Wireless Frequency Switching for Hidden Interference Detection
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Solution Overview
Problem
Electronic devices experience hidden interference when an access point fails to detect signals from other devices in overlapping frequency bands, leading to communication collisions and reduced performance.
Innovation Solution
The electronic device identifies hidden interference by analyzing pre-high efficiency modulated fields of packets across multiple sub-frequency bands and communicates this information to external devices to adjust communication frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an access point uses carrier sense multiple access with collision avoidance to distribute frequency resources, then wireless communication can be performed without interference that the access point detects, but hidden interference from other electronic devices cannot be recognized leading to communication collisions
Solution Approach 1:
The access point receives feedback information from the first electronic device about hidden interference detected in specific frequency bands. This feedback mechanism allows the access point to be aware of interference conditions that it cannot directly detect, enabling it to adjust frequency resource allocation and avoid collisions caused by hidden interference.
Solution Approach 2:
The first electronic device acts as an intermediary that detects hidden interference on behalf of the access point. Since the electronic device is within range of both the access point and the interfering device, it can detect signals from the interfering device that the access point cannot detect, and relay this information back to the access point for frequency adjustment.
2Productivity
If the access point distributes frequency resources based on detected signals only, then frequency allocation is simple and efficient, but frequency bands with hidden interference are not avoided leading to communication collisions
Solution Approach 1:
The access point proactively adjusts frequency resource allocation by receiving advance information about hidden interference from electronic devices. This preliminary action allows the system to prevent communication collisions before they occur, rather than reacting to collisions after they happen, maintaining both efficiency and reliability.
Data Source
AI summary
An electronic device is provided. The electronic device includes a communication module, a processor operatively connected to the communication module, and a memory operatively connected to the processor, the memory include instructions that, when executed, cause the processor to receive a first signal by using a plurality of sub-frequency bands through the communication module, identify at least one sub-frequency band in which hidden interference is identified on the basis of a pre-high efficiency modulated field (pre-HE modulated field) of a packet indicated by the first signal, and change a communication frequency by transmitting a second signal including information indicating the at least one identified sub-frequency band to an external electronic device in which a wireless communication connection has been established.