Carnegie Mellon University

Polaris Wireless, Inc.

Robert Iannucci

Rodrigo Gregorio Alonso

Anthony Rowe

Swarun Kumar

Artur Balanuta

Akshay Gadre

Ahmed Mohamed Ahmadein

Adwait Dongare

Anh Luong

Revathy Narayanan

A method of providing wireless communications in a wireless network can include wirelessly receiving a chirp spread-spectrum modulated signal at a first gateway device, the chirp spread-spectrum modulated signal being transmitted by a remote client device. The chirp spread-spectrum modulated signal can be demodulated at the first gateway device to provide demodulated data at the first gateway device. The demodulated data can be processed to provide an indication that a decode of a packet including the demodulated data failed. Time adjacent chirps included in the demodulated data can be combined to provide combined data at the first gateway device. A message can be transmitted from the first gateway device to a remote server responsive to an amplitude of the combined data exceeding a threshold value and the indication that the decode of the packet including the demodulated data failed.

Methods, systems, and articles of manufacture for joint decoding of packets in wireless networks using chirp spread-spectrum modulation

An apparatus and method for tracking a large number of wireless terminals being used by wireless subscribers and for estimating the location of the terminals at each instant. Some embodiments of the present invention use a combination of cluster analysis, interpolation of information between identified clusters, and averaging of the interpolated information, in order to predict when it might be beneficial to issue a location request to a location engine, for each subscriber.

Tracking large numbers of wireless terminals based on predicting when to issue location requests

An apparatus and method for tracking a large number of wireless terminals being used by wireless subscribers in a wireless network and for estimating the location of the terminals at each instant. Some embodiments of the present invention use a coordinated smoothing over time of when location requests should be issued to a location engine, for the large number of subscribers. The smoothing can be used in conjunction with a throttling of location requests, such as when the maximum rate of location request transactions that is supported by the wireless network is exceeded.

Tracking large numbers of wireless terminals while regulating location requests

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Palo Alto, CA, United States of America

Robert Iannucci