By Michael Welzl
ISBN-10: 047002528X
ISBN-13: 9780470025284
Which will preserve stable community functionality, mechanisms needs to be supplied to avoid the community from being congested for any major time period. Michael Welzl describes the heritage and ideas of net congestion keep watch over, in an obtainable and simply understandable layout. during the booklet, not only the how, however the why of complicated applied sciences together with the Transmission keep watch over Protocol (TCP) and energetic Queue administration are defined. The textual content additionally supplies an summary of the cutting-edge in congestion regulate study and an perception into the future.Network Congestion regulate: * provides complete, easy-to-read documentation at the complex subject of congestion keep watch over with no heavy maths. * goals to offer an intensive figuring out of the evolution of web congestion regulate: how TCP works, why it really works how it does, and why a few congestion regulate options failed for the net. * Explains the Chiu/Jain vector diagrams and introduces a brand new approach to utilizing those diagrams for research, instructing & layout. * Elaborates on how the idea of congestion regulate affects at the practicalities of carrier supply. * comprises an appendix with examples/problems to aid studying. * presents an accompanying web site with Java instruments for educating congestion keep an eye on, in addition to examples, hyperlinks to code and projects/bibliography. This precious textual content will offer lecturers and researchers in computing device technological know-how, electric engineering and communications networking, in addition to scholars onadvanced networking and net classes, with an intensive realizing of the present kingdom and destiny evolution of web congestion regulate. community directors and net carrier and functions companies also will locate community Congestion regulate a finished, obtainable self-teach device.
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Additional resources for Network Congestion Control: Managing Internet Traffic
Example text
7. RATE-BASED VERSUS WINDOW-BASED CONTROL 21 model’, where packets have a theoretical size of one bit and the rate of a data stream is therefore arbitrarily scalable; in practice, a packet of, say, 1000 bytes is either received as a whole or it is unusable. Often, network researchers rely on simulations for a deeper study of such scenarios. This being said, some authors have taken on the challenge of mathematically analysing stability of network congestion control in both the synchronous and the asynchronous case – two notable works in this area are (Johari and Tan 2001) and (Massoulie 2002); (Luenberger 1979) is a recommendable general introduction to dynamic systems and the notion of stability.
Many variations have been proposed over the years; however, to this day, the source rate control rule that is implemented in the Internet basically is an AIMD variant, and its design can be traced back to the reasoning in this section. 4, this mechanism converges to unfairness with a bias towards the customer that had a greater rate in the beginning. What if there is no such customer, that is, the trajectory starts at the fairness line? Since moving upwards along a line that passes through the origin and moving downwards at an angle of 45◦ means that the trajectory will never leave the fairness line, this control will eventually fluctuate around the optimum just like AIMD.
Therefore, the Internet community has become quite religious about ensuring scalability at all times – and it appears that they are doing the right thing. 1 The end-to-end argument When we are talking about the Internet, the key element of scalability is most certainly the end-to-end argument. This rule (or rather set of arguments with a common theme) was originally described in (Saltzer et al. 1984). It is often quoted to say that one should move complexities ‘out of the network’ (towards endpoints, upwards in the protocol stack) and keep the network itself as ‘simple as possible’.
Network Congestion Control: Managing Internet Traffic by Michael Welzl
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