IFTP-W: a TCP-friendly protocol for multimedia applications over wireless networks

  • Authors:
  • Hala ElAarag;Andrew Moedinger

  • Affiliations:
  • Stetson University, DeLand, Florida;Stetson University, DeLand, Florida

  • Venue:
  • Proceedings of the 43rd annual Southeast regional conference - Volume 2
  • Year:
  • 2005

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Abstract

Recent growth in the use of multimedia applications on wireless networks is calling for the development of a protocol that is both TCP-friendly and capable of conforming to the constraints of wireless networks. This paper presents IFTP-W, an end-to-end congestion control protocol we designed to meet both requirements. IFTP-W is a TCP-friendly protocol for media streams that allows for applications to choose a section of a packet to be verified by a checksum, with the remaining portion deemed error-insensitive and not checked for corrupted bits. One corrupted bit in a video or audio stream may cause a discolored pixel or distorted millisecond of audio; however, in many codecs, receiving the partially damaged packet results in better overall performance than dropping the packet. IFTP-W allows a greater percentage of packets to be transmitted, resulting in a higher goodput and throughput and hence improved performance over wireless networks suffering high bit error rates.