Document Type: Article All Authors / Contributors: Chan C.C.K.; Tse K.-H. ISBN: 9781849195393 Language Note: English Unique Identifier: 795212521 Awards:
| Title | : | Novel optical techniques for lightpath tracing and monitoring in all-optical reconfigurable wavelength routing networks |
| Author | : | Chan C.C.K.; Tse K.-H. |
| Language | : | en |
| Rating | : | 4.90 out of 5 stars |
| Type | : | PDF, ePub, Kindle |
| Uploaded | : | Apr 12, 2021 |
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Starts fromanendnode, traverses anumber of λ λ1 λ1 λ1 2 1 3 fibers androuternodes, andends inanotherend node. Λ2 2 4 lightpath figure 17: lightpaths in an optical network.
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A lightpath tracing scheme based on prime-number-encoded tags is proposed for all-optical reconfigurable wavelength routing networks. All traversed network nodes along the lightpath of a received optical packet can be identified at the destination node.
One of the challenges to dynamically set up a lightpath is to develop efficient control schemes in control as well as the management of the distributed-controlled optical networks. In networks with highly dynamic traffic loads, longer lightpath setup time may result in higher blocking probability and serious degradation of the network performance.
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And novel routing techniques and switching node architectures, highly °exible and transparent so-called \wavelength routed all-optical network solutions have emerged. All-optical networks eliminate the restrictions incurred by periodic electronic regen-eration, as signals remain in the optical domain from end-to-end through a lightpath.
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Optical switching occurs within a lightpath and opto-electronic-opto (o-e-o) switching takes place between two consecutive lightpaths. The classical techniques for qos provisioning in ip networks are difficult to apply in all optical networks as there is no optical counterpart to store and forward model that command the use of buffers.
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The novel contribution with respect to [1] is an exper-imental validation of tso for lightpath reassignment in a five-node metropolitan optical network test-bed. We compare the network performance in terms of optical signal-to-noise ratio (osnr) and optical power budget between our tso-based approach and the traditional asynchronous technique.
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Application of topology abstraction techniques in multi-domain optical networks abstract: as dwdm networks proliferate there is a growing need to address the issue of distributed interdomain lightpath provisioning.
Given a deployed wdm network and a set of connection requests as inputs, the rwa problem seeks to optimally assign one lightpath to each request considering two main conditions: (i) every lightpath needs to use the same wavelength throughout its path, and (ii) two lightpaths with the same.
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Lightpath has a predefined backup lightpath on which data can be transmitted if the primary lightpath fails. Protection plans are pre-computed before a failure event, and therefore, it is reasonable to assume that they can be applied even after large-scale failures. Common approaches include 1+1 or 1:1 dedicated protection plans (see [41], [50]).
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To combat the above-mentioned drawback a novel power-aware heuristic called online virtual topology configuration (ovtc) is proposed. In [6] the so-called islb model focuses on energy efficiency issues related to the planning phase of a wdm optical network.
Since the implementation of the techniques for buffering and header processing in op-tical domains is still premature, obs protocols were de-signed to avoid optical buffering and perform fast setup of the end-to-end data lightpath using out-of-band header pro-cessing.
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A single wavelength dovosopm multiplexing (wdm) lightpath using on-off keying (ook) signaling with coherent detection. The overhead associated with this novel method includes monitoring devices at all tons along the lightpath, additional control information about operational status of each ton, and additional transmit power to overcome tap losses.
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In this paper, we propose a novel hybrid optical switching scheme called hylabs (hybrid lightpath and burst switching), which has two implementing schemes including c-hylabs and i-hylabs. Both of the two schemes of hylabs can control the two optical switching techniques ocs and obs together, and adopt the former for normal traffic and the later for overloading traffic.
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In wavelength routing (optical circuit switching), an optical circuit (lightpath) is set up before data are transmitted. The lightpath will be held for the entire duration of the transmission. The selected wavelength is considered occupied, even if there are no data transmitted over the link.
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