| Presentation | 2023-10-19 [Poster Presentation] Influence of Obstructing Objects in Propagation Channel of Lighting Equipment Wireless Control Systems Keito Kimata, Hisato Iwai, Shinsuke Ibi, Masashi Motomura, Kei Kameda, Shigeo Gotoh, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In recent years, with the spread of the IoT (Internet of Things), wireless communication systems to enable efficient control of lighting equipment in large spaces such as offices have been developed. When using wireless communications for lighting equipment control in real environments, it is common obstacles such as desks and furniture are present between or near the propagation paths, potentially affecting the propagation characteristics between the equipment. In such environments, manufacturers of the equipment define the minimum distance between the paths and the obstacles. In order to relax these distance restrictions, it is important to grasp the effect of obstacles on the propagation characteristics between transmitting and receiving points on the ceiling. Considering the situation, this study aims to construct an estimation formula for propagation loss in cases where obstacles are present between lighting equipment installed on ceiling. The assumed frequency band is 920MHz, which is commonly used for such applications with specified low power radio systems. In this paper, as a preliminary step to construct the estimation formula, the propagation loss characteristics in such environments were evaluated through FDTD (Finite Difference Time Domain) analysis. We investigated the effect of obstacle width and height variations on the propagation loss. As a result, we confirmed that changes in obstacle sizes not only affect the direct wave but also the floor reflection wave. In other words, changes in the blocked area of obstacle within the first Fresnel zone in the floor reflection wave also affect the propagation loss. This result reveals that changes in the ratio of the blocked area within the first Fresnel zone lead to variations in the intensity of these waves. It is also shown that the obstacle sizes are candidates for important parameters in the estimation formula. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Lighting equipment communication / Propagation characteristics / FDTD / Estimation formula |
| Paper # | AP2023-109 |
| Date of Issue | 2023-10-12 (AP) |
| Conference Information | |
| Committee | AP |
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| Conference Date | 2023/10/19(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Iwate University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Student Session, Antennas and Propagation |
| Chair | Kunio Sakakibara(Nagoya Inst. of Tech.) |
| Vice Chair | YUAN Qiaowei(Tohoku Inst. of Tech.) |
| Secretary | YUAN Qiaowei(Iwate Univ.) |
| Assistant | Tomoki Murakami(NTT) |
| Paper Information | |
| Registration To | 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) | [Poster Presentation] Influence of Obstructing Objects in Propagation Channel of Lighting Equipment Wireless Control Systems |
| Sub Title (in English) | |
| Keyword(1) | Lighting equipment communication |
| Keyword(2) | Propagation characteristics |
| Keyword(3) | FDTD |
| Keyword(4) | Estimation formula |
| 1st Author's Name | Keito Kimata |
| 1st Author's Affiliation | Doshisha University(Doshisha Univ.) |
| 2nd Author's Name | Hisato Iwai |
| 2nd Author's Affiliation | Doshisha University(Doshisha Univ.) |
| 3rd Author's Name | Shinsuke Ibi |
| 3rd Author's Affiliation | Doshisha University(Doshisha Univ.) |
| 4th Author's Name | Masashi Motomura |
| 4th Author's Affiliation | Panasonic Corporation(Panasonic) |
| 5th Author's Name | Kei Kameda |
| 5th Author's Affiliation | Panasonic Corporation(Panasonic) |
| 6th Author's Name | Shigeo Gotoh |
| 6th Author's Affiliation | Panasonic Corporation(Panasonic) |
| Date | 2023-10-19 |
| Paper # | AP2023-109 |
| Volume (vol) | vol.123 |
| Number (no) | AP-223 |
| Page | pp.pp.79-80(AP), |
| #Pages | 2 |
| Date of Issue | 2023-10-12 (AP) |