Analytical analysis of QoS for lossy network congestion control

Abstract

This paper develops the analytical models necessary to compare the Quality of Service (QoS) when using different lossy network congestion control techniques. The first route model shows that the frequency (FRQ) drop method is superior to the random (RND) drop method when the perceived difference in QoS (ΔQoS) from the full transmission mode to the lower transmission mode is small and that the ratio (x) of number of shrunk packets to 1 dropped packet is low. Afterwards, this model is extended to show the QoS when packet loss concealment is used. Later, this model is extended to show the QoS when buffering is allowed. Final results show that if the constraint (QoSWB — AVGQoSPLC > x x (QoSWB — QoSNB)) is met then the RND method achieves worse QoS than the FRQ method. This result holds with and without buffering.