Wi-Fi Client Registration via Multicast Packet Embedding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Embedded wireless communication devices with limited user interfaces, such as home appliances and sensors, face difficulties in accessing secure wireless networks due to their inability to easily enter setup and configuration information like SSIDs and passwords, which is time-consuming and inconvenient.
Innovation Solution
An established Wi-Fi network client uses multicast packets to transmit unencrypted or encrypted setup and configuration information, including SSIDs and passwords, to embedded devices, allowing them to access the network without relying on user interface input, by utilizing unencrypted sections of Wi-Fi packets and rebroadcasting through access points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If setup and configuration information is manually entered through user interface, then network security is maintained, but setup time and complexity increase significantly for embedded devices
Solution Approach 1:
The patent introduces an intermediary device (such as a smartphone or computer) that acts as a mediator between the embedded device and the Wi-Fi network. The intermediary device captures the setup information from its own interface, encrypts it, and transmits it to the embedded device via wireless communication, eliminating the need for manual entry on the embedded device while maintaining security through encryption.
Solution Approach 2:
The patent replaces the mechanical/manual entry process with an automated electronic system. Instead of physically typing information into the embedded device's limited interface, the system uses wireless communication protocols to automatically transfer encrypted setup information from an intermediary device to the embedded device, significantly reducing setup time and complexity.
2Ease of operation
If setup information is broadcast unencrypted, then setup process is simplified, but network security is compromised
Solution Approach 1:
The patent changes the state of the setup information from plain text to encrypted form during transmission. By applying encryption algorithms to the setup information before wireless transmission, the system maintains ease of automated setup while ensuring that intercepted data remains insecure and unusable without the decryption key.
Solution Approach 2:
The patent extracts the sensitive setup information from the broadcast channel and delivers it through a secure, targeted wireless transmission to the specific embedded device. This separates the public network discovery process from the private credential distribution, allowing simplified automated setup while maintaining security through selective encrypted delivery.
3Reliability
If encrypted transmission is used, then network security is maintained, but compatibility with legacy devices is reduced
Solution Approach 1:
The patent performs preliminary encryption of the setup information before transmission to the embedded device. By pre-encrypting the data using standard encryption algorithms, the system ensures that legacy devices receiving the transmission can process and store the encrypted information without needing to understand the encryption mechanism themselves, maintaining both security and compatibility.
Data Source
AI summary
Techniques are provided to enable the registration of an embedded device with a wireless network, such as a Wi-Fi network. An established client of the wireless network formulates one or more data packets having an unencrypted multicast address, where at least a portion of the multicast address is unnecessary for transmission of the data packets over the wireless network. The established client inserts network configuration information in the unused portion of the multicast address and transmits the data packets over wireless network. The network configuration information can include a network identification (SSID) and network password. Any access point that receives the multicast packets will retransmit multiple times per standard protocol, allowing the embedded device to receive the original transmission from the client device or the retransmissions. Since the address portion of data packets are not encrypted, the embedded device can determine the SSID and any password from the multicast packets, and thereafter register with the wireless network.