UE Carrier Aggregation Mode Selection Using Beamforming Feedback
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Solution Overview
Problem
Conventional inter-band carrier aggregation mode selection by network entities does not account for relevant UE-specific factors, leading to suboptimal performance in different conditions.
Innovation Solution
User equipment (UE) determines beam performance for multiple frequency bands and selects an inter-band carrier aggregation mode based on UE-specific conditions such as power, thermal, and channel information, then signals this mode to the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network entities perform inter-band carrier aggregation mode selection, then carrier aggregation can be configured, but the selection does not account for UE-specific factors leading to suboptimal performance
Solution Approach 1:
The UE performs self-determination of the inter-band CA mode by evaluating its own beamforming information and internal conditions (power, thermal, hardware capabilities) without requiring complex network-side analysis. The UE autonomously selects the optimal mode (intra-module or inter-module) based on its current state and reports this selection to the network entity.
Solution Approach 2:
The UE measures beamforming information across different frequency bands and provides feedback to the network entity about its determined inter-band CA mode. This feedback mechanism enables the network to configure carrier aggregation based on accurate UE-specific conditions while maintaining network control over the overall configuration process.
2Reliability
If UE determines inter-band CA mode based on beamforming information and UE-specific conditions, then performance reliability increases, but device processing requirements increase
Solution Approach 1:
The UE performs beamforming measurements and evaluates its internal conditions (power state, thermal state, hardware capabilities) in advance before determining the inter-band CA mode. This preliminary assessment allows the UE to make informed decisions without requiring intensive real-time processing during active carrier aggregation operation.
Solution Approach 2:
The UE dynamically adjusts its determination process based on changing parameters such as power availability, thermal conditions, and channel state. By monitoring these parameters and adapting the CA mode selection accordingly, the UE achieves high reliability while managing its processing power consumption efficiently.
3Adaptability or versatility
If conventional network-based mode selection is used, then network control is maintained, but adaptation to UE-specific conditions is limited
Solution Approach 1:
The determination process is segmented into two distinct parts: the UE evaluates its own specific conditions and determines the optimal mode, while the network entity maintains overall configuration control and receives the UE's determination. This segmentation allows both UE-specific adaptability and network control to coexist effectively.
Solution Approach 2:
Instead of the network entity directly determining the CA mode based on limited UE information, the inversion approach has the UE determine its own optimal mode based on comprehensive self-knowledge of its conditions, then report this determination to the network. This reverses the traditional control flow to achieve better adaptability while preserving network oversight.
Data Source
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Figure 3A~3B
AI summary
In one aspect, a method of wireless communication includes determining, by a user equipment (UE), beamforming information for two or more frequency bands. The method also includes determining, by the UE, an inter-band carrier aggregation (CA) mode based on the beamforming information and one or more conditions. The method further includes transmitting, by the UE, a message indicating the inter-band CA mode. Other aspects and features are also claimed and described.