Antenna Grouping Transitions for Time-Averaged RF Exposure Compliance
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Solution Overview
Problem
Wireless communication devices face challenges in maintaining radio frequency (RF) exposure compliance across transitions between different antenna groupings during operation, which can lead to violations of time-averaged RF exposure limits.
Innovation Solution
The wireless device determines and transitions between antenna groupings in real-time to maintain compliance with RF exposure limits by considering the RF exposure history of previous antenna groups, ensuring time-averaged RF exposure compliance across transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wireless device transitions between different antenna groupings during operation, then communication performance is improved, but RF exposure compliance may be violated
Solution Approach 1:
The patent implements dynamic antenna grouping that adapts to changing RF exposure conditions in real-time. The system continuously monitors RF exposure levels and dynamically reconfigures antenna groups to maintain compliance while optimizing communication performance, rather than using static antenna assignments.
Solution Approach 2:
The system employs feedback mechanisms by continuously monitoring RF exposure history and using this information to make informed decisions about antenna group transitions. The RF exposure history serves as feedback that guides the selection of antenna groups that will maintain compliance while improving communication.
2Reliability
If the wireless device maintains strict RF exposure compliance through static antenna grouping, then RF exposure compliance is ensured, but communication performance is limited
Solution Approach 1:
The system transitions from static antenna grouping to dynamic antenna grouping that can adapt to changing conditions. This allows the wireless device to maintain RF exposure compliance while improving communication performance by selecting optimal antenna groups based on real-time RF exposure history and communication requirements.
Solution Approach 2:
The patent changes the parameter of antenna grouping configuration from fixed to variable. By allowing antenna group assignments to change based on RF exposure history and communication needs, the system achieves both compliance maintenance and performance improvement simultaneously.
3Reliability
If the wireless device uses time-averaged RF exposure assessment, then RF exposure compliance is maintained, but transition complexity between antenna groups increases
Solution Approach 1:
The system performs preliminary assessment of RF exposure history before making antenna group transitions. By evaluating the time-averaged RF exposure in advance and planning transitions that maintain compliance, the system reduces the complexity of real-time decision-making during actual transitions.
Data Source
AI summary
Methods and apparatus for radio frequency (RF) exposure compliance across antenna grouping transitions are described. An example method includes transitioning, during a run-time of a wireless device, from operating according to a first transmit scenario with a first set of antenna groups for a plurality of transmit antennas to operating according to a second transmit scenario with a second set of antenna groups, while maintaining compliance with an RF exposure limit across the transition. The transitioning includes determining the second set of antenna groups, such that an RF exposure history associated with the first set of antenna groups for the plurality of transmit antennas is maintained for the second set of antenna groups across the transition. The method also includes transmitting, from at least one transmit antenna in the second set of antenna groups, while operating according to the second transmit scenario.