Probe Frame Session Discovery for Wireless Display Groups
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Solution Overview
Problem
Existing methods for device discovery in multimedia content transmission/receiving display groups are inefficient, lacking a standardized approach for source and sink devices to associate effectively within wireless communication networks.
Innovation Solution
A method involving the transmission of probe request and response frames to determine session information, allowing devices to associate with a display group by using P2P or TDLS connections, enabling efficient multimedia content delivery between source and sink devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional device discovery methods are used in display groups, then devices can connect to transmit multimedia content, but the device discovery process is inefficient and lacks standardized association procedures
Solution Approach 1:
The patent implements a feedback mechanism where the group owner broadcasts probe response frames containing session information to responding devices. This allows discovering devices to receive feedback about available sessions and make informed association decisions, improving discovery efficiency while maintaining standardized procedures
Solution Approach 2:
The group owner acts as an intermediary in the device discovery process. It receives probe request frames from discovering devices and provides structured probe response frames with session information, mediating between the discovering device and the display group to enable efficient and standardized association
2Loss of information
If session information is included in probe response frames, then devices can make informed association decisions, but the frame size and processing complexity increase
Solution Approach 1:
The patent segments the session information into structured elements within the probe response frame, including group owner identifier, session identifier, and device capability information. This segmentation organizes the information systematically, enabling efficient processing while delivering complete session details to discovering devices
Solution Approach 2:
The patent changes the parameter structure of the probe response frame to include specific session information fields. By standardizing these parameters (group owner ID, session ID, capability flags), the system delivers comprehensive session information while maintaining manageable frame processing through defined parameter formats
Data Source
AI summary
Provided are a device discovery method and a communication device thereof. The method includes: transmitting a probe request frame; receiving a probe response frame including session information on a client connected to a group owner (GO), from the GO among source and sink devices belonging to the display group; and determining whether to associate with the display group by using the session information in the probe response frame.