Dynamic TX Power Allocation for RF Exposure Compliance
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Solution Overview
Problem
Current RF technologies face challenges in dynamically allocating transmitting powers across multiple TX modules of a radio module to achieve optimal data throughput and network capacity while adhering to regulated RF exposure limits, particularly in multi-RAT transmission scenarios.
Innovation Solution
A method involving the mapping of RF exposure limits to TX power limits, with unused TX power from one time interval being stored in a power pool and accessed in subsequent intervals to adjust TX power limits, ensuring compliance with RF exposure regulations and enhancing data throughput and network efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TX power is increased to improve data throughput and network capacity efficiency, then the RF exposure limit may be exceeded causing harmful effects
Solution Approach 1:
The patent implements dynamic TX power allocation that adjusts power limits based on time intervals and accumulated exposure. The system transitions from static power limiting to dynamic adjustment where power limits are modified based on real-time exposure accumulation, allowing higher power when exposure is low and reducing power when exposure approaches limits, thereby optimizing both throughput and compliance
Solution Approach 2:
The system changes the parameter of TX power limit dynamically by introducing a power pool that accumulates unused power capacity over time. The power limit is not fixed but adapts based on the accumulated exposure metric, transforming the static regulatory constraint into a dynamic allocation mechanism that optimizes productivity while managing harmful effects
2Reliability
If TX power is dynamically adjusted to meet RF exposure limits, then data throughput and network capacity efficiency may be reduced
Solution Approach 1:
The system performs preliminary accumulation of unused power capacity during time intervals when TX power is below the limit, storing this capacity in a power pool before it is needed. This preliminary action ensures that when higher throughput is required, the system can draw from accumulated capacity rather than being immediately constrained, thus maintaining both compliance and productivity
Solution Approach 2:
The patent maintains continuous useful action by ensuring that TX power is continuously allocated across multiple modules and time intervals rather than being periodically interrupted. The power pool mechanism ensures uninterrupted power supply by accumulating and redistributing capacity continuously, preventing gaps in data transmission that would reduce network capacity efficiency
3Productivity
If multiple TX modules operate simultaneously to improve productivity, then the total RF exposure may exceed the regulated limit
Solution Approach 1:
The patent segments the total RF exposure limit into time-interval-based power limits for multiple TX modules. Instead of treating all modules uniformly, the system divides the operational timeline into intervals and allocates power limits to each module for each interval based on accumulated exposure, allowing simultaneous operation while distributing the exposure burden across time and modules
Solution Approach 2:
The system merges the power allocation of multiple TX modules into a unified power pool mechanism. The exposure accumulation and power limit adjustment are performed collectively across all modules rather than independently, allowing the system to optimize total productivity while ensuring the combined exposure of all modules remains within regulatory limits through coordinated power management
Data Source
AI summary
A method for dynamically allocating transmitting (TX) powers to multiple TX modules of a radio module includes: for each of the multiple TX modules: mapping a radio frequency (RF) exposure limit to a TX power limit; obtaining a first TX power limit corresponding a first time interval and a second TX power limit corresponding a second time interval, wherein the first time interval is earlier than the second time interval; in response to a TX power corresponding to the first time interval being smaller than the first TX power limit, calculating and storing a value of an unused TX power corresponding the first time interval in at least one power pool within a memory; and in response to a TX power corresponding to the second time interval being larger than the second TX power limit, obtaining the value of the unused TX power from the at least one power pool.