congestion control algorithm

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TCP Congestion Control Over 3G Communication Systems: An Experimental Evaluation of New Reno, BIC and Westwood+

One of TCP's key tasks is to react and avoid network congestion episodes which nor-mally arise in packet switched networks. A wide literature is available concerning the behaviour of congestion control algorithms in many different scenarios and several congestion control algorithms have been proposed in order to improve performances in...

Tags: Congestion Control, 3G, TCP, Congestion Control Algorithm, Tcp/Ip, Networking

White papers 2007-04-17

Evaluating the Performance of TCP Stacks for High-Speed Networks

The TCP congestion control algorithm has been remarkably successful in making the current internet function efficiently. However, it has become clear that it can perform very poorly in networks with high Bandwidth-Delay Product BDP paths. In response to this poor performance, numerous proposals have been made for changes to the...

Tags: Congestion Control, Performance, TCP, TCP Congestion Control Algorithm, Congestion Control Algorithm, Tcp/Ip, Networking

White papers 2005-06-27

Additional Resources

2010 Lincoln MKZ

Photo gallery:2010 Lincoln MKZThe same sort of modern stateliness we saw on the Lincoln MKS last year finds its way into the 2010 MKZ, along with an impressive technology array. Lincoln's new winged-grille design covers the front of this smallest Lincoln, giving it stronger presence than its platform mates, the...

Tags: Lincoln, MKZ, car

Product reviews 2009-10-07

Buses as mobile sensing platforms?

According to European researchers, modern buses could be used as mobile sensing platforms, sending out live information to be used to control traffic and detect road hazards. The 3.83 million euro EU-funded MORYNE project was completed in March 2008 with a test in Berlin, Germany. During this test, the researchers...

Tags: Mobile, Sensor, Advertising & Promotion, Marketing, Roland Piquepaille

Blog posts 2008-05-26

Fixing the unfairness of TCP congestion control

Bob Briscoe Chief researcher at the BT Network Research Centre is on a mission to tackle one of the biggest problems facing the Internet.  He wants the world to know that TCP Transmission Control Protocol congestion control is fundamentally broken and he has a proposal for the IETF to fix...

Tags: Algorithm, Application, Bandwidth, Network, P2P, TCP, Bob Briscoe, Van Jacobson, Jacobson, AIMD, ECN, Tcp/Ip, Networking, Peer To Peer (P2P), Internet, George Ou

Blog posts 2008-03-24

Online Client-Server Load Balancing Without Global Information

A distributed online algorithm is considered for maximizing throughput in a network of clients and servers, modeled as a bipartite graph. Unlike most prior work on online load balancing, it do not assume centralized control and seek algorithms and lower bounds for decentralized algorithms in which each participant has only...

Tags: Algorithm, Client-server, Johns Hopkins University, Engineering

White papers 2008-01-01

Parameter Tuning of Rate-Based Congestion Control Algorithms and Its Application to TCP Over ABR

In this paper, the rate-based congestion control algorithm that has been standardized in the ATM Forum is evaluated. Its behavior is analyzed by utilizing a first-order fluid approximation to provide control parameter tuning. This paper obtains the maximum queue length at the switch and conditions for avoiding under-utilization. The results...

Tags: Algorithm, Congestion Control, TCP, Osaka University, Tcp/Ip, Networking

White papers 2007-11-16

Effects of Handover on TCP Congestion Control Algorithms Over Mobile WiMAX

This paper analyzes the performance characteristics of TCP congestion control algorithms such as TCP Westwood+, Veno and New Reno based on mobile WiMAX. Especially, this paper describes the effect of handover on the algorithms over mobile WiMAX networks. The ns-2 simulation results show that TCP Westwood+ and Veno are substantially...

Tags: Algorithm, Performance, Mobile, TCP, Tcp/Ip, WiMAX, Engineering, Networking, Wi-Fi, Wireless And Mobility

White papers 2007-10-10

An Optimal Weighted-Average Congestion Based Pricing Scheme for Enhanced QoS

Pricing is an effective tool to control congestion and achieve Quality of Service QoS provisioning for multiple differentiated levels of service. This paper considers the problem of pricing for congestion control in the case of a network of nodes under a single service class and multiple queues, and presents a...

Tags: QoS, Pricing Strategy, Pricing, Marketing Research, Marketing

White papers 2007-09-28

TCP MaxNet - Implementation and Experiments on the WAN in Lab

This paper describes implementation and performance of TCP MaxNet, a new protocol which uses a multi-bit explicit signaling approach to congestion control. The MaxNet sender algorithm operates by adjusting its congestion window in response to explicit feedback from the most congested link encountered in the network. This scheme has numerous...

