Performance comparison of various Burst Time Plan generation methods in broadband satellite multimedia system

Traditionally the Burst Time Plan (BTP) is always generated periodically in broadband satellite multimedia (BSM) system. Based on the analysis we find that periodical BTP generation (P-BTPG) method can not guarantee the delay performance and channel utilization efficiency simultaneously especially when the capacity requests arrived randomly. The optimized BTP generation (O-BTPG) method is given based on the optimal schedule period and schedule latency without considering the signaling overhead. Finally a novel asynchronous BTP generation (A-BTPG) method is proposed which is invoked according to users´ requests. These three BTP generation methods are compared in a BSM system application scenario. The simulation verified our analysis. Simulation results show that A-BTPG can have a better delay performance than P-BTPG while guaranteeing overhead low. This method can be used in the ATM onboard switching satellite system and further more can be expended to digital video broadcasting-return channel satellite (DVB-RCS) system or IP onboard routing BSM system in the future.