Low Latency DWBA Scheme for Mini-Slot based 5G New Radio in a Fixed and Mobile Converged TWDM-PON
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Journal of Lightwave Technology
AbstractCooperative 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.
Publisher Copyright: IEEE
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
Zhang , J , Liu , X , Liang , M , Yu , H & Ji , Y 2022 , ' Low Latency DWBA Scheme for Mini-Slot based 5G New Radio in a Fixed and Mobile Converged TWDM-PON ' , Journal of Lightwave Technology , vol. 40 , no. 1 , pp. 3-13 . https://doi.org/10.1109/JLT.2021.3117972