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Network Function Virtualization (NFV) is an emerging technology proposed to improve service provisioning in telecommunication industry. The flexibility of NFV enables network operator to dynamically deploy Virtual Network Functions (VNFs) according to real-time requirements. However, a large amount of VNFs with low utilization may be deployed in network due to dynamic arrival and departure of services...
One of the challenge issues in network virtualization is the efficient mapping of a virtual network (VN) onto a shared substrate network. The VN mapping problem has been addressed by various researchers. However, these solutions and associated algorithms are only efficient for building unicast service oriented virtual networks, and are not applicable to multicast service oriented VNs. Furthermore,...
Virtualization is a common technology for resource sharing in data center. To make efficient use of data center resources, the key challenge is to map customer demands (modeled as virtual data center, VDC) to the physical data center effectively. In this paper, we focus on this problem. Distinct with previous works, our study of VDC embedding problem is under the assumption that switch resource is...
Network virtualization allows the coexistence of multiple virtual networks on a shared substrate network. A virtual network created by a service provider (SP) typically spans across multiple domains that may be managed by different infrastructure providers (InPs). The topology and resource information on each domain is confidential and kept private by the InP. However, a domain-level view is required...
As network virtualization becomes popular, the problem of efficiently mapping a virtual infrastructure (VI) over a substrate network while guaranteeing its survivability in the event of failures becomes increasingly important. In this paper, we study the survivable VI mapping problem to recover from facility node failures. We develop two solutions namely the 1-redundant scheme and the K-redundant...
We propose l-redundant and K-redundant schemes for the design and mapping of survivable virtual infrastructure to recover from facility node failures while minimizing network costs. The efficiency of our solutions is compared using simulation.
As virtualization becomes more and more popular, how to guarantee survivability of a virtual infrastructure (VI) over a wide-area optical network is increasingly important. In this paper, we approach the problem of survivable VI mapping (SVIM) from a few unique perspectives. One of the most distinguishing perspectives is that a large-scale regional failure could destroy one or more facility nodes...
Network virtualization is an important technique for designing the future Internet architecture. Virtualization can help diversify the Internet by supporting multiple virtual network services and architectures on a shared substrate. Making efficient use of the underlying substrate network resources requires effective algorithms for virtual network embedding (VNE) that maps each virtual network (VN)...
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