ONT Maintenance Unit for Protocol-Agnostic OAM
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Solution Overview
Problem
Managing and maintaining Optical Network Terminals (ONTs) in Passive Optical Networks (PONs) is cumbersome due to the need to understand and access different protocols used by various hosts connected to ONTs, leading to complex operations and resource inefficiencies, especially when performing configuration, updating, or maintenance actions across a vast number of ONTs with diverse protocols.
Innovation Solution
An Optical Network Termination (ONT) with a maintenance unit that connects to an Optical Line Terminal (OLT) upon receiving a maintenance signal, updates administration information, and then reconnects to a host upon entering operation mode, enabling in-band Operations, Administration, and Maintenance (OAM) capabilities without requiring separate wavelengths or protocol-specific access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If operators access hosts via ONTs to perform maintenance and configuration, then maintenance actions can be performed on ONTs, but the operation becomes cumbersome due to the need to understand and access different protocols used by various hosts
Solution Approach 1:
The patent introduces an intermediary maintenance interface that mediates between the operator and the ONT. This interface translates operator commands into the appropriate protocol-specific commands for the connected host, eliminating the need for operators to understand multiple protocols. The intermediary layer handles protocol conversion and abstraction, making maintenance operations uniform regardless of the underlying host protocol.
Solution Approach 2:
The maintenance interface is designed with universal functionality to handle multiple host protocols through a single unified interface. It can adapt to different protocols (Ethernet, CPRI, etc.) and provide consistent maintenance operations across diverse host types, making the maintenance system multi-functional and protocol-agnostic.
2Ease of operation
If separate control interfaces are provided between ONT and host for maintenance access, then maintenance operations can be performed, but the device complexity increases and the solution does not work for hosts without such interfaces
Solution Approach 1:
The maintenance interface is integrated into the ONT's existing host interface hardware and can operate in multiple modes. It can function as a standard host interface for data transmission and as a maintenance interface for configuration operations, eliminating the need for separate dedicated maintenance hardware while supporting diverse host types including those without native maintenance interfaces.
Solution Approach 2:
The patent merges the maintenance interface functionality with the existing host interface resources. The same physical interface and processing resources are used for both data communication with the host and for maintenance operations, combining multiple functions into a single integrated system rather than requiring separate dedicated interfaces.
3Measurement precision
If OTDR pulses are used to monitor ODN performance, then ODN performance can be measured, but the ONT cannot be monitored or configured through the same mechanism
Solution Approach 1:
The maintenance interface is designed to be universally applicable for multiple purposes. It can handle traditional ODN monitoring functions (including OTDR operations) and simultaneously provide comprehensive ONT configuration, updating, and maintenance capabilities through the same interface, making the system multi-functional rather than requiring separate dedicated systems.
Solution Approach 2:
The patent combines ODN monitoring functions and ONT maintenance functions into a single integrated maintenance interface. The same interface that enables OTDR-based ODN performance measurement also provides the capability to monitor and configure the ONT, merging previously separate functions into one unified system.
4Reliability
If different MAC-based management methods are used for different network protocols, then protocol-specific maintenance can be performed, but the solution becomes client-dependent and not generically applicable
Solution Approach 1:
The maintenance interface acts as a protocol-agnostic intermediary that receives generic maintenance commands and translates them into protocol-specific operations. This mediator layer ensures reliable protocol-specific maintenance while maintaining generic applicability, as the interface itself remains uniform regardless of the underlying host protocol being used.
Solution Approach 2:
The maintenance interface implements universal functionality that works across different network protocols (Ethernet, CPRI, etc.) through a single standardized interface. It provides protocol-independent maintenance operations that are generically applicable to any host type while still enabling protocol-specific maintenance actions through internal protocol translation.
Data Source
AI summary
An ONT and a method therein for maintenance and administration of the ONT are provided. The ONT is comprised in an Optical Distribution Network, ODN. The method comprises connecting 210 an OLT in the ODN to a maintenance unit comprised in the ONT when a first signal is received from the OLT instructing the ONT to enter a maintenance mode. The method comprises updating 220 existing maintenance and administration information in the maintenance unit, the maintenance and administration information relating to the operation of the ONT when receiving new maintenance and administration information from the OLT. The method comprises connecting 230 the OLT to a host which host is connected to the ONT when receiving, from the OLT, a second signal instructing the ONT to enter an operation mode, or after a predetermined period of time; and operating 240 the ONT in accordance with the updated maintenance and administration information in the maintenance unit.