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：US11218203B1

公开(公告)日：2022-01-04

申请号：US16776235

申请日：2020-01-29

Applicant: Amazon Technologies, Inc.

Inventor： Tzung-I Lee ,  Kun Ting Tsai ,  Haritha Tamvada ,  Kwok Shing Lee ,  Cheol Su Kim ,  Omar Fawazhashim Zakaria ,  In Chul Hyun ,  Ali Mirkamali ,  Dan Richard Brukwinski

IPC: H04B7/06 ,  H04B7/0413 ,  H01Q3/34 ,  H04W88/02 ,  H04W84/12

Abstract: Technologies directed to coordinated dynamic analog beamforming are described. One method includes receiving, by a digital controller of a first wireless device, a data packet, the data packet comprising a destination address of a second wireless device. The method further includes retrieving, from memory, beamformer configuration data associated with the destination address, the beamformer configuration data comprising a phase shifter angle value for a radiation pattern. The method sends, to a beamformer circuit, the phase shifter angle value, the beamformer circuit comprises a power splitter and a set of phase shifters (e.g., at least four). The method causes the set of phase shifters to steer the radiation pattern of electromagnetic energy, radiated by an antenna array of elements, at the phase shifter angle value and sends the data packet to the second wireless device via the antenna array.

公开(公告)号：US10887026B1

公开(公告)日：2021-01-05

申请号：US16794070

申请日：2020-02-18

Applicant: Amazon Technologies, Inc.

Inventor： Kun Ting Tsai ,  Nathan Labadie ,  Cheol Su Kim ,  Haritha Tamvada ,  Omar Fawazhashim Zakaria

IPC: H04B17/10 ,  H04B3/52 ,  H04B7/0408 ,  H04B17/318 ,  H01Q13/24 ,  H04W88/08 ,  H04B3/54

Abstract: Technologies directed to antenna disconnection detection of distributed radio frequency (RF) ports in a wireless network are described. One method receives data from the wireless devices and generates an RSSI matrix including multiple elements, each storing a receive signal strength indicator (RSSI) value indicative of a signal strength of a wireless link between a transmitter-receiver pair. The method identifies a characteristic pattern in the RSSI matrix. The characteristic pattern includes i) two or more RSSI values in a same row being less than the threshold value and ii) two or more RSSI values in a same column being less than the threshold value. The method stores an indication that an antenna is disconnected from an RF port and sends a command to the second wireless device that causes the second wireless device to disable a radio that is coupled to the RF port.

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：US11375395B2

公开(公告)日：2022-06-28

申请号：US16436193

申请日：2019-06-10

Applicant: Amazon Technologies, Inc.

Inventor： Chiu Ngok Eric Wong ,  Kun Ting Tsai ,  Xueheng Hu ,  Jian Lu ,  Armando J. Lucrecio

IPC: H04W28/02 ,  H04B17/318 ,  H04W72/04 ,  H04W84/18

Abstract: Network hardware devices organized in a wireless network. A controller device receives device information about each of a multiple network devices, network congestion at each device, scan data, and a station list from each of the devices. The controller device assigns a channel to each radio of the multiple network devices using the device information, the network congestion data, the scan data, and the station list and outputs a first subset of channel assignments to a first group of the network devices, a second subset of channel assignments to a second group of the network devices, and a third subset of channel assignments to a third group of the network devices.

公开(公告)号：US11153181B1

公开(公告)日：2021-10-19

申请号：US16703221

申请日：2019-12-04

Applicant: Amazon Technologies, Inc.

Inventor： Kun Ting Tsai ,  Haritha Tamvada ,  Kiran Kumar Edara ,  Andrew Price ,  Omar Fawazhashim Zakaria

IPC: G06F13/00 ,  H04L12/24 ,  H04L12/751 ,  H04L29/06 ,  H04L12/931 ,  H04L12/26 ,  H04L12/713

Abstract: Technologies directed to determining a role of a network device, configuring the network device according to the role, and provisioning the network device to a network are described. In one method, the hardware configuration information and external connection information are stored by the network device. The network device determines a role using the hardware configuration information and the external connection information without any manual intervention or manual configuration. The role can be any one of a Router Node, a Storage Node, a Base Station Node, a Relay Node, a Gateway Node, or a Customer Premises Equipment (CPE) Node. After recognizing the role, the network device can be configured and provisioned to the network without any manual intervention or manual configuration.

