GreenCloud for Simulating QoS-Based NaaS in Cloud Computing

Cloud computing that was introduced when local facilities could not any more satisfy access demands along with the increase of network bandwidth and diversity of services, breaks constraints of physical deployment and delivers varieties of services in its hardware/software virtualized manner. Being inherited the idea, the NaaS as a new presented research field ever since the cloud computing being introduced, delivers network itself as a kind of service under such circumstances. By its concept, the network utilization will no longer be restricted by physical network or local facilities, but is able to expropriate any network resources within the cloud once they are virtualization organized. Green Cloud simulation as one of the NS-2 cloud computing simulators, implements an energy-aware cloud computing scenario with infrastructures (switches, routers, links, etc.) virtualized in data center. In this paper, we discusses the Network as a Service (NaaS), a cloud architecture that delivers virtualized network as per demands from cloud user, with illustration of QoS-based Green Cloud simulation, that to present the behavior and performance of NaaS in cloud computing environment.