Dynamic Antenna Module Combining Under RF Exposure Limits
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Solution Overview
Problem
Wireless communications systems face challenges in ensuring compliance with RF exposure specifications while maintaining effective antenna gains, particularly when using antennas integrated with displays (AoD) that are used near human tissue, and in varying RF exposure scenarios.
Innovation Solution
Implementing dynamic antenna module combining techniques, where a user equipment (UE) notifies a network entity of RF exposure compliance parameters, enabling or disabling antenna module combining based on transmit power backoff to ensure compliance with RF exposure specifications, and utilizing an AoD in combination with other antenna modules for supplemental beamforming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antenna module combining is enabled to improve antenna gains for mmWave communications, then communication performance is improved, but RF exposure to human tissue increases
Solution Approach 1:
The patent implements dynamic antenna module combining where the network entity receives RF exposure compliance parameters from the UE and dynamically enables or disables antenna module combining based on whether the transmit power backoff meets the compliance threshold. This dynamic adjustment allows the system to optimize communication performance when safe and prevent excessive RF exposure when unsafe, resolving the contradiction between reliability improvement and harmful factor reduction.
2Object-affected harmful factors
If antenna module combining is disabled to ensure RF exposure compliance, then safety is improved, but antenna gains and communication performance deteriorate
Solution Approach 1:
The patent changes the operational parameter of antenna module combining based on the RF exposure compliance parameter. When the transmit power backoff meets the compliance threshold, antenna module combining is enabled to achieve 3-4 dB gains; when it exceeds the threshold, combining is disabled to ensure compliance. This parameter-based control resolves the contradiction by adapting system behavior to safety conditions while maximizing performance when safe.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for dynamic antenna module combining. An example method for wireless communications by an apparatus includes sending a request to enable antenna module combining for communications; and communicating with a network entity via a first type of antenna module and a second type of antenna module with the antenna module combining enabled.