Presentation 2019-01-25
Efficient Radio Access for Massive Machine-Type Communication
Hayato Tezuka, Masafumi Moriyama, Kenichi Takizawa, Fumihide Kojima,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) A rapid increase of uplink traffic is predicted with the spread of IoT devices. In the 5G (5th generation mobile communications systems), base stations must effectively receive massive uplink signals transmitted from IoT devices. In addition, there are some communications that require low latency like automatic operation, so low latency communication is also important. To solve this problem, we have developed techniques based on non-orthogonal multiple access in uplink (UL-NOMA) in order to realize both massive device connectivity and low latency. Although our system can accommodate many user terminals by sharing communication resources, in a fading environment, the separation success rate which indicates the signal separation ratio when SIC is employed relatively decreases because of received power fluctuation, hence we must evaluate the system under the fading environment so that system can be improved. In this paper, we evaluated our system in an outdoor environment as well as in a laboratory using a channel emulator. We compared the results of the two experiments. As a result, we found that the experiment in the outdoor environment was similar to Rician and Nakagami fading, and using space diversity (SD) and repetition transmission (RT) made the performance improve.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) IoT / Massive Devices / Contention Based Communication / Low Latency / Successive Interference Cancellation
Paper # RCC2018-111
Date of Issue 2019-01-18 (RCC)

Conference Information
Committee RCC
Conference Date 2019/1/25(1days)
Place (in Japanese) (See Japanese page)
Place (in English) Central Research Institute of Electric Power Industry (Otemachi)
Topics (in Japanese) (See Japanese page)
Topics (in English) Reliable Communication and Control, etc.
Chair Kazunori Hayashi(Osaka City Univ.)
Vice Chair Shunichi Azuma(Nagoya Univ.) / HUAN-BANG LI(NICT)
Secretary Shunichi Azuma(Kagawa Univ.) / HUAN-BANG LI(Osaka Univ.)
Assistant Toshinori Kagawa(NICT) / Masateru Ogura(NAIST)

Paper Information
Registration To Technical Committee on Reliable Communication and Control
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Efficient Radio Access for Massive Machine-Type Communication
Sub Title (in English) Evaluation of the effect of space diversity and repetition transmission in fading environment
Keyword(1) IoT
Keyword(2) Massive Devices
Keyword(3) Contention Based Communication
Keyword(4) Low Latency
Keyword(5) Successive Interference Cancellation
1st Author's Name Hayato Tezuka
1st Author's Affiliation National Institute of Information and Communications Technology(NICT)
2nd Author's Name Masafumi Moriyama
2nd Author's Affiliation National Institute of Information and Communications Technology(NICT)
3rd Author's Name Kenichi Takizawa
3rd Author's Affiliation National Institute of Information and Communications Technology(NICT)
4th Author's Name Fumihide Kojima
4th Author's Affiliation National Institute of Information and Communications Technology(NICT)
Date 2019-01-25
Paper # RCC2018-111
Volume (vol) vol.118
Number (no) RCC-423
Page pp.pp.25-30(RCC),
#Pages 6
Date of Issue 2019-01-18 (RCC)