Partial Information Request in Wireless LAN Multi-Link Devices
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Solution Overview
Problem
Current wireless LAN systems face challenges in efficiently utilizing increased spatial streams and bandwidth in new communication standards, such as IEEE 802.11be, due to limitations in signaling techniques.
Innovation Solution
A method and apparatus for requesting partial information from Access Points (APs) in a transmitting Multi-Link Device (MLD) in a wireless LAN system, which omits the Extended Request Element in the profile field of other APs when requesting the same partial information as a peer AP, thereby reducing unnecessary information duplication and frame overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the Extended Request Element is included in the profile field of each AP when requesting partial information, then the receiving STA can obtain complete information for each AP, but the frame overhead increases due to information duplication
Solution Approach 1:
The patent merges the information request for multiple APs into a single Extended Request Element in the multi-link element, rather than including separate request elements in each AP's profile field. This combining approach reduces frame overhead by eliminating redundant information while still enabling the receiving STA to obtain complete information for all requested APs through the unified request structure.
2Loss of information
If partial information is requested for each AP separately, then the receiving STA can obtain specific information for each AP, but the signaling complexity increases
Solution Approach 1:
The patent creates a universal Extended Request Element structure that can handle information requests for multiple APs simultaneously. This multi-functional element replaces the need for separate request mechanisms for each AP, reducing signaling complexity while maintaining the ability to request specific partial information for any combination of APs in the multi-link device.
3Loss of information
If complete information is requested for all APs, then the receiving STA can obtain all available information, but the frame size and processing overhead increase
Solution Approach 1:
The patent implements a partial action approach by enabling the receiving STA to request only the specific partial information needed for each AP through the Extended Request Element, rather than retrieving complete information for all APs. This selective information retrieval reduces frame size and processing time while still obtaining sufficient information for the receiving STA's needs.
Data Source
AI summary
Proposed are a method and a device for requesting partial information from APs within a transmission MLD in a WLAN system. Particularly, a reception MLD transmits a probe request frame to a transmission MLD via a first link. The reception MLD receives a probe response frame from the transmission MLD via the first link. When the partial information regarding the first link and the partial information regarding the second link are the same, the partial information regarding the second link is requested on the basis of the first request element, and a value of a first full information profile sub-field is set to 0.