Base Station Spectrum Sharing for LTE-NR Interference Elimination
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Solution Overview
Problem
Interference between LTE and NR channels occurs during spectrum sharing, affecting the transmission quality of NR messages due to mutual interference on shared frequency domain resources.
Innovation Solution
A base station determines and eliminates interference signals on time-frequency resources using LTE technology to enable transmission of NR messages without rate matching, improving transmission quality by ensuring the target message is sent in a bandwidth where interference is removed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LTE and NR share the same frequency domain resources, then spectrum utilization is improved, but mutual interference occurs between LTE and NR signals affecting transmission quality
Solution Approach 1:
The patent segments the frequency domain resources by dividing them into interference resources (where LTE signals are present) and non-interference resources. The NR message is specifically mapped to non-interference resources, separating the transmission paths to avoid mutual interference while maintaining spectrum sharing benefits.
Solution Approach 2:
The patent applies local quality by making the resource allocation strategy message-type dependent. Different messages (PDCCH, PDSCH, PBCH) are mapped to different resource regions based on their interference sensitivity and characteristics, optimizing transmission quality for each specific message type in its local resource context.
2Device complexity
If NR messages are transmitted on shared frequency resources without rate matching, then transmission complexity is reduced, but transmission quality deteriorates due to interference
Solution Approach 1:
The patent segments the frequency domain into interference and non-interference resources, then maps NR messages to non-interference resources. This segmentation eliminates the need for complex rate matching operations while ensuring transmission quality, as messages are placed in regions free from LTE interference.
Solution Approach 2:
The patent performs preliminary action by pre-determining the non-interference resource regions based on LTE resource allocation patterns before NR message transmission. This advance planning allows direct mapping of NR messages to clean resources without requiring complex real-time interference management or rate matching.
3Reliability
If interference signals are eliminated for NR message transmission, then transmission quality is improved, but spectrum sharing efficiency may be reduced
Solution Approach 1:
The patent applies local quality by selectively eliminating interference only in the specific frequency resources where NR messages are transmitted, rather than across the entire spectrum. This localized approach maintains transmission quality for critical messages while preserving spectrum sharing efficiency in other resource regions.
Solution Approach 2:
The patent applies partial action by eliminating interference signals only for specific NR message types and their corresponding resource regions, rather than eliminating all interference across the entire spectrum. This partial elimination maintains sufficient transmission quality while minimizing impact on overall spectrum sharing efficiency.
Data Source
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AI summary
Embodiments of this application disclose a data processing method. The method in embodiments of this application may be applied to a communications system. The method in embodiments of this application includes: Abase station obtains a time-frequency resource that is required for sending a target message by using a first radio access technology; and the base station eliminates an interference signal to be sent on the time-frequency resource by using a second radio access technology, where the time-frequency resource is for sending the target message by using the first radio access technology. In embodiments of this application, when the target message is sent, the target message may not be interfered with by an interference signal on a same frequency domain resource. This improves transmission quality of sending the target message by the base station.