关键词: 宽带卫星网络, 跨层设计, 带宽分配, 服务质量

Abstract: Due to the characteristic of the DVB-RCS，long latency and high bit error probability will influence the performance of the TCP traffic.The traditional protocol design method don’t adapt to the dynamic variable network.This paper proposes the cross layer design scheme which combined the transport layer’s characteristic of TCP，the access scheme of MAC layer and the adaptive modulation and coding of physical layer to increase the performance of TCP.The simulation results show that compared with traditional method，the cross-layer scheme can increase the delay performance and channel utilization.

Key words: broadband satellite network, cross-layer design, bandwidth allocation, Quality of Service（QoS）