IDENTIFICATION SYSTEM
First Claim
1. A method of identifying a transmitter communicating data to a receiver, the method including providing the transmitter with a counter and data to be communicated;
- periodically adjusting a count of the counter;
generating modified data by modifying the data dependent upon the count; and
transmitting the modified data to the receiver.
3 Assignments
0 Petitions
Accused Products
Abstract
A method of communicating data from a transmitter 12 to receiver 26 is provided. The method includes providing the transmitter 12 with a counter 16 and data to be communicated, and periodically adjusting a count of the counter 16 to generate modified data which is then transmitted. Typically, the count is incremented each time a signal is transmitted by the transmitter 12 which is typically in the form of an electronic tag. The invention thus extends to a transmitter 12 which includes storage means 14 for storing unique identification data for identifying the tag, and a counter 16 having a current count which is periodically adjusted in use. Further, the invention extends to a monitoring system 10 which includes a plurality of transmitters 12 as herein before described and a receiver 26 including analysis means 30 for analysing the transmitted signal 15.
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Citations
28 Claims
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1. A method of identifying a transmitter communicating data to a receiver, the method including
providing the transmitter with a counter and data to be communicated; -
periodically adjusting a count of the counter;
generating modified data by modifying the data dependent upon the count; and
transmitting the modified data to the receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An identification system, which includes
a plurality of transmitters, each transmitter including unique identification data for identifying the transmitter and a counter having a count which is periodically adjusted, the unique identification data being operatively modified by the count to generate modified data included in a transmitted signal; - and
a receiver including analysis means for analysing the transmitted signal, the analysis means being operable to extract the count and the unique identification data from the transmitted signal thereby to identify the transmitter. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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19. A transmitter which includes storage means for storing unique identification data for identifying the transmitter;
- and a counter having a current count which is periodically adjusted in use, the unique identification data being modified dependent upon current count to generate modified data included in its transmitted signal.
Specification