Call Admission Control for Aggregate MPEG-2 Traffic over Multimedia Geo-Satellite Networks

This paper presents a novel Call Admission Control (CAC) algorithm based on the statistical multiplexing of VBR traffic. The proposed algorithm is called Statistical Multiplexing based on Discrete Bandwidth levels of GOP rate (SMDB) because the solution is based on the discretization of the GOP rate in a set of bandwidth levels and on the time characteristics of discrete bandwidth levels of MPEG sources. SMDB is compared with another statistical CAC based on the Normal/Lognormal distribution of the GOP rate (SMND). SMDB outperforms SMND in many situations such as high variance around the average video traffic GOP rate of sources and heavy traffic load. The new CAC has been tested in the new generation satellite platform called Digital Video Broadcasting via Return Channel Satellite (DVB-RCS). A high system utilization and multiplexing gain with respect to QoS constraints is obtained.