Receiver Network Component Duplicate Telegram Filtering
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Solution Overview
Problem
Existing communication networks in automation systems, particularly those using Parallel Redundancy Protocol (PRP) and High Availability Seamless Redundancy (HSR), face challenges in achieving interoperability between devices from different manufacturers and require complex computational efforts for redundant data transmission, which limits the seamless operation of systems like high-voltage direct current transmission.
Innovation Solution
A receiver network component is designed to check incoming data telegrams for duplicates by using sender identification and sequence numbers, allowing it to process redundant data telegrams from multiple senders efficiently and eliminate duplicates, thereby ensuring interoperability and reducing computational complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data telegrams are redundantly transmitted through multiple independent subnetworks to ensure reliability, then system reliability is improved, but duplicate data telegrams cause increased computational overhead and processing complexity
Solution Approach 1:
The receiver network component performs preliminary duplicate detection by checking incoming data telegrams against previously received telegrams before full processing. This preliminary action identifies and filters duplicate telegrams early in the reception process, preventing unnecessary computational overhead while maintaining the reliability benefits of redundant transmission paths.
2Measurement precision
If sender identifiers and sequence numbers are used to detect duplicates, then duplicate detection accuracy is improved, but device complexity increases due to additional verification steps
Solution Approach 1:
The system uses sender identifiers and sequence numbers as key verification elements without requiring complete analysis of all telegram contents. This partial verification approach achieves sufficient duplicate detection accuracy by focusing on the most distinctive identifying features, thereby reducing the overall verification complexity while maintaining effective duplicate identification.
Data Source
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AI summary
The invention relates to a receiver network component (13) for operation in a communication network (10) of an automation system, wherein the receiver network component (13) is configured to receive redundantly transmitted data telegrams from sender network components (12A-B) of the communication network (10) and to discard duplicates of a data telegram already received.In order to ensure interoperability of network components from different manufacturers, even for device-redundant sender network components (12AB), and to achieve redundant transmission of data telegrams with comparatively little effort, it is proposed that the receiver network component (13) be configured, upon receiving a current data telegram from one of the sender network devices (12A-B), to check whether a data telegram with identical payload has already been received from another sender network component (12A-B), and to further process a data telegram with newly received payload content, and to discard as a duplicate a data telegram with payload that has already been received in a previous data telegram from another sender network component (12A-B).The invention also relates to a communication network and a method for operating a communication network.