Cyclic Communication Data Handling with Period Identification
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Solution Overview
Problem
In cyclic communication systems, devices with different communication speeds may fail to complete data transmission within a period, leading to inefficiencies and the need for high-speed devices to slow down or low-speed devices to be replaced, limiting the system's ability to utilize devices with varying performance capabilities effectively.
Innovation Solution
The system includes a first communication device that transmits data with identification information and target information, allowing the second communication device to discard data if it's not within the current period and process it as an exception, enabling efficient data management across devices with different speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data transmission is performed within each period in cyclic communication, then data synchronization between devices is achieved, but devices with different communication speeds cannot complete transmission within the period
Solution Approach 1:
The patent applies preliminary action by including period information and target information in the transmitted data before the communication cycle completes. This allows the receiving device to pre-process and identify exception data that may arrive in the next period, ensuring proper handling without requiring all devices to synchronize at the same speed. High-speed devices can transmit exception data with advance period markers, and low-speed devices can process this data when received, regardless of whether it arrives in the current or next period.
2Productivity
If high-speed devices operate at full speed, then communication efficiency is improved, but data may not be received within the current period by low-speed devices
Solution Approach 1:
The patent applies dynamics by making the data processing approach flexible based on the arrival time relative to the period. The receiving device dynamically determines whether to process data as current-period data or exception data based on the period information included in the transmitted data. This dynamic handling allows high-speed devices to maintain full operating speed while low-speed devices can process data appropriately whether it arrives in the current or next period, eliminating the need for high-speed devices to slow down.
3Reliability
If all devices communicate at the same speed, then data transmission within each period is ensured, but devices with different performance capabilities cannot be utilized
Solution Approach 1:
The patent applies local quality by treating different types of data differently based on their target information. Normal data follows strict period-based transmission rules, while exception data with target information indicating it may arrive in the next period is handled separately. This allows each device to operate at its natural speed capability - high-speed devices can generate and transmit exception data efficiently, while low-speed devices process data at their own pace - without requiring uniform speed across all devices. The system adapts to local device characteristics rather than imposing a uniform standard.
Data Source
AI summary
A communication system includes a master device and a slave device that perform, at predetermined periods, communication for sharing storage data stored in a cyclic memory. The master device transmits communication data that includes (i) identification information distinguishing a period relating to the communication data from other periods before and after the period and (ii) target information indicating whether the communication data is a target that is to be communicated by the communication at the predetermined periods or is an exception to be excluded from being the target. The slave device discards the received communication data when (i) the target information included in the received communication data indicates that the communication data is the target and (ii) a period indicated by the identification information included in the communication data is different from a current period, and processes the communication data.