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We have proposed a novel star-ring optical regional network architecture with dynamic wavelength/waveband broadcast and select based on bandwidth reservation. In this network, the large number of wavelength resources generated by a single multi-carrier light source can be shared and utilized in a flexible and simple way. In this paper, a hybrid sta...
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... fiber layer of our proposed network architecture has an overlay star-ring topology, with two RN (Regional Nodes): RNs connecting with each EN (Edge Node) in a star topology and RNr connecting with them in a ring topology respectively, as illustrated in Fig. 1, while the underlying cable layer is still in a classical ring topology. Both RNs and RNr are connected to two PoPs (Point of Proceedings of Asia-Pacific Conference on Communications 2007 1-4244-1374-5/07/$25.00 ©2007 IEEE ...
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Citations
... The remote node connects all optical network units (ONUs) in a star topology, and all ONUs form a ring topology. Based on the MCLS, a star-ring optical regional/metro network was presented in [17,18], which consists of a star part network and a ring part network. The star part network is designed for data transmission and receiving as well as optical carrier distribution, and the ring part network is for network control and protection. ...
... In this way, static, dynamic, and hybrid static-dynamic networks can be implemented according to different network requirements. − The star part network used for data transmission and receiving minimizes the mean hop distance of transmission, and simplifies network control (e.g., switching and routing) [17]. − The resilient star-ring topology enables a fast distributed failure recovery. ...
This article presents a resilient star-ring optical broadcast-and-select network with a centralized multi-carrier light source
(C-MCLS). It consists of a star part network and a ring part network. Optical carriers generated by the C-MCLS are broadcast
to all network nodes, which select and utilize them for data transmission. Optical carrier distribution as well as data transmission
and receiving are performed in the star part network. The ring part network is for fiber failure recovery. The network resilience
property enables the design of a fast distributed failure recovery scheme to deal with single and multiple fiber failures.
We introduce a fiber connection automatic protection switching (FC-APS) architecture that only consists of optical couplers
and 1 × 2 optical switches for each network node. Based on the FC-APS architecture, we design a distributed failure recovery
scheme to recover the carriers and data affected by fiber failures. The fiber failure detection and failure recovery operations
are performed by each network node independently only using its local information. We evaluate the recovery time of the distributed
failure recovery scheme compared with that of the centralized one. Numerical results show that the distributed scheme greatly
reduces the recovery time compared to the centralized configuration in the recoveries of both single and multiple fiber failures.
Optical power loss analysis and compensation of the recovery routes in the distributed scheme are also presented. We show
the required number of optical amplifiers for the longest recovery route in the distributed scheme under different numbers
of network nodes and fiber span lengths.
KeywordsOptical network-Network failure recovery-Multi-carrier light source-Automatic protection switching
This paper reviews the recent progress in high speed optical access networks with emphasis on passive optical network (PON) technologies. Overview of architecture options, key technologies, and main challenges for various systems, such as TDM-PON, WDM-PON, and OFDM-PON, will be discussed. One key factor to enable large scale deployment of next generation high speed PON system is the capability to cost effectively upgrade bandwidth on demand. Hybrid solutions, which combine multiple existing technologies, such as WDM-TDM PON or WDM-OFDM PON, can take advantages of volume effects of mature technologies to increase system bandwidth cost effectively. From practical point of view, hybrid systems are attractive since they can provide a flexible balance between performance and cost to support diversified applications.
This paper presents a resilient star-ring optical broadcast-and-select network with a centralized multi-carrier light source (C-MCLS). It consists of a star part network and a ring part network. Optical carriers generated by the C-MCLS are broadcast to all network nodes, which select and utilize them for data transmission. Optical carrier distribution and data transmission are performed in the star part network. The ring part network is for fiber failure recovery. The network resilience property enables the design of a fast distributed failure recovery scheme to deal with single and multiple fiber failures. We introduce a fiber connection automatic protection switching (FC-APS) architecture that only consists of optical couplers and switches for each network node. We design a distributed failure recovery scheme based on it. The fiber failure detection and failure recovery operations are performed by each network node independently only using its local information. We evaluate the recovery time of the distributed scheme compared with that of the centralized one. Numerical results show that it greatly reduces the recovery time than the centralized one.
