| 1. |
- Cen, M., et al.
(författare)
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A full monitoring scheme for long-reach TWDM PONs
- 2015
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Ingår i: Asia Communications and Photonics Conference, ACPC 2015. - Washington, D.C. : OSA. - 9781943580064
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Konferensbidrag (refereegranskat)abstract
- We propose a simple system that realizes for the first time full monitoring functionality for long-reach PON. Theoretical analysis and experimental validation demonstrate the proposed scheme is capable of providing accurate fault localization.
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| 2. |
- Cen, M., et al.
(författare)
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Advanced Transmission-Reflection-Analysis (TRA) system for Long-Reach Passive Optical Network monitoring
- 2015
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Ingår i: International Conference on Transparent Optical Networks. - : IEEE Computer Society. - 9781467378802
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Konferensbidrag (refereegranskat)abstract
- Long-Reach Passive Optical Networks (LR-PONs) allows for extending the distance between the central office (CO) and end users from a few kilometers to several tens of kilometers and beyond. It in turn reduces the number of active equipment in the field, bringing potentially cost saving. However, due to its high capacity and large coverage, LR-PON becomes increasingly vulnerable to various failures. Therefore, network monitoring becomes extremely important to guarantee an appropriate level of network reliability and performance. In this paper, we report on an advanced LR-PON monitoring solution that can supervise the whole LR-PON ring section in a cost-effective manner. Instead of using the conventional optical time domain reflectometry (OTDR) approach, we implement multi wavelength Transmission-Reflection Analysis (nλ-TRA) as the monitoring technique. The TRA approach is based on the unique relationship between the optical powers transmitted and backscattered by the fiber for a given loss location. Since TRA only requires measuring the power levels of monitoring signals, it outperforms other conventional methods thanks to its superior detection speed and a simple system configuration. Both experimental results have demonstrated that the proposed system can reach high accuracy for fault localization.
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| 3. |
- Cen, M., et al.
(författare)
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Efficient monitoring for ring-based long-reach passive optical networks
- 2015
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Ingår i: Optical Fiber Communication Conference, OFC 2015. - Washington, D.C. : The Optical Society. - 9781557529374
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Konferensbidrag (refereegranskat)abstract
- An efficient monitoring scheme based on transmission-reflection analysis is proposed for long-reach passive optical networks. Both experimental simulation results have demonstrated that the proposed scheme provides better localization functionality than the conventional methods.
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| 4. |
- Cen, M., et al.
(författare)
-
Fast and simple fault monitoring for long-reach passive optical networks
- 2014
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Ingår i: 2014 European Conference on Optical Communication, (ECOC). - : IEEE. - 9782954944401 ; , s. 6964070-
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Konferensbidrag (refereegranskat)abstract
- We propose a fast and simple monitoring system based on multi-wavelength bi-directional transmission reflection analysis approach for long-reach passive optical networks. Both experimental and simulation results have demonstrated the proposed system can reach high accuracy for fault localization.
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| 5. |
- Cen, M., et al.
(författare)
-
Full monitoring for Long-Reach TWDM Passive Optical Networks based on TRA technique
- 2016
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Ingår i: International Conference on Transparent Optical Networks. - : IEEE Computer Society. - 9781509014675
-
Konferensbidrag (refereegranskat)abstract
- 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 capacity. However, due to high capacity and large coverage, the presence of a single failure may cause a huge loss of data and affect a large number of subscribers in LR-PON. Efficient network fault monitoring therefore becomes a key to improve the level of network reliability. In this paper, we report an advanced solution realizing fault detection, identification and localization in both feeder and distribution fiber segments of TWDM LR-PON. Instead of using the conventional optical time domain reflectometry (OTDR) approach, we implement multi wavelength Transmission-Reflection Analysis (nλ-TRA) as the monitoring technique, which is able to provide a good spatial accuracy and a high detection speed without interfering with the data traffic. Theoretical analysis and experimental validation demonstrate that the proposed scheme is capable of providing an accurate fault monitoring functionality.
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| 6. |
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