PUSCH Dynamic Waveform Switching for Multi-TRP Power Adaptation
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Solution Overview
Problem
Current PUSCH transmission technologies face challenges in efficiently switching between different waveforms and power amplifier configurations for multiple transmission and reception points, leading to limitations in coverage enhancement and dynamic waveform switching due to insufficient relative power tolerance and ping-pong effects.
Innovation Solution
The solution involves a user equipment (UE) and base station communication mechanism where the UE indicates its power amplifier configurations, target power change durations, and relative power tolerance capabilities to the base station, allowing dynamic switching between DFT-s-OFDM and CP-OFDM waveforms based on path losses and power headroom variations, thereby optimizing power adaptation and avoiding ping-pong switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic waveform switching is implemented for multiple TRPs, then coverage enhancement is improved, but power adaptation reliability deteriorates due to insufficient relative power tolerance
Solution Approach 1:
The patent introduces new capability indicators that define specific parameter ranges for power tolerance and time duration. The UE reports whether it can achieve a target power change within a specified time duration with a given power tolerance, allowing the network to select appropriate waveforms based on these quantified parameters rather than making generic switching decisions.
Solution Approach 2:
The patent implements a feedback mechanism where the UE reports its power amplifier configuration capabilities and power tolerance characteristics to the network. This feedback enables the network to make informed decisions about waveform selection and power control for different TRPs, ensuring reliable power adaptation during dynamic switching.
2Productivity
If power switching between TRPs is performed rapidly, then transmission flexibility is improved, but ping-pong effects increase due to insufficient power stabilization time
Solution Approach 1:
The patent requires the UE to report its power amplifier configuration and power tolerance capabilities in advance before actual transmission occurs. This preliminary information allows the network to pre-plan waveform switching sequences that respect the UE's power stabilization requirements, avoiding rapid switching that would cause ping-pong effects.
Solution Approach 2:
The patent introduces dynamic capability indicators that can be configured differently for different TRPs and transmission scenarios. The network can dynamically adjust waveform selection and power control parameters based on the specific TRP configuration and the UE's reported capabilities for each TRP, enabling flexible yet stable power management.
3Adaptability or versatility
If multiple power amplifier configurations are supported, then adaptability to different TRPs is improved, but device complexity increases
Solution Approach 1:
The patent defines a universal set of capability indicators that can be used across different TRP configurations. Instead of requiring separate complex reporting mechanisms for each TRP type, the UE uses a standardized set of indicators to describe its power amplifier capabilities, reducing the complexity of the overall system while maintaining multi-TRP adaptability.
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AI summary
An apparatus configured to: transmit, to a base station, a capability related to mTRP operation, comprising at least one of: a first indication of one or more power amplifier configurations, a second indication of at least one first time duration to reach at least one target power change, a third indication of a second time duration during which a waveform is to be maintained, a fourth indication of a relative power tolerance associated with the at least one target power change, or a fifth indication of a capability for achieving a predetermined relative power tolerance during a predetermined time duration during the multiple transmission and reception point operation; receive, from the base station, a sixth indication of at least one waveform for use during one or more respective transmissions of a plurality of PUSCH transmissions; and receive, from the base station, an uplink configuration for the plurality of PUSCH transmissions.