Cache-Based Wireless Device-to-Device Networks: Modeling, Analysis, and Design

Speaker: Mr. Ming-Chun Lee
Date: 2018-12-21 (Fri) 10:30 - 12:00
Location: Meeting Room 124 @ CITI
Host: Chih-Yu Wang


Demand for wireless video delivery services has dramatically increased in recent years and is expected to continue to grow. To respond to such growth, new architectures to increase capacity without excessive costs are required. This talk will present a new architecture, namely caching at wireless edge (or caching-based wireless network), for resolving this problem by exploiting the special asynchronous reuse feature of video demand, concentration of request of popularity, and cheap storage. The major developments of caching-based wireless network are on (i) distributed content caching in base stations with costly backhaul transmission and/or limited backhaul capacity but with considerable storage space; (ii) usage of the wireless devices as caching components and distributing video content through device-to-device (D2D) communications; and (iii) usage of caching at wireless devices and combining multicasting nature of wireless channel with coding. The first part of this talk will elaborate the motivations of caching-based wireless network, provide a historical overview of those three main research directions, as well as discuss their fundamental principles and scaling laws for the throughput. The results show that caching at wireless edge can improve video throughput by one to two orders-of-magnitude. The second part of this talk will discuss the recent technical development of caching-based wireless networks, including modeling, design, and practical evaluation. The emphasis will be on the newly proposed individual preference probability modeling and designs and evaluations for caching with D2D communications.


Ming-Chun Lee received the B.S. and M.S. degrees in Electrical and Computer Engineering from National Chiao Tung University (NCTU), Hsinchu, Taiwan, in 2012 and 2014, respectively. From 2014 to 2016, he was a research assistant in Wireless Communications Lab in the Research Center for Information Technology Innovation, Academia Sinica, Taiwan. During these periods, he worked toward topics of multi-antenna systems with Prof. Ta-Sung Lee at NCTU and Prof. Wei-Ho Chung at Academia Sinica.

He is now pursuing the Ph.D degree in Electrical Engineering at University of Southern California, and working as a research assistant in Wireless Devices and Systems (WiDeS) group. His current advisor is Prof. Andreas F. Molisch with whom he works in various directions of caching-based wireless device-to-device networks. He also cooperates with Prof. Nishanth Sastry at King’s College London and Prof. Mingyue Ji at University of Utah for proposing new models and analysis frameworks for caching-based networks, respectively.

His research interest includes signal processing, design, modeling, and analysis in wireless systems and networks. He is currently focusing on topics relevant to wireless caching-based networks. He has been the first author for more than 15 referred papers. He is the coauthor of a textbook leading by Prof. Ta-Sung Lee. He has been reviewers of many top conferences and journals.