Beacon-Assisted Multi-AP Association for Faster Wireless LAN Roaming
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Solution Overview
Problem
Existing wireless LAN systems face challenges in efficiently establishing associations with multiple access points, leading to delays during roaming between APs.
Innovation Solution
A method and device for establishing association with multiple access points (APs) in a wireless LAN system, involving the exchange of beacon frames and association-related information frames between stations and access points to facilitate multi-AP associations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a station performs traditional single-AP association, then the association establishment process is simple, but roaming delay occurs when switching between APs
Solution Approach 1:
The patent applies preliminary action by having the station request and receive association information for multiple APs in advance before actual roaming is needed. The station sends a first frame requesting association information for multiple APs, and receives a second frame containing this pre-fetched information, enabling faster switching without traditional reassociation delays
Solution Approach 2:
The patent merges multiple association requests into a single operation by transmitting one frame that simultaneously requests association information for multiple APs, and receiving a consolidated response frame containing association information for all requested APs, thereby reducing the number of separate communication rounds
2Productivity
If association information for multiple APs is requested in advance, then roaming delay is reduced, but the frame exchange process becomes more complex
Solution Approach 1:
The first frame serves multiple functions: it requests association information for multiple APs simultaneously, identifies the station's capability for multi-AP association, and initiates the efficient association establishment process. The second frame similarly provides consolidated association information for multiple APs in a single response, reducing the number of separate communication rounds
Data Source
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AI summary
The present disclosure discloses a method and a device for establishing association with multiple access points (APs) in a wireless LAN system. A method carried out by a station (STA) in a wireless LAN system, according to one embodiment of the present disclosure, may comprise the steps of: receiving, from a specific AP, a beacon frame including information related to an AP set to which the specific AP belongs; transmitting, to the specific AP, a first frame for requesting association between the STA and multiple APs belonging to the AP set; and receiving, from the specific AP, a second frame corresponding to a response to the first frame. Here, at least one of the first frame or the second frame may include association-related information for each AP included in the multiple APs.