公开(公告)号：US10979885B1

公开(公告)日：2021-04-13

申请号：US16422786

申请日：2019-05-24

Applicant: Amazon Technologies, Inc.

Inventor： Ashish Kumar Shukla ,  Kun Ting Tsai ,  Karim Abulmakarem Mohamed Khalil ,  Burak Varan ,  Lori Yoshida ,  Kiran Kumar Edara

IPC: H04W8/00 ,  H04W84/18 ,  H04W40/24 ,  H04W72/04 ,  H04W74/08 ,  H04L5/00

Abstract: Network hardware devices organized in a wireless mesh network (WMN). A first mesh network device performs a three-stage discovery protocol; in a first stage, a discovery scan uses a first radio to find a set of neighbor devices in proximity; in a second stage, a discovery locate probe process is performed on a secondary discovery channel that is from a same frequency band group as a first DFS channel; in a third stage, a CAC is performed via the first DFS channel and, after the CAC, a neighbor peering request is sent and a neighbor peering response is received from a second mesh network device via a second radio. The neighbor peering response confirms establishment of a first communication channel between the second radio of the first mesh network device and a radio of the second mesh network device over the first DFS channel.

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：US10574316B1

公开(公告)日：2020-02-25

申请号：US15987684

申请日：2018-05-23

Applicant: Amazon Technologies, Inc.

Inventor： Ravi Ichapurapu ,  Shao-Cheng Wang ,  Vipul Jain ,  Kun Ting Tsai ,  Milos Jorgovanovic ,  Chirag Saurabh Bhavsar ,  Vinay Gotnakodlu Hegde

IPC: H04B7/06 ,  H04W4/80 ,  H04W8/00 ,  H04B17/318 ,  H04W84/12

Abstract: A device includes a first radio controller, a second radio controller, and a processor. The processor is configured to execute instructions for determining that a first signal strength of a signal received from a remote device by a first antenna electrically connected to the first radio controller is less than a minimum signal strength threshold for communications using the first antenna, identifying a network process configured to communicate with a remote device using the first radio controller or the second radio controller, and determining that the processor is not executing the network process. The processor is further configured to execute instructions for, determining a second signal strength of a second signal received from the remote device by a second antenna, determining the second signal strength is greater than the first signal strength, and causing the first radio controller to communicate using the second antenna.

公开(公告)号：US10477585B1

公开(公告)日：2019-11-12

申请号：US16049593

申请日：2018-07-30

Applicant: Amazon Technologies, Inc.

Inventor： Kun Ting Tsai ,  Chirag Bhavsar ,  Huanchun Ye ,  Varadarajan Gopalakrishnan ,  QingYun Wei ,  Morris Hsu ,  James Edwin Christy

IPC: H04W74/08 ,  H04B15/02 ,  G06F3/16

Abstract: Microwave interference mitigation techniques and systems are disclosed herein. In some embodiments, microwave interference mitigation involves coordinating wireless traffic in accordance with a magnetron's on-and-off cycle so that data is not sent during the magnetron's on period, and is exclusively sent during the magnetron's off period. Wireless traffic can be coordinated using a voltage monitoring and zero-crossing point detection technique coupled with a Clear To Send (CTS) packet. For non-microwave devices, wireless traffic coordination can be achieved using a pattern matching algorithm coupled with a Clear Channel Assessment (CCA) threshold adjustment during the magnetron's on-and-off cycles. Additional, or alternative, microwave interference mitigation techniques involve decreasing a maximum packet size for data packets that are to be transmitted wirelessly in the environment, which guarantees successful transmission of data packets during the magnetron's off periods.