Wireless LAN Uplink Sounding Triggering With UL NDP Indication
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Solution Overview
Problem
Existing methods for performing an uplink sounding procedure in a wireless LAN system are not efficient in transmitting and receiving trigger frames and NDP frames for uplink sounding procedures, particularly in next-generation wireless LAN systems.
Innovation Solution
A method and device for performing an uplink sounding procedure in a wireless LAN system by transmitting and receiving a trigger frame and an NDP frame, where the trigger frame includes first information indicating the solicitation of the UL NDP, based on a UL length field or a specific field related to a UL NDP request.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing methods are used for transmitting and receiving trigger frames and NDP frames, then the uplink sounding procedure can be performed, but the transmission and reception efficiency is insufficient
Solution Approach 1:
The patent applies preliminary action by including first information in the trigger frame that indicates the solicitation of UL NDP in advance. This allows the receiving station to prepare for and efficiently process the uplink sounding procedure without delay, as the necessary information is provided beforehand in the trigger frame structure.
Solution Approach 2:
The patent utilizes parameter changes by modifying the trigger frame structure to include first information that can indicate UL NDP solicitation. This parameter addition enables more efficient signaling and reduces the time required for uplink sounding procedures by providing explicit indication rather than requiring interpretation of existing fields.
2Productivity
If the trigger frame structure is extended to include first information for UL NDP solicitation, then the efficiency of uplink sounding procedure is improved, but the frame complexity increases
Solution Approach 1:
The patent applies universality by designing the first information in the trigger frame to serve multiple functions. The same field or structure can indicate UL NDP solicitation while maintaining compatibility with existing trigger frame processing, allowing a single element to perform both backward compatibility and new functionality.
Solution Approach 2:
The patent uses partial action by adding only the necessary first information to the trigger frame without completely redesigning the frame structure. This selective modification approach improves uplink sounding efficiency while minimizing the increase in overall frame complexity by only adding essential elements.
Data Source
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AI summary
A method and apparatus for operating in a wireless LAN system are disclosed. A method performed by a first station (STA) in a wireless LAN system, according to one embodiment of the present disclosure, comprises the steps of: receiving a trigger frame from a second STA; and transmitting an uplink (UL) null data physical layer protocol data unit (NDP) based on the trigger frame to the second STA, wherein the trigger frame comprises first information which indicates that the trigger frame is intended to solicit the UL NDP, wherein the first information may be indicated on the basis of at least one of a UL length field included in a common information field of the trigger frame or a specific field associated with the UL NDP solicitation.