UE Capability Signaling for MR-DC Band Combination Priority
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Solution Overview
Problem
In MR-DC, the band combinations supported by user apparatuses are not necessarily generated from a list that includes both E-UTRA and NR bands, limiting the application of dual connectivity.
Innovation Solution
A method for generating a band combination list that includes both E-UTRA and NR bands by prioritizing or alternating the order of bands in the lists, ensuring that MR-DC band combinations are indicated at the beginning of the supported band combinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the user apparatus indicates band combinations from a list including E-UTRA and NR bands, then the supported band combinations are provided, but the MR-DC band combinations are not necessarily generated from this list, limiting dual connectivity application
Solution Approach 1:
The user apparatus performs preliminary actions by generating MR-DC band combinations before indicating supported band combinations to the base station. Specifically, the apparatus generates band combinations including at least one E-UTRA band and at least one NR band, and indicates these pre-generated MR-DC band combinations in the UE capability information. This preliminary generation ensures that MR-DC capable band combinations are proactively provided to the network side, enabling proper dual connectivity setup without relying on network-side generation.
2Adaptability or versatility
If the user apparatus simply indicates supported bands without generating specific MR-DC band combinations, then the indication process is simple, but the ability to apply dual connectivity is limited
Solution Approach 1:
The user apparatus changes the parameter of band combination generation by systematically creating combinations of E-UTRA and NR bands according to specific rules. The apparatus generates band combinations by selecting from available E-UTRA bands and NR bands, ensuring that each combination includes at least one band from each RAT. This parameter-based generation approach enables comprehensive MR-DC capability indication while maintaining a structured and manageable process.
Data Source
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AI summary
A user apparatus that performs communications with a base station apparatus by using a first RAT and a second RAT is provided. The user apparatus includes: a reception unit configured to receive, from the base station apparatus, first information indicating bands used for candidates of band combinations supported by the user apparatus; a generation unit configured to, based on the first information, generate terminal capability information including second information that includes a list including, at the beginning of the list, a band combination including a band used in the first RAT and a band used in the second RAT; and a transmission unit configured to transmit the generated terminal capability information to the base station apparatus.