Wireless Access Authentication for Zero-Power IoT Devices
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Solution Overview
Problem
Zero-power devices, particularly those with limited energy supply like ambient-power devices, face challenges in completing traditional access processes due to low complexity and power consumption, leading to excessively long access delays in communication systems like WiFi, which is problematic for IoT applications with stringent delay requirements.
Innovation Solution
A wireless communication method where a first device sends a message encrypted with a first key to a second device during the access process, simplifying the access and key exchange, thereby reducing delay and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional access process (scanning, authentication, association, 4-way handshake) is used in WiFi system, then communication security and reliability are ensured, but access delay becomes excessively long and energy consumption increases
Solution Approach 1:
The patent extracts and removes the complex 4-way handshake process from the traditional WiFi access sequence. By using target indication information that directly carries encrypted data, the patent eliminates the need for separate authentication and key exchange steps, thereby reducing access delay while maintaining security through the encryption mechanism already present in the target indication information.
Solution Approach 2:
The patent applies preliminary action by pre-establishing encryption keys and security mechanisms before the actual data transmission. The encryption key is prepared and stored in advance, allowing the zero-power device to directly transmit encrypted data without undergoing time-consuming authentication procedures during the access process.
2Reliability
If traditional access process is completed by zero-power devices, then communication reliability is maintained, but energy consumption becomes excessively high
Solution Approach 1:
The patent extracts the energy-intensive authentication and key exchange procedures from the access process. By using a simplified mechanism where the zero-power device only needs to transmit target indication information with encrypted data, the patent eliminates the need for power-consuming cryptographic operations during the access phase, thereby reducing energy consumption while maintaining communication reliability through pre-established security keys.
Solution Approach 2:
The patent applies self-service by enabling the zero-power device to utilize already-established encryption keys and security mechanisms without requiring active participation in complex authentication procedures. The device can directly transmit encrypted data using pre-configured security parameters, thereby reducing its energy consumption while maintaining secure communication.
3Productivity
If simplified access process is used to reduce delay and energy consumption, then access speed improves, but device authentication and information security may be compromised
Solution Approach 1:
The patent introduces target indication information as an intermediary carrier that embeds both the destination address and encrypted data. This intermediary structure allows the access process to be simplified for speed while maintaining security, as the encryption key management and authentication are handled through the pre-established key infrastructure rather than complex real-time authentication protocols.
Solution Approach 2:
The patent applies preliminary action by pre-establishing encryption keys and security mechanisms before data transmission. This allows the simplified access process to maintain security through pre-configured encryption rather than complex real-time authentication, thereby achieving both high access speed and reliable device authentication.
Data Source
AI summary
A wireless communication method, a first device, and a second device. When accessing a second device, a first device sends a first message to the second device. The first message includes target information encrypted with a first key.