公开(公告)号：US10608692B1

公开(公告)日：2020-03-31

申请号：US16196046

申请日：2018-11-20

Applicant: Amazon Technologies, Inc.

Inventor： Sameet Ramakrishnan ,  Ravi Ichapurapu ,  Ganesha Batta

IPC: H04B1/46 ,  H04B1/48 ,  H04W48/10 ,  H04B1/16

Abstract: Technologies for improving airtime for advertisement packet scanning are described. One apparatus includes a processing device, a memory device, a first radio, a second radio, and a single media access control (MAC) device coupled to the first radio and the second radio. The single MAC device assigns a single MAC address to the first radio and the second radio. The first radio receives first data and the second radio received second data and stores the second data in the memory device. The single MAC device processes the first data received from the radio and processes the second data retrieved from the memory device.

公开(公告)号：US10531316B1

公开(公告)日：2020-01-07

申请号：US16023382

申请日：2018-06-29

Applicant: Amazon Technologies, Inc.

Inventor： Ravi Ichapurapu ,  Sameet Ramakrishnan ,  Jagan Vaidyanathan Rajagopalan ,  Jay Shah ,  Rohit Sammeta

IPC: H04B7/00 ,  H04W24/02 ,  H04W76/23 ,  H04W48/18 ,  H04W36/30 ,  H04W72/04 ,  H04W88/10

Abstract: Systems, methods, and computer-readable media are disclosed for using shared antennas for multi-protocol communication. Example devices may include a first antenna, a second antenna, memory and at least one processor configured to access the memory and execute computer-executable instructions to determine a first request for a first wireless radio to transmit first data for a first duration, determine a second request for a second wireless radio to receive second data during the first duration, and determine that a first signal strength associated with the first wireless radio is less than or equal to a first threshold. Certain embodiments may be configured to determine that communication associated with the first wireless radio has a higher priority than communication associated with the second wireless radio, cause the first wireless radio to transmit the first data using a first antenna for the first duration, and cause a second antenna to be idle.

公开(公告)号：US12120534B1

公开(公告)日：2024-10-15

申请号：US17387703

申请日：2021-07-28

Applicant: Amazon Technologies, Inc.

Inventor： Ravi Ichapurapu ,  Durga Laxmi Narayana Swamy Inti ,  Dhruv Kohli ,  Adithya Subramanian

IPC: H04L12/00 ,  H04L67/12 ,  H04W24/02 ,  H04W24/10

CPC classification number: H04W24/02 ,  H04L67/12 ,  H04W24/10

Abstract: Technologies directed to interactive physical placement of devices for optimal motion sensing using channel state information (CSI) are described. A method includes determining that a size of received CSI data exceeds a first threshold or is received in a specified time interval, the CSI data representing channel properties in a wireless network of devices. The method further includes validating a physical placement of the wireless devices by i) determining that a parameter value associated with the CSI data is less than a second threshold representing a no-motion condition and the first CSI data matches ground truth data associated with the no-motion condition; or ii) determining that the parameter value is greater than a third threshold representing a motion condition and the first CSI data matches ground truth data associated with the motion condition. The method sends to a user device an indication that the physical placement is validated.

公开(公告)号：US12003400B1

公开(公告)日：2024-06-04

申请号：US17983275

申请日：2022-11-08

Applicant: Amazon Technologies, Inc.

Inventor： Durga Laxmi Narayana Swamy Inti ,  Kun Ting Tsai ,  Ravi Ichapurapu

IPC: H04W80/02 ,  H04B7/06 ,  H04B17/318 ,  H04L43/16 ,  H04W24/08 ,  H04W24/10

CPC classification number: H04L43/16 ,  H04B7/0626 ,  H04B17/318 ,  H04W24/08 ,  H04W24/10

Abstract: Techniques for presence detection are described. In an example, system receives, from a first device connected with a computer network that is associated with a location, a first value of a first parameter associated with a link between the first device and a second device. The system determines, using a first prediction model and the first value, a first likelihood of presence at the location. The first prediction model is configured based at least in part on outputs of a second prediction model that uses a second parameter associated with the computer network. The system determines whether the presence is detected at the location based at least in part on the first likelihood.

公开(公告)号：US11570632B1

公开(公告)日：2023-01-31

申请号：US15926778

申请日：2018-03-20

Applicant: Amazon Technologies, Inc.

Inventor： Ravi Ichapurapu ,  Morris Yuanhsiang Hsu ,  Milos Jorgovanovic ,  Pratik Kalpesh Patel

IPC: H04W84/12 ,  H04W84/18 ,  H04W80/04 ,  H04W8/26 ,  H04W88/06 ,  H04W24/02 ,  H04W4/80

Abstract: A computer-implemented method includes receiving, from an application framework, a set of tasks, a throughput requirement for each task of the set of tasks, and a set of active connections for a radio network comprising a Wi-Fi radio and a Zigbee radio. The computer-implemented method also includes determining, using the set of tasks, the throughput requirement for each task of the set of tasks, and the set of active connections, a target Wi-Fi radio duty cycle and setting the Wi-Fi radio to operate at the target Wi-Fi radio duty cycle. The computer-implemented method further includes monitoring, using a monitoring unit, air time statistics associated with the Wi-Fi radio, determining, using the air time statistics, a measured Wi-Fi duty cycle, and adjusting Wi-Fi radio settings to decrease a difference between the target Wi-Fi duty cycle and the measured Wi-Fi duty cycle.

