Optical Module Auto-Negotiation for Wavelength Adaptability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current optical modules for passive optical networks, particularly in TWDM-PON and WDM-PON systems, require complex interactions between optical line terminals (OLT) and optical network units (ONU), limiting their independence and versatility, and cannot be used directly as optical modules in Ethernet switches due to tight wavelength management and allocation controls.
Innovation Solution
An optical port auto-negotiation method that allows optical modules to autonomously select and configure wavelengths through message-based communication, enabling independent operation and use in various network devices by periodically sending and listening for wavelength idle messages, and sending application messages to request and grant wavelength allocations, thus simplifying wavelength management and enabling use in Ethernet switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical modules use fixed wavelength assignment controlled by OLT, then wavelength management is centralized and reliable, but device complexity increases and adaptability decreases
Solution Approach 1:
The optical module autonomously performs wavelength selection and negotiation without requiring complex external control. The module independently detects available wavelengths, negotiates with the OLT, and configures its own operating parameters, thereby improving adaptability while maintaining reliable wavelength management through standardized protocols.
Solution Approach 2:
The optical module transitions from static fixed wavelength assignment to dynamic wavelength negotiation. The module can adaptively select wavelengths based on real-time network conditions and automatically adjust its operating parameters, enabling versatile deployment across different network scenarios while maintaining management reliability through protocol-based coordination.
2Reliability
If optical modules require complex interaction with OLT for wavelength selection, then wavelength allocation is controlled, but ease of operation deteriorates and device complexity increases
Solution Approach 1:
The optical module autonomously performs wavelength detection, negotiation, and configuration without requiring complex manual intervention or sophisticated OLT control procedures. The standardized auto-negotiation protocol enables plug-and-play operation, significantly improving ease of deployment and operation while maintaining reliable wavelength allocation through automated protocol-based coordination.
Solution Approach 2:
The optical module implements bidirectional communication with the OLT through standardized negotiation protocols. The module sends capability information to the OLT and receives wavelength assignment feedback, enabling automated wavelength selection and configuration. This feedback mechanism ensures reliable wavelength allocation while simplifying operation through automated decision-making processes.
3Reliability
If optical modules are designed for specific WDM-PON applications, then performance is optimized for that application, but versatility decreases and cannot be used in other scenarios like Ethernet switches
Solution Approach 1:
The optical module implements a standardized auto-negotiation interface that enables it to operate in multiple network scenarios including WDM-PON, Ethernet switches, and other optical communication applications. The module autonomously adapts to different network types and requirements through protocol-based negotiation, maintaining optimized performance in each application while achieving broad versatility across different deployment scenarios.
Solution Approach 2:
The optical module transitions from static application-specific design to dynamic multi-scenario adaptability. Through automated wavelength negotiation and configuration, the module can adapt its operating parameters to match different network requirements in real-time, ensuring optimized performance whether deployed in WDM-PON, Ethernet switching, or other optical communication applications.
Data Source
AI summary
The present application provides an optical port auto-negotiation method, including: a: selecting a downstream to-be-received wavelength; b: listening to a downstream message on the selected downstream to-be-received wavelength, performing c if a wavelength idle message is received, and returning to a if no wavelength idle message is received within a specified or fixed time, where the wavelength idle message is used to identify that the wavelength is not occupied or not allocated; c: sending a wavelength application message on an upstream wavelength, performing d if a wavelength grant message is received in a downstream direction; otherwise, going back to a or b, where the wavelength application message is used to identify a request for allocation of the wavelength, and the wavelength grant message is used to identify acknowledgment of wavelength allocation; and d: setting an optical port auto-negotiation success flag bit. The present application further provides an optical module.