Wireless Radio Path Loss Correction for Beamforming Scan Loss
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Solution Overview
Problem
Beamforming in wireless communication systems results in scan losses, leading to a discrepancy between transmission and reception power, which affects transmission efficiency and resource block allocation.
Innovation Solution
A wireless radio system with compensation circuitry adjusts transmission power by a scan loss adjustment amount, and includes calculation and reporting circuitry to correct path loss measurements, ensuring accurate resource block allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If transmission power is adjusted by scan loss adjustment amount to compensate for beamforming losses, then transmission power is improved, but discrepancy between transmitted signal power and received signal power increases
Solution Approach 1:
The patent changes the path loss measurement parameter by applying the scan loss adjustment amount as a correction factor. The UE measures path loss based on the adjusted transmission power (original transmission power plus scan loss adjustment amount) rather than the original transmission power, thereby aligning the measurement with the actual compensated transmission conditions.
Solution Approach 2:
The system implements feedback by having the UE report the adjusted path loss measurement to the base station. The base station uses this feedback to make informed decisions about resource block allocation and power control, creating a closed-loop system that continuously optimizes transmission based on actual channel conditions.
2Productivity
If scan loss adjustment amount is applied to outgoing signal, then transmission efficiency is improved, but resource block allocation accuracy deteriorates
Solution Approach 1:
The patent modifies the path loss measurement parameter by incorporating the scan loss adjustment amount. This corrected path loss value reflects the actual transmission conditions after compensation, enabling the base station to accurately allocate resource blocks based on true channel characteristics rather than distorted measurements.
Solution Approach 2:
The UE reports the adjusted path loss measurement to the base station, creating a feedback mechanism that allows the base station to optimize resource block allocation. This feedback loop ensures that resource allocation decisions are based on accurate, compensation-adjusted measurements, maintaining allocation accuracy while benefiting from scan loss compensation.
3Adaptability or versatility
If beamforming is used to transmit wireless signals, then directional transmission capability is improved, but scan losses occur causing power reduction
Solution Approach 1:
The patent applies the scan loss adjustment amount as a counterbalancing mechanism. When beamforming causes power reduction in certain directions, the system compensates by adding the scan loss adjustment amount to the transmission power calculation, effectively counterweighting the negative effect of scan losses and maintaining consistent transmission performance across different beam directions.
Data Source
AI summary
There is provided a wireless radio system comprising compensation circuitry to adjust, based on a scan loss of an outgoing signal due to beamforming, a transmission power of the outgoing signal by a scan loss adjustment amount to produce an adjusted signal. Transmission circuitry transmits the adjusted signal and reception circuitry receives an incoming signal at a reception power. Calculation circuitry performs a calculation of a path loss based on a difference between the transmission power and the reception power and adjusts the path loss. Reporting circuitry reports an indication of the path loss adjusted by the calculation circuitry to the base station. The calculation circuitry adjusts the path loss based on the scan loss adjustment amount.