Synchronized Master Station Data Update via Token Passing

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Solution Overview

Problem

Conventional data communication systems experience time lags in data updates between master stations, leading to inefficient data processing and longer communication times due to asynchronous data update intervals.

Innovation Solution

Implementing a data communication system where a management master station and a local station update data simultaneously by using token passing with multicast communications, ensuring synchronized data updates and efficient timing management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If each master station performs data update at its own token reception timing, then each station can independently process data, but data updates become asynchronous causing time lags and longer communication intervals

Engineering Contradiction:

Improveindependent data processing capabilityVSAvoiddata update time lag

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The patent merges the data update operations of multiple master stations by having them all update data at the same timing (when the token frame is received from the slave station). This synchronization eliminates the time lags caused by asynchronous updates while maintaining the independent processing capability of each station.

Inventive Principle:

Principle #5Merging (Combining)

2Productivity

If multiple master stations update data independently, then data processing can be distributed, but the update interval becomes long including total processing time of all master stations

Engineering Contradiction:

Improvedistributed data processingVSAvoiddata update interval time

Core Design Contradiction:

ProductivityVSDuration of action of moving object

Solution Approach 1:

The patent combines the data update operations of multiple master stations into a single synchronized timing event. By having all master stations update data simultaneously when receiving the token frame from the slave station, the system achieves distributed processing without the cumulative time penalty of sequential independent updates.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If master stations perform asynchronous data updates, then each station operates independently, but the system cannot complete data communications in short time

Engineering Contradiction:

Improveindependent station operationVSAvoiddata communication speed

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent merges the update timing of all master stations to occur simultaneously at a specific event (token frame reception from slave station). This maintains the independent operational capability of each station while dramatically improving overall communication speed by eliminating sequential processing delays.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS8452843B2Data communication system and data communication device

Publication Date: 2013.05.28 MITSUBISHI ELECTRIC CORP

AI summary

A data communication system performs transmission and reception of data by token passing and updates data by an arithmetic process of data transmitted to and received from a slave station. The data communication system includes a management master station that updates data of slave stations, and a local station that updates data of slave stations. The management master station performs a data update when a token frame destined to the management master station is received, and the local station determines a destination of token frames transmitted from the slave stations, and performs a data update when a destination is the management master station.