Robust video transmission over wireless LANs

PL Ferre, A Doufexi, J Chung-How, AR Nix, DR Bull

Research output: Contribution to journalArticle (Academic Journal)peer-review

17 Citations (Scopus)
396 Downloads (Pure)


Home wireless networks are mainly used for data transmission; however, they are now being used in video delivery applications, such as video on demand or wireless internet protocol (IP) television. Off-the-shelf technologies are inappropriate for the delivery of real-time video. In this paper, a packetization method is presented for robust H.264 video transmission over the IEEE 802.11 wireless local area network (WLAN) configured as a wireless home network. To overcome the poor throughput efficiency of the IEEE 802.11 Medium Access Control (MAC), an aggregation scheme with a recovery mechanism is deployed and evaluated via simulation. The scheme maps several IP packets (each containing a single H.264 video packet called a Network Abstraction Layer (NAL) unit) into a single larger MAC frame. Video robustness is enhanced by using small NAL units and by retrieving possible error-free IP packets from the received MAC frame. The required modifications to the legacy MAC are described. Results in terms of throughput efficiency and peak-signal-to-noise ratio (PSNR) are presented for the case of broadcast and real-time transmission applications. Compared to the legacy case, an 80% improvement in throughput efficiency is achieved for a similar PSNR video performance. For fixed physical layer resources, our system provides a 2.5-dB gain in video performance over the legacy case for a similar throughput efficiency. The proposed solution provides considerable robustness enhancement for video transmission over IEEE 802.11-based WLANs
Translated title of the contributionRobust video transmission over wireless LANs
Original languageEnglish
Pages (from-to)2596 - 2602
Number of pages7
JournalIEEE Transactions on Vehicular Technology
Issue number4
Publication statusPublished - Jul 2008

Bibliographical note

Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Rose publication type: Journal article

Terms of use: Copyright © 2008 IEEE. Reprinted from IEEE Transactions on Vehicular Technology.

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  • Medium Access Control (MAC)
  • packetization
  • peak-signal-to-noise ratio (PSNR)
  • video transmission
  • wireless local area networks


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