公开(公告)号：US11510172B1

公开(公告)日：2022-11-22

申请号：US17191547

申请日：2021-03-03

申请人： Amazon Technologies, Inc.

发明人： Wei Feng ,  Chunho Lee ,  Haopeng Li

IPC分类号： H04W64/00 ,  G01S5/14 ,  H04W24/10 ,  H04W84/12

摘要： Technologies directed to device detection and locationing are described. One method includes establishing a first wireless connection between a first wireless device and a second wireless device on a first channel. The first wireless device sends to the second wireless device a first indication that the first wireless device is to operate in an off-channel mode with a third wireless device at a first location a Fine Timing Measurement (FTM) procedure. The first wireless device performs a first FTM process between the first wireless device and the third wireless device. The first device determines first timing data including a signal round trip time (RRT) associated with the first FTM process and determines a first distance between the first wireless device and the third wireless device based on the first timing data. A second location of the first wireless device is determined using the first distance.

公开(公告)号：US11729813B1

公开(公告)日：2023-08-15

申请号：US17336035

申请日：2021-06-01

申请人： Amazon Technologies, Inc.

发明人： Haopeng Li ,  Chunho Lee ,  Wei Feng

IPC分类号： H04W72/566 ,  H04L1/00 ,  H04W74/02 ,  H04W72/1263 ,  H04W84/12

CPC分类号： H04W72/569 ,  H04L1/0003 ,  H04W72/1263 ,  H04W74/02 ,  H04W84/12

摘要： Technologies directed to providing multimedia service over an extended range Wireless Local Area Network (WLAN) (e.g., IEEE 802.11ah) are described. In one method, a first wireless device identifies a first portion of media data as having a first priority value and a second portion of the media data as having a second priority value that is less than the first priority value. The first wireless device modulates the first portion to obtain first modulated data using a first modulation and coding scheme (MCS) that has symbol repetition and modulates the second portion to obtain second modulated data using a second MCS in which there is no symbol repetition. The first wireless device sends the first modulated data to a second wireless device in the wireless network and sends the second modulated data to the second wireless device after sending the first modulated data.