Demonstration and field trial of a resilient hybrid NG-PON test-bed (original) (raw)
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SARDANA: an all-optical access-metro WDM/TDM-PON
2011
A new optical access network, named "Scalable Advanced Ring-based passive Dense Access Network Architecture" (SARDANA), is presented. It transparently integrates WDM metro and TDM PON access technologies, implementing ring protection, 100 km reach and up to 1024 users served at 10 Gb/s, with passive highly-shared infrastructure. The introduced innovations are hybrid ring/tree WDM/TDM Passive Optical Network (PON) architecture; a resilient remote node (RN), which is distantly pumped from the Optical Line Terminal (OLT); and a reflective ONU (Optical Network Unit); as well as an enhanced Medium Access Control (MAC) protocol.
Test-bed functionality of the SARDANA Hybrid NG-PON
… Networks and In- …, 2011
The tests with broadband multimedia services of the SARDANA multi-layer prototype prove the feasibility of scalable hybrid DWDM/TDM-PON FTTH networks with resilient optically-integrated ring-trees architecture.
The architecture of a ring based TDM PON to improve survivability and robustness
2013 National Conference on Communications (NCC), 2013
With the advent of fiber-to-the home (FTTH), fiber-to-the-curb (FTTC) and fiber-to-the-building (FTTB) as part of a access network solutions in recent times, the network service providers have started deploying tree based passive optical networks (PONs). However these PONs might not be enough to satisfy the need of scalability and the survivability of the network. In this paper, we propose the use of "Variable Optical Power Splitter" (VOPS) in the Remote Node of a ring based EPON. The transmitted power entering this passive VOPS can be adjusted depending on the distance from an optical line terminal and the number of users required at a particular remote node which ensures the ease of scalability of the network. On the other hand, the ring architecture provides extra protection to enhance the overall survivability of the network. Finally, we provide a detailed calculation of the network availability for the proposed network while maintaining the user data delivery quality in terms of BER as well as the power budget.
Key Technologies of WDM-PON for Future Converged Optical Broadband Access Networks [Invited
Journal of Optical Communications and Networking, 2009
The wavelength-division-multiplexed passive optical network (WDM-PON) is considered to be the next evolutionary solution for a simplified and future-proofed access system that can accommodate exponential traffic growth and bandwidth-hungry new applications. WDM-PON mitigates the complicated time-sharing and power budget issues in time-division-multiplexed PON (TDM-PON) by providing virtual point-to-point optical connectivity to multiple end users through a dedicated pair of wavelengths. There are a few hurdles to overcome before WDM-PON sees widespread deployment. Several key enabling technologies for converged WDM-PON systems are demonstrated, including the techniques for longer reach, higher data rate, and higher spectral efficiency. The cost-efficient architectures are designed for single-source systems and resilient protection for traffic restoration. We also develop the integrated schemes with radio-over-fiber (RoF)-based optical-wireless access systems to serve both fixed and mobile users in the converged optical platform.
The segmentation of networks in domains limits the scalability of future Internet mainly due to the need for complex packet and protocol processing. To alleviate this shortcoming, convergence has been recognized as a requirement for the realization of the future information transport infrastructure which will be capable to transfer not only the continuously increasing data volumes but also to efficiently and transparently support new networking schemes. In this paper we address transparent core-access integration, proposing an integrated control plane for optical access and core networks. The proposed control plane can lead to a unified transport infrastructure integrating state-of-the-art optical components and technologies while emphasis has been placed on the traffic grooming capabilities. The proposed control mechanism is evaluated using computer simulations.
A new protection scheme for a combined ring-star based hybrid WDM/TDM PON architecture
2012 Ieee International Conference on Advanced Networks and Telecommunciations Systems, 2012
In this paper we propose a hybrid WDM/TDM PON architecture that utilizes a combined ring-star based connectivity to provide shared protection against optical line terminal (OLT) failure. We have further proposed an appropriate control mechanism governed by a proposed MAC protocol to reduce the protection switching time. We calculated the approximate reach of the proposed network. We have evaluated the availability figures of the network service per end-user subject to different failure scenarios within the proposed network architecture along with its associated capital expenditure (CAPEX) per user. Finally we have demonstrated that our proposed architecture provides a significant cost benefit over 1:1 protection scheme for achieving almost the same value of network availability.
Capacity and Delay Analysis of Next-Generation Passive Optical Networks (NG-PONs
Building on the Ethernet Passive Optical Network (EPON) and Gigabit PON (GPON) standards, Next-Generation (NG) PONs ( ) provide increased data rates, split ratios, wavelengths counts, and fiber lengths, as well as ( ) allow for all-optical integration of access and metro networks. In this paper we provide a comprehensive probabilistic analysis of the capacity (maximum mean packet throughput) and packet delay of subnetworks that can be used to form NG-PONs. Our analysis can cover a wide range of NG-PONs through taking the minimum capacity of the subnetworks forming the NG-PON and weighing the packet delays of the subnetworks.