Wireless Transceiver Power Control Using PER Feedback
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Solution Overview
Problem
Existing wireless communication systems face challenges in optimizing transmission power settings for various user scenarios without introducing side effects, as pre-defined power levels are not optimal for different channel types, attenuations, receiver devices, and data modulations, affecting signal quality and power consumption.
Innovation Solution
A method and apparatus for wireless transceiver devices that utilize packet-error-rate (PER)-based transmitted power trials to dynamically adjust transmission power based on PER detection results, optimizing power for coverage extension and low power consumption by determining optimal power levels that meet EVM and SNR requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If higher transmitted power is used to extend coverage and improve signal strength, then receiver signal strength is improved, but RF circuit characteristic causes EVM degradation which offsets the benefits
Solution Approach 1:
The patent dynamically adjusts transmission power parameters based on detected packet error rates and channel conditions. The system changes power levels from fixed pre-defined values to adaptive values that optimize both signal strength and EVM performance, resolving the contradiction between coverage extension and signal quality maintenance
Solution Approach 2:
The patent implements a feedback mechanism where the transmitter monitors packet error rates at the receiver and uses this information to adjust transmission power. This closed-loop control allows the system to find optimal power levels that maintain both sufficient signal strength and acceptable EVM, preventing EVM degradation from offsetting coverage benefits
2Reliability
If higher transmitted power is used to ensure sufficient SNR for data rate, then data rate reliability is improved, but power consumption increases excessively
Solution Approach 1:
The patent dynamically adjusts transmission power parameters based on actual channel conditions and PER measurements. Instead of using fixed high power levels to guarantee SNR, the system adapts power to the minimum necessary level that maintains reliable data transmission, thereby reducing excessive power consumption while ensuring data rate reliability
Solution Approach 2:
The patent avoids excessive power transmission by using only the minimum necessary power required for reliable communication. The PER-based adaptation mechanism prevents over-transmission of power, allowing the system to achieve data rate reliability without the excessive power consumption associated with fixed high power settings
3Device complexity
If pre-defined fixed transmitted power is used for simplicity, then device complexity is reduced, but the power setting is not optimal for all user scenarios and channel conditions
Solution Approach 1:
The patent transforms the static pre-defined power settings into a dynamic adaptive power control mechanism. The system automatically adjusts transmission power based on real-time PER detection and channel conditions, enabling optimization for various user scenarios without requiring complex manual configuration or multiple fixed power modes
Solution Approach 2:
The patent implements self-service power optimization where the wireless device automatically adapts its transmission power based on PER feedback from the receiver. This autonomous mechanism eliminates the need for complex external power control systems while achieving optimal power settings for different scenarios, as the device self-adjusts based on actual communication conditions
Data Source
AI summary
A method for performing transmission power management of a wireless transceiver device within a wireless communication system with aid of packet-error-rate-based (PER-based) transmitted power trial and associated apparatus are provided. The method may include: transmitting at least one first packet with at least one first transmitted power from the wireless transceiver device to another device, for monitoring at least one packet error rate (PER) of the at least one first packet at the other device; and transmitting a second packet with a second transmitted power from the wireless transceiver device to the other device based on a PER detection result, the PER detection result comprising any PER among the at least one PER of the at least one first packet.