… to solve the virtual network embedding problem, as a simultaneous optimization of virtual
nodes and links placement, providing the optimal boundary for each virtual network mapping. …

… We define the generic VNF chain routing optimization problem and devise a mixed integer
linear programming formulation. By extensive simulation on realistic ISP topologies, we draw …

… 3) Metaheuristic solutions: VNE can be seen as a combinatorial optimization problem where
an optimal solution is sought over a discrete search-space. As the optimal solution for large …

… , we formulate the VNE problem of SDN as a multiobjective optimization problem which …
the VNE problem of a number of virtual networks into a series of single VNE problems. It should …

… network. We present an integer linear programming formulation for this optimization problem
… discrete Particle Swarm Optimization algorithm to approximate this problem. Extensive …

… The nature of the network presence that the virtual machine gets depends solely on the … To
deal with this network problem we developed VNET [8], a simple layer two virtual network tool…

… virtual network function placement and network embedding can be formulated as a mathematical
optimization problem … optimization problem, where NSs need to be placed on top of the …

… optimization problem, so it is not directly applicable to the optimal VN … problem, which is a
discrete optimization problem. (ii) Because the formulations of the VN embedding problem are …

… problem to one. We show that VNE is still strongly NP-hard when a single virtual network
request is present or when each virtual … variants of VNE as optimization problems adopt a two…

… In this paper, we approach VNF placement and chaining as an optimization problem, and
propose a fix-and-optimize-based heuristic algorithm for tackling it. Our algorithm incorporates …