| Presentation | 2020-11-27 Human Blockage Loss Characteristics of 5 GHz in A Crowded Stadium Motoharu Sasaki, Toshiro Nakahira, Keisuke Wakao, Takatsune Moriyama, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper reports on human body blockage loss characteristics based on measurement results under unoccupied and crowded conditions in a stadium environment. The measurements were taken at the Japan National Stadium, which will be used at the opening ceremonies of the Tokyo 2020 Olympics and Paralympics. We measured the received signal strength (RSSI) with smartphones (UEs) using the Wi-Fi signal from various access points (APs) laid inside the stadium for actual service. The measurement data were acquired at the opening event of the Japan National Stadium on December 21, 2019, and the measurements were performed both in the unoccupied environment before the event and in the crowded environment after the event started. We analyzed the human blockage loss characteristics by comparing the measurement data taken under the crowded and unoccupied conditions and clarified the location dependency and time variation characteristics of the human blockage loss in a crowded stadium. The results showed that while the location dependence of the human blockage loss does not depend on the distance between the APs and UEs, it does differ depending on the location, and follows a normal distribution with a median value of 7.2 dB and standard deviation of 5.5 dB. We also found that the time variation characteristics of human blockage loss follow a normal distribution with a standard deviation of 2.4 dB. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Human blockage / Stadium / Crowded environment / Wi-Fi / 5 GHz |
| Paper # | AP2020-94 |
| Date of Issue | 2020-11-18 (AP) |
| Conference Information | |
| Committee | RCS / AP |
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| Conference Date | 2020/11/25(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Adaptive Antenna, Equalization, Interference Canceler, MIMO, Wireless Communications, etc. |
| Chair | Eiji Okamoto(Nagoya Inst. of Tech.) / Qiang Chen(Tohoku Univ.) |
| Vice Chair | Fumiaki Maehara(Waseda Univ.) / Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) / Satoru Kurokawa(AIST) |
| Secretary | Fumiaki Maehara(Kyushu Univ.) / Toshihiko Nishimura(NEC) / Tomoya Tandai(Tokyo Univ. of Agric. & Tech.) / Satoru Kurokawa(NTT DOCOMO) |
| Assistant | Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) / Dr. Kim(Niigata Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems / Technical Committee on Antennas and Propagation |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Human Blockage Loss Characteristics of 5 GHz in A Crowded Stadium |
| Sub Title (in English) | |
| Keyword(1) | Human blockage |
| Keyword(2) | Stadium |
| Keyword(3) | Crowded environment |
| Keyword(4) | Wi-Fi |
| Keyword(5) | 5 GHz |
| 1st Author's Name | Motoharu Sasaki |
| 1st Author's Affiliation | NTT(NTT) |
| 2nd Author's Name | Toshiro Nakahira |
| 2nd Author's Affiliation | NTT(NTT) |
| 3rd Author's Name | Keisuke Wakao |
| 3rd Author's Affiliation | NTT(NTT) |
| 4th Author's Name | Takatsune Moriyama |
| 4th Author's Affiliation | NTT(NTT) |
| Date | 2020-11-27 |
| Paper # | AP2020-94 |
| Volume (vol) | vol.120 |
| Number (no) | AP-248 |
| Page | pp.pp.112-117(AP), |
| #Pages | 6 |
| Date of Issue | 2020-11-18 (AP) |