Optical Telecommunication Network IP Interface Redundancy Reduction

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Solution Overview

Problem

Existing optical telecommunications networks in wavelength division multiplex operation require 100% redundancy of Internet Protocol (IP) interfaces for self-healing, leading to wastage and high costs due to the need for dedicated IP interfaces for both normal and error modes, which do not effectively cover errors at higher-level network nodes or routers.

Innovation Solution

The method involves connecting higher-level network nodes and subordinate network elements via optical transmission links, using a single IP interface for both normal and error modes, with an additional higher-level network node acting as replacement capacity, and employing optical switches to switch between modes, thereby reducing the need for redundant IP interfaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If 100% redundancy of IP interfaces is provided for self-healing in optical telecommunications networks, then reliability is improved, but device complexity and cost increase due to requiring dedicated IP interfaces for both normal and error modes

Engineering Contradiction:
Improveself-healing capabilityVSAvoidIP interface redundancy
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies universality by enabling a single IP interface to perform multiple functions: it serves as the primary interface during normal operation and automatically becomes the backup interface during fault conditions. This multi-functionality eliminates the need for separate dedicated backup IP interfaces, reducing device complexity while maintaining self-healing capability. The control unit manages the interface's dual role by dynamically switching its function based on operational status.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Reliability

If dedicated IP interfaces are provided for error modes, then reliability is improved, but loss of substance increases due to wastage of expensive IP connections

Engineering Contradiction:
Improvefault coverageVSAvoidIP interface wastage
Core Design Contradiction:
ReliabilityVSLoss of substance

Solution Approach 1:

The patent implements discarding and recovering by allowing the backup IP interface to be discarded (deactivated) during normal operation, and then recovered (activated) when fault conditions occur. The single IP interface is discarded as a primary interface during normal operation but recovered as an active backup interface when needed, eliminating continuous wastage of IP connections while ensuring fault coverage is maintained when required.

Inventive Principle:
Principle #34Discarding and recovering

3Reliability

If separate IP interfaces are provided for normal and error modes, then reliability is improved, but ease of operation deteriorates due to manual configuration requirements

Engineering Contradiction:
Improveerror state coverageVSAvoidconfiguration simplicity
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The patent applies self-service by enabling the IP interface to automatically switch between primary and backup functions based on detected fault conditions, without requiring manual reconfiguration. The control unit monitors the operational status and autonomously manages the interface's role, making the system self-configuring and eliminating the need for manual intervention during fault recovery operations.

Inventive Principle:
Principle #25Self-service

4Reliability

If 100% redundancy of IP connections is provided, then reliability is improved, but use of energy increases due to energy-consuming IP connections

Engineering Contradiction:
Improvedata transport resilienceVSAvoidIP connection energy consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic action by having the backup IP interface remain in a dormant, low-energy state during normal operation, and only becoming active periodically when fault conditions are detected. This approach reduces continuous energy consumption associated with maintaining active backup connections, while ensuring that energy-intensive operations occur only when necessary for fault recovery, thus reducing overall energy usage while maintaining data transport resilience.

Inventive Principle:
Principle #19Periodic action

Data Source

PatentEP3261276B1Method for improving efficiency of data transmission in an optical telecommunication network in wavelength multiplex and optical telecommunication network, computer program and computer program product
Publication Date: 2021.12.01 DEUTSCHE TELEKOM AG
  • EP3261276B1 patent drawingFigure 1

AI summary

A method for more efficient data transmission in an optical telecommunications network using wavelength division multiplexing (WDM) of different optical wavelengths is described, wherein the optical telecommunications network comprises a first higher-level network node, a second higher-level network node, and further, a plurality of network elements, wherein the plurality of network elements includes at least one first network element, and wherein the optical telecommunications network comprises an optical transmission path comprising several optical transmission channels.wherein in a normal operating mode of the optical telecommunications network the first higher network node and the first network element are connected to each other by means of an optical transmission channel of the optical transmission link and a first IP interface of the first network element and/or the second higher network node and also the first network element are also connected to each other by means of an optical transmission channel of the optical transmission link and a second IP interface of the first network element, wherein the optical telecommunications network further comprises another higher network node, wherein the method comprises the stepthat in a fault operating mode - instead of the first or second higher-level network node - the further higher-level network node and the first network element are connected to each other via the optical transmission link and either the first IP interface and/or the second IP interface of the first network element.