Wi-Fi Direct User Input Back Channel for AV Control
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Solution Overview
Problem
In Wi-Fi direct communication schemes, users must input commands to the source device to control audio/video data, as the sink device cannot receive and transmit user inputs, leading to inconvenience.
Innovation Solution
The method involves the sink device receiving user inputs for controlling audio/video data and transmitting these inputs back to the source device through a User Input Back Channel (UIBC) in a Wi-Fi direct network, using a specific message structure that includes input category, body, and parameter information, enabling the source device to control AV data based on the received inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sink device is designed to only display AV data without receiving user inputs, then the device structure remains simple, but the ease of operation deteriorates as users must input commands to the source device instead of the sink device
Solution Approach 1:
The patent introduces a user input back channel (UIBC) as an intermediary communication path that allows the sink device to receive user inputs locally and forward them to the source device. This mediator mechanism enables the sink device to accept user commands without requiring users to physically access the source device, thereby improving ease of operation while maintaining relatively simple device architecture through the use of an additional communication channel.
2Ease of operation
If the sink device receives and transmits user inputs to the source device, then the ease of operation improves, but the device complexity increases due to additional communication channels and processing capabilities
Solution Approach 1:
The sink device is designed with multi-functionality, serving both as an AV display device and as an input reception device. By integrating the capability to receive and forward user inputs into the existing sink device architecture, the patent enables one device to perform multiple functions (displaying AV data and receiving user commands) without requiring separate dedicated devices, thus managing complexity while improving ease of operation.
Solution Approach 2:
The patent implements a feedback mechanism through the user input back channel (UIBC) that creates a closed-loop communication path from the sink device back to the source device. This feedback channel allows user inputs received at the sink device to be transmitted back to the source device, enabling the system to respond to user commands initiated at the display device while maintaining structured communication protocols that manage complexity.
3Ease of operation
If a user input back channel is established from sink device to source device, then the ease of operation improves, but the communication system complexity increases
Solution Approach 1:
The communication system is segmented into distinct functional channels: a forward channel for transmitting AV data from source to sink device, and a separate user input back channel (UIBC) for transmitting user commands from sink to source device. This segmentation allows each channel to be optimized independently and managed separately, reducing the complexity of the overall communication system while enabling improved ease of operation through the dedicated input feedback path.
Data Source
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AI summary
Disclosed is a method of performing communication between a sink device and a source device in a Wi-Fi direct network. The method includes receiving a user's input for controlling audio/video (AV) data received from the source device, generating a message for controlling the AV data based on the user's input, and transmitting the message to the source device through a Wi-Fi direct link.