UE Capability Reporting in MR-DC Scenarios
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Solution Overview
Problem
Current procedures for reporting UE capability in multi-radio access technology (RAT)-dual connectivity (MR-DC) scenarios, such as EUTRA-NR, NG-RAN-EUTRA-NR-DC, NR-EUTRA-DC, and NR-NR-DC, are not adequately defined, leading to procedural issues when a UE receives requests for multiple RAT types in a single message container.
Innovation Solution
A method involving a UE and a base station where the UE generates and transmits UE capability information based on candidate band combinations, filtering information, and feature set combinations, specifically for NE-DC, NR-DC, and EN-DC, to accurately report capabilities and support suitable configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing UE capability reporting procedure is used for MR-DC scenarios, then the procedure is simple, but procedural errors occur when handling multiple RAT types in a single message container
Solution Approach 1:
The UE capability reporting procedure is segmented into distinct phases: receiving RAT type information, generating candidate band combinations, filtering based on RAT type, and reporting. This segmentation allows each step to be handled systematically, reducing procedural errors when multiple RAT types are involved.
Solution Approach 2:
The base station performs preliminary action by providing filtering information about supported RAT types and band combinations before the UE generates its capability report. This allows the UE to pre-filter candidate band combinations according to the base station's capabilities, avoiding procedural errors later in the process.
2Loss of information
If the UE generates candidate band combinations for all RAT types, then comprehensive capability information is provided, but the message size and processing load increase
Solution Approach 1:
The UE extracts and reports only the relevant capability information based on the filtering information received from the base station. By taking out only the necessary band combinations and RAT types that match the base station's capabilities, the message size is reduced while maintaining information completeness for the actual deployment scenario.
Solution Approach 2:
The capability reporting is optimized for the local context of the specific base station by using its filtering information. The UE tailors the candidate band combination generation to match the base station's supported RAT types and bands, ensuring the reported information is both complete for that context and minimized in size.
3Productivity
If the UE filters candidate band combinations based on RAT type information, then the reporting is optimized, but the processing complexity increases
Solution Approach 1:
The filtering process is made dynamic by using the RAT type information and filtering information received from the base station to adaptively generate candidate band combinations. The UE dynamically adjusts which band combinations to consider based on the actual deployment scenario, improving efficiency without requiring complex static filtering rules.
Data Source
Figure 1a~1b
Figure 1c
Figure 1d~1e
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. According to an embodiment the disclosure considers all the procedures of reporting a UE capability for MR-DC in a method in which a UE reports its own capability.