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Additional resources for Analysis and Design of Advanced Multiservice Networks Supporting Mobility, Multimedia, and Internetworking: COST Action 279 Final Report
If only ILBs are used, the NAC scheme may be viewed as a local BB, having at its disposal a private share of the total network capacity, and is similar in that case to the hose model . 2 Performance of NAC Methods The average resource utilization in a suitably dimensioned network is a reasonable performance measure to compare NAC methods, from a resource efﬁciency point of view . 2, deployed within the COST Action 239 in order to evaluate possible solutions for an optical transmission infrastructure in Europe .
CHAPTER 1. 4. 4: A wide area network with B2B trafﬁc aggregates exhibiting busy hours at different times BBBs for NAC as well as Label Switched Paths (LSPs), used for trafﬁc engineering in Multi-Protocol Label Switching (MPLS) technology, can be viewed as capacity tunnels. If such capacity tunnels are used, bandwidth can be allocated to them either statically or dynamically. The trafﬁc rates of B2B trafﬁc aggregates usually ﬂuctuate on the basis of a 24 hour period. Therefore, capacity renegotiation or Multi-Hour Design (MHD) is especially useful to save some amount of capacity in wide area networks where B2B aggregates sharing a common link may show different phases.
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).