Theoretische Grundlagen der Kommunikationstechnik

Invitation To A Talk by Dr. Ying Cui (Shanghai Jiao Tong University, China)

Time25 November 2015, 11:00 AM  
LocationHFT - Hochfrequenztechnik building, 6th floor, Room HFT-TA 617, Einsteinufer 25, 10587 Berlin  
TitleAnalysis and Optimization of Caching and Multicasting in Large-Scale Cache-Enabled Wireless Networks  


Caching and multicasting at base stations are two promising approaches to support massive content delivery over wireless networks. However, existing analysis and designs do not fully explore and exploit the potential advantages of the two approaches. In this paper, we jointly consider caching and multicasting to maximize the successful transmission probability in large-scale cache-enabled wireless networks. We propose a random caching and multicasting scheme with a design parameter. Utilizing tools from stochastic geometry, we derive a tractable expression and a closed-form expression for the successful transmission probability in the general region and high signal-to-noise ratio (SNR) and user density region, respectively. Then, using optimization techniques, we develop an iterative numerical algorithm to obtain a local optimal design in the general region, and also derive a simple asymptotically optimal design in the high SNR and user density region, which provides important design insights. Finally, by numerical simulations, we show that the asymptotically optimal design has much lower computational complexity than the local optimal design and achieves a significant performance gain over some baseline schemes in the general region, and hence is applicable and effective in practical cache-enabled wireless networks.



Ying Cui received her B.E. degree in Electronic and Information Engineering from Xi'an Jiao Tong University, China, in 2007 and her Ph.D. degree in Electronic and Computer Engineering from the Hong Kong University of Science and Technology (HKUST), Hong Kong, in 2011. From January 2011 to July 2011, she was a Visiting Assistant in Research in the Department of Electrical Engineering at Yale University, US. From March 2012 to June 2012, she was a Visiting Scholar in the Department of Electronic Engineering at Macquarie University, Australia. From June 2012 to June 2013, she was a Postdoctoral Research Associate in the Department of Electrical and Computer Engineering at Northeastern University, US. From July 2013 to December 2014, she was a Postdoctoral Research Associate in the Department of Electrical Engineering and Computer Science at Massachusetts Institute of Technology (MIT), US. Since January 2015, she has been with the Department of Electronic Engineering at Shanghai Jiao Tong University, China. She was selected into China's 1000Plan Program for Young Talents in 2013. She was the recipient of IEEE ICC best paper award in 2015. Her current research interests include delay-sensitive cross-layer control and optimization, cached-enabled wireless networks, future Internet architecture and network coding.