Aperiodic Signal Transfer Scheduling for Low-Latency Priority Output
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Solution Overview
Problem
Existing signal transfer technologies, such as Time Aware Shaper (TAS), are ineffective for aperiodic signals and cause delays when higher-priority aperiodic signals are transmitted, as they cannot be transmitted until lower-priority periodic signals are completed.
Innovation Solution
A signal transfer device and method that includes a reception unit, buffers, a timing calculation unit, and a control unit to predict the arrival time of aperiodic signals, allowing preferential transmission by reserving transmission periods for these signals, thereby reducing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If Time Aware Shaper (TAS) is applied to control periodic signals with priority, then transmission delay for periodic signals is reduced, but aperiodic signals cannot be transmitted and experience delay
Solution Approach 1:
The patent extends the static TAS mechanism to a dynamic system that can handle both periodic and aperiodic signals. The control unit dynamically adjusts transmission timing based on signal characteristics, using prediction units to forecast aperiodic signal arrivals and reserve transmission slots accordingly, making the system adaptable to diverse signal patterns while maintaining low delay performance
Solution Approach 2:
The patent implements preliminary action by having prediction units forecast the arrival timing of aperiodic signals before they actually arrive. The control unit then reserves transmission slots in advance based on these predictions, ensuring that aperiodic signals can be transmitted immediately upon arrival without causing delay, while still maintaining the structured transmission schedule for periodic signals
2Reliability
If complete priority control is performed for periodic signals, then transmission priority is ensured for periodic signals, but aperiodic signals with higher priority cannot be transmitted until periodic signals complete
Solution Approach 1:
The patent transforms the rigid complete priority control into a dynamic mechanism that evaluates signal types and priorities in real-time. The control unit dynamically determines transmission order by considering both periodic and aperiodic signal characteristics, allowing higher-priority aperiodic signals to interrupt or share transmission opportunities with periodic signals, thus eliminating unnecessary delays while maintaining reliable priority control
Solution Approach 2:
The patent applies preliminary action by having prediction units forecast aperiodic signal arrivals and the control unit reserve transmission slots in advance. This allows the system to prepare transmission resources before high-priority aperiodic signals arrive, enabling them to be transmitted immediately without waiting for periodic signals to complete, thus reducing delay while maintaining priority control
3Stability of the object's composition
If transmission slots are reserved for periodic signals, then periodic transmission is ensured, but aperiodic signals experience delay waiting for slot availability
Solution Approach 1:
The patent makes the transmission schedule dynamic by allowing real-time adjustment based on actual signal arrivals. The control unit monitors both periodic and aperiodic signals and flexibly reallocates transmission slots as needed, maintaining the stability of periodic transmission while creating opportunities for aperiodic signals to be transmitted without excessive waiting time
Solution Approach 2:
The patent implements preliminary action by having prediction units forecast aperiodic signal arrivals and the control unit reserve transmission slots in advance. This proactive approach allows the system to prepare transmission resources before aperiodic signals arrive, reducing their waiting time while still maintaining the scheduled periodic transmission pattern
Data Source
AI summary
A signal transfer device according to an embodiment receives a plurality of signals including an aperiodic signal having a higher priority than other signals, respectively holds the plurality of received signals by a plurality of buffers according to the priority, acquires signal information including at least one of a time at which the aperiodic signal is transmitted or received and a data length of the aperiodic signal, predicts a timing at which the aperiodic signal arrives at the buffer based on the acquired signal information, sets reservation of a period for transmitting the aperiodic signal with priority over other signals based on the predicted timing, controls the plurality of buffers to output the aperiodic signal with priority over other signals in the period in which the reservation is set, and transmits the signal output by the buffer.