Terminal Capability Information Reporting for Carrier Aggregation
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Solution Overview
Problem
Current radio communication systems, particularly in the New Radio Access Technology (NR) system, lack a scheme for efficiently reporting the separations between component carriers for carrier aggregation, which is essential for accurate capability information reporting and MIMO layer number representation.
Innovation Solution
User equipment is equipped with a capability information storage unit and a transmitting unit that reports the separation between component carriers for carrier aggregation as capability information to the base station, allowing for efficient signaling of supported band combinations and MIMO layer numbers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation with different separations is used for millimeter wave frequency band, then frequency utilization efficiency is improved, but capability information reporting complexity increases due to lack of separation reporting scheme
Solution Approach 1:
The capability information reporting is segmented into multiple parts: band combination information and separation information are reported separately. The separation information is further segmented into separation values and corresponding MIMO layer numbers, allowing the base station to efficiently determine system configuration without requiring a single complex reporting structure.
Solution Approach 2:
The patent adds a new dimension to capability information reporting by introducing separation values as an additional parameter alongside band combination information. This dimensional expansion allows the system to characterize multi-carrier configurations more precisely, enabling efficient millimeter wave carrier aggregation while maintaining clear reporting structure.
2Measurement precision
If separation information is reported as capability information, then carrier aggregation configuration accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent merges separation information reporting with existing capability information reporting mechanisms. By integrating separation values and MIMO layer numbers into the existing capability information framework, the system achieves precise carrier aggregation configuration without requiring separate dedicated signaling channels, thus controlling signaling overhead.
Solution Approach 2:
The capability information structure is designed to serve multiple functions simultaneously: it reports band combination support, separation values, and MIMO layer numbers all in one unified message. This multi-functionality reduces the need for multiple separate signaling exchanges between user equipment and base station.
Data Source
AI summary
A terminal is disclosed that includes a processor that includes, in capability information, a separation class indicating a frequency separation between a lower edge of a component carrier with a lowest frequency for supported intra-band non-contiguous carrier aggregation and an upper edge of a component carrier with a highest frequency for the supported intra-band non-contiguous carrier aggregation. The terminal further includes a transmitter that transmits the capability information to a base station, where the separation class is indicated by an index to identify a class of the frequency separation. In other aspects, a transmission method and a radio communication system are also disclosed.