Wireless LAN Scanning Redirection via Access Point Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless LAN technologies face challenges in reducing the initial setup and association time due to lengthy procedures for station (STA) access to an access point (AP), particularly in scenarios where multiple bands and channels are involved, leading to inefficiencies in scanning and connection processes.
Innovation Solution
A method and apparatus where an access point determines whether to accommodate a station during initial link setup and transmits scanning redirection information, including band and channel details, to redirect the station to a different channel, band, or neighbor access point, thereby optimizing the scanning process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a station conducts initial link setup through traditional scanning procedures, then connection establishment is achieved, but the setup time is significantly lengthened
Solution Approach 1:
The access point performs preliminary actions by determining in advance whether to accommodate the station and preparing scanning redirection information before the station completes its scanning procedure. This allows the station to be redirected to a different channel, band, or neighbor AP that can accommodate it, thereby reducing the overall initial setup time while ensuring reliable connection establishment.
2Reliability
If the access point accommodates all stations during initial link setup, then connection availability is maximized, but system resources and capacity are insufficient
Solution Approach 1:
The access point implements a feedback mechanism where it determines whether to accommodate the station based on current system conditions, and provides scanning redirection information to guide the station to alternative channels, bands, or neighbor APs that can accommodate it. This feedback loop ensures connection availability is maximized while respecting system capacity constraints.
3Adaptability or versatility
If the station scans all channels and bands exhaustively, then complete network discovery is achieved, but scanning time is excessively lengthened
Solution Approach 1:
The invention extracts the scanning redirection function from the traditional exhaustive scanning process. Instead of the station independently scanning all channels and bands, the access point determines accommodation suitability and extracts the redirection decision, providing the station with scanning redirection information that points to specific channels, bands, or neighbor APs. This significantly reduces scanning time while maintaining comprehensive network discovery capability.
4Productivity
If the access point provides detailed scanning redirection information, then scanning efficiency is improved, but frame complexity increases
Solution Approach 1:
The scanning redirection information is embedded with local quality characteristics specific to each redirection target. The frame includes band field information indicating the target band and channel field information indicating the target channel, allowing the station to efficiently redirect only to the most suitable channels or bands without requiring complex frame structures. This localized information approach improves scanning efficiency while keeping the frame structure manageable.
Data Source
AI summary
A scanning method and apparatus in wireless LAN is disclosed. The method comprises determining, by an access point (AP), whether to accommodate a station (STA) conducting an initial link setup and transmitting, by the AP, a frame to the STA, the frame including scanning redirection information for the STA to switch other channel, other band, or a neighbor AP when the AP determines not to accommodate the STA. The scanning redirection information includes a band field and a channel field. The band field indicating a band in which the STA conducts the initial link setup when the STA conducts the initial link setup from current band to the other band. The channel field indicating a channel in which the STA conducts the initial link setup when the STA conducts the initial link setup from current channel to the other channel.