| Presentation | 2014-07-29 3D-MDT : What floor was the measurement made in Minimization of Drive Tests? Haruki Izumikawa, Yuki Hirota, Daisuke Kamisaka, Chihiro Ono, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | For determining cellular coverage problems efficiently, some studies including MDT (Minimization of Drive-Tests) in 3GPP have been considering an approach whereby server of a cellular operator collects coverage information such as signal strength with location information from mobile terminals. The operator intends to rectify the problems based on the collected data, which indicates that the location information with the coverage information is of utmost importance. In addition to the 2-dimensional location information, i.e., latitude and longitude, height information (especially the floor level) is useful to the operator when taking measures. Although the GPS provides the altitude information, it could be difficult to estimate the floor level, i.e., height above ground level since the altitude information is the height above the sea level. Thus, we propose a method to estimate floor level where the coverage information is obtained for a mobile terminal equipped with a barometric pressure sensor. The mobile terminal sends the coverage information that also includes measured pressures to the server. The proposed method that works on the server estimates a floor level using the observed pressure based on the base-pressure that is the pressure at ground height. The base-pressure is estimated with respect to each spatial and time range from collected pressures. We also conducted a field trial in two areas in Tokyo by developing a logger application that records coverage information, location information and pressure on an Android smartphone, and implementing the proposed method in a server. Through the field trial, we found that the proposed method is able to estimate floor levels with a margin of error of two or three floors. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Localization / positioning / MDT (Minimization of Drive-Tests) / Floor / Barometric pressure sensor |
| Paper # | MoNA2014-18 |
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| Conference Information | |
| Committee | MoNA |
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| Conference Date | 2014/7/22(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Mobile Network and Applications(MoNA) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | 3D-MDT : What floor was the measurement made in Minimization of Drive Tests? |
| Sub Title (in English) | |
| Keyword(1) | Localization |
| Keyword(2) | positioning |
| Keyword(3) | MDT (Minimization of Drive-Tests) |
| Keyword(4) | Floor |
| Keyword(5) | Barometric pressure sensor |
| 1st Author's Name | Haruki Izumikawa |
| 1st Author's Affiliation | KDDI R&D Laboratories, Inc.() |
| 2nd Author's Name | Yuki Hirota |
| 2nd Author's Affiliation | KDDI R&D Laboratories, Inc. |
| 3rd Author's Name | Daisuke Kamisaka |
| 3rd Author's Affiliation | KDDI R&D Laboratories, Inc. |
| 4th Author's Name | Chihiro Ono |
| 4th Author's Affiliation | KDDI R&D Laboratories, Inc. |
| Date | 2014-07-29 |
| Paper # | MoNA2014-18 |
| Volume (vol) | vol.114 |
| Number (no) | 160 |
| Page | pp.pp.- |
| #Pages | 6 |
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