A detailed and accurate closed queueing network model of many interacting TCP flows

Abstract

Abstract-This

Understanding the performance of many TCP flows

“…[2] develops a stochastic model for the performance of a single TCP session in the presence of random packet loss. [20] presents a closed queueing network model for the estimation of the performance of TCP/Tahoe connections, such as packet loss rate, ÛÒ , and ××Ø Ö × . We believe our simulation studies are complementary to the analytical modeling, and help further explore TCP dynamics under controlled environment.…”

Sender- Side TCP Modifications: An Analytical Study

“…Following the approach first adopted in [7,18,19,20], in this paper we use an open multiclass queuing network (OMQN)-based description of the TCP protocol to investigate the benefits and drawbacks of possible modifications to TCP. An OMQN is a queueing network in which all queues are M/G/∞.…”

“…The OMQN modeling technique has proven to be extremely accurate [7,20], and this is the main reason that led us to choose this analytic approach for our study, instead of a more common simulation approach. Its powerful modeling paradigm and computational efficiency, associated with its proven accuracy, enable to gain the best possible insight in the protocol dynamics and in the consequences of protocol modifications with acceptable costs, while simulation studies are always limited in their scope by computational costs and difficulties in the interpretations of the results.…”

“…Any further detail about the OMQN modeling technique is superfluous in this context and we refer the interested reader to the available literature [7,18,19,20,21].…”

“…The OMQN model can take this modification into account exactly in the same way it accounts for the window thresholds distribution (see [7]), assigning to W fs the value of the average window size computed in the previous iteration, i.e., by evaluating an ensemble average taken over the active protocol states and iterating the solution until convergence.…”