Multi-Radio Transmit Energy Allocation Under RF Exposure Limits
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Solution Overview
Problem
Maintaining RF exposure compliance is difficult in wireless devices with multiple radios due to challenges in managing transmit power across multiple wireless communication connections, leading to reduced uplink throughput when energy inefficiencies occur.
Innovation Solution
Dynamic allocation of transmit power across multiple wireless communication connections based on relative energy efficiency, ensuring compliance with regulatory constraints like SAR and MPE by prioritizing more energy-efficient connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmit power is increased to maintain uplink throughput, then communication performance is improved, but RF exposure compliance becomes difficult to maintain
Solution Approach 1:
The system dynamically changes transmit power parameters across multiple radios based on energy efficiency measurements. By adjusting power allocation parameters in real-time, the system maintains uplink throughput while ensuring RF exposure compliance through adaptive parameter optimization.
Solution Approach 2:
The patent implements dynamic power allocation that adapts to changing channel conditions and energy efficiency metrics. The system continuously monitors and adjusts transmit power dynamically across different radios, transforming static power management into a dynamic optimization process that balances throughput and compliance.
2Reliability
If energy is allocated to less efficient connections, then connectivity is maintained, but overall energy efficiency deteriorates
Solution Approach 1:
The system applies different energy allocation strategies to different radios based on their individual energy efficiency characteristics. By treating each radio connection locally and differently according to its specific performance, the system maintains connectivity across all connections while optimizing overall energy efficiency through differentiated resource allocation.
Solution Approach 2:
The patent implements a feedback mechanism that measures energy efficiency of each radio connection and uses this information to adjust power allocation. The system continuously monitors energy efficiency metrics and feeds this information back into the power allocation decision-making process, creating a closed-loop control system that optimizes energy usage while maintaining connectivity.
3Ease of operation
If power is equally distributed across multiple radios, then simplicity is maintained, but uplink throughput is reduced due to energy inefficiencies
Solution Approach 1:
The system performs preliminary measurements of energy efficiency for each radio connection before making power allocation decisions. By gathering energy efficiency data in advance and using it to guide power distribution, the system avoids simple equal allocation while maintaining manageable complexity through a structured measurement-and-respond approach.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for transmit energy allocation. A method that may be performed by a wireless device includes establishing first and second wireless communication connections and allocating an available energy between the first and second wireless communication connections by: allocating a first portion of the available energy to the first wireless communication connection based at least in part on one or more functionalities associated with the first wireless communication connection; allocating a second portion of the available energy to the second wireless communication connection based at least in part on one or more functionalities associated with the second wireless communication connection; and allocating a third portion of the available energy to the first and/or the second wireless communication connections based at least in part on energy efficiencies of the first and second wireless communication connections.