Uplink Beam Management for MPE Compliance
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Solution Overview
Problem
In multi-antenna systems, the existing methods for managing uplink transmit beams do not effectively distinguish between beams directed at a human body and those not, leading to unnecessary power reduction, which can degrade system performance and violate maximum permissible exposure (MPE) safety limits.
Innovation Solution
A method where a terminal device reports information associated with reference signal resources to a network device, allowing the network to perform beam management and optimize uplink transmit beam selection based on the reported information, thereby reducing the impact on system performance and ensuring MPE compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If power reduction is performed based on whether the uplink transmit beam is facing a human body, then MPE safety limits are satisfied, but system performance deteriorates due to unnecessary power reduction
Solution Approach 1:
The patent applies local quality by differentiating power reduction actions based on the specific spatial relationship between the transmit beam and human body. Instead of uniform power reduction across all beams, the system selectively applies power reduction only to beams that are determined to be facing a human body through sensor detection and beam mapping, thereby maintaining high power for beams that do not pose MPE risks and preserving overall system performance.
2Productivity
If existing beam management methods are used without distinguishing beam direction, then system performance is maintained, but MPE safety limits are violated
Solution Approach 1:
The patent implements feedback by using sensors to detect the relative position and orientation of the terminal device with respect to the human body, mapping this physical state to identify which uplink transmit beams are facing the human body. This feedback loop enables dynamic adjustment of power reduction decisions based on real-time spatial information, ensuring MPE compliance while minimizing impact on system performance.
3Productivity
If reporting information about reference signal resources is implemented, then beam management efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies self-service by enabling the terminal device to autonomously perform sensor-based detection, beam mapping, and determination of which beams face the human body. The terminal device independently generates and reports the necessary information to the network device without requiring complex network-side processing or additional infrastructure, thereby improving beam management efficiency while keeping the added complexity localized to the terminal.
Data Source
AI summary
The embodiments of the present disclosure provide information transmission methods and apparatuses, and a communication device. The method includes: sending reporting information including at least one first information that is associated with at least one reference signal resource to a network device by a terminal device.