Advanced Line Encoding Frame Recovery for Burst Transmission Links
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Solution Overview
Problem
Existing interconnection protocols, such as MIPI UFS, face challenges in achieving high-speed data transmission with low power consumption while effectively handling frame errors and symbol alignment issues, particularly with the 8b/10b coding scheme's inefficiencies.
Innovation Solution
Implementing an advanced line encoding (ALE) scheme with reduced overhead, such as 128b/129b or 256b/257b coding, and incorporating error handling mechanisms like lane alignment patterns and negative acknowledgement control (NAC) frames to facilitate improved data transmission and error recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If 8b/10b coding scheme is used, then DC balance is achieved, but effective data rate is reduced by 20% overhead
Solution Approach 1:
The patent changes the coding parameters from traditional 8b/10b (8 data bits to 10 transmitted bits) to advanced line encoding schemes such as 128b/130b or 256b/260b, where the ratio of data bits to transmitted bits is improved (e.g., 128/130 = 98.46% or 256/260 = 98.46% effective data rate). This parameter change reduces overhead from 20% to approximately 1.54% while maintaining DC balance through modified encoding rules that ensure equal distribution of transitions.
2Productivity
If advanced line encoding mode is used, then data transmission efficiency is improved, but frame error handling complexity increases
Solution Approach 1:
The patent incorporates lane alignment patterns at the beginning of each burst transmission in advanced line encoding mode. These pre-transmitted alignment sequences enable the receiver to synchronize and align its data lanes before actual data transmission begins, automatically handling potential misalignment issues without requiring complex error detection and correction mechanisms during data transmission.
Solution Approach 2:
The patent implements Negative Acknowledgement Control (NAC) frames that provide feedback mechanisms for error handling. When frame errors are detected in advanced line encoding mode, the receiver sends NAC frames to request retransmission, creating a feedback loop that manages error handling systematically rather than requiring complex real-time correction algorithms.
3Reliability
If burst transmission is closed and reopened in response to error events, then error recovery is enabled, but transmission latency increases
Solution Approach 1:
The patent prepares lane alignment patterns in advance and keeps them ready for immediate transmission when burst errors occur. When an error event triggers burst closure and reopening, the pre-prepared alignment patterns can be quickly re-transmitted without requiring complex real-time generation, minimizing the time penalty associated with error recovery while ensuring reliable resynchronization.
Data Source
AI summary
A method for facilitating frame error handling and an electronic device are provided. The method is for use in an electronic device capable of communicating with another electronic device. The method comprises the following. In response to an error event in an advanced line encoding mode, closing a first burst transmission and opening a second burst transmission are performed, wherein the advanced line encoding mode indicates that the electronic device is capable of data transmission by using an advanced line encoding having an improved effective data rate as compared to 8b/10b encoding. A lane alignment pattern is transmitted in the advanced line encoding mode from the electronic device to the other electronic device after the second burst transmission is opened. A negative acknowledgement control frame is transmitted in the advanced line encoding mode from the electronic device to the other electronic device after the lane alignment pattern is transmitted.