Gong, S.[Gong, S.]; Lu, X.[Lu, X.]; Hoang, D.T.[Hoang, D.T.]; Niyato, D.[Niyato, D.]; Shu, L.[Shu, L.]; Kim, D.I.[Kim, D.I.]; Liang, Y.-C.[Liang, Y.-C.]
ArticleIssue Date2020CitationIEEE Communications Surveys and Tutorials, v.22, no.4, pp.2283 - 2314PublisherInstitute of Electrical and Electronics Engineers Inc.