公开(公告)号：US20170251449A1

公开(公告)日：2017-08-31

申请号：US15257824

申请日：2016-09-06

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Ravi Hiranand Gidvani ,  Carlos Horacio Aldana

IPC: H04W64/00 ,  H04W56/00

CPC classification number: H04W64/003 ,  H04L27/2602 ,  H04W4/06 ,  H04W56/0065 ,  H04W84/12

Abstract: Disclosed embodiments pertain to a first STA may broadcast a first Null Data Packet Announcement (NDPA) frame with an indication of one or more second STAs being polled. Subsequent to the first NDPA frame, a Null Data Packet (NDP) frame may be broadcast from a plurality of antennas on the first STA and one or more corresponding first Fine Timing Measurement (FTM) frames may be received in response. Each corresponding first FTM frame may be received from a distinct corresponding second STA and may comprise corresponding ranging measurements between the first STA and the corresponding second STA as determined by the corresponding second STA based on the NDP frame. In some embodiments, the one or more corresponding first FTM frames may be: received in response to a previously broadcast trigger frame, and encoded using Orthogonal Frequency Division Multiple Access. The trigger frame may be broadcast subsequent to the NDP frame.

公开(公告)号：US10104635B2

公开(公告)日：2018-10-16

申请号：US15257824

申请日：2016-09-06

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Ravi Hiranand Gidvani ,  Carlos Horacio Aldana

IPC: H04H20/71 ,  H04W64/00 ,  H04W56/00 ,  H04W4/06 ,  H04W84/12 ,  H04L27/26

Abstract: Disclosed embodiments pertain to a first STA may broadcast a first Null Data Packet Announcement (NDPA) frame with an indication of one or more second STAs being polled. Subsequent to the first NDPA frame, a Null Data Packet (NDP) frame may be broadcast from a plurality of antennas on the first STA and one or more corresponding first Fine Timing Measurement (FTM) frames may be received in response. Each corresponding first FTM frame may be received from a distinct corresponding second STA and may comprise corresponding ranging measurements between the first STA and the corresponding second STA as determined by the corresponding second STA based on the NDP frame. In some embodiments, the one or more corresponding first FTM frames may be: received in response to a previously broadcast trigger frame, and encoded using Orthogonal Frequency Division Multiple Access. The trigger frame may be broadcast subsequent to the NDP frame.