Optical Route Layout Using Shared 3R Relays for Disaster Backup
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Solution Overview
Problem
The installation of a third optical path route in a three-route optical network structure is costly due to the need for expensive 3R relay devices along the detoured route, which are similar in cost to transponders.
Innovation Solution
An optical path route design device that selects relay stations for a third route, identifies shared 3R-capable units, and optimizes resource allocation to minimize the number of 3R devices by sharing them across multiple routes, reducing the need for individual 3R devices on each route.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a third optical path route is laid by detouring to a remote position to avoid disaster, then route reliability is improved, but installation cost increases due to the need for multiple expensive 3R relay devices
Solution Approach 1:
The patent merges the functions of 3R relay devices across multiple routes by enabling a single 3R device to serve both the third route and either the system-0 or system-1 route during disaster recovery. This consolidation reduces the total number of expensive 3R devices needed from potentially 3-4 devices to just 1-2 shared devices, directly addressing the cost issue while maintaining reliability.
Solution Approach 2:
The patent implements multi-functionality by designing 3R relay devices that can dynamically switch between serving the third route and serving system-0 or system-1 routes. The 3R devices are configured to handle different route assignments based on disaster conditions, allowing one device to perform multiple functions and thereby reducing the total device count and installation cost.
2Reliability
If 3R relay devices are installed along the detoured third route, then signal transmission reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines the operational roles of multiple 3R devices into fewer shared devices. Instead of installing separate 3R devices for each potential route failure scenario, the system uses 3R devices that can be remotely assigned to different routes, merging their functions and reducing overall device complexity and quantity.
Solution Approach 2:
The patent introduces dynamic routing capability where 3R relay devices can be remotely reconfigured to serve different routes based on disaster conditions. This dynamic assignment allows the same physical devices to adapt to different operational scenarios, reducing the need for static, dedicated 3R devices on each route and thereby simplifying the overall system.
Data Source
AI summary
An optical path route design device includes a transmission/reception route selection unit, a candidate selection unit, an existence judgement unit, a maximum resource 3R selection unit, and a new 3R selection unit. The design device selects relay stations in which two transmission/reception end points are arranged, selects a route pair of an active system-0 route and a standby system-1 route, which connects the transmission/reception end points with each other and does not overlap each other, and a backup third route detouring from the route pair via one or more relay stations, and arranges a resource amount of predetermined wavelengths in a shared 3R which is on the third route and shared by a plurality of route pairs.