Multi-Link Device Frame Configuration for Wireless LAN
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Solution Overview
Problem
The existing wireless LAN standards face challenges in determining the structure of frames transmitted or received by multi-link devices and interpreting fields within these frames, particularly in including MAC addresses and neighbor AP information, which affects compatibility and efficiency in high-density environments.
Innovation Solution
A method is introduced where a multi-link device transmits a request message to an access point with a multi-link element containing a type subfield, which determines the inclusion of STA MAC address and MLD MAC address subfields, and decodes neighbor AP information based on the frame type, allowing for efficient frame configuration and backward compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-link device includes both STA MAC address subfield and MLD MAC address subfield in the multi-link element, then the frame structure can identify specific stations and the multi-link device, but the frame complexity and processing overhead increase
Solution Approach 1:
The patent applies dynamics by making the multi-link element structure adaptable based on the type subfield value. When type is 0, both STA MAC address subfield and MLD MAC address subfield are included for complete identification. When type is 1, only MLD MAC address subfield is included, simplifying the structure. This dynamic configuration resolves the contradiction by adjusting frame complexity according to identification needs.
2Adaptability or versatility
If the multi-link element uses a fixed structure with all subfields, then compatibility with existing standards is maintained, but the efficiency in high-density environments decreases due to increased processing overhead
Solution Approach 1:
The patent applies partial action by selectively including only the necessary subfields in the multi-link element based on the type subfield. Instead of always including all possible subfields (excessive action), the system includes only what is needed: both STA MAC and MLD MAC subfields when type is 0, or only MLD MAC subfield when type is 1. This reduces processing overhead in high-density environments while maintaining compatibility through the type indicator.
Solution Approach 2:
The patent changes the structural parameters of the multi-link element based on the type subfield parameter. The presence or absence of the STA MAC address subfield is controlled by the type parameter value (0 or 1), allowing the frame structure to adapt its complexity level. This parameter-driven structural change improves processing efficiency while preserving standard compatibility.
3Loss of information
If neighbor AP information is decoded for all received frames, then complete information is obtained, but the energy consumption and processing time increase in high-density environments
Solution Approach 1:
The patent applies partial action to the decoding process by selectively decoding neighbor AP information based on the frame type. Instead of decoding all neighbor AP information in every frame (excessive action), the system decodes only when necessary - specifically when the type subfield indicates a basic multi-link device. This selective approach reduces processing time and energy consumption in high-density environments while maintaining information completeness when needed.
Data Source
AI summary
Disclosed is a method by which a station (STA) of a multi-link device (MLD) transmits frames in a wireless communication system. In the present invention, an MLD transmits, to an AP MLD including at least one access point (AP), a request message related to a channel access, and receives a response message in response to the request message.