Tags: California Institute Of Technology, TCP, MaxNet Sender Algorithm, Tcp/Ip, WANs, Networking, Performance Management, Network Technology, Human Resources, Workforce Management

White papers 2007-09-07

Estimation of RTT and Bandwidth for Congestion Control Applications in Communication Networks

Heterogeneous communication networks with their variety of application demands, uncertain time-varying traffic load, and mixture of wired and wireless links pose several challenging problem in modeling and control. This paper focuses on the Round-Trip Time RTT, which is a particularly important variable for efficient end-to-end congestion control, and on bandwidth...

Tags: Estimation, Algorithm, Congestion Control, Bandwidth, Network, RTT, Engineering, Networking

White papers 2007-08-04

Improving Start-Up and Steady-State Behavior of TCP in High Bandwidth-Delay Product Networks

It has been long known that the standard Transmission Control Protocol TCP yields limited performance in high bandwidth-delay product BDP networks due to its conservative Slow Start and Congestion Avoidance algorithms. This paper focuses on TCP modifications to improve both TCP's start-up and steady-state behavior. First, the paper proposes Jump...

Tags: Network, TCP, Tcp/Ip, Networking

White papers 2007-08-01

Application-Level QoS: Improving Video Conferencing Quality Through Sending the Best Packet Next

In a traditional network stack, data from an application is all transmitted in the order that it is received. This paper proposes an algorithm where information about the priority of packets and expiry times is used by the transport layer to reorder or discard packets to optimise the use of...

Tags: Video Conferencing, Engineering, Tcp/Ip, Networking

White papers 2007-06-28

Sender Side Intelligence for TCP Throughput Enhancement in Wired-Cum-Wireless Network

Performance of the TCP Congestion Control Algorithm has been the focus of research over the last decade. This paper proposes modifications to TCP Congestion Control to improve its performance in wired-cum-wireless networks. The key idea to determine the Optimal Congestion Window for a TCP Sender, in a particular network scenario...

Tags: Network, TCP, Tcp/Ip, Networking

White papers 2007-06-13

Two Different Models of FAST TCP and Their Stable and Efficient Modification

This paper introduces two different models of FAST TCP. One is from the original FAST TCP model, and the other is from the ns-2 implementation of FAST TCP. Interestingly, these two models show significantly different dynamic performance and stability characteristics. That is, while the latter model is always globally exponentially...

Tags: TCP, Model, Engineering, Tcp/Ip, Networking

White papers 2007-04-29

Modeling Scalable TCP Friendliness to NewReno TCP

Scalable TCP is a simple change to the traditional TCP congestion control algorithm which dramatically improves TCP performance in high speed wide area networks. The focus of this contribution is to model the performance of Scalable TCP algorithm sharing bottleneck link with a NewReno TCP. The analysis is performed during...

Tags: Congestion, TCP, Modeling, Scalable TCP, Tcp/Ip, Networking

White papers 2007-03-01

TCP-Fusion: A Hybrid Congestion Control Algorithm for High-Speed Networks

This paper presents a new congestion control algorithm of TCP, called TCP-Fusion, and provides its extensive evaluation results through simulations and implementations. Recently, towards high-speed networks with large bandwidth delay product, a number of different approaches have been proposed to improve TCP performance. However, their potential unfriendliness to TCP-Reno encumbers...

Tags: Algorithm, Congestion Control, TCP, Tcp/Ip, Networking

White papers 2007-01-22

TCP-Like Congestion Control for Layered Multicast Data Transfer

This paper presents a novel congestion control algorithm suitable for use with cumulative, layered data streams in the MBone. The algorithm behaves similarly to TCP congestion control algorithms, and shares bandwidth fairly with other instances of the protocol and with TCP flows. It is entirely receiver driven and requires no...

Tags: Algorithm, Congestion Control, Layered Technologies Inc., TCP, University College London, Tcp/Ip, Engineering, Networking

White papers 2007-01-01

A Burstiness Control for High Speed Long Distance TCP

Gigabit networks are rapidly being deployed. This has stimulated intensive research on improving TCP congestion control algorithm in order to sustain large congestion window and high throughput. Most of these works however focus almost exclusively on window control algorithm that controls the network behavior at the round-trip time scale. This...

Tags: Algorithm, Congestion Control, California Institute Of Technology, TCP, Gigabit Network, Tcp/Ip, Engineering, Networking

White papers 2007-01-01

SCTP and TCP Variants: Congestion Control Under Multiple Losses

Inefficiency in the current specification of SCTP's congestion control is characterized, which degrades performance when there are multiple packet losses in a single window. An SCTP variant, called New-Reno SCTP is presented, which introduces three modifications. First, a Fast Recovery mechanism, similar to that of New-Reno TCP, is included to...

Tags: Congestion Control, Window, TCP, University Of Delaware, Construction, Tcp/Ip, Networking

White papers 2007-01-01