Measurement-based CAC for video applications using SBR service

This paper provides a conservative estimation of the required bandwidth for video sources multiplexed according to the bu erless scheme and using the Statistical Bit Rate transfer capability in ATM networks. For sources with sustainable bit rate signi cantly greater than the mean bit rate as expected for video teleconference streams, we consider an estimation of the required bandwidth simply based on the measure of the link load. On the other hand, for video sources encoded using an algorithm such as that presented in 8 , we propose that this estimation be based on the measured variance of the total bit rate of already accepted sources. In both cases, the required bandwidth is calculated independently of any speci c source model. This leads to a simple CAC policy which signi cantly increases the bandwidth saving with respect to the classical worst-case framework.

• Type: Conference
• Year: 1997
• Where: IFIP
• Authors: F. Brichet, Alan Simonian
• Keywords: Bit Rate, Bit Rate Transfer, IFIP 1997, Programming Languages, Required Bandwidth