5G Xhaul and Service Convergence: Transmission, Switching and Automation Enabling Technologies

Iovanna, Paola; Cavaliere, Fabio; Stracca, Stefano; Giorgi, L.; Ubaldi, Fabio

doi:10.1109/jlt.2020.2983469

Cited by 13 publications

(9 citation statements)

References 19 publications

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“…This context, Open Base Station Standard Initiative (OBSAI) and Common Public Radio Interface (CPRI) are common transmission techniques in 4G fronthaul networks, though inadequate for massive 5G/B5G services. Later, Ethernetbased CPRI (e-CPRI), digitalizing the RF signal is commonly used in 5G fronthaul network rollouts, due to its flexibility, efficiency and low quantisation resolution required [62][63][64].…”

Section: Transmission Layermentioning

confidence: 99%

Results and Achievements of the ALLIANCE Project: New Network Solutions for 5G and Beyond

et al. 2021

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Leaving the current 4th generation of mobile communications behind, 5G will represent a disruptive paradigm shift integrating 5G Radio Access Networks (RANs), ultra-high-capacity access/metro/core optical networks, and intra-datacentre (DC) network and computational resources into a single converged 5G network infrastructure. The present paper overviews the main achievements obtained in the ALLIANCE project. This project ambitiously aims at architecting a converged 5G-enabled network infrastructure satisfying those needs to effectively realise the envisioned upcoming Digital Society. In particular, we present two networking solutions for 5G and beyond 5G (B5G), such as Software Defined Networking/Network Function Virtualisation (SDN/NFV) on top of an ultra-high-capacity spatially and spectrally flexible all-optical network infrastructure, and the clean-slate Recursive Inter-Network Architecture (RINA) over packet networks, including access, metro, core and DC segments. The common umbrella of all these solutions is the Knowledge-Defined Networking (KDN)-based orchestration layer which, by implementing Artificial Intelligence (AI) techniques, enables an optimal end-to-end service provisioning. Finally, the cross-layer manager of the ALLIANCE architecture includes two novel elements, namely the monitoring element providing network and user data in real time to the KDN, and the blockchain-based trust element in charge of exchanging reliable and confident information with external domains.

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Section: Transmission Layermentioning

confidence: 99%

Results and Achievements of the ALLIANCE Project: New Network Solutions for 5G and Beyond

et al. 2021

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“…An efficient transport infrastructure should be able to accommodate different services, as well as different radio split options. This concept is usually referred as Xhaul [7]. In [7], alternative Xhaul implementations are reported, including a case where PON physical infrastructure is used, but not its Time Division Multiplexing Access (TDMA) protocol.…”

Section: Reference Network Scenario and Main Requirementsmentioning

confidence: 99%

“…In [7], alternative Xhaul implementations are reported, including a case where PON physical infrastructure is used, but not its Time Division Multiplexing Access (TDMA) protocol. Wavelength Division Multiplexing (WDM) has several advantages for the implementation of an Xhaul infrastructure: it is transparent to the different radio interfaces, it maximizes the transported capacity over optical fiber and has low latency [7]. However, a key aspect for enabling the path towards NFV is to provide a suitable level of automation.…”

Section: Reference Network Scenario and Main Requirementsmentioning

confidence: 99%

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Optical Technology for NFV Converged Networks

et al. 2021

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5G and its evolution towards 6G is unlocking new use cases that will require the reconsideration of the existing network architectures and its operation. As the network will be required to support new service types and radio protocol splits, the traditional physical point to point connections will need to be replaced with a transport network up to the antenna site to guarantee low latency services and high bandwidth. Optical based transport is a key enabler to realize such a convergent network, where the traditional fixed infrastructure in use for mobile services and mobile infrastructure should also support enterprises services. The Software Defined Network (SDN) and Network Function Virtualization (NFV) technology plays a key role to evolve towards digitalization. It allows to simplify the creation of new services and to implement a real decoupling between the infrastructure and the network functions that run virtually, on generic processing units located everywhere in the network. Supporting automation is a key requirement that traditional optical technology is not able to meet. In this paper the reference scenarios for the access network are presented with the analysis of their requirements and the enabling optical solutions based on integrated silicon photonics.

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“…Ethernetbased CPRI (e-CPRI), which performs a digitization of the RF signal, is used in current 5G fronthaul network rollouts due to its higher efficiency, flexibility, and its low quantization resolution requirement. Moreover, e-CPRI is compatible with both telecom and enterprise networks enabling Xhaul deployments [5]- [7]. Despite all these benefits, e-CPRI requires significant digital signal processing (DSP) resources in the RRH that increases the system power consumption.…”

Section: Introductionmentioning

confidence: 99%

High Capacity Converged Passive Optical Network and RoF-Based 5G+ Fronthaul Using 4-PAM and NOMA-CAP Signals

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Altabás

et al. 2021

J. Lightwave Technol.

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Network architectural changes to satisfy all the 5G+ mobile network specifications and requirements are necessary due to the popularization of streaming and cloud applications on omnipresent portable devices. The combination of massive installation of micro-cell antenna sites with the cloud access radio network (C-RAN) architecture has recently been nominated as a promising technology for high-capacity mobile fronthaul links, albeit at a high cost. An alternative approach for next-generation fronthaul networks is to utilize the already deployed passive optical networks (PONs) where wireless and wired services may coexist in a converged manner. Non-orthogonal multiple access (NOMA) modulation with multi-band carrierless amplitude and phase modulation (NOMA-CAP) has recently been investigated as a promising 5G+ modulation format candidate to increase the capacity and flexibility of future mobile networks. Here, we experimentally demonstrate the convergence of a NOMA-CAP wireless waveform with a single-carrier wired signal in a PON scenario using radio-over-fiber (RoF) technology. Specifically, fifteen NOMA-CAP bands, with two NOMA power levels to double the capacity, transmit 15 Gb/s multiplexed with a digital 10 Gb/s four-level pulse amplitude modulation (PAM-4) signal for downlink application. Two converged system implementations have been considered, first using electrical frequency division multiplexing (EFDM) and secondly using the hybrid EFDMwavelength division multiplexing (EFDM-WDM). Successful transmission through a 25 km span of standard single-mode fiber is achieved with negligible transmission penalty for both proposed converged solutions.

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5G Xhaul and Service Convergence: Transmission, Switching and Automation Enabling Technologies

Cited by 13 publications

References 19 publications

Results and Achievements of the ALLIANCE Project: New Network Solutions for 5G and Beyond

Results and Achievements of the ALLIANCE Project: New Network Solutions for 5G and Beyond

Optical Technology for NFV Converged Networks

High Capacity Converged Passive Optical Network and RoF-Based 5G+ Fronthaul Using 4-PAM and NOMA-CAP Signals

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