WLAN Management Frame QoS Negotiation for Data Frame Protection
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Solution Overview
Problem
Recent amendments to IEEE 802.11 standards have increased the number and type of management frames, leading to increased network management traffic, which if prioritized as the highest priority, can adversely affect overall network performance and Quality of Service (QoS) for data frames.
Innovation Solution
Implementing a prioritization scheme that defines various access categories for management frames, allowing for dynamic adjustment of their transmission priorities based on a default and advertised MFQ policy, with the option for individual stations to negotiate a different policy with the access point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If management frames are prioritized as the highest priority according to current IEEE 802.11 standards, then management frame transmission reliability is improved, but overall network performance and QoS for data frames deteriorate
Solution Approach 1:
The patent segments management frames into different priority categories based on their criticality. Critical management frames (e.g., beacon frames, authentication frames) are transmitted with highest priority, while non-critical management frames are transmitted with lower priorities, allowing data frames to share the wireless medium more effectively.
Solution Approach 2:
The patent applies different quality of service treatments to different types of management frames based on their specific requirements. Each management frame type is assigned appropriate EDCA parameters (contionion window size, arbitration interframe space, transmission opportunity) according to its criticality, rather than treating all management frames uniformly.
2Reliability
If management frames are transmitted with highest priority, then management frame delivery is ensured, but QoS for data frames deteriorates
Solution Approach 1:
The patent introduces dynamic QoS negotiation between access points and stations. The QoS parameters for management frames can be adjusted based on current network conditions, traffic load, and specific service requirements, allowing flexible trade-offs between management frame delivery and data frame QoS.
Solution Approach 2:
The patent changes the EDCA parameters (contionion window minimum, contention window maximum, arbitration interframe space, transmission opportunity) for different management frame categories. By adjusting these parameters, the system can control the priority of management frames without completely blocking data frame transmissions, thus maintaining data frame QoS.
3Adaptability or versatility
If increased number of management frames are transmitted, then network management capability is improved, but network performance deteriorates
Solution Approach 1:
The patent segments management traffic into critical and non-critical categories, allowing the network to support increased management frame types and numbers while preventing non-critical management frames from degrading overall network performance.
Solution Approach 2:
The patent introduces QoS negotiation mechanisms as intermediaries between management frame requirements and network resource allocation. This allows the network to accommodate diverse management frame types while maintaining performance through coordinated resource distribution.
Data Source
AI summary
An access point advertises a management frame quality of service (MFQ) policy that defines an access category used for transmitting a first type of management frame. Each mobile station associated with the access point is to prioritize transmission of management frames according to the MFQ policy advertised by the access point, unless a policy configuration request for the mobile station to prioritize transmission of management frames according to a different MFQ policy has been accepted.