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The enhanced method of calculating the probability of message compromising in a communication network when using overlapping routes with series-parallel and combined structure are considered. A number of numerical examples have been used to analyze the influence on message compromising of security parameters belonging to certain elements (links) and fragments of the network. It is shown that the proposed...
In this paper, in order to increase the scalability of the communication network, a three-level method of hierarchical coordination routing in multi-area network is proposed, which is based on the principle of goal coordination. The method is based on the decomposition representation of the flow-based routing model and it includes three levels of the calculation hierarchy: at the zero level, the routing...
Method for calculating routing cost of MPLS network is presented in the work. This method allows to minimize routing cost, taking into account traffic fractal properties, choice of traffic transmission path and quality of service requirements. The method uses values of the Hurst parameter and value of normalized spread of traffic values, which makes it possible to apply it to self-similar and multifractal...
A flow-based model of fault-tolerant routing with path protection has been improved. In the course of the improvement, when the fault-tolerant routing problem was presented in optimization form, an optimality criterion has been formulated, which contains the conditions for path protection when it is possible to implement both single path and multipath routing strategies. The novelty of the proposed...
A flow-aware approach of evaluating the probability of compromise in combined structure network is presented. Experimental and numerical examples have been used to analyze the influence on flow compromising of security parameters of network links and fragments. It is shown that the proposed approach gives more precise results of calculation the probability of flow compromise when using overlapping...
In this paper for the first time the mathematical model and the two-level method of fault-tolerant inter-domain routing in telecommunications networks was presented. The novelty of the model is its decomposed representation and formulation the inter-area interworking conditions. The implementation of these conditions guaranteed the connectivity of calculated inter-area paths. The research of the proposed...
The tensor model of QoS-routing has been proposed, where accounting of the network state dynamics was performed. The QoS-routing problem has been reduced to solution of the optimization problem associated with differentiated maximization the probability of timely delivery of packet flows in the network having a different service priority.
The default gateway protection scheme in fault-tolerant IP routing is proposed in the given paper. In solving the technological problem of the fault-tolerant IP routing, it is necessary to solve either mixed integer nonlinear programming problem during minimization of the object function, or nonlinear programming problem with limitations defined. The proposed model also provides the support of load...
The routing tensor model in the basis of interpolar paths and internal node pairs with the guarantees by the packet rate and end-to-end delay is presented. The research demonstrated that the guarantees is provided for all paths in realization of the routing tensor model. The use of specified coordinate system facilitates compliance with the requirements for the packet end-to-end delay, i.e. average...
Dynamic presentation of tensor model for multipath routing with QoS guarantees over the multiple parameters proposed. Expressions for different queuing systems modeling state of the network router interface used for representing the average packet delay as time-varying function. Conditions of ensuring QoS for the set of parameters as packet transmission rate and average delay obtained. The novelty...
In this paper the fault-tolerant IP routing flow-based model presented. In solving the technological problem of fault-tolerant IP routing it is necessary during minimization of object function to solve either linear programming problem or Boolean programming problem with limitations defined. Proposed model also provides the support of traffic balancing functions on the virtual router interfaces, which...
Results of investigation of impact factors to queue utilization dynamics on telecommunication network routers were presented. As was shown by the analysis, use of dynamic model, obtained by applying a Pointwise Stationary Fluid Flow Approximation (PSFFA), demonstrated that the average queue length converges to a steady state value for some time, which can range from few to tens of seconds. It is determined...
Enhanced solution of topical scientific and practical problem associated with the development of flow-based model of multipath routing with paths overlapping by nodes in Telecommunication Network (TCN) was presented. This model is further extension of the well known multipath routing model based on the introduction to the structure of non-linear constraints responsible for the calculation of routes...
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