UE Capability Reporting for Simultaneous UL DL Transmission
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Solution Overview
Problem
In wireless communication systems, particularly when multiple frequency bands are aggregated, it is challenging for base stations to determine whether user equipment (UE) supports simultaneous uplink and downlink transmission capability across these bands, especially for special types of terminals like fixed stations.
Innovation Solution
A reporting method and apparatus where UE reports capability indication information to a network side device, indicating whether frequency bands in a frequency band combination support simultaneous uplink and downlink transmission capability. This information is conveyed through indication bits, each corresponding to a frequency band combination, with an indication code indicating support or non-support of the simultaneous transmission capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If capability indication information is reported for each frequency band combination, then the base station can accurately determine simultaneous uplink and downlink transmission capability, but the signaling overhead and reporting complexity increase
Solution Approach 1:
The capability indication is segmented into two parts: (1) a first capability indication value indicating whether the terminal supports simultaneous uplink and downlink transmission in a first frequency band, and (2) a second capability indication value indicating whether the terminal supports simultaneous uplink and downlink transmission in a second frequency band. This segmentation allows precise capability representation for each band while maintaining structured reporting.
Solution Approach 2:
Different capability indication values are provided for different frequency bands according to their specific characteristics. The first capability indication value corresponds to the first frequency band and the second capability indication value corresponds to the second frequency band, allowing each band to be described with appropriate granularity and detail.
2Measurement precision
If capability indication information is reported for each frequency band combination, then the base station can accurately determine simultaneous uplink and downlink transmission capability, but the signaling overhead increases
Solution Approach 1:
The capability information is segmented into distinct first and second capability indication values corresponding to different frequency bands. This segmentation enables the network to receive precise capability information for each band without requiring redundant comprehensive reporting for all possible band combinations, thereby reducing overall signaling overhead.
Solution Approach 2:
Instead of reporting capability information for all possible frequency band combinations (excessive action), the terminal reports capability indication values for specific first and second frequency bands (partial action). This partial reporting approach provides sufficient information for the base station to determine capability in aggregated scenarios without the overhead of complete enumeration.
3Adaptability or versatility
If the terminal supports multiple frequency bands with different capabilities, then the system flexibility and adaptability improve, but the difficulty of capability management and reporting increases
Solution Approach 1:
The capability management is segmented by frequency band, with separate first and second capability indication values for different bands. This allows the terminal to independently manage and report capabilities for each frequency band, simplifying the overall management complexity while maintaining high adaptability across multiple bands with different characteristics.
Solution Approach 2:
Each frequency band is assigned specific capability indication values tailored to its local characteristics. The first capability indication value reflects the terminal's capability in the first frequency band, while the second capability indication value reflects the capability in the second frequency band, allowing optimized capability management for each band's specific requirements.
Data Source
AI summary
A reporting method is performed by user equipment (UE), and includes: reporting capability indication information to a network side device, wherein the capability indication information indicates whether frequency bands in a frequency band combination support simultaneous uplink and downlink transmission capability.