Multi-AP Candidate Set Discovery for STA Association
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Solution Overview
Problem
Existing technologies do not adequately address how a station (STA) discovers a multi-AP candidate set and associates with it for multi-AP coordinated transmission, lacking clarity in multi-AP capability information and frame structures for discovery and association.
Innovation Solution
A method and device for wireless communication that enables a STA to discover and associate with a multi-AP candidate set through active and passive scanning, utilizing specific frame structures and information exchange to facilitate multi-AP coordinated transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multi-AP coordination is introduced to improve transmission capability, then transmission capability is improved, but the complexity of discovering and associating with multi-AP candidate sets increases
Solution Approach 1:
The patent segments the multi-AP candidate set information into multiple components: BSS color information for initial identification, multi-AP candidate set information elements for detailed configuration, and separate association procedures. This segmentation allows STAs to discover and associate with multi-AP sets in a structured, step-by-step manner, reducing the overall complexity while maintaining improved transmission capability.
Solution Approach 2:
The patent implements preliminary actions by having APs pre-broadcast multi-AP candidate set information elements in beacon frames and probe response frames before STAs attempt association. This pre-publication of candidate set information allows STAs to make informed decisions about which multi-AP sets to join, simplifying the discovery process and reducing association complexity.
2Difficulty of detecting and measuring
If multi-AP candidate set information is broadcast in beacon frames, then discovery capability is improved, but the amount of information to be processed increases
Solution Approach 1:
The patent extracts multi-AP candidate set information from the main beacon frame body and places it in dedicated information elements with specific element IDs. This extraction allows the information to be organized in a standardized, easily parseable format that reduces processing overhead while improving discoverability. STAs can efficiently locate and process only the relevant multi-AP information without parsing the entire beacon frame.
Solution Approach 2:
The patent changes the parameter representation by using compact fields such as BSS color (6 bits), candidate set ID (8 bits), and AP count (8 bits) within the information elements. These parameter changes reduce the information volume compared to broadcasting full AP lists and configurations, while still providing sufficient information for effective discovery and association.
3Ease of operation
If specific frame structures are defined for multi-AP association, then association process is standardized, but the complexity of frame processing increases
Solution Approach 1:
The patent creates universal frame structures that can be used for both single-AP and multi-AP associations. The association request and response frames include flexible fields that can accommodate either single-AP or multi-AP candidate set information, allowing the same frame formats to serve multiple purposes. This universality standardizes the association process while avoiding the need for entirely new complex frame structures.
Solution Approach 2:
The patent inverts the traditional approach by having the AP include multi-AP candidate set information in the association response frame rather than requiring the STA to request it separately. This inversion simplifies the frame processing by consolidating information delivery into a single response, reducing the number of exchange steps and processing complexity while maintaining standardization.
Data Source
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AI summary
Embodiments of the present application provide a wireless communication method and a device. On the basis of different wired and wireless multi-AP collaboration architectures, a multi-AP collaboration capability discovery method and a multi-AP capability unit are designed, a method for establishing a multi-AP candidate set and a frame structure used thereby are designed, and a method for an STA to discover a multi-AP candidate set and a method for an STA to associate a multi-AP candidate set are also designed.