Wi-Fi P2P Terminal Device Channel Search Controller
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Solution Overview
Problem
Wi-Fi terminal devices operating in station mode experience performance degradation when waiting for a Wi-Fi P2P connection, as they need to interrupt and re-establish connections to access points while searching for external devices for direct communication.
Innovation Solution
A controller manages the Wi-Fi module to interrupt the connection to an access point, sequentially search through multiple channels, and resume the connection only when an external device for P2P communication is found, minimizing performance loss by reducing unnecessary listen operations during the device discovery process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the Wi-Fi terminal device interrupts connection to AP and performs listen operation to establish Wi-Fi P2P connection, then direct communication capability is improved, but station mode performance is degraded
Solution Approach 1:
The patent implements dynamic switching between Wi-Fi station mode and Wi-Fi P2P mode based on operational needs. The terminal device can flexibly transition between connected state (for station mode) and disconnected state (for P2P listen operation), optimizing performance for the active communication mode while minimizing impact on the other mode.
Solution Approach 2:
The patent employs periodic listen operations at specific intervals rather than continuous listening. The terminal device performs listen operations on Wi-Fi channels at predetermined time intervals while maintaining station mode connection, reducing the frequency and duration of disconnections while still enabling P2P device discovery and connection establishment.
2Adaptability or versatility
If the terminal device performs listen operation on multiple channels to find external devices, then P2P connection establishment is improved, but connection stability is degraded
Solution Approach 1:
The patent performs preliminary channel scanning and device discovery operations before fully interrupting the AP connection. The terminal device identifies potential P2P devices and prepares connection parameters in advance, allowing for smoother transitions and reduced connection instability when switching between modes.
Solution Approach 2:
The patent introduces a state machine controller as an intermediary layer that manages the complex transitions between Wi-Fi station mode and P2P modes. This controller coordinates channel switching, listen operation timing, and connection state changes, ensuring stable transitions and maintaining overall connection reliability despite frequent mode changes.
Data Source
AI summary
A display apparatus which is controlled by a remote control apparatus is provided. The display apparatus includes a wireless fidelity (Wi-Fi) module which is connected to an access point (AP) and operates in a Wi-Fi station mode and a controller which controls the Wi-Fi module to interrupt the connection to the AP when a Wi-Fi peer-to-peer (P2P) function is executed and iterates an operation of resuming the connection to the AP after a search operation is performed through each channel while a plurality of channels are sequentially selected. when an external device which performs P2P communication is found in the search operation, the controller controls the Wi-Fi module to perform a listen operation of receiving a signal transmitted from the external device and transmitting a response.