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用于卫星通信系统的空间通信协议网关设计
张涛,牛明涛,冯振明
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(总参信息化部驻航天科技集团军事代表室，北京 100015;北京大学信息科学技术学院卫星通信研究中心，北京 100871;清华大学电子学系卫星导航技术实验室，北京 100083)

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。

关键词: 卫星通信空间通信协议参数优化多连接

DOI：

基金项目:

Design of SCPS gateway in satellite communications system

ZHANG Tao,NIU Ming-tao,FENG Zhen-ming

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Abstract:

Due to the unsatisfactory transmission performance of TCP in satellite communications systems,a Space Communication Protocol Specification(SCPS) base d gateway is designed and realized. In the design, the parameters are optimized in Vegas algorithm, and also the support of multiconnection is realized by usi ng SCPS connection form. Test in a simulated satellite communication s system shows when the channel is set to be a high bit error rate and large tra nsmission delay(>1000 ms), the designed SCPS based gateway′s throughput inc reases by 10 times compared with TCP gateway, and the fairness among various con nections is satisfactory in multiconnection mode.

Key words: satellite communications SCPS parameter optimization multi connection mode