题 目: Rendezvous for Dynamic Spectrum Access
主 讲: 辛春生 教授 美国欧道明大学，通讯网络与信息安全创新实验室主任
Abstract: Driven by the phenomenal growth of mobile devices and services, the mobile industry is facing the “1000x” challenge – increase the wireless network capacity by 1000 times. To meet this formidable challenge, it is critical to unleash more radio spectrum for mobile broadband services through dynamic spectrum access. With dynamic spectrum access, secondary users are able to dynamically detect and access the vast amount of underutilized licensed spectrum. Nevertheless, the dynamic availability of communication channels forces secondary users to dynamically change their operational channels. Hence, the rendezvous between a transmitter secondary user and a receiver secondary user, i.e., how the transmitter finds the current channel of the receiver, is a key challenge for dynamic spectrum access networks. This talk first introduces the main algorithms in the literature for rendezvous in dynamic spectrum access networks, and discuss their pros and cons. Then, our work on rendezvous is presented. Our rendezvous algorithm seeks 1) maximizing network throughput by distributing nodes into disparate channels, 2) minimizing rendezvous time given near-optimal throughput, and 3) no coordination between nodes before rendezvous. The performance of our algorithm is analyzed and evaluated comparatively with a well known algorithm in the literature.
Biography: Chunsheng Xin is currently an Associate Professor in the Department of Electrical and Computer Engineering, Old Dominion University, Virginia, USA. He received his Ph.D. in Computer Science and Engineering from the State University of New York at Buffalo in 2002. His interests include wireless communications and networking, cybersecurity, cyber-physical systems and wearable computing. His research is supported by multiple NSF/NSA/NIST grants, and results in numerous papers in leading journals and conferences, such as IEEE JSAC, ToN, TWC, and Infocom, as well as several book chapters and one patent. He has received the Best Paper Awards of IEEE Globecom’13 and ICCCN’14. He has served as Co-Editor-in-chief of international journal, and external consultant on cybersecurity for industry. He has also served as the symposium co-chair of Globecom’15 and ICCCN’15.