Download PDF by Jose Brazio, Phuoc Tran-Gia, Nail Akar, Andrzej Beben,: Analysis and Design of Advanced Multiservice Networks

By Jose Brazio, Phuoc Tran-Gia, Nail Akar, Andrzej Beben, Wojciech Burakowski, Markus Fiedler, Ezhan Karasan, Michael Menth, Philippe Olivier, Kurt Tutschku, Sabine Wittevrongel

ISBN-10: 038728172X

ISBN-13: 9780387281728

ISBN-10: 0387281738

ISBN-13: 9780387281735

The hot development in the direction of the interoperability of routinely separate networks, equivalent to terrestrial, wireless/cellular, and satellite tv for pc, for the help of multimedia functions poses new and considerably difficult difficulties to community layout. This booklet stories at the state of the art paintings built through the 4 years of operation of the price 279 motion, research and layout of complicated Multiservice Networks aiding Mobility, Multimedia, and Internetworking, via its engaging researchers, originating from over forty examine associations from the tutorial, commercial, and telecom operator worlds. The paintings contains either primary, methodological, and utilized points of community functionality assessment and layout. research and layout of complicated Multiservice Networks aiding Mobility, Multimedia, and Internetworking features a targeted account of the paintings constructed, supported on an in depth bibliography of fabric released within the peer-reviewed literature. It includes the next six chapters: IP-Based NetworksQueueing versions site visitors size, Characterization, and ModelingWireless NetworksOptical NetworksPeer-to-Peer providers research and layout of complex Multiservice Networks aiding Mobility, Multimedia, and Internetworking will entice either practitioners of community layout, and to researchers aiming to map destiny instructions in networking learn.

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Additional info for Analysis and Design of Advanced Multiservice Networks Supporting Mobility, Multimedia, and Internetworking: COST Action 279 Final Report

Example text

Now, the network operated with CO needs more resources than operated with AC methods, for sufficiently high hot spot factors. 4. 8: Required capacity for CO relative to LB NAC and BBB NAC, and the corresponding blocking probabilities for both NAC methods additional capacity does not scale with the hot spot factor. The reason for that is the following. A link carries aggregated flows leading to or coming from a hot spot, therefore their rates scale with fh . But, in addition, the links also carry transit traffic whose rates are possibly slightly decreased by the hot spot event (recall that the overall traffic volume is kept constant).

In case of congestion, the node which is sending out traffic directly on the congested link will immediately react to overload by trying to put more load on available alternative paths. At the same time, this node will send so called “backpressure messages” to each of its neighbor nodes, notifying them to which extent traffic they are sending is present on the congested link. In other words, the neighbor nodes are informed about their contribution to congestion. In turn, these neighbors will also try to offload their links directed towards the congestion hotspot and will pass similar congestion indications, in the form of backpressure messages, on to their neighbor nodes.

In such cases the network capacity is badly distributed among the budgets and capacity should be renegotiated. The AQUILA architecture is conceived to perform such a renegotiation in a layered and scalable way [36], and algorithms to achieve the redistribution are investigated in [37]. Capacity renegotiation among border routers needs some signalling efforts and should not be triggered for very small capacity units. Hence, capacity budgets are increased by a chunk of bandwidth, which leads to over-reservation for traffic aggregates.

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Analysis and Design of Advanced Multiservice Networks Supporting Mobility, Multimedia, and Internetworking: COST Action 279 Final Report by Jose Brazio, Phuoc Tran-Gia, Nail Akar, Andrzej Beben, Wojciech Burakowski, Markus Fiedler, Ezhan Karasan, Michael Menth, Philippe Olivier, Kurt Tutschku, Sabine Wittevrongel


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