Uplink Power Control for Overlapping Transmission Occasions
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Solution Overview
Problem
Existing power control mechanisms for uplink transmissions in wireless communication systems, particularly in scenarios with simultaneous transmissions, are inaccurate due to the assumption that each transmission carries a transport block independently, leading to inefficiencies in energy efficiency.
Innovation Solution
A method for determining power adjustment components for simultaneous uplink transmissions by obtaining ratio information based on bits per resource element (BPRE) for overlapping transmission occasions, allowing for precise power control adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional uplink transmission power control mechanisms are used for simultaneous transmissions, then the power control process is simple, but the power adjustment component is inaccurate leading to poor energy efficiency
Solution Approach 1:
The patent segments the power adjustment into separate components: a first power adjustment component based on BPRE ratio information and a second power adjustment component based on TPC feedback. This segmentation allows each component to handle specific aspects of power control independently, improving accuracy for simultaneous transmissions while maintaining manageable complexity through modular calculation.
Solution Approach 2:
The patent introduces ratio information as a new parameter that represents the relationship between BPRE values of multiple uplink transmissions. By changing the power control approach to incorporate this ratio parameter, the system achieves more accurate power adjustment for simultaneous transmissions without requiring complete redesign of the existing power control framework.
2Measurement precision
If ratio information is obtained and processed for accurate power control, then power control precision is improved, but processing complexity increases
Solution Approach 1:
The network device performs preliminary action by determining and providing ratio information in advance, before the terminal device needs to calculate the final power adjustment. This pre-computation of the BPRE ratio reduces the processing burden on the terminal device during actual power control operations, improving precision while limiting complexity increase to mainly network-side operations.
Solution Approach 2:
The ratio information acts as an intermediary parameter that bridges the gap between raw BPRE values and the final power adjustment decision. Instead of the terminal device directly processing complex BPRE calculations, the ratio information serves as a pre-processed intermediary that simplifies the terminal's processing while maintaining the necessary precision for accurate power control.
3Productivity
If multiple uplink transmissions are supported simultaneously, then system capacity is improved, but power control accuracy deteriorates
Solution Approach 1:
The patent applies local quality by determining power adjustment components specifically for each uplink transmission occasion based on its individual BPRE value and the ratio information. Instead of using a uniform power control approach for all transmissions, each transmission receives tailored power adjustment according to its specific characteristics, maintaining accuracy even when multiple transmissions occur simultaneously.
Solution Approach 2:
The patent introduces dynamic power adjustment by using ratio information that reflects the relative BPRE values of different uplink transmissions. The power control mechanism dynamically adapts to the specific conditions of each transmission occasion, adjusting power levels based on real-time ratio calculations rather than using static predetermined values, thereby maintaining accuracy under varying system loads.
Data Source
AI summary
Embodiments of the present disclosure relate to methods and apparatus for uplink transmission power control. A terminal device obtains ratio information for power adjustment of at least one uplink transmission occasion of two or more uplink transmission occasions, wherein the two or more uplink transmission occasions at least partially overlap in a time domain and the ratio information indicates an adjustment factor for bits per resource element of the at least one uplink transmission occasion of the two or more uplink transmission occasions. The terminal device determines a power adjustment component for the at least one uplink transmission occasion of the two or more uplink transmission occasions at least partially based on the ratio information. In this way, efficient power control for simultaneous uplink transmissions can be achieved, thereby improving energy efficiency.