TDLS Link Status Synchronization via Teardown Signals
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Solution Overview
Problem
Inconsistent link information conditions in tunneled direct link setup (TDLS) systems lead to communication failures and resource inefficiencies due to discrepancies in link status indicators between stations in a wireless local area network (WLAN).
Innovation Solution
Implementing a method where stations maintain link status indicators and transmit teardown signals to synchronize link information, ensuring that both stations have consistent status, preventing packet loss and improving communication efficiency by minimizing inconsistent link information conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stations transmit and maintain link status indicators independently, then each station can track its own link state, but inconsistent link information conditions occur between stations leading to communication failures
Solution Approach 1:
The patent implements a feedback mechanism where stations exchange link status indicator frames to inform each other of their current link state. When a station detects link loss, it transmits a link status indicator frame to the other station, triggering an update of the link status. This feedback loop ensures both stations maintain consistent link information and prevents communication failures due to inconsistent states.
Solution Approach 2:
The link status indicator frame serves as an intermediary message that carries link state information between stations. This standardized frame structure acts as a mediator to synchronize link status information, ensuring both stations have consistent views of the link state without requiring complex direct coordination protocols.
2Reliability
If stations drop packets when link status is inconsistent, then packet loss is prevented, but communication efficiency decreases due to unnecessary teardown signals
Solution Approach 1:
The patent performs preliminary actions by maintaining link status indicators and proactively detecting inconsistencies before packet transmission issues occur. When a station detects link loss, it preemptively transmits a link status indicator frame and prepares to drop subsequent packets, preventing potential communication errors while allowing normal operation during consistent states.
Solution Approach 2:
The system dynamically adjusts packet handling based on real-time link status consistency. When link status indicators match between stations, normal packet transmission proceeds efficiently. When inconsistencies are detected, the system dynamically switches to dropping packets and initiating teardown procedures, optimizing the balance between reliability and efficiency based on current conditions.
Data Source
AI summary
A method includes directly receiving, at a first station, a signal transmitted from a second station. Each of the first and second stations respectively includes a link status indicator that indicates whether a direct link exists between the first and second stations. The signal was transmitted based on the link status indicator of the second station indicating that a direct link does exist between the first and second stations. Responsive to the link status indicator of the first station indicating that a direct link does not exist between the first station and the second station, the signal is dropped, and a teardown signal is transmitted from the first station to the second station. Responsive to the teardown signal, the link status indicator of the second station is to be changed, by the second station, to indicate that a direct link does not exist between the first and second stations.