Transmission Frame Mapping for Clock Recovery After Frame Loss
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Solution Overview
Problem
In optical communication, frame loss leads to inaccurate determination of clock information, hindering the recovery of services and reducing communication performance.
Innovation Solution
Transmission frames carry first information indicating the data amount of preceding frames, enabling the receiving device to determine the clock information even in the presence of frame loss, thus allowing reliable service recovery without retransmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiving device determines clock information based on the amount of data carried in received transmission frames, then the service can be recovered from the received transmission frame, but in case of frame loss the receiving device cannot accurately determine the clock information, thereby reducing communication performance
Solution Approach 1:
The transmitting device performs preliminary action by embedding the data amount information of previous transmission frames into the current transmission frame before transmission. This allows the receiving device to have access to the data amount information of lost frames in advance, enabling accurate clock information determination even when frames are lost during transmission.
Solution Approach 2:
The transmission frame serves as an intermediary carrier that transports not only the service data but also the data amount information of previous frames. This intermediary mechanism allows the receiving device to obtain the missing information about lost frames through subsequent received frames, resolving the information loss problem caused by frame loss.
2Reliability
If transmission frames are retransmitted to ensure accurate clock information determination, then communication performance can be improved, but communication delay increases
Solution Approach 1:
The data amount information of previous frames is embedded in advance into subsequent frames during the initial transmission phase. This preliminary inclusion of information eliminates the need for retransmission requests and waiting, allowing the receiving device to determine clock information accurately without incurring additional communication delay.
3Measurement precision
If data amount information of previous frames is carried in transmission frames, then the receiving device can determine clock information accurately even with frame loss, but the transmission frame structure becomes more complex
Solution Approach 1:
The data amount information of previous frames is merged with the current frame's content during the mapping process. By combining multiple pieces of information (service data and data amount information) into a unified transmission frame structure, the patent achieves accurate clock information determination while maintaining a manageable frame structure through systematic organization.
Data Source
AI summary
This application provides a service processing method and apparatus. The method includes: A transmitting device generates a plurality of transmission frames, where an ith frame in the plurality of transmission frames carries first information, the first information is used to indicate an amount of data of a service that is carried in each of t transmission frames, the t transmission frames include an (i−t)th frame to an (i−1)th frame in the plurality of transmission frames, i−t>0, and t≥1; and sends the plurality of transmission frames to a receiving device. A transmission frame carries information about an amount of data of the service that is carried in a transmission frame before the transmission frame.