Harmonic Interference Determination in 5G Network Devices
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Solution Overview
Problem
Harmonic interference in communication systems, particularly due to carrier aggregation, leads to degraded downlink receiving quality and reduced information transmission efficiency, as existing solutions like time division scheduling prolong the integrated scheduling period of uplink and downlink resources.
Innovation Solution
A method and network device that determine harmonic interference by calculating harmonic frequency information for uplink and downlink resources, allowing for resource selection based on interference levels to avoid main lobe areas and preferentially allocate resources in non-interference or side lobe areas, thereby improving resource selection reliability and transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If time division scheduling is used to allocate uplink and downlink resources in different TTIs, then harmonic interference is avoided, but the scheduling period is prolonged and information transmission efficiency is reduced
Solution Approach 1:
The patent segments the frequency spectrum by identifying and excluding harmonic frequency ranges from downlink resource allocation. Instead of separating time resources, the system divides frequency resources into harmonic-affected and non-harmonic regions, allowing simultaneous uplink-downlink scheduling while avoiding interference through frequency domain segmentation.
Solution Approach 2:
The patent applies local quality by differentiating treatment for different frequency regions. Downlink resources in harmonic frequency ranges are excluded or marked as interference-affected, while non-harmonic frequency resources are available for normal scheduling. This localized differentiation allows efficient resource utilization without requiring complete time division.
2Productivity
If downlink resources are allocated in frequency ranges affected by second harmonic interference, then resource utilization is maximized, but downlink receiving quality is severely degraded
Solution Approach 1:
The patent extracts harmful frequency ranges from the downlink resource allocation pool. By calculating second harmonic frequencies from uplink allocations and removing these frequency ranges from available downlink resources, the system prevents allocation of degraded quality resources while maximizing utilization of clean frequency spectrum.
Solution Approach 2:
The patent performs preliminary calculation of harmonic interference patterns before finalizing downlink resource allocation. By pre-computing second harmonic frequencies and their corresponding frequency ranges, the system can proactively exclude interfering resources rather than reacting to interference after it occurs, optimizing resource selection in advance.
Data Source
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AI summary
This application discloses an interference determining method and a network device. The method includes: obtaining first frequency information of a first resource; obtaining second frequency information of a second resource, where a frequency indicated by the first frequency information is lower than a frequency indicated by the second frequency information; determining, based on the first frequency information, harmonic frequency information corresponding to the first resource; and determining, based on the harmonic frequency information and the second frequency information, harmonic interference information between the first resource and the second resource. This application helps resolve a harmonic interference problem, and improve information transmission efficiency of a system.