UE Capability Reporting for Carrier Aggregation
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Solution Overview
Problem
In LTE-A and 5G communication systems, the complexity of reporting user equipment (UE) capability information to base stations increases due to advanced features like carrier aggregation, making it inefficient and cumbersome, which hinders effective mobile communication.
Innovation Solution
A method and apparatus for efficiently reporting UE capability information by requesting and transmitting specific band combinations, including two downlink and one uplink frequency bands, using a UE capability information message that prioritizes carrier aggregation band combinations and includes non-CA bands, allowing the base station to determine the entire UE capability based on partial information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UE capability information includes all supported band combinations, then the base station can determine entire UE capability, but the amount of information to be reported increases significantly
Solution Approach 1:
The patent extracts only the necessary subset of band combination information that the base station needs to determine UE capability, rather than reporting all possible combinations. The UE selectively reports band combinations based on network requests or predefined criteria, removing redundant information while preserving essential capability data.
Solution Approach 2:
The capability information is segmented into different components: requested band combinations, supported band combinations, and capability indicators. This segmentation allows the UE to report information in a structured manner, providing only the relevant segments that answer the base station's capability inquiry without overwhelming it with unnecessary data.
2Productivity
If UE reports detailed carrier aggregation band combinations, then network performance improves, but reporting complexity increases
Solution Approach 1:
The base station sends a capability inquiry message that pre-specifies which band combinations are of interest. The UE prepares and reports only the relevant capability information in advance, based on this preliminary request, avoiding the complexity of generating and filtering comprehensive capability data on demand.
Solution Approach 2:
The patent changes the parameter representation by using compact indicators and standardized formats for band combination reporting. Instead of detailed descriptions of each band combination, the system uses efficient parameter encoding that reduces reporting complexity while maintaining the information needed for network performance optimization.
Data Source
AI summary
In order to transmit capability information of a user equipment (UE) to an evolved Node B (eNB), the UE may generate a UE CAPABILITY INFORMATION message including the capability information of the UE, and transmit the generated UE CAPABILITY INFORMATION message to the eNB. Here, the capability information of the UE may include at least one band combination supported by the UE and whether Time Division Duplexing-Frequency Division Duplexing Carrier Aggregation (TDD-FDD CA) for the band combination is supported.