| Presentation | 2019-01-24 Metric-Combining Multiuser Detection with RTS and eCTS for Ultra Reliable and Low Latency Wireless Communications Hideya So, Hayato Soya, Kazuhiko Fukawa, Yuyuan Chang, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This report proposes the multiuser detection (MUD) employing RTS and enhanced CTS (eCTS) for Internet of Things (IoT) services of which transmission delay time is strictly limited. Unlicensed band wireless communications employing CSMA/CA suffer from longer transmission delay time as the number of user terminals (UTs) increases, because packet collisions are more likely to occur. As a conventional scheme to separate collided packets, the metric-combining MUD (MC-MUD) has been proposed in OFDMA systems. MC-MUD calculates the metric for packets, which is defined as the squared Euclid distance between the received signal and its replica. Upon the basis of the maximum likelihood detection, MC-MUD combines the metric of a retransmitted packet with that of a previously transmitted packet. However, the corresponding UTs should simultaneously retransmit the same packets, so as to reduce computational complexity of MC-MUD. Since UTs are not centrally controlled, such a packet collision is not likely to occur. In order to cope with this problem, the report proposes a transmission scheme to realize the same packet collision for MC-MUD. In the proposed scheme, one UT that suffers from the packet collision transmits RTS before the retransmission. Then, the corresponding access point (AP) transmits eCTS including the addresses of the other UTs, which have experienced the same packet collision. The other UTs, which receive the eCTS, transmit the same packets immediately in order to achieve the same packet collision again. Computer simulations evaluate a CNR range under which the proposed scheme is effective, and transmission delay time of the proposed scheme. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | IoT / Wireless communications / CSMA/CA / Multiuser detection / Packet combining / RTS / eCTS |
| Paper # | SR2018-98 |
| Date of Issue | 2019-01-17 (SR) |
| Conference Information | |
| Committee | SR |
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| Conference Date | 2019/1/24(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Corasse, Fukushima city (Fukushima prefecture) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | cognitive radio, machine learning application, heterogeneous network, SDN, IoT etc. |
| 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) | Metric-Combining Multiuser Detection with RTS and eCTS for Ultra Reliable and Low Latency Wireless Communications |
| Sub Title (in English) | |
| Keyword(1) | IoT |
| Keyword(2) | Wireless communications |
| Keyword(3) | CSMA/CA |
| Keyword(4) | Multiuser detection |
| Keyword(5) | Packet combining |
| Keyword(6) | RTS |
| Keyword(7) | eCTS |
| 1st Author's Name | Hideya So |
| 1st Author's Affiliation | Tokyo Institute of Technology(TITECH) |
| 2nd Author's Name | Hayato Soya |
| 2nd Author's Affiliation | neko 9 Laboratories(neko 9 Lab.) |
| 3rd Author's Name | Kazuhiko Fukawa |
| 3rd Author's Affiliation | Tokyo Institute of Technology(TITECH) |
| 4th Author's Name | Yuyuan Chang |
| 4th Author's Affiliation | Tokyo Institute of Technology(TITECH) |
| Date | 2019-01-24 |
| Paper # | SR2018-98 |
| Volume (vol) | vol.118 |
| Number (no) | SR-421 |
| Page | pp.pp.5-12(SR), |
| #Pages | 8 |
| Date of Issue | 2019-01-17 (SR) |