卫星网络中基于丢包区分的TCP跨层改进  

TCP Cross-layer Improvement Based on Packet Loss Discrimination in Satellite Network

作　　者：刘海燕 周华宇[1,2] 魏德宾[1,2] 

机构地区：[1]辽宁省通信网络与信息处理重点实验室 [2]大连大学信息工程学院,辽宁大连116622

出　　处：《计算机工程》2012年第15期97-99,107,共4页Computer Engineering

基　　金：国家"863"计划基金资助项目(2010AAXX01);辽宁省科技厅基金资助项目(2010007)

摘　　要：为解决TCP-Casablanca算法在卫星网络中无错误控制机制的问题,提出一种适合卫星网络的新算法——BQM_Sat。该算法在丢包区分方法的基础上,根据ACK的反馈情况跨层判断信道误码状况,并实现物理层调制方式的跨层自适应,可满足传输系统对于发送速率或抗噪性能的要求。仿真结果表明,BQM_Sat算法能提高卫星网络的吞吐量及链路的带宽占用率,保证网络的稳定性。In order to solve the problem of poor performance of TCP-Casablanca algorithm when it is implemented in the satellite network, a new algorithm called Bias Queue Management on Sat（BQM_Sat） for the satellite network is proposed. Based on the loss discrimination algorithm, BQM_Sat can judge the bit error status of the channel according to the feedback of ACK and change the modulation mode automatically with physical layer to meet the requirements of sending rate and anti-noise performance for the transmission system. Simulation results show that BQM_Sat algorithm can significantly improve the throughput and the link bandwidth utilization of the satellite network as well as guarantee the stability of the network.

关 键 词：卫星网络 TCP跨层改进 丢包区分 区分队列管理 链路错误控制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]