| Presentation | 2019-05-30 Spectrum Sharing exploiting Spectrum Database for LPWA Yudai Yamazaki, Takeo Fujii, Osamu Takyu, Mai Ohta, Koichi Adachi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In the most of current low power wide area (LPWA), packet collisions of uplink communication are controlled by setting duty cycle (DC), which controls the transmission cycle not to exceed the predefined fixed threshold. However, as the number of LPWA nodes increases, the fixed DC fatally increases the number of packet collisions and degrades the communication quality. Therefore, in this paper, we propose an adaptive DC decision algorithm. The proposed algorithm aims at adapting the period that the system interferes with others and reducing the packet loss rate of uplink communication of the whole system to below the required value by adapting DC with the help of measurement-based spectrum database (MSD). In the proposed method, MSD knows the number of LoRa nodes that interfere with the nodes of other systems. The DC is calculated for keeping the period of interference to less than a certain duration. In addition, the DC is also adapted based on the required packet loss rate to improve communication efficiency. Computer simulation results show that the allowable interference time ratio and the required packet loss rate can be accurately guaranteed compared to the conventional method with the fixed DC even if the number of nodes increases. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Spectrum Database / LPWA / Spectrum Sharing |
| Paper # | SR2019-10 |
| Date of Issue | 2019-05-23 (SR) |
| Conference Information | |
| Committee | SR |
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| Conference Date | 2019/5/30(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tokyo Big Sight |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Technical Exhibition, LPWA, General |
| Chair | Kenta Umebayashi(Tokyo Univ. of Agric. and Tech.) |
| Vice Chair | Masayuki Ariyoshi(NEC) / Suguru Kameda(Tohoku Univ.) |
| Secretary | Masayuki Ariyoshi(NICT) / Suguru Kameda(ATR) |
| Assistant | Gia Khanh Tran(Tokyo Inst. of Tech.) / Syusuke Narieda(Mie Univ.) / Koji Ohshima(Kozo Keikaku Engineering) / Mai Ohta(Fukuoka Univ.) / Teppei Oyama(Fujitsu Lab.) |
| Paper Information | |
| Registration To | Technical Committee on Smart Radio |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Spectrum Sharing exploiting Spectrum Database for LPWA |
| Sub Title (in English) | |
| Keyword(1) | Spectrum Database |
| Keyword(2) | LPWA |
| Keyword(3) | Spectrum Sharing |
| 1st Author's Name | Yudai Yamazaki |
| 1st Author's Affiliation | The University of Electro-Communications(UEC) |
| 2nd Author's Name | Takeo Fujii |
| 2nd Author's Affiliation | The University of Electro-Communications(UEC) |
| 3rd Author's Name | Osamu Takyu |
| 3rd Author's Affiliation | Shinshu University(Shinshu Univ.) |
| 4th Author's Name | Mai Ohta |
| 4th Author's Affiliation | Fukuoka University(Fukuoka Univ.) |
| 5th Author's Name | Koichi Adachi |
| 5th Author's Affiliation | The University of Electro-Communications(UEC) |
| Date | 2019-05-30 |
| Paper # | SR2019-10 |
| Volume (vol) | vol.119 |
| Number (no) | SR-62 |
| Page | pp.pp.63-68(SR), |
| #Pages | 6 |
| Date of Issue | 2019-05-23 (SR) |