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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...
The paper proposes a method of hierarchical QoS routing based on reservation of network resources. It describes the case of organization of distributed source routing when one of the border routers consistently solves two interconnected network tasks: calculation of the required routes and determination of the allocation order of link resource to be reserved in order to meet end-to-end QoS-requirements...
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 improvement of the scalability of routing decisions is quite relevant in modern telecommunication networks. In this regard, effective approach is associated with the implementation of hierarchical routing. This involves carrying out a structural and functional decomposition of the network, based on the introduction and supporting of multi-level routing decisions. However, the existing protocol...
The fault-tolerance improvement for the core and edge of the IP network is proposed in the given paper. In solving the technological problem of the fault-tolerant IP routing during minimization of the object function it is necessary to solve either quadratic programming problem or mixed integer nonlinear programming problem with limitations defined. The proposed model also provides the support of...
The QoS solution of traffic management based on the dynamic tensor model in the coordinate system of interpolar paths and internal node pairs is presented. The conditions of ensuring QoS-routing for different flows classes along multiple paths for the set of metrics as the packet rate and average packet end-to-end delay are expressed. The research results demonstrated that it is important to take...
The investigation of the multipath QoS-routing dynamic tensor model with quality of service guarantees over the multiple metrics is presented. The expression for modeling state of the network router interface is used for representing the average packet delay as time-varying function. The conditions of ensuring QoS for the set of metrics as the packet rate and average delay are expressed. 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...
Flow-based model for traffic management in communication network were proposed, which provides a consistent solution of the following network tasks: multipath routing; traffic policing; and dynamic allocation of network throughput among the users flows. Obtained solutions provide the required values of the key indicators of Quality of Service such as packet rate, average delay and packet loss probability.
In this paper the dynamic routing model of TCN is proposed. The novelty is that it is presented as a system of linear differential equations to describe the process of redistribution capacities of links and nonlinear algebraic equations to describe the routing of flows and congestion control. Using this model gives the opportunity to provide more efficient management of TCN resources when multiservice...
In this paper an approach to the flow-based modeling of two-level routing in multiservice networks is considered. The model supports the source routing. At the low level - the level of edge routers - the routes are directly computed, and at the top level the received decisions are coordinated for excluding overloads of communication channels in a multiservice network.
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