Hybrid Multiple-Access: Mode Selection, User Pairing and Resource Allocation

A. Ebrahim, Abdulkadir Celik, Emad Alsusa, Mohammed W. Baidas, Ahmed Eltawil

Research output: Contribution to journalArticlepeer-review


This paper proposes hybridization of non-orthogonal multiple-access (NOMA) and orthogonal multiple access (OMA) schemes for next-generation cellular networks. Two hybrid schemes that operate NOMA/OMA mode selection as well as channel and power allocation are proposed to improve the resource utilization and bandwidth-efficiency for network capacity maximization. The two proposed hybrid schemes are: (1) single-cell hybrid multiple-access (SC-HMA) and (2) multi-cell hybrid multiple-access (MC-HMA) schemes. The SC-HMA scheme determines the optimal NOMA/OMA mode and user pairs in each resource block by utilizing a capacity matrix representing the capacity outcomes of pairing all possible combinations of users. On the other hand, in the MC-HMA, the NOMA/OMA modes are categorized into intra-cell and inter-cell based on an interference map, where the principal objective is to determine the best mode of operation between the user pairs to improve the overall sum-rate and quality-of-service (QoS). The results show that the proposed HMA schemes provide superior overall network capacity compared to the benchmark schemes. In addition, the SC-HMA scheme outperforms the MC-HMA in terms of network capacity at the expense of higher computational complexity.
Original languageEnglish (US)
Pages (from-to)1-1
Number of pages1
JournalIEEE Access
StatePublished - Sep 28 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-10-03

ASJC Scopus subject areas

  • General Engineering
  • General Computer Science
  • General Materials Science


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