Delay Minimization for NOMA-Assisted MEC under Power and Energy Constraints

Ming Zeng, Nam Phong Nguyen, Octavia A. Dobre, H. Vincent Poor

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


This letter considers delay minimization for offloading in a mobile edge computing network with multiple users. We first show that under the same power constraint, using non-orthogonal multiple access (NOMA) can reduce the overall delay compared with time-division multiple access (TDMA). However, in this case, NOMA also consumes more energy. To ensure a fair comparison, we also consider the case when NOMA and TDMA are constrained by the same energy. Depending on the available energy, three scenarios are identified, and the corresponding optimal strategies are introduced. Simulations are conducted, showing that the proposed NOMA scheme can achieve substantial delay reduction compared with TDMA.

Original languageEnglish (US)
Article number8794550
Pages (from-to)1657-1661
Number of pages5
JournalIEEE Wireless Communications Letters
Issue number6
StatePublished - Dec 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


  • Mobile edge computing (MEC)
  • delay minimization
  • non-orthogonal multiple access (NOMA)
  • offloading


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