Luong N.C.[Luong N.C.]; Hoang D.T.[Hoang D.T.]; Gong S.[Gong S.]; Niyato D.[Niyato D.]; Wang P.[Wang P.]; Liang Y.-C.[Liang Y.-C.]; Kim D.I.[Kim D.I.]
ArticleIssue Date2019CitationIEEE Communications Surveys and Tutorials, v.21, no.4, pp.3133 - 3174PublisherInstitute of Electrical and Electronics Engineers Inc.