公开(公告)号：US11606791B1

公开(公告)日：2023-03-14

申请号：US17317715

申请日：2021-05-11

Applicant: Amazon Technologies, Inc.

Inventor： Kun Ting Tsai ,  Nathan Labadie ,  Cheol Su Kim ,  Sarang Wagholikar ,  Omar Fawazhashim Zakaria

IPC: H04L12/28 ,  H04W72/0453 ,  H04J1/16 ,  H04W84/12

Abstract: Technologies directed to multi-tier coordinated dynamic frequency selection (DFS) service in a multi-tier wireless network are described. One method includes receiving, by a first wireless device, first data associated with a first set of DFS channels. The first wireless device performs a CAC on each DFS channel of the first set of DFS channels in a specified order. The first wireless device identifies a second set of DFS channels in which no radar event is found during the respective CAC and generates second data associated with the second set of DFS channels. The first wireless device receives a first request for the second data from a second wireless device. The first wireless device determines a receive signal strength indicator (RSSI) value associated with the first request and sends a first response, including the second data and the RSSI value, to the second wireless device

公开(公告)号：US10924343B1

公开(公告)日：2021-02-16

申请号：US16254355

申请日：2019-01-22

Applicant: Amazon Technologies, Inc.

Inventor： Ashish Kumar Shukla ,  Kiran Kumar Edara ,  Kun Ting Tsai ,  Sarang Wagholikar

IPC: H04L12/24 ,  H04L29/08 ,  H04W84/18

Abstract: Technology for event propagation and action coordination in a mesh network is described. In one embodiment, a master mesh node for a first communication channel in a mesh network receives a first event notification message from a first dependent mesh node associated with the master mesh node. The first event notification message pertains to a first event detected by the first dependent mesh node. In response, the master mesh node generates a first action message specifying a first action associated with the first event and sends the first action message to the first dependent mesh node and to a second dependent mesh node associated with the master mesh node. The master mesh node, the first dependent mesh node, and the second dependent mesh node all exchange communications with each other using the first communication channel in the mesh network.

公开(公告)号：US11659588B1

公开(公告)日：2023-05-23

申请号：US17160104

申请日：2021-01-27

Applicant: Amazon Technologies, Inc.

Inventor： Kun Ting Tsai ,  Nathan Labadie ,  Cheol Su Kim ,  King Shaw ,  Sarang Wagholikar ,  Omar Fawazhashim Zakaria

IPC: H04W72/56 ,  H04W72/0453

CPC classification number: H04W72/56 ,  H04W72/0453

Abstract: Technologies directed to prioritized channel coordination in a multi-tier wireless network are described. One method includes identifying a first group of wireless devices located in a first geographical area using physical proximity information. The method includes, for a first wireless device having a highest priority among the wireless device in the first geographical area, determining a penalty value for each channel of a plurality of available channels and selecting a first channel having a lowest penalty value. The method includes, for a second wireless device having a second-highest priority, determining a penalty value for each of the remaining channels in the plurality of available channels and selecting a second channel, from the remaining channels, having a lowest penalty value. The method includes sending to the first wireless device information about the first channel and sending to the second wireless device information about the second channel.

公开(公告)号：US10855351B1

公开(公告)日：2020-12-01

申请号：US16215186

申请日：2018-12-10

Applicant: Amazon Technologies, Inc.

Inventor： Kun Ting Tsai ,  Kiran Kumar Edara ,  Sarang Wagholikar ,  Omar Fawazhashim Zakaria ,  Ashish Kumar Shukla ,  Tzung-I Lee ,  Ali Mirkamali

IPC: H04B7/06 ,  H01Q21/28 ,  H01Q21/29 ,  H04B17/327 ,  H01Q25/00

Abstract: A wireless device includes a radio, a first directional antenna, a second directional antenna, an omnidirectional antenna, and a switch selectively coupled between the radio and the first directional antenna, the second directional antenna, and the omnidirectional antenna. A processor is coupled to the switch and to, for a frame: determine, based on an arbitration table, a destination medium access control address of a client wireless device and identifiers of antennas for transmitting the frame and receiving acknowledgement data; cause the switch to couple the radio to the first directional antenna; transmit the frame to the client wireless device via the first directional antenna, wherein the first client wireless device is located along a first direction with respect to the wireless device; cause the switch to couple the radio to the omnidirectional antenna; and receive an acknowledgment, corresponding to the frame, from the client wireless device via the omnidirectional antenna.

公开(公告)号：US11483844B1

公开(公告)日：2022-10-25

申请号：US16949901

申请日：2020-11-19

Applicant: Amazon Technologies, Inc.

Inventor： Kun Ting Tsai ,  Kiran Kumar Edara ,  Sarang Wagholikar ,  Omar Fawazhashim Zakaria ,  Ashish Kumar Shukla ,  Cheol Su Kim

IPC: H04W88/08 ,  H04B7/0404 ,  H04W84/18 ,  H04W72/08 ,  H04L67/10 ,  H04L41/12 ,  H04L5/00

Abstract: A wireless mesh network includes a first wireless access point (WAP) device designated as a primary device, where the first WAP device provides network connectivity to a plurality of client devices over a first dynamic frequency selection (DFS) channel. A second WAP device is designated as a secondary device to the first WAP device on the first DFS channel. In response to detection of a radar event by the first WAP device: the first WAP device transitions to being the secondary device on the first DFS channel; the second WAP device transitions to being the primary device on the first DFS channel; and the second WAP device performs a channel availability check (CAC) on a second DFS channel and communicates availability of the second DFS channel to the first WAP device.

公开(公告)号：US11469804B1

公开(公告)日：2022-10-11

申请号：US17464613

申请日：2021-09-01

Applicant: Amazon Technologies, Inc.

Inventor： Kun Ting Tsai ,  Manvendra Sharma ,  Tzung-I Lee ,  Cheol Su Kim ,  Sarang Wagholikar ,  Omar Fawazhashim Zakaria ,  Nathan Labadie

IPC: H04B7/06 ,  H04B17/318

Abstract: Technologies directed to sectorized analog beam searching are described. One method includes a first wireless device receiving a first destination address of a second wireless device, a first angle value corresponding to a first direction, and a second angle value corresponding to a second direction. The first wireless device generates a first signal beam transmitted in the first direction and spanning a first geographic region and receives an RSSI value corresponding to the first signal beam. The first wireless generates a second signal beam transmitted in the second direction and spanning a second geographic region and receives a second RSSI value corresponding to the second signal beam. The first wireless device determines that the first RSSI value is greater than the second RSSI value. The first wireless device determines, using a third signal beam a third angle value corresponding to a third direction located within the first geographic region.