COMSYS TALK : " Information Theory for Interactive Cognition-based Semantic-aware Communications “

Yong Xiao, HUST -
Communication systems

Date: June 6th 2023
Location: Eurecom - Eurecom

Abstract: The recent iteration of wireless technology, the so-called 5G and beyond, promises to support a plethora of services enabled by carefully tailored network capabilities based on contents, requirements, as well as semantics. This sparkled significant interest in semantic communication, a novel paradigm that involves the meaning of message into communication. In this talk, I will first introduce our recent work on strategic semantic communication theory in which a transmitter obtains a limited number of indirect observations of an intrinsic semantic information source and can then influence the receiver’s decoding by sending a limited number of messages over an imperfect channel. We prove that committing to an encoding strategy cannot always bring benefit to the encoder. We provide a feasible condition under which committing to an encoding strategy can always reduce the distortion of semantic communications. The original definition of semantics as well as recent results in cognitive neuroscience suggest that it is the implicit semantic information, the hidden relations connecting different concepts and feature items that play the fundamental role in recognizing, communicating, and delivering the real semantic meanings of messages. Motivated by this observation, we propose a novel reasoning-based implicit semantic-aware communication network architecture that allows destination users to directly learn a reasoning mechanism that can automatically generate complex implicit semantic information based on a limited explicit information sent by the source users. Finally, we extend this architecture into multi-tier cloud/edge computing networks in which multiple tiers of cloud data center and edge servers can collaborate and support multi-layer semantic encoding, decoding, and implicit semantic interpretation for multiple end-users. Finally, I will discuss some key challenges and future directions. Bio: Yong Xiao is a professor in the School of Electronic Information and Communications at the Huazhong University of Science and Technology (HUST), Wuhan, China. He is also the associate group leader of the network intelligence group of IMT-2030 (6G promoting group) and the vice director of 5G Verticals Innovation Laboratory jointly founded by HUST, Ericsson, and China Mobile. Before he joins HUST, he was a research assistant professor in the Department of Electrical and Computer Engineering at the University of Arizona where he was also the center manager of the Broadband Wireless Access and Applications Center (BWAC), an NSF Industry/University Cooperative Research Center (I/UCRC) led by the University of Arizona. He has published more than 90 journal articles and peer-reviewed conference papers. He is the associate editor of IEEE Transactions on Mobile Computing. His research interests include semantic-aware networking, machine learning, game theory, distributed optimization, and their applications in next generation mobile systems.

Permalink: https://www.eurecom/seminar/117695