Optical cross-connect systems for restoration of backbone fiber networks

Tsushima, Hiroaki; Sano, Hiroyasu; Kitajima, S.; Sawada, Yasuji; Kanetake, T.; Hayashi, Yukio; Kakizaki, Sunao; Fukashiro, Y.; Nakata, Toshihiko; Hanatani, S.; Robinson, N.; Davis, G.B.; Fee, John; Liu, S.-K.

doi:10.1109/ofc.1998.657390

Cited by 14 publications

(16 citation statements)

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“…In 1+1 dedicated protection, a variable splitter and a selector switch are used while in 1:1 dedicated protection, switches are used on both the transmitter and the receiver side. The signal in working path will be dropped and then re-added to protection path in the same direction with the previous path [3,4].…”

Section: Conventional Ring Network Structurementioning

confidence: 99%

“…Normally in wavelength routed networks, switching is performed through optical add/drop multiplexer (OADM) and optical cross connect (OXC) nodes. These nodes provide provisioning capabilities as well as protection and restoration at the optical layer [1,3,6]. This can be implemented by using two fibers connection; the first fiber in the working line and the second fiber in the protection line [4].…”

Section: Introductionmentioning

confidence: 99%

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Survivability in Metro Ring Network Using Oxadm

Ab-Rahman

Shaari

2017

AJSTD

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The optical cross add and drop multiplexing (OXADM) node described in this paper increases the capacity, flexibility and reliability of the trunk-line optical network used for data communication. It features two different bandwidths which operate in working and protection line in a ring configuration. The OXADM has the same features of the conventional OADM node but with more efficiency and reliability. The OXADM prototype system focuses on providing survivability through restoration against failures, such as cable/fiber cut in optical layer with ring topology. Two types of restoration scheme have been proposed to ensure data flow continuously by means of linear/ multiplex protection and ring protection. Comparison between OXADM and OADM restoration schemes is also described. The BER characteristics were measured at 2.5 Gbps (OC-48) and small degradation was observed, as confirmed by a comparison of these simulation results with those obtained from systems without restoration element. Restoration schemes in OXADM node are more reliable and efficient compare to conventional device due to internally routing mechanisms and no 'drop and re-add function' is needed to route the signal to alternative path or processed the signals in both electronic and optical domain as practice in conventional nodes today.

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Section: Conventional Ring Network Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Survivability in Metro Ring Network Using Oxadm

Ab-Rahman

Shaari

2017

AJSTD

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“…These architectures based in the majority on the tree architecture are issued from the IUT-T G984.1 recommendation [5] . In the first configuration fiber duplex architecture, a spare fiber is equipped between the OLT and the splitter coupler.…”

Section: Non Secured Pon Architecturesmentioning

confidence: 99%

Protection for an Immediate Split Structure of Tree-Based EPON Architecture-Ideal Condition Analysis

Ab-Rahman¹,

Aziz²,

Jumari³

2009

American J. of Engineering and Applied Sciences

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Problem statement: Ethernet Passive Optical Network (EPON) was proposed to overcome the bandwidth bottleneck at the Access Networks due to its simplicity, cost effective and wide spread deployment. A failure in access networks can cause serious problems, because access network transmit aggregated high speed traffic from hundreds of subscribers. Protection and restoration mechanisms have been applied in backbone networks, but access networks are not considered significantly in the scope of survivability. Approach: In this study, we proposed a cost effective protection scheme for a novel tree-based EPON architecture. Immediate Split Structure (ISS) means the signal was totally split after pass through the first optical splitter. This was the second proposal method after first suggestion using Optical Cross Add and Drop Multiplexer (OXADM) as a restoration switch. In this study we used only 2 × 2 and 2 × 1 optical switches combination to divert the traffic to the alternative path. Three faulty conditions were considered in this research and OptiSystem, Inc software was used to prove the solution feasibility. Results: The Bit Error Rate (BER) performances were measured by a 1.25 Gb sec −1 Non-Return-to-Zero (NRZ) pseudo random binary sequence (PRBS) with a pattern length of 2 31-1 for the downstream traffic between the OLT and 8 ONUs. Our results were obtained by observing bit error rates, eye diagrams and optical power levels in ideal condition. Conclusion: The survivability of EPON is necessary to provide seamless services and ensure network reliability. Single failure in the line connected will activate dedicated protection while shared protection was activated when both fiber (working and standby fiber) are breakdown. We analyzed the system in ideal condition to prove the system feasibility.

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“…OXC-based optical node is selected as a node distribution in the mesh network while OADM-based optical node is suitable for use in ring topology network (Tsushima et al 1998). The selection of types of nodes depends on several factors such as signal movement format, its main function and also the security scheme used.…”

Section: Introductionmentioning

confidence: 99%

Flexible Topology Migration in Optical Cross Add and Drop Multiplexer in Metropolitan Ring Network

Ab-Rahman¹

2012

Journal of Computer Science

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Problem statement: Optical Cross Add and Drop Multiplexer (OXADM) is a recently invented optical networks device. Approach: A design with a purpose to combine the operational concepts of Optical Add-Drop Multiplexer (OADM) and Optical Cross Connect (OXC) has been developed. It is developed by studying the drawbacks in existing devices and with some excellence features added. OXADM is introduced to increase the survivability in the ring network. With the 'Accumulation' feature and 'U' turn reflection enable the multiplex, linear and ring protection scheme activated to ensure the signal arrives at the customer although breakdown occurs in the line and optical node. Beside that with the new features, the topology migration can also be done without the restructuring process due to randomly growth of new nodes. Results: The result shows that; network performance is similar without need a modification on components. Conclusion: Output power and BER performance at different node in ring and mesh optical network are shown to show the achievement of objective.

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Optical cross-connect systems for restoration of backbone fiber networks

Cited by 14 publications

References 1 publication

Survivability in Metro Ring Network Using Oxadm

Survivability in Metro Ring Network Using Oxadm

Protection for an Immediate Split Structure of Tree-Based EPON Architecture-Ideal Condition Analysis

Flexible Topology Migration in Optical Cross Add and Drop Multiplexer in Metropolitan Ring Network

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