Base Station Channel Setting for Carrier Aggregation Harmonic Interference
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Solution Overview
Problem
Carrier aggregation in wireless communication systems leads to significant degradation in reception sensitivity due to harmonics of transmission signals overlapping with reception signals in different frequency bands, which existing technologies fail to effectively prevent.
Innovation Solution
A method and apparatus for setting communication channels in a base station that employs carrier aggregation, which involves determining and avoiding overlaps between the frequency ranges of harmonics of an uplink frequency range in one frequency band and the downlink frequency range in another frequency band by searching for and resetting available channels to prevent harmonic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is implemented at multiple frequency bands to enable simultaneous transmission and reception, then communication bandwidth and data rate are improved, but reception sensitivity significantly degrades due to harmonic overlap
Solution Approach 1:
The base station performs preliminary determination of harmonic frequency ranges before finalizing channel allocation. By calculating potential harmonic overlaps in advance and selecting downlink channels that avoid these ranges, the system prevents reception sensitivity degradation before it occurs, enabling carrier aggregation to work effectively
Solution Approach 2:
The system changes the downlink frequency channel parameter to avoid harmonic overlap. By adjusting the downlink channel selection based on the uplink frequency range and harmonic multiplication factor, the system finds optimal channel configurations that maintain both high bandwidth utilization and acceptable reception sensitivity
2Ease of operation
If downlink frequency channels are allocated without considering harmonic overlap, then channel allocation simplicity is maintained, but reception sensitivity degrades due to harmonic interference
Solution Approach 1:
The base station determines the harmonic frequency range in advance based on the uplink frequency range and multiplication factor, then uses this pre-calculated information to guide downlink channel selection. This preliminary determination simplifies the overall process by providing clear selection criteria rather than requiring complex real-time optimization
Solution Approach 2:
The harmonic frequency range determination acts as an intermediary step between uplink channel assignment and downlink channel selection. This intermediate calculation provides guidance for channel allocation, bridging the simplicity of standard channel assignment with the need to avoid harmonic interference
Data Source
AI summary
Provided is a method for setting a communication channel for a base station employing carrier aggregation, which enables simultaneous use of radio waves at a plurality of frequency bands of different frequencies or a base station apparatus for setting a communication channel in accordance with carrier aggregation, which enables simultaneous transmission and reception at a plurality of frequency bands of different frequencies. At least one of a downlink frequency channel in a first frequency band and a downlink frequency channel in a second frequency band is set such that a frequency range of harmonics of an uplink frequency range in the first frequency band does not overlap a downlink frequency range in the second frequency band, the first frequency band and the second frequency band being included in the plurality of frequency bands for use in carrier aggregation.