[B-3] Satellite Communications | IEICE Society Conference 2025

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一般セッションB. Communications Society : B-3．Satellite Communications

[B-3]Satellite Communications

Wed. Sep 10, 2025 9:30 AM - 12:15 PM JST
Wed. Sep 10, 2025 12:30 AM - 3:15 AM UTC

School of Engineering Building No.1 2F Lecture Room No.3(Okayama University)

Chair:YOUJI KISHI(KDDI Research， Inc.), Nagareda Riichiro(KDDI Research， Inc.)

9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)

[B-3-09]Early Commercialization and System Evolution for HAPS Direct-to-Mobile-Phone Service - Inverse TDD Synchronization Method for Reducing Interference in Adjacent HAPS Service Links -

〇Yuki Hokazono¹, Hirofumi Nakajo¹, Atsunori Shimamura¹, Kenji Fukasawa¹, Yuto Muroki², Munehiro Matsui³, Hisayoshi Kano³ (1. NTT DOCOMO, INC., 2. Space Compass Corporation, 3. NTT, Inc.)

9:45 AM - 10:00 AM JST(12:45 AM - 1:00 AM UTC)

[B-3-10]HAPSを介した携帯電話向け直接通信システムの早期実用化と高速大容量化技術の研究開発-HAPSシステム間における干渉低減のためのTDD反転同期方式の性能評価-

〇Hirofumi Nakajo¹, Yuki Hokazono¹, Atsunori Shimamura¹, Megumi Oozono¹, Kenji Fukasawa¹, Yuto Muroki², Munehiro Matsui³, Hisayoshi Kano³ (1. NTT DOCOMO, INC., 2. Space Compass Corporation, 3. NTT, Inc.)

10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)

[B-3-11]Early Commercialization and System Evolution for HAPS Direct-to-Mobile-Phone Service- Evaluation of Frequency Reuse Factor using System Level Simulator -

〇Atsunori Shimamura¹, Yuki Itabashi¹, Tomohiro Matsuyama¹, Yuki Hokazono¹, Daisuke Kurita¹, Hirofumi Nakajo¹, Megumi Oozono¹, Kenji Fukasawa¹, Yuto Muroki², Yoshihisa Kishiyama² (1. NTT DOCOMO, INC., 2. Space Compass Corporation)

10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)

[B-3-12]Early Commercialization and System Evolution for HAPS Direct-to-Mobile-Phone Service - Evaluation of Region-specific Inter-System Interference in HAPS using Frequency Reuse Scheme -

〇Yuki Itabashi¹, Yuki Hokazono¹, Daisuke Kurita¹, Atsunori Shimamura¹, Megumi Oozono¹, Hirohumi Nakajo¹, Tomohiro Matsuyama¹, Kenji Fukasawa¹, Yuto Muroki², Yoshihisa Kishiyama² (1. NTT DOCOMO, INC., 2. Space Compass Corporation)

10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)

[B-3-13]Early Commercialization and System Evolution for HAPS Direct-to-Mobile-Phone Service - Performance Evaluation of Multi-Element Antenna MIMO Technology in Service Links -

〇Tomohiro Matsuyama¹, Yuki Itabashi¹, Yuki Hokazono¹, Daisuke Kurita¹, Atsunori Shimamura¹, Megumi Oozono¹, Hirofumi Nakajo¹, Kenji Fukasawa¹, Yuto Muroki², Yoshihisa Kishiyama² (1. NTT DOCOMO, INC., 2. Space Compass Corporation)

10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

Break time

11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)

[B-3-14]Early Commercialization and System Evolution for HAPS Direct-to-Mobile-Phone Service - Stratospheric Communication Field Trial Using a Fixed-Wing HAPS in Kenya and Link Budget Evaluation -

〇Yuto Muroki¹, Yoshihisa Kishiyama¹, Sunao Toya¹, Takuya Miyashita¹, Kosuke Hirama¹, Yuki Hokazono², Kenji Fukasawa² (1. Space Compass Corporation, 2. NTT DOCOMO, INC.)

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[B-3-15]Early Commercialization and System Evolution for HAPS Direct-to-Mobile-Phone Service - UE Connection control considering service type -

〇Munehiro Matsui¹, Hisayoshi Kano¹, Tomohiro Tokuyasu¹, Yuki Hokazono², Kenji Fukasawa², Fumihiro Yamashita¹ (1. NTT, Inc., 2. NTT DOCOMO, INC.)

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

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