The paper proposes a Markovian approach to the performance evaluation of the ESSE (Early Slow Start Exit) modification of the TCP congestion control mechanism. ESSE takes advantage of estimations of the optimal pipesize at the sender side to properly select the initial slow start threshold. Previous simulative experiments have shown that ESSE allows to speed-up TCP connections and significantly reduce the packet drop rate at the bottleneck. This work makes a step further in understanding the ESSE behavior by developing a model of TCP source to evaluate the influence of different settings of slow start threshold on TCP performance. As confirmed by comparison with simulations, the model provides, in significant less time than simulations, accurate estimates of typical performance indicators such as the average completion time and average drop rate of short-lived TCP connections.
A Simple Markovian Model of TCP Startup Behavior
GIORDANO, STEFANO;PAGANO, MICHELE;PROCISSI, GREGORIO;
2005-01-01
Abstract
The paper proposes a Markovian approach to the performance evaluation of the ESSE (Early Slow Start Exit) modification of the TCP congestion control mechanism. ESSE takes advantage of estimations of the optimal pipesize at the sender side to properly select the initial slow start threshold. Previous simulative experiments have shown that ESSE allows to speed-up TCP connections and significantly reduce the packet drop rate at the bottleneck. This work makes a step further in understanding the ESSE behavior by developing a model of TCP source to evaluate the influence of different settings of slow start threshold on TCP performance. As confirmed by comparison with simulations, the model provides, in significant less time than simulations, accurate estimates of typical performance indicators such as the average completion time and average drop rate of short-lived TCP connections.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
