AID Synchronization During BSS Color Switch in Wi-Fi Networks
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Solution Overview
Problem
Current wireless communication systems lack a mechanism to update the partial Associated ID (AID) synchronously with a Basic Service Set (BSS) color change, leading to potential misidentification of intra-BSS and inter-BSS traffic, necessitating inefficient device disconnection and reconnection.
Innovation Solution
A method and system for synchronizing the AID within a BSS by detecting color collisions, configuring an AID update request frame with the new BSS color, and sending it to all devices, ensuring all STAs update their AIDs without disconnection, using an AID update request frame and response frames to confirm updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a BSS color change is initiated to resolve color collision, then the color collision problem is solved, but the partial AID becomes asynchronous with the updated BSS color causing misidentification of traffic
Solution Approach 1:
The patent applies preliminary action by announcing the new BSS color in advance through beacon frames before the actual color change takes effect. This allows STAs to prepare for the color change and update their AID calculations proactively, maintaining synchronization between BSS color and partial AID without service interruption.
Solution Approach 2:
The patent introduces an intermediary mechanism - the AID update indicator field in beacon frames - that mediates between the BSS color change and the STA's AID update process. This indicator explicitly signals STAs to update their AID based on the new BSS color, ensuring synchronized updates without requiring disconnection and reconnection.
2Loss of information
If disconnection and reconnection is performed to update AID, then AID synchronization is restored, but service interruption occurs and transmission efficiency decreases
Solution Approach 1:
The patent implements continuity of useful action by maintaining the BSS association and communication flow during the color change process. The AID update occurs seamlessly through beacon frame announcements and STA-side updates, allowing data transmission to continue without interruption, thus preserving transmission efficiency while achieving AID synchronization.
3Loss of information
If disconnection and reconnection is performed to update AID, then AID synchronization is restored, but service interruption occurs
Solution Approach 1:
The patent applies preliminary action by announcing the new BSS color in advance through beacon frames before the actual color change takes effect. This allows STAs to prepare for the color change and update their AID calculations proactively, maintaining synchronization between BSS color and partial AID without service interruption.
Solution Approach 2:
The patent implements continuity of useful action by maintaining the BSS association and communication flow during the color change process. The AID update occurs seamlessly through beacon frame announcements and STA-side updates, allowing data transmission to continue without interruption, thus preserving transmission efficiency while achieving AID synchronization.
Data Source
AI summary
A method for updating an associated ID (AID) in a network when a Basic Service Set (BSS) color change occurs is provided. The network includes an Access Point (AP) and a plurality of associated stations (STAs). The method includes: detecting a color collision; setting a new BSS color in response to the color collision; configuring an AID update request frame, wherein an updated AID according to the new BSS color is inserted into a subElement Information Element (IE) field of the AID update request frame; and sending the AID update request frame to the plurality of associated STAs to inform the associated STAs of the updated AID.