软件学报
軟件學報
연건학보
JOURNAL OF SOFTWARE
2002年
2期
176-184
,共9页
TCP%ACK%带宽-时延乘积%微分方程
TCP%ACK%帶寬-時延乘積%微分方程
TCP%ACK%대관-시연승적%미분방정
TCP%ACK%bandwidth-delay products%differentiate formula
给出了在高带宽时延乘积网络中无拥塞丢包的TCP缓冲区的占用量的微分方程,然后针对广域网中窗口大小小于网络带宽时延乘积和无线网络中,由于误码丢包而使窗口尺寸无法达到链路带宽时延乘积(如卫星网)的情况,分析了一种基于令牌的Fast-TCP机制,得出基于令牌的ACK延时机制,不仅能够大大减少缓冲区的占用量结论,而且可获得与TCP在无限缓冲区下的同样的吞吐量.还把这个结论推广到多连接的情况,在以前论文中没有涉及.
給齣瞭在高帶寬時延乘積網絡中無擁塞丟包的TCP緩遲區的佔用量的微分方程,然後針對廣域網中窗口大小小于網絡帶寬時延乘積和無線網絡中,由于誤碼丟包而使窗口呎吋無法達到鏈路帶寬時延乘積(如衛星網)的情況,分析瞭一種基于令牌的Fast-TCP機製,得齣基于令牌的ACK延時機製,不僅能夠大大減少緩遲區的佔用量結論,而且可穫得與TCP在無限緩遲區下的同樣的吞吐量.還把這箇結論推廣到多連接的情況,在以前論文中沒有涉及.
급출료재고대관시연승적망락중무옹새주포적TCP완충구적점용량적미분방정,연후침대엄역망중창구대소소우망락대관시연승적화무선망락중,유우오마주포이사창구척촌무법체도련로대관시연승적(여위성망)적정황,분석료일충기우령패적Fast-TCP궤제,득출기우령패적ACK연시궤제,불부능구대대감소완충구적점용량결론,이차가획득여TCP재무한완충구하적동양적탄토량.환파저개결론추엄도다련접적정황,재이전논문중몰유섭급.
In this paper, the authors first provide a close form differentiate formula to analyze the buffer requirement for zero loss of TCP in networks with high bandwidth delay product. Then, A Token Based Fast-TCP algorithm is analyzed and modeled in WANs when the window size is smaller than Bandwidth-Delay Products (BDP) or in satellite networks where window size is not allowed to be larger than BDP because link errors. It proves that Token Based ACKs delay algorithm not only reduce buffer occupancy largely, but also gain the average same throughput as TCP with infinite buffer size as well. The authors also apply the analysis to multiple connection case that is not included in previous work.