IDC Bandwidth Detection in LTE-NR Dual Connectivity
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Solution Overview
Problem
Existing methods for detecting in-device coexistence (IDC) in LTE-NR dual connectivity scenarios fail to accurately determine the specific bandwidth affected by interference, leading to incorrect detection of IDC across the entire NR frequency band.
Innovation Solution
A method where a base station provides frequency point and bandwidth indication information to a terminal, allowing the terminal to specifically identify the carrier frequency point and corresponding bandwidth for IDC detection, thereby enabling targeted detection of interference within a defined frequency band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal detects IDC across the entire NR frequency band without bandwidth indication, then the detection coverage is comprehensive, but the detection accuracy deteriorates due to inability to identify specific affected bandwidth
Solution Approach 1:
The base station segments the NR frequency band into multiple bandwidth parts and indicates specific bandwidth parts to the terminal for IDC detection. This segmentation allows the terminal to focus detection resources on specific frequency ranges rather than scanning the entire band, thereby improving detection accuracy while reducing unnecessary detection in unaffected areas.
Solution Approach 2:
The base station performs preliminary analysis to determine which bandwidth parts are likely to be affected by IDC interference before instructing the terminal to detect. By providing bandwidth indication information in advance, the base station guides the terminal to perform targeted detection on pre-identified frequency ranges, improving both accuracy and efficiency.
2Reliability
If the terminal performs IDC detection on the entire NR frequency band, then no IDC cases are missed, but the detection complexity and resource consumption increase
Solution Approach 1:
Instead of applying uniform detection across the entire frequency band, the base station provides bandwidth indication information that specifies which local bandwidth parts require detection. This allows the terminal to apply detection resources selectively to specific frequency regions, maintaining reliability for affected areas while reducing complexity in unaffected areas.
Solution Approach 2:
The terminal performs detection on a partial subset of the frequency band rather than the complete band. The base station indicates the specific bandwidth parts that need detection, allowing the terminal to perform sufficient detection coverage on critical areas without the excessive action of scanning the entire frequency band.
3Ease of operation
If the base station receives IDC reports without bandwidth information, then the reporting process is simple, but the configuration adjustment accuracy deteriorates
Solution Approach 1:
The terminal uses the bandwidth indication information received from the base station to generate feedback reports that include both the IDC detection result and the specific bandwidth part identification. This feedback mechanism ensures that the base station receives precise information about which bandwidth parts are affected, enabling accurate configuration adjustments while maintaining reporting simplicity through standardized message formats.
Data Source
AI summary
A method for detecting IDC. The method includes: determining, according to frequency point indication information sent by a base station, a carrier frequency point to be detected that needs IDC detection; determining, according to bandwidth indication information sent by the base station, a bandwidth to be detected corresponding to the carrier frequency point to be detected; determining, according to the carrier frequency point to be detected and the bandwidth to be detected, a frequency band to be detected; and detecting whether IDC exists or is to occur in the frequency band to be detected.