Line Control Device Dynamic Band Transfer for FDMA Systems
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Solution Overview
Problem
In a band sharing communication system where multiple independent systems with different priorities operate under the FDMA scheme, the fixed bandwidth and lack of dynamic resource allocation hinder effective utilization of vacant bands, making it impossible to efficiently share frequency bands between systems with varying priorities.
Innovation Solution
A band sharing communication system where a primary system with higher priority and a secondary system with lower priority share frequency bands, with a base station or line control device allocating vacant bands by setting occupied bands, transferring vacant bands from the secondary system to the primary system when needed, and suspending secondary system communications to allocate bandwidth to primary system terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed bandwidth allocation is used in FDMA scheme, then system simplicity is maintained, but frequency utilization efficiency deteriorates due to inability to utilize vacant bands
Solution Approach 1:
The patent implements dynamic band allocation where the line control device continuously monitors vacant bands and reallocates them based on current system needs. The occupied bands are no longer fixed but dynamically adjusted through band transfer processes, allowing the system to adapt to changing conditions and eliminate idle frequency resources while maintaining operational simplicity.
Solution Approach 2:
The system changes the allocation parameters of frequency bands by transferring occupied bands from lower priority systems to higher priority systems when vacant. This parameter change in band allocation enables the system to optimize frequency utilization without fundamentally altering the FDMA structure or increasing system complexity.
2Stability of the object's composition
If vacant bands cannot be reallocated, then allocation stability is maintained, but band utilization efficiency deteriorates due to persistent idle bands
Solution Approach 1:
The line control device implements a feedback mechanism that continuously monitors the status of frequency bands, identifying vacant bands and systems requiring additional bandwidth. Based on this feedback, the device automatically transfers occupied bands to appropriate systems, ensuring both stable operation and efficient utilization without requiring complex reconfiguration.
3Productivity
If distributed arrangement in frequency domain is used, then vacant band utilization improves, but system complexity increases due to non-continuous allocation requirements
Solution Approach 1:
The patent segments the frequency spectrum into distinct occupied bands that can be independently transferred and reallocated. This segmentation allows vacant bands to be identified and transferred as discrete units to systems needing bandwidth, achieving efficient utilization while maintaining manageable system complexity through structured band management.
4Productivity
If priority-based band sharing is implemented, then primary system performance improves, but secondary system availability deteriorates due to band transfers
Solution Approach 1:
The system implements periodic monitoring and evaluation of band utilization, transferring occupied bands from secondary to primary systems only when genuinely vacant and when primary system performance requires additional bandwidth. This periodic assessment ensures that secondary system availability is maintained unless absolutely necessary to prioritize primary system performance.
Data Source
AI summary
In a band sharing communication system in which there are a primary system and a secondary system in descending order of priority of communication, the systems share frequency bands, and a base station or a line control device performs allocation of a requested band of a terminal station of each system, the base station or the line control device includes: occupied band setting means for setting a primary occupied band and a secondary occupied band adjacent to the primary occupied band; band allocation means for allocating a vacant band of the primary occupied band with respect to a requested band of a primary terminal station and allocating a vacant band of the secondary occupied band with respect to a requested band of a secondary terminal station; and band transferring means for, when there is no vacant band in the primary occupied band with respect to the requested band of the primary terminal station, if a vacant band equivalent to the requested band is present in the secondary occupied band such that the vacant band is adjacent to the primary occupied band, transferring the vacant band from the secondary occupied band to the primary occupied band and allocating the vacant band to the primary terminal station, and if communication is being performed in a band in the secondary occupied band which is adjacent to the primary occupied band and equivalent to the requested band, transferring a vacant band created by making a suspension request to the secondary terminal station performing the communication from the secondary occupied band to the primary occupied band and allocating the vacant band to the primary terminal station.