tcp congestion control

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Fixing the unfairness of TCP congestion control

Fixing the unfairness of TCP congestion controlWowThis puts a whole new perspective on the debate about internet bandwidth throttling by ISPs... I doubt the average user who wants unrestricted internet access is aware of the impact of P2P using multiple streamsRE: Fixing the unfairness of TCP congestion controlWhy wouldn't using...

Tags: Peer to peer (P2P), TCP/IP, Network technology, NETWORKING, Overall IT, ALTQ, P2P, QoS, TCP Congestion Control, unfairness, IP, TCP, internal IP, bandwidth hog, router

Discussion threads 2008-03-24

Mathematical Analysis of Westwood+ TCP Congestion Control

TCP congestion control is based on an Additive-Increase/Multiplicative-Decrease AIMD probing paradigm aimed at adapting the sending rate of TCP data sources to match the Internet time-varying available bandwidth. Westwood+ TCP has been recently proposed to improve the tracking of available bandwidth of classic TCP. It is based on an end-to-end...

Tags: Bandwidth, TCP, Analysis, TCP Congestion Control, Tcp/Ip, Networking

White papers 2006-04-05

Additional Resources

Robust Control Tools for Traffic Monitoring in TCP/AQM Networks

Several studies have considered control theory tools for traffic control in communication networks, as for example the congestion control issue in IP Internet Protocol routers. This paper proposes to design a linear observer for time-delay systems to address the traffic monitoring issue in TCP/AQM (Transmission Control Protocol/Active Queue Management) networks....

Tags: Theory, Monitoring, IP, Tool, University Of Toulouse-Le Mirail, Productivity, Tcp/Ip, Networking, Network Technology

White papers 2009-02-02

BigSpeed Secure Socket Library 3.0 (Windows)

BigSpeed Secure Socket Library is an ActiveX control that dramatically simplifies and accelerates the development of proprietary communication solutions over the Internet. It implements a flexible message-oriented protocol on top of a single TCP connection with on-the-fly data scrambling. The transparent 128-bit AES encryption uses shared crypto keys, without need...

Tags: Microsoft Visual Basic, Microsoft Windows, BigSpeed Computing, BigSpeed Secure Socket Library, Microsoft Development Tools, Programming Languages, Ssl/Tls, Tcp/Ip, Network Security, Development Tools, Software Development, Software/Web Development, Security, Networking

Software downloads 2008-10-30

Troubleshooting and Securing TCP/IP Networks with Wireshark

View Available Dates and LocationsIn this lab-based course, you will gain the skills required to effectively troubleshoot and secure a TCP/IP network by analyzing network traffic with Wireshark as you prepare for the Wireshark Certification Exam. Spend half of your class time learning techniques to analyze traffic on poorly performing...

Tags: Network, Tcp/Ip, Networking, Network Technology

Training 2008-09-01

Block-Switched Networks: A New Paradigm for Wireless Transport

TCP has well-known problems over multi-hop wireless networks as it conflates congestion and loss, performs poorly over time-varying and lossy links, and is fragile in the presence of route changes and disconnections. In this paper contribution is a clean-slate design and implementation of a wireless transport protocol, Hop, that uses...

Tags: University Of Massachusetts, Wi-Fi, Tcp/Ip, Wireless, Networking

White papers 2008-05-28

Skype Video Responsiveness to Bandwidth Variations

The TCP/IP stack has been extremely successful for reliable delivery of best-effort, time insensitive elastic type data traffic. Nowadays, the Internet is rapidly evolving to become an equally efficient platform for multimedia content delivery. Since the UDP does not implement congestion control, these applications must implement those functionalities at the...

Tags: Multimedia, Skype Technologies S.A., Association For Computing Machinery, Video, Internet, Tcp/Ip, Corporate Communications, Networking, Marketing

White papers 2008-04-14

News to know: Ubuntu; Microsoft's Albany; Google; Safari flap

Notable headlines: Adrian Kingsley-Hughes: First look: Hardy Heron Beta. Gallery: Installation. Screen shots: OS tour Mary Jo Foley: ‘Albany’: New Microsoft ‘home office’ in the works? Michael Krigsman: Is IT becoming extinct? Garett Rogers: New Google Mobile feature...

