Recently, Li Xiuhua, a researcher of the Hundred Talents Program introduced by the School of Big Data and Software, as the first author, jointly published the article "Hierarchical Edge Caching in Device-to-Device Aided Mobile Networks: Modeling, Optimization, and Design" with his doctoral tutor Victor C. M. Leung (IEEE Fellow, academicians of Royal Canadian Academy of Sciences, Academy of Engineering and Engineering Research Institute). The article is on the official homepage of IEEE. Besides, as Featured Author invited by Li Xiuhua, Professor Victor C. M. Leung attended the "Smart Internet of Things and Industrial Empowerment Summit Forum" of the Second China Smart Expo hold in Chongqing and gave academic reports on Internet of Things to teachers and students of Chongqing University.

In this paper, the concept of "hierarchical edge caching" was put forward earlier in the network field, and the author addresses the system modeling, large-scale optimization, and framework design of hierarchical edge caching in device-to-device aided mobile networks. It also investigates the maximum capacity of the network infrastructure in terms of offloading network traffic, reducing system costs, and supporting content requests from mobile users locally.

The periodical IEEE Journal on Selected Areas in Communications (JSAC) is the top periodical in the network field, the A-class periodical recommended by china computer federation (CCF) as "international top periodical, encouraging Chinese scholars to break through", and the periodicals in JCR 1 and SCI 1 of Chinese Academy of Sciences, with an impact factor of 11.554.

The first author of this article is Li Xiuhua, a researcher of Chongqing University, and the co-authors include Professor Wang Xiaofei of Tianjin University (a national high-level overseas talent), Professor Peng-Jun Wan of Illinois Institute of Technology (IEEE Fellow), Professor Zhu Han of Houston University (IEEE Fellow, AAAS Fellow) and Professor Victor C. M. Leung. Li Xiuhua graduated from Harbin Institute of Technology with a bachelor's degree and a master's degree. He graduated from the University of British Columbia with a doctor's degree. He was employed as a researcher in the Hundred Talents Program of our university in February 2019 and served as the director of the Institute of Intelligent Software and Service Computing under the MOE Key Laboratory of Dependable Service Computing in Cyber Physical Society of Chongqing University.