Optical cross-connect system incorporated with newly developed operation and management system

Shiragaki, T.; Henmi, N.; Kato, Tomoaki; Fujiwara, M.; Misono, Masatoshi; Shiozawa, Takahiro; Suzuki, Shuji

doi:10.1109/49.725188

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…A Unidirectional Path Switched Ring (UPSR) that uses dedicated protection is referred to as a Dedicated Protection Ring (DPRing). A two-fiber DPRing uses one fiber as the working fiber and the other fiber as the protection fiber [6,8]. To increase the capacity of transmission, the protection fiber can also be used as working line that is employed in OXADM ring network [5].…”

Section: Ring Restoration Schemementioning

confidence: 99%

“…Currently telecommunication networks widely employ wavelength division multiplexing (WDM) in single-mode optical fiber to interconnect discrete network locations and offer high capacity, high speed and long reach transmission capabilities [1,6]. Normally in wavelength routed networks, switching is performed through optical add/drop multiplexer (OADM) and optical cross connect (OXC) nodes.…”

Section: Introductionmentioning

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: Ring Restoration Schemementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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 filters then need to have a hitless tuning capability. Hitless tuning requires that other (express) wavelength channels remain undisturbed (on the granularity of single bits) at all times before, during, and after the reconfiguration of an add-drop filter from an initial wavelength to a target wavelength or to an off state [17,18]. A general approach to hitless tuning entails providing a means of substantially disabling both the amplitude and phase response of an add-drop filter in the through-port (and possibly also in the add-drop ports), tuning the center wavelength in the off state, and reactivating the filter at the target wavelength.…”

Section: Hitless Switching and Tuning Of Microphotonic Filtersmentioning

confidence: 99%

Silicon photonics for compact, energy-efficient interconnects [Invited]

et al. 2007

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͑Doc. ID 74779͒ The goal of the research program that we describe is to break the emerging performance wall in microprocessor development arising from limited bandwidth and density of on-chip interconnects and chip-to-chip (processor-tomemory) electrical interfaces. Complementary metal-oxide semiconductor compatible photonic devices provide an infrastructure for deployment of a range of integrated photonic networks, which will replace state-of-the-art electrical interconnects, providing significant gains at the system level. Scaling of wavelength-division-multiplexing (WDM) architectures using high-indexcontrast (HIC) waveguides offers one path to realizing the energy efficiency and density requirements of high data rate links. HIC microring-resonator filters are well suited to support add-drop nodes in dense WDM photonic networks with high aggregate data rates because they support high Q's and, due to their traveling-wave character, naturally support physically separated input and drop ports. A novel reconfigurable, "hitless" switch is presented that does not perturb the express channels either before, during, or after reconfiguration. In addition, multigigahertz operation of low-power, Mach-Zehnder silicon modulators as well as germanium-on-silicon photodiodes are presented.

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“…Among these functions, protection switching is currently implemented at higher (electronic) layers, such as SONET/SDH, ATM, and IP [5], [6]. The recent availability of optical add and drop multiplexers (OADMs) and optical crossconnects (OXCs) [7] offers, however, a new dimension to make high-speed connections survivable. The advantages of providing a resilience mechanism at the optical layer include [8], [9]:…”

Section: Introductionmentioning

confidence: 99%

Optimal design of survivable mesh networks based on line switched WDM self-healing rings

Fumagalli

Cerutti

Tacca

2003

IEEE/ACM Trans. Networking

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Abstract-Network survivability provided at the optical layer is a desirable feature in modern high-speed networks. For example, the wavelength division multiplexed (WDM) self-healing ring (or SHR/WDM) provides a simple and fast optically transparent protection mechanism against any single fault in the ring. Multiple self-healing rings may be deployed to design a survivable optical mesh network by superposing a set of rings on the arbitrary topology. However, the optimum design of such a network requires the joint solution of three subproblems: the ring cover of the arbitrary topology (the RC subproblem); the routing of the working lightpaths between end node pairs to carry the offered traffic demands (the WL subproblem); and the provisioning of the SHR/WDM spare wavelengths to protect every line that carries working lightpaths (the SW subproblem). The complexity of the problem is exacerbated when software and hardware requirements pose additional design constraints on the optimization process.The paper presents an approach to optimizing the design of a network with arbitrary topology protected by multiple SHRs/WDM. Three design constraints are taken into account, namely, the maximum number of rings acceptable on the same line, the maximum number of rings acceptable at the same node, and the maximum ring size. The first objective is to minimize the total wavelength mileage (working and protection) required in the given topology to carry a set of traffic demands. The exact definition of the problem is given based on an integer linear programming (ILP) formulation that takes into account the design subproblems and constraints and assumes ubiquitous wavelength conversion availability. To circumvent the computational complexity of the exact problem formulation, a suboptimal solution is proposed based on an efficient pruning of the solution space. By jointly solving the three design subproblems, it is numerically demonstrated that the proposed optimization technique yields up to 12% reduction of the total wavelength mileage when compared to solutions obtained by sequentially and independently solving the subproblems. The second objective is to reduce the number of wavelength converters required in the solution produced by the ILP formulation. Two approaches are proposed in this case that trade the required wavelength mileage for the number of wavelength converters.

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Optical cross-connect system incorporated with newly developed operation and management system

Cited by 10 publications

References 11 publications

Survivability in Metro Ring Network Using Oxadm

Survivability in Metro Ring Network Using Oxadm

Silicon photonics for compact, energy-efficient interconnects [Invited]

Optimal design of survivable mesh networks based on line switched WDM self-healing rings

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