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Khaled Alhazmi,Abdallah Shami,Ahmed Refaey Hussein 한국통신학회 2017 Journal of communications and networks Vol.19 No.4
Cloud computing provides on-demand IT services vialarge distributed datacenters over high-speed networks. Virtualization,a key cloud computing technology, allows service providersto offer computing services in cloud environments without platformcompatibility discrepancies. The recent proliferation of cloudcomputing has rekindled interest in network virtualization. Thus,network virtualization is emerging as a polymorphic approachfor the future Internet that will facilitate the use of shared resources. Virtual network provisioning is considered to be a mainresource allocation challenge in any virtualized network environment. Software-defined networking (SDN) imparts flexibility toa network by removing the control layer from the data transferlayer of the network and moving it to the control plane. Networkvirtualization is further employed to share physical infrastructureto enable multiple service providers to access the network. Flexibleaccess requires efficient management of network resources; theSDN control plane can be used for efficient management of virtualnetworks. In this study, we formulate virtual network provisioningin SDN-enabled, geographically distributed cloud computing datacentersas a mixed integer linear programming (MILP) problem. The formulation of the proposed optimized virtual network provisioning(OVNP) model is studied by means of simulations. The performanceof the proposed approach is measured against enhancednetwork cloud provisioning (ENCP), our previous research, andother recognized research focused on the ratio of successfully provisionedrequests and the efficiency of resource utilization. The resultsverify the effectiveness of the proposed approach.
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