Mode 2 TPMI List Signaling for Full-Power 5G Precoding
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Solution Overview
Problem
Existing wireless communication systems face challenges in achieving full power transmission in certain precoding matrix configurations, particularly in 5G NR systems, due to limitations in the current TPMI list design for UE power amplifiers, which do not support coherent and partial-coherent operations effectively.
Innovation Solution
Enhancements to the TPMI list signaling mechanism, allowing UEs to report multiple TPMI groups and configurations that support full power transmission, including specific group definitions and reporting criteria for different coherent and non-coherent scenarios, enabling UEs to indicate their capabilities more accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the current TPMI list design is used, then the signaling mechanism is simple, but full power transmission cannot be achieved in coherent and partial-coherent operations
Solution Approach 1:
The TPMI list is segmented into multiple groups (first TPMI group, second TPMI group, third TPMI group) based on coherence characteristics. Each group contains TPMIs suitable for specific operation modes (coherent, partial-coherent, non-coherent), allowing the system to select appropriate TPMIs for full power transmission while maintaining manageable complexity through structured organization.
Solution Approach 2:
The patent introduces dynamic reporting mechanisms where UEs can report different TPMI group configurations based on their capabilities and the required transmission mode. The system dynamically selects from multiple TPMI groups depending on the operational requirements, enabling flexible full power transmission adaptation.
2Power
If multiple TPMI groups are supported, then full power transmission capability is improved, but UE capability reporting complexity increases
Solution Approach 1:
UE capability reporting is segmented into distinct components: indicating support for multiple TPMI groups, specifying which groups are supported, and providing detailed TPMI lists for each group. This segmentation allows systematic reporting of full power transmission capabilities without overwhelming complexity.
Solution Approach 2:
The patent defines specific parameters and indicators for capability reporting, such as a bitmap indicating support for multiple TPMI groups and specific group identifiers. By standardizing these parameters, the system achieves comprehensive capability reporting while maintaining structured simplicity.
3Reliability
If TPMI list is enhanced with multiple groups, then signal quality and coverage are improved, but system configuration complexity increases
Solution Approach 1:
The TPMI list is divided into coherence-based groups (coherent, partial-coherent, non-coherent), allowing the system to configure and select appropriate TPMIs for specific signal quality requirements. This segmentation enables improved coverage through targeted TPMI selection while maintaining configuration simplicity through clear group categorization.
Solution Approach 2:
The system incorporates feedback mechanisms where UEs report their supported TPMI groups and capabilities, allowing the network to configure appropriate TPMI lists based on actual UE capabilities and signal requirements. This feedback loop enables optimized signal quality and coverage while simplifying configuration through capability-based adaptation.
Data Source
AI summary
Disclosed are enhancements for a Mode 2 TPMI list indication, including TPMI capability reporting design, TPMI list enhancement for four-port partial coherent UE, and TPMI list enhancement for four-port non-coherent UE.