Uplink CQI Generation for Wireless Communication Optimization
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Solution Overview
Problem
Current wireless communication standards, such as IEEE 802.11ax, do not define channel quality indicator (CQI) sounding for uplink transmissions, leading to inefficiencies in uplink transmission optimization.
Innovation Solution
A wireless communication device and method that includes an uplink setting circuit, CQI updating circuit, and uplink-transmission-setting decision circuit to determine and adjust uplink transmission settings based on channel state information and error correction techniques, improving uplink performance by generating a target CQI and transmitting control signals to communication partners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CQI sounding is implemented for uplink transmission, then uplink transmission performance is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by having the access point pre-calibrate uplink channel quality indicators before actual uplink transmission. The AP sends calibration requests to stations, collects channel state information, and pre-computes CQI values that will be used for subsequent uplink resource allocation and modulation and coding scheme selection. This preliminary CQI acquisition enables optimized uplink transmission without adding complexity during the actual data transmission phase.
Solution Approach 2:
The patent implements self-service by enabling the access point to autonomously determine uplink transmission parameters using pre-acquired channel quality information. The AP independently performs uplink resource unit allocation, selects modulation and coding schemes, and adjusts transmission power based on the pre-calibrated CQI values, without requiring real-time feedback loops or complex coordination with stations during uplink transmission.
2Use of energy by moving object
If uplink closed-loop power control is implemented, then transmission power efficiency is improved, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by performing power control parameter calibration before uplink transmission. The access point pre-determines target received signal strength indicators and power adjustment factors based on channel conditions, then uses these pre-computed values to control station transmission power. This eliminates the need for complex real-time power negotiation during uplink data transmission.
Solution Approach 2:
The patent implements feedback by having stations report channel state information and received signal strength measurements to the access point. The AP uses this feedback to adjust uplink power control parameters, creating a closed-loop system that optimizes transmission power while maintaining simplicity through centralized control at the access point.
Data Source
AI summary
A wireless communication method for optimizing uplink transmission from a communication partner to a wireless communication device includes the following steps: after receiving an uplink performance estimation, determining uplink adjustment information including resource unit allocation and a target received signal strength indicator according to the uplink performance estimation; generating a target channel quality indicator (CQI) according to previous uplink sounding information and the uplink adjustment information, wherein the previous uplink sounding information indicates the characteristics of the uplink transmission; determining uplink transmission setting including a modulation and coding scheme and dual carrier modulation according to the target CQI and the type of an error correction technique and transmitting a control signal to a communication partner according to the uplink transmission setting; and updating the uplink performance estimation according to a reception signal from the communication partner, wherein the characteristic of the reception signal is affected by the uplink transmission setting.