The effects of packet reordering in a wireless multimedia environment

C.M. Arthur, D. Girma, D.A. Harle, A. Lehane

Research output: Contribution to conferencePaper

10 Citations (Scopus)


Packet Reordering has been shown to be an ever-increasing phenomenon on the Internet and must be taken into account when considering performance analysis of both fixed, wireless and mixed media networks. Previous work [1] has demonstrated that TCP suffers degraded performance in situations of high packet reordering. This paper will consider why video traffic over UDP also performs badly in situations of high packet reordering, due to the temporal inter-packet dependencies introduced by the MPEG video encoding structure. Wireless networks are especially prone to problems due to the higher levels of link layer retransmissions found in noisy wireless environments. An experimental investigation into the effects of video packet reordering using the Windows Media streaming system is presented. A method for invoking packet reordering is introduced, and a tool for client-side measurements of video quality is presented. Typical measurements of video performance undergoing reordering are shown, with a study of buffering occupancy at the client, and the potential impact this could have on video packet reordering demonstrated.
Original languageEnglish
Number of pages5
Publication statusPublished - Sep 2004
Event1st International Symposium on Wireless Communication Systems (ISWCS 04) - Mauritius, Mauritius
Duration: 20 Sep 200422 Sep 2004


Conference1st International Symposium on Wireless Communication Systems (ISWCS 04)


  • effects
  • packet reordering
  • wireless multimedia
  • environment
  • network traffic analysis
  • quality assessment
  • streaming media

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