PHYSICALLY SECURE DIGITAL SIGNAL PROCESSING FOR BLIND DIFFERENTIALLY-SPREAD WIRELESS M2M NETWORKS
First Claim
1. A method for physically secure digital signal processing for wireless M2M networks, said networks comprising at least one set of transceivers comprising at least one Signaling Machine (‘
- SM’
) and one Data Aggregation Point (‘
DAP’
) with each SM and DAP comprising at least one antenna and one transceiver for exchanging wireless transmissions, said method comprising;
employing transmission information that is randomly determined at every node in the network, and neither known to the receivers in the network nor provisioned by the network;
incorporating into each transmission at each transceiver directly spread differentiation using any baseband modulation format to effect a differentiator;
applying a timing advance to an intended uplink receiver;
then fitting each transmission into a series of frames of Upload Transmissions (‘
UpLink’
) and Download Transmissions (‘
DownLink’
);
transmitting from the SM on any UpLink;
transmitting from the DAP on any DownLink;
despreading, at the intended uplink receiver for that transmission, the received signal.
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Accused Products
Abstract
A method and apparatus for physically secure communication over machine-to-machine (M2M) networks is claimed, through the use of frequency-hop and random access spread spectrum modulation formats employing using truly random spreading codes and time/frequency hopping and receiver selection strategies at the transmitters in the M2M network, blind signal detection and linear signal separation techniques at the receivers in the M2M network, completely eliminating the ability for an adversary to predict and override M2M transmissions. Additional physical security protocols are also introduced that allow the network to easily detect and identify spoofing transmissions on uplinks and downlinks, and to automatically excise those transmissions as part of the despreading procedure, even if those transmissions are received at a much higher power level than the intended transmissions. Extensions to weakly and strongly macrodiverse networks are also described, which provide additional efficiency and security improvements by exploiting the route diversity of the network.
2 Citations
4 Claims
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1. A method for physically secure digital signal processing for wireless M2M networks, said networks comprising at least one set of transceivers comprising at least one Signaling Machine (‘
- SM’
) and one Data Aggregation Point (‘
DAP’
) with each SM and DAP comprising at least one antenna and one transceiver for exchanging wireless transmissions, said method comprising;employing transmission information that is randomly determined at every node in the network, and neither known to the receivers in the network nor provisioned by the network; incorporating into each transmission at each transceiver directly spread differentiation using any baseband modulation format to effect a differentiator; applying a timing advance to an intended uplink receiver; then fitting each transmission into a series of frames of Upload Transmissions (‘
UpLink’
) and Download Transmissions (‘
DownLink’
);transmitting from the SM on any UpLink; transmitting from the DAP on any DownLink; despreading, at the intended uplink receiver for that transmission, the received signal. - View Dependent Claims (2, 3, 4)
- SM’
Specification
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- Resources
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Current AssigneeBrian G. Agee
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Original AssigneeBrian G. Agee
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InventorsAgee, Brian G.
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current1/1
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CPC Class CodesH04B 1/692 Hybrid techniques using com...H04B 1/7103 the interference being mult...H04B 1/7156 Arrangements for sequence s...H04B 2001/7154 with means for preventing i...H04J 13/0007 Code typeH04W 4/70 Services for machine-to-mac...
