NR Power Control via Effective Code Rate and Priority Scaling
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Solution Overview
Problem
Conventional power control techniques in New Radio (NR) systems are inefficient due to the additional features such as ultra-reliable low latency communication and varied payload support, which require more sophisticated methods for determining optimal transmit powers for control channels and data channels.
Innovation Solution
A user equipment (UE) determines transmit powers for control channels based on effective code rates, payload sizes, and resource block allocations, and adjusts powers for repeated transmissions and multiplexed channels, using different open-loop parameters and closed-loop commands to ensure efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional power control techniques are used in NR systems, then system complexity is reduced, but power control efficiency and communication reliability deteriorate due to additional NR features like ultra-reliable low latency communication and varied payload support
Solution Approach 1:
The patent changes multiple power control parameters including determining transmit power based on effective code rate of control information, using different transmit powers for repeated transmissions, scaling power based on transmission priority, and applying different open-loop parameters for different multiplexing techniques. These parameter changes enable adaptive power control that achieves ultra-reliable low latency communication while managing system complexity
Solution Approach 2:
The patent implements dynamic power control where transmit power is adjusted based on real-time conditions including effective code rate calculations, payload size variations, resource block allocations, and transmission priorities. This dynamic adaptation allows the system to maintain high reliability across varying communication conditions without requiring overly complex static configurations
2Reliability
If transmit power is increased for control channels to improve reliability, then communication reliability improves, but energy consumption increases
Solution Approach 1:
The patent determines transmit power dynamically based on effective code rate, payload size, and resource block allocation rather than using fixed high power levels. This allows the system to use minimum necessary power while maintaining reliability, reducing energy consumption unnecessarily incurred by constant high-power transmission
Solution Approach 2:
The patent employs closed-loop power control where transmit power decisions are based on feedback about current channel conditions, effective code rate, and transmission requirements. This feedback mechanism ensures power is used efficiently by adjusting levels based on actual needs rather than maintaining constantly high power consumption
3Productivity
If different transmit powers are used for repeated transmissions of control information, then power control efficiency improves, but device complexity increases
Solution Approach 1:
The patent segments power control into distinct components: open-loop power control for initial transmissions and closed-loop power control for repeated transmissions. This segmentation allows each component to be optimized independently, improving overall power control efficiency while managing complexity through modular design
Solution Approach 2:
The patent implements dynamic power adjustment for repeated transmissions based on transmission priority and channel conditions. By making power control dynamic rather than static, the system achieves better efficiency in utilizing power resources while the complexity is managed through systematic dynamic adaptation rules
4Productivity
If priority-based power scaling is implemented for multiplexed transmissions, then resource utilization efficiency improves, but device complexity increases
Solution Approach 1:
The patent applies different power scaling rules to different transmissions based on their priority levels. High-priority transmissions receive appropriate power scaling to ensure reliable delivery, while lower-priority transmissions use different scaling rules. This local differentiation optimizes resource utilization efficiency while managing complexity through priority-based categorization
Data Source
AI summary
Methods, systems, and devices for power control in New Radio (NR) systems are described. In one example, a user equipment (UE) may determine a transmit power for a control channel based on an effective code rate of control information to be transmitted in the control channel. In another example, the UE may be configured to use a different transmit power for repeated transmissions of control information in a control channel. In yet another example, the UE may be configured to determine a transmit power for a transmission in a time interval or scale a transmission in a time interval based on a priority of the transmission relative to other transmissions scheduled in the time interval. In yet another example, the UE may be configured to determine respective transmit powers for uplink transmissions multiplexed differently using different open-loop parameters.