Reconfigurable Intelligent Surface Assisted MEC Offloading in NOMA-Enabled IoT Networks

Chen, Zhen; Tang, Jie; Wen, Miaowen; Li, Zan; Yang, Jun; Zhang, Xiu Yin; Wong, Kai‐Kit

doi:10.1109/tcomm.2023.3277005

Cited by 3 publications

(2 citation statements)

References 48 publications

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“…Based on (9), by referring to [26] (Appendix I) and after a small mathematical manipulations, the closed-form expression of statistic outage probability for the links from SBS to user 1 and 2 can be expressed by…”

Section: Problem Formulationmentioning

confidence: 99%

“…Meanwhile, non-orthogonal multiple access (NOMA) can be applied in mobile communications. NOMA potentially outperforms orthogonal multiple access [6][7][8][9] by allocating asymmetric transmission power to users and adopting successive decoding. In [10], a comprehensive study for current advanced NOMA was performed, where applications such as RIS-assisted NOMA were investigated.…”

Section: Introduction 1existing Surveys and Contributionsmentioning

confidence: 99%

See 1 more Smart Citation

An Efficient Block Successive Upper-Bound Minimization Algorithm for Caching a Reconfigurable Intelligent Surface-Assisted Downlink Non-Orthogonal Multiple Access System

Zhou

2024

Electronics

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With the booming rollout of 5G communication, abundant new technologies have been proposed for quality of service requirements. In terms of the betterment in transmission coverage, mobile edge caching (MEC) has shown potential in reducing the transmission outage. The performance of MEC, meanwhile, can be promisingly enhanced by reconfigurable intelligent surfaces (RIS). Under this context, we explore a system comprising a small base-station (SBS) with limited cache capacity, two users, and one RIS. The SBS transmits the contents from the cache or fetches them from the remote backhaul hub to communicate with users through directional and possibly reflective channels. In this point-to-multipoint connection, non-orthogonal multiple access (NOMA) is applied, improving the capacity of the system. To minimize the outage probability, we first propose a caching policy from entropy perspective, based on which we investigate the beamforming and power allocation problem. The issue, however, is non-convex and involves multi-dimensional optimization. To address this, we introduce an efficient block successive upper-bound minimization algorithm, grounded in Gershgorin’s circle theorem. This algorithm aims to find the globally optimal solution for power allocation and RIS beamformer, considering both the channel condition and content popularity. Numerical studies are performed to verify the effectiveness of the proposed algorithm.

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Section: Problem Formulationmentioning

confidence: 99%

Section: Introduction 1existing Surveys and Contributionsmentioning

confidence: 99%

An Efficient Block Successive Upper-Bound Minimization Algorithm for Caching a Reconfigurable Intelligent Surface-Assisted Downlink Non-Orthogonal Multiple Access System

Zhou

2024

Electronics

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Intelligent Reflecting Surface Aided Multi-Tier Hybrid Computing

Zhao,

Wu,

Chen

et al. 2024

IEEE J. Sel. Top. Signal Process.

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Towards Flawless Designs: Recent Progresses in Non-Orthogonal Multiple Access Technology

Dai,

Huang,

Yuan

et al. 2023

Electronics

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High effectiveness and high reliability are two fundamental concerns in data transmission. Non-orthogonal multiple-access (NOMA) technology presents a promising solution for high-speed data transmission, which has long been pursued by academia and industry. However, there is still a significant road ahead for it to effectively support a wide range of applications. This paper provides a comprehensive study, comparison, and classification of the current advanced NOMA schemes from the perspectives of single-carrier (SC) systems, multicarrier (MC) systems, reconfigurable-intelligent-surface (RIS)-assisted systems, and deep-learning (DL)-assisted systems. Specifically, system implementation issues such as the transition from SC-NOMA to MC-NOMA, the relaxation of distinct channel gains, the consideration of imperfect channel knowledge, and the mitigation of error propagation/intra-group interference are involved. To begin with, we present an overview of the state-of-the-art developments related to the advanced design of SC-NOMA. Subsequently, a generalized MC-NOMA framework that provides the diversity–multiplexing gain by enhancing users’ signal-to-interference-plus-noise ratio (SINR) is proposed for better system performance. Moreover, we delve into discussions on RIS-assisted NOMA systems, where the receiver’s SINR can be enhanced by intelligently reconfiguring the reflected signal propagations. Finally, we analyze designs that combine NOMA/RIS-NOMA with DL to achieve highly efficient data transmission. We also identify key trends and future directions in deep-learning-based NOMA frameworks, providing valuable insights for researchers in this field.

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Reconfigurable Intelligent Surface Assisted MEC Offloading in NOMA-Enabled IoT Networks

Cited by 3 publications

References 48 publications

An Efficient Block Successive Upper-Bound Minimization Algorithm for Caching a Reconfigurable Intelligent Surface-Assisted Downlink Non-Orthogonal Multiple Access System

An Efficient Block Successive Upper-Bound Minimization Algorithm for Caching a Reconfigurable Intelligent Surface-Assisted Downlink Non-Orthogonal Multiple Access System

Intelligent Reflecting Surface Aided Multi-Tier Hybrid Computing

Towards Flawless Designs: Recent Progresses in Non-Orthogonal Multiple Access Technology

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