SiMPLE: Survivability in multi-path link embedding

Abstract

Internet applications are deployed on the same network infrastructure, yet they have diverse performance and functional requirements. The Internet was not originally designed to support the diversity of current applications. Network Virtualization can enable heterogeneous applications and network architectures to coexist without interference on the same infrastructure. Embedding a Virtual Network (VN) into a physical network is a fundamental problem in Network Virtualization. A VN Embedding that aims to survive physical (e.g., link) failures is known as the Survivable Virtual Network Embedding (SVNE). A key challenge in the SVNE problem is to ensure VN survivability with minimal resource redundancy. To address this challenge, we propose SiMPLE. By exploiting path diversity in the physical network, SiMPLE provides guaranteed VN survivability against single link failure. In addition, SiMPLE produces highly surviv-able VN embeddings in presence of multiple link failures while incurring very low resource redundancy. We provide an ILP formulation for this problem and implement it using GLPK. We also propose a greedy algorithm to solve larger instances of the problem. Simulation results show that our solution outperforms full backup and shared backup schemes for SVNE, and produces near-optimal results.