Uplink Power Control for Simultaneous PUCCH Formats
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Solution Overview
Problem
Current 5G communication systems face challenges in achieving low latency and efficient transmission power control for uplink control channels, particularly in dynamic frame structures and hybrid beamforming systems, due to differences in transmission power between physical uplink shared channels and physical uplink control channels, which can lead to increased power transient times and reduced flexibility in scheduling.
Innovation Solution
A method and apparatus that enable terminals and base stations to perform transmission power control for uplink control channels using hybrid beamforming, different subcarrier spacings, or different uplink waveforms, by transmitting UE capability information and receiving PUCCH resource configurations, allowing for simultaneous transmission of long and short PUCCH formats within a slot, thereby optimizing power control and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If transmission power control is performed for uplink control channels in dynamic frame structures, then latency is reduced and scheduling flexibility is improved, but power transient time increases due to differences in transmission power between PUSCH and PUCCH
Solution Approach 1:
The patent implements dynamic power control for PUCCH transmission by allowing the terminal to adjust transmission power based on received power control commands from the base station. The power control mechanism dynamically adapts transmission power levels for different PUCCH formats (long and short formats) within the same slot, enabling flexible power management that reduces latency while controlling power transient effects through coordinated power adjustments.
2Adaptability or versatility
If hybrid beamforming and different subcarrier spacings are used for uplink control channels, then system adaptability and communication efficiency are improved, but device complexity increases
Solution Approach 1:
The patent enables the terminal to support multiple PUCCH formats (long and short formats) within the same slot, allowing a single device to handle different uplink control channel requirements. The terminal is configured with multiple PUCCH resource sets that can be selectively activated based on the specific communication scenario, subcarrier spacing, and beamforming configuration, providing universal adaptability without requiring separate dedicated hardware for each format.
Solution Approach 2:
The patent utilizes parameter changes in power control commands and resource configurations to adapt the uplink control channel transmission. The base station sends power control commands that adjust transmission power parameters, and the terminal configures different PUCCH resource parameters (such as frequency resources, time resources, and power levels) based on received configurations, enabling flexible adaptation to hybrid beamforming and different subcarrier spacings through parameter adjustment rather than structural changes.
Data Source
AI summary
A method performed by a user equipment (UE) in a wireless communication system is provided. The method includes transmitting, to a base station, UE capability information indicating whether the UE supports transmission of a long physical uplink control channel (PUCCH) format and a short PUCCH format in a same slot, receiving, from the base station, information on a PUCCH resource configuration, and transmitting, to the base station, two PUCCHs within a slot using the long PUCCH format and the short PUCCH format, based on the PUCCH resource configuration.