Download e-book for iPad: Performance of Communication Systems: A Model-Based Approach by Alexander Ost

By Alexander Ost

This e-book offers an in depth method of aid the making plans and optimization method for contemporary communique networks. in response to an research of the most important houses of recent community architectures, a collection of necessities for such ways is derived. A model-based functionality overview strategy is advised, the place highly-efficient matrix-geometric equipment are hired with the intention to stay clear of the drawbacks of current numerical and simulative ways. The ebook includes a thorough survey and an in depth comparability of state of the art numerical algorithms within the matrix-geometric box. A high-level modeling strategy according to stochastic Petri nets is constructed so one can simplify the specification of complicated types. to demonstrate the process, numerous case experiences are provided, protecting software parts from ATM networks to world-wide-web site visitors and TCP/IP networking.

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Extra info for Performance of Communication Systems: A Model-Based Approach with Matrix-Geometric Methods

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These requirements are essential to specify and compare different distribution scenarios. In addition, it has been stated that - it must be possible to specify the load offered to the system and to specify the distribution of the overall load to individual functional entities. Clearly, the load distribution within the system is closely related to the mapping of functional to physical entities mentioned above. Analysis. Concerning the model analysis, an important point is the discovery of bottleneck components in the system.

Here, we focus on two related case studies only. In the first study, a bottlenecks is identified in the VPN system, and then removed by changing the mapping of virtual service devices to physical nodes. As an alternative to this approach for tackling the bottleneck situation, we increase the physical node speeds in the second case study, and compare the costs and merits of this to the reconfiguration case. In the experiments, the following three properties are considered to describe the system performance: 1.

In [202, 197, 116], a simulation-based approach for TINA networks is presented. Using a system description in the specification and description language (SDL), results are obtained for the TINA system throughput. While the authors employ a rather detailed description of the messages interchanged in the network, they assume a fully connected network and neglect propagation delays (a situation which will not be given as soon as the system under consideration is larger than a local Ethernet-based network).

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