Access Point Identifier Assignment for MAC-Randomized Stations
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Solution Overview
Problem
The increasing adoption of randomized MAC addresses in wireless devices poses challenges for WLAN infrastructure, as it complicates the recognition of stations, leading to a perceived loss of utility and privacy concerns for users.
Innovation Solution
An access point communicates the types of unique identifiers supported by the network and assigns a unique identifier to stations on a per-station basis, using a unique identifier set action frame to manage identifiers even with changing MAC addresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If randomized MAC addresses are used for privacy protection, then user privacy is improved, but station recognition and device tracking capabilities deteriorate
Solution Approach 1:
The patent divides the identification system into two separate components: randomized MAC addresses for communication and unique private identifiers for recognition. This segmentation allows each component to fulfill its specific function without compromising the other, resolving the contradiction between privacy protection and device tracking.
Solution Approach 2:
The patent introduces a unique identifier as an intermediary element that mediates between the randomized MAC address and the network's recognition needs. This intermediary allows the network to track and recognize devices without exposing or relying on the randomized MAC address, thus maintaining both privacy and recognition capabilities.
2Reliability
If unique identifiers are assigned to all stations, then device tracking and parental controls are improved, but user privacy control and autonomy deteriorate
Solution Approach 1:
The patent makes the unique identifier assignment dynamic rather than mandatory. Stations can choose whether to accept and use a unique identifier based on their privacy preferences and the network's requirements. This dynamic approach allows the system to adapt to different user needs, maintaining both device tracking capability and user privacy control.
Solution Approach 2:
The patent creates a universal identification system that can serve multiple functions: network recognition, device tracking, parental controls, and privacy protection. The unique identifier system is designed to be versatile, working across different scenarios and user preferences without requiring separate systems for each function.
3Object-affected harmful factors
If randomized MAC addresses change frequently, then privacy protection is improved, but network association stability and feature consistency deteriorate
Solution Approach 1:
The patent creates a stable copy of the station's identity in the form of a unique identifier that remains consistent across different MAC address changes. While the MAC address changes frequently for privacy, the unique identifier serves as a stable copy that maintains network association and enables consistent feature operation.
Solution Approach 2:
The patent performs preliminary assignment of unique identifiers to stations before they need to be recognized or tracked. This preliminary action establishes a stable reference point that persists through MAC address changes, ensuring network association stability and feature consistency without requiring frequent re-identification.
Data Source
AI summary
An access point can track a station throughout a network using an identifier, for example, a media access control (MAC) address. However, as MAC addresses are randomized or changing, there is a need for the access point to provide a unique identifier to a station that does not rely on a MAC address. The access point can receive a unique identifier query response action frame from the station that indicates that the station is associated with a corresponding unique identifier for the network and based on the unique identifier query response action frame, send a unique identifier set action frame to the station so as to cause the station to set as the unique identifier for the station the unique identifier of the unique identifier set action frame sent by the access point.