Tohoku University Technology: Codebook generator, generation method, control method and program: T21-262
Possible to control IRS without CSI
IRS (Intelligent Reflecting Surface) is known as a means to improve network performance. IRS is a device with integrated metamaterial element. Electromagnetic wave incident on the device can be reflected in any direction by controlling metamaterial element. Normally, CSI (Channel State Information) is required to control IRS. However, IRS is a passive device and cannot send nor receive information. Therefore, a device to collect CSI must be installed separately from IRS and connected to IRS, which requires cost and technical burden. This invention is able to provide a controller that can control IRS without the need of CSI. This invention has a control pattern selection unit that determines a control pattern corresponding to representative value that is in the same cluster as reference value based on reflection target and codebook that show correspondence between representative value and IRS control pattern, and a control unit that controls IRS based on pattern. The codebook classifies reference value into cluster, generates representative value in each cluster, and generates control pattern corresponding to the representative value.
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The revenue generated from technology transfer is reinvested into universities and researchers as new research funding, which is used to create further research outcomes. To ensure the smooth operation of this cycle, known as the "Intellectual Creation Cycle," we will actively promote technology transfer. The types of seeds we handle include patents, know-how, databases, and programs. We have established a collaborative framework by concluding basic technology transfer agreements with the following universities (as of April 1, 2026): - Tohoku University - Hirosaki University - Iwate University - Akita University - Fukushima University - Yamagata University - Tohoku Gakuin University - Iwate Medical University - Fukushima Medical University - Aizu University - Miyagi University - Hokkaido University - Muroran Institute of Technology - Showa Medical University - Asahikawa Medical University
