Mr. Kunihiko Teshima has been engaged in the standardization of radio resource management functions for fourth-generation (4G, LTE and LTE-Advanced) and fifth-generation (5G and NR) mobile communications systems at standardization organizations such as 3GPP (3rd Generation Partnership Project), which has been responsible for establishing global standard specifications for third and subsequent generations of cellular mobile phone systems. He has been making significant contributions to the evolution and practical application of 4G mobile communication systems, which have become an indispensable social infrastructure, and 5G mobile communication systems, which are expected to bring further benefits to industry.

In addition to presenting a number of technical proposals for standard specifications at 3GPP, Mr. Teshima has also invented technologies for standard-essential patents (SEPs). In particular, he has made remarkable contributions to introducing a technology called Dual Connectivity that enables the simultaneous use of multiple carriers from different base stations. This technology facilitates cell densification in high-traffic areas in LTE-Advanced and 5G networks as well as the development of high-performance mobile terminals.Furthermore, appointed as a coordinator (Rapporteur) for a 3GPP working group consisting of members from telecommunication operators and global vendors from around the world, he has played a leading role in successfully completing standard specifications that contribute to the improvement of the radio transmission and reception performance of mobile terminals in high-speed mobile environments such as on Shinkansen bullet trains.

Mr. Teshima has also served as co-chair and spec editor of a workgroup at the O-RAN ALLIANCE. His leadership has been particularly noteworthy in developing technical specifications to enable multi-vendor interoperability between CU (Central Unit) and DU (Distributed Unit) products and between DU and RU (Radio Unit) products sourced from different vendors and in defining test specifications to verify the conformance of products to O-RAN specifications and to prove interoperability between O-RAN products. Through such initiatives, he has made great contributions to the accelerated adoption of more open and intelligent radio access networks by industry.

As described above, Mr. Teshima has made extremely significant contributions to industry, playing a pivotal role in a series of standardization activities indispensable for the development and practical application of mobile phone systems. We look forward to his continued success in the future.