On the Application of BAC-NOMA to 6G umMTC

Zhiguo DIng, H. Vincent Poor

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


This letter studies the application of backscatter communications (BackCom) assisted non-orthogonal multiple access (BAC-NOMA) to the envisioned sixth-generation (6G) ultra-massive machine type communications (umMTC). In particular, the proposed BAC-NOMA transmission scheme can realize simultaneous energy and spectrum cooperation between uplink and downlink users, which is important to support massive connectivity and stringent energy constraints in umMTC. Furthermore, a resource allocation problem for maximizing the uplink throughput and suppressing the interference between downlink and uplink transmission is formulated as an optimization problem and the corresponding optimal resource allocation policy is obtained. Computer simulations are provided to demonstrate the superior performance of BAC-NOMA.

Original languageEnglish (US)
Article number9420716
Pages (from-to)2678-2682
Number of pages5
JournalIEEE Communications Letters
Issue number8
StatePublished - Aug 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

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


  • Non-orthogonal multiple access
  • backscatter communications
  • full-duplex communications


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