TDLS Wireless Display Discovery via Capability Indicators
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Solution Overview
Problem
Current wireless display systems face challenges in efficiently discovering and establishing connections with devices capable of supporting tunneled direct link setup (TDLS) for wireless display operations, particularly in determining device capabilities and preferences for TDLS links.
Innovation Solution
A method and apparatus for discovering devices capable of TDLS operation, selecting a suitable device based on capabilities, and establishing a TDLS link, which involves transmitting and receiving messages containing TDLS capability, feasibility, and preference information to determine the optimal connection standard between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices transmit detailed capability information messages to determine TDLS support, then connection reliability improves, but communication overhead and discovery time increase
Solution Approach 1:
The patent applies preliminary action by having devices include TDLS capability indicators in initial discovery messages (such as probe request/response or beacon frames) before actual connection establishment. This allows receiving devices to pre-identify TDLS-capable devices and filter candidates early in the discovery process, avoiding the need for extended capability negotiation later. The capability information is prepared and transmitted in advance during normal wireless operations, so when connection establishment is needed, TDLS support is already known.
2Stability of the object's composition
If devices exchange comprehensive capability messages to identify TDLS support, then connection stability improves, but message complexity and processing overhead increase
Solution Approach 1:
The patent extracts the TDLS capability indication from comprehensive capability negotiation messages and separates it into dedicated, minimal-field indicators included in standard discovery frames. Instead of exchanging large capability information elements that contain all possible device features, the invention pulls out only the essential TDLS support flag or indicator, which can be represented by a single bit or small field in existing beacon or probe response frames. This extraction reduces message size and processing requirements while maintaining reliable TDLS capability detection.
3Adaptability or versatility
If devices use standard wireless discovery protocols without TDLS-specific indicators, then protocol compatibility improves, but ability to establish TDLS links deteriorates
Solution Approach 1:
The patent merges TDLS capability indication functionality with existing standard wireless discovery protocols by incorporating TDLS indicators into familiar frame structures such as beacon frames, probe request/response frames, or association request/response frames. Rather than creating a separate proprietary discovery protocol, the invention combines the new TDLS capability signaling with established IEEE 802.11 discovery mechanisms. This allows TDLS-capable devices to be identified using standard protocol exchanges that all wireless devices understand, while the embedded TDLS indicators provide the additional specificity needed for reliable TDLS link establishment.
Data Source
AI summary
Certain aspects of the present disclosure propose computer-program products for discovery of source or sink devices and their capabilities, prior to establishing a link such as a tunneled direct link setup (TDLS) link. The established link may be used for different applications such as Wi-Fi Display session with the desired source or sink device. The proposed computer-program product may also be applied to devices that utilize peer to peer communication.