Communication Link Switching for Reliable Remote Control Data
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Solution Overview
Problem
Existing control systems face challenges in ensuring timely transmission and reception of input/output data over networks like the Internet, particularly due to unpredictable network delays, communication congestion, and potential failures in communication channels.
Innovation Solution
A transmission/reception device equipped with a connector and a determiner that establishes and manages communication links over a network. The determiner assesses the state of the communication link and automatically switches to an alternative link when a predetermined state is detected, ensuring continuous and timely data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If control is executed via a network such as the Internet, then flexibility and remote control capability are improved, but communication delay and reliability deteriorate
Solution Approach 1:
The system pre-establishes multiple communication links (primary and alternative links) before control execution is needed. When the primary link fails or experiences delay, the alternative link is already prepared and can be activated immediately, eliminating the need for reactive link establishment and ensuring continuous control operation.
Solution Approach 2:
The system maintains standby communication links as a buffer against primary link failures. These alternative links act as a cushion or safety net, ensuring that control operations can continue without interruption even when the primary communication path experiences problems.
2Reliability
If TCP congestion control or delivery confirmation is used, then data transmission reliability is improved, but communication timing consistency deteriorates
Solution Approach 1:
The system pre-establishes multiple communication links with different characteristics before control execution. By having alternative links prepared in advance with varying transmission characteristics, the system can select the most appropriate link for timing-critical communications without undergoing congestion control delays or delivery confirmation wait times during actual control operations.
3Device complexity
If a single communication link is used, then device complexity is reduced, but communication reliability deteriorates
Solution Approach 1:
The system pre-configures multiple communication links (primary and alternative) with their respective characteristics before they are needed. This preliminary setup allows the control system to have redundant communication paths available without adding complex real-time decision-making logic, as the alternative links are already prepared and characterized.
Solution Approach 2:
The system dynamically selects between primary and alternative communication links based on real-time conditions such as transmission speed, delay, and link status. This dynamic switching capability allows the system to adapt to changing network conditions while maintaining a relatively simple overall architecture, as the selection logic is straightforward (switch to alternative when primary fails or is suboptimal).
Data Source
AI summary
According to the present embodiment, a transmission/reception device includes a connecter and a determiner. The connecter is configured to establish a communication link with a communication counterpart via a network. The determiner is a determiner configured to determine a state of the communication link and to cause the connector to switch the communication link to be another communication link when the communication link is in a predetermined state.