STAR-RIS Empowered NOMA Systems With Caching and SWIPT Article Swipe
Thai-Hoc Vu
,
Anand Jee
,
Daniel Benevides da Costa
,
Sunghwan Kim
·
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.1109/ojcoms.2023.3344582
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.1109/ojcoms.2023.3344582
This paper proposes the joint use of caching and simultaneous wireless information and power transfer (SWIPT) to enhance the performance of cell-edge users of down-uplink simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS)-empowered non-orthogonal multiple access (NOMA) systems. The main idea is to leverage the available caching at nearby users to establish cooperative communication while taking into account the problem of energy issues through SWIPT mechanisms, namely time-switching (TS) and power-splitting (PS) strategies. To improve the communication quality of users, STAR-RIS with an energy-splitting (ES) protocol is established and phase-shift design is formulated. Closed-form approximations and asymptotic expressions for users’ outage probability (OP) and effective ergodic capacity (EC) are derived. Based on the attained expressions, useful insights into system design, such as the impact of power allocation, imperfect successive interference cancellation, the number of transmit/reflect components on the system performance, trade-offs between the network requirement and the system performance, and trade-offs between the energy harvesting process and data transmission quality, are deduced. Numerical examples verify our derivations and show that: i) the performance of cell-edge users is improved significantly; ii) exploiting SWIPT-PS shows better OP and EC performance for nearby users compared to SWIPT-TS, while both provide comparable performance for cooperative communication; iii) as the performance of cell-edge users is mostly guaranteed, the communication quality of nearby users in downlink and source node in uplink can be improved by optimizing either the power budget or the energy harvesting factors; iv) adopting STAR-RIS with ES protocol outperforms mode-switching and time-splitting ones in terms of both OP and EC; and v) STAR-RIS-empowered NOMA has better EC performance than orthogonal-multiple access counterparts when SIC operation is properly designed.
Related Topics
Concepts
Maximum power transfer theorem
Computer science
Telecommunications link
Single antenna interference cancellation
Wireless
Leverage (statistics)
Energy harvesting
Enhanced Data Rates for GSM Evolution
Computer network
Communications system
Node (physics)
Power (physics)
Electronic engineering
Energy (signal processing)
Channel (broadcasting)
Telecommunications
Engineering
Mathematics
Physics
Statistics
Machine learning
Structural engineering
Quantum mechanics
Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1109/ojcoms.2023.3344582
- https://ieeexplore.ieee.org/ielx7/8782661/8901158/10365688.pdf
- OA Status
- gold
- Cited By
- 18
- References
- 57
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4389961138
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
-
https://openalex.org/W4389961138Canonical identifier for this work in OpenAlex
- DOI
-
https://doi.org/10.1109/ojcoms.2023.3344582Digital Object Identifier
- Title
-
STAR-RIS Empowered NOMA Systems With Caching and SWIPTWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2023Year of publication
- Publication date
-
2023-12-19Full publication date if available
- Authors
-
Thai-Hoc Vu, Anand Jee, Daniel Benevides da Costa, Sunghwan KimList of authors in order
- Landing page
-
https://doi.org/10.1109/ojcoms.2023.3344582Publisher landing page
- PDF URL
-
https://ieeexplore.ieee.org/ielx7/8782661/8901158/10365688.pdfDirect link to full text PDF
- Open access
-
YesWhether a free full text is available
- OA status
-
goldOpen access status per OpenAlex
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https://ieeexplore.ieee.org/ielx7/8782661/8901158/10365688.pdfDirect OA link when available
- Concepts
-
Maximum power transfer theorem, Computer science, Telecommunications link, Single antenna interference cancellation, Wireless, Leverage (statistics), Energy harvesting, Enhanced Data Rates for GSM Evolution, Computer network, Communications system, Node (physics), Power (physics), Electronic engineering, Energy (signal processing), Channel (broadcasting), Telecommunications, Engineering, Mathematics, Physics, Statistics, Machine learning, Structural engineering, Quantum mechanicsTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
18Total citation count in OpenAlex
- Citations by year (recent)
-
2025: 4, 2024: 14Per-year citation counts (last 5 years)
- References (count)
-
57Number of works referenced by this work
- Related works (count)
-
10Other works algorithmically related by OpenAlex
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