Uplink Control Information Spectral Efficiency Determination
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately determining spectral efficiency for transmitting uplink control information (UCI) on uplink data channels, leading to inaccurate uplink power control, which can result in unreliable UCI reception and inefficient power usage.
Innovation Solution
The method involves determining spectral efficiency based on the modulation coding scheme (MCS) for UCI transmission on uplink data channels, performing uplink power control accordingly, and transmitting UCI without uplink data using an optimized power level, which includes calculating the number of resource elements allocated for CSI-part 1 and HARQ-ACK to ensure accurate power settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spectral efficiency is determined using conventional methods for UCI transmission on uplink data channels, then the calculation process is simple, but the accuracy of transmit power calculation deteriorates
Solution Approach 1:
The patent changes the parameters used for spectral efficiency calculation from conventional methods to a new approach that incorporates the modulation order and target code rate from the MCS index. This parameter change enables accurate spectral efficiency determination specifically for UCI transmissions without requiring complex additional calculations, thus improving accuracy without significantly increasing device complexity
Solution Approach 2:
The patent segments the spectral efficiency calculation into distinct components: determining modulation order from MCS, determining target code rate from MCS, calculating spectral efficiency from these components, and then using the result for power control. This segmentation allows for accurate yet manageable calculations that can be implemented without excessive complexity
2Reliability
If uplink power control is performed with inaccurate spectral efficiency, then the power control process is simple, but the reliability of UCI transmission deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the determined spectral efficiency is used to adjust the transmit power for UCI transmissions. The base station receives the UCI, and the process can be adjusted based on transmission outcomes, ensuring reliable delivery while maintaining efficient power control through the calculated spectral efficiency values
3Productivity
If transmit power is not accurately controlled for UCI transmission, then the power usage is simple to manage, but the bandwidth usage efficiency deteriorates
Solution Approach 1:
The patent changes the power control parameters by incorporating accurate spectral efficiency calculations that consider the specific characteristics of UCI transmissions. This enables the system to optimize the trade-off between transmit power and bandwidth efficiency, ensuring that power is used efficiently without excessive battery consumption while maintaining high bandwidth utilization
Solution Approach 2:
The patent applies local quality optimization by determining spectral efficiency specifically for UCI transmissions rather than using generic power control settings. This localized approach allows for optimized power settings tailored to control information transmissions, improving bandwidth efficiency while avoiding unnecessary power consumption
Data Source
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AI summary
Certain aspects of the present disclosure relate to methods and apparatus for determining spectral efficiency for transmitting uplink control information (UCI) on an uplink data channel for use in performing uplink power control.