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- The Effect of Reverse Traffic on the Performance of New TCP Congestion Control Algorithms
- Several new TCP congestion control algorithms have been proposed to speed up the TCP over very fast networks. All these algorithms propose their own modifications of the increasing/decreasing phases of classic Reno/NewReno TCP. On the other hand, all of them preserve the self-clocking mechanism, which is a fundamental part of...
- Tags: Algorithm, Performance, Congestion, TCP, Tcp/Ip, Networking
- White papers 2007-01-01
- Congestion Propagation Among Routers in the Internet
- In recent years, various non-linear phenomena of the Internet have been discovered. For instance, it is reported that congestion of a router propagates to neighboring routers like a wave. Several researches on congestion propagation among routers have been performed. However, in these researches, cause of congestion propagation and condition that...
- Tags: Internet, Router, Congestion Propagation, Routers & Switches, Network Technology, Networking
- White papers 2007-11-16
- Edinburgh Leads the Way With Its RFID Bus Priority System to Help Reduce Congestion and Speed Up Traffic
- Edinburgh is in the forefront of technology that automatically gives buses the green light, reduces traffic congestion and encourages use of public transport. TIRIS Radio Frequency IDentification RFID technology from Texas Instruments is being used in Edinburgh in the latest traffic-light priority system aimed at easing traffic congestion and reduction...
- Tags: Edinburgh, Transport, Congestion, RFID, Wireless, Security, Biometrics
- Case studies
- Congestion Control in Linux TCP
- The TCP protocol is used by the majority of the network applications on the Internet. TCP performance is strongly influenced by its congestion control algorithms that limit the amount of transmitted traffic based on the estimated network capacity and utilization. Because the freely available Linux operating system has gained popularity...
- Tags: Network, Congestion, TCP, TCP Performance, TCP Protocol, Tcp/Ip, Linux, Networking, UNIX, Operating Systems, Open Source, Software
- White papers
- Combining Multipath Routing and Congestion Control for Robustness
- Flexible routing schemes mitigate some of the problems associated with uncertain traffic patterns and workloads by making the exact location of capacity less important: if there is available capacity the routing scheme will find it. This paper proposes a combined multipath routing and congestion control architecture that can provide performance...
- Tags: Traffic, Congestion, Multipath, Engineering, Performance Management, Human Resources, Workforce Management
- White papers 2006-02-24
- COCOON: An Alternative Approach to End-Point Congestion Management
- This paper proposes an alternate endpoint congestion management scheme, called COordinated COngestion cONtrol COCOON. The basic idea is to identify and group connections that may traverse the same backbone link, to enable them to share congestion information, and to coordinate among them all the congestion avoidance/control activities. The size of...
- Tags: Congestion, Connection, COCOON, Congestion Management, Idea, Tcp/Ip, Networking, Construction, Telecommunications
- White papers
- An Experimental Investigation of the Congestion Control Used by Skype VoIP
- The explosive growth of VoIP traffic poses a potential challenge to the stability of the Internet that, up to now, has been guaranteed by the TCP congestion control. This paper investigates how Skype behaves in the presence of time-varying available bandwidth in order to discover if some sort of congestion...
- Tags: Bandwidth, VoIP, Congestion, Skype Technologies S.A., Tcp/Ip, Networking
- White papers 2007-03-06
- Congestion Control Advancements in Linux
- This paper describes the recent advancements in network congestion control in the Linux kernel. Specifically the paper focuses on the TCP congestion framework, and the implementation of the DCCP protocol stack. Linux has had multiple TCP congestion methods added to it and the subsequent growth of the codebase has made...
- Tags: Congestion, TCP, Tcp/Ip, Linux, Networking, Operating Systems, Open Source, Software
- White papers 2005-11-22
- End-to-End Congestion Control for System Area Networks
- System Area Networks SANs using link-level flow control experience congestion spreading, where one bottleneck link causes traffic to block throughout the network. In this paper, an end-to-end congestion control scheme is proposed that avoids congestion spreading, delivers high throughput, and prevents flow starvation. It couples a simple switch-based ECN packet...
- Tags: Congestion Control, Network, Congestion, Networking
- White papers 2002-05-13
- AMPS - ANStool: Interoperability of Automated Tools for the Provisioning of QoS Services
- Modern IP-based packet networks carry a number of varying services, and one of their crucial aspects is the implementation of Quality of Service QoS techniques. Packet networks that support QoS can accommodate simultaneously different traffic types, such as data, voice, and video, by handling time-critical traffic appropriately at congestion points....
