Colorless-Light and Tunable-Light-Source Schemes for TWDM and WDM PONs

Zhang, Zhiguo; Chen, Yanxu; Cai, Shanyong; Zhang, Bingbing; Zhang, Min; Chen, Xue

doi:10.1109/mcom.2018.1700751

Cited by 14 publications

(11 citation statements)

References 14 publications

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“…Such optical sources are usually referred to as agnostic or colorless. 12 The immediate choice for these sources would be tunable lasers, where each device can be readily fine-tuned to the desired wavelength. To this end, multi-section DFB lasers have been proposed.…”

Section: Double-rsoa Colorless Wdm-ponmentioning

confidence: 99%

“…However, if WDM‐PON is to become a serious contender for the standardization of the 5G fronthaul, OPEX costs must be reduced. Specifically, since each cell site operates at a distinct wavelength, it is necessary to develop colorless optical sources, where, by colorless , we mean that the same hardware must be able to provide any wavelength required by the network operator 12 . The most obvious colorless optical sources are tunable lasers, such as multi‐section distributed feedback (DFB) lasers 13 and vertical‐cavity surface emitting lasers (VCSELs) 14 .…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, since each cell site operates at a distinct wavelength, it is necessary to develop colorless optical sources, where, by colorless, we mean that the same hardware must be able to provide any wavelength required by the network operator. 12 The most obvious colorless optical sources are tunable lasers, such as multi-section distributed feedback (DFB) lasers 13 and vertical-cavity surface emitting lasers (VCSELs). 14 Although quite promising, these technologies are still under development, making them difficult to implement in low-cost optical networks.…”

Section: Introductionmentioning

confidence: 99%

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Double‐RSOA colorless WDM‐PON for 5G fronthaul applications

Souza

Plazas

Celino

et al. 2022

Trans Emerging Tel Tech

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The introduction of 5G mobile systems poses significant challenges to the design of the fronthaul structure. The dense coverage, comprising several small cells operating in the millimeter‐wave range, with an enormous number of antennas, makes conventional digital‐radio‐over‐fiber unfeasible. On the other hand, the centralized architecture of the optical fronthaul is well‐suited for the passive optical network (PON) topology, with WDM‐PON as a strong contender due to its capability to establish logical point‐to‐point optical links to each cell site. However, the large‐scale deployment of WDM‐PON requires the availability of colorless transmitters, where the same hardware is able to generate any wavelength needed by the network. In this context, this paper investigates an analog fronthaul configuration over a colorless WDM‐PON for 5G and beyond, employing the techniques of self‐seeding in the downlink and carrier reuse in the uplink. We numerically evaluated the EVM when transmitting 1.25 Gbps at 3.5 GHz and 10 Gbps at 26 GHz in a 20 km optical link. The results are within the 3GPP requirements, demonstrating the feasibility of the proposed fronthaul.

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Section: Double-rsoa Colorless Wdm-ponmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Double‐RSOA colorless WDM‐PON for 5G fronthaul applications

Souza

Plazas

Celino

et al. 2022

Trans Emerging Tel Tech

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“…The RN is implemented as a simple passive power splitting element, and each remotely deployed optical receiver is fitted with a tunable optical filter [25]. This option simplifies C-RAN service delivery/overlay with currently deployed PON, but is detrimental to the achievable power budget compared to Option 1 -limiting the potential for network scaling.…”

Section: Rn Option IImentioning

confidence: 99%

A Silicon Photonic Switching Platform for Flexible Converged Centralized-Radio Access Networking

Browning

Cheng

Abrams

et al. 2020

J. Lightwave Technol.

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“…The NG-PON2 adopts colorless tunable ONU transceivers in order to reduce the computational effort for ONU digital hardware, support the wavelength channels to simplify network operation, reduce installation cost, and keep the maintenance efforts under control [33,34]. The colorless ONU (or source-free ONU) is a wavelength-independent ONU which cannot decide when to upload a channel network, hence the central office dynamically assigns these colorless ONU to individual wavelength [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Global P2P BitTorrent Real-Time Traffic Over SDN-Based Local-Aware NG-PON2

et al. 2022

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File sharing is one of the most common uses in Peer-to-peer (P2P) networks and structured P2P systems, such as BitTorrent (BT), which may overcome the limitations of features such as improved scalability, efficiency, and deterministic data location. Recent research has attempted to reduce inter-ISP P2P traffic by including locality awareness into neighborselection strategies of popular P2P apps, which prioritize adjacent peers over distant peers when transferring data, reducing server bandwidth burden, and inter-ISP traffic expense. However, the locality awareness P2P exchanged, handled and coordinated by the network infrastructure to turn around traffic as nearest as possible to the end users was proposed for the passive optical network (PON) because of the large amount of bandwidth in only one single fiber. The PON offers many system architectures; in particular, the NG-PON2 with colorless ONUs, adopting time and wavelength division multiple access technology is often recognized as the best access network solution for simplifying network operation, lowering installation costs, and maintenance costs under control. Software-defined networking (SDN) has sparked interest in various fields as a viable research topic, promising better agility, improved automation, security, and lower capital and operating costs. Taking advantage of the SDN's OpenFlow protocol in NG-PON2, centralized control renders more flexible control over the BT traffic (P2P intratraffic) file sharing application provided by different ISPs. Finally, we evaluated our proposed scheme in real-time traffic share collected by Sandvine's report on 2020 despite the Covid-19 pandemic for different geographic regions, for example; Global, APAC, EMEA, and AMERICA.

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Colorless-Light and Tunable-Light-Source Schemes for TWDM and WDM PONs

Cited by 14 publications

References 14 publications

Double‐RSOA colorless WDM‐PON for 5G fronthaul applications

Double‐RSOA colorless WDM‐PON for 5G fronthaul applications

A Silicon Photonic Switching Platform for Flexible Converged Centralized-Radio Access Networking

Global P2P BitTorrent Real-Time Traffic Over SDN-Based Local-Aware NG-PON2

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