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In this paper we present a multi-flow transmitter developed within the EU project PANTHER and we evaluate its first proof-of-concept demonstration of up to two single- or dual-polarization optical flows with selectable wavelength, m-QAM modulation format, number of carriers and destination. Multiflow operation is realized by two polymer boards allowing optical carrier management and optional polarization...
Passive optical network FTTH is the best option to guarantee ultra-broadband access and satisfy future-proof user demands. NG-PON2 standardization does not yet consider in a conclusive way the possibility of sharing the same PON among different operators in order to make the network economically sustainable. The Italian research project ROAD-NGN is filling the gap by studying various advanced PON...
Advantages offered by coherent detection systems in access networks are not limited to the increase of power budget due to the superior sensitivity. Channel selectivity is another intriguing feature offered by coherent systems that can be exploited to enable advanced system and network functionalities for access systems. Among them, we focus here on the implementation of filterless optical networks...
We propose and analyze a novel physical layer security scheme with the capability of resisting the chosen plaintext attacks in OFDM data transmission. The proposed security scheme consists of a multiple-fold data encryption based on hyper digital chaos, which provides a huge key space. The first chaotic encryption is applied in the chaotic OFDM subcarrier allocation scrambling, both in time and frequency...
This paper outlines part of the work in the TEROPON project to evaluate the feasibility of developing novel high-speed software-reconfigurable optical transceivers based on Optical Orthogonal Frequency Division Multiplexing (OOFDM) and Digital Filter Multiple Access (DFMA) technologies for Next Generation PONs in the Access Network. It examines the key product requirements, describes some of the experimental...
Next-generation WDM-PON solutions for metro and access systems will take advantage of remotely controlled wavelength-tunable ONUs to keep system costs as low as possible. For such a purpose, each ONU signal can be labeled by a pilot tone modulated onto the optical data stream. We report on the standardization status of this low-cost system in the new ITU-T G.metro draft recommendation, in the context...
The ICT eco-system is constantly growing in traffic demands, with emerging cloud services, mobile and social network technologies to be integrated in 5G networks. New architectural changes at the underlying networks are required to support the traffic volume growth, while providing a high level of dynamic connectivity so that applications are constantly provisioned, released, and moved around. SUNSET...
Long-Reach Passive Optical Networks (LR-PONs) consolidates of metropolitan and access networks by extending the distance between the Central Office (CO) and the end users, which in turn simplifies the network and potentially brings cost savings. With the explosively growing of data traffic, Time and Wavelength Division Multiplexing (TWDM) technology have also been employed in LR-PON to realize high...
5G is currently being investigated and defined while Time-Wavelength Division Multiplexed Passive Optical Networks (TWDM-PONs) and Digital Broadcasting Systems (DBS) are respectively standardised and deployed. Software Defined Networking (SDN) can provide reconfigurability, the stringent latency requirements, adaptive network functionality, and the Quality of Experience (QoE) that a heterogeneous...
The Internet data traffic constant growth caused by the popularization of cloud services, mobile and social networks, is being stressed by the advent of 5G technologies. Hence, architectural changes are required at the underlying networks to support the expected traffic volume growth, whereas providing a highly dynamic connectivity. Cost-effective and energy efficient solutions for flexible network...
In this paper we design a framework for an energy efficient cloud computing platform for Internet of things (IoT) accompanied by a passive optical access network (PON). The design is evaluated using a Mixed Integer Linear Programming (MILP) model. IoT network consists of four layers. The first layer represents IoT objects and the three other layers host relays, the coordinator and the gateway, respectively...
In this research, we analyse the impact of various uncertainty models describing clients' behaviour on optimal FTTH network designs. We introduce the models, optimize the network designs taking into account the introduced models, and evaluate those designs against different plausible scenarios of clients' behaviour. The research is intended to show advantages and weaknesses of various uncertainty...
The new cloud services, the Internet of Things (IoT) and the convergence of mobile and optical networks in the 5G scenario are pushing up the traffic demand over the metro-access networks. Flexible ultra-dense Wavelength Division Multiplexing (udWDM) is a promising technology to address all these new requirements at the metro-access networks. These networks are cost sensitive, so vendors and providers...
Ultra-Dense Wavelength Division Multiplexing (UDWDM) has been proposed for the optical access Passive Optical Network (PON) in the COst-effective COhereNt Ultra-dense-WDM-PON for lambda-To-the-user access (COCONUT) project, introducing the wavelength-to-the-user concept. A low-cost high sensitivity coherent detection technique furnishes high splitting ratios and long-reach extension. ONU coherent...
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