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

Kondepu, Koteswararao; Sgambelluri, Andrea; Sambo, N.; Giannone, F.; Castoldi, P.; Valcarenghi, L.

doi:10.1364/jocn.10.000843

Cited by 15 publications

(9 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More recently, methods have been proposed to specifically address failures when 5G functions are virtualized. In [24], a two-step resiliency scheme is proposed to overcome soft failures of optical circuits (lightpaths) carrying the fronthaul traffic. When not enough resources are available along the backup lightpath, the next generation eNB (gNB) functional split is dynamically reconfigured to reduce the fronthaul capacity requirements.…”

Section: Related Workmentioning

confidence: 99%

Live Migration of Virtual Machine and Container Based Mobile Core Network Components: A Comprehensive Study

et al. 2021

View full text Add to dashboard Cite

With the increasing demand for openness, flexibility, and monetization, the Network Function Virtualization (NFV) of mobile network functions has become the embracing factor for most mobile network operators. Early reported field deployments of virtualized Evolved Packet Core (EPC) -the core network (CN) component of 4G LTE and 5G non-standalone mobile networks -reflect this growing trend. To best meet the requirements of power management, load balancing, and fault tolerance in the cloud environment, the need for live migration of these virtualized components cannot be shunned. Virtualization platforms of interest include both Virtual Machines (VMs) and Containers, with the latter option offering more lightweight characteristics. This paper's first contribution is the proposal of a framework that enables migration of containerised virtual EPC components using an open-source migration solution which does not fully support the mobile network protocol stack yet. The second contribution is an experimental-based comprehensive analysis of live migration in two virtualization technologies -VM and Container -with the additional scrutinization on the container migration approach. The presented experimental comparison accounts for several system parameters and configurations: flavor (image) size, network characteristics, processor hardware architecture model, and the CPU load of the backhaul network components. The comparison reveals that the live migration completion time and also the end-user service interruption time of the virtualized EPC components is reduced approximately by 70% in the container platform when using the proposed framework.

show abstract

Section: Related Workmentioning

confidence: 99%

Live Migration of Virtual Machine and Container Based Mobile Core Network Components: A Comprehensive Study

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In addition, some works have studied the implementation of split selection over optical fiber networks [28]- [32]. For instance, the authors of [31] depict an architecture, called F-RAN, able to dynamically choose the best split selection, based on radio performance and optic transport capacity.…”

Section: Related Workmentioning

confidence: 99%

“…The architecture employs SDN to manage the underlying optical network, according to the selected split. Similarly, the authors of [32] propose a two-step solution to adapt the transmission of the underlying optical network, when degradation in the light-path occurs, along with split selection reconfiguration.…”

Section: Related Workmentioning

confidence: 99%

Understanding the Performance of Flexible Functional Split in 5G vRAN Controllers: A Markov Chain-Based Model

Díez

Hervella

Agüero

2021

IEEE Trans. Netw. Serv. Manage.

View full text Add to dashboard Cite

We study Flexible Functional Split functionality of 5G vRAN controllers in 5G networks. We propose an innovative model, based on a Markov Chain, which can be used to characterize their performance. We consider both infinite and finite-buffer controllers. In the former, frames would not be lost (provided the system works in a stable regime), and we thus focus on the time frames stay at the controller. For the finite-buffer controller, there might be losses, and we analyze the trade-off between time at the controller (which might hinder the stringent delay requirements of 5G services), and loss probability. Matrix-geometric techniques are used to resolve the corresponding Quasi-Birth-Death process. The validity of the proposed model is assessed by means of an extensive experiment campaign carried out over an ad-hoc eventdriven simulator, which is also used to broaden the analysis, considering different service rate distributions, as well as the variability of the studied performance indicators. The results show that the proposed model can be effectively exploited to tackle the dimensioning of these systems, as it sheds light on how their configuration impacts the expected delay and loss rate.

show abstract

“…Link survivability can be classified into two categories: protection [81,82] and restoration [83]. The authors of [84,85] have focused on the link recovery in C-RAN.…”

Section: Survivabilitymentioning

confidence: 99%

Virtual Network Embedding for Multi-Domain Heterogeneous Converged Optical Networks: Issues and Challenges

Zong

Feng

Guan

et al. 2020

Sensors

View full text Add to dashboard Cite

The emerging 5G applications and the connectivity of billions of devices have driven the investigation of multi-domain heterogeneous converged optical networks. To support emerging applications with their diverse quality of service requirements, network slicing has been proposed as a promising technology. Network virtualization is an enabler for network slicing, where the physical network can be partitioned into different configurable slices in the multi-domain heterogeneous converged optical networks. An efficient resource allocation mechanism for multiple virtual networks in network virtualization is one of the main challenges referred as virtual network embedding (VNE). This paper is a survey on the state-of-the-art works for the VNE problem towards multi-domain heterogeneous converged optical networks, providing the discussion on future research issues and challenges. In this paper, we describe VNE in multi-domain heterogeneous converged optical networks with enabling network orchestration technologies and analyze the literature about VNE algorithms with various network considerations for each network domain. The basic VNE problem with various motivations and performance metrics for general scenarios is discussed. A VNE algorithm taxonomy is presented and discussed by classifying the major VNE algorithms into three categories according to existing literature. We analyze and compare the attributes of algorithms such as node and link embedding methods, objectives, and network architecture, which can give a selection or baseline for future work of VNE. Finally, we explore some broader perspectives in future research issues and challenges on 5G scenario, field trail deployment, and machine learning-based algorithms.

show abstract

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

Cited by 15 publications

References 20 publications

Live Migration of Virtual Machine and Container Based Mobile Core Network Components: A Comprehensive Study

Live Migration of Virtual Machine and Container Based Mobile Core Network Components: A Comprehensive Study

Understanding the Performance of Flexible Functional Split in 5G vRAN Controllers: A Markov Chain-Based Model

Virtual Network Embedding for Multi-Domain Heterogeneous Converged Optical Networks: Issues and Challenges

Contact Info

Product

Resources

About