Edge Computing Oriented Virtual Optical Network Mapping Strategy Based on Comprehensive Fragmentation Awareness

Virtual networks for edge computing services greatly worsen the problem of spectrum fragments in Elastic Optical Networks (EON). Aimed to solve this problem, this paper proposes a virtual network mapping strategy based on comprehensive fragments awareness of all links and nodes, by taking both spectrum and time factors into consideration. Moreover, the physical node importance factor is also introduced into this comprehensive fragment awareness. To keep the balance of fragments situation in the EON, all these factors can be transformed into one comprehensive model. Thus, the virtual network mapping can be conducted with less fragments and better traffic balance. Test results show that the proposed approach can reduce blocking rate by about 14.5% and the supporting ability for edge computing services is greatly improved.