Power Allocation for D2D NOMA in Cache-Aided Networks

被引：1

作者：

Shen, Kevin Z. ^{[1
]}

So, Daniel K. C. ^{[1
]}

机构：

[1] Univ Manchester, Dept Elect & Elect Engn, Manchester, Lancs, England

来源：

2021 IEEE 94TH VEHICULAR TECHNOLOGY CONFERENCE (VTC2021-FALL) | 2021年

基金：

英国工程与自然科学研究理事会;

关键词：

non-orthogonal multiple access (NOMA); device-to-device communications (D2D); wireless caching; power allocation; NONORTHOGONAL MULTIPLE-ACCESS; RESOURCE-ALLOCATION;

D O I：

10.1109/VTC2021-FALL52928.2021.9625282

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) is effective in enhancing the spectral efficiency and sum rate of a system as compared to an orthogonal scheme. In addition to this, as mobile users consume more rich content, the role of device-to-device communications (D2D) and wireless caching will become more prominent in further optimizing the usage of resources. In this paper, we propose a system in which users are able to exchange useful cached content with each other via a D2D link which underlays a downlink NOMA transmission. We formulated a sum rate maximization problem that is subject to minimum rate constraints and derived a sub-optimal power allocation solution based on a low self-interference assumption. Simulation results demonstrate the effectiveness of D2D communications in comparison with optimum conventional NOMA downlink, as well as highlighting the similarity in performance between the sub-optimal power allocation and the optimum power allocation.

引用

页数：6

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