WiFi P2P Discovery via Stationary Frequency Band Broadcasting
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Solution Overview
Problem
Frequent handover of WiFi devices among channels 1, 6, and 11 at the 2.4GHz frequency band during wireless connection establishment disrupts normal use of other WiFi services, leading to reduced transmission rates or inability to use them properly.
Innovation Solution
A method where a smart device acquires its current wireless working frequency band and periodically broadcasts a P2P data packet, including device information, allowing a smart terminal to establish a wireless connection without frequent channel switching, thus maintaining compatibility with other WiFi services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If WiFi devices frequently handover among channels 1, 6, and 11 at the 2.4GHz frequency band during wireless connection establishment, then device discovery capability is improved, but normal use of other WiFi services is disrupted with reduced transmission rates
Solution Approach 1:
The patent segments the channel scanning process by having different devices perform scanning at different frequencies. The smart terminal scans at multiple frequencies (including 1, 6, and 11) while the smart device remains stationary at its current frequency band, dividing the discovery task to avoid mutual interference and maintain normal WiFi service operation.
Solution Approach 2:
Instead of both devices actively scanning and handovering among channels (traditional approach), the patent inverts the roles: the smart terminal performs active scanning across multiple channels while the smart device passively waits at its current frequency band, reversing who initiates the frequency hopping and who remains stationary.
2Adaptability or versatility
If WiFi devices perform frequent channel switching among channels 1, 6, and 11, then complete coverage of frequency bands is improved, but other WiFi services become incapable of normal use
Solution Approach 1:
The frequency band coverage task is segmented between two devices: the smart terminal comprehensively scans all frequency bands (channels 1, 6, and 11) while the smart device maintains its connection at a specific frequency band. This segmentation allows complete frequency coverage for discovery while ensuring continuous reliable operation of WiFi services on the stationary device.
Solution Approach 2:
The smart terminal acts as an intermediary that performs the frequency hopping and scanning tasks, allowing the smart device to remain stationary and maintain stable WiFi service operation. The intermediary device absorbs the interference caused by frequency switching, protecting the normal operation of WiFi services on the other device.
3Loss of information
If devices broadcast probe request data packets on multiple channels, then device discovery completeness is improved, but transmission efficiency of other WiFi services is reduced
Solution Approach 1:
The patent inverts the traditional symmetric discovery approach where both devices broadcast on multiple channels. Instead, only the smart terminal broadcasts probe request data packets across multiple channels while the smart device remains stationary, reversing who performs the multi-channel broadcasting and who maintains stable transmission, thereby improving overall transmission efficiency while preserving discovery completeness.
Data Source
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AI summary
Provided are a method and device for establishing a wireless connection. The method includes that: a current wireless working frequency band of a smart device is acquired (101); and a P2P data packet is periodically broadcast through the current wireless working frequency band, the P2P data packet at least including device information of the smart device, and a smart terminal establishes a wireless connection with the smart device according to the received device information (102). Since the P2P data packet broadcast by the smart device at the current wireless working frequency band is at the same frequency band with other Wireless Fidelity (WiFi) services on the smart device, handover may be not frequently performed among channels 1, 6 and 11 for broadcasting, and influence on normal use of the other WiFi services is avoided.