A SFC Placement Strategy in Low-Visibility Multi-Domains Networks for Low Resource Usage Cost
Qingli Xiong, Zhuofan Liao, Xiaoyong Tang · 2024
The concept of Network Function Virtualization (NFV) enables the realization of services as a Service Function Chain (SFC) that is composed of multiple Virtual Network Functions (VNFs), allowing for flexible deployment across the network. For wireless networks comprised of diverse domains which means be managed by different network providers, each domain has different resource and transmission costs. Due to commercial confidentiality reasons, the internal information of these domains is not interconnected, which increases the difficulty of SFC deployment. How to deploy SFCs in multi-domains networks at the lowest cost is becoming a challenge. This paper proposes a novel strategy for the scenario that information of sub-domain is invisible. The strategy firstly splits the SFC based on the processing dependency of its VNFs to reduce intermediate data transmission. Then it utilizes a Graph Matching Network (GMN) to evaluate the matching degree between sub-domain and SFC fragment. This matching degree acts as a reference for optimizing SFC allocation, thereby avoiding the direct acquisition of internal sub-domain information. Simulation results demonstrate that the proposed strategy not only significantly reduces resource, but also maintains a higher request acceptance ratio.