Low Latency DWBA Scheme for Mini-Slot based 5G New Radio in a Fixed and Mobile Converged TWDM-PON

Jiawei Zhang, Xiaozhu Liu, Minghui Liang, Hao Yu, Yuefeng Ji

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)
94 Downloads (Pure)


Cooperative dynamic bandwidth allocation (CO-DBA) enables time division multiplexed passive optical network (TDM-PON) to become a possible solution for mobile fronthaul. Meanwhile, status-report DBA (SR-DBA) still retains its advantage on bandwidth efficiency for conventional PON services. The collaboration of CO-and SR-DBA is an enabling approach for fixed-mobile convergence into a single PON infrastructure. However, a resource allocation conflict between CO-and SR-DBA is to arise when using an emerging 5G new radio interface based on the mini-slot. This conflict will cause a large delay that can not meet the time-sensitive fronthaul requirement. In this study, we consider a time and wavelength multiplexed PON (TWDM-PON) for fixed and mobile services accommodation because of its capacity and flexibility. A novel DWBA scheme is proposed by means of wavelength and bandwidth preemption (WBP) mechanism. The basic rule of WBP is that a time-sensitive traffic can preempt the wavelength and bandwidth allocated to the time-tolerent traffic when a conflict happens. We demonstrate that the proposed DWBA can significantly reduce the latency caused by the conflict, when compared to the existing integrated CO-and SR-DWBA approach with 5G NR mini-slot.

Original languageEnglish
Pages (from-to)3-13
Number of pages11
JournalJournal of Lightwave Technology
Issue number1
Early online date7 Oct 2021
Publication statusPublished - 1 Jan 2022
MoE publication typeA1 Journal article-refereed


  • 5G mobile communication
  • Bandwidth
  • Delays
  • Low latency
  • mini-slot based 5G NR
  • OFDM
  • Optical fiber subscriber loops
  • Optical network units
  • Passive optical networks
  • TWDM-PON based fronthaul
  • wavelength and bandwidth preemption


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