| Presentation | 2020-12-17 [Encouragement Talk] Massive Grant-Free Non-Orthogonal Multiple Access Utilizing Time and Frequency Spreading Takanori Hara, Koji Ishibashi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | To accommodate a large number of users efficiently, grant-free non-orthogonal multiple access (GF-NOMA) has gained much attention. Conventional schemes utilize the non-orthogonal sequences spread over the time domain and perform active user detection (AUD) and channel estimation (CE) via sparse recovery techniques exploiting multiple measurements. However, these approaches require a sufficiently long sequence to accommodate massive users efficiently, leading to difficulties in meeting the latency requirements. In this paper, we propose a new GF-NOMA making full use of time and frequency domains and its parameter design based on phase transition. We demonstrate that our proposed GF-NOMA outperforms the conventional one under the low-latency requirement via computer simulations. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Grant-free non-orthogonal multiple access / compressed sensing / phase transition / approximate message passing |
| Paper # | RCS2020-134 |
| Date of Issue | 2020-12-10 (RCS) |
| Conference Information | |
| Committee | NS / RCS |
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| Conference Date | 2020/12/17(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Multi-hop/Relay/Cooperation, Disaster-resistant wireless network, Sensor/Mesh network, Ad-hoc network, D2D/M2M, Wireless network coding, Handover/AP switching/Connected cell control/Load balancing among base stations/Mobile network dynamic reconfiguration, QoS/QoE assurance, Wireless VoIP, IoT, Edge computing, etc. |
| Chair | Akihiro Nakao(Univ. of Tokyo) / Eiji Okamoto(Nagoya Inst. of Tech.) |
| Vice Chair | Tetsuya Oishi(NTT) / Fumiaki Maehara(Waseda Univ.) / Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) |
| Secretary | Tetsuya Oishi(NTT) / Fumiaki Maehara(Chuo Univ.) / Toshihiko Nishimura(Kyushu Univ.) / Tomoya Tandai(NEC) |
| Assistant | Shinya Kawano(NTT) / Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) |
| Paper Information | |
| Registration To | Technical Committee on Network Systems / Technical Committee on Radio Communication Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Encouragement Talk] Massive Grant-Free Non-Orthogonal Multiple Access Utilizing Time and Frequency Spreading |
| Sub Title (in English) | |
| Keyword(1) | Grant-free non-orthogonal multiple access |
| Keyword(2) | compressed sensing |
| Keyword(3) | phase transition |
| Keyword(4) | approximate message passing |
| 1st Author's Name | Takanori Hara |
| 1st Author's Affiliation | The University of Electro-Communications(The Univ. of Electro-Communications) |
| 2nd Author's Name | Koji Ishibashi |
| 2nd Author's Affiliation | The University of Electro-Communications(The Univ. of Electro-Communications) |
| Date | 2020-12-17 |
| Paper # | RCS2020-134 |
| Volume (vol) | vol.120 |
| Number (no) | RCS-298 |
| Page | pp.pp.1-6(RCS), |
| #Pages | 6 |
| Date of Issue | 2020-12-10 (RCS) |