Presentation 2022-05-27
[Invited Lecture] Non-Orthogonal Multiple Access for Infrastructure-less Cellular-V2X
Takeshi Hirai,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) This paper introduces non-orthogonal multiple access (NOMA) techniques for the infrastructure-less cellular-vehicle-to-everything (C-V2X) that depends on no central coordinators, such as base stations. In NOMA, each receiver uses the successive interference cancellation (SIC) to decode superposed signals in the power domain. Each SIC iteration requires an enough high signal-to-interference-and-noise ratio (SINR) for the receiver to decode the signal. However, the infrastructure-less C-V2X, i.e., a decentralized and broadcast network, may provide a lower SINR in each iteration than the centralized unicast networks, and the NOMA benefits in the infrastructure-less C-V2X have remained unclear. To this end, this paper presents the author’s proposed NOMA methods for the infrastructure-less C-V2X. Our results highlighted that NOMA advanced the infrastructure-less C-V2X and boosted packet reception ratios over the existing infrastructure-less C-V2X without NOMA.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Infrastructure-less C-V2X / sensing-based SPS / NOMA / SIC
Paper # IN2022-8,RCS2022-21
Date of Issue 2022-05-19 (IN, RCS)

Conference Information
Committee IN / RCS
Conference Date 2022/5/26(2days)
Place (in Japanese) (See Japanese page)
Place (in English) Keio University (Hiyoshi Campus)
Topics (in Japanese) (See Japanese page)
Topics (in English) Ad-Hoc/Sensor Networks/MANET, Mobile Networks, M2M/IoT Communications, Wi-Fi, IEEE802.15(ZigBee) and others
Chair Kenji Ishida(Hiroshima City Univ.) / Eiji Okamoto(Nagoya Inst. of Tech.)
Vice Chair Kunio Hato(Internet Multifeed) / Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) / Fumihide Kojima(NICT)
Secretary Kunio Hato(NTT) / Toshihiko Nishimura(Univ. of Nagasaki) / Tomoya Tandai(Nagaoka Univ. of Tech.) / Fumihide Kojima(KDDI Research)
Assistant / 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 Information Networks / Technical Committee on Radio Communication Systems
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) [Invited Lecture] Non-Orthogonal Multiple Access for Infrastructure-less Cellular-V2X
Sub Title (in English)
Keyword(1) Infrastructure-less C-V2X
Keyword(2) sensing-based SPS
Keyword(3) NOMA
Keyword(4) SIC
1st Author's Name Takeshi Hirai
1st Author's Affiliation Osaka University(Osaka Univ.)
Date 2022-05-27
Paper # IN2022-8,RCS2022-21
Volume (vol) vol.122
Number (no) IN-48,RCS-49
Page pp.pp.38-42(IN), pp.40-44(RCS),
#Pages 5
Date of Issue 2022-05-19 (IN, RCS)