Quality-Aware Uplink Power Control for Distortion Compensation
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Solution Overview
Problem
Current power control methods in 5G systems are inadequate for advanced receivers that can compensate for non-linear distortion, leading to inefficient power consumption and reduced coverage due to stringent EVM and MPR requirements, which do not account for the capability of advanced receivers to mitigate PA distortion.
Innovation Solution
Implementing a quality-aware uplink power control mechanism that divides the power control range into multiple TX quality classes, allowing UEs to operate with relaxed EVM and MPR requirements based on the receiver's distortion compensation capability, enabling flexible power allocation and improved coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stringent EVM and MPR requirements are applied to ensure signal quality, then receiver performance is improved, but power consumption increases and coverage is reduced
Solution Approach 1:
The patent introduces dynamic adjustment of EVM and MPR parameters based on receiver capability. Advanced receivers with distortion compensation capability are identified and configured with relaxed parameter requirements, while legacy receivers maintain stringent requirements. This parameter change enables power-efficient operation for advanced receivers while preserving reliability for legacy devices.
Solution Approach 2:
The system dynamically determines whether to apply relaxed or stringent EVM/MPR requirements based on real-time detection of receiver capability. The network identifies advanced receivers through capability negotiation and dynamically configures power control parameters accordingly, allowing adaptive power management that optimizes both energy efficiency and signal quality based on actual receiver performance.
2Reliability
If stringent EVM and MPR requirements are applied to ensure signal quality, then receiver performance is improved, but uplink coverage is reduced
Solution Approach 1:
The patent modifies EVM and MPR parameter requirements based on receiver capability classification. Advanced receivers with distortion compensation are granted relaxed parameter settings, enabling them to operate at higher power levels with acceptable signal quality. This parameter adaptation expands the effective uplink coverage area while maintaining receiver performance through capability-based parameter adjustment.
3Use of energy by moving object
If advanced receivers with distortion compensation are deployed, then power efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the user equipment population into advanced receivers with distortion compensation capability and legacy receivers without this capability. This segmentation allows the network to apply different power control parameter sets to different device groups, enabling power-efficient operation for advanced devices while maintaining compatibility with legacy devices, thus managing system complexity through classification and differentiated management.
Solution Approach 2:
The system employs capability negotiation and feedback mechanisms to identify advanced receivers and configure appropriate parameter settings. The network receives capability information from UEs during initial setup or reconfiguration, uses this feedback to determine power control parameters, and adjusts settings accordingly. This feedback-based approach enables automatic adaptation to receiver capabilities, managing complexity through automated detection and configuration.
4Area of stationary object
If higher transmission power is allowed to enhance coverage, then uplink coverage is improved, but signal quality deteriorates due to non-linear distortion
Solution Approach 1:
The patent converts the harmful effect of power amplifier non-linear distortion into a beneficial feature by introducing distortion compensation capability at the receiver. Advanced receivers with this capability can tolerate higher transmit power levels and non-linear distortions, converting what was previously a limiting factor into an enabling feature that expands coverage while maintaining signal quality through active compensation.
Data Source
AI summary
An apparatus includes at least one processor; and at least one memory including computer program code; wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to: determine a transmission power requested with a network node; determine a transmission quality class based on the transmission power requested with the network node; wherein the transmission quality class comprises a predefined maximum power reduction; determine an output power value based on the transmission quality class; determine an uplink transmission power as a minimum of: the output power value, and the transmission power requested with the network node; and transmit an uplink transmission, based on the uplink transmission power.