ML Probe Request Frame Overhead Reduction in WLAN MLD Systems
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Solution Overview
Problem
In next-generation wireless local area network (WLAN) systems, such as IEEE 802.11be or EHT, the existing method for requesting and responding to information across multiple links is inefficient, leading to increased frame overhead and suboptimal signaling due to the inclusion of per-STA profiles for each transmitting STA in Multi-Link (ML) probe request frames.
Innovation Solution
The proposed method optimizes signaling by excluding the per-STA profile sub-elements from the ML probe request frame when a non-AP STA requests the same partial information for all transmitting STAs within a Multi-Link Device (MLD), using only the (Extended) Request element in the frame body, which reduces frame overhead and enables efficient information exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If per-STA profile sub-elements are included for each transmitting STA in ML probe request frames, then complete information can be requested for each STA, but frame overhead increases and signaling efficiency deteriorates
Solution Approach 1:
The patent extracts and removes redundant per-STA profile sub-elements from the ML probe request frame when the same information is requested for multiple STAs. Only the necessary (Extended) Request element is retained in the frame body, while individual profile sub-elements are omitted, thereby reducing frame overhead while maintaining the ability to request required information.
Solution Approach 2:
The patent makes the (Extended) Request element universal by enabling it to request the same partial information for all transmitting STAs simultaneously. This single element serves the function previously requiring multiple separate per-STA profile sub-elements, allowing one element to perform multiple information request functions across different STAs.
2Loss of information
If per-STA profile sub-elements are included for each transmitting STA, then specific information for each STA can be requested, but signaling efficiency decreases
Solution Approach 1:
The patent merges multiple identical (Extended) Request elements that would otherwise be repeated in each per-STA profile into a single instance in the frame body. This combination maintains the ability to request specific partial information for all STAs while significantly reducing the number of signaling elements required, thereby improving signaling efficiency.
3Loss of information
If the same partial information is requested for all transmitting STAs using individual per-STA profiles, then information can be obtained for each STA, but frame size increases
Solution Approach 1:
The patent extracts only the essential (Extended) Request element from each would-be per-STA profile and places it once in the frame body. The redundant profile wrappers and repeated request elements are removed, extracting the core functionality while minimizing frame size for requesting the same partial information across multiple STAs.
Data Source
AI summary
Proposed are a method and a device for requesting the same partial information for all transmission STAs within a transmission MLD and responding thereto in a wireless LAN system. Specifically, a reception MLD transmits an ML probe request frame through a first link from the transmission MLD. The reception MLD receives an ML probe response frame through the first link from the transmission MLD. The ML probe request frame includes a first frame body and a probe request ML element. When the first reception ST A requests the same partial information for all transmission STAs, the first frame body includes a first request element and the probe request ML element does not include a profile sub-element of the second transmission STA.