Wireless Communication Management Apparatus for IoT Terminal MCS Selection
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Solution Overview
Problem
In wireless LAN systems, the conventional method of selecting a modulation and coding scheme (MCS) based on signal-to-interference and noise ratio (SINR) without considering the unique characteristics of each IoT terminal can lead to unnecessary reduction in MCS, resulting in biased error rates.
Innovation Solution
A wireless communication management apparatus with a correction unit to adjust error rates based on terminal characteristics, an evaluation unit to assess the corrected error rates, and a determination unit to select an optimal MCS for each terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MCS is controlled for each IoT terminal based on conventional SINR calculation, then communication adaptation to individual terminals is achieved, but error rate bias occurs due to terminal characteristics leading to unnecessary MCS reduction
Solution Approach 1:
The patent applies local quality by introducing terminal-specific correction values that are uniquely tailored to each IoT terminal's characteristics. The correction unit stores and applies individual correction values (e.g., -0.5 to +1.5) to the SINR of each terminal based on its unique properties such as antenna gain, receiver sensitivity, and transmission power, thereby achieving precise local adaptation without affecting other terminals.
Solution Approach 2:
The patent changes the SINR parameter by adding a correction value to the originally calculated SINR to obtain a corrected SINR. This parameter transformation compensates for terminal characteristics and eliminates error rate bias, allowing for more accurate MCS selection that reflects the true communication quality for each terminal.
2Device complexity
If conventional SINR-based MCS selection is used, then simple calculation is maintained, but terminal characteristic biases are not considered resulting in suboptimal MCS selection
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing correction values for each terminal based on their characteristics before actual communication occurs. These correction values are prepared in advance and stored in the correction unit, so that during communication, only a simple addition operation is needed to obtain the corrected SINR, maintaining low computational complexity while improving accuracy.
Solution Approach 2:
The system performs self-service by automatically determining and applying terminal-specific correction values without requiring manual intervention or complex real-time analysis. The correction unit autonomously selects the appropriate correction value for each terminal based on pre-established characteristics, enabling efficient MCS selection that accounts for terminal specifics.
Data Source
AI summary
A wireless communication management apparatus (100) includes a correction unit (1131), an evaluation unit (1132), and a determination unit (1133). The correction unit (1131) corrects, on the basis of a characteristic of each terminal, an error rate in wireless communication between a base station and the terminal based on wireless environment information collected from one or more terminals configured to wirelessly communicate with the base station. The evaluation unit (1132) evaluates the corrected error rate. The determination unit (1133) determines a modulation/demodulation scheme for each terminal on the basis of the evaluation result of the evaluation unit.