UE Assistant Information Reporting for Dynamic Uplink Waveform Switching
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Solution Overview
Problem
Existing waveform switching technologies in uplink communication are semi-static and lack dynamic updating, leading to inefficient resource and power utilization due to the incapability to effectively switch between CP-OFDM and DFT-s-OFDM waveforms without RRC reconfiguration.
Innovation Solution
User Equipment (UE) is equipped with a method and apparatus to dynamically report UE assistant information, including power headroom and transmission power details, enabling dynamic waveform switching and optimizing resource and power utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If semi-static waveform switching is implemented without RRC reconfiguration, then device complexity is reduced, but waveform update rate becomes slow and transmission performance cannot be effectively improved
Solution Approach 1:
The patent implements dynamic waveform switching by enabling the UE to switch between CP-OFDM and DFT-s-OFDM waveforms in real-time based on current channel conditions and transmission requirements, rather than using semi-static switching. This is achieved through dynamic indication signaling that allows the network to trigger waveform switching without full RRC reconfiguration, thus maintaining low device complexity while significantly improving the waveform update rate and transmission performance.
2Productivity
If dynamic waveform switching is implemented through dynamic indication, then waveform update rate is improved, but the network cannot appropriately schedule UE uplink transmission resources or control UE uplink transmission power to maximize resource and power utilization efficiency
Solution Approach 1:
The patent introduces a feedback mechanism where the UE reports power headroom information and other uplink transmission capability parameters to the network side. This feedback enables the network to appropriately schedule UE uplink transmission resources and control UE uplink transmission power based on actual UE capabilities and channel conditions, thus maximizing resource and power utilization efficiency while maintaining dynamic waveform switching capabilities.
3Device complexity
If waveform configuration is updated only during RRC reconfiguration, then device complexity is reduced, but transmission performance cannot be effectively improved due to slow update rate
Solution Approach 1:
The patent segments the waveform configuration update process from the full RRC reconfiguration procedure. Instead of requiring complete RRC reconfiguration for waveform updates, the system uses separate dynamic indication signaling mechanisms that allow selective and rapid updates of waveform parameters. This segmentation maintains low device complexity while significantly improving transmission performance through faster configuration updates.
Data Source
AI summary
A method and apparatus for triggering UE assistant information reporting, and user equipment. The method of an embodiment of the present application includes: determining, by UE, according to an assistant information triggering condition, that UE assistant information needs to be reported; and reporting, by the UE, the UE assistant information, where the UE assistant information includes at least one of the following: UE power headroom related information corresponding to a target waveform; maximum transmission power actually used by the UE; maximum transmission power not actually used by the UE; maximum transmission power corresponding to the target waveform; a maximum power reduction MPR; an MPR corresponding to the target waveform; an additional MPR; an additional MPR corresponding to the target waveform; a power management MPR; a power management MPR corresponding to the target waveform; a maximum power exposure MPE; and an MPE corresponding to the target waveform.