the frame rate, the number of packets per video frame, and the packet size. We infer the maximum background traffic load that can be supported so that it does not negatively impact on the video streaming application. We demonstrate that there is a critical threshold load value above which the AP can no longer reliably support the video stream and compare it to the threshold load values calculated through analysis. Using this knowledge, the AP can employ resource allocation mechanisms to regulate the incoming traffic to the AP transmission queue so that QoS can be provided for streaming applications.

Communications Support for Disaster Recovery Operations using Hybrid Mobile Ad-Hoc Networks

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The Active Buffer Management Scheme using Virtual Transmission Delay in the IEEE 802.11e Network

“…Due to the advance of the WLAN technology and the internet protocol, the scheme which provides the video streaming service in the home network or CCTV monitoring for cars or construction materials is addressed in many researches [1]- [3]. However, these researches may not guarantee the QoS of the video streaming service because they do not consider the property of the video traffic such as MPEG-4.…”