WSS-Based Wavelength Resource Pooling Across Multiple CO Rings
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Solution Overview
Problem
The existing optical communication networks require a large number of wavelength adding/dropping units and optical subracks, leading to large and complex communication devices that occupy significant space and incur high costs.
Innovation Solution
A communication device incorporating a first wavelength adding/dropping unit and a wavelength selective switch (WSS) that shares a wavelength adding resource pool among multiple CO rings, allowing flexible allocation and scheduling of add wavelength signals to different CO rings, reducing the number of wavelength adding/dropping units and simplifying the network structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each CO ring is assigned a dedicated wavelength adding/dropping unit, then wavelength adding/dropping function is complete for each ring, but the quantity of units increases leading to large device size and high cost
Solution Approach 1:
The patent implements multi-functionality by enabling a single wavelength adding/dropping unit to serve multiple CO rings through the WSS scheduling mechanism. The wavelength adding/dropping unit is no longer dedicated to a single ring but can dynamically serve different rings based on scheduling decisions, thereby reducing the total number of units required while maintaining complete wavelength adding/dropping functionality for each ring.
Solution Approach 2:
The WSS acts as an intermediary component between the wavelength adding/dropping unit and multiple CO rings. It mediates the resource allocation by receiving wavelength adding/dropping signals from the single unit and directing them to different CO rings based on scheduling, enabling one unit to control multiple rings without direct connection to each.
2Reliability
If multiple wavelength adding/dropping units are deployed for different CO rings, then each ring has dedicated resources, but the cabinet size and space occupation increase
Solution Approach 1:
The patent merges multiple wavelength adding/dropping functions into a single unit by introducing the WSS scheduling mechanism. Instead of having separate dedicated units for each CO ring, the system combines multiple ring services into one shared unit, thereby reducing the overall quantity of equipment and the cabinet space required while maintaining dedicated resource allocation through software scheduling.
3Ease of manufacture
If a fixed connection manner with n CO rings corresponding to n wavelength adding/dropping units is used, then wavelength allocation is straightforward, but flexibility for required allocation is limited
Solution Approach 1:
The patent introduces dynamics by replacing the fixed one-to-one correspondence between CO rings and wavelength adding/dropping units with a dynamic scheduling mechanism. The WSS can dynamically allocate wavelength resources to different CO rings based on real-time network demands, enabling flexible wavelength allocation while maintaining the simplicity of the overall architecture through centralized control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces the physical space required for the communication device, simplifies the network structure, and lowers costs by sharing wavelength adding/dropping units across multiple CO rings, while maintaining flexibility and avoiding signal interference.
Implementation Method 1
The first WSS includes a plurality of branch ports, and the first WSS is configured to schedule different add wavelength signals in the wavelength adding resource pool signal to corresponding branch ports based on a configuration
Data Source
AI summary
A communication device and an optical communication network are provided. The communication device includes a first wavelength adding/dropping unit and a first wavelength selective switch WSS. The first wavelength adding/dropping unit is connected to a first common port of the first WSS, and a wavelength adding resource pool signal from the first wavelength adding/dropping unit is input to the first WSS through the first common port. The first WSS includes a plurality of branch ports, and the first WSS is configured to schedule different add wavelength signals in the wavelength adding resource pool signal to corresponding branch ports based on a configuration. The plurality of branch ports are in one-to-one correspondence with a plurality of central office CO site rings, and are configured to transmit corresponding add wavelength signals to the corresponding CO rings.