Access Point Guest Frame Decryption Segmentation
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Solution Overview
Problem
Existing wireless network Access Points (APs) face challenges in efficiently managing and securing guest frames, as conventional thin APs lack local processing capabilities, leading to delays and security vulnerabilities due to remote decryption and authentication by controllers.
Innovation Solution
An Access Point that determines whether received encrypted data frames are guest or owner frames, with guest frames being sent to servers for decryption while owner frames are processed locally, allowing for local ACK generation and time-sensitive functions, thereby acting as a thin AP for guests and a thick AP for owners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a thin AP architecture is used for guest frames, then device complexity is reduced, but processing speed and security are worsened due to remote decryption requirements
Solution Approach 1:
The patent segments the AP functionality into two distinct modes: thin AP mode for guest frames (where decryption is performed remotely by a controller) and thick AP mode for owner frames (where decryption is performed locally). This segmentation allows each mode to be optimized independently, resolving the contradiction between reduced device complexity and maintained processing speed.
2Reliability
If remote decryption by controller is used for guest frames, then AP security is improved, but latency increases due to additional communication overhead
Solution Approach 1:
The patent implements dynamic behavior where the AP adapts its processing mode based on frame type. For guest frames, it operates in thin AP mode with remote decryption; for owner frames, it switches to thick AP mode with local decryption. This dynamic adaptation allows the system to maintain security while minimizing latency for time-sensitive operations.
3Speed
If local decryption is performed for all frames, then processing speed is improved, but security vulnerabilities increase and device complexity rises
Solution Approach 1:
The patent applies local quality by making different parts of the system (guest frame handling vs. owner frame handling) have different properties. Guest frames use remote decryption through a controller, providing enhanced security, while owner frames use local decryption, providing faster processing. This resolves the contradiction by allowing each frame type to be processed with the most appropriate security and speed characteristics.
Data Source
AI summary
An Access Point receives an encrypted data frame from a client device, and determines whether the encrypted data frame is a guest frame. If it determined that the frame is a guest frame, the Access Point transmits the encrypted data frame to a server for decryption by the server, and determines whether to transmit an ACK to the client device based on the encrypted data frame. Otherwise, the Access Point decrypts the encrypted data frame, and determines whether to transmit an ACK to the client device.