摘要
针对卫星通信系统中传输控制协议(TCP)传输性能不理想的问题,设计并实现了一种基于空间通信协议的网关。在网关设计中,优化了Vegas拥塞控制算法的参数,并通过空间通信协议连接表实现了对多连接的支持。卫星通信模拟系统中的测试结果表明,当卫星链路具有高误码率和大传输延时(大于1 000 ms)情况下,该网关的性能与直接使用TCP相比,平均吞吐量提高比达10∶1,且多连接情况下各连接之间竞争带宽的公平性表现较为满意。
Due to the unsatisfactory transmission performance of TCP in satellite communications systems, a Space Communication Protocol Specification（SCPS） based gateway is designed and realized. In the design, the param- eters are optimized in Vegas algorithm, and also the support of multi-connection is realized by using SCPS con- nection form. Test in a simulated satellite communications system shows when the channel is set to be a high bit error rate and large transmission delay （ 〉 1000 ms）, the designed SCPS based gateway＇s throughput increases by 10 times compared with TCP gateway, and the fairness among various connections is satisfactory in multi-con- nection mode.
出处
《电讯技术》
北大核心
2013年第3期335-340,共6页
Telecommunication Engineering
关键词
卫星通信
空间通信协议
参数优化
多连接
satellite communications
SCPS
parameter optimization
multi-connection mode
