Bus Subscriber Admission via Release-Gated Packet Forwarding

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Solution Overview

Problem

Existing bus systems face challenges in securely integrating new bus subscribers, particularly those with longer activation times, and in efficiently managing the loading of master modules and ensuring rapid initialization and shutdown.

Innovation Solution

A method for integrating a further bus subscriber into a bus system involves a master module and bus subscribers in series, where intermediate bus subscribers check for system releases, store data packets if necessary, and forward them after revocation, allowing for secure and adaptive integration, reduced master module loading, and automatic system initialization and shutdown.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a bus subscriber with longer activation time is integrated into the bus system, then the system becomes more adaptable, but the initialization time increases

Engineering Contradiction:

Improveintegration of bus subscriberVSAvoidinitialization time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The bus subscriber performs preliminary actions by sending a data packet to log in to the master module before the release is granted, and intermediate bus subscribers store the data packet if the system has already received a release. This preliminary action allows the subscriber with longer activation time to be prepared and integrated without extending the overall system initialization time.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If bus subscribers are admitted to the bus system during production mode, then the system becomes more flexible, but the security decreases

Engineering Contradiction:

Improveadmission flexibilityVSAvoidsystem security

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system applies preliminary anti-action by blocking the admission of new bus subscribers during production mode through the release mechanism. The intermediate bus subscriber stops and stores data packets from subscribers attempting to join during production mode, preventing unauthorized or unprepared subscribers from compromising system security while maintaining flexibility for controlled integration when release is granted.

Inventive Principle:

Principle #9Preliminary anti-action

3Ease of operation

If the master module processes all login requests from bus subscribers, then the system becomes more centralized, but the master module loading increases

Engineering Contradiction:

Improvecentralized controlVSAvoidmaster module loading

Core Design Contradiction:

Ease of operationVSPower

Solution Approach 1:

Intermediate bus subscribers act as mediators by checking whether the bus system has already received a release and storing data packets when necessary. This intermediary function filters and manages login requests before they reach the master module, reducing the processing load on the master module while maintaining centralized control through the release mechanism.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Stability of the object's composition

If bus subscribers wait for predefined period of time to check for login, then the system becomes more stable, but the initialization time increases

Engineering Contradiction:

Improvesystem stabilityVSAvoidwait time

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

The system implements feedback through the release mechanism that notifies bus subscribers whether they can be admitted. Instead of using fixed predefined wait times, bus subscribers receive real-time feedback about system readiness, allowing them to attempt login immediately when release is granted. This eliminates unnecessary waiting time while maintaining system stability through controlled admission.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS11803495B2Method for allocating addresses to a plurality of bus subscribers in a bus system that includes a master module and bus system having a master module and a plurality of bus subscribers

Publication Date: 2023.10.31 SEW EURODRIVE GMBH & CO KG

AI summary

A method for integrating a further bus subscriber into a bus system, and a bus system, having a master module and subscribers disposed in series, includes the temporally consecutive method steps: in a first method step, the further bus subscriber transmits a data packet to the master module in order to log in to the master module, in a second method step, a bus subscriber disposed between the further bus subscriber and the master module stops the data packet and checks whether the bus system has already received a release, in a third method step, the first bus subscriber forwards the data packet to the master module if the bus system has not yet received a release, or in a third, in particular an alternative, method step, if the bus system has already received a release, the bus subscriber stores the data packet and waits until the release of the bus system is revoked and after the release has been revoked, forwards the stored data packet to the master module.