Wireless Link Redundancy Switching with Dynamic Modulation
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Solution Overview
Problem
In wireless communication systems that combine time-division multiplex and Ethernet transmissions, securing a stable line quality while efficiently using frequency and reducing economic costs is challenging, especially when using virtual transmission paths with variable modulation methods.
Innovation Solution
A method for redundancy switching in wireless communication systems that dynamically adjusts the number of wireless lines and modulation methods in a virtual transmission path by using a backup line for time-division multiplex transmission, allowing the unused backup line to enhance the virtual transmission path's capacity during no failures and switching to stable modulation for backup line usage during failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a backup line is secured in advance for time-division multiplex transmission, then reliability is improved, but productivity deteriorates due to inefficient frequency usage
Solution Approach 1:
The patent implements dynamic line assignment where backup lines are not permanently reserved but dynamically assigned based on real-time transmission needs. The system monitors transmission status and automatically reassigns lines between Ethernet virtual transmission paths and time-division multiplex backup roles, optimizing frequency usage while maintaining reliability.
Solution Approach 2:
The patent makes wireless lines multi-functional by enabling them to serve dual purposes: acting as active transmission lines for Ethernet virtual paths during normal operation, and switching to backup roles for time-division multiplex transmission when failures occur. This eliminates the need for dedicated backup lines, improving frequency efficiency while maintaining reliability.
2Productivity
If modulation methods are made variable for virtual transmission paths, then productivity is improved through higher data rates, but stability of the object's composition deteriorates
Solution Approach 1:
The patent dynamically changes modulation method parameters based on transmission line conditions and service requirements. Different modulation schemes (QPSK, 16-QAM, 64-QAM, etc.) are selected according to channel quality metrics, enabling high data rates when conditions permit while maintaining stable, robust transmission when channel quality degrades.
Solution Approach 2:
The system implements feedback mechanisms that continuously monitor transmission line quality and automatically adjust modulation methods accordingly. This closed-loop control ensures that modulation parameters are optimized for current conditions while maintaining stability by reverting to more robust schemes when quality deteriorates.
3Reliability
If backup lines are kept unused in preparation for failures, then reliability is improved, but loss of substance increases due to wasted frequency resources
Solution Approach 1:
The patent implements a resource recovery mechanism where wireless lines are not permanently discarded as backup resources but are actively used for Ethernet virtual transmission paths when not needed for time-division multiplex backup. When failures occur, these same lines are recovered and reassigned to backup roles, eliminating resource waste while maintaining failure recovery capability.
Data Source
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AI summary
A receiving apparatus in a wireless communication system that involves both data transmission using a virtual transmission path in which a plurality of wireless lines of which modulation method is variable are virtually consolidated into one, and time-division multiplex transmission, includes a releasing unit that releases, when a failure occurs in a current line used in the time-division multiplex transmission, one wireless line in the plurality of wireless lines constituting the virtual transmission path from the virtual transmission path; a demodulation unit that changes a modulation method used for demodulation of the one wireless line released from the virtual transmission path by the releasing unit to a modulation method used in the time-division multiplex transmission; and a switching unit that switches line connection from the current line in which the failure has occurred to the one wireless line of which modulation method has been changed by the demodulation unit.