Terminal Capability Reporting for Secondary Node Addition
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Solution Overview
Problem
In EN-DC wireless communication systems, the eNB fails to consider NR-specific UE capabilities when determining band combinations for gNB, leading to unsupported band configurations and secondary node addition failures.
Innovation Solution
A terminal is equipped with a reception unit to receive inquiries about its capabilities, a control unit to determine supported bands and parameters, and a transmission unit to report these capabilities to the eNB, allowing the eNB to refer to NR-specific UE capabilities when determining usable band combinations for gNB addition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the eNB determines band combinations without referring to NR-specific UE capability, then signaling is reduced and processing is simplified, but the reliability of secondary node addition deteriorates due to determination of unsupported band combinations
Solution Approach 1:
The terminal performs preliminary determination of NR-specific UE capability information including band combinations and parameters before the eNB makes the final band combination determination. This allows the eNB to reference already-filtered capability information, maintaining reliability while avoiding the need for the eNB to perform complex NR-specific capability analysis
Solution Approach 2:
The terminal acts as an intermediary that translates and filters NR-specific UE capability information into a format suitable for eNB processing. The terminal receives detailed NR capability information from the UE, determines supported band combinations and parameters, and reports this processed information to the eNB, thereby bridging the gap between UE capability and eNB decision-making
2Loss of time
If the eNB determines band combinations without referring to NR-specific UE capability, then the determination process is faster, but the accuracy of band combination selection deteriorates leading to addition failures
Solution Approach 1:
The terminal performs preliminary filtering and determination of supported band combinations and parameters before reporting to the eNB. This pre-processing ensures that the eNB receives only compatible and accurate band combination information, maintaining high accuracy while reducing the time required for eNB processing
Solution Approach 2:
The terminal autonomously determines its own NR-specific UE capability information including supported band combinations and parameters, and self-reports this information to the eNB. This self-service approach eliminates the need for the eNB to perform complex capability analysis, reducing determination time while ensuring accuracy through the terminal's own capability knowledge
Data Source
AI summary
A terminal includes: a reception unit configured to receive an inquiry related to terminal capability including bands and a parameter from a first base station, the bands being supported by a second base station that performs communication together with the first base station according to DC (Dual Connectivity) and the parameter being supported by the second base station in the bands; a control unit configured to determine the terminal capability corresponding to the bands and the parameter; and a transmission unit configured to transmit a report related to the determined terminal capability to the first base station.