Ad-hoc Network Coalescing via Beacon Modification
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Solution Overview
Problem
Existing ad-hoc WiFi network creation methods require burdensome user intervention and are not user-friendly, especially when devices need to form networks without an access point, as they often require users to understand and choose between registrar and enrollee modes, leading to inefficient data exchange and interaction.
Innovation Solution
Devices configured as registrars periodically enter scanning modes to intercept beacons, modify their beacons with attributes like MAC addresses, and prompt users to join or add devices to networks, allowing seamless network formation without powering off, using a method that includes user-friendly notifications via LCD or audio prompts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If devices use traditional ad-hoc network creation methods, then networks can be formed without access points, but user intervention and complexity increase
Solution Approach 1:
The patent implements self-service by enabling devices to automatically discover and join ad-hoc networks without user intervention. The system autonomously performs beacon monitoring, device discovery, and network joining operations, eliminating the need for users to manually configure network parameters or understand registrar/enrollee modes.
Solution Approach 2:
The patent applies preliminary action by pre-configuring devices with necessary network parameters and authentication credentials before ad-hoc network formation. Devices are prepared in advance with stored beacon information and joining parameters, allowing seamless automatic connection when devices come into range without requiring real-time user input.
2Productivity
If devices continuously scan for beacons, then network discovery improves, but battery consumption increases
Solution Approach 1:
The patent implements periodic action by having devices scan for beacons at regular intervals rather than continuously. The system monitors beacons during specific time windows and enters low-power states between scans, maintaining network discovery capability while significantly reducing average power consumption compared to continuous monitoring.
Solution Approach 2:
The patent maintains continuity of useful action by ensuring that periodic scans are scheduled to detect beacon transmissions from target devices. The system optimizes scan timing to coincide with expected beacon periods, ensuring network discovery remains effective while minimizing idle scanning time that would waste battery power.
3Ease of operation
If devices automatically join networks, then user-friendliness improves, but network security may be compromised
Solution Approach 1:
The patent implements feedback by having devices verify beacon authenticity and network parameters before automatic joining. The system continuously monitors for expected beacon patterns, validates network credentials, and only proceeds with joining when verification succeeds, providing a feedback loop that maintains security while enabling automatic operation.
Solution Approach 2:
The patent applies preliminary action by pre-configuring security credentials and authentication parameters before network joining attempts. Devices are prepared in advance with trusted device identifiers and encryption keys, allowing automatic security verification to occur seamlessly during the joining process without compromising either convenience or security.
Data Source
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AI summary
A device previously configured as a registrar and that has established an independent ad-hoc network is automatically discovered by another device also previously configured as a registrar. To form an ad-hoc wireless network between these two devices, each device periodically enters a scanning mode to scan for and intercept beacons transmitted by the other device. Upon such interception, one of the devices becomes an enrollee in accordance with a predefined condition and in response to a user selected option. Subsequently, the enrollee modifies its beacons to include an attribute, such as the MAC address, associated with the other device. After intercepting the modified beacon, the remaining registrar prompts it user to decide whether to allow the enrollee to join the registrar's network. If the user responds affirmatively, a handshake is performed between the two devices and a subsequent attempt is made by the enrollee to join the registrar's network.