CAJ | 학술논문

根据海上船舶网络的特点及其业务需求，深入分析了该有线/无线混合网络中影响TCP（Transmission Control Protocol ，传输控制协议）传输性能的主要因素。其中，着重研究了船舶间MANETs(Mobile Ad hoc Networks,移动自组织网)的影响，该网络存在一些固有局限，使得传统的 TCP 协议应用于其中时效率低下。在分析对比目前业界改进 MANETs中 TCP性能的一些热点方案的基础上，提出了一种海上船舶有线/无线混合网络中基于 TCP的业务传输解决方案。该方案是一种“端到端”的解决方案，包括三部分：即有线部分、接入服务器以及无线部分。有线部分采用标准的 TCP协议；无线部分采用改进的 TCP协议或者是UDP协议承载，以改善TCP协议在MANETs中的性能；接入服务器连接有线和无线部分，具有协议转换功能。利用QualNet进行仿真分析，结果表明，与传统TCP协议相比，该改进方案吞吐量有显著提高。
근거해상선박망락적특점급기업무수구，심입분석료해유선/무선혼합망락중영향TCP（Transmission Control Protocol ，전수공제협의）전수성능적주요인소。기중，착중연구료선박간MANETs(Mobile Ad hoc Networks,이동자조직망)적영향，해망락존재일사고유국한，사득전통적 TCP 협의응용우기중시효솔저하。재분석대비목전업계개진 MANETs중 TCP성능적일사열점방안적기출상，제출료일충해상선박유선/무선혼합망락중기우 TCP적업무전수해결방안。해방안시일충“단도단”적해결방안，포괄삼부분：즉유선부분、접입복무기이급무선부분。유선부분채용표준적 TCP협의；무선부분채용개진적 TCP협의혹자시UDP협의승재，이개선TCP협의재MANETs중적성능；접입복무기련접유선화무선부분，구유협의전환공능。이용QualNet진행방진분석，결과표명，여전통TCP협의상비，해개진방안탄토량유현저제고。
According to the characteristics and the service demanding of the maritime ship networks, the main factors that affect the transmission performance of the Transmission Control Protocol(TCP) in the wired and wireless hybrid networks is analyzed, and the survey is concentrated at the effect of Mobile Ad hoc Networks (MANETs) that have some inherent limitations among the ships, which causes the lower efficiency of the tradi-tional TCP. Based on the analysis and comparison of several hot schemes to improve the performance of TCP in MANETs, a solution for data transmission based on TCP in the wired and wireless hybrid maritime ship networks is proposed. This solution is end to end, and it includes wired part, access server and wireless part. Standard TCP is adopted in the wired part. The modified TCP or UDP is adopted in the wireless part, which aims to improve the performance of TCP in MANETs. The access sever which had protocol conversion function connects the wired and wireless parts. The simulation results based on QualNet simulator shows that the throughput of the improved scheme increased obviously, compared with the traditional TCP.