| Presentation | 2021-10-21 Initial access beam search method with variable beam width according to the area size Takuto Arai, Tatsuhiko Iwakuni, Syuki Wai, Daisei Uchida, Naoki Kita, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | High gain antennas using narrow-beamforming are required to compensate for high propagation loss in high frequency bands such as millimeter wave and sub-terahertz , which are promising bands to be used for extreme high-speed and high-capacity. When the narrow-beamforming is used for initial access beam searching over all directions, the overhead needed for the beam searching is large. On the other hand, when the wide-beamforming is used to reduce the overhead for the initial access, the coverage area shrinks due to beamforming gain lowering. In this paper, we propose a newly initial access beam search scheme with variable beam width based on the distance to shadowing obstacles for each direction. Our simulation evaluations show that the proposed method can reduce the overhead without shrinking the coverage area in shadowing environments compared with the narrow-beamforming over all directions. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Beam search / Initial access / High frequency band / Overhead reduction |
| Paper # | RCS2021-122 |
| Date of Issue | 2021-10-14 (RCS) |
| Conference Information | |
| Committee | RCS |
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| Conference Date | 2021/10/21(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Wireless Communication Schemes, Wireless Communication Systems, Wireless Standards, Future Wireless Systems, etc. |
| Chair | Eiji Okamoto(Nagoya Inst. of Tech.) |
| Vice Chair | Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) / Fumihide Kojima(NICT) |
| Secretary | Toshihiko Nishimura(NEC) / Tomoya Tandai(Panasonic) / Fumihide Kojima |
| Assistant | Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Initial access beam search method with variable beam width according to the area size |
| Sub Title (in English) | |
| Keyword(1) | Beam search |
| Keyword(2) | Initial access |
| Keyword(3) | High frequency band |
| Keyword(4) | Overhead reduction |
| 1st Author's Name | Takuto Arai |
| 1st Author's Affiliation | NTT Corporation(NTT) |
| 2nd Author's Name | Tatsuhiko Iwakuni |
| 2nd Author's Affiliation | NTT Corporation(NTT) |
| 3rd Author's Name | Syuki Wai |
| 3rd Author's Affiliation | NTT Corporation(NTT) |
| 4th Author's Name | Daisei Uchida |
| 4th Author's Affiliation | NTT Corporation(NTT) |
| 5th Author's Name | Naoki Kita |
| 5th Author's Affiliation | NTT Corporation(NTT) |
| Date | 2021-10-21 |
| Paper # | RCS2021-122 |
| Volume (vol) | vol.121 |
| Number (no) | RCS-210 |
| Page | pp.pp.25-30(RCS), |
| #Pages | 6 |
| Date of Issue | 2021-10-14 (RCS) |