Multimedia GEO Satellite Architecture based on DVB-RCS: Admission Control Issue for High Interactivity Traffic Sources

摘要

Multimedia satellite systems are viewed as viable service vehicles for traditional entertainment broadcasting. They are also potential supplements for the existing wire-line and legacy networks in meeting the increasing demand for Internet and multimedia oriented broadband access at demographically dispersed areas. The main objective of this work is the comparison of a new Connection Admission Control (CAC) algorithm that guarantees an elevated multiplexing level and also a good quality of service to real-time multimedia traffic sources mapped over DVB-RCS standard service classes with a well-known Iterative CAC mainly designed for the managing of real-time bursty traffic sources. Simulation results show that the performances of the proposed CAC, compared with the previous one, are the same but the last one has a very low computational complexity. In particular, the proposed scheme is based on a few elementary sums and products operations and has a linear computational complexity while the reference algorithm presents a quadratic one. Both algorithms guarantee the agreed QoS to real-time bursty connections that are more sensitive to delay jitter but the proposed one can manage also real-time multimedia traffic sources with high interactivity data level.