Optical Line Terminal Line Identifier Allocation for ONT Replacement
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Solution Overview
Problem
In optical communication networks, existing technologies face challenges in maintaining service continuity and managing optical network terminals (ONTs) without separate setting changes when ONTs are replaced, as they rely on serial numbers that can change, leading to disruptions in service settings.
Innovation Solution
The solution involves allocating line identifiers based on line lengths from each port of an optical line terminal (OLT) to the connected ONTs, managing terminal connection information using line identifiers, and calculating line lengths from measured propagation distances, which allows for seamless service maintenance even with ONT replacements by mapping new serial numbers to existing identifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If serial numbers are used to identify optical network terminals, then terminal identification is achieved, but service continuity is disrupted when terminals are replaced
Solution Approach 1:
The patent introduces line identifiers as an intermediary element between the OLT and ONTs. Instead of directly using ONT serial numbers for service identification, the system uses line identifiers that remain constant regardless of terminal replacement. This intermediary layer ensures service continuity while allowing flexible terminal replacement.
Solution Approach 2:
The patent creates a mapping relationship where line identifiers serve as persistent copies or proxies for service settings. When an ONT is replaced, the new terminal inherits the line identifier and associated service settings from the previous terminal, effectively copying the service configuration without requiring reconfiguration.
2Ease of operation
If separate service settings are configured for each optical network terminal, then service customization is achieved, but management complexity increases during terminal replacements
Solution Approach 1:
The patent segments the service configuration into two parts: line identifiers that remain stable and are managed centrally, and terminal-specific information that changes with replacement. This segmentation allows the OLT to manage only the stable line identifier mappings while terminals handle their own identification, reducing overall management complexity.
Solution Approach 2:
The system enables self-service by allowing new ONTs to automatically inherit service settings through the line identifier mapping mechanism. When a terminal is replaced, the new terminal automatically receives the appropriate service configuration through the existing line identifier without requiring manual reconfiguration by network operators.
3Reliability
If line identifiers are allocated based on line lengths, then service continuity is maintained during terminal replacement, but additional measurement and calculation processes are required
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing line length information and propagation distance data during initial network setup. These pre-computed values are stored in the OLT's database, so when terminal replacement occurs, the system can quickly retrieve and match line identifiers without performing real-time measurements or calculations, thus maintaining efficiency.
Data Source
AI summary
Disclosed is network management technology for an optical line terminal. The optical line terminal allocates a line identifier according to a line length from each port to an end thereof. Terminal connection information is managed such that a corresponding line identifier is mapped to a measured line length to an optical network terminal. Service settings for an optical network terminal are managed by the line identifier.