Based on a large set of TCP sessions we first study the accuracy of two well-known analytical models [SQRT and PFTK] of the TCP average rate. This study shows that these models are far from being accurate on average. Actually, our simulations show that 70% of their predictions exceed the boundaries of TCP-Friendliness, thus questioning their use in the design of new TCP-Friendly transport protocols. Our study also shows that the inaccuracy of the PFTK model is largely due to its inability to make the distinction between the two packet loss detection methods used by TCP: triple duplicate acknowledgments or timeout expirations. We then use supervised learning techniques to infer models of the TCP rate. These models show important accuracy improvements when they take into account the two types of losses. This suggests that analytical model of TCP throughput should certainly benefit from the incorporation of the timeout loss rate.
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2014, Third International Conference on Future Generation Communication Technologies
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The Selection of equipment that is not good can affect the company's work operations, especially MUX [Multiplexer], OTDR [Optic Time-Domain Reflectometer], and spacing which functions to measure the fiber optic telecommunication system and use UTP [Unshielded Twisted Pair], cable to become FO [Fiber Optic] for faster connections and optimal data transaction processing for the company's business. Ethernet speed will decrease with the increasing number of nodes or increasing IP address-based equipment used, so Ethernet is developed towards 100Mbps Fast Ethernet as a Support for transmission performance. Therefore, the performance calculation shows tha the migration carried out by the company is very precise and it is proven from the calculation that for a data transaction of 250Mb it only takes ± 20 seconds, which is different from the old line of 2 Mbps which can only take 1024 seconds for data transactions of 250Mb.
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2006, Journal of Mathematical Sciences
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2007, Relation
Data compression is well known as a transformation of data tra c that is able to greatly increase the data rate in a network, and as the cost of processing power decreases compression is becoming more and more widely used for this purpose. In this paper, we look at the statistical properties of this transformation, studying changes in the probabilistic characteristics of packet sizes caused by compressing packets transmitted under three di erent network protocols [TCP, IP, and Ethernet] and using three di erent compression ...
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2004, Fifth IEE International Conference on 3G Mobile Communication Technologies [3G 2004] The Premier Technical Conference for 3G and Beyond
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1985, IEEE Journal on Selected Areas in Communications
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2014, IEEE Communications Letters
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2002
Abstract We present an analytical model for the calculation of network load and drop probabilities in a TCP/IP network with general topology. First we formulate our model as a nonlinear complementarity problem. Then we transform the model into two equivalent formulations: fixed point formulation and nonlinear programming formulation. These equivalent formulations provide efficient computational procedures for the solution of our model.
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Wlan networks have a great influence on human everyday life. You can see its usage in airport, wireless transmission like mobile, to prevent fire in jungle, communications, est. but what is the relation between math and network? Network is a simulation model of graph and the throughput of its many parameters is measured by analytical models .one of this math application in network fields is markov model. We evaluate extensively through analysis, simulation, and experimentation the interaction between the TCP flows. The main goal of this paper is calculating the throughput ratio between upstream and downstream TCP flows. At last, we demonstrate a mathematical model to analyze the behavior of up/down flows and we prove that it can be used in real models.
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2000
Many works have studied the negative impact of slow start on the performance of short transfers. Some works propose to accelerate the window increase during this phase in order to improve the performance especially on satellite links. Others propose to set the slow start threshold at the beginning of the connection to a more accurate value in order to avoid losses. But, these works didn't account for the impact of network buffers on the performance.
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2000, Computers & Electrical Engineering
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2008, Journal of Network and Computer Applications
Due to the shortage of public IPv4 addresses, the IETF has developed a new version of the Internet Protocol called IPv6. Many institutions all over the world had already started the migration to IPv6. Since this migration has to be done slowly, the first step is the coexistence of the two protocols [IPv4 and IPv6] for some years. One important issue for IPv6 to gain acceptance, is its performance in end-user applications. Hence, due to the availability of a variety of IPv6 implementations on different operating systems, it is important to evaluate the performance of the different IPv6 stacks, and compare it to the one shown by IPv4. In this paper, we present an upper bound model to compute TCP and UDP throughput for IPv4 and IPv6, in a full-duplex point-to-point connection. Our model can be used for any variant of Ethernet technology [10, 100, and 1000Mbps]. To validate this model, we did experiments and compared the maximum theoretical throughput with the experimental ones. Experiments were done with Windows XP SP2, Solaris 10, and Debian 3.1, which are very popular operating systems. The results show that 10Mbps Ethernet technology is already very mature, since it gave performance very close to the maximum theoretical throughput. Experiments with FastEthernet [100Mbps] show a TCP and UDP throughput close to the maximum theoretical throughput, especially for large payload. In the case of GigaEthernet [1000Mbps], experimental results are not far from the maximum throughput for large TCP and UDP payload. However, for small TCP and UDP payload, the differences between our model [the maximum throughput] and the experiments are important. These differences should significantly decrease with the release of faster technology [processors and RAM].
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2004, Lecture Notes in Computer Science
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di.unito.it
This report describes our work in progress on defining an approach to investigate IP networks loaded with traffic resulting from a set of ON-OFF finite TCP-Reno connections. The approach is based on separate model descriptions of the TCP connection latency to transfer a finite number of packets and the IP network links; the two models are iteratively solved using a fixed point method. The overall model parameters are the primitive network characteristics; the model solution yields an estimation of the packet loss probability and ...
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2013, International Journal of Information and Decision Sciences
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2000, ACM SIGCOMM Computer …
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2010, 2010 5th Advanced Satellite Multimedia Systems Conference and the 11th Signal Processing for Space Communications Workshop
Computes the expectation of the number of transmissions and receptions considering a Hop-byHop transport model with limited number of retransmissions per packet. It provides the theoretical results shown in Palma et. al.[2015] and also estimated values based on Monte Carlo simulations
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2018
Application of the term video streaming in contemporary usage denotes compression techniques and data buffering, which can transmit video in real time over the network. There is currently a rapid growth and development of technologies using wireless broadband technology as a transport, which is a serious alternative to cellular communication systems. Adverse effect of the aggressive environment used in wireless networks transmission results in data packets undergoing serious distortions and often getting lost in transit. All existing research in this area investigate the known types of errors separately. At present there are no standard approaches to determining the effect of errors on transmission quality of services. Besides, the spate in popularity of multimedia applications has led to the need for optimization of bandwidth allocation and usage in telecommunication networks. Modern telecommunication networks should by their definition be able to maintain the quality of different ...
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2003, ACM SIGMETRICS Performance Evaluation Review
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2011, Proceedings of the 5th International ICST Conference on Performance Evaluation Methodologies and Tools
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1997
Abstract: We examine the problem of evaluating the performance of TCP connections over wide area networks. Our approach combines experimental and analytic methods, and proceeds in three steps. First, we have used measurements taken over Renater to provide a basis for the chosen analytic model.