A Survey on Applications of Cache-Aided NOMA
Document Type
Article
Publication Title
IEEE Communications Surveys and Tutorials
Abstract
Contrary to orthogonal multiple-access (OMA), non-orthogonal multiple-access (NOMA) schemes can serve a pool of users without exploiting the scarce frequency or time domain resources. This is useful in meeting the future network requirements (5G and beyond systems), such as, low latency, massive connectivity, users' fairness, and high spectral efficiency. On the other hand, content caching restricts duplicate data transmission by storing popular contents in advance at the network edge which reduces data traffic. In this survey, we focus on cache-aided NOMA-based wireless networks which can reap the benefits of both cache and NOMA; switching to NOMA from OMA enables cache-aided networks to push additional files to content servers in parallel and improve the cache hit probability. Beginning with fundamentals of the cache-aided NOMA technology, we summarize the performance goals of cache-aided NOMA systems, present the associated design challenges, and categorize the recent related literature based on their application verticals. Concomitant standardization activities and open research challenges are highlighted as well.
First Page
1571
Last Page
1603
DOI
10.1109/COMST.2023.3293231
Publication Date
7-7-2023
Keywords
Caching, non-orthogonal multiple access, standardization
Recommended Citation
D. Bepari et al., "A Survey on Applications of Cache-Aided NOMA," in IEEE Communications Surveys & Tutorials, vol. 25, no. 3, pp. 1571-1603, thirdquarter 2023, doi: 10.1109/COMST.2023.3293231
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