Dynamic Transmission Power Limits Under Exposure Constraints
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Solution Overview
Problem
Wireless communication devices face inefficiencies in managing transmission power to meet regulatory requirements for human exposure, often leading to excessive reductions in transmission power that can result in reduced communication reliability and efficiency.
Innovation Solution
The device dynamically sets a maximum transmission power limit based on ongoing and previous transmission power consumption, considering duty cycles of executing processes to optimize power usage while adhering to regulatory limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission power is increased to ensure sufficient signal quality at the recipient, then communication reliability is improved, but regulatory requirements for human exposure may be exceeded
Solution Approach 1:
The patent implements dynamic transmission power adjustment by continuously monitoring residual power from previous transmissions and calculating appropriate power levels for current transmissions. The system transitions from static power limiting to dynamic power management, where the maximum transmission power is adjusted in real-time based on accumulated power usage over time windows, enabling higher peak powers while maintaining compliance with average power limits.
Solution Approach 2:
The system changes the parameter of transmission power from a fixed limit to a dynamically calculated value based on residual power. By computing remaining power headroom as the difference between average power limits and actual power consumption over time windows, the system adapts transmission power parameters to maximize communication reliability while staying within regulatory exposure limits.
2Object-affected harmful factors
If transmission power is decreased to comply with regulatory requirements, then human exposure limits are met, but transmission power efficiency is reduced
Solution Approach 1:
The patent employs feedback mechanisms by monitoring actual transmission power consumption and calculating residual power based on previous transmissions. The system uses this feedback to dynamically adjust maximum transmission power for subsequent transmissions, ensuring compliance with average power limits while maximizing energy utilization. The feedback loop continuously updates the power budget based on real-world usage patterns.
Solution Approach 2:
The system performs self-service by autonomously managing its own power budget without external intervention. The device calculates its own residual power, determines appropriate transmission power levels, and adjusts its transmission strategy independently based on accumulated power consumption data, enabling efficient self-regulation within regulatory constraints.
3Object-affected harmful factors
If a static maximum transmission power limit is applied, then regulatory compliance is simplified, but communication performance is degraded due to excessive power reduction
Solution Approach 1:
The patent replaces static power limiting with dynamic power management that adapts to actual transmission patterns. By calculating residual power based on time-weighted accumulation of previous transmissions and adjusting maximum power accordingly, the system enables higher communication performance during periods when power budget allows, while maintaining simplified regulatory compliance through automated average power limit enforcement.
Data Source
AI summary
A wireless communication device receives an average transmission power limit for a time period, and determines a first MTPL for a first time of the time period by setting the first MTPL to the average transmission power limit. The wireless communication device then transmits a signal at the first time using a first transmission power not to exceed the first MTPL. If the first transmission power is less than the first MTPL, then the wireless communication device determines residual transmission power based on a difference between the first MTPL and the first transmission power. The wireless communication device determines a second MTPL for a second time of the time period by adding the residual transmission power to the first MTPL. The wireless communication device then transmits a signal at the second transmission power not to exceed the second MTPL.