RF Exposure Scheduling Between Time-Averaged Radio Transmissions
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Solution Overview
Problem
Existing wireless devices face challenges in complying with RF exposure limits due to simultaneous transmissions from time-averaged and non-time-averaged radio technologies, leading to non-compliance and reduced transmission power across all technologies.
Innovation Solution
Implementing a processor-controlled system that manages transmission delays and power limits for non-time-averaged technologies based on the RF exposure profiles of time-averaged technologies to optimize RF exposure margins and ensure compliance with regulatory limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple transmitters operate simultaneously with different RF exposure technologies, then transmission productivity is improved, but RF exposure compliance deteriorates
Solution Approach 1:
The patent implements periodic action by introducing wait times between transmissions from different transmitters. When a first transmitter using time-averaged RF exposure technology completes transmission, a second transmitter using non-time-averaged technology waits for a predetermined period before transmitting. This periodic timing pattern ensures that peak exposures from different technologies do not coincide, maintaining RF exposure compliance while allowing both transmitters to operate.
Solution Approach 2:
The patent applies dynamics by dynamically adjusting the transmission power of the second transmitter based on the operational state of the first transmitter. When the first transmitter is active, the second transmitter reduces its peak power to a limited level. When the first transmitter is inactive, the second transmitter can transmit at full power. This dynamic power adjustment ensures compliance while maximizing transmission productivity.
2Reliability
If transmission power is limited for RF exposure compliance, then RF exposure compliance is improved, but transmission power deteriorates
Solution Approach 1:
The patent implements dynamic power management where the transmission power of each transmitter is adjusted in real-time based on the operational state of other transmitters. The second transmitter dynamically reduces power to a limited peak power when the first transmitter is active, but can transmit at full power when the first transmitter is inactive. This dynamic approach maintains compliance while maximizing overall transmission power capability.
Solution Approach 2:
The patent applies preliminary action by pre-establishing power limit settings for the second transmitter based on predicted or detected activity of the first transmitter. The processor configures the second transmitter to automatically apply limited peak power during periods when the first transmitter is expected to be active, ensuring compliance is maintained without requiring real-time power adjustments during transmission.
3Reliability
If wait time is introduced between transmissions, then RF exposure compliance is improved, but transmission time deteriorates
Solution Approach 1:
The patent implements periodic action by introducing structured wait times between transmissions from different transmitters. The second transmitter waits for a predetermined period after the first transmitter completes transmission before initiating its own transmission. This periodic timing ensures RF exposure compliance by preventing simultaneous peak exposures, while the wait time is optimized to be the minimum necessary to achieve compliance.
Data Source
AI summary
In certain aspects, a method for wireless communication includes transmitting a first transmission with a first transmitter operable according to a first radio technology, and transmitting a second transmission with a second transmitter after completion of the first transmission, the second transmitter operable according to a second radio technology. The method may also include delaying transmission of the second transmission by a predetermined wait time after completion of the first transmission if the first radio technology is a radio frequency (RF) exposure time-averaged technology and the second radio technology is a non-time-averaged RF exposure technology. The method may also include transmitting the second transmission with a limited peak power for a predetermined time period for at least a portion of the second transmission if the first radio technology is a non-time-averaged RF exposure technology and the second radio technology is a time-averaged RF exposure technology.