Waveform collection for use in wireless telephone identification
First Claim
1. A method of collecting a reference waveform from an authorized wireless telephone in a wireless telephone system including a fingerprint analyzer that identifies an unauthenticated wireless telephone as authorized or fraudulent based on a fingerprint analysis by comparing a transmission characteristic of the unauthenticated wireless telephone with a stored fingerprint of a corresponding authorized wireless telephone, the method comprising the steps of:
- (a) selecting a first destination to be called by the authorized wireless telephone;
(b) associating the selected destination to be called by the authorized wireless telephone with a first identification of the authorized wireless telephone;
(c) receiving from a wireless telephone a transmission signal containing a transmitted destination and a transmitted identification of the wireless telephone transmitting the transmission signal;
(d) determining whether the transmitted destination and the transmitted identification of the transmitting wireless telephone respectively correspond to the selected first destination and the associated first identification of the authorized wireless telephone; and
(e) if the transmitted destination and the transmitted identification of the transmitting wireless telephone are determined to respectively correspond to the selected first destination and the associated first identification of the authorized wireless telephone, performing the following steps;
extracting from the transmission signal a reference waveform indicative of a transmission characteristic of the transmitting wireless telephone; and
storing the extracted reference waveform as a reference waveform of the authorized wireless telephone for subsequent use by the fingerprint analyzer.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method for collecting reference waveforms from authorized wireless telephones in a wireless telephone network. The collected reference waveforms are used by a fingerprint analyzer to distinguish telephone calls made by the authorized wireless telephone from telephone calls made by an unauthorized wireless telephone. The system maintains a pool of specially designated unassigned telephone numbers and selects one telephone number from the pool at random which is provided to a valid subscriber of an authorized wireless telephone. The randomly selected telephone number is to be called by the valid subscriber using the authorized cellular telephone for the purpose of collecting reference waveforms by the system. A radio frequency (RF) receiver of the system monitors and receives transmission signals from a plurality of wireless telephones. Each transmission signal contains a destination telephone number and an identification of its wireless telephone such as MIN/ESN identifiers. The system selects for purposes of collecting reference waveforms the transmission signal whose destination and wireless telephone identification respectively correspond to the randomly selected destination and the identification of the authorized wireless telephone. This ensures that that particular transmission signal belongs to the authorized wireless telephone of the valid subscriber rather than an unauthorized wireless telephone belonging to a pirate since the pirate has no way of knowing the randomly selected telephone number provided to the valid subscriber. The processor then extracts the reference waveform that represents a transmission characteristic of the authorized wireless telephone and stores the extracted reference waveform in memory for use by the fingerprint analyzer.
-
Citations
48 Claims
-
1. A method of collecting a reference waveform from an authorized wireless telephone in a wireless telephone system including a fingerprint analyzer that identifies an unauthenticated wireless telephone as authorized or fraudulent based on a fingerprint analysis by comparing a transmission characteristic of the unauthenticated wireless telephone with a stored fingerprint of a corresponding authorized wireless telephone, the method comprising the steps of:
-
(a) selecting a first destination to be called by the authorized wireless telephone; (b) associating the selected destination to be called by the authorized wireless telephone with a first identification of the authorized wireless telephone; (c) receiving from a wireless telephone a transmission signal containing a transmitted destination and a transmitted identification of the wireless telephone transmitting the transmission signal; (d) determining whether the transmitted destination and the transmitted identification of the transmitting wireless telephone respectively correspond to the selected first destination and the associated first identification of the authorized wireless telephone; and (e) if the transmitted destination and the transmitted identification of the transmitting wireless telephone are determined to respectively correspond to the selected first destination and the associated first identification of the authorized wireless telephone, performing the following steps; extracting from the transmission signal a reference waveform indicative of a transmission characteristic of the transmitting wireless telephone; and storing the extracted reference waveform as a reference waveform of the authorized wireless telephone for subsequent use by the fingerprint analyzer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method of collecting a reference waveform from an authorized wireless telephone to be subsequently used by a fingerprint analyzer to distinguish telephone calls made by the authorized wireless telephone from telephone calls made by an unauthorized wireless telephone, the method comprising the steps of:
