TSN Communication Control Using Frame-Transfer Status for Precise Timing
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Solution Overview
Problem
Existing Time-Sensitive Networking (TSN) standards struggle to precisely control the transmission timing and amount of messages due to the inability to consider the status of frames that have already passed through gates, leading to inaccuracies in bus width and buffering processes.
Innovation Solution
A communication device that monitors the status of frames already determined to pass through gates and adjusts transmission timing based on this information, along with back pressure mechanisms to ensure precise control over frame transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gate control lists are used to control transmission timing in TSN networks, then real-time communication capability is improved, but transmission timing precision deteriorates due to inability to consider already-transmitted frame status
Solution Approach 1:
The patent implements a feedback mechanism where the transmission control device monitors the actual transmission status of frames (whether they were successfully transmitted or dropped) and uses this information to adjust subsequent transmission decisions. The determination unit receives transmission status information from the communication unit and uses it to dynamically adjust gate control, thereby achieving precise transmission timing control while maintaining real-time communication capability.
2Productivity
If transmission timing is controlled based on predetermined gate control lists, then network bandwidth utilization is improved, but transmission amount control precision deteriorates
Solution Approach 1:
The system continuously monitors actual transmission outcomes and feeds this information back to the determination unit, which adjusts the amount of data transmitted in subsequent time slots based on what actually succeeded or failed. This dynamic adjustment ensures precise control over transmission amounts while maximizing bandwidth utilization through efficient retry mechanisms.
Solution Approach 2:
The patent transforms the static gate control list approach into a dynamic system where transmission parameters (timing and amount) are continuously adjusted based on real-time feedback. The determination unit dynamically modifies transmission decisions according to actual network conditions and frame transmission status, enabling precise control adaptability.
3Speed
If frames are transmitted without considering bus width variations, then transmission speed is improved, but transmission accuracy deteriorates due to buffering issues
Solution Approach 1:
The determination unit performs preliminary calculations to determine the appropriate transmission amount based on expected bus width conditions before actually transmitting frames. By pre-calculating transmission parameters considering potential bus width variations, the system prepares optimal transmission settings in advance, maintaining high speed while ensuring accuracy through proactive adjustment.
Data Source
AI summary
According to one embodiment, a communication control device includes a transmission control unit and a communication unit. The transmission control unit is configured to control transfer start timing of a first message stored in a queue, based on gate control information. The communication unit is configured to transmit the first message transferred from the transmission control unit in accordance with the transfer start timing. The transfer start timing of the first message is determined based on a transmission cost at a time when a second message, which has been already determined to pass through the gate, is transmitted by the communication unit, and a transfer status of the second message between the transmission control unit and the communication unit.