In our modern society, information and communication networks have become indispensable as a basic infrastructure that supports people’s lives and economic activities. These networks, which also include the Internet, are used in various fields, such as online meetings, cloud computing, and remote medical care, and cause a major impact on the way we live. In the future, we expect that the configuration and operation of networks will become even more advanced as next-generation communication technologies become more widespread. Within this context, our research laboratory aims to realize high-performance and highly reliable communication, focusing on theoretical approaches for the design and implementation of network protocols. Through mathematical models and computer simulations, we logically analyze problems in real communication environments and propose corresponding solutions. With our research projects, we aim to contribute to solving social issues, such as building a resilient communication infrastructure that can handle disaster events and realizing a green network that takes energy efficiency into consideration. Our goal is not just achieving technological innovation, but also playing an important role in realizing a sustainable society.