HPUE Uplink Power Control for SAR-Limited High-Resource Transmission
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Solution Overview
Problem
In 5G NR and LTE systems, high-power UEs (HPUEs) face issues with inappropriate uplink and downlink resource allocation, leading to excessive wireless signal radiation that exceeds the standard Specific Absorption Rate (SAR), posing health risks and compromising uplink transmission performance.
Innovation Solution
A method and device for controlling uplink transmission power in HPUEs by adjusting power levels based on resource allocation thresholds, ensuring that radiation does not exceed SAR limits while maintaining uplink information transmission capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the base station allocates a high uplink resource ratio to HPUE to improve uplink coverage, then uplink coverage is improved, but the UE transmission power becomes excessively high causing SAR exceedance
Solution Approach 1:
The patent implements dynamic power adjustment by introducing a power adjustment parameter that is determined based on the uplink resource ratio. When the uplink resource ratio exceeds a threshold, the system dynamically reduces the uplink transmission power through this adjustment parameter, making the power level adaptive to the resource allocation conditions rather than fixed at high power class levels
Solution Approach 2:
The patent changes the power parameter by introducing a power adjustment parameter that modifies the uplink transmission power based on the uplink resource ratio. This parameter change mechanism allows the system to transition from fixed high-power transmission to variable power transmission, reducing power when resource ratio is high to prevent SAR exceedance
2Productivity
If the UE transmits at high power class 2 (26dBm) to improve uplink transmission capability, then uplink transmission capability is improved, but wireless signal radiation exceeds SAR standards causing health risks
Solution Approach 1:
The system transitions from static high-power transmission to dynamic power adjustment by calculating a power adjustment parameter based on the uplink resource ratio. This enables the UE to maintain high transmission capability when needed while automatically reducing power to safe levels when resource allocation indicates potential SAR exceedance
Solution Approach 2:
The patent implements a feedback mechanism where the uplink resource ratio serves as a control signal that triggers power adjustment. The base station determines the uplink resource ratio and communicates it to the UE, which then uses this information to adjust its transmission power accordingly, creating a closed-loop control system that prevents SAR exceedance
3Productivity
If the base station configures high uplink resource ratio for HPUE mode, then uplink information transmission efficiency is improved, but the UE must reduce power to avoid SAR exceedance which may affect transmission quality
Solution Approach 1:
The patent introduces a power adjustment parameter that is calculated based on the uplink resource ratio to modify the transmission power. This parameter change ensures that when high resource ratios are allocated for improved efficiency, the power is adjusted accordingly to maintain SAR compliance while preserving transmission quality through controlled power reduction
Data Source
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AI summary
The disclosure provides a method and device for controlling uplink transmission power, a base station and user equipment. The method comprises: determining an uplink resource ratio of user equipment in a preset high-power mode; determining power adjustment information if the uplink resource ratio is greater than or equal to a preset uplink proportion threshold corresponding to the preset high-power mode; and sending the uplink resource ratio and the power adjustment information to the user equipment such that the user equipment, when transmitting uplink information according to the uplink resource ratio in the preset high-power mode, controls the uplink transmission power according to the power adjustment information. In the method for controlling uplink transmission power provided in the disclosure, when a UE is being configured to transmit uplink information with to a high uplink resource ratio, the UE can be configured to reduce uplink transmission power according to the power adjustment information, thus effectively avoiding exceeding SAR, and improving the uplink information transmission capability of the UE in a preset high-power transmission mode.