題目一：When Multicast and Full-duplex Meet NOMA: Orthogonality versus Non-orthogonality

内容簡介：Next generation wireless networks are expected to support very diverse traffics with much tighter requirements, such as massive connectivity, better quality of service, higher throughput, lower latency, or lower control signaling overhead, which should be met with various new techniques such as non-orthogonal multiple access (NOMA) design. Different from conventional orthogonal multiple access (OMA) techniques, NOMA techniques can make more efficient use of transmission resources. On the other hand, mobile broadcast/multicast can significantly improve spectrum efficiency by using point-to-multipoint (PTM) mechanism which distributes the media content to all/partial interested users; the spectral efficiency of full-duplex (FD) bidirectional and cooperative communications can be doubled, provided that the severe self -interference (SI) can be efficiently eliminated. In this talk, basic orthogonal and non-orthogonal MA techniques shall be firstly outlined, then, based on our recent research, the co-existence of NOMA/Multicast, NOMA/FD, and NOMA/Relaying, shall be presented.

報告人：西南交通大學  範平志  教授

報告人簡介：工學博士，IEEE Fellow, IET Fellow, 國家973項目首席科學家，國家傑出青年科學基金獲得者，國家級有突出貢獻的中青年專家，IEEE VT學會傑出演講者(Distinguished Lecturer)。1997年起受聘英國Leeds大學客座教授。現任科技部“現代交通通信與傳感網絡”國家級國際聯合研究中心主任，西南交通大學移動通信研究所所長。範教授出版中英文著作8部（含編著），發表英文國際刊物論文290餘篇，連續多年入選愛思唯爾年度中國高被引學者榜單，榮獲IEEE VTS 2018年度Jack Neubauer獎。在指導畢業的博士研究生中，1名獲2003年度全國百篇優秀博士論文獎，1名獲2017年度中國電子教育學會優秀博士論文獎，多名獲省級和校級優秀博士論文獎。主要研究興趣為：通信-計算-存儲協同理論、高移動無線通信、信息理論與編碼、信号設計與處理等。

時  間：2018年11月26日（周一）上午10：30始

題目二：Fractional Programming for Coordinated Spectrum Sharing in Wireless Networks

内容簡介：Interference management is a key challenge for both cellular and device-to-device (D2D) communication networks, in which multiple transmitter and receiver pairs may arbitrarily interfere with each other with full frequency reuse. In this talk, we introduce a distributed spectrum sharing strategy called FPLinQ to alleviate inter-link interference by coordinating link schedule decisions throughout the network. Scheduling in the general setting is a challenging combinatorial optimization problem. In this talk, we devise a fractional programming (FP) approach to derive a reformulation whereby the integer variables are determined analytically in each iterative step. The resulting FPLinQ algorithm enables an iterative and distributed optimization of link schedule with provable convergence. The proposed strategy can be extended to include joint link scheduling and power control. The proposed strategy can further be used for interference aware uplink scheduling and beamforming in cellular networks. As compared to the existing works such as FlashLinQ, ITLinQ and ITLinQ+, a main advantage of the proposed strategy is that it does not require tuning of design parameters; it further shows significant performance advantage as compared to the benchmarks in maximizing the sum rate and the network utility.

報告人：加拿大工程院院士、多倫多大學  Wei Yu（郁炜）  教授

報告人簡介：Wei Yu (S'97-M'02-SM'08-F’14) received the B.A.Sc. degree in Computer Engineering and Mathematics from the University of Waterloo, Waterloo, Ontario, Canada in 1997 and M.S. and Ph.D. degrees in Electrical Engineering from Stanford University, Stanford, CA, in 1998 and 2002, respectively. Since 2002, he has been with the Electrical and Computer Engineering Department at the University of Toronto, Toronto, Ontario, Canada, where he is now Professor and holds a Canada Research Chair (Tier 1) in Information Theory and Wireless Communications. His main research interests include information theory, optimization, wireless communications and broadband access networks.

Prof. Wei Yu currently serves on the IEEE Information Theory Society Board of Governors (2015-20). He was an IEEE Communications Society Distinguished Lecturer (2015-16). He serves as an Area Editor for the IEEE Transactions on Wireless Communications (2017-20). He served as an Associate Editor for IEEE Transactions on Information Theory (2010-2013), as an Editor for IEEE Transactions on Communications (2009-2011), as an Editor (2004-2007) for IEEE Transactions on Wireless Communications, and as a Guest Editor for a number of special issues for the IEEE Journal on Selected Areas in Communications and the EURASIP Journal on Applied Signal Processing. He was a Technical Program co-chair of the IEEE Communication Theory Workshop in 2014, and a Technical Program Committee co-chair of the Communication Theory Symposium at the IEEE International Conference on Communications (ICC) in 2012. He is currently the Chair of the Signal Processing for Communications and Networking Technical Committee of the IEEE Signal Processing Society (2017-18) and served as a member in 2008-2013. Prof. Wei Yu received the IEEE Signal Processing Society Best Paper Award in 2017 and 2008, the Journal of Communications and Networks Best Paper Award in 2017, an E.W.R. Steacie Memorial Fellowship in 2015, an IEEE Communications Society Best Tutorial Paper Award in 2015, an IEEE ICC Best Paper Award in 2013, the McCharles Prize for Early Career Research Distinction in 2008, the Early Career Teaching Award from the Faculty of Applied Science and Engineering, University of Toronto in 2007, and an Early Researcher Award from Ontario in 2006. He is recognized as a Highly Cited Researcher.

Prof. Wei Yu is a Fellow of IEEE and a Fellow of Canadian Academy of Engineering. He is a member of the Royal Society of Canada's College of New Scholars, Artists and Scientists. He is a registered Professional Engineer in Ontario.

時  間：2018年11月26日（周一）下午3：00始

題目三：Placement Delivery Array and Its Applications

内容簡介：Recently, placement delivery array (PDA) was formulated to describe the placement and delivery phases with a single array for centralized coded caching scheme in an error- free shared link. In this talk, we explore PDA characterizations for two other models: device-to-device (D2D) network and distributed computing system. The inherent connections between these systems and the shared link caching system are displayed through PDA, which allows us to transform the PDA based schemes originally designated for shared link to those networks. As a result, combining with existing constructions, we can obtain schemes requiring low subpacketization level for D2D network or smaller number of files for distributed computing system.

報告人：西南交通大學  唐小虎  教授

報告人簡介：博士生導師。曾任香港科技大學副研究員，德國Ulm大學客座教授。2003年獲得全國百篇博士學位論文獎，2007年獲德國洪堡基金，2013獲國家傑出青年基金，2013年獲得全國百篇博士學位論文指導教師獎，2014年入選教育部長江學者特聘教授，2018年入選萬人計劃中青年科技創新領軍人才。近年來主持自然科學基金、教育部重大項目等多項國家級省部級科研項目，在國際重要學術期刊發表論文SCI檢索論文100餘篇，其中包括信息領域國際旗艦期刊IEEE Transactions on Information Theory論文50篇。

時  間：2018年11月26日（周一）下午4：00始

地  點：南海樓224室

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2018年11月21日