Efficient use of trusted third parties for additional content-sharing security
First Claim
Patent Images
1. An apparatus for identifying network elements connected to an optical node comprising:
- a receiver configured to receive communications from a first network element at a first frequency f1 and a second network element at a second frequency f2 at the same time, the first frequency f1 and the second frequency f2 being selected so that f1+f2 produce a third frequency f3 which produces intermodulation disturbances in a transmitting laser;
a fast Fourier transform (FFT) module configured to identify the third frequency f3;
a power monitoring unit which is configured to measure the power in a signal; and
a microprocessor configured to determine that the first network element and the second network element are connected to the same optical node if the third frequency f3 is detected to have more power than a predetermined power spectral data threshold.
4 Assignments
0 Petitions
Accused Products
Abstract
Network elements are identified as being connected to optical nodes by instructing two network elements in a spectrum group of the CMTS to transmit at frequencies f1 and f2, respectively. Frequencies f1 and f2 are selected such that they produce intermodulation distortions (intermods) in the laser transmitter at f3 when combined. If intermods are produced which exceed a predetermined threshold, then the two network elements are determined to be on the same node. If the total power of the signal by the laser transmitter exceeds an impact threshold, then the test is stopped and new network elements are selected for testing.
-
Citations
14 Claims
-
1. An apparatus for identifying network elements connected to an optical node comprising:
-
a receiver configured to receive communications from a first network element at a first frequency f1 and a second network element at a second frequency f2 at the same time, the first frequency f1 and the second frequency f2 being selected so that f1+f2 produce a third frequency f3 which produces intermodulation disturbances in a transmitting laser; a fast Fourier transform (FFT) module configured to identify the third frequency f3; a power monitoring unit which is configured to measure the power in a signal; and a microprocessor configured to determine that the first network element and the second network element are connected to the same optical node if the third frequency f3 is detected to have more power than a predetermined power spectral data threshold. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method of identifying network elements connected to an optical node comprising:
-
sending instructions, by a transmitter, to a first network element to transmit at a first frequency f1 and a second network element at a second frequency f2 at the same time, the first frequency f1 and the second frequency f2 being selected so that f1+f2 produce a third frequency f3 which produces intermodulation disturbances in a transmitting laser; determining if the third frequency is produced at a power level greater than a predetermined power threshold, by a power monitoring unit; and determining that the first network element and the second network element are on the same node if the third frequency is produced at a power level greater than a predetermined power threshold, by a microprocessor. - View Dependent Claims (8, 9, 10)
-
-
11. A computer readable medium carrying instructions for a computer to perform a method of identifying network elements connected to an optical node comprising:
-
instructing a first network element to transmit at a first frequency f1 and a second network element at a second frequency f2 at the same time, the first frequency f1 and the second frequency f2 being selected so that f1+f2 produce a third frequency f3 which produces intermodulation disturbances in a transmitting laser; determining if the third frequency is produced at a power level greater than a predetermined power threshold; and determining that the first network element and the second network element are on the same node if the third frequency is produced at a power level greater than a predetermined power threshold. - View Dependent Claims (12, 13, 14)
-
Specification