LTE WLAN Interference Reduction via Dynamic Signal Adjustment
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Solution Overview
Problem
Current methods fail to provide a simple and universal solution for reducing mutual interference among equipment-sharing networks with adjacent bands, such as LTE and WLAN, due to challenges in hardware design and software implementation, leading to performance issues and power dissipation.
Innovation Solution
A method and device that monitor the quality of a first signal and adjust the working state of a second signal when it falls below a preset threshold, specifically adjusting the WLAN working channel or transmitting power to minimize interference between LTE and WLAN networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a filter with high suppression is used to increase isolation between adjacent bands, then mutual interference is reduced, but path loss increases and transmitting and receiving performance deteriorates
Solution Approach 1:
The patent changes the working parameters of the second access technology (WLAN) dynamically based on the detection of first access technology (LTE) signals. When LTE signal is detected, the system adjusts WLAN parameters such as disabling transmission or switching channels, thereby reducing mutual interference without requiring hardware filters that would cause path loss.
2Object-affected harmful factors
If an antenna system with high isolation and ultra-wideband feature is designed, then mutual interference is reduced, but device complexity increases
Solution Approach 1:
The patent replaces the mechanical/hardware solution (complex antenna system with high isolation) with a software/control solution. The system uses signal detection and parameter adjustment mechanisms to achieve interference reduction, substituting physical isolation requirements with intelligent control of access technology working states.
3Object-affected harmful factors
If base station monitors CQI and adjusts sub-band allocation, then interference avoidance is achieved, but implementation difficulty increases and universality decreases
Solution Approach 1:
Instead of having the base station monitor CQI and make complex decisions about sub-band allocation, the patent inverts the approach by having the terminal equipment perform simple signal quality detection and report to the base station, which then makes straightforward parameter adjustments. This simplifies the overall implementation compared to complex base station-side CQI monitoring and sub-band management.
Data Source
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AI summary
Disclosed are a method and device for reducing mutual interference among equipment-sharing networks with adjacent bands. Quality of a first signal is monitored; and when the quality of the first signal is lower than a preset quality threshold, a working state of a second signal is adjusted to reduce mutual interference in a shared equipment, where the first signal and the second signal are in adjacent bands and interfere with each other. With this simple and easy method, impact of mutual interference can be reduced effectively, providing a simple universal method for handling existing mutual interference among equipment-sharing networks with adjacent bands.