Capacity planning in IP Virtual Private Networks under mixed traffic

被引：4
作者：
Bolla, R [1 ]
Bruschi, R [1 ]
Davoli, F [1 ]
机构：
[1] Univ Genoa, DIST, Dept Commun Comp & Syst Sci, I-16145 Genoa, Italy
来源：
COMPUTER NETWORKS | 2006年 / 50卷 / 08期
关键词：
virtual private networks; network planning; multiservice networks; QoS; hybrid models;
D O I：
10.1016/j.comnet.2005.09.012
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
A new mechanism for capacity planning of a Virtual Private Network, carrying both Quality of Service (QoS) and Best-Effort (BE) IP traffic is introduced. The link bandwidth allocation in the network is based on a hybrid combination of analytical and simulation models. The allocation tool works in three phases: phase I and 2 deal with the assessment of the capacities needed to satisfy requirements for QoS and BE traffic individually; the effects of multiplexing gains arising from traffic mixing are taken into account in phase 3. There are two analytical parts, based on a simplified version of call-level traffic models, derived from teletraffic theory of circuit-switched networks, and on an algorithmic procedure to compute the distribution of average values of BE traffic flows, respectively. The same algorithm is used inside a fast simulation model, adopting a fluid representation of TCP traffic aggregates. The tool is tested both on simple networks and on a more complex real national backbone. (c) 2005 Published by Elsevier B.V.
引用
收藏
页码：1069 / 1085
页数：17
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