-
(a) selecting a destination to be called by the authorized wireless telephone; (b) associating the selected destination to be called by the authorized wireless telephone with an identification of the authorized wireless telephone; (c) monitoring transmission signals from a plurality of wireless telephones, each transmission signal containing a destination and an identification of the wireless telephone transmitting the transmission signal; (d) identifying a transmission signal among the monitored transmission signals whose destination and identification contained therein respectively correspond to the selected destination and the associated identification of the authorized wireless telephone; (e) obtaining a reference waveform from the wireless telephone transmitting the identified transmission signal; and (f) storing the obtained reference waveform as a reference waveform of the authorized wireless telephone for subsequent use by the fingerprint analyzer. - View Dependent Claims (13, 14, 15, 16, 17, 19, 20, 21, 22)
-
-
18. A method of collecting a reference waveform from an authorized wireless telephone to be subsequently used by a fingerprint analyzer to distinguish telephone calls made by the authorized wireless telephone from telephone calls made by an unauthorized wireless telephone, the method comprising the steps of:
-
(a) selecting a destination to be called by a valid user using the authorized wireless telephone; (b) associating the selected destination with an identification of the authorized wireless telephone; (c) providing the selected destination to the valid user of the authorized wireless telephone; (d) monitoring transmission signals from a plurality of wireless telephones, each transmission signal containing a destination and an identification of a wireless telephone; (e) identifying among the monitored transmission signals a transmission signal whose destination and identification contained therein respectively correspond to the selected destination and the associated identification of the authorized wireless telephone; (f) obtaining, from the wireless telephone transmitting the identified transmission signal, a reference waveform indicative of a transmission characteristic of the wireless telephone transmitting the identified transmission signal; and (g) storing the obtained reference waveform as a reference waveform of the authorized wireless telephone for subsequent use by the fingerprint analyzer. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
-
-
30. A system for collecting a reference waveform from an authorized wireless telephone to be subsequently used by a fingerprint analyzer to distinguish telephone calls made by the authorized wireless telephone from telephone calls made by an unauthorized wireless telephone, wherein a user of the authorized wireless telephone is provided with a destination to be called using the authorized wireless telephone, the system comprising:
-
a radio frequency (RF) receiver operable to receive transmission signals from a plurality of wireless telephones, each transmission signal containing a destination and an identification of a wireless telephone; a processor connected to the RF receiver, the processor operable to monitor transmission signals received by the RF receiver and select a transmission signal among the monitored transmission signals whose destination and identification contained therein respectively correspond to the provided destination and the identification of the authorized wireless telephone, and obtain a reference waveform from the wireless telephone transmitting the selected transmission signal, the obtained reference waveform being indicative of a transmission characteristic of the wireless telephone transmitting the selected transmission signal; and a memory connected to the processor and operable to store the obtained reference waveform as a reference waveform of the authorized wireless telephone for subsequent use by the fingerprint analyzer. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38)
-
-
39. A system for collecting a reference waveform from an authorized wireless telephone to be subsequently used to distinguish telephone calls made by the authorized wireless telephone from telephone calls made by an unauthorized wireless telephone, wherein a user of the authorized wireless telephone is provided with a destination to be called using the authorized wireless telephone, the system comprising:
-
a radio frequency (RF) receiver operable to receive transmission signals from a plurality of wireless telephones, each transmission signal containing a destination and an identification of a wireless telephone; a processor connected to the RF receiver, the processor operable to select a wireless telephone transmitting a transmission signal whose destination and identification contained therein respectively correspond to the provided destination and the identification of the authorized wireless telephone, and obtain a reference waveform from the selected wireless telephone, the obtained reference waveform being indicative of a transmission characteristic of the selected wireless telephone; and a memory connected to the processor and operable to store the obtained reference waveform. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48)
-
Specification