- Tags: Interoperability, QoS, Provisioning, Tool, University Of Patras, Packet Network, Networking
- White papers 2007-01-31
- Quality of Service on Cisco Catalyst 4500 Series Supervisor Engines
- Quality of Service QoS provides the capability to differentiate among different classes of traffic and to prioritize the traffic in times of network congestion, according to its relative importance. The primary goals of QoS are to provide guaranteed minimum bandwidth for identified traffic, control jitter and latency (required by some...
- Tags: Cisco Catalyst, QoS, Supervisor, Cisco Systems Inc.
- White papers 2006-01-01
- MATE: MPLS Adaptive Traffic Engineering
- Destination-based forwarding in traditional IP routers has not been able to take full advantage of multiple paths that frequently exist in Internet Service Provider Networks. As a result, the networks may not operate efficiently, especially when the traffic patterns are dynamic. This paper describes a multipath adaptive traffic engineering mechanism,...
- Tags: MPLS, Network, University Of Michigan, Networking, Network Technology
- White papers 2008-01-01
- A Rate-Based Congestion Control Scheme for Reliable Multicast Achieving TCP Fairness
- TCP-friendly congestion control is a major requirement for reliable multicast to be deployed in the current Internet. This is because TCP responses to congestion control when it occurs, but multicast does not. Furthermore, TCP is the predominant protocol used in the current Internet. So it is important to make a...
- Tags: Congestion, TCP, Fairness, Tcp/Ip, Networking
- White papers 2006-05-02
- De-Randomizing Congestion Losses to Improve TCP Performance Over Wired-Wireless Network
- Currently, a TCP sender considers all losses as congestion signals and reacts to them by throttling its sending rate. With Internet becoming more heterogeneous with more and more wireless error-prone links, a TCP connection may unduly throttle its sending rate and experience poor performance over paths experiencing random losses unrelated...
- Tags: Idea, Congestion, TCP, Congestion Loss, Tcp/Ip, Networking
- White papers 2007-01-01
- "De-Randomizing" Congestion Losses to Improve TCP Performance Over Wired-Wireless Networks
- Currently, a TCP sender considers all losses as congestion signals and reacts to them by throttling its sending rate. With Internet becoming more heterogeneous with more and more wireless error-prone links, a TCP connection may unduly throttle its sending rate and experience poor performance over paths experiencing random losses unrelated...
- Tags: Congestion, TCP, Congestion Loss, Idea, Tcp/Ip, Networking
- White papers 2007-01-01
- TCP-Friendly Rate Control With Token Bucket for VoIP Congestion Control
- TCP Friendly Rate Control TFRC is a congestion control algorithm that provides a smooth transmission rate for real-time network applications. TFRC refrains from halving the sending rate on every packet drop; instead it is adjusted as a function of the loss rate during a single round trip time. TFRC has...
- Tags: VoIP, Congestion, TCP, TCP Friendly Rate Control, Tcp/Ip, Networking
- White papers 2005-10-17
- Congestion Control Algorithms of TCP in Emerging Networks
- This paper examines some of the challenges faced by the congestion control algorithms of TCP in emerging networks. Three main issues are focused. First, it proposes TCP with delayed congestion response (TCP-DCR), for improving performance in the presence of non-congestion events. Second, the paper proposes Layered TCP LTCP, which modifies...
- Tags: Algorithm, Network, Congestion, TCP, Tcp/Ip, Networking
- White papers 2006-08-01
- Explicit Congestion Notification (ECN) for TCP/IP
- When routers become congested to the point in which their incoming packet buffers fill and they begin dropping packets, the effect on the network is reduced bandwidth, an impact on loss or time-sensitive traffic flows, and possibly link idle time after the congestion occurs. Explicit Congestion Notification ECN for TCP/IP...
- Tags: Router, Congestion, TCP, Microsoft Corp., Tcp/Ip, Networking, Network Technology, Routers & Switches
- White papers 2006-10-02
- Motorola's Wireless Broadband Helps Glasgow's Buses Run On-Time
- To underpin the traffic analysis and control systems that will improve bus services, a communications network was required. This would send real-time intelligence on congestion levels to the control centre, and provide the facility to adjust traffic light phases to expedite the progress of buses through the city. The network...
- Tags: Network, Broadband, Motorola Inc., Wireless Broadband, Wireless, Wi-Fi, Networking
- Case studies 2008-02-13
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