Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Orchestrating Lightpath Recovery and Flexible Functional Split to Preserve Virtualized RAN Connectivity

Not Accessible

Your library or personal account may give you access

Abstract

In the next-generation radio access network (NG RAN), the next-generation evolved NodeBs (gNBs) will be, likely, split into virtualized central units (CUs) and distributed units (DUs) interconnected by a fronthaul network. Because of fronthaul latency and capacity requirements, optical metro-ring networks are among the main candidates for supporting converged 5G and non-5G services. In this scenario, a degradation in the quality of transmission of the lightpaths connecting DU and CU can be revealed (or anticipated) based on monitoring techniques. Thus, the lightpath transmission parameters can be adapted to maintain the required bit error rate (BER). However, in specific cases, the original requested capacity between DU and CU could be not guaranteed, thus impacting the service. In this case, another DU–CU connectivity should be considered, relying on a change of the so-called functional split. This study proposes a two-step recovery scheme orchestrating lightpath transmission adaptation and functional split reconfiguration to guarantee the requested connectivity in a virtualized RAN fronthaul. Results show that, for the connections that cannot be transported by the original lightpath, a graceful degradation followed by a recovery is possible within tens of seconds.

© 2018 Optical Society of America

Full Article  |  PDF Article
More Like This
Edge-enhanced graph neural network for DU-CU placement and lightpath provision in X-Haul networks

Ruikun Wang, Jiawei Zhang, Zhiqun Gu, Shuangyi Yan, Yuming Xiao, and Yuefeng Ji
J. Opt. Commun. Netw. 14(10) 828-839 (2022)

Exploiting flexible functional split in converged software defined access networks

Andrea Marotta, Dajana Cassioli, Koteswararao Kondepu, Cristian Antonelli, and Luca Valcarenghi
J. Opt. Commun. Netw. 11(11) 536-546 (2019)

Energy-Efficient Dynamic Lightpath Adjustment in a Decomposed AWGR-Based Passive WDM Fronthaul

Hao Yu, Jiawei Zhang, Yuefeng Ji, and Massimo Tornatore
J. Opt. Commun. Netw. 10(9) 749-759 (2018)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (8)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (4)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved