WLAN Link Adaptation Using Interference Source Recognition
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Solution Overview
Problem
Existing link adaptation techniques in wireless communication systems do not adequately consider interference from various wireless devices using unlicensed bands, leading to suboptimal communication quality due to cross-technology interference.
Innovation Solution
A method and apparatus for recognizing interference sources and applying tailored link adaptation techniques based on the channel access methods of different wireless standards, such as WiFi, Bluetooth, and ZigBee, by analyzing channel use patterns and adjusting transmission power and modulation and coding schemes accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing link adaptation techniques are used that only consider channel states (e.g., RSSI values), then the system complexity remains low, but communication quality deteriorates due to unaddressed cross-technology interference from devices like Bluetooth and ZigBee
Solution Approach 1:
The patent segments interference sources into different categories (WiFi, Bluetooth, ZigBee, and other devices) based on their channel access methods. By classifying interference sources according to their wireless technology type, the system can apply differentiated link adaptation strategies for each category, improving communication quality without requiring completely new complex algorithms.
Solution Approach 2:
The patent changes the parameters considered in link adaptation by introducing channel access method analysis alongside traditional channel state metrics. The system adjusts transmission parameters (power, modulation, coding) based on both RSSI values and the identified interference source type, creating a more comprehensive adaptation mechanism that addresses cross-technology interference.
2Reliability
If link adaptation is performed without considering different access techniques of wireless standard devices, then the ease of operation is maintained, but communication quality deteriorates due to interference from devices using unlicensed bands
Solution Approach 1:
The patent implements self-service by enabling the wireless communication device to automatically identify and classify interference sources based on their channel access patterns. The system autonomously analyzes received signals, determines the technology type of interfering devices, and adjusts its transmission parameters accordingly without requiring manual configuration or complex external control.
Solution Approach 2:
The patent modifies the link adaptation parameters by incorporating interference source classification into the existing adaptation framework. The system changes how transmission power and modulation schemes are selected by considering both traditional channel quality metrics and the identified interference source characteristics, improving communication quality while maintaining automated operation.
3Productivity
If uniform link adaptation is applied to all interference sources, then the device complexity remains low, but productivity deteriorates due to suboptimal data rates and frequency efficiency
Solution Approach 1:
The patent segments the interference environment into distinct categories based on wireless technology type (WiFi, Bluetooth, ZigBee, others). By dividing interference sources into these segments, the system can apply optimized link adaptation strategies for each category, maximizing data rates and frequency efficiency for each interference scenario without requiring completely separate analysis systems.
Solution Approach 2:
The patent changes the link adaptation parameters dynamically based on the classified interference source type. The system adjusts transmission power, modulation schemes, and coding rates according to the specific interference characteristics of each wireless technology category, thereby optimizing productivity (data rate and frequency efficiency) for different interference conditions.
Data Source
AI summary
A link adaptation method in a wireless LAN (WLAN) system may be provided.The link adaptation method according to an embodiment of the present disclosure may include: receiving signals within a communication environment; classifying the signals and identifying each of the signals; analyzing a channel access characteristic of each of the signals; adjusting a communication parameter of a target signal for each channel based on a result of the analyzing.