Secondary WLAN Channel Access via Announced Non-Primary Back-Off
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless LAN systems lack efficient methods for accessing secondary channels beyond the primary channel, which hinders optimal utilization of available bandwidth and communication efficiency.
Innovation Solution
A method and device for secondary channel access in a wireless LAN system, where stations exchange frames to perform back-off procedures on non-primary channels, allowing communication to occur even when the primary channel is busy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If stations only access the primary channel using traditional CSMA/CA mechanisms, then channel access is simple and reliable, but bandwidth utilization is inefficient and communication efficiency is limited
Solution Approach 1:
The patent segments the channel access mechanism into two independent parts: primary channel access using traditional CSMA/CA and secondary channel access using the announced back-off procedure. This allows stations to independently manage access to different channel types, improving overall communication efficiency while maintaining the simplicity of primary channel access.
Solution Approach 2:
The patent introduces a new dimension to channel access by adding secondary channels alongside the traditional primary channel. Stations can perform back-off procedures specifically on secondary channels based on announced information, creating an additional access pathway that increases bandwidth utilization without complicating primary channel access.
2Productivity
If stations perform back-off procedures on secondary channels based on announced information, then bandwidth utilization improves, but the complexity of channel access management increases
Solution Approach 1:
The patent applies preliminary action by having stations announce back-off procedure information for secondary channels in advance through control frames. This pre-announced information allows stations to perform back-off procedures on secondary channels without real-time negotiation, simplifying the access management process while improving bandwidth utilization.
Solution Approach 2:
The patent uses control frames as an intermediary to convey back-off procedure information between stations. This intermediary mechanism simplifies the complexity of direct station-to-station negotiation by providing a standardized information exchange format that automatically manages secondary channel access parameters.
3Productivity
If the primary channel is always used for communication, then channel access control is simple, but available bandwidth is not fully utilized when primary channel is busy
Solution Approach 1:
The patent changes the access parameters for secondary channels independently from the primary channel. Stations can apply different back-off procedures and timing parameters to secondary channels based on their specific conditions, allowing flexible bandwidth utilization while maintaining the reliability of primary channel access control.
Solution Approach 2:
The patent introduces dynamic channel access by allowing stations to switch between primary and secondary channels based on real-time conditions. The back-off procedure information announced for secondary channels enables dynamic selection of access channels, improving bandwidth utilization while maintaining reliability through the established primary channel as a fallback.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A method and a device for operating in a wireless LAN system are disclosed. The method performed by a first station (STA) in a wireless LAN system, according to one embodiment of the present disclosure, may comprise the steps of: receiving, from a second STA, a first frame including information related to channel access for one or more non-primary channels; performing a first back-off procedure in a first non-primary channel from among the one or more non-primary channels on the basis of the first frame; and, on the basis of the first frame and the first back-off procedure, transmitting a second frame to the second STA or receiving the second frame from the second STA in one or more channels including the first non-primary channel.