Hierarchical Multiple Access (HiMA) for Fog-RAN: Protocol Design and Resource Allocation

被引:3
|
作者
Papanikolaou, Vasilis K. [1 ]
Mitsiou, Nikos A. [1 ]
Diamantoulakis, Panagiotis D. [1 ]
Ding, Zhiguo [2 ]
Karagiannidis, George K. [1 ]
机构
[1] Aristotle Univ Thessaloniki, Dept Elect & Comp Engn, Wireless Commun & Informat Proc WCIP Grp, Thessaloniki 54636, Greece
[2] Univ Manchester, Sch Elect & Elect Engn, Manchester M13 9PL, Lancs, England
基金
欧盟地平线“2020”; 英国工程与自然科学研究理事会;
关键词
NOMA; Resource management; Wireless communication; Uplink; Time division multiple access; Technological innovation; Throughput; Non-orthogonal multiple access (NOMA); hierarchical NOMA; asynchronous TDMA; convex optimization; resource allocation; PERFORMANCE ANALYSIS; COOPERATIVE NOMA; NETWORKS;
D O I
10.1109/TWC.2021.3100538
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
We introduce a set of multiple access protocols, called hierarchical multiple access (HiMA), which are based on non-orthogonal multiple access (NOMA) and time-division multiple access (TDMA), optimized for the hierarchical network scenario. The proposed protocols can be efficiently utilized in various network configurations with an hierarchical form, such as relay networks, cloud-radio access networks (C-RANs), and fog-radio access networks (F-RANs). In particular, C-RANs and, more recently, F-RANs are regarded as promising paradigms to fully utilize the edge of the networks. Therefore, the implementation of novel multiple access protocols to properly exploit these configurations is critical for the fifth generation and beyond of wireless access. Furthermore, the resource allocation problem is formulated for each protocol with respect to the timeslot duration and power. As a result two fairness metrics are optimized, namely max-min rate fairness and proportional fairness. Finally, numerical results reveal the effectiveness of the joint design in the hierarchical network and an interesting trade-off is identified between fairness and achievable rate. Interestingly, despite NOMA being a very promising alternative to conventional multiple access schemes, the protocol that is solely based on NOMA does not always outperform the rest.
引用
收藏
页码:960 / 975
页数:16
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