A Node Position Based Virtual Network Mapping Algorithm for Software-defined Satellite Network

For the software-defined satellite network (SDSN) architecture, the limited physical resources of satellite network and on-board service resources could be abstracted into multiple virtual network planes by virtualization technology, which provides great advantages for expanding the capability and application scopes of satellite network. In this paper, we define the basic architecture of the software-defined satellite network, and on this basis, we propose a virtual network mapping algorithm based on the position of satellite nodes. Considering the distance between the substrate nodes and the duration of the link in SDSN, this method can dynamically allocate available resources for the continuously arriving virtual network requests and effectively improve the utilization rate of the substrate network resources and the acceptance rate of the virtual network requests. The effectiveness and efficiency of the proposed algorithm are verified by simulation experiments.