TCP Libra: Exploring RTT-Fairness for TCP

Marfia, Gustavo; Palazzi, Claudio E.; Pau, Giovanni; Gerla, Mário; Sanadidi, M. Y.; Roccetti, Marco

doi:10.1007/978-3-540-72606-7_86

Cited by 42 publications

(37 citation statements)

References 8 publications

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“…In addition, Hybla introduces two more techniques that complement the congestion control: pacing the transmission of data packets [93] and estimating the initial slow-start threshold using the packet pair algorithm [85]. The pacing is essentially setting up a minimal delay between transmission of any two consecutive packets.…”

Section: Tcp Hyblamentioning

confidence: 99%

“…Marfia et al [85] proposed Libra as another variant of congestion control to resolve the scalability issues in standard TCP, while preserving and improving the RTT-fairness properties. Libra's design is based on NewReno (Section II-D) and modifies the Congestion Avoidance congestion window increase steps to follow a specially designed function of both the RTT and the bottleneck link capacity.…”

Section: J Tcp Libramentioning

confidence: 99%

See 1 more Smart Citation

Host-to-Host Congestion Control for TCP

Afanasyev

Tilley

Reiher

et al. 2010

IEEE Commun. Surv. Tutorials

234

146

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Abstract-The Transmission Control Protocol (TCP) carries most Internet traffic, so performance of the Internet depends to a great extent on how well TCP works. Performance characteristics of a particular version of TCP are defined by the congestion control algorithm it employs. This paper presents a survey of various congestion control proposals that preserve the original host-to-host idea of TCP-namely, that neither sender nor receiver relies on any explicit notification from the network. The proposed solutions focus on a variety of problems, starting with the basic problem of eliminating the phenomenon of congestion collapse, and also include the problems of effectively using the available network resources in different types of environments (wired, wireless, high-speed, long-delay, etc.). In a shared, highly distributed, and heterogeneous environment such as the Internet, effective network use depends not only on how well a single TCPbased application can utilize the network capacity, but also on how well it cooperates with other applications transmitting data through the same network. Our survey shows that over the last 20 years many host-to-host techniques have been developed that address several problems with different levels of reliability and precision. There have been enhancements allowing senders to detect fast packet losses and route changes. Other techniques have the ability to estimate the loss rate, the bottleneck buffer size, and level of congestion. The survey describes each congestion control alternative, its strengths and its weaknesses. Additionally, techniques that are in common use or available for testing are described.

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Section: Tcp Hyblamentioning

confidence: 99%

Section: J Tcp Libramentioning

confidence: 99%

Host-to-Host Congestion Control for TCP

Afanasyev

Tilley

Reiher

et al. 2010

IEEE Commun. Surv. Tutorials

234

146

View full text Add to dashboard Cite

show abstract

“…When two flows contend for bandwidth on a bottleneck link, they are assigned bandwidths inversely proportional to their RTTs [13]. As demonstrated in [10], the RTT time needs to account both for latency along the path but also for the possibly low capacity of some links that may incur large delays.…”

Section: Network Communication Modelingmentioning

confidence: 99%

Scalable Multi-purpose Network Representation for Large Scale Distributed System Simulation

Bobelin

Legrand

Márquez³

et al. 2012

2012 12th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (Ccgrid 2012)

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Abstract-Conducting experiments in large-scale distributed systems is usually time-consuming and labor-intensive. Uncontrolled external load variation prevents to reproduce experiments and such systems are often not available to the purpose of research experiments, e.g., production or yet to deploy systems. Hence, many researchers in the area of distributed computing rely on simulation to perform their studies. However, the simulation of large-scale computing systems raises several scalability issues, in terms of speed and memory. Indeed, such systems now comprise millions of hosts interconnected through a complex network and run billions of processes. Most simulators thus trade accuracy for speed and rely on very simple and easy to implement models. However, the assumptions underlying these models are often questionable, especially when it comes to network modeling.In this paper, we show that, despite a widespread belief in the community, achieving high scalability does not necessarily require to resort to overly simple models and ignore important phenomena. We show that relying on a modular and hierarchical platform representation, while taking advantage of regularity when possible, allows us to model systems such as data and computing centers, peer-to-peer networks, grids, or clouds in a scalable way. This approach has been integrated into the opensource SIMGRID simulation toolkit. We show that our solution allows us to model such systems much more accurately than other state-of-the-art simulators without trading for simulation speed. SIMGRID is even sometimes orders of magnitude faster.

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“…It is worth noting that CUBIC is the default TCP protocol of current Linux kernels. TCP Libra [15] is another solution to provide RTT fairness while maintaining a good friendliness with TCP New Reno. The research to make further improvements yielded to the development of H-TCP [16].…”

Section: Related Work On Tcp Versionsmentioning

confidence: 99%

A Research Framework for Analyzing High Speed Transport Protocols Based on Control-theory

Sonkoly

Simon

Trinh

et al. 2010

NPA

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In the recent years, several transport protocols have been proposed for very high bandwidth-delay product networks. However, little is known about the performance of these new mechanisms as well as the interaction with other elements of the network (such as the RED queue management). On the other hand, the control-theoretic approach has proved to be a very useful tool in order to get analytical insight into the performance of congestion control algorithms. In this paper, a control-theoretic research framework is designed and implemented for analyzing high speed transport protocol proposals in network environments with RED active queue management. As a case study, a comprehensive control-theoretic analysis of a promising proposal, namely the HighSpeed TCP is provided. The main contributions of this paper are the following. First, we provide a fluid-flow model for HighSpeed TCP/RED networks. Second, a comprehensive and systematic implementation methodology is described in detail, and a Simulink-based framework is designed for analyzing fluid-based models. Third, we derive a stability condition for HighSpeed TCP/RED networks. The flow-level results are validated by packet-level simulations conducted in Ns-2. Finally, an extension of the framework is presented that makes it capable of describing the interaction of different transport protocols.

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TCP Libra: Exploring RTT-Fairness for TCP

Cited by 42 publications

References 8 publications

Host-to-Host Congestion Control for TCP

Host-to-Host Congestion Control for TCP

Scalable Multi-purpose Network Representation for Large Scale Distributed System Simulation

A Research Framework for Analyzing High Speed Transport Protocols Based on Control-theory

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