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The approach to simulation of queue management processes on nodes of an active network is proposed. The model is presented by a triplanar transportation problem of linear programming. The area of the model application is Next Generation Networks that function on the basis of active technologies.
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...
A fault-tolerant routing model for unicast flows in MPLS-network is proposed. The flow-oriented model is represented by algebraic equations and inequalities characterizing the state of MPLS-network, i.e. load of its communication links. The proposed model includes the possibility to implement three basic backup schemes in accordance with the concept of Fast ReRoute: link, node and path protection...
To avoid overload of links, as well as packet loss in the network uses the coordination method. This method is based on the possibility of converting the original minimization problem in a simpler maximization problem and the solution of this problem using a two-level iterative computational structure. In this paper the analysis of convergence of the two-level hierarchical routing method with coordination...
The following paper presents queue management model that includes congestion avoidance mechanism and suitable for using on telecommunication network nodes. Within the proposed model on a network node consistently was solved Congestion Management and Congestion Avoidance tasks. At the same time general queue management task was reduced to solving of optimization problem. Within the congestion avoidance...
The paper presents the dynamic adaptive queue balancing method that was designed for solving queues balancing problem on the telecommunication network routers. Within the method the adaptive use of flow-based models with varying degrees of accounting parameters was proposed. By using dynamic adaptive method the research of the queue balancing process was performed.
In the paper a tensor model for telecommunication network from reliability point of view is given. A condition for ensuring required quality of service in networks with using Tail Drop and RED mechanisms is formulated.
In the paper the mathematical model of multipath routing with load balancing in the MPLS network is proposed. This model describes the processes of routing and distribution links resource. This model takes into account the characters of links (duplex, half-duplex or simplex links) and prevents the effect of packets looping. And criterion of load balancing in proposed model is quality service parameters.
The paper proposed a dynamic model of the structural-functional synthesis of transport telecommunication network (TCN). The model provides a consistent solution for problems of the choice of topology and channels bandwidth in TCN, flow distribution, and determine the order of connection fees to the nodes of the TCN. Development of model allowed to formulate the task of structurally-functional synthesis...
Design of schemes for MPLS Fast ReRoute is proposed in the paper. The scheme allows for the same flow calculate two types of paths: primary and backup. Depending on the parameters of the scheme it is possible to implement different schemes of reservation: link, node or path protection. In the course of solving the problem of MPLS Fast Reroute the classical metric of primary and backup paths is minimized...
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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