Tags: Ubuntu, Google Inc., Apple Safari, Apple Inc., Microsoft Corp., Mozilla Corp., CEO, MSM, Internet, Microsoft Windows, Spyware, Adware & Malware, Cyberthreats, Wireless LANs, Operating Systems, Wireless, Open Source, Software, Security, Larry Dignan

Blog posts 2008-03-24

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

Comcast traffic management issue before FCC

Today is the deadline for the FCC call for comments on the Comcast traffic management case brought about by a formal complaint from the Free Press and Public Knowledge.  As a former network engineer who designed networks and servers and as someone who has written extensively on these matters, I...

Tags: FCC, Bandwidth, Packet, Electronic Frontier Foundation, BitTorrent, Network, Comcast Corp., P2P, Problem, Verizon Communications Inc., Broadband, DOCSIS, Network Management, BitTorrent Seeder, Networking, Cable, Broadband Internet, Telecommunications, Personal Technology, George Ou

Blog posts 2008-02-13

Design and Implementation of Split TCP in the Linux Kernel

With all its history of reliable performance, the TCP protocol is known to break down in a situation with high loss and high RTT. A known solution is "Split TCP", where one or a few proxies helper boxes are used to break the end-to-end TCP connection into a few almost...

Tags: Linux, Linux Kernel, TCP, New Jersey Institute Of Technology, Kernel Implementation, Tcp/Ip, Networking

White papers 2008-01-01

Dynamic Load Balancing Without Packet Reordering

Dynamic load balancing is a popular recent technique that protects ISP networks from sudden congestion caused by load spikes or link failures. Dynamic load balancing protocols, however, require schemes for splitting traffic across multiple paths at a fine granularity. Current splitting schemes present a tussle between slicing granularity and packet...

Tags: Packet, Granularity, Load Balancing, Network Technology, Tcp/Ip, Networking

White papers 2008-01-01

Adaptive Video Streaming: Pre-Encoded MPEG-4 With Bandwidth Scaling

The increasing popularity of streaming video is a cause for concern for the stability of the Internet because most streaming video content is currently delivered via UDP, without any end-to-end congestion control. Since the Internet relies on end systems implementing transmit rate regulation, there has recently been significant interest in...

Tags: Congestion Control, Bandwidth, Streaming Video, Video, Web Site Development, Digital Video, Web Technology, Corporate Communications, Internet, Personal Technology, Marketing

White papers 2008-01-01

EFF wants to saddle you with metered Internet service

Updated 12/8/2007 - The EFF Electronic Frontier Foundation last week publicly joined Free Press and Public Knowledge in recommending a metered Internet service as the alternative to Comcast's BitTorrent throttling.  The extremist "Net Neutrality" crowd that wants to regulate the Internet with bans on per-user charges/contracts for Enhanced QoS are...

Tags: Electronic Frontier Foundation, BitTorrent, Network, Comcast Corp., Problem, Internet Service Provider, DOCSIS, Internet Service, ACL, Internet Service Providers (ISPs), Networking, Cable, Broadband Internet, Internet, Telecommunications, Personal Technology, George Ou

Blog posts 2007-12-03

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

A Window-Based Flow Control Mechanism Based on TCP Vegas With Explicit Congestion Notification

A window-based flow control mechanism is a sort of feedback-based congestion control mechanisms, and has been widely used in TCP/IP networks. Recently proposed TCP Vegas is another version of the TCP mechanism and has potential to achieve much better performance than current TCP Tahoe and Reno. This paper focuses on...

Tags: Mechanism, Window, TCP, Osaka University, Tcp/Ip, Construction, Networking

White papers 2007-11-16

A Control Theoretical Approach to a Window-Based Flow Control Mechanism With Explicit Congestion Notification

A window-based flow control mechanism is a sort of feedback-based congestion control mechanisms, and has been widely used in current TCP/IP networks. Recently proposed TCP Vegas is another version of the TCP mechanism and has potential to achieve much better performance than current TCP Tahoe and Reno. However, it has...

Tags: Mechanism, Window, 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

Implementation and Evaluation of Late Data Choice for TCP in Linux

Real-time delivery of time-dependent data over the Internet is challenging. UDP has often been used to transport data in a timely manner, but its lack of congestion control is often criticized. This criticism is a reason that the vast majority of applications today use TCP. The downside of this is...

Tags: Linux, Congestion Control, TCP, UDP, University Of Oslo, Tcp/Ip, Networking

White papers 2007-09-11