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Reception of management frames for multiple basic services sets (BSSs)

專利號
US11399352B2
公開日期
2022-07-26
申請人
QUALCOMM Incorporated(US CA San Diego)
發(fā)明人
Abhishek Pramod Patil; Yongchun Xiao; Ravi Gidvani; Sandip HomChaudhuri; Pradeep Kumar Yenganti; Arul Davidson Emmanuel; James Simon Cho; Padmanabhan Venkataraman Karthic; George Cherian; Alfred Asterjadhi; Jouni Kalevi Malinen
IPC分類
H04W56/00; H04W84/12; H04L5/00
技術領域
bss,nontxbssid,management,bssid,frame,profile,dtim,sta,vap,may
地域: CA CA San Diego

摘要

This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for analyzing management frames for multiple basic service sets (BSSs). In one aspect, a wireless node may obtain a first management frame from a wireless local area network (WLAN) apparatus, the WLAN apparatus operating multiple virtual access points (VAPs) respectively corresponding to multiple BSSs. The wireless node may determine whether the first management frame includes a BSS profile of a BSS associated with the wireless node based, at least in part, on an arrangement of a plurality of BSS profiles within one or more management frames. The wireless node may determine to further process the first management frame based, at least in part, on a determination that the first management frame includes the BSS profile of the BSS associated with the wireless node.

說明書

In some implementations, the management frame generation module 172 of the WLAN apparatus 150 may prepare DTIM management frames (such as DTIM Beacon Frames) that include NonTxBSSID profiles for all of the NonTxBSSIDs supported by the WLAN apparatus 150. The set of NonTxBSSID profiles may have the same DTIM interval in order to generate DTIM management frames that include the same set of NonTxBSSID profiles. In some implementations, the management frame analysis module 125 of the STA 120 may implement a power save technique that performs one or more initial checks on the received management frame to identify a DTIM management frame and determine whether the NonTxBSSID profile associated with the STA 120 has changed. The management frame analysis module 125 may determine to check for DTIM management frames after monitoring management frames generated by the WLAN apparatus 150 and determining the DTIM management frames generated the WLAN apparatus 150 include NonTxBSSID profiles for all of the supported NonTxBSSIDs. Therefore, whether or not the management frame is a DTIM management frame is a frame characteristic the management frame analysis module 125 can check to determine whether the management frame will include the NonTxBSSID profile associated with the STA 120. The management frame analysis module 125 may ignore or discard non-DTIM management frames to save power, and may perform EBT on the DTIM management frame to determine whether or not to wake up the processing module 128 (which may include the host processor) to perform additional processing on the management frame. When performing EBT, the management frame analysis module 125 may perform a length comparison operation for the DTIM management frame. When the management frame analysis module 125 determines the length of the DTIM management frame is different than the length of the previously received DTIM management frame, then the management frame analysis module 125 may perform an additional comparison operation, such as a hash function of information in the Multiple BSSID element. For example, the management frame analysis module 125 may perform a hash function of certain profile information of the BSS profile associated with the STA 120 and compare the results of the hash function to the expected hash function results (such as the hash function results of a previously received DTIM management frame). If the hash function results are a match, then the DTIM management frame is ignored or discarded because the BSS profile likely has not changed. If the hash function results do not match, then the management frame analysis module 125 may request the processing module 128 to perform further processing on the DTIM management frame. For example, the host processor may be further process the DTIM management frame to determine the change in the BSS configuration.

權利要求

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