UE Capability Reporting for NR-DC and CA Signaling Reduction
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Solution Overview
Problem
The existing signaling mechanism for user equipment capabilities in NR-DC and CA results in excessive data size due to signaling both parameters for NR-DC and CA across all band combinations, which is inefficient.
Innovation Solution
The user equipment generates a report that includes a first information element for NR-DC parameters only when there is a difference from CA parameters, otherwise omitting these elements to reduce data size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If both parameters for NR-DC and parameters for CA are signaled with respect to all NR band combinations, then the capability information is complete and accurate, but the signaling size increases excessively
Solution Approach 1:
The patent extracts only the necessary capability information by separating NR-DC parameters from CA parameters. The UE reports CA parameters for all band combinations, and only includes NR-DC parameters when there is a difference from the CA parameters, thereby extracting and transmitting only the essential differential information.
Solution Approach 2:
Instead of signaling both NR-DC and CA parameters for all band combinations (excessive action), the patent applies partial action by signaling NR-DC parameters only when necessary (when they differ from CA parameters). This reduces the overall signaling load while maintaining complete and accurate capability information.
2Adaptability or versatility
If parameters for NR-DC and CA are individually signaled for each band combination, then the capability reporting is comprehensive, but the reporting complexity increases
Solution Approach 1:
The patent merges the reporting of NR-DC and CA parameters by using a unified reporting structure. The UE first reports CA parameters for all band combinations, then conditionally reports NR-DC parameters only when they differ from the CA parameters, thereby simplifying the overall reporting process while maintaining comprehensiveness.
Solution Approach 2:
Instead of the conventional approach of reporting all parameters for all combinations, the patent inverts the logic by reporting parameters only when they differ. The UE reports CA parameters as the baseline and then reports NR-DC parameters only when there is a difference, thereby inverting the traditional exhaustive reporting approach into a differential reporting approach.
Data Source
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AI summary
A user equipment includes a receiving unit configured to receive, from a base station apparatus, information for requesting a report of a UE (User Equipment) capability, a control unit configured to generate the report that includes a UE capability supported in a band combination, and a transmitting unit configured to transmit the report to the base station apparatus, wherein in a case where a first information element is configured in the report, the control unit generates the report in which a parameter applied to a communication performed with dual connectivity in the band combination is configured in the first information element, and in a case where the first information element is not configured in the report, the control unit generates the report that includes a second information element including a parameter for a carrier aggregation applied to the communication.