Purdue Research Foundation

Samsung Electronics Co., Ltd.

Thomson Licensing

James Vincent Krogmeier

Saurabh Bagchi

Rajesh Krishna Panta

Ness B Shroff

Issa M I Khalil

Mark D Krasniewski

Sung Jin Kim

David James Love

Chandra Mohan

Michael D Zoltowski

Jung Hoon Suh

Zhiming Zhang

Obadamilola Aluko

Gregory John Tomezak

A protocol for optimizing the energy for code upload to sensors in a wireless sensor network and speeding up the dissemination if multiple sources of code are available. Energy optimization is achieved by equipping each node with limited non-local topology information, which it uses to determine the time when it can sleep since code is not being distributed in its vicinity. Another aspect of the invention is a protocol that facilitates secure upload of code in the wireless sensor network. The secure communication protocol divides the sensor field into control groups each with a control node, and manages data exchange between nodes within a control group through the mediation of a control head which provides the common key. The keys are refreshed periodically and the control nodes are changed periodically to enhance security. The protocol facilitates secure communication between sensor nodes despite the compromise of other nodes in the network.

Protocol for secure and energy-efficient reprogramming of wireless multi-hop sensor networks

A decoder adopted to receive a signal transmitted in a communication system, includes one or more of a module adopted to pre-process a received signal to reduce the effect of interference-plus-noise on the received signal before filtering the received signal, and a module adopted to post-process the result of filtering the received signal.

Perturbed decoder, perturbed decoding method and apparatus in communication system using the same

A protocol for optimizing the energy for code upload to sensors in a wireless sensor network and speeding up the dissemination if multiple sources of code are available. Energy optimization is achieved by equipping each node with limited non-local topology information, which it uses to determine the time when it can go to sleep since code is not being distributed in its vicinity. Another aspect of the invention is a protocol that facilitates secure upload of code in the wireless sensor network. The secure communication protocol divides the sensor field into control groups each with a control node, and manages data exchange between nodes within a control group through the mediation of a control head which provides the common key. The keys are refreshed periodically and the control nodes are changed periodically to enhance security. The protocol facilitates secure communication between sensor nodes despite the compromise of any number of other nodes in the network.

Variable Aperture Coded (VAC) signals for VAC modulation are advantageously generated by a digital signal processor () that yields a VAC signal having a single narrow peak in the positive frequency region. A Discrete-Time Hilbert transformer () isolates only the positive spectral peaks, thus yielding a VAC signal that affords greater control over zero crossings.

DSP-based variable aperture code generation technique

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West Lafayette, IN, United States of America

James Vincent Krogmeier