公开(公告)号：US11070945B1

公开(公告)日：2021-07-20

申请号：US16943172

申请日：2020-07-30

Applicant: Amazon Technologies, Inc.

Inventor： Qinghai Gao ,  Qiang Hu ,  Avinash Joshi ,  Piyush Tayal ,  QingYun Wei ,  Xiaofu Ma

IPC: H04W4/02 ,  H04W76/15 ,  H04W84/12

Abstract: Techniques for performing high-precision presence detection by establishing and monitoring peer-to-peer communication links between user devices residing in a same physical environment. A user device that resides in the environment may establish communication links with multiple other user devices residing in the environment. The user device may monitor the channel properties for those communication links to detect fluctuations in the channel properties caused by a user moving through a signal of the communication links. In examples where the user device detects fluctuations in channel properties for multiple communication links, the user device may determine that the user had moved though signals of the communication links. The user device may determine that, because the user moved through signals of multiple communication links, the user may be in close proximity to the user device, such as in the same room. Thus, the user device monitors multiple communication links to perform presence-detection techniques.

公开(公告)号：US10440631B1

公开(公告)日：2019-10-08

申请号：US15804362

申请日：2017-11-06

Applicant: Amazon Technologies, Inc.

Inventor： Avinash Joshi ,  Ashish Kumar Shukla

IPC: H04W40/00 ,  H04W40/28 ,  H04L12/46 ,  H04L12/725 ,  H04L12/935 ,  H04W84/18

Abstract: A method of payload type aware routing in wireless mesh networks comprises: identifying, by a first mesh network device of a wireless mesh network, a plurality of path selection metric types supported by the wireless mesh network; identifying, by inspecting an outgoing data frame, a path selection metric type corresponding to a payload type of the outgoing data frame; determining that the path selection metric type is comprised by the plurality of path selection metric types supported by the wireless mesh network; determining, using the path selection metric type, a network path to a destination mesh network device of the outgoing data frame, wherein the network path comprises an identifier of an intermediate mesh network device between the first mesh network device and the destination mesh network device; and transmitting the outgoing data frame to the intermediate mesh network device.

公开(公告)号：US10219142B2

公开(公告)日：2019-02-26

申请号：US15595479

申请日：2017-05-15

Applicant: Amazon Technologies, Inc.

Inventor： Lori Yoshida ,  Varadarajan Gopalakrishnan ,  Sheung Mei Chan ,  Avinash Joshi ,  Andrew David Price ,  Jungtao Liu

IPC: H04W8/00 ,  H04W4/80 ,  H04W76/14 ,  H04B7/04 ,  H04W84/18

Abstract: Network hardware devices organized in a wireless mesh network (WMN) in which one network hardware devices includes multiple radios. A processing device of a first network hardware device receives, via a first radio, a beacon frame from a second mesh network device, scans, via a second radio, for a second mesh frame of the second mesh network device, and receives the mesh frame. The processing device determines a first sector identifier that identifies an antenna from which the mesh frame is transmitted, a first signal strength indicator value corresponding to the mesh frame, an unused radio and an unused channel of the second mesh network device. The processing device sends a first message to the unused radio of the second mesh network device on the unused channel via the second radio, receives a second message, and configures the multiple radios to communicate with the second mesh network device.

公开(公告)号：US20180331914A1

公开(公告)日：2018-11-15

申请号：US15595479

申请日：2017-05-15

Applicant: Amazon Technologies, Inc.

Inventor： Lori Yoshida ,  Varadarajan Gopalakrishnan ,  Sheung Mei Chan ,  Avinash Joshi ,  Andrew David Price ,  Jungtao Liu

IPC: H04L12/24 ,  H04W4/00 ,  G08C15/02 ,  H04W84/18

CPC classification number: H04W8/005 ,  H04B7/04 ,  H04W4/80 ,  H04W76/14 ,  H04W84/18

Abstract: Network hardware devices organized in a wireless mesh network (WMN) in which one network hardware devices includes multiple radios. A processing device of a first network hardware device receives, via a first radio, a beacon frame from a second mesh network device, scans, via a second radio, for a second mesh frame of the second mesh network device, and receives the mesh frame. The processing device determines a first sector identifier that identifies an antenna from which the mesh frame is transmitted, a first signal strength indicator value corresponding to the mesh frame, an unused radio and an unused channel of the second mesh network device. The processing device sends a first message to the unused radio of the second mesh network device on the unused channel via the second radio, receives a second message, and configures the multiple radios to communicate with the second mesh network device.