RF Emission Control via Power Unit Accumulation
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Solution Overview
Problem
The dynamic changes in radio frequency (RF) emissions due to beam-forming in 4G and 5G mobile technologies pose challenges in maintaining time-averaged RF exposure within regulatory limits, as existing compliancy boundaries are based on static emissions.
Innovation Solution
A method and apparatus for controlling RF emissions by maintaining a number of power units below a maximum within a time interval, where power units represent radiated power, and adjusting these units based on current and determined power needs for data transmission, using a power unit accumulation rate and ring buffers to manage and prioritize transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beam-forming is introduced to dynamically change RF intensity and direction based on user traffic and UE positions, then data transmission efficiency is improved, but RF exposure compliance becomes difficult to maintain within regulatory limits
Solution Approach 1:
The system pre-calculates and maintains a running total of radiated power before actual transmission occurs. By maintaining a cumulative power sum across multiple time intervals and comparing it against regulatory limits in advance, the system can determine whether transmission is permitted before it happens, rather than dealing with compliance issues after transmission. This preliminary calculation approach enables dynamic beam-forming while ensuring regulatory compliance.
Solution Approach 2:
The system continuously monitors the cumulative radiated power and compares it against regulatory limits, using this feedback to control whether transmission occurs. The running total of radiated power provides real-time feedback that adjusts transmission decisions dynamically, allowing the system to maximize data transmission efficiency while maintaining RF exposure compliance based on actual accumulated exposure levels.
2Device complexity
If static compliancy boundaries are used for RF emissions, then regulatory compliance is simplified, but dynamic beam-forming capabilities are restricted
Solution Approach 1:
The system transitions from static compliancy boundaries to dynamic control by maintaining a running total of radiated power that updates continuously across multiple time intervals. This dynamic approach allows beam-forming flexibility to adapt to changing user traffic and UE positions while ensuring that the cumulative RF exposure remains within regulatory limits. The compliancy boundary becomes a dynamic threshold based on actual accumulated exposure rather than a fixed static limit.
3Object-affected harmful factors
If the number of power units is maintained below a maximum within a time interval, then RF exposure compliance is achieved, but data transmission capacity is limited
Solution Approach 1:
The system divides time into discrete intervals and maintains the cumulative radiated power within limits over each interval period. By allowing transmission in periodic cycles while monitoring the running total, the system can maximize data transmission capacity within each time interval while ensuring RF exposure compliance is maintained across the broader time window. This periodic approach enables burst transmission patterns that optimize capacity while respecting cumulative exposure limits.
Data Source
AI summary
The present subject matter relates to a method for controlling radio frequency, RF, emissions, including maintaining a number of power units below a maximum number within a time interval, wherein a power unit of the power units is indicative of an amount of radiated power for transmission of data. A data element to be transmitted may be received during the time interval. A number of the power units representing an amount of radiated power for the transmission of the data element may be determined. The data element may be transmitted depending on the current maintained number of power units and the determined number. The current maintained number of power units may be decreased by the determined number of power units if the data element is transmitted.