SDN-based network virtualization resource management architecture and mapping algorithm

Abstract

With the vigorous development of computing theory and network technology, new network forms are constantly emerging. The network has begun to change from "network center system" to "application center system" in functional form, and all services will gradually become the ultimate goal of future network development. The idea of centralized control of Software Defined Network (SDN) provides a simpler and more flexible way for the realization of network virtualization. SDN, as a new network architecture, brings new vitality and challenges to the traditional network. The basic idea of separation of control and forwarding makes the control and management of the network more efficient and flexible. However, a key problem faced by traditional network and network virtualization under SDN is Virtual Network Mapping (VNM) or Virtual Network Embedding (VNE). The proposal of network virtualization provides a good idea to solve this deadlock: abstract the underlying resources so that multiple heterogeneous logical networks can independently deploy their own protocols, which plays an important role in promoting the development of new network architecture and protocol verification. Virtualization technology can support multiple heterogeneous network architectures to share the same underlying physical network facilities, support flexible resource management and scheduling strategies, and maximize the use of physical network resources. It allows multiple heterogeneous virtual subnets to coexist virtually in the same physical environment without affecting the normal operation of the existing network system. Therefore, this paper combines SDN network architecture with network virtualization technology, focusing on the virtual network mapping algorithm in virtualization technology.