Uplink Power Control for Dynamic Waveform Switching
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Solution Overview
Problem
Existing communication systems face challenges in dynamically switching waveforms for uplink power control without restrictions on user equipment (UE) transmission power levels, particularly when using closed loop power control (CLPC) and dynamic waveform switching (DWS), leading to suboptimal coverage and interference issues.
Innovation Solution
The solution involves determining transmission power for PUSCH transmissions based on factors such as maximum transmission power, transform precoder indicators, and power control adjustment states, allowing dynamic switching to DFT-s-OFDM without power restrictions by adjusting power control states using predefined or configured values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic waveform switching is implemented without power restrictions, then waveform flexibility and adaptability are improved, but transmission power control reliability deteriorates
Solution Approach 1:
The patent implements dynamic waveform switching between CP-OFDM and DFT-s-OFDM based on real-time channel conditions and power control requirements. The system dynamically adjusts the waveform type and transmission power level in response to varying network conditions, enabling flexible adaptation while maintaining reliable power control through closed-loop feedback mechanisms.
Solution Approach 2:
The patent changes key parameters including waveform type (CP-OFDM/DFT-s-OFDM), transmission power level, and power control adjustment states to optimize system performance. By transitioning between different waveform parameters and power states, the system achieves both waveform flexibility and reliable power control under varying operational conditions.
2Reliability
If transmission power is increased to meet SNR requirements, then communication reliability is improved, but co-channel interference increases
Solution Approach 1:
The patent dynamically adjusts transmission power parameters based on real-time channel conditions, SNR requirements, and interference levels. By optimizing the power control adjustment state and selecting appropriate waveform types, the system achieves reliable communication while minimizing co-channel interference through adaptive power management.
Solution Approach 2:
The patent implements closed-loop power control with feedback mechanisms that continuously monitor transmission quality and interference levels. Based on this feedback, the system adjusts power control adjustment states and waveform selections to maintain communication reliability while reducing harmful interference to other cells or users.
3Object-generated harmful factors
If transmission power is decreased to minimize interference, then co-channel interference is reduced, but signal quality and coverage deteriorate
Solution Approach 1:
The patent optimizes transmission power parameters and waveform types to achieve the lowest possible power level that maintains adequate signal quality. By selecting between CP-OFDM and DFT-s-OFDM waveforms and adjusting power control states, the system minimizes interference while preserving coverage and signal quality through adaptive parameter selection.
Data Source
AI summary
Embodiments of the present disclosure relate to devices, methods, apparatuses, and computer readable storage media of uplink power control. A first apparatus receives a first DCI scheduling a first PUSCH transmission at a first TO, and a second DCI scheduling a second PUSCH transmission at a second TO subsequent to the first TO. The first apparatus determines a transmission power based on a second power control adjustment state and transmits the second PUSCH transmission at the second transmission power. The transmission power and/or the second power control adjustment state is determined based on at least one of: a first maximum transmission power at the first TO, a second maximum transmission power at the second TO, a value of the first TPI field of the first DCI, a value of the second TPI field in the second DCI or a first power control adjustment state for the first PUSCH transmission.