RF Exposure Control Scheme Transition for Wireless Radios
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Solution Overview
Problem
Wireless communication devices with multiple radios face challenges in maintaining RF exposure compliance during transitions between different RF exposure control schemes, leading to potential non-compliance with RF exposure limits.
Innovation Solution
The use of a primary RF exposure control scheme to manage RF exposure when active, and a secondary scheme when the primary is unavailable, along with an applications processor to store and manage RF exposure information, ensures compliance by maintaining and updating exposure limits across active radios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single RF exposure control scheme is used for all radios, then device complexity is reduced, but reliability of RF exposure compliance during scheme transitions deteriorates
Solution Approach 1:
The patent segments the RF exposure control into multiple independent schemes (first RF exposure control scheme and second RF exposure control scheme), each responsible for different sets of radios. This allows the system to maintain compliance during transitions by having specialized control for different radio types while reducing overall complexity through modular design.
Solution Approach 2:
The patent introduces an intermediary mechanism that detects when a radio transitions between different control schemes and actively manages the transition period. This intermediary ensures continuous compliance by coordinating between the first and second RF exposure control schemes during scheme changes, preventing compliance gaps.
2Adaptability or versatility
If multiple RF exposure control schemes are implemented for different radios, then adaptability to various radio types is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal framework where multiple RF exposure control schemes can coexist and be selectively applied to different radios. The system provides multi-functionality by allowing a single device to handle different radio types (e.g., WLAN, Bluetooth, cellular) with appropriate specialized control schemes while maintaining a unified management architecture.
Solution Approach 2:
The patent divides the RF exposure control into separate, specialized schemes for different radio types, allowing each scheme to be optimized for its specific radio technology. This segmentation enables adaptability to various radio types while managing complexity through clear functional separation and selective activation.
3Measurement precision
If RF exposure information is stored and managed by an applications processor, then measurement precision of RF exposure limits is improved, but use of energy by the processor increases
Solution Approach 1:
The patent implements preliminary action by having the applications processor store RF exposure information in advance during periods when the primary RF exposure control scheme is available. This stored information can be retrieved and applied during transitions or when the primary scheme is unavailable, ensuring continuous precise compliance without requiring constant active processing.
Solution Approach 2:
The system implements self-service by enabling the RF exposure control mechanism to maintain precision through stored historical data and automated retrieval during transitions. The applications processor serves itself by utilizing previously stored RF exposure information to maintain compliance during low-power states or transitions, reducing the need for continuous high-energy processing.
Data Source
AI summary
Techniques and apparatus for operating a wireless device pursuant to RF exposure compliance are provided. An example method generally includes: when an RFECS1 of the wireless device is in an online state, controlling, via the RFECS1, at least one of one or more first radios associated with a first RAT or one or more second radios associated with a second RAT, in compliance with an RF exposure limit and based on at least one of first RF exposure information associated with the one or more first radios or second RF exposure information associated with the one or more second radios; and when the RFECS1 is unavailable, controlling, via a second RF exposure control scheme, the one or more second radios associated with the second RAT in compliance with the RF exposure limit and based on third RF exposure information associated with the one or more second radios.