A RED-FEC Mechanism for Video Transmission Over WLANs

This paper proposes a Random Early Detection Forward Error Correction (RED-FEC) mechanism to improve the quality of video delivered over Wireless Local Area Networks (WLANs). In contrast to previous FEC schemes, in which the rate determination information is fed back from the receiver side, in our p...

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Bibliographic Details
Published in:IEEE transactions on broadcasting 2008-09, Vol.54 (3), p.517-524
Main Authors: Cheng-Han Lin, Ce-Kuen Shieh, Chilamkurti, N.K., Chih-Heng Ke, Wen-Shyang Hwang
Format: Article
Language:English
Subjects:
Automatic repeat request
Delay
FEC
Feedback
Forward error correction
Local area networks
Mathematical analysis
Mathematical models
Networks
packet loss
Personal digital assistants
Receivers
Redundancy
Streaming media
Streams
Telecommunication traffic
video quality
Video transmission
Wireless communication
Wireless LAN
Wireless networks
WLAN
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Summary:This paper proposes a Random Early Detection Forward Error Correction (RED-FEC) mechanism to improve the quality of video delivered over Wireless Local Area Networks (WLANs). In contrast to previous FEC schemes, in which the rate determination information is fed back from the receiver side, in our proposed method, the redundancy rate is calculated directly at the wireless Access Point (AP) in accordance with the network traffic load, as indicated by the AP queue length. An analytical model is developed to predict the effective packet loss rate of a video stream delivered over a WLAN with RED-FEC protection. The numerical results show that the proposed RED-FEC mechanism consistently achieves higher recovery efficiency than a conventional FEC scheme under high and low network loading conditions.
ISSN:0018-9316
1557-9611
DOI:10.1109/TBC.2008.2001713