Mode selection between index coding and superposition coding in cache-based NOMA networks

Yaru Fu, Ye Liu, Hong Wang, Zheng Shi, Yuanwei Liu

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)
80 Downloads (Pure)


By analytically showing that index coding (IC) is more power efficient than superposition coding (SC) when appropriate caching contents are available for a pair of users, we propose a sub-optimal joint user clustering and power allocation scheme for a single-cell downlink non-orthogonal multiple access network with caching memory at the receivers that alternate between IC and SC. Simulation studies demonstrate that the proposed scheme significantly reduces the transmission power when compared with the benchmark scheme that only allows SC.
Original languageEnglish
Article number8610284
Pages (from-to)478-481
Number of pages4
JournalIEEE Communications Letters
Issue number3
Early online date11 Jan 2019
Publication statusPublished - Mar 2019
Externally publishedYes

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  • Caching
  • NOMA
  • index coding (IC)
  • optimal power control
  • superposition coding (SC)
  • user clustering

ASJC Scopus subject areas

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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