Composite LQI Measurement for Wireless Link Adjustment
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Solution Overview
Problem
Existing wireless network technologies rely on RSSI-based LQI measurements, which fail to differentiate between strong signal levels due to desired signals and interfering blocker signals, leading to inadequate link quality management.
Innovation Solution
The implementation of composite LQI measurements, which combine RSSI and SNR measurements, along with additional parameters like symbol correlation magnitudes and LQI bias, to effectively adjust communication links in wireless networks, distinguishing between desired and interfering signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RSSI-based LQI measurements are used to determine link quality, then the measurement process is simple, but the link quality assessment is inaccurate because it cannot differentiate between desired signals and interfering blocker signals
Solution Approach 1:
The patent combines multiple measurement parameters (RSSI, SNR, and symbol correlation magnitude) into a composite LQI measurement. This merging of multiple indicators allows the system to differentiate between desired signals and interfering blocker signals, thereby improving link quality assessment accuracy while managing the complexity through integrated processing.
2Measurement precision
If composite LQI measurements combining multiple parameters are implemented, then link quality assessment accuracy improves, but the device complexity increases
Solution Approach 1:
The patent introduces an intermediary processing mechanism that takes multiple input parameters (RSSI, SNR, symbol correlation) and transforms them into a unified composite LQI value. This intermediary layer manages the complexity by providing a structured approach to combining multiple measurements, making the system more manageable while maintaining high assessment accuracy.
3Reliability
If network nodes adjust communication links frequently based on LQI measurements, then link quality management improves, but the network overhead and energy consumption increase
Solution Approach 1:
The patent implements link adjustments based on composite LQI measurements that combine multiple parameters including symbol correlation magnitude. By using this more comprehensive measurement approach, the system can make more informed decisions about when adjustments are truly necessary, avoiding unnecessary adjustments and thereby reducing energy consumption while maintaining reliable link quality management.
Data Source
AI summary
Methods and systems are disclosed to adjust communication links within wireless networks based upon composite link quality indicators (LQIs). Packet communications are received by a network node through a communication link from a separate network node within a wireless network. The network node can also be configured to transmit packet communications from the network node through the communication link to the separate network node. The network node generates composite LQI measurements for the received packet communications, and the composite LQI measurements are based upon signal strength measurements for the received packet communications and also based upon signal quality measurements for the received packet communications. The network node then adjusts the communication link based upon the composite LQI measurements.