WLAN Transmission MLD Probe Requests for Partial AP Information
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Solution Overview
Problem
The increased number of spatial streams in new WLAN standards like IEEE 802.11be requires improved signaling techniques for efficient communication, particularly in requesting partial information on access points (APs) to reduce frame overhead.
Innovation Solution
A method and apparatus for requesting partial information on APs in a wireless LAN system by including a request element in the multi-link element of a probe request frame, allowing a non-AP STA to request specific AP information through a probe request frame, and setting an indicator for including the request element in the profile field of the receiving STA.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a non-AP STA requests complete information on all APs through probe request frames in MLD communication, then information completeness is improved, but frame overhead increases
Solution Approach 1:
The patent segments the information request by introducing a request element that specifies which APs' information is needed. Instead of requesting complete information on all APs, the non-AP STA can request partial information on specific APs by setting the request element, thereby reducing frame overhead while maintaining information completeness for the requested APs.
Solution Approach 2:
The patent applies partial action by allowing the non-AP STA to request only the necessary information on specific APs rather than complete information on all APs. The request element enables selective information retrieval, reducing unnecessary data transmission and processing overhead.
2Adaptability or versatility
If the request element is included in the multi-link element of the probe request frame, then partial information request capability is improved, but frame structure complexity increases
Solution Approach 1:
The patent merges the request element with the existing multi-link element structure in the probe request frame. By integrating the request element into the multi-link element, the patent avoids creating a completely new frame structure, thereby limiting the increase in frame structure complexity while still providing partial information request capability.
Solution Approach 2:
The multi-link element is enhanced to serve multiple functions: it continues to handle multi-link operations while also incorporating the request element for partial information requests. This universal approach allows the same structural component to handle both existing and new functions without requiring separate frame structures.
3Loss of information
If complete information profiles are transmitted for all APs, then information completeness is improved, but communication time increases
Solution Approach 1:
The patent segments the information transmission by using the request element to specify which APs' information is needed. The transmitting MLD then transmits complete information profiles only for the requested APs rather than all APs, reducing communication time while maintaining information completeness for the requested APs.
Solution Approach 2:
The patent applies partial action by transmitting only the necessary information profiles for the requested APs rather than complete information on all APs. This selective information transmission reduces communication time and processing requirements while ensuring information completeness for the targeted APs.
Data Source
AI summary
Proposed are a method and a device for requesting partial information on APs in a transmission MLD in a WLAN system. Specifically, a receiving MLD transmits a probe request frame to a transmission MLD through a first link. The receiving MLD receives a probe response frame from the transmission MLD through the first link. The probe request frame includes a profile field of the second receiving STA. The profile field of the second receiving STA includes a first full information profile subfield. When the first receiving STA requests partial information on the second link, the value of the first full information profile subfield is set to 0, and the profile field of the second receiving STA further includes a first request element. The partial information on the second link is requested on the basis of the first request element.