| Presentation | 2019-09-06 Geolocation and Time Synchronization System for IoT Effectively Utilizing the VHF band Takafumi Morita, Akihiro Nakao, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In Internet of Things (IoT), a huge number of sensors are connected to the network and transmit data constantly. Time and location are important for the measurement data. In addition, the protocols for efficient utilization of radio frequencies are being developed recently by optimizing data transmission timing on a large scale using time synchronization. Thus, time synchronization and geolocation with marginal power consumption are the fundamental and most important technologies for remote sensing. The conventional technologies including GPS in the outdoors and WiFi positioning achieve these goals to a limited extent, but there are few methods that can be used both indoors and outdoors in a wide area. In this study, we propose the use of GPS protocol in the VHF band in order to establish time synchronization and positioning system for IoT. Using Software Defined Radio (SDR), the GPS signals with center frequency at L1 band (1.57542GHz) are down-converted to the VHF band. We posit that our proposed positioning system is available both indoors and outdoors in a wide area. This paper reports our preliminary evaluation of the prototype system and conducts a feasibility study of the future system. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | IoT broadcast system / Time Synchronization / Geolocation / GPS / Software Defined Radio |
| Paper # | NS2019-97 |
| Date of Issue | 2019-08-29 (NS) |
| Conference Information | |
| Committee | NS / IN / CS |
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| Conference Date | 2019/9/5(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Research Institute of Electrical Communication, Tohoku Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Session management (SIP/IMS), Interoperability/Standardization, NGN/NwGN/Future networks, Cloud/Data center networks, SDN (OpenFlow, etc.)/NFV, IPv6, Machine learning, etc. |
| Chair | Yoshikatsu Okazaki(NTT) / Takuji Kishida(NTT-AT) / Hidenori Nakazato(Waseda Univ.) |
| Vice Chair | Akihiro Nakao(Univ. of Tokyo) / Kenji Ishida(Hiroshima City Univ.) / Jun Terada(NTT) |
| Secretary | Akihiro Nakao(Osaka Pref Univ.) / Kenji Ishida(NTT) / Jun Terada(NTT Communications) |
| Assistant | Shinya Kawano(NTT) / / Kazutaka Hara(NTT) / Hiroyuki Saito(OKI) |
| Paper Information | |
| Registration To | Technical Committee on Network Systems / Technical Committee on Information Networks / Technical Committee on Communication Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Geolocation and Time Synchronization System for IoT Effectively Utilizing the VHF band |
| Sub Title (in English) | |
| Keyword(1) | IoT broadcast system |
| Keyword(2) | Time Synchronization |
| Keyword(3) | Geolocation |
| Keyword(4) | GPS |
| Keyword(5) | Software Defined Radio |
| 1st Author's Name | Takafumi Morita |
| 1st Author's Affiliation | The University of Tokyo(UTokyo) |
| 2nd Author's Name | Akihiro Nakao |
| 2nd Author's Affiliation | The University of Tokyo(UTokyo) |
| Date | 2019-09-06 |
| Paper # | NS2019-97 |
| Volume (vol) | vol.119 |
| Number (no) | NS-194 |
| Page | pp.pp.47-52(NS), |
| #Pages | 6 |
| Date of Issue | 2019-08-29 (NS) |