Cognitive Systems Corp.

Sirific Wireless Corporation

Blackberry Corporation

Icera Canada Ulc

Tag-comm Inc.

Drnc Holdings, Inc.

Pravala Inc.

The University of Waterloo

Icera, Inc.

Nortel Networks Corporation

Research in Motion Corporation

Nvidia Technology UK Limited

Wilmerding Communications LLC

Tajinder Manku

Oleksiy Kravets

Mohammad Omer

Abdellatif Bellaouar

Stephen Arnold Devison

Christopher Beg

Gareth Pryce Weale

Dustin Griesdorf

Christopher Vytautas Olekas

Yunfeng Piao

Christopher Eugene Snyder

Volodymyr Yavorskyy

Lawrence Wong

Yang Ling

Chris Snyder

Karanvir Chattha

Stanley Ituah

William Kung

Zohaib Moti

Yong Lu

Khurram Muhammad

Masoud Kahrizi

See Taur Lee

Liviu George

Sher Jiun Fang

Alan R Holden

Sherif H K Embabi

Semyon Lebedev

Simon Andrew Hughes

Arokia Nathan

Michael C Maliepaard

Christopher Robert Little

James Wei

Javad Khajehpour

Sathwant Dosanjh

Hamid R Safiri

Bish Ray

Hugh Robert Faulkner Hind

Trevor Pace

Eyad Abou-Allam

Rahul Singh

Hugh Robert Hind

Sherif HK Embabi

Michel JGJP Frechette

In a general aspect, motion is detected using wireless signals. In an example, a method includes receiving, at a wireless communication device, requests for the wireless communication device to transmit wireless signals, the requests initiated by a wireless sensing system. The method further includes transmitting a series of wireless signals from the wireless communication device in response to the requests, and detecting, at the wireless communication device, a trigger event after transmitting the series of wireless signals. The method additionally includes updating, by the wireless communication device, a state of the wireless communication device based on the trigger event, the updated state indicating that the wireless communication device is not enabled to transmit wireless signals in response to the requests from the wireless sensing system. The method also includes communicating, by the wireless communication device, the updated state of the wireless communication device to the wireless sensing system.

Controlling device participation in wireless sensing systems

In a general aspect of the examples described, motion is detected based on bi-directional channel sounding. In an example, a first set of channel information is obtained from a first device. The first set of channel information is based on a first set of wireless signals transmitted from a second device through a space at a first time in a timeframe. A second set of channel information is obtained from the second device. The second set of channel information is based on a second set of wireless signals transmitted from the first device through the space at a second time in the timeframe. The first and second sets of channel information are analyzed to detect a category of motion or a location of detected motion in the space during the timeframe.

Motion detection and localization based on bi-directional channel sounding

In a general aspect, motion is detected using wireless signals. In an example, in response to a first series of sampling instructions asserted at a first sampling rate in a wireless sensing system, a first series of requests is sent for a wireless communication device to transmit a first series of wireless signals. The first series of wireless signals is received and motion detection output data is obtained based on the first series of wireless signals. A rate at which sampling instructions are asserted is changed from the first sampling rate to a second, different sampling rate based on the motion detection output data. In response to a second series of sampling instructions asserted at the second sampling rate in the wireless sensing system, a second series of requests is sent for the wireless communication device to transmit a second series of wireless signals.

Controlling measurement rates in wireless sensing systems

In a general aspect, motion is detected using wireless signals. In an example, a method includes receiving first motion detection output data representing a degree of motion detected by a wireless sensing system based on wireless signals exchanged in a wireless communication network. The wireless communication network includes a first access point device and a first client device communicatively coupled by a first wireless communication link. The method also includes receiving network information indicative of a network topology of the wireless communication network, and generating a first control signal configured to change a characteristic of the first wireless communication link based on the first motion detection output data and network information. The method further includes receiving second motion detection output data representing a degree of motion detected by the wireless sensing system after the characteristic of the first wireless communication link has changed in response to the first control signal.

