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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...
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 Fast ReRoute flow-based model has been improved, where the node and link protection schemes in the linear form were formulated with the implementation of single path and multipath routing strategies. The use of linear-quadratic optimality criterion was substantiated, and the system hierarchy relations of weight coefficients in the objective function were determined with the aim to ensure maximum...
In this paper the improvement of the flow-based load balancing model for multipath routing in telecommunications networks with nonuniform topology were proposed through transition to complex optimality criterion of the solutions obtained. The proposed criterion is of the linear-quadratic character, which allowed a more detailed account of the each network link utilization separately and substantiated...
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 dynamics analysis of multipath QoS-routing tensor model with support of different flows classes is presented. The novelty of the tensor model is a representation of its covariant and contravariant components and metric of the introduced geometrical space as a function of time. The QoS-routing guarantees for different flows classes with different metrics such as average packet rate and average...
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 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...
In modern telecommunication networks very acute problem is an increasing of scalability. The most effective solution is the usage of hierarchical routing which assumes that decomposition of the network into areas. The paper proposed the method of hierarchical inter-area routing based on the goal coordination principle. The proposed method is based on flow-based model of inter-area routing. In numerical...
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...
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...
To improve scalability of multicast routing solutions the method of hierarchical routing with coordination was proposed. It is based on the decomposition representation of the flow-based model of multicast routing. The usage of this method allowed decentralizing the calculation of the multicast routes in the border routers of telecommunication networks.
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...
In this paper the flow-based model of multicast routing was researched. To improve the scalability of the network the hierarchical approach of the network is used because usage of centralized schemes is very resource-intensive. Due to disagreement of solutions obtained on routers and thus appearance of the link overloading and the subsequent package lost we proposed to use the goal coordination method...
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...
Solution of actual scientific and practical problem associated with the development of flow-based model of multipath routing with traffic policing rejection balancing was presented. Within the proposed model consistent solution of problem of multipath routing with traffic policing rejection balancing converged to solution of optimization problem of linear programming with the optimality criterion...
Effective solution for scalability and productivity improvement in fault-tolerant routing using the flow-based model was proposed. In practice, the fault-tolerant routing based on reservation of network resources is usually associated with decrease in overall performance and scalability of protocol solutions. In this regard, in structure of the model introduced conditions that are responsible for...
Schemes for protection of a node, a link and a rout under fault-tolerant multicast routing are presented for a multiflow case. The schemes are based on a nonlinear flow model which has the conditions for preventing links overload modified for a case when not all flows can switch to backup routs but only some of them. Scheme operability is demonstrated on a numerical example which has proven effectiveness...
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