Dynamic Band Transfer for Priority-Based Frequency Sharing
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Solution Overview
Problem
In a band sharing communication system where multiple systems with different priorities operate independently under the FDMA scheme, existing technologies cannot effectively utilize vacant bands due to fixed bandwidths and lack of dynamic allocation, making it impossible to efficiently share frequency bands across systems with varying priorities.
Innovation Solution
A band sharing communication system where a base station or line control device allocates and transfers frequency bands between systems based on priority, allowing vacant bands to be transferred from lower-priority systems to higher-priority systems, enabling efficient band sharing through continuous allocation and disconnection of lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed bandwidth allocation is used in independent systems under FDMA scheme, then system simplicity and independent operation are 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 can transfer frequency bands between systems based on real-time vacancy and demand. The primary system can dynamically acquire vacant bands from the secondary system, and bands can be transferred back when no longer needed, making the allocation flexible rather than fixed.
Solution Approach 2:
The line control device serves multiple functions: it controls both the primary and secondary systems, manages band allocation for both systems, and performs band transfer operations between them. This multi-functional approach enables efficient coordination without requiring separate control devices for each system.
2Productivity
If dynamic band allocation is implemented across priority-based systems, then frequency utilization efficiency is improved by utilizing vacant bands, but system complexity increases due to coordination requirements
Solution Approach 1:
The patent merges the control functions for both primary and secondary systems into a single line control device. This unified control approach simplifies the management of dynamic band allocation by eliminating the need for complex inter-system communication and coordination protocols that would be required if separate control devices were used.
Solution Approach 2:
The line control device acts as an intermediary between the primary and secondary systems, managing all band allocation and transfer decisions. This intermediary role centralizes the complexity of dynamic resource management in a single entity, preventing the proliferation of complex distributed control logic.
3Productivity
If vacant bands are transferred from secondary system to primary system, then frequency utilization efficiency is improved by eliminating vacant bands, but the secondary system's available bandwidth decreases
Solution Approach 1:
The band transfer from secondary to primary system is not permanent but periodic and conditional. When the primary system releases a band (either voluntarily or through suspension), the line control device transfers it back to the secondary system. This periodic exchange ensures that the secondary system regains bandwidth when not needed by the primary system.
Solution Approach 2:
The patent implements a discard-recover mechanism where bands are temporarily discarded from the secondary system when transferred to the primary system, but are recovered and returned to the secondary system when the primary system no longer needs them. This ensures that the secondary system ultimately recovers its full bandwidth allocation.
Data Source
AI summary
A band sharing communication system in which there are an N-ary system and an N+1-ary system in descending order of priority of communication, the systems share frequency bands and allocation of a requested band of a terminal station of each system is performed, includes: occupied band setting means for setting an N-ary occupied band and an N+1-ary occupied band adjacent to the N-ary occupied band; band allocation means for allocating a vacant band of the N-ary occupied band with respect to a requested band of an N-ary terminal station and allocating a vacant band of the N+1-ary occupied band with respect to a requested band of an N+1-ary terminal station; and band transferring means for, when there is no vacant band in the N-ary occupied band with respect to the requested band of the N-ary terminal station, if a vacant band equivalent to the requested band is present in the N+1-ary occupied band such that the vacant band is adjacent to the N-ary occupied band, transferring the vacant band from the N+1-ary occupied band to the N-ary occupied band and allocating the vacant band to the N-ary terminal station, and if communication is being performed in a band in the N+1-ary occupied band which is adjacent to the N-ary occupied band and equivalent to the requested band, transferring a vacant band created by making a suspension request to the N+1-ary terminal station performing the communication from the N+1-ary occupied band to the N-ary occupied band and allocating the vacant band to the N-ary terminal station.