Abstract: In order to provide Quality-of-Service (QoS) guarantees for multimedia services in the broadband satellite communication system,the system QoS framework was designed based on Diffserv. An integrated system design was carried out both on the satellite and the user terminals. The onboard dynamic resources assignment scheme was proposed by improving Combined Frec/Demand Assignment Multiple Access (CFDAMA). A two-stage terminal queuing and scheduling strategy was presented. The broadband multimedia satellite communication hardware in-th}loop simulation system was developed, the measurements show that our system can bearer real-time multimedia services very well.The results are similar to the real system tests.

Key words: Satellite communication, Multimedia, QoS, Simulation