Scalable Performance Signalling and Congestion Avoidance

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Product Description

This book focuses on Internet congestion control with special emphasis given to signaling and network architecture. The author introduces a new protocol called Performance Transparency Protocol (PTP) and a congestion control mechanism called Congestion Avoidance with Distributed Proportional Control (CADPC), as well as provides:
*Complete specification of PTP;
*New simulation results that show how CADPC/PTP outperforms several current alternatives;
*A new method of using the well-known Chiu/Jain vector diagrams for analysis and design;
*A short and easily comprehensible introduction to Congestion Control and Quality of Service;
*An overview of explicit signaling mechanisms between end points and the network.

Scalable Performance Signalling and Congestion Avoidance provides a wealth of information on Internet and network congestion avoidance for network engineers and researchers.

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Scalable Performance Signalling and Congestion Avoidance Review

This review appeared in the IEEE Network Magazine's Nov. 2003 issue:Scalable Performance Signalling and Congestion Avoidance addresses the long standing issue of determining the most appropriate control methodology for networks that subscribe to the philosophy of a stateless core and the end-to-end principle. That is, it is all about ways the Internet's congestion control mechanisms should be tailored. The book calls for firm adherence to end-to-end adaptation, but in a more informed fashion via the use of an out-of-band signaling protocol. With such a scheme in place, the congestion control in effect becomes congestion avoidance. The book is based on Michael Welzl's thesis and attempts to make a case that the proposed out-of-band signaling both makes sense in terms of performance benefits, and is not in direct conflict with the aforementioned principles. The scheme exploits the availability of information available at the routers. In particular, information about interface speeds, congestion levels (queue lengths, link utilizations), and so on that would have been provided via SNMP are now conveyed via a specialized Performance Transparency Protocol (PTP). Despite similarities with the scope of SNMP, PTP is seeking to determine the performance of entire paths that are of direct benefit to the source-destination pair participating in communication. The thesis is composed of three parts. The first provides a very thorough review of current literature, as recent as 2003, describing TCP and congestion control alternatives and/or improvements to it. The case is made for signaling in a number of ways, including (rarely found in similar works) a game-theoretic argument behind the incentive for deployment. The second part is the presentation of PTP in detail. It is worthwhile to note that the thesis not only deals with the problem in an abstract way, but also provides a publicly available implementation of PTP inside the Linux kernel. The last part uses a particular example to illustrate PTP's usefulness. The example is in tune with the position that congestion avoidance is preferable to congestion control; specifically, it is an implementation of congestion avoidance with distributed proportional control (CADPC). In an extensive simulation, CADPC is compared to TCP in a variety of parameter settings. The book is written for an audience of researchers and is a reminder that information normally used by network management could be used instead (or in addition) for tackling the more fine-grained problem of congestion management for individual flows. Help other customers find the most helpful reviews� Was this review helpful to you? Yes No Report abuse | PermalinkComment�Comment

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