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Abstract:

The Traffic Flow Description (TFD) is a new option of the IP protocol, designed by the Authors for Quality of Service (QoS) signaling. In contrast to the traditional, long-term, RSVP-based signaling, which is able to serve only static QoS assurance, the TFD option provides signaling on different time horizons, enabling dynamic QoS assurance. The TFD option conveys information about forthcoming traffic (bit rate in a given time horizons), which is taken from analysis of the sending data stream. The option is specified in an IETF's working document (Internet Draft) and was tested for video transmission.

Papers about TFD-based reservations, previously published by the Authors, report results of experiments that were carried out using a constant time horizon. This paper discusses the usage of the TFD option for dynamic QoS assurance, where a variable time horizon (based on scene detection and analysis of the frames of the sending movie) was used. Results show that scene analysis can be a useful tool for dynamic QoS assurance.

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TFD-Capable Dynamic QoS Assurance Using a Variable Time Horizon Based on Scene Changes