Xin LiAssociate Professor, School of Electronic Engineering, Beijing University of Posts and Telecommunications, China
Speech Title: Content Connectivity Based Polyhedron Protection against Multiple Link Failures in Optical Data Center Networks
Abstract: Survivability has always been an important research focus for optical networks. We have proven that the k-regular and k-edge connected structure is the optimal protection structure against multi-link failures. Based on the k-regular and k-edge connected structure, the p-polyhedron protection scheme which has low resource redundancy is proposed. In optical data center networks (ODCNs), the required data or services can be replicated and maintained in multiple geographically distributed data centers. Based on this, the content connectivity which represents the reachability of the required content from each user is defined for ODCNs. Moreover, the degree of content connectivity can be improved by increasing the number of copies of content. In ODCNs, the content connectivity can be integrated with the p-polyhedron protection scheme. With the help of content connectivity, the resource efficiency of the p-polyhedron protection scheme can be further improved. We proposes the content connectivity based polyhedron protection (CCPP) scheme to minimize the network redundancy of ODCNs. An ILP model and a heuristic algorithm are developed to realize the CCPP scheme under static and dynamic circumstances respectively. Numerical results show that the proposed CCPP scheme has a lower network redundancy. Moreover, the network redundancy of the CCPP scheme is positively correlated with the degree of content connectivity.
Biography: Li Xin, Associate Professor, Doctoral Supervisor. In 2014, he graduated from Beijing University of Posts and Telecommunications, majoring in communication and information systems. From 2015 to 2017, he did Post-Doctoral research in Beijing University of Posts and telecommunications. Since 2017, he has taught in the school of electronic engineering. In the past five years, he has published 55 academic papers, won 10 domestic authorized patents, won the best paper award of ICOCN2018, won the best paper award of OSN journal 2019, won the best paper award of ICOCN2021, and published the academic monograph "theory and method of optimal design of optical fiber communication network". In 2016, he won the first prize of China industry university research cooperation innovation achievement award, and in 2019, he won the first prize of Technology Invention Award of China Communications Society, In 2021, he won the first prize of the innovation award of the invention and entrepreneurship award of the China Invention Association, presided over one youth science fund project and one general project of the National Nature Fund, and presided over three horizontal projects.
Main Research Fields: data center optical network, optical network survivability, optical network security, software defined optical network (sdon), etc.