Communication System Time Synchronization Correction Value Update
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Solution Overview
Problem
In communication systems employing the traffic bonding scheme, errors occur in updating the correction value of time synchronization packets when a failure happens in the wireless transmission path, leading to incorrect delay calculations due to double addition of delay amounts in secondary devices.
Innovation Solution
The system introduces a line monitoring unit to determine communication presence or absence in the first transmission path and adjusts the communication processing unit to either divide or not divide packets based on this determination, ensuring accurate delay calculations by adding actual or set delay values accordingly, and utilizing secondary devices to update correction values without double counting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the traffic bonding scheme is applied to improve transmission capacity and reliability, then the system can transmit data via multiple wireless lines and maintain communication during path failures, but errors occur in updating correction values of time synchronization packets due to double addition of delay amounts in secondary devices
Solution Approach 1:
The patent segments the transmission paths into a first transmission path (direct wireless connection between primary devices) and a second transmission path (via secondary devices). This segmentation allows different delay compensation methods to be applied to each path type, preventing double counting of delay amounts while maintaining both path options for reliable communication.
Solution Approach 2:
The patent applies different quality characteristics to different transmission paths: the first path uses actual measured delay amounts for correction value updates, while the second path uses predetermined delay amounts. This local differentiation ensures accurate correction values are updated only when appropriate, preventing errors while maintaining communication reliability through path diversity.
2Adaptability or versatility
If time synchronization packets are divided and transmitted via multiple paths to improve fault tolerance, then communication continues during wireless path failures, but delay amounts are double added in secondary devices causing correction value errors
Solution Approach 1:
The patent segments packet transmission into two modes: division for the first transmission path (enabling path switching and fault tolerance) and undivided transmission for the second transmission path (preventing double delay addition). This segmentation allows the system to adapt to different transmission conditions while preserving correction value integrity.
Solution Approach 2:
The patent introduces a determination unit as an intermediary that decides whether to divide packets based on transmission path conditions. This intermediary controls the packet transmission method to ensure that delay amounts are not double counted, thereby maintaining correction value accuracy while still enabling path switching capability through the first transmission path.
3Speed
If the first transmission path is used for direct wireless communication to reduce hops, then transmission speed is improved, but single point of failure risk increases when wireless connection fails
Solution Approach 1:
The patent segments the transmission system into a first transmission path (direct wireless, higher speed) and a second transmission path (via secondary devices, lower speed but higher reliability). This segmentation allows the system to use the faster direct path when available while automatically switching to the backup path through secondary devices when wireless connection fails, thus maintaining both speed and reliability.
Data Source
AI summary
In order to provide a communication system and the like which are capable of updating a correction value of a time synchronization packet, and to which a traffic bonding scheme is applied, a set of primary devices of the communication system determines presence or absence of communication in a first transmission path, adds an actual measurement value of a first delay amount to an information value when a determination result according to the determination is that the communication is present, or adds, to the information value, a design value of a second delay amount being the delay amount inside the wireless transmission device and the wireless reception device when the determination result is that the communication is absent.