Mapping LO ODU to HO OPU via ODTU Multiplexing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current Optical Transport Network (OTN) technologies are inadequate for mapping Lower Order Optical Channel Data Units (LO ODU) into Higher Order Optical Channel Data Units (HO ODU), particularly for LO ODU with higher bit tolerance, as the conventional asynchronous mapping methods do not meet the required bit error tolerance.
Innovation Solution
A method and apparatus for mapping and de-mapping LO ODU signals into HO ODU by constructing an Optical Channel Data Tributary Unit (ODTU) signal in units of M bytes, encapsulating overhead information, and multiplexing it into the HO OPU, allowing for efficient and universal mapping across different granularities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional asynchronous mapping method is used, then mapping of LO ODU to HO OPU is achieved, but bit error tolerance requirement is not met for high bit tolerance LO ODU
Solution Approach 1:
The patent changes the mapping parameters by introducing a new mapping relationship between LO ODU and HO OPU that specifically addresses bit error tolerance. The mapping parameters are adjusted to ensure that the bit error tolerance requirements are met while maintaining compatibility with existing OTN structures. This involves modifying the mapping rate and synchronization characteristics to accommodate high bit tolerance LO ODU signals.
2Ease of operation
If standard ODUj mapping into OPUk is performed, then asynchronous mapping is achieved, but the adjustment policy of −1/0/+1/+2 does not meet requirements for LO ODU with higher bit tolerance
Solution Approach 1:
The patent modifies the adjustment policy parameters from the conventional −1/0/+1/+2 to a new set of parameters that are specifically designed to meet the bit error tolerance requirements of high bit tolerance LO ODU. This involves changing the mapping rate parameters and synchronization characteristics while maintaining the overall asynchronous mapping framework.
Data Source
AI summary
Methods and apparatuses for mapping processing and de-mapping processing in an optical transport network are provided. A Low Order Optical Channel Data Unit (LO ODU) signal is mapped into a payload area of an Optical Channel Data Tributary (ODTU) signal in units of M bytes. M is equal to the number of time slots of a High Order Optical Channel Payload Unit (HO OPU) that are to be occupied by the ODTU signal, and M is an integer larger than 1. Overhead information is encapsulated to an overhead area of the ODTU signal. Thereafter, the ODTU signal is multiplexed into the HO OPU. According to the application, an efficient and universal mode for mapping the LO ODU to the HO OPU is provided.