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 machine-to-machine (‘
- 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;
generating transmission information that is;
randomly varied at every transmitter in the network; and
,neither known to any receiver in, nor provisioned by, the network;
using that transmission information to directly spread a signal with any baseband modulation format, thereby implementing differentiation between transmitters in the network by any of a spreading code and baseband signal samples;
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 any of, the SM on an UpLink and the DAP on a Downlink; and
,despreading, at an intended receiver for that transmission, the received signal.
0 Assignments
0 Petitions
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.
45 Citations
12 Claims
-
1. A method for physically secure digital signal processing for wireless machine-to-machine (‘
- 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;generating transmission information that is; randomly varied at every transmitter in the network; and
,neither known to any receiver in, nor provisioned by, the network; using that transmission information to directly spread a signal with any baseband modulation format, thereby implementing differentiation between transmitters in the network by any of a spreading code and baseband signal samples; 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 any of, the SM on an UpLink and the DAP on a Downlink; and
,despreading, at an intended receiver for that transmission, the received signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- M2M)’
Specification