Multichannel PON Frame Sequence Number Recovery
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Solution Overview
Problem
In multichannel passive optical networks, existing methods fail to correctly recover the order of data packets due to varying transmission delays across channels, leading to complications in maintaining existing functions and ensuring accurate frame sequence numbering.
Innovation Solution
A method is introduced to add a frame sequence number and delimiter to data packets, either through an encapsulation layer or by splitting packets into segments, allowing for accurate frame start detection and order recovery at the receiving end.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frame sequence number is added to existing Ethernet/EPON/10GEPON frame structure, then order recovery capability is improved, but existing functions are affected and complexity increases
Solution Approach 1:
The patent segments the frame structure by introducing a separate encapsulation layer outside the existing Ethernet/EPON/10GEPON frame structure. The frame sequence number is carried in this new encapsulation layer, which keeps the original frame structure intact and avoids affecting existing functions while adding order recovery capability.
Solution Approach 2:
The patent adds a new dimensional layer (encapsulation layer) beyond the existing frame structure. This dimensional expansion allows the frame sequence number to be carried without modifying the original frame fields, thereby maintaining backward compatibility while enabling order recovery.
2Reliability
If frame sequence number is carried in existing frame header fields, then order recovery is enabled, but frame start detection accuracy deteriorates
Solution Approach 1:
The patent separates the frame start detection function from the order recovery function by placing the frame sequence number in an external encapsulation layer. This segmentation allows the frame start detection to rely on the original frame delimiter (0xd5, 0x55, 0x55) without interference, maintaining detection accuracy while enabling order recovery through the sequence number in the encapsulation layer.
3Reliability
If multiple compensation techniques are applied to implement order recovery, then order recovery capability is improved, but method complexity and feasibility issues increase
Solution Approach 1:
The patent extracts the order recovery function from the complex compensation techniques and implements it through a simple frame sequence number field in the encapsulation layer. This extraction simplifies the solution by removing the need for multiple compensation algorithms and relying instead on direct sequence number comparison for order recovery.
Data Source
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AI summary
Provided are a method, device and system for a bearing frame sequence number of a multichannel passive optical network, and a storage medium. The method includes: adding a frame sequence number and/or a frame delimiter to a multichannel passive optical network data packet or a data packet segment to be transmitted, where the frame sequence number is used for identifying an order for transmitting the multichannel passive optical network data packet or the data packet segment , the frame delimiter is used for identifying a frame start of the multichannel passive optical network data packet or the data packet segment ; and transmitting the multichannel passive optical network data packet or the data packet segment. The technique problem that the multichannel passive optical network data packet or the data packet segment cannot be recovered in order in the existing art of the multichannel passive optical network is solved and the processing efficiency of the multichannel passive optical network data packet or the data packet segment is improved.