Access Point Association Establishment Using Temporary Identifiers
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Solution Overview
Problem
In wireless communications using OFDMA technology, the access point (AP) struggles to establish associations with multiple stations (STAs) due to the lack of unique association identifiers, leading to reduced communication reliability as it cannot send accurate acknowledgement messages.
Innovation Solution
The AP broadcasts a trigger frame indicating available subchannels, receives association request messages, and sends a multi-block acknowledgement (M-BA) frame that includes association acknowledgement information, using either a temporary identifier or a pre-allocated association identifier to ensure each STA recognizes the acknowledgement, thus establishing a successful association.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the AP uses OFDMA to support simultaneous data transmission by multiple STAs, then the productivity of the wireless communication system is improved, but the device complexity increases due to the need to manage multiple associations without pre-allocated AIDs
Solution Approach 1:
The patent applies preliminary action by having the AP pre-allocate temporary AIDs to STAs before formal association is established. This temporary identification enables the AP to manage multiple simultaneous associations during the contention process, resolving the complexity issue while maintaining OFDMA productivity benefits
2Ease of operation
If the AP does not have pre-allocated AIDs for contending STAs, then the ease of operation is improved during initial association, but the reliability deteriorates because the AP cannot send accurate acknowledgement messages
Solution Approach 1:
The patent uses temporary AIDs as an intermediary mechanism that bridges the gap between initial association simplicity and reliable acknowledgement. The temporary AID serves as a placeholder that enables the AP to identify and acknowledge specific STAs during the association process, even before formal AID allocation occurs
3Reliability
If the AP allocates temporary AIDs to STAs during the association process, then the reliability of communication is improved through accurate acknowledgement, but the device complexity increases due to additional identifier management
Solution Approach 1:
The temporary AID allocation is implemented as a preliminary action that occurs automatically during the association contention process. This pre-allocation enables reliable communication from the outset without requiring complex post-hoc identifier management, as the temporary AIDs are naturally integrated into the OFDMA resource allocation framework
Data Source
AI summary
An association establishment method and apparatus for carrying out the method are described. The association establishment method includes broadcasting, by an access point (AP), a trigger frame, wherein the trigger frame is used to trigger one or more unassociated stations STAs to perform uplink data transmission and indicate one or more available subchannels for random accessing of the unassociated STAs. The method further comprises receiving, by the AP, one or more association request messages sent on available subchannels acquired by the unassociated STAs. Thereafter, the AP broadcasts a multi-block acknowledgement M-BA frame, wherein the M-BA frame includes one or more pieces of association acknowledgement information and the association acknowledgement information is acknowledgement information of the association request message.