Flexible Optical Service Unit Frame for PON-OTN Interworking
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Solution Overview
Problem
Current passive optical network (PON) systems face high latency due to the need for network processors and traffic management modules to perform forwarding processing and quality of service control, which hinders efficient data transmission between transport and access networks.
Innovation Solution
Implementing a service signal processing method that maps service signals into flexible optical service unit frames, allowing these frames to be transmitted between PON and optical transport network (OTN) systems without the need for parsing, thereby reducing latency and simplifying interworking between the two.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network processors and traffic management modules are used for forwarding processing and quality of service control, then service quality can be managed, but transmission latency increases significantly
Solution Approach 1:
The patent replaces the mechanical processing approach (network processors parsing and managing service signals) with an optical-layer solution. By mapping service signals to flexible optical service unit frames that can be directly transmitted between PON and OTN systems at the optical layer, the system eliminates the need for complex electrical signal processing and protocol conversion, thereby reducing latency while maintaining service quality control capabilities.
2Adaptability or versatility
If protocol conversion is performed between PON and OTN systems, then interoperability is achieved, but transmission latency increases and system complexity increases
Solution Approach 1:
The patent introduces flexible optical service unit frames that serve as a universal container compatible with both PON and OTN systems. These frames can carry service signals directly between the two network types without requiring protocol conversion, enabling seamless interoperability while maintaining low latency. The same frame structure performs the dual function of PON transmission convergence and OTN integration.
Solution Approach 2:
The flexible optical service unit frame acts as an intermediary structure that bridges PON and OTN systems. Instead of converting protocols at the electrical signal level, the patent uses this intermediate frame format to transfer service signals directly at the optical layer, eliminating the need for complex protocol translation and reducing both latency and system complexity.
3Adaptability or versatility
If protocol conversion is performed between PON and OTN systems, then interoperability is achieved, but device complexity increases
Solution Approach 1:
The patent introduces flexible optical service unit frames that serve as a universal container compatible with both PON and OTN systems. These frames can carry service signals directly between the two network types without requiring protocol conversion, enabling seamless interoperability while maintaining low latency. The same frame structure performs the dual function of PON transmission convergence and OTN integration.
4Reliability
If service signals are parsed and processed by network processors, then quality of service control is achieved, but transmission efficiency decreases
Solution Approach 1:
The patent replaces the mechanical processing approach (network processors parsing and managing service signals) with an optical-layer solution. By mapping service signals to flexible optical service unit frames that can be directly transmitted between PON and OTN systems at the optical layer, the system eliminates the need for complex electrical signal processing and protocol conversion, thereby reducing latency while maintaining service quality control capabilities.
Data Source
AI summary
A service signal processing method includes that an optical network unit (ONU) receives a service signal; maps the service signal to a flexible optical service unit frame; and sends a first passive optical network transmission convergence frame to an optical line terminal (OLT), where the flexible optical service unit frame is encapsulated in the first passive optical network transmission convergence frame, and where the flexible optical service unit frame is used to carry the service signal in a passive optical network (PON) and an optical transport network (OTN).