报告题目：Surviving Screen-off Battery through Out-of-band Wi-Fi Coordination
Abstract：This paper focuses on a new power saving strategy for screen-off Wi-Fi communications. The key problem is how to coordinate client without incurring extra traffic overheads. To handle the problem, we propose a novel paradigm, Out-of-Band
Communication (OBC), for client-to-client direct communications. OBC exploits the TIM (Traffic Indication Map) field of Wi-Fi Beacons to build free side-channel between clients. It is based upon the observation that a client may control 1-->0 appearing on TIM bit by locally regulating packet receiving operations. We adopt this 1-->0 as the basic signal, and leverage the time length in between two signals to encode information. We demonstrate that OBC can be used to convey coordination information with close to 100% accuracy.
Bio：Dr. Tao Gu is currently an Associate Professor in Computer Science at RMIT University, Australia. He received his Bachelor degree from Huazhong University of Science and Technology, M.Sc. from Nanyang Technological University, Singapore, and Ph.D. in computer science from National University of Singapore. His current research interests include mobile computing, ubiquitous/pervasive computing, wireless sensor networks, distributed network systems, sensor data analytics, cyber physical system, Internet of Things, and online social networks. His publications appear in top journals such as JSAC, ToN, TMC, TC, TPDS, TWC and TKDE, and top conferences such as INFOCOM, UbiComp, ICNP, PerCom, and ICDM. He serves as TPC members for many leading conferences including INFOCOM, UbiComp, PerCom, and Journal editorial board members including IEEE Transactions on Mobile Computing (TMC), Elsevier Journal of Pervasive and Mobile Computing (PMC), and etc. He is a Senior Member of IEEE and a member of ACM.