Optical-layer multipath protection for optical network

An optical network and link technology, applied in the field of optical networking, can solve problems such as high processing costs, high power consumption, complex control and management algorithms, etc., and achieve the effect of reducing excessive resource construction

Active Publication Date: 2014-12-24
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, intermediate processing requires data processing, which results in high processing costs per unit of business, high power consumption, and complex control and management algorithms
Another shortcoming is that VCAT / LCAS requires granular services in small containers, so that services can be flexibly merged and separated at intermediate nodes

Method used

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  • Optical-layer multipath protection for optical network
  • Optical-layer multipath protection for optical network
  • Optical-layer multipath protection for optical network

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Embodiment Construction

[0022] Embodiments disclosed herein provide a resilient multipath provisioning scheme for split-spectrum optical networks. Split spectrum is a new solution for elastic optical networking. In a split-spectrum optical network, traffic can be split into multiple sub-signals at the source node by a traffic distributor. All sub-signals of the same primary service are designated as Separation Groups (SG). By separating services, non-contiguous spectrum segments can be more effectively utilized to accommodate the small spectrum requirements of sub-signals, and constraints on long-distance transmission can be relaxed.

[0023] Split-spectrum optical networking allows resilient multipath provisioning at the optical layer through optical bypass and protocol transparency at intermediate nodes. The traffic distributor at the source node determines the bandwidth distribution mode for elastic purposes. The distribution mode specifies the primary and backup traffic on each sub-signal unde...

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Abstract

A multi-path provisioning scheme is provided to ensure full protection while reducing or minimizing resource overbuild. A signal to be provisioned is divided at a source node into a plurality of sub-signals that are independently routed from the source node to a destination node. Bandwidth for back-up traffic B is allocated in addition to bandwidth for primary traffic T. In some embodiments, the initial bandwidth B of the backup traffic equals the bandwidth of the primary traffic. The T+B traffic is initially distributed so that no link carries more than B traffic. The traffic distribution pattern is then iteratively revised to reduce the bandwidth requirements for the backup traffic while still meeting requirements for protection.

Description

[0001] priority statement [0002] This application claims priority under 35 U.S.C. §119(e) to U.S. Provisional Patent Application 61 / 621888, filed April 9, 2012, which is incorporated herein by reference. technical field [0003] The present invention relates generally to optical networking, and more particularly to optical layer multipath protection in optical networks. Background technique [0004] The development of optical switching equipment and the use of Dense Wavelength Division Multiplexing (DWDM) has led many service providers to replace optical ring networks based on SONET (Synchronous Optical Network) and SDH (Synchronous Digital Hierarchy) protocols with optical mesh networks . The large bandwidth capacity of optical networks makes them ideal for high-speed data applications, and the use of DWDM allows the aggregation of many channels onto a single optical fiber. Thus, a single failure within the network can result in massive data loss and can affect many use...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H04J14/02
CPCH04J14/0298
Inventor夏鸣S. 达尔富特
OwnerTELEFON AB LM ERICSSON (PUBL)