WPAN Master Station Transition and Beacon Management
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Solution Overview
Problem
Existing wireless personal area network (WPAN) systems lack efficient mechanisms for maintaining connectivity and transitioning to a new master device when the current WPAN master device becomes unavailable, leading to disruptions in communication sessions.
Innovation Solution
A method where a station equipped with WPAN master capabilities detects the unavailability of the current WPAN master device and automatically becomes the new master, sending beacons with connectivity parameters, including a service set identifier and session ID, to reestablish and maintain the WPAN session by annexing associated stations and ensuring seamless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a WPAN master device becomes unavailable without proper notification, then connectivity disruption occurs, but implementing a proper disconnect mechanism increases device complexity
Solution Approach 1:
The patent implements preliminary action by requiring the master device to send a disconnect indication message to all slave devices before becoming unavailable. This advance notification allows slave devices to proactively clear their connection records and prevent reconnection attempts, ensuring clean disconnect without requiring complex post-disconnect handling mechanisms.
Solution Approach 2:
The patent applies self-service by enabling slave devices to automatically detect the master's unavailability through the absence of beacon frames and autonomously clear their connection records upon receiving a disconnect indication. This eliminates the need for complex centralized management of connection states, as each device independently manages its own connection record.
2Productivity
If slave devices continue to attempt connection to an unavailable master, then communication sessions are disrupted, but implementing automatic detection and transition mechanisms increases system complexity
Solution Approach 1:
The patent implements feedback by having slave devices monitor for beacon frames from the master device. When beacons stop arriving, slave devices automatically detect the master's unavailability and clear their connection records. This simple feedback loop enables automatic adaptation to master unavailability without requiring complex transition protocols or multiple candidate master selections.
3Loss of information
If connection records are not cleared when master becomes unavailable, then false reconnection attempts occur, but implementing automatic clearing increases automation complexity
Solution Approach 1:
The patent applies self-service by enabling slave devices to automatically clear their connection records when they detect master unavailability through missing beacons or receive a disconnect indication. This automatic self-management of connection records eliminates the need for manual intervention or complex centralized record-keeping systems, maintaining accurate connection state information through simple autonomous device behavior.
Data Source
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AI summary
A wireless communication device and a method of re-establishing a connection with a WPAN master device is presented. The method includes detecting that a first master station of a WPAN session which includes the first master device and one or more stations becomes unavailable, activating a master station application to become a second master station and sending one beacon to notify the stations of the session about the second master station connectivity parameters.