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Frame delay and loss analysis for video transmission over time-correlated 802.11A/G channels

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Original languageEnglish
Title of host publicationIEEE18th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC'07) Athens, Greece
Place of PublicationAthens
Publisher or commissioning bodyInstitute of Electrical and Electronics Engineers (IEEE)
Pages1 - 5
Number of pages5
ISBN (Print)9781424411443
StatePublished - 3 Sep 2007


Conference18th International Symposium on Personal, Indoor and Mobile Radio Communications (2007)
Abbreviated titlePIMRC
Period1/09/07 → …


This paper presents simulation results for the transmission of unicast MAC frames over 802.11a/g. Fading channel models at various Doppler frequencies are developed to generate time-correlated SNR waveforms. These are then used together with a bit accurate MAC/PHY simulator to estimate the frame loss rate, the transmission delay, and the jitter for a steady flow of transmit frames. Time correlated channels are required to correctly simulate the bursty nature of packet loss in a wireless channel. The Doppler spread is shown to have a strong effect on the performance of the ARQ mechanism in the MAC layer. Delay is computed as the sum of the transmission delay and the accumulated queuing delay in the MAC buffer. Delay and frame loss are compared for time correlated and time uncorrelated fading channels. Compared to the slow fading case, in a fast fading channel fewer retransmissions are required and the end-to-end delay is significantly reduced. When channel conditions are poor the simulated delay and frame loss rate are seriously underestimated when time uncorrelated fading is assumed. To analyze the performance of video codecs, we show that a time correlated channel model must be combined with a dedicated 802.11a/g MAC/PHY simulation.

Additional information

Rose publication type: Conference contribution Additional information: With accompanying conference presentation Sponsorship: This work was partly funded by the Department of Trade and Industry (DTI, UK), Technology Programme project, VISUALISE. Terms of use: Copyright © 2007 IEEE. Reprinted from IEEE 18th International Symposium on Personal,Indoor and Mobile Radio Communications (PIMRC2007). This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

Research areas

  • Wireless LAN, MAC layer, PHY, automatic repeat request, fading channels, Packet Error Rate (PER), video codecs, time-correlated, video transmission, 802.11A/G


18th International Symposium on Personal, Indoor and Mobile Radio Communications (2007)

Abbreviated TitlePIMRC
Duration1 Sep 2007 → …

Event: Conference





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