Department of Electronic and Computer Engineering Seminar - Short Packet Communication for Real-Time 5G/6G Applications
The emerging 5G and 6G networks feature a wide range of real-time applications, such as vehicular communication and industrial metaverse. Short packet communication plays an important role in the real-time applications, where many data in exchange are of limited size. While favoring low latency, short packet communication strikes significant challenges in maintaining ultra high reliability required by real-time 5G/6G applications. In this lecture, a number of recent research developments on short packet communication are presented.
First, high-reliability receiver design in a semi-blind manner is presented for two short packet communication systems under strong interference. For a downlink non-orthogonal multiple access (NOMA) system under inter-user interference, a receiver structure based on independent component analysis is presented, which achieves a robust and near-optimal performance without successive interference cancelation required. For a high mobility multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system under strong inter-carrier interference, a hierarchical basis expansion model based channel estimation scheme is proposed, which achieves a significant reduction in pilot overhead and computational complexity.
Second, dynamic resource allocation is presented to enhance the performance of short packet communication. Joint adaptation of block length, pilot length and pilot power is conducted to enhance the throughput, latency and reliability performances of short packet communication, and the tradeoff between them is also investigated. Furthermore, joint allocation of block length, subchannels and transmission power is presented for a cellular vehicle-to-everything (V2X) based platoon system, with the assistance of dynamic manager selection. A near-optimal performance in terms of groupcast latency and a significant complexity reduction over exhaustive search are achieved.
Last but not least, age of information (AoI) oriented short packet communication is presented for the co-design of coupled systems, where AoI serves as a measure of information freshness and reflects both latency and reliability. Status prediction and proactive transmission termination in case of prediction error is employed for the co-design of sensing and communication and shown to outperform the no prediction case in terms of AoI, even under a prediction error probability of 50%. Furthermore, the closed-loop AoI for wireless networked control systems, referred to as age of loop (AoL), is introduced with a comprehensive performance analysis for the co-design of communication and control, and shown to enable an 8-fold reduction in control cost.
Xu (Judy) Zhu received the BEng degree in Electronics and Information Engineering from Huazhong University of Science and Technology, Wuhan, China, and the PhD degree in Electrical and Electronic Engineering from the Hong Kong University of Science and Technology, Hong Kong, China. She was a Reader of the Department of Electrical Engineering and Electronics, the University of Liverpool, Liverpool, UK. She is currently a Professor of the School of Electronic and Information Engineering, Harbin Institute of Technology, Shenzhen, China. Her research interests include MIMO, channel estimation and equalization, ultra reliable low latency communication, full duplex communication, cooperative communication, green communication, etc. She has co-authored 2 books and more than 240 technical papers, and received a Best Paper Award of IEEE Globecom 2019. She is a Distinguished Lecturer of the IEEE Vehicular Technology Society. She has served as an Editor for the IEEE Transactions on Wireless Communications and a Guest Editor for several international journals such as Electronics. She has acted as a chair for various international conferences, including Program Chair of ICSAI 2012, Symposium Co-Chair of IEEE ICC 2016, ICC 2019 and Globecom 2021, Track Co-Chair of IEEE WCNC 2022, etc.