Invention Grant
- Patent Title: Fine timing measurement transmissions between APs
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Application No.: US14501868Application Date: 2014-09-30
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Publication No.: US09456306B2Publication Date: 2016-09-27
- Inventor: Qi Wang , Matthew James Fischer
- Applicant: BROADCOM CORPORATION
- Applicant Address: US CA Irvine
- Assignee: BROADCOM CORPORATION
- Current Assignee: BROADCOM CORPORATION
- Current Assignee Address: US CA Irvine
- Agency: Garlick & Markson
- Agent Shayne X. Short
- Main IPC: H04W4/02
- IPC: H04W4/02 ; G01S5/10 ; H04W52/02

Abstract:
A wireless communication device (WDEV) receives, detects, snoops, etc. (generally, “receives”) signals that are transmitted between two other WDEVs and extracts information therefrom to determine the location of the WDEV. These signals can include fine timing measurement (FTM) and/or timestamps related information as part of a frame exchange procedure between those two other WDEVs. A new protocol specifies when such an FTM and/or timestamps frame exchange procedure is performed between the two other WDEVs, and the WDEV intelligently detects/receives such signals at such specified times. When the WDEV operates in a reduced power or sleep state, the WDEV awakens from the reduced power or sleep state at the appropriate times to detect FTM and/or timestamps related information of such a frame exchange procedure. The WDEV then can process such FTM and/or timestamps related information for use in determining the location of the WDEV relative to the two other WDEVs.
Public/Granted literature
- US20150094103A1 Fine timing measurement transmissions between APs Public/Granted day:2015-04-02
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