On the basis of studying the standard TCP retransmission mechanism, this paper proposes a method to adopt the theory of adaptive filtering in the field for the estimation of round trip time （RTT）. Then this method i...On the basis of studying the standard TCP retransmission mechanism, this paper proposes a method to adopt the theory of adaptive filtering in the field for the estimation of round trip time （RTT）. Then this method is embedded in TCP for estimation of RTT, and defined as RTT-AF TCP. In the schemes with Only-TCP flow and with TCP and UDP flow fighting for the link, the experiment results were made and analyzed by using the standard TCP and the RTT-AF TCP. The experimental results show higher throughput and lower loss rate of packets by using RTT-AF TCP for data transmission, and achieve excellent effect.展开更多
<p align="justify"> <span style="font-family:Verdana;">Water enters the fountains of Peterhof naturally through a system of locks, canals, reservoirs and springs from the Ropsha heights...<p align="justify"> <span style="font-family:Verdana;">Water enters the fountains of Peterhof naturally through a system of locks, canals, reservoirs and springs from the Ropsha heights, and the height of the jets can vary depending on their filling. Pumps were never used in Peterhof.</span></span></span></a><span><span><span style="font-family:'Minion Pro Capt','serif';"> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">Tourists from all over the world come to see this fountain near famous palaces.</span></span></span><span><span><span style="font-family:'Minion Pro Capt','serif';"> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">The water delivery uses one tube pipe descending from the nearest hill. After the water comes down again in the lake, it flows out through the drain pipe. So even this very high fountain is working without any motor and come</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">s</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> back tube. And many fountains in the world are built according to this method. For hundreds of years of the existence of fountains, it never occurred to anyone to build a second pipe to return the water up the hill. So obviously</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">,</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> it is a one-way method.</span></span></span> </p>展开更多
基金Supported by the National Natural Science Foundation of China （No. 60775058） the Key Project of Ministry of Education of China （No. 107028）.
文摘On the basis of studying the standard TCP retransmission mechanism, this paper proposes a method to adopt the theory of adaptive filtering in the field for the estimation of round trip time （RTT）. Then this method is embedded in TCP for estimation of RTT, and defined as RTT-AF TCP. In the schemes with Only-TCP flow and with TCP and UDP flow fighting for the link, the experiment results were made and analyzed by using the standard TCP and the RTT-AF TCP. The experimental results show higher throughput and lower loss rate of packets by using RTT-AF TCP for data transmission, and achieve excellent effect.
文摘<p align="justify"> <span style="font-family:Verdana;">Water enters the fountains of Peterhof naturally through a system of locks, canals, reservoirs and springs from the Ropsha heights, and the height of the jets can vary depending on their filling. Pumps were never used in Peterhof.</span></span></span></a><span><span><span style="font-family:'Minion Pro Capt','serif';"> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">Tourists from all over the world come to see this fountain near famous palaces.</span></span></span><span><span><span style="font-family:'Minion Pro Capt','serif';"> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">The water delivery uses one tube pipe descending from the nearest hill. After the water comes down again in the lake, it flows out through the drain pipe. So even this very high fountain is working without any motor and come</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">s</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> back tube. And many fountains in the world are built according to this method. For hundreds of years of the existence of fountains, it never occurred to anyone to build a second pipe to return the water up the hill. So obviously</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">,</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> it is a one-way method.</span></span></span> </p>
