IDC Bandwidth Detection for 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 identify the specific bandwidth within the larger NR frequency band where interference occurs, leading to inaccurate detection and configuration issues.
Innovation Solution
The base station provides frequency point and bandwidth indication information to the terminal, allowing it to determine a targeted frequency band for IDC detection, reducing the need to scan the entire NR bandwidth and enhancing detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal scans the entire NR frequency band for IDC detection, then the detection coverage is comprehensive, but the detection time and complexity increase significantly
Solution Approach 1:
The patent segments the entire NR frequency band into multiple bandwidth parts (BWPs). Instead of scanning the full band, the terminal only needs to detect IDC in the currently active BWP. This segmentation reduces the detection scope from the entire frequency band to a specific segment, thereby reducing detection time and complexity while maintaining detection accuracy for the active bandwidth.
2Loss of information
If the terminal reports IDC information for the entire frequency band, then the base station has complete information for configuration, but the reporting overhead and processing complexity increase
Solution Approach 1:
The patent extracts only the necessary IDC information from the entire frequency band - specifically, IDC detection results are reported only for the active bandwidth part rather than the entire NR band. This extraction approach reduces the amount of information that needs to be reported and processed, lowering signaling overhead and base station processing complexity while retaining the essential information needed for configuration decisions.
3Reliability
If the base station configures the terminal to monitor the entire NR bandwidth, then no IDC interference is missed, but the terminal's power consumption and processing load increase
Solution Approach 1:
The patent applies local quality by configuring the terminal to monitor only the specific bandwidth part where the terminal is currently operating, rather than uniformly monitoring the entire NR bandwidth. This localized monitoring approach reduces the terminal's power consumption and processing load while maintaining detection reliability for the active frequency resources. The base station can adjust which BWP the terminal monitors based on the terminal's current configuration and interference conditions.
Data Source
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AI summary
The IDC detection method comprises: determining, according to frequency point indication information sent by a base station (1400), a carrier frequency point to be detected needing IDC detection (S1); determining, according to bandwidth indication information sent by the base station (1400), a bandwidth to be detected corresponding to the carrier frequency point to be detected (S2); determining, according to the carrier frequency point to be detected and the bandwidth to be detected, a frequency band to be detected (S3); and detecting whether an IDC is present or going to appear in the frequency band to be detected (S4). The IDC detection method, on the one hand, reduces bandwidths needing to be detected by a terminal (1500), and on the other hand, enables IDC information reported to the base station (1400) by the terminal (1500) to be more accurate, so that the base station (1400) can reasonably configure the terminal (1500) according to the IDC information.