From September 28 to October 8, 2026, a 5D Working Group meeting under the Fifth Research Group of the Radiocommunication Division of the International Telecommunication Union was held in Geneva, Switzerland. This conference is the 9th meeting of the 2027 World Radiocommunication Conference research cycle WP5D. The WP5D working group is mainly responsible for studying the technology, operation, and spectrum related work of the terrestrial part of international mobile communication systems. This conference focused on topics such as the new band division for IMT, the new band division for mobile phones directly connected to satellites, research on the submission process and template for future 6G wireless technology, etc., and focused on reviewing research results such as the draft report of the WRC-27 Preparatory Conference and the rules for interference protection of direct mobile phone satellite systems to IMT systems. The 2 CPM related papers submitted by China and 5 common frequency compatibility research papers were all accepted at the conference. More than 50 representatives from 12 organizations, including relevant departments of the State Council, research institutes, universities, and enterprises, attended the conference using a combination of online and offline methods.

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