公开(公告)号：US11546015B1

公开(公告)日：2023-01-03

申请号：US17322408

申请日：2021-05-17

Applicant: Amazon Technologies, Inc.

Inventor： Nathan Labadie ,  Cheol Su Kim ,  Ravi Ichapurapu ,  Kalyan Teja Posani ,  Omar Fawazhashim Zakaria ,  In Chui Hyun

IPC: H04B3/02 ,  H03F3/24 ,  H04B1/04 ,  H04B3/54 ,  H03M1/12 ,  H04B1/44

Abstract: Technologies directed to cable-loss compensation are described. An apparatus includes a triplexer, a front-end module (FEM) circuit, and a control circuit. The triplexer is coupled to a radio frequency (RF) cable. The triplexer receives a first RF signal and a DC power signal from a device via the RF cable and sends a detection signal being indicative of a transmit power level of the first RF signal to the device via the RF cable. The transmit power level includes an insertion loss of the RF cable. The FEM circuit is coupled to the triplexer and includes a power amplifier (PA). The control circuit is coupled to the triplexer and measures the transmit power level of the first RF signal and converts the first RF signal into the detection signal. The control circuit sends the detection signal back to the device via the RF cable and enables the PA.

公开(公告)号：US11539610B1

公开(公告)日：2022-12-27

申请号：US17073055

申请日：2020-10-16

Applicant: Amazon Technologies, Inc.

Inventor： Durga Laxmi Narayana Swamy Inti ,  Kun Ting Tsai ,  Ravi Ichapurapu

IPC: H04W24/08 ,  H04L43/16 ,  H04B7/06 ,  H04W24/10 ,  H04B17/318

Abstract: Techniques for presence detection are described. In an example, system receives, from a first device connected with a computer network that is associated with a location, a first value of a first parameter associated with a link between the first device and a second device. The system determines, using a first prediction model and the first value, a first likelihood of presence at the location. The first prediction model is configured based at least in part on outputs of a second prediction model that uses a second parameter associated with the computer network. The system determines whether the presence is detected at the location based at least in part on the first likelihood.

公开(公告)号：US11483046B1

公开(公告)日：2022-10-25

申请号：US17002328

申请日：2020-08-25

Applicant: Amazon Technologies, Inc.

Inventor： Kun Ting Tsai ,  Ravi Ichapurapu ,  Durga Laxmi Narayana Swamy Inti ,  Haritha Tamvada ,  Kiran Kumar Edara

IPC: H04B7/06 ,  H04B17/318 ,  H04L1/20 ,  H04W80/02

Abstract: Techniques for transmitting channel state information (CSI) are described. In an example, a device determines a condition associated with a link parameter of a link between the device and another device. Based at least in part on the condition, the device determines a CSI packet period. The device transmits, to the other device and based at least in part on the CSI packet period, a CSI packet over the link. Accordingly, when the conditions change, the CSI packet period can be adapted to the changes, thereby improving the CSI transmissions over the link given the most current conditions.

公开(公告)号：US20220161131A1

公开(公告)日：2022-05-26

申请号：US17514318

申请日：2021-10-29

Applicant: Amazon Technologies, Inc.

Inventor： Albert John Penello ,  Omar Sze Leung ,  Ravi Ichapurapu ,  Sameet Ramakrishnan ,  Marc Randall Whitten ,  Evan Fletcher Dougal ,  Michael Risley ,  Brian Fisher ,  Doyle Albert Martin

IPC: A63F13/335 ,  A63F13/45 ,  A63F13/44 ,  A63F13/358 ,  A63F13/42

Abstract: This disclosure describes, in part, techniques for controlling network applications. For instance, a remote system may send, over a network, data representing a state of an application to a display device, such as a television. The remote system may then receive, over the network, input data from a control device. The input data may represent one or more inputs received by the control device. Using the input data, the remote system may update the state of the application. The remote system may then send, to the display device, data representing the updated state of the application. In some instances, the remote system may further send, to the control device, audio data representing sound corresponding to the updated state of the application. The control device may synchronize outputting of the sound with the displaying the updated state of the application by the display device.

公开(公告)号：US11241616B1

公开(公告)日：2022-02-08

申请号：US16415224

申请日：2019-05-17

Applicant: Amazon Technologies, Inc.

Inventor： Ravi Ichapurapu ,  Sameet Ramakrishnan ,  Evan Fletcher Dougal ,  Brian Fisher ,  Junwu Luo ,  Sean Hajizadeh

IPC: A63F13/235 ,  A63F13/24 ,  G06F1/3287

Abstract: This disclosure describes, in part, techniques for conserving power on an electronic device. For instance, at given time intervals, the electronic device may be sending input data to a network device and receiving audio data from the network device. The electronic device may then use one or more techniques to determine when to switch from operating in a first mode, where the electronic device sends and/or receives the data, to operating in a second mode, where the electronic device ceases sending and/or receiving the data. For example, the electronic device may make the determination based on an amount of data stored in a buffer, whether the electronic device receives data, using data received from the network device, and/or the like. Based on the determination, the electronic device may switch to the second mode in order to conserve power.