Dynamic Power Allocation for Multi-Radio Wireless Devices
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Solution Overview
Problem
Wireless devices with multiple radios or antennas face performance issues due to fixed power allocation limits, which can result in suboptimal performance when not all antennas are transmitting at full power.
Innovation Solution
The system dynamically reallocates power limits among multiple antennas or radios in a wireless device, allowing for adjustments based on the actual power levels of each transmission, thereby optimizing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed fraction of the total power limit is allocated to each radio or antenna, then regulatory compliance is ensured, but performance is degraded when not all antennas are transmitting at full power
Solution Approach 1:
The patent implements dynamic power allocation where the power limit for each radio is adjusted in real-time based on the actual power consumption of other radios. When a radio transmits at less than its allocated power, the unused power capacity is dynamically reallocated to other active radios, enabling the system to operate closer to the total power limit while maintaining regulatory compliance.
Solution Approach 2:
The system continuously monitors the actual power transmission levels of all radios and uses this feedback to adjust power allocations. The power limit for each radio is dynamically updated based on feedback about current power usage, allowing the system to optimize performance while ensuring the total power remains within regulatory limits.
2Device complexity
If each antenna is allocated a fixed power level, then power distribution is simplified, but total power utilization is suboptimal
Solution Approach 1:
The patent transitions from static fixed power allocation to dynamic power allocation. The power limit for each radio is no longer fixed but is continuously adjusted based on the actual power consumption of other radios, enabling the system to fully utilize the total power limit while maintaining manageable complexity through automated real-time adjustments.
3Productivity
If one antenna transmits at full power assuming others are also at full power, then individual radio performance is maximized, but total power efficiency is reduced
Solution Approach 1:
The patent recovers unused power capacity that would otherwise be wasted. When a radio transmits at less than its allocated power, the unused power capacity is not discarded but is instead reallocated to other active radios, ensuring that the total power limit is fully utilized and minimizing energy waste.
Data Source
AI summary
A system and method for controlling radiated power. In some embodiments, a device includes: a first radio; a second radio; and one or more processors; and a memory storing instructions which, when executed by the one or more processors, cause performance of: determining that a first transmission, of the first radio, is transmitted at a first power level greater than zero and less than a first threshold, and in response to determining that the first transmission of the first radio is transmitted at a first power level less than the first threshold, causing the second radio to transmit a second transmission at a second power level, wherein the second power level is determined based at least in part on the first power level and the first threshold.