Resilient Intersection-Ring Architecture Featuring Online Expansion and Intersectional Mutual Protection

Li, Xingfeng; Gan, Chaoqin; Liu, Zongkang; Qiao, Hubao; Yan, Yuqi

doi:10.1364/jocn.10.000613

Cited by 12 publications

(11 citation statements)

References 27 publications

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“…These are usually contradictory because the improvement of reliability depends on backing up or sharing the existing resources and thus increasing the additional construction cost. In contrast to previous studies based on pure optical protection [9]- [13], [15], [16], [33], [34], [40], [48] and based on wireless protection [21]- [25], [29], [30], our study can enhance the reliability performance for metro-access optical networks based on the WDM technique while reducing the additional construction cost and the expenditure of each subscriber. For example, previous studies [21]- [23] based on survivable WOBAN architecture have the limitation that they are not suitable for fault scenarios that require recovering significant losses of data, such as a fault in the feeder segment and even a fault in the distribution section of the WDM network.…”

Section: Discussionmentioning

confidence: 86%

“…For the protection of the distribution segment, we set two ONUs belonging to adjacent RNs for each ONU as protective ONUs to recover the affected traffic by utilizing established microwave connectivity when a distribution-fiber fault occurs. This scheme can achieve network reliability of more than 99.9999%, which is superior to that of some existing schemes [9], [10], [12], [13], [15], [33], [40], [48]. Furthermore, in contrast to [11], [16], [30] and [34], the proposed scheme can support protection from more types of faults, including single-fiber faults, dual-fiber faults and multifiber faults.…”

Section: Discussionmentioning

confidence: 89%

“…On the other hand, network reliability of four nines or more cannot be achieved if the full path between the CO and the user is not protected [14]. Therefore, a large and growing body of literature [9]- [13], [15], [16] supporting the protection of the feeder segment concurrently has investigated satisfying the higher reliability requirement of the next-generation optical network. Overall, these schemes focus on the similar aim of developing cost-efficient architecture based on various physical topologies to resist network failures, such as the tree topology [9]- [11], singlefiber ring topology [13], [16], and dual-fiber ring topology [12], [15].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, a large and growing body of literature [9]- [13], [15], [16] supporting the protection of the feeder segment concurrently has investigated satisfying the higher reliability requirement of the next-generation optical network. Overall, these schemes focus on the similar aim of developing cost-efficient architecture based on various physical topologies to resist network failures, such as the tree topology [9]- [11], singlefiber ring topology [13], [16], and dual-fiber ring topology [12], [15]. Among them, the schemes in [12] and [15], based on the dual-fiber ring architecture, can enable flexible switching, thus providing resistance against more types of faults on the feeder segment compared to a tree or singlefiber ring architecture [17], [16].…”

Section: Introductionmentioning

confidence: 99%

“…Overall, these schemes focus on the similar aim of developing cost-efficient architecture based on various physical topologies to resist network failures, such as the tree topology [9]- [11], singlefiber ring topology [13], [16], and dual-fiber ring topology [12], [15]. Among them, the schemes in [12] and [15], based on the dual-fiber ring architecture, can enable flexible switching, thus providing resistance against more types of faults on the feeder segment compared to a tree or singlefiber ring architecture [17], [16]. In these schemes, the complicated optical switch module (OSM) plays a vital role in the protection of the feeder segment.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Highly Reliable Metro-Access Network Based on a Dual-Fiber Ring Architecture and Optimized Protection Mechanisms

Song¹,

Ji²,

Yin³

et al. 2021

IEEE Access

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Network reliability is very important for the next generation of optical networks. In this paper, a highly reliable protection mechanism, which integrates the approaches of optical protection and microwave protection, is proposed for metro-access optical networks based on the wavelength division multiplexing (WDM) technique. By designing a scheme for the convergence of optical and wireless access and cooperating with designed remote nodes (RNs), not only can access for both wired and wireless service be provided simultaneously in each optical network unit (ONU) but also microwave protection can be realized when a failure occurs in a distribution segment. By developing a novel optical switch module (OSM) to cooperate with the dual-fiber ring structure, flexible switching can be achieved to protect against multiple types of failures in the feeder segment, including single-fiber faults, dual-fiber faults and multifiber faults. Based on the above structure, the influence of Rayleigh backscattering (RB) noise can be mitigated when the network is operating under all operating scenarios except for an inner-fiber fault. To further mitigate the influence of noise, optimization for upstream transmission performance is implemented by configuring a reflective semiconductor optical amplifier (RSOA). Furthermore, the feasibility of the overall scheme is verified through experiments and simulations under different operating conditions. The results show that the proposed mechanisms can achieve acceptable bit error rate performance and quality of service (QoS) metrics while also offering various advantages, including high reliability, large scale, and a relatively low cost.INDEX TERMS Fiber fault, Metro-access optical network, Reliability, Protection, Wavelength division multiplexing (WDM).

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Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Highly Reliable Metro-Access Network Based on a Dual-Fiber Ring Architecture and Optimized Protection Mechanisms

Song¹,

Ji²,

Yin³

et al. 2021

IEEE Access

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A novel expandable intersection‐ring architecture supporting optical network units' discretionary peer‐to‐peer communication in metro‐access network

Guo

Gan

Zhan

2022

Int J Communication

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Summary Direct communication between optical network units (ONUs) provides the opportunity to reduce substantial latency among two communicating ONUs, which is very significant for next generation optical networks. In this paper, an expandable intersection‐ring architecture to support direct communication among ONUs is proposed. By adopting two tunable fiber Bragg gratings (FBGs), direct peer‐to‐peer communication of ONUs can be achieved. By utilizing the cyclic routing property of arrayed waveguide grating (AWG), upstream/downstream communication together with direct communication among ONUs can be carried out simultaneously. By adopting intersection‐ring topology, any two adjacent flexible expansion nodes (FENs) on the main ring can be used as intersections to extend a new subring, the scale of the network can be enhanced greatly. Meanwhile, not only the protection of multiple fiber faults can be realized, but also the fault protection of key nodes can be performed. By using a strategy of transmitting signals separately from the top and the bottom branches of the ring, communication efficiency can be improved, transmission latency can be reduced, and fault isolation can be achieved effectively. By the simulation experiment, the effectiveness of the proposed network is demonstrated.

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An architecture based on FDDC between any two ONUs for optical access network

et al. 2022

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A novel architecture with full-duplex direct communications(FDDC) between any two ONUs for optical access network is proposed in this paper. By designing combination switch(CS) ingeniously, the architecture is finished to realize FDDC between any two ONUs in wavelength division multiplexing passive optical networks(WDM-PONs). By utilizing interconnected optical fibers between ONUs, the network has achieved threelevel protections(feeder optical fiber protection, distributed optical fiber protection and interconnected optical fiber protection). By constructing expansion module(EM), the network can be flexibly expanded and optimized, and the CapEx and OpEx of network can be greatly reduced. Finally, by the simulation and analysis, the effectiveness of the proposed architecture is demonstrated.

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Resilient Intersection-Ring Architecture Featuring Online Expansion and Intersectional Mutual Protection

Cited by 12 publications

References 27 publications

Highly Reliable Metro-Access Network Based on a Dual-Fiber Ring Architecture and Optimized Protection Mechanisms

Highly Reliable Metro-Access Network Based on a Dual-Fiber Ring Architecture and Optimized Protection Mechanisms

A novel expandable intersection‐ring architecture supporting optical network units' discretionary peer‐to‐peer communication in metro‐access network

An architecture based on FDDC between any two ONUs for optical access network

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