PUCCH Uplink Power Control Using Accumulated TPC Commands
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Solution Overview
Problem
In new radio (NR) air interface systems, the use of different waveforms for transmitting uplink control information (UCI) on PUCCH and PUSCH results in poor frequency diversity gain due to different peak-to-average power ratios (PAPRs), affecting data transmission performance. Additionally, the timing of bandwidth part (BWP) switching and CSI reporting in 5G systems is not well-defined, and the reliance on cell-specific reference signals for measurement and handover is inadequate for future 5G networks.
Innovation Solution
The method involves adjusting power control for PUCCH based on dynamic timing indications and using flexible BWP switching mechanisms, along with UE-specific CSI reporting methods that include periodic and aperiodic CSI reports, and employing UE-specific CSI-RS resources for accurate measurement and handover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different waveforms are used for transmitting UCI on PUCCH and PUSCH, then transmission flexibility is improved, but frequency diversity gain deteriorates due to different PAPRs
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the waveform selection based on transmission conditions. The system can switch between different waveforms (e.g., OFDM, SC-FDMA) for PUCCH and PUSCH transmissions, optimizing the PAPR characteristics for each specific case to maintain frequency diversity gain while preserving transmission flexibility.
Solution Approach 2:
The patent implements dynamics by making the waveform selection adaptive rather than fixed. The system dynamically determines which waveform to use based on real-time transmission requirements, channel conditions, and power control commands, allowing the system to optimize performance for each specific transmission scenario.
2Ease of operation
If cell-specific reference signals are used for measurement, then measurement simplicity is improved, but measurement precision deteriorates for future 5G networks
Solution Approach 1:
The patent applies local quality by transitioning from cell-specific reference signals to UE-specific reference signals. Each UE has its own dedicated reference signals for measurement, allowing customized measurement configurations tailored to individual UE requirements, channel conditions, and measurement purposes, thereby improving measurement precision while maintaining operational simplicity through automated signal generation and processing.
3Adaptability or versatility
If BWP switching timing is not well-defined, then system flexibility is improved, but communication reliability deteriorates
Solution Approach 1:
The patent applies preliminary action by establishing well-defined timing relationships and procedures for BWP switching before actual communication occurs. The system pre-configures timing parameters, switching thresholds, and procedural steps to ensure reliable and predictable BWP transitions, maintaining communication reliability while preserving system flexibility through configurable timing parameters.
Data Source
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AI summary
The present disclosure relates to a method performed by a terminal, the method comprising: receiving, from a base station, configuration information including information on a physical uplink control channel, PUCCH, resource; receiving, from the base station, downlink control information, DCI, including a transmission power control, TPC, command value; identifying, based on the DCI, TPC command values that satisfy a requirement; identifying, based on an accumulated value of the TPC command values, a transmission power of a PUCCH transmission; and performing the PUCCH transmission based on the transmission power on the PUCCH resource. The present disclosure also provides a corresponding device.