An Enhanced Relay Selection Scheme for NOMA-based Cooperative Opportunistic Multicast Scheme

被引：0

作者：

Zhang, Yufang ^{[1
]}

Wang, Xiaoxiang ^{[1
]}

Wang, Dongyu ^{[1
]}

Zhao, Qiang ^{[2
]}

Zhang, Yibo ^{[1
]}

机构：

[1] Beijing Univ Posts & Telecom, Minist Educ, Key Lab Universal Wireless Comm, Beijing, Peoples R China

[2] State Key Lab Aerosp Dynam, Xian, Shaanxi, Peoples R China

来源：

2019 26TH INTERNATIONAL CONFERENCE ON TELECOMMUNICATIONS (ICT) | 2019年

基金：

中国国家自然科学基金;

关键词：

Coverage efficiency; cooperative multicast; path loss; relay selection scheme;

D O I：

10.1109/ict.2019.8798861

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Non-orthogonal multiple access (NOMA) based cooperative opportunistic multicast scheme uses the efficient relay selection range (ERSR) with a fixed radius to select user relay (UR). This results in UR redundancy, especially in the cell centre with high density of candidate UR. Coverage efficiency, defined as the ratio of the number of successful users to that of URs, is low. Aiming at this problem, a range division user relay selection scheme (termed as RDUR) is proposed in this paper. Firstly, it divides the circular coverage range of base station into several continuous annular areas (AAs). Secondly, different AAs are allocated different ERSRs (i.e., the radius of ERSR is different), which decides the width of AA. Lastly, the ERSR set that optimizes system coverage efficiency is used to perform UR selection. From simulation results, through RDUR, coverage efficiency increases by at least 28%, even though capacity efficiency decreases by 6%.

引用

页码：119 / 123

页数：5

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