UE Uplink Power Threshold Control for SAR-Safe Coverage
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Solution Overview
Problem
The increasing electromagnetic radiation from mobile terminal devices with high frequency bands and high power poses a risk to human body safety, and existing methods to reduce this impact, such as power reduction, can compromise uplink coverage.
Innovation Solution
A method for user equipment (UE) and network devices to exchange capability and parameter threshold information for intelligent control of transmit power, allowing the UE to adjust power levels to meet safety standards while maintaining uplink coverage, using methods like RRC signaling and DCI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If output power is reduced to meet SAR or MPE requirements, then human body safety is improved, but uplink coverage capability deteriorates
Solution Approach 1:
The patent implements dynamic transmit power control where the UE adjusts its transmit power based on real-time parameters (distance to gNB, channel conditions, buffer status) while maintaining compliance with MPE limits. The network device dynamically configures parameter thresholds through RRC signaling or DCI, enabling the UE to optimize uplink coverage without exceeding safety limits at any moment.
Solution Approach 2:
The patent changes the parameter of transmit power from a fixed reduced value to a dynamically adjustable value based on multiple parameters including distance to gNB, channel quality, and buffer status. The network device configures parameter thresholds that define the range of acceptable transmit power values, allowing the UE to select optimal power levels that balance coverage and safety compliance.
2Object-affected harmful factors
If uplink duty cycle is reduced to meet MPE requirements, then human body safety is improved, but uplink transmission efficiency deteriorates
Solution Approach 1:
The patent enables dynamic adjustment of transmit power based on real-time conditions, allowing the UE to transmit at higher powers when channel conditions are good or distance to gNB is large, thereby maintaining transmission efficiency while staying within MPE limits. The duty cycle is optimized dynamically rather than uniformly reduced.
Solution Approach 2:
The network device provides feedback through parameter threshold configuration (via RRC or DCI) that guides the UE's transmit power decisions. The UE monitors uplink channel conditions and adjusts power accordingly, creating a feedback loop that maintains both safety compliance and transmission efficiency.
3Object-affected harmful factors
If intelligent control of transmit power is implemented, then compliance with safety standards is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service by enabling the UE to autonomously determine its transmit power based on configured parameter thresholds and monitored channel conditions. The UE independently evaluates distance to gNB, channel quality, and buffer status to select appropriate power levels without requiring continuous network intervention, reducing overall system complexity.
Solution Approach 2:
The patent manages complexity by changing the control parameter from raw transmit power values to parameter thresholds that define acceptable power ranges. The network device configures these thresholds, and the UE uses them to determine actual transmit power, simplifying the control logic while ensuring compliance.
Data Source
AI summary
Provided in the present disclosure are a method and apparatus for transmitting indication information, and a readable storage medium. The method comprises: sending first capability information to a network device, wherein the first capability information is used for indicating whether a user equipment supports intelligent regulation and control of transmission power; in response to the user equipment supporting intelligent regulation and control of the transmission power, receiving indication information sent by the network device, wherein the indication information is used for instructing the user equipment to maintain a parameter threshold value required for uplink transmission; and determining the transmission power of the uplink transmission according to the parameter threshold value.