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: |
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基金项目: |
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Design of SCPS gateway in satellite communications system |
ZHANG Tao,NIU Ming-tao,FENG Zhen-ming |
() |
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 multiconnection 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 multiconnection mode. |
Key words: satellite communications SCPS parameter optimization multi connection mode |