Multi-User Wireless Transmission Power Control via MCS Rate Optimization
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Solution Overview
Problem
In multi-user wireless transmission, the efficiency of packet transmission is reduced due to differing data types among communication devices, as they are often encoded with the same modulation and coding scheme (MCS) rate, leading to incomplete or short data packets.
Innovation Solution
A wireless transmission method that determines a maximum available MCS rate and power amplifier gain for each station, adjusts digital gains to optimize frequency domain signals, and converts them into time domain signals for amplified transmission, allowing for efficient multi-user data transfer while maintaining signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same MCS rate is used for all stations in multi-user transmission, then the system complexity is reduced, but the transmission efficiency deteriorates due to incomplete or short data packets
Solution Approach 1:
The patent assigns different MCS rates to different stations based on their individual requirements. Each station's data is encoded with an MCS rate selected from a set of available MCS rates, allowing each station to receive data packets of appropriate length and completeness according to its specific needs, thereby resolving the contradiction between system complexity and transmission efficiency.
2Productivity
If different MCS rates are assigned to each station, then the transmission efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent changes the MCS rate parameter for each station individually. The access point selects MCS rates from a predetermined set based on each station's characteristics and data requirements, enabling efficient transmission without requiring complex real-time adjustments. This approach improves transmission efficiency while keeping the system manageable through standardized parameter selection.
3Productivity
If data packets are transmitted with varying lengths for different stations, then the transmission efficiency is improved, but the power control complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the access point determines the MCS rate for each station based on their individual data requirements and transmission characteristics. This feedback loop allows the system to adjust power allocation and MCS rate assignment dynamically, ensuring that each station receives appropriately sized data packets while maintaining manageable power control through systematic decision-making.
Data Source
AI summary
A wireless transmission method includes obtaining an MCS (modulation and coding scheme) rate and a power amplifier gain of each station in a set of stations for a multi-user (MU) transmission, generating a maximum available MCS rate according to a plurality of MCS rates of the set of stations, selecting a power amplifier gain of the MU transmission according to the maximum available MCS rate, adjusting a digital gain of each station according to the power amplifier gain of the MU transmission and the power amplifier gain of each station, adjusting a frequency domain signal of each station according to the digital gain thereof, converting a plurality of adjusted frequency domain signals of the set of stations into a time domain signal, and generating an amplified signal for the MU transmission according to the power amplifier gain of the MU transmission and the time-domain signal.