Bbn Technologies Corporation

W Timothy Strayer

Craig Partridge

David Bruce Cousins

Tushar Saxena

Rajesh Krishnan

A system acquires information about communication among wired or wireless nodes [] in a network [] by intercepting chunks of data in the network by a wired or wireless tap [] located among the wired or wireless nodes [] in the network. Characteristic information [] about the intercepted chunks of data may be obtained. The characteristic information may include times of arrival [] of the chunks of data at the wired or wireless tap [] and identifiers of wired or wireless source nodes [] that sent the chunks of data. At least one signal may be constructed to represent the characteristic information over time.

Encoding of signals to facilitate traffic analysis

A system processes communication signals in a network [100, 200]. The system may obtain time of arrival information for chunks of data in the network and construct a signal [410, 420] to represent the time of arrival information. The signal may consist of data that is non-uniformly spaced. The system may process the signal using a Lomb technique to obtain periodicity information [600, 800] about the signal.

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West Newton, MA, United States of America

W Timothy Strayer