| Presentation | 2022-07-15 Packet-level Index Modulation under Duty Cycle constraints Ryogo Oya, Shinichiro Kakuda, 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) | Low power wide area (LPWA) is an important technology in the field of the Internet of Things (IoT) because of its low cost and long-distance transmission capability. In LPWA, including LoRa, which is one of its standards, the transmission time per channel is limited by the duty cycle (DC) at each terminal. Therefore, packet-level index modulation (PLIM) has been proposed to increase the number of bits that can be transmitted by mapping information bits on the time and frequency axes in LoRa transmission. However, when the transmitted bit sequence is biased, the system may concentrate on a particular frequency channels, making the transmission impossible on the channel due to the DC requirements. To avoid the intensive use of certain channels in PLIM, we propose a method of adaptively exchanging indexes on the frequency axis. The index exchange decision is made at regular intervals, in which each LoRa terminal predicts the transmitted duration ratio for each channel based on the transmission channel history up to the time of exchange judgement. Then, when the difference between the maximum and minimum predicted time duration exceeds the threshold value, each LoRa terminal exchanges indexes among the two channels. The simulation results show that the proposed method can avoid the intensive use of specific channels and reduce the transmission limitations due to DC constraints. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | LPWA / LoRa / Index Modulation / Duty Cycle |
| Paper # | SR2022-44 |
| Date of Issue | 2022-07-06 (SR) |
| Conference Information | |
| Committee | NS / SR / RCS / SeMI / RCC |
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| Conference Date | 2022/7/13(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | The Kanazawa Theatre + Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Distributed Wireless Network, M2M (Machine-to-Machine)，D2D (Device-to-Device)，IoT（Internet of Things）, etc |
| Chair | Tetsuya Oishi(NTT) / Suguru Kameda(Hiroshima Univ.) / Kenichi Higuchi(Tokyo Univ. of Science) / Koji Yamamoto(Kyoto Univ.) / Shunichi Azuma(Nagoya Univ.) |
| Vice Chair | Takumi Miyoshi(Shibaura Insti of Tech.) / Osamu Takyu(Shinshu Univ.) / Kentaro Ishidu(NICT) / Kazuto Yano(ATR) / Tomoya Tandai(Toshiba) / Fumihide Kojima(NICT) / Osamu Muta(Kyushu Univ.) / Kazuya Monden(Hitachi) / Yasunori Owada(NICT) / Shunsuke Saruwatari(Osaka Univ.) / Shunichi Azuma(Hokkaido Univ.) / Koji Ishii(Kagawa Univ.) |
| Secretary | Takumi Miyoshi(NTT) / Osamu Takyu(Kogakuin Univ.) / Kentaro Ishidu(Mie Univ.) / Kazuto Yano(Tokai Univ.) / Tomoya Tandai(NTT) / Fumihide Kojima(Panasonic) / Osamu Muta(Univ. of Electro-Comm) / Kazuya Monden(Sharp) / Yasunori Owada(NTT DOCOMO) / Shunsuke Saruwatari(Tokyo Univ. of Agri. and Tech.) / Shunichi Azuma(Osaka Univ.) / Koji Ishii(CRIEPI) |
| Assistant | Kotaro Mihara(NTT) / Taichi Ohtsuji(NEC) / WANG Xiaoyan(Ibaraki Univ.) / Akemi Tanaka(MathWorks) / Katsuya Suto(Univ. of Electro-Comm) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) / Issei Kanno(KDDI Research) / Yuyuan Chang(Tokyo Inst. of Tech) / Yuki Matsuda(NAIST) / Akihito Taya(Aoyama Gakuin Univ.) / Takeshi Hirai(Osaka Univ.) / SHAN LIN(NICT) / Ryosuke Adachi(Yamaguchi Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Network Systems / Technical Committee on Smart Radio / Technical Committee on Radio Communication Systems / Technical Committee on Sensor Network and Mobile Intelligence / Technical Committee on Reliable Communication and Control |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Packet-level Index Modulation under Duty Cycle constraints |
| Sub Title (in English) | |
| Keyword(1) | LPWA |
| Keyword(2) | LoRa |
| Keyword(3) | Index Modulation |
| Keyword(4) | Duty Cycle |
| 1st Author's Name | Ryogo Oya |
| 1st Author's Affiliation | The University of Electro-Communications(UEC) |
| 2nd Author's Name | Shinichiro Kakuda |
| 2nd Author's Affiliation | The University of Electro-Communications(UEC) |
| 3rd Author's Name | Takeo Fujii |
| 3rd Author's Affiliation | The University of Electro-Communications(UEC) |
| 4th Author's Name | Osamu Takyu |
| 4th Author's Affiliation | Shinshu University(Shinshu Univ.) |
| 5th Author's Name | Mai Ohta |
| 5th Author's Affiliation | Fukuoka Univ.(Fukuoka Univ.) |
| 6th Author's Name | Koichi Adachi |
| 6th Author's Affiliation | The University of Electro-Communications(UEC) |
| Date | 2022-07-15 |
| Paper # | SR2022-44 |
| Volume (vol) | vol.122 |
| Number (no) | SR-107 |
| Page | pp.pp.110-115(SR), |
| #Pages | 6 |
| Date of Issue | 2022-07-06 (SR) |