Dynamic MCS Adjustment for Wireless Interference Suppression
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Solution Overview
Problem
The existing wireless communication devices face throughput deterioration and instability due to radio-wave interference, as the Modulation and Coding Scheme (MCS) set based on initial Signal to Interference plus Noise Ratio (SINR) becomes inappropriate when interference power changes during transmission.
Innovation Solution
A wireless communication device that detects interference signals and dynamically adjusts the MCS based on real-time interference power, changing the scheme after the interference signal's transmission ends, using estimated interference power to set a new MCS for improved resistance against radio-wave interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the MCS is set on the basis of the SINR at the starting time of transmission, then the resistance against radio-wave interferences is increased at the beginning, but the MCS becomes inappropriate when interference power changes during transmission, causing throughput deterioration
Solution Approach 1:
The patent applies dynamics by making the MCS changeable during transmission rather than fixed. The control section dynamically adjusts the MCS from a first value to a second value based on changing interference conditions, allowing the system to adapt to varying SINR levels throughout the transmission period and maintain both reliability and throughput.
Solution Approach 2:
The patent changes the MCS parameter in response to interference power changes. When the interference signal ends or interference power decreases, the system transitions from a conservative first MCS to a more aggressive second MCS, optimizing throughput while maintaining reliability through parameter adaptation.
2Productivity
If the wireless communication device starts transmission when detecting an interference signal with intensity equal to or less than a threshold, then the usage efficiency of the medium is improved, but the communication becomes unstable due to changing interference power
Solution Approach 1:
The patent uses feedback by continuously monitoring interference power during transmission and adjusting the MCS accordingly. The control section detects changes in interference conditions and modifies transmission parameters in real-time, providing feedback control that maintains communication stability while allowing medium usage efficiency to improve through SR technology.
3Reliability
If the MCS is changed based on real-time interference power, then the resistance against radio-wave interferences is maintained, but the device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-defining multiple MCS values and their corresponding interference power thresholds. The control section compares detected interference power against these predetermined thresholds to select the appropriate MCS, avoiding complex real-time calculations and reducing control complexity while maintaining reliable interference resistance.
Data Source
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AI summary
In a communication system in which wireless signals are transmitted and received, any trouble caused by radio-wave interferences is suppressed. A wireless communication device includes a control section and a communication section. In the wireless communication device, in the case of detecting an interference signal which interferes with a wireless signal, the control section sets a modulation and coding scheme on the basis of interference power of the interference signal. The communication section starts transmission of the wireless signal by the set modulation and coding scheme, and changes the modulation and coding scheme after passage of a change timing substantially matching a timing at which transmission of the interference signal ends.