2023-06-18
浏览次数：524Title: Random Access for Machine-to-Machine Communications: Connection-based or Connection-free?
Prof. Lin Dai (代琳)
Professor, Department of Electrical Engineering
Director (GEO), Global Engagement Office
City University of Hong Kong, Hong Kong, China
Abstract: With the new wave of digital revolution, wireless communication networks are experiencing a radical paradigm shift from the conventional human-to-human (H2H) communications to machine-to-machine (M2M) communications. To facilitate the massive access of machine-type devices, random access is expected to play a crucial role in the next-generation M2M communications. Thanks to its distributed nature, random access has found wide applications to various wireless networks including 5G cellular networks and WiFi networks.In general, random access protocols can be divided into two categories: connection-based or connection-free. The connection-based random access procedure of cellular networks has been long criticized for its low access efficiency for supporting M2M communications, which is mainly attributed to the large overhead of connection establishment. Yet connection-free random access schemes usually suffer from high transmission failure rates, especially in massive access scenarios. The optimal access design for M2M communications requires a fundamental understanding of the performance limits of connection-based and connection-free random access, which will be the focus of this talk. Specifically, I will introduce our recently proposed unified analytical framework for random access, and show how to characterize the maximum effective throughput of connection-based and connection-free random access to develop criteria for beneficial connection establishment. I will conclude the talk by highlighting the practical implications of the analysis to the access design of M2M communications.
Biography: Lin Dai received the Ph.D. degree from Tsinghua University, China. She is now a full professor of Department of Electrical Engineering of City University of Hong Kong. She has broad interests in communications and networking theory, with special interests in wireless communications. Her recent research work focuses on the theory and applications of random access for next-generation mobile communication systems. She was a co-recipient of the Best Paper Award at the IEEE WCNC 2007 and the IEEE Marconi Prize Paper Award in 2009. She received The President's Award of City University of Hong Kong in 2017.
2023年6月21日（周三）15:30-16:00
逸夫人文馆报告厅, 华南理工大学五山校区
欢迎广大师生参加！