Signal Transfer Device Window Reservation Control
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Solution Overview
Problem
Existing signal transfer devices face challenges in flexibly reserving windows for multiple flows with different transmission periods, leading to window overlap and resulting jitter in periodic signal transfer.
Innovation Solution
A control device that acquires reference information on transmission amounts and periods for each flow, sets a schedule for window reservations, and instructs the signal transfer device to reserve windows accordingly, preventing overlap and reducing jitter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If windows for multiple flows are reserved in advance in a signal transfer device, then periodic signals can be transferred with suppressed queuing delay, but window overlap occurs when transmission periods differ among flows, causing jitter
Solution Approach 1:
The patent applies dynamics by making the window reservation schedule adaptable and flexible rather than fixed. The control device dynamically adjusts window reservations based on actual transmission periods of periodic signals from multiple flows, allowing the system to respond to varying traffic patterns and prevent overlap while maintaining low queuing delay.
Solution Approach 2:
The patent changes the parameter of window timing by having the control device determine optimal window reservation timings based on the actual transmission periods of periodic signals. This parameter adjustment prevents window overlap that causes jitter while ensuring windows are positioned to minimize queuing delay for periodic signal transfer.
2Device complexity
If a fixed window reservation schedule is used for multiple flows, then simple control is achieved, but flexibility in adapting to different transmission periods is lost
Solution Approach 1:
The patent introduces an intermediary control device that mediates between the periodic signal sources and the signal transfer device. This control device receives transmission period information, determines optimal window reservations, and provides the schedule to the signal transfer device, thereby adding flexibility without complicating the signal transfer device itself.
Solution Approach 2:
The control device performs preliminary action by determining the window reservation schedule in advance based on expected transmission periods. This pre-calculation allows the system to adapt to different flows while maintaining simple operation during actual signal transfer, as the schedule is prepared beforehand.
Data Source
AI summary
The signal transfer device receives a periodically transmitted periodic signal and transfers the periodic signal in a reserved window. A control device that controls a signal transfer device includes a storage device configured to store reference information indicating a transmission amount and a transmission period of the periodic signals of each of a plurality of flows received by the signal transfer device. The control device further includes a processor that executes window setting processing based on the reference information. In the window setting processing, the control device sets a schedule of a plurality of windows for each of the plurality of flows in the signal transfer device based on the reference information, and instructs the signal transfer device to reserve the plurality of windows according to the schedule.