Dual-Mode Wireless Sensor Provisioning via Channel Scanning
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Solution Overview
Problem
Conventional provisioning methods for Wi-Fi devices in home networks are cumbersome, especially for 'headless' devices lacking user interfaces, and pose challenges in maintaining connectivity during provisioning, particularly when mixed provisioning systems are used, and in supporting dual AP and station roles.
Innovation Solution
A communication device with a signal strength measurement module and controller that operates in both AP and station modes, allowing it to determine the strongest signal channel and provision other devices while maintaining connectivity by scanning channel subgroups within a transmission time waiting interval, ensuring continuous communication and feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a device operates in microAP mode to host its own Wi-Fi network for provisioning, then the device can facilitate connection to the home network, but the device must support dual AP and station roles which complicates maintaining support for connected devices while gathering updated information about available APs
Solution Approach 1:
The patent segments the provisioning process into distinct phases: initial connection phase where the device operates as a station connecting to the home network AP, and provisioning phase where it operates as a microAP to host its own network. This temporal segmentation allows the device to simplify its operational state during each phase while achieving the complex dual-role capability across the entire process.
Solution Approach 2:
The device dynamically transitions between station mode and microAP mode based on the provisioning state. During initial connection, it operates as a station; during provisioning, it switches to microAP mode. This dynamic role change enables the device to adapt to different operational requirements without simultaneously managing both roles in a static manner, thereby reducing complexity.
2Ease of operation
If conventional provisioning methods are used for headless devices, then devices can be provisioned, but the process is cumbersome and requires user input capabilities that headless devices lack
Solution Approach 1:
The patent implements self-service provisioning where the headless device automatically performs provisioning tasks without user intervention. The device autonomously discovers available APs, selects appropriate networks, and completes the provisioning process automatically. This eliminates the need for user input capabilities on headless devices while simplifying the provisioning process from the user perspective.
Solution Approach 2:
The patent introduces an intermediary provisioning server that facilitates the provisioning process between the headless device and the home network. The server handles complex provisioning tasks, communicates with the device, and coordinates the connection process. This intermediary abstraction layer simplifies the provisioning interface for headless devices while managing the complexity of the provisioning logic centrally.
3Ease of operation
If WPS push button provisioning is used, then devices can be connected to the home network, but the buttons must be pressed within a time window which is inconvenient when AP and device are not in close proximity
Solution Approach 1:
The patent replaces the mechanical push button system with a wireless communication-based provisioning mechanism. Instead of requiring physical button presses within a time window, the system uses automated wireless discovery and connection protocols that eliminate temporal constraints. This substitution removes the proximity requirement and time window limitation inherent in the mechanical button system.
Solution Approach 2:
The patent performs preliminary actions by pre-configuring provisioning parameters and pre-establishing communication channels between the device and home network. The device proactively discovers and connects to available APs before the user needs to perform any actions. This preliminary automation eliminates the need for synchronized button presses within time windows.
4Adaptability or versatility
If mixed device networks with various provisioning systems are used, then diverse devices can be supported, but ensuring provisioning of new devices without impacting already provisioned devices presents design challenges
Solution Approach 1:
The patent segments the network into distinct provisioning zones or channels, allowing different provisioning systems to operate independently. Existing provisioned devices remain on stable network channels while new devices undergo provisioning on separate channels or time slots. This segmentation isolates provisioning activities from stable network operations, preventing interference between the two states.
Solution Approach 2:
The patent implements dynamic network configuration where the network topology and channel assignments can change during provisioning without affecting stable connections. The system dynamically adjusts network parameters for new devices while maintaining static connections for existing devices. This dynamic adaptation allows mixed provisioning systems to coexist without compromising network stability.
Data Source
AI summary
Methods, systems, and apparatus are described for provisioning wireless communication devices. One embodiment includes a communication device that determines an operating channel corresponding to an AP having the highest received signal strength measurement. The communication device operates in an AP mode with another communication device on this same channel to facilitate provisioning of the other communication device with the AP. Another embodiment includes a communication device that operates as a station in a first wireless network and as an AP in a second wireless network with another communication device. The communication device determines a transmission time waiting interval corresponding to communication device AP mode transmissions and divides the channels into groups that can be scanned within the transmission time waiting interval. The communication device scans these channel subgroups to identify other APs available for provisioning the other communication device.