Optical Fiber Replacement Scheduling for Spectrum Efficiency

Solution Overview

Problem

The replacement of standard single-mode optical fibers with ultra-low loss (ULL) optical fibers in backbone networks is labor-intensive and inefficient, leading to reduced spectrum resources and decreased network service capabilities, as current replacement strategies do not optimize the order of fiber link replacement to maximize spectrum utilization.

Innovation Solution

A maximum gain (MG) strategy is employed, which calculates the gain of replacing each optical fiber link by multiplying the reduced frequency slots (FS) by the remaining time for completion, and selects the link with the highest gain for replacement, using an integer linear programming (ILP) model to ensure optimal spectrum resource allocation and optical signal-to-noise ratio (OSNR) management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If optical fiber links are replaced with ULL optical fibers, then transmission capacity and spectrum efficiency are improved, but replacement duration and labor resources increase

Engineering Contradiction:

Improvetransmission capacityVSAvoidreplacement duration

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by calculating the gain of replacing each optical fiber link before actual replacement occurs. The gain calculation considers both the reduced frequency slots and remaining time for completion, allowing the system to plan and prioritize replacements in advance rather than reacting to immediate needs

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamics by using an iterative replacement scheduling method that dynamically adjusts the replacement order based on current network state. The system recalculates gains and selects the next link to replace based on the highest gain criterion, adapting to changing conditions during the replacement process

Inventive Principle:

Principle #15Dynamics

2Productivity

If optical fiber links are replaced with ULL optical fibers, then spectrum efficiency is improved, but network optimization effect deteriorates without proper scheduling

Engineering Contradiction:

Improvespectrum efficiencyVSAvoidnetwork optimization effect

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies feedback by continuously evaluating the gain of each potential fiber link replacement and using this information to adjust the replacement schedule. The system monitors the state of the optical network and modifies the replacement order to maximize spectrum resource savings at each stage

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent implements parameter changes by modifying the replacement sequence based on calculated gain parameters. The gain parameter combines spectrum resource reduction and time factors, and the system changes the replacement order to prioritize links with highest gain, thereby optimizing both spectrum efficiency and network performance

Inventive Principle:

Principle #35Parameter changes

3Productivity

If replacement order is not optimized, then labor resources are wasted, but spectrum resource allocation deteriorates

Engineering Contradiction:

Improvelabor resource efficiencyVSAvoidspectrum resources

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent applies preliminary action by calculating the gain of replacing each optical fiber link before actual replacement occurs. The gain calculation considers both the reduced frequency slots and remaining time for completion, allowing the system to plan and prioritize replacements in advance rather than reacting to immediate needs

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements parameter changes by modifying the replacement sequence based on calculated gain parameters. The gain parameter combines spectrum resource reduction and time factors, and the system changes the replacement order to prioritize links with highest gain, thereby optimizing both spectrum efficiency and network performance

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10911138B2Replacement scheduling method and system for ultra-low loss optical fibers in backbone network

Publication Date: 2021.02.02 JIANGSU SHENYUAN OCEAN INFORMATION TECH & EQUIP INNOVATION CENT CO LTD

AI summary

The invention relaxes to a replacement scheduling method and system for ultra-low loss optical fibers in a backbone network, which are designed to improve spectrum, utilization efficiency. The method includes: S1: calculating a gam respectively after each optical fiber link is replaced, that is, calculating a product of multiplying a quantity of frequency slots (FSs) reduced after each optical fiber link is replaced by a remaining time for finishing replacing all the remaining optical fiber links; S2: selecting an optical fiber link having the highest gain after the optical fiber link is replaced to perform replacement; and repeating S1 and S2 until all the optical fiber links that need to be replaced have been replaced. In the present invention, a replacement order of optical fibers is arranged most appropriately, so as to save as many as spectrum resources for operators for use by additional services. (FIG. 2)