Clarifying the theoretical limits of communication speed and data compression ratio.
Information and Communication Technology (Saitama University Research Seed Collection 2025-27 p.86)
Keywords: Information communication, information theory, communication systems, communication speed, data compression.
Around us, various information and communication devices have become widely used, allowing communication to take place in different locations and situations. Additionally, as exemplified by communication using web conferencing systems, there are increasing opportunities for communication involving multiple senders and receivers, rather than just a single sender and receiver. In response to these diverse forms of communication, I am researching theoretical limits regarding how fast communication speeds can be achieved and how small the compression ratio of data compression used during this process can be made. So far, I have clarified the theoretical limits of communication under assumed real-world conditions, such as when senders communicate asynchronously or when auxiliary cache memory, which can store part of the communication data in advance, is available on the receiver's side. By elucidating these theoretical limits, we can establish benchmarks for developing communication systems that facilitate such communication and gain insights into communication methods that can achieve these theoretical limits.
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Tetsunao Matsuta, Associate Professor Graduate School of Science and Technology, Department of Mathematical and Electronic Information, Information Area 【Recent Research Topics】 ● Clarification of the minimum cost for data erasure ● Research on methods for concealing information retrieval ● Research on methods for estimating the source of rumors
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【Appeal Points to the Industry】 ●Advice on known theoretical limits and their analysis methods for various communication systems ●Proposals for new communication methods 【Examples of Practical Application, Use Cases, and Utilization】 ●Utilizing theoretical limits as indicators when developing communication systems ●Development of more efficient communication methods
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The Saitama University Open Innovation Center is a center that functions as a liaison office for industry-academia-government collaboration. It consists of three departments: the Industry-Academia-Government Collaboration Department, the Intellectual Property Department, and the Startup Support Department, each staffed with coordinators well-versed in various fields. The center's activities include solving technical challenges in companies, supporting the implementation of joint research, and conducting technology transfer aimed at introducing and utilizing Saitama University's intellectual property.