Transmission Device Mode Switching with Adaptive Training
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Solution Overview
Problem
Data transmission efficiency decreases when the data transmission mode is changed, requiring temporary stoppage and resynchronization, which involves transmitting invalid data for training processing to correct Data Skew between lanes.
Innovation Solution
A transmission device and reception device that distribute packet data across multiple lanes, allowing data streams to be transmitted and received in parallel, with a control unit that switches to the new mode after executing or skipping training processing based on the type of parameter change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If training processing is executed to correct Data Skew between lanes during mode change, then data synchronization is improved, but data transmission efficiency deteriorates due to temporary stoppage and invalid data transmission
Solution Approach 1:
The system performs training processing in advance before actual data transmission begins. The control unit determines whether training processing is necessary based on the type of parameter change, and if needed, executes training processing using invalid data patterns before switching to normal data transmission mode, ensuring synchronization is established beforehand
Solution Approach 2:
The control unit skips training processing when the changed parameter does not require it (such as when only data width changes), allowing the system to switch modes immediately without executing training processing, thus maintaining high transmission efficiency while still achieving synchronization when necessary
2Reliability
If data transmission is temporarily stopped for resynchronization during mode change, then data synchronization is improved, but transmission efficiency deteriorates due to interruption
Solution Approach 1:
The system performs training processing in advance before actual data transmission begins. The control unit determines whether training processing is necessary based on the type of parameter change, and if needed, executes training processing using invalid data patterns before switching to normal data transmission mode, ensuring synchronization is established beforehand
Solution Approach 2:
The system maintains continuous data transmission flow by using invalid data patterns during training processing instead of stopping transmission entirely. This allows the transmission infrastructure to remain active and ready, enabling a smoother transition to valid data transmission without complete interruption
Data Source
AI summary
The present technology relates to a transmission device, a reception device, a control method, a program, and a transmission and reception system capable of increasing a data transmission efficiency.In a case where a data stream is transmitted in a predetermined mode, and when a parameter that defines content of the mode is changed, the transmission device according to one aspect of the present technology switches transmission of the data stream in the mode defined by the changed parameter is started after training processing for performing data synchronization and correction of a difference between data timings of the lanes by the reception device is executed or is started without executing the training processing according to a type of a parameter to be changed. The present technology is applied to data transmission between chips.