Blackberry Corporation

Research in Motion Corporation

Shouxing Qu

Yan Xin

Huan Wu

Arnold Sheynman

Yu Gao

Zhijun Cai

Yongkang Jia

Gaëlle Christine Martin-Cocher

Jesse William Bennett

James Earl Womack

Daniel Noel Badiere

Farzaneh Kohandani

Michael Peter Montemurro

Michael Eoin Buckley

Johanna Lisa Dwyer

Werner Karl Kreuzer

Scott Leonard Dill

Mahendra Fuleshwar Prasad

Jason Wayne Jantzi

Sameh Ayoub

Suresh Periyalwar

Dake He

Stephen John McCann

Sean Bartholomew Simmons

Cortez M Corley

Eswar Kalyan Vutukuri

Paul Marcus Carpenter

Alexander Levato

Christopher Andrew DeVries

Stephen Mccann

Christopher Devries

Alexander Karl Levato

Mahendra Fuleswar Prasad

Youngkang Jia

A method at a sensor apparatus, the method including calculating a value for a target function based on at least one sensor of the sensor apparatus; determining that the value of the target function is within a defined threshold range for a defined time period, thereby finding an in-flight state for the sensor apparatus; and turning off transmission from a radio of the sensor apparatus based on the in-flight state.

Method and system for moving status detection for a sensor apparatus

A method at a sensor apparatus affixed to a transportation asset, the method including detecting a trigger at the sensor apparatus; taking a threshold number of samples of a displacement-related value of the transportation asset over time; determining that a variance of the threshold number of samples exceeds a threshold; analyzing a frequency property based on the threshold number of samples; and based on the frequency property, determining whether the transportation asset is loaded or unloaded.

Method and system for cargo loading detection

A method at a computing device, the method including obtaining sensor data for a vehicle providing vibration frequency and magnitude; calculating an energy for each of a low frequency passband and a high frequency passband of a bandpass filter pair; finding an energy ratio based on the energy for the low frequency passband and the energy for the high frequency passband; applying weighting constants to each of the energy for the low frequency passband, the energy for the high frequency passband and the energy ratio to calculate a decision variable; and finding that the vehicle is unloaded if the decision variable is below a threshold and finding that the vehicle is loaded if the decision variable is above a threshold.

Method and system for shipping container loading and unloading estimation

A method at a computing device, the method including obtaining sensor data for a vehicle providing one or both of displacement or acceleration information for the vehicle; calculating a vibration frequency for the vehicle; retrieving calibration data for the vehicle, the calibration data comprising at least a first known mass; a second known mass; a vibration frequency for the vehicle at the first known mass; and a vibration frequency of the vehicle at a second known mass; and using the calibration data and the vibration frequency for the vehicle, calculating a load estimation for the vehicle.

Method and system for shipping container load estimation

A method and system for determining the weight of a load when the load is placed on a chassis supported by a spring suspension. The method comprises measuring a first distance to a position fixed relative the ground by at least one sensor mounted on the chassis; detecting a displacement of the chassis relative to the position based on the first distance and a second distance measured to the position by the at least one sensor; determining the weight of the load on the basis of the chassis displacement; and communicating the determined weight of the load. The system comprises at least one sensor mounted on the chassis for measuring a first distance to a position fixed relative to the ground; a module for detecting a displacement of the chassis relative to the position based on the first distance and a second distance measured to the position by the at least one sensor, the module determining the weight of the load on the basis of the chassis displacement; and a communication module for communicating the determined weight of the load.

Method and system for determining the weight of a load on a chassis

In some examples, a binary bit stream of input bits is encoded into a three-amplitude bipolar symbol stream of symbols, the encoding using a coding rule that specifies setting a value of a respective symbol of the symbol stream based on a respective input bit of the binary bit stream and a prior input bit of the binary bit stream that is prior to the respective input bit, the coding rule further specifying that adjacent non-zero pulses keep the same polarity. A radio frequency (RF) carrier signal is modulated using the symbol stream to produce a modulated RF signal.

Modulation for a data bit stream

In some examples, an apparatus includes a transmitter configured to apply input data as a frequency-domain data sequence to modulate a set of subcarriers, and separate the frequency-domain data sequence into a first subsequence of elements and a second subsequence of elements. A first conjugate symmetric subsequence that is based on inserting a zero value into the first subsequence is formed, and a second conjugate symmetric subsequence that is based on inserting a zero value into the second subsequence is formed, where the zero values are inserted at different positions in the first and second subsequences. A time-domain sequence comprising a first component that is a function of the first conjugate symmetric subsequence, and a second component that is a function of the second conjugate symmetric subsequence is generated.

Communication with I-Q decoupled OFDM modulation

A method and apparatus for orthogonal frequency division multiplexing (OFDM) modulation includes separating a frequency-domain sequence of complex numbers into a first portion and a second portion that is disjoint with the first portion, each of the first portion and the second portion including a respective half of the complex numbers of the frequency-domain sequence, and generating a time-domain sequence having a real in-phase component that is a function of the first portion only, and an imaginary quadrature-phase component that is a function of the second portion only.

Method and apparatus for I-Q decoupled OFDM modulation and demodulation

A method in a network access equipment is provided. The method includes defining a burst duration for sending a plurality of reference signals. The method further includes determining an interval between ones of the plurality of reference signals in the burst duration. The method further includes defining a burst period for sending a plurality of reference signal bursts. The method further includes sending a reference signal instruction message containing an activation message and at least one of the burst duration, the interval, and the burst period.

System and method for defining a burst period

Embodiments are directed to providing communication between a first device and a second device by: iterating, by the first device, over a number of transmitter antenna polarization types in the first device, constructing, by the first device, a number of data units based on each of the transmitter antenna polarization types, transmitting, by the first device, each of the data units for each of a number of receiver antenna polarization types in the second device, receiving, by the first device, an indication of a transmitter antenna polarization type in the first device included in the number of transmitter antenna polarization types in the first device, and transmitting, by the first device, data using the indicated transmitter antenna polarization type.

Antenna polarization optimization for wireless communications

The present disclosure relates generally to systems and methods for timing synchronization. Uplink synchronization is a necessary component of a UE operating in a mobile, wireless network. Reliable uplink synchronization generally requires regular uplink transmission containing reference signals. A method is provided that defines a burst period for sending the reference signals, determines an interval between the reference signals, and sends a timing instruction message that includes the burst period and the determined interval. A second method is provided that receives the timing instruction message and sends the reference signals in accordance with the timing instruction.

System and method for timing synchronization

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Ottawa, Canada

Shouxing Qu