Non-Orthogonal eMBB-URLLC radio access for cloud radio access networks with analog fronthauling

Andrea Matera, Rahif Kassab, Osvaldo Simeone, Umberto Spagnolini

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

This paper considers the coexistence of Ultra Reliable Low Latency Communications (URLLC) and enhanced Mobile BroadBand (eMBB) services in the uplink of Cloud Radio Access Network (C-RAN) architecture based on the relaying of radio signals over analog fronthaul links. While Orthogonal Multiple Access (OMA) to the radio resources enables the isolation and the separate design of different 5G services, Non-Orthogonal Multiple Access (NOMA) can enhance the system performance by sharing wireless and fronthaul resources. This paper provides an information-theoretic perspective in the performance of URLLC and eMBB traffic under both OMA and NOMA. The analysis focuses on standard cellular models with additive Gaussian noise links and a finite inter-cell interference span, and it accounts for different decoding strategies such as puncturing, Treating Interference as Noise (TIN) and Successive Interference Cancellation (SIC). Numerical results demonstrate that, for the considered analog fronthauling C-RAN architecture, NOMA achieves higher eMBB rates with respect to OMA, while guaranteeing reliable low-rate URLLC communication with minimal access latency. Moreover, NOMA under SIC is seen to achieve the best performance, while, unlike the case with digital capacity-constrained fronthaul links, TIN always outperforms puncturing.

Original languageEnglish (US)
Article number661
JournalEntropy
Volume20
Issue number9
DOIs
StatePublished - Sep 2 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Keywords

  • C-RAN
  • EMBB
  • Network slicing
  • RoC
  • URLLC

Fingerprint

Dive into the research topics of 'Non-Orthogonal eMBB-URLLC radio access for cloud radio access networks with analog fronthauling'. Together they form a unique fingerprint.

Cite this