Peer Discovery in Wireless TDLS Networks
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Solution Overview
Problem
Current Tunneled Direct Link Setup (TDLS) in IEEE 802.11 wireless networks relies on detecting source and destination addresses for peer discovery, lacking a deterministic method to identify TDLS-capable stations before setting up direct links, which can lead to inefficiencies in network connectivity and resource management.
Innovation Solution
Implementing a peer discovery component within stations that generates and processes discovery requests and responses, including TDLS capability indications, to determine TDLS-capable peers and establish direct links, leveraging existing protocols like P2P discovery and encapsulated frames for transparent transmission through access points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If peer discovery is performed by detecting source and destination addresses in existing TDLS, then the method is simple to implement, but it lacks determinism in identifying TDLS-capable stations
Solution Approach 1:
The patent applies preliminary action by having stations include TDLS capability indications in their discovery requests and responses before actual direct link setup. This allows stations to pre-identify TDLS-capable peers through capability exchange, ensuring deterministic identification before committing to direct link establishment, thereby resolving the contradiction between identification precision and implementation simplicity.
2Productivity
If direct links are set up without deterministic peer identification, then link establishment is rapid, but network efficiency deteriorates due to incompatible peer connections
Solution Approach 1:
The patent performs capability indication exchange during the discovery phase before direct link setup, allowing stations to pre-filter incompatible peers. This preliminary capability verification ensures that only TDLS-capable stations establish direct links, improving network efficiency by preventing incompatible connections while maintaining rapid setup through streamlined capability checking.
Solution Approach 2:
The patent uses capability indication messages as an intermediary mechanism between stations during peer discovery. These intermediary messages carry TDLS capability information that mediates the compatibility assessment, enabling efficient filtering of suitable peers without requiring complex negotiation protocols, thus balancing discovery speed with connection compatibility.
3Adaptability or versatility
If all stations are considered for direct link setup, then connection opportunities are maximized, but resource management burden increases
Solution Approach 1:
The patent extracts and highlights the TDLS capability indication from the general station information, allowing stations to focus evaluation on this specific capability marker. By extracting the relevant capability information into dedicated indication fields in discovery messages, the system can efficiently identify suitable peers without analyzing all station parameters, thereby reducing resource management complexity while maintaining comprehensive connection opportunities.
Data Source
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AI summary
Apparatus and methods of peer discovery in a communications network include generating a discovery request configured to identify a Tunneled Direct Link Setup (TDLS) capable peer device, transmitting the discovery request, and determining if a discovery response is received in response to the discovery request. In an aspect, the apparatus and methods may encapsulate the discovery request in a data frame such that the discovery request is transparent to an access point. In other aspects, the apparatus and methods may form the discovery request by appending TDLS capability information to a probe request. Additionally, the apparatus and methods may include determining if a discovery response is received in response to the discovery request. Thus, the apparatus and methods provide a deterministic method of peer discovery, so that a list of potential peers that are TDLS capable can be available before attempting a TDLS direct link setup.