Channel Access Parameter Set for WLAN QoS
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Solution Overview
Problem
The existing channel access methods in 802.11-based wireless local area networks (WLANs, particularly in public environments, fail to meet the quality of service (QoS) requirements due to new properties such as multiple owners and dynamic deployment, as they do not adequately prioritize device access based on service types and network conditions.
Innovation Solution
A method and device for transmitting a channel access parameter set that determines priority parameters for each basic service set (BSS) and service, using interframe space (IFS) and contention window (CW) settings, to ensure that devices with higher priority access the channel efficiently, thereby ensuring QoS by adjusting DIFS and CW values based on BSS rankings and service priorities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing 802.11 EDCA mechanism is used for channel access, then services with different QoS requirements can contend for the channel based on service types, but it fails to meet the QoS requirements in public WLAN environments with multiple owners and dynamic deployment
Solution Approach 1:
The patent segments the channel access mechanism by introducing BSS-level priority parameters that divide the network into prioritized groups. Each BSS is assigned a priority level, and devices inherit channel access priorities from their BSS, enabling differentiated access control in public WLAN environments while maintaining service-type-based prioritization within each BSS.
Solution Approach 2:
The patent implements dynamic channel access parameters by allowing BSS priority configurations to be adjusted based on network conditions, owner preferences, and service requirements. The DIFS and CW parameters are dynamically set according to BSS priority rankings, enabling adaptive response to changing public WLAN environments.
2Ease of operation
If channel access parameters are uniformly set for all devices, then the system is simple to manage, but devices with different service types cannot achieve differentiated QoS
Solution Approach 1:
The patent applies local quality by assigning different channel access parameters to devices based on their BSS membership and service type. Instead of uniform parameters for all devices, each device receives customized DIFS and CW values according to its BSS priority and service category, enabling localized QoS optimization while maintaining centralized parameter management.
3Productivity
If multiple BSSs with different priorities access the channel simultaneously, then channel utilization increases, but collision probability increases without proper prioritization
Solution Approach 1:
The patent implements preliminary action by pre-configuring BSS priority levels and corresponding channel access parameters before channel contention occurs. Devices perform preliminary checks of their BSS priority and adjust their DIFS and CW values accordingly before attempting channel access, preventing collisions through advance prioritization rather than reactive conflict resolution.
Data Source
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AI summary
The present invention provides a method and an apparatus for sending a channel access parameter. The method comprises: based on at least one priority parameter, determining a channel access parameter set used by a first device in a first BSS for channel access, wherein the channel access parameter set is used for representing a priority of the first device to access a channel among all devices that compete for channel access and the at least one priority parameter comprises priorities of BSSs where all the devices that compete for channel access are located; and sending the channel access parameter set to the first device so as to enable the first device to access the channel. Accessing the channel based on the channel access parameter provided by a technical scheme in the present invention can meet a QoS requirement of a user.