Communication Apparatus Image Packet Segmentation for PTP Synchronization
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Solution Overview
Problem
In systems where multiple communication apparatuses are daisy-chained, the transmission of high-priority PTP packets is delayed due to the need to wait for the completion of large image data transfers, leading to synchronization delays and reduced accuracy.
Innovation Solution
A communication apparatus divides image packets into smaller packets during PTP packet transmission, allowing for concurrent transfer of both image and control data, thereby reducing synchronization delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If image data is transmitted as a large communication packet, then transmission efficiency is improved, but transmission of high-priority PTP packets is delayed
Solution Approach 1:
The communication apparatus segments the large image data packet into multiple smaller packets for transmission. This allows the transmission medium to handle multiple packets in sequence, enabling high-priority PTP packets to be inserted and transmitted between image data packets, thereby reducing PTP packet delay while maintaining efficient image data transmission through batched packet sending
2Measurement precision
If PTP packet transmission is prioritized, then synchronization accuracy is improved, but image data transmission efficiency deteriorates
Solution Approach 1:
The communication apparatus dynamically adjusts transmission priorities based on packet type. When a PTP packet needs to be transmitted, the system temporarily interrupts ongoing image data packet transmission to send the PTP packet first, ensuring synchronization accuracy. After PTP packet transmission, the system resumes image data transmission, maintaining overall transmission efficiency through adaptive priority management
3Productivity
If image data transfer is continuous, then transmission efficiency is improved, but PTP packet transmission delay increases
Solution Approach 1:
The communication apparatus implements periodic transmission cycles for image data packets, creating natural transmission intervals. During these intervals, PTP packets can be transmitted without causing delay. The system alternates between image data transmission phases and PTP packet transmission phases, ensuring both continuous overall data flow and timely synchronization packet delivery
Data Source
AI summary
A communication apparatus that performs time synchronization using a received time synchronization packet includes a division unit configured to, in a case where an image packet to be transferred to a different communication apparatus exists during a period during which the time synchronization packet is to be transmitted, divide the image packet into a plurality of divided image packets, and a transfer unit configured to transfer the plurality of divided image packets to the different communication apparatus.