Dynamic Cellular Uplink Power Control for Wi-Fi Interference
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Solution Overview
Problem
Wireless routers connected to cellular networks experience interference with Wi-Fi signals due to overlapping frequency bands, leading to poor user-perceived rates and potential network access failures.
Innovation Solution
A communications system that includes a wireless access device with a cellular module and a Wi-Fi module, which reduces uplink transmit power of the cellular network when specific preset conditions are met, thereby minimizing interference to Wi-Fi signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cellular network uses high uplink transmit power to ensure good signal quality and network access, then the cellular network can maintain reliable communication, but it causes strong interference to Wi-Fi frequency bands
Solution Approach 1:
The patent implements dynamic adjustment of cellular uplink transmit power based on real-time detection of Wi-Fi interference conditions. The system continuously monitors Wi-Fi signal status and automatically adjusts cellular transmit power levels, transitioning between high power (for good signal quality) and low power (for reduced interference), thereby resolving the contradiction between cellular reliability and Wi-Fi protection
Solution Approach 2:
The patent changes the transmit power parameter of the cellular network dynamically based on detected interference conditions. When Wi-Fi interference is detected, the system reduces the cellular uplink transmit power parameter; when Wi-Fi interference is absent, it increases the power parameter. This parameter adjustment resolves the contradiction by adapting the cellular transmission characteristics to the current electromagnetic environment
2Object-affected harmful factors
If the cellular network reduces uplink transmit power to reduce interference to Wi-Fi, then Wi-Fi performance improves, but cellular network signal quality deteriorates
Solution Approach 1:
The system dynamically switches between high and low transmit power modes based on real-time detection of Wi-Fi presence and interference conditions. This dynamic adaptation allows the cellular network to reduce interference when needed while maintaining good signal quality when Wi-Fi is absent, resolving the contradiction between interference reduction and signal quality maintenance
Solution Approach 2:
The patent implements a feedback mechanism where the system continuously monitors Wi-Fi signal status and cellular transmission quality, then uses this feedback information to adjust cellular uplink transmit power. The feedback loop ensures that power reduction only occurs when Wi-Fi interference is actually present, preventing permanent degradation of cellular signal quality
3Object-affected harmful factors
If the wireless router switches Wi-Fi channels to avoid cellular interference, then Wi-Fi performance improves, but the system complexity increases
Solution Approach 1:
The patent extracts the interference control function from the Wi-Fi channel switching mechanism and places it at the cellular network side. Instead of having the Wi-Fi system complexly adapt to avoid cellular interference, the solution simply has the cellular network adjust its transmit power, thereby simplifying the overall system while resolving the interference issue
Data Source
AI summary
Embodiments of this application provide an interference processing method and a device, to reduce interference from a cellular network to Wi-Fi signals by reducing uplink transmit power of the cellular network in the field of communications technologies. According to the interference processing method: If a wireless access device determines that there is a Wi-Fi device whose signal status parameter is less than a first threshold in connected Wi-Fi devices, the uplink transmit power of the cellular network is greater than or equal to a second threshold, and a signal status parameter of the cellular network is greater than or equal to a third threshold, and/or determines that a Wi-Fi rate of a Wi-Fi device with a smallest signal status parameter in the connected Wi-Fi devices is less than a fourth threshold, and an air interface throughput of the cellular network is greater than or equal to a fifth threshold, the wireless access device reduces the uplink transmit power of the cellular network, to reduce interference from a cellular signal to a Wi-Fi signal. The embodiments of this application are used for interference processing.