Bus Telegram Segmentation for Secure High-Rate Slave Communication
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Solution Overview
Problem
Existing methods for secure communication between a master and a slave in industrial bus systems, such as those using Fail Safe over EtherCAT, reduce data exchange rates and lack flexibility, requiring shutdowns for configuration changes and storing encoded data, which limits operational efficiency and flexibility.
Innovation Solution
A method that structures telegrams with a first region containing a predefined instruction and a second region filled with a free instruction, allowing for secure and flexible communication without pre-storing the free instruction, enabling quick operation and configuration changes without system shutdowns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encoded data regions with predefined instructions are used in telegrams, then security is improved, but data exchange rate deteriorates
Solution Approach 1:
The telegram is divided into multiple regions: a first region containing a predefined instruction (encoded for security) and a second region containing free instructions (flexible for data exchange). This segmentation allows different parts of the telegram to serve different purposes - the first region ensures security through encoding while the second region enables efficient data exchange without pre-stored encoding requirements.
2Reliability
If encoded data regions are used in telegrams, then security is improved, but flexibility deteriorates
Solution Approach 1:
The telegram structure separates encoded predefined instructions from unencoded free instructions. The first region with predefined instructions maintains security through encoding, while the second region with free instructions provides flexibility for real-time configuration changes without requiring system shutdowns or pre-stored encoding data.
Solution Approach 2:
The system transitions from a static configuration where all data must be pre-encoded to a dynamic system where the second region allows real-time modification of instructions. This enables the bus system to adapt to changing requirements during operation while maintaining security in the first region.
3Reliability
If encoded data regions are used in telegrams, then security is improved, but device complexity deteriorates
Solution Approach 1:
The telegram is segmented into a first region with predefined encoded instructions and a second region with free unencoded instructions. This reduces device complexity by eliminating the need to pre-store encoding data for all possible instructions, while maintaining security through encoding in the first region.
Data Source
AI summary
A method for secure communication between a master and a slave of a bus system includes exchanging a telegram between the master and the slave. The telegram has a first region and a second region. The first region contains a predefined instruction. The second region is filled at least in part with a free instruction. A communication system and a system or an industrial system are also provided.