Patent ID: 8391375

Claim:
A method of communicating information from a wireless autonomous device to a base station, said wireless autonomous device having a stored data element having the form of a predetermined profile, said predetermined profile having a total number of possible data element combinations, said possible data element combinations having a sequence, said stored data element being one of said possible data element combinations and being a particular number in the sequence, the method comprising: receiving at said wireless autonomous device RF energy in the form of an RF transmitting profile transmitted by said base station, said RF transmitting profile including a triggering portion comprising a plurality of pulses, the number of said pulses being at least equal to said total number of possible data element combinations; keeping a count of received pulses at said wireless autonomous device by counting each of said pulses when said pulses are received by said wireless autonomous device; wirelessly transmitting a piece of data to said base station from said wireless autonomous device when said count of received pulses reaches a value equal to said particular number in the sequence; receiving said piece of data at said base station; and using the receipt of said piece of data at said base station to determine which of said possible data element combinations said stored data element is.