PON to OTN Wavelength Conversion for Network Integration
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Solution Overview
Problem
The integration of GPON and OTN networks is challenging due to differences in frame formats and functionalities, leading to difficulties in network integration and high costs associated with short transport distances and limited user coverage, requiring separate configuration of numerous OLTs.
Innovation Solution
A system and method that enables signals in a PON frame format to transparently pass through an OTN by converting upstream and downstream optical signals between PON and OTN formats using specific modules for mapping and encapsulation, allowing seamless transport and termination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GPON and OTN networks are integrated using conventional methods, then network functionality is achieved, but integration difficulty increases and operation maintenance costs rise
Solution Approach 1:
The patent introduces a wavelength conversion device as an intermediary component between GPON and OTN networks. This device converts optical signals from GPON wavelength to OTN wavelength, enabling seamless integration without direct complex interaction between the two different network systems. The intermediary handles protocol and format differences, simplifying the overall integration architecture.
Solution Approach 2:
The patent segments the network integration function into distinct modules: GPON network segment, wavelength conversion segment, and OTN network segment. Each segment operates independently with standardized interfaces, allowing the complex integration problem to be divided into manageable parts that can be configured and maintained separately.
2Area of stationary object
If separate OLTs are configured for short transport distances, then network coverage is achieved, but the number of OLTs increases and costs rise
Solution Approach 1:
The wavelength conversion device serves multiple functions: it acts as a bridge between GPON and OTN networks, provides wavelength routing, and enables long-distance transport. This multi-functional device replaces what would otherwise require multiple separate OLT configurations, reducing the total number of active optical line terminals needed in the network.
Solution Approach 2:
The patent extends the network from short-distance spatial coverage to long-distance wavelength-domain coverage. By utilizing wavelength conversion, the same physical infrastructure can serve both short-range GPON access and long-range OTN backbone functions, effectively adding a wavelength dimension to the network architecture that eliminates the need for additional OLTs.
3Ease of operation
If GPON signals are directly transmitted without wavelength conversion, then transmission simplicity is maintained, but transport distance is limited
Solution Approach 1:
The patent replaces the physical limitation of optical fiber transmission distance with a wavelength conversion mechanism. Instead of extending the physical reach of GPON signals through more powerful transmitters or better fibers, the system substitutes wavelength conversion to bridge distance gaps, maintaining transmission simplicity while overcoming physical constraints.
Data Source
AI summary
A system for transporting signals through PON, including a device for transporting optical network signals and a device for transporting optical line signals, wherein: the device for transporting optical network signals is adapted to map upstream optical signals with a PON frame format to upstream optical channel data unit signals, to convert into upstream signals with an optical channel transport unit format, and to transport to the device for transporting optical line signals through OTN; and to perform corresponding downstream processing; the device for transporting optical line signals is adapted to convert the upstream signals into upstream optical channel data unit signals, to de-map to upstream optical signals with a PON frame format, and to transport to an optical line terminal; and to perform corresponding downstream processing. The invention further discloses relevant devices and methods.