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Network virtualization is a way to simultaneously run multiple heterogeneousarchitectures on a shared substrate. The main issue in network virtualizationis mapping virtual networks to substrate network. How to manage substrateresources in mapping phase will have an effective role in improving the use ofinfrastructure resources. Using software-based networks in networkvirtualization which separates control logic from data as a new technology, hasled to efficient resource management in this context. In this article asoftware-based network approach has been presented to network virtualizationand manage infrastructure resources efficiently. It optimizes mapping functionby dynamic resource management of infrastructure resource. We have added amodule in the controller to manage the resources dynamically. An initialmapping will be done for arriving new requests based on number of successfulrequests and arriving time slots. They will not be finalized by writing therules in the switches before arriving n requests. If some remapping during then time window is needed, remapping can be done by the controller and the finalresults are sent to the switches to write the flow rules. The simulation hasbeen done using NS2 simulator showed based on different evaluation criteriasuch as acceptance rate, average link utilization, cost and delay. Keywords:network virtualization, software based network, Virtual network mapping,substrate network, Virtual network.

Improving Resources Management in Network Virtualization by Utilizing a Software-Based Network