Research on Survivability Strategies of Virtual Network
Subhadeep Sahoo (Chongqing University of Posts, Telecommunications,, China)

TL;DR
This paper investigates survivability strategies for virtual networks in cloud environments, proposing coordinated embedding and evacuation methods to enhance resource efficiency and disaster resilience.
Contribution
It introduces an adaptive path splitting scheme for survivable VNE and a synchronous evacuation strategy for dual-VMs in disaster zones, addressing key survivability challenges.
Findings
APSS achieves better spectrum utilization and lower blocking ratio.
The evacuation strategy reduces dual-VM evacuation times.
Proposed methods outperform existing schemes in simulations.
Abstract
Virtualization facilitates heterogeneous cloud applications to share the same physical infrastructure with admirable flexibility, while resource efficiency and survivability are critical concerns for virtual network embedding (VNE). As more and more internet applications migrate to the cloud, the resource efficiency and the survivability of VNs, such as single link failure or large-scale disaster survivability, have become crucial issues. Separating the VNE problem into node and link mapping sub-problems without coordination might cause a high embedding cost. This dissertation presents two independent approaches to solve the aforementioned challenges. First, we study two-stage coordinated survivable VNE (SVNE) problem and propose an adaptive path splitting based SVNE (APSS) scheme. We first develop a concise anchor node strategy to restrict the solution space of the candidate substrate…
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