Combination of Ultra-Dense Networks and Other 5G Enabling Technologies: A Survey

被引:94
作者
Adedoyin, Mary A. [1 ]
Falowo, Olabisi E. [1 ]
机构
[1] Univ Cape Town, Dept Elect Engn, ZA-7700 Cape Town, South Africa
基金
新加坡国家研究基金会; 芬兰科学院;
关键词
Macrocells; small cells; ultra-dense networks; QoS; RADIO RESOURCE-MANAGEMENT; NONORTHOGONAL MULTIPLE-ACCESS; SMALL-CELL NETWORKS; OFDMA FEMTOCELL NETWORKS; WIRELESS NETWORKS; MASSIVE-MIMO; INTERFERENCE MANAGEMENT; NEXT-GENERATION; HETEROGENEOUS NETWORKS; DESIGN CONSIDERATIONS;
D O I
10.1109/ACCESS.2020.2969980
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Recently, to address the astonishing capacity requirement of 5G, researchers are investigating the possibility of combining different technologies with ultra-dense networks (UDNs). However, the ultra-dense deployment of small cells in the coverage area of conventional macrocells known as UDNs introduces new technical challenges such as severe interference, unfairness in radio resource sharing, unnecessary handover, a significant increase in energy consumption, and degraded quality-of-service (QoS). To overcome these challenges and achieve the performance requirements in 5G, there is a need to combine UDNs with other 5G enabling technologies and then, design intelligent management techniques for better performance of the overall networks. Hence, in this paper, we present a comprehensive survey on different generations of wireless networks, 5G new radio (NR) standards, 5G enabling technologies and the importance of combining UDNs with other 5G technologies. Also, we present an extensive overview of the recent advances and research challenges in intelligent management techniques and backhaul solutions in the last five years for the combination of UDNs and other enabling technologies that offers the visions of 5G. We summarise the mathematical tools widely exploited in solving these problems and the performance metrics used to evaluate the intelligent management algorithms. Moreover, we classify various intelligent management algorithms according to the adopted enabling technologies, benefits, challenges addressed, mathematical tools and performance metrics used. Finally, we summarise the open research challenges, provide design guidelines and potential research directions for the development of intelligent management techniques and backhaul solutions for the combination of UDNs and other 5G technologies.
引用
收藏
页码:22893 / 22932
页数:40
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