On Uplink Non-Orthogonal Multiple Access for 5G: Opportunities and Challenges

被引：22
|
作者：
Tian, Li [1 ]
Yan, Chunlin [1 ]
Li, Weimin [1 ]
Yuan, Zhifeng [1 ]
Cao, Wei [1 ]
Yuan, Yifei [1 ]
机构：
[1] ZTE Corp, South Keji Rd 55, Shenzhen 508118, Peoples R China
来源：
CHINA COMMUNICATIONS | 2017年 / 14卷 / 12期
基金：
中国国家自然科学基金;
关键词：
5G New Radio; non-orthogonal multiple access; grant-free transmission;
D O I：
10.1109/CC.2017.8246331
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
In this paper, the concept of grant-free non-orthogonal multiple access (NOMA) for uplink data transmission is elaborated. NOMA in combination with grant-free can be applied to ultra reliability low latency communication (URLLC), massive machine type communication (mMTC), enhanced mobile broadband (eMBB) small packet and two-step random-access channel (RACH) scenarios. The advantages of grant-free NOMA are low latency and signaling overhead, high access capability and efficient resource utilization. Candidate uplink NOMA schemes are summarized and preliminary comparison among a subset of schemes are presented. Furthermore, design aspects for grant-free NOMA are discussed, with special notes on particular issues such as blind UE identification and transmitter/receiver (Tx/Rx) impairments in realistic deployment.
引用
收藏
页码：142 / 152
页数：11
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