CAJ | 학술논문

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1000 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.
침대위성통신계통중전수공제협의(TCP)전수성능불이상적문제,설계병실현료일충기우공간통신협의적망관.재망관설계중,우화료Vegas옹새공제산법적삼수,병통과공간통신협의련접표실현료대다련접적지지.위성통신모의계통중적측시결과표명,당위성련로구유고오마솔화대전수연시(대우1000 ms)정황하,해망관적성능여직접사용TCP상비,평균탄토량제고비체10∶1,차다련접정황하각련접지간경쟁대관적공평성표현교위만의.
@@@@Beijing 100871,China;3. Satellite Navigation Laboratory,Department of Electronics,Tsinghua University,Beijing 10080,China) 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.