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- 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
Additional Resources
- Another unannounced piece of Microsoft's Windows Mobile puzzle: eLive
- Microsoft seems to be continuing to keep most of its Windows Mobile cards close to the vest, even though it is CTIA Wireless week. At the show on April 1, company officials are talking up some of the new features slated for the updates of Windows Live...
- Tags: Microsoft Windows Mobile, Mobile, Microsoft Corp., eLive, Microsoft Windows, Operating Systems, Handhelds, Advertising & Promotion, Software, Hardware, Marketing, Mary Jo Foley
- Blog posts 2008-04-01
- An Extension of the Square Root Law of TCP
- Using probabilistic scaling methods, the square root law of TCP to schemes is extended which may not be of the AIMD type. The results offer insight in the relationship between throughput and loss rate, and the time scale on which losses take place. Similar results are shown to hold in...
- Tags: Georgia Institute Of Technology, Loss, TCP, Tcp/Ip, Networking
- White papers 2007-09-05
- On the Behavior of Optimal Scheduling Algorithms Under TCP Sources
- This paper focuses on the dynamical interaction between regulated Additive Increase Multiplicative Decrease AIMD traffic sources and the max-scalar scheduling policy, which has been proved to be optimal in terms of throughput in case of stationary unregulated traffic sources. It describes the average dynamics of both sources and queues dynamics...
- Tags: Algorithm, TCP, Dynamics, Source, Tcp/Ip, Engineering, Networking
- White papers 2007-03-19
- Enhancing Video Streaming Delivery Over Wired/Wireless Networks
- Transmission Control Protocol TCP is basically designed to provide a reliable service for wired Internet. The Additive Increase Multiplicative Decrease AIMD algorithm, incorporated into standard TCP versions, achieves stability and converges to fairness when the demand of competing flows exceeds the channel bandwidth. However, most existing TCP mechanisms do not...
- Tags: Streaming Video, TCP, Tcp/Ip, Networking
- White papers 2007-02-16
- Network Calculus Based Simulation for TCP Congestion Control: Theorems, Implementation, and Evaluation
- This paper examines the feasibility of incorporating network calculus based models in simulating TCP/IP networks. By exploiting network calculus properties, the authors characterize how TCP congestion control - additive increase and multiplicative decrease AIMD, together with the queue management strategy used in routers, regulates TCP flows. The paper first divides...
- Tags: Network, TCP, Tcp/Ip, 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: Window, Congestion, TCP, Construction, Tcp/Ip, Networking
- White papers 2007-01-01
- Analysis of Scalable TCP in the Presence of Markovian Losses
- In high speed networks, the standard TCP's AIMD algorithm was observed to be inefficient in utilizing the link capacity. As a result of which several proposals such as High-Speed TCP, FAST and Scalable TCP, were put forward. In contrast to the additive increase multiplicative decrease algorithm used in the standard...
- Tags: Algorithm, Window, Computer Science, TCP, Analysis, Tcp/Ip, Engineering, Construction, Networking
- White papers 2007-01-01
- TCP Symbiosis: Congestion Control Mechanisms of TCP Based on Lotka-Volterra Competition Model
- This paper proposes TCP Symbiosis, which has a robust, self-adaptive and scalable congestion control mechanism for TCP. The method is quite different from existing approaches. The paper changes the window size of a TCP connection in response to information of the physical and available bandwidths of the end-to-end network path....
- Tags: Method, TCP, Bandwidth Information, Tcp/Ip, Networking
- White papers 2006-10-12
- On the Interaction Between TCP-Like Sources and Throughput-Efficient Scheduling Policies
- This paper focuses on the dynamic interaction in packet networks between regulated Additive-Increase Multiplicative-Decrease AIMD traffic sources and max-scalar scheduling policies (such as the popular Maximum Weight Matching - MWM) at switches. The latter were proved to be optimal in terms of throughput for stationary unregulated traffic sources. It describes...
- Tags: Interaction, TCP, Tcp/Ip, Networking
- White papers 2006-07-01
- TCP Internal Buffers Optimization for Fast Long-Distance Links
- In recent years, issues regarding the behavior of TCP in high-speed and long-distance networks have been extensively addressed in the networking research community, both because TCP is the most widespread transport protocol in the current Internet and because bandwidth-delay product continues to grow. The well known problem of TCP in...
- Tags: Optimization, TCP, Tcp/Ip, Networking
- White papers 2006-05-19
- 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, Congestion, TCP, Analysis, Westwood+ TCP, Tcp/Ip, Networking
- White papers 2006-04-05
- Performance Modeling of TCP/AQM With Generalized aimd Under Intermediate Buffer Sizes
- TCP is the dominant transport protocol to carry most of Internet data traffic, e.g., email, FTP, P2P. Each TCP source just iterates its own congestion control algorithm to respond to the congestion signal generated by AQM Active Queue Management schemes in the network. So, TCP/AQM is essentially a distributed, close-loop...
- Tags: Performance, Congestion, TCP, North Carolina State University, Tcp/Ip, Engineering, Networking
- White papers 2005-10-11
- H-TCP: A Framework for Congestion Control in High-Speed and Long-Distance Networks
- This paper presents a new AIMD congestion control algorithm, H-TCP that is suitable for deployment in high speed and long distance networks as well as conventional networks. H-TCP generalises the AIMD strategy to significantly improve the manner in which responsiveness and efficiency scale with path bandwidth-delay product and level of...
- Tags: Ireland, Network, Congestion, H-TCP, Networking
- White papers 2005-06-28
- Characterization and Evaluation of TCP and UDP-Based Transport on Real Networks
- Standard TCP Reno TCP does not perform well on fast long distance networks, due to its AIMD congestion control algorithm. This paper considers the effectiveness of various alternatives, in particular with respect to their applicability to a production environment. Then the paper characterizes and evaluates the achievable throughput, stability and...
- Tags: Network, RealNetworks Inc., Characterization, TCP, UDP, Tcp/Ip, Networking
- White papers 2005-01-01
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