公开(公告)号：US10588069B1

公开(公告)日：2020-03-10

申请号：US15801732

申请日：2017-11-02

Applicant: Amazon Technologies, Inc.

Inventor： Xi Chen ,  Ashish Kumar Shukla ,  Avinash Joshi ,  Qiang Hu

IPC: H04W40/04 ,  H04L12/721 ,  H04L12/875 ,  H04W84/18

Abstract: A method of route discovery in wireless mesh networks comprises: receiving, by a first mesh network device of a wireless mesh network, from a second mesh network device of the wireless mesh network, a first route request identifying a destination mesh network device of the wireless mesh network and a first path selection metric value; determining a path selection metric increment, wherein the path selection metric increment reflects a radio channel contention by the first mesh network device and the second mesh network device; generating a second path selection metric value by adding the path selection metric increment to the first path selection metric value; and broadcasting a second route request identifying the destination mesh network device and the second path selection metric value.

公开(公告)号：US11510028B1

公开(公告)日：2022-11-22

申请号：US17350839

申请日：2021-06-17

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：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.