Using AHP/TOPSIS with cost and robustness criteria for virtual network node assignment

In future Internet architectures, Virtual Network Providers (VNP) must be able to compose virtual networks in a way that balances security with other priorities as expressed by Service Providers (SP). In this paper, we outline a framework in which a VNP can assess the security and assurance (robustness) properties of virtual networks and use these to help select an SP-appropriate topology. The topology selection algorithm is based on the Analytic Hierarchy Process (AHP) and the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) and uses cost and robustness as selection constraints. Our framework allows the VNP to identify the customer's needs for security and balance these with other priorities such as quality of service and cost. We show that this approach fits naturally into the business model of the VNP and takes advantage of risk management activities that may already be performed by SPs. Because security concerns can dampen enthusiasm for new ways of doing business, addressing the challenges above can help ease the transition to the future Internet.