Controlling wireless connections in wireless sensing systems

In a general aspect, motion is detected using wireless signals. In one example, a wireless standard protocol message is transmitted by a wireless communication device through a space to one or more neighbor devices. A corresponding wireless standard protocol response including beamforming information feedback is received from each of the one or more neighbor devices in response to the wireless standard protocol message. Motion of an object in the space is detected based on the beamforming information feedback from each of the neighbor devices.

Motion detection based on beamforming dynamic information from wireless standard client devices

In a general aspect, motion is detected using wireless signals. In one example, a wireless signal transmitted through a space from a first wireless communication device is received at a second wireless communication device. Dynamic beamforming information is based on the wireless signal. The second wireless communication device uses the dynamic beamforming information to detect motion in the space, or transmits the dynamic beamforming information to the first wireless communication device for use in detecting motion in the space.

Motion detection by a central controller using beamforming dynamic information

In a general aspect, a sensitivity setting is adjusted in a motion detection system. In some aspects, a user interface is provided by a motion detection system, and user input data is obtained through the user interface. A wireless communication link is identified based on the user input data; the wireless communication link is provided by a first wireless communication device and a second wireless communication device. Based on the user input data, a value is assigned to a sensitivity setting associated with the wireless communication link in the motion detection system. The motion detection system obtains data for motion detection based on wireless signals communicated through a space on the wireless communication link. Motion of an object in the space is detected based on the data and the value of the sensitivity setting.

Modifying sensitivity settings in a motion detection system

A transmission apparatus for a wireless device, comprising: an antenna for receiving an original signal and for backscattering a modulated signal containing information from the wireless device; a variable impedance coupled to the antenna, the variable impedance having an impedance value; a delta-sigma modulator coupled to the variable impedance for modulating the impedance value, and thereby a backscattering coefficient for the antenna, in accordance with the information to generate the modulated signal; and, a decoder coupled to the delta-sigma modulator for generating the impedance value from the information.

Transmission apparatus for a wireless device using delta-sigma modulation

In a general aspect of the examples described, motion is detected based on received wireless signals in a mesh network. In an example, transfer function components for each pair of devices are obtained. A time series of transfer function matrices is generated, with each of the transfer function matrices comprising a respective subset of the transfer function components. Motion of an object in the space is detected based on the time series of transfer function matrices.

Motion detection in mesh networks

In a general aspect, a motion detection channel is operated in a wireless communication network. In some aspects, a first wireless network device communicates wireless network traffic on a first subset of wireless communication channels in a wireless communication network. The first wireless network device receives motion detection signals transmitted through a space by a second wireless network device. The motion detection signals are received on a second subset of wireless communication channels. The motion detection signals are processed to detect motion of an object in the space.

Operating a motion detection channel in a wireless communication network

In a general aspect, a wireless communication channel is selected based on signal quality metrics. In some aspects, a first wireless communication device receives a first set of signals based on wireless signals transmitted through a space on a set of wireless communication channels from a second wireless communication device. A signal quality metric value is computed for each wireless communication channel based on the first set of signals, and one of the wireless communication channels is selected based on a comparison of the signal quality metric values for the respective wireless communication channels. The first wireless communication device receives a second set of signals based on wireless signals transmitted through the space on the selected wireless communication channel from the second wireless communication device, and a motion detection process is executed to detect motion of an object in the space based on the second set of signals.

Selecting wireless communication channels based on signal quality metrics

In a general aspect, a wireless communication channel is selected based on signal quality metrics. In some aspects, a first wireless communication device receives a first set of signals based on wireless signals transmitted through a space on a first wireless communication channel from a second wireless communication device. A signal quality metric value is computed based on the first set of signals, and a second wireless communication channel is selected based on a determination that the value of the signal quality metric does not meet a quality criterion for a motion detection process. The first wireless communication device receives a second set of signals based on wireless signals transmitted through the space on the second wireless communication channel from the second wireless communication device, and the motion detection process is executed to detect motion of an object in the space based on the second set of signals.

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Tajinder Manku