Method and apparatus for exchanging RF signatures between cellular telephone systems
First Claim
Patent Images
1. A method of preventing fraud in mobile telephone systems, comprising the steps of:
- receiving a call attempt by a roaming mobile phone;
generating a radio frequency (RF) signature for the roamning mobile phone;
transmitting the RF signature for the roaming mobile phone to a fraud control system in a home service area for the roaming mobile phone;
receiving a response from the fraud control system in the home service area for the roaming mobile phone; and
processing the response to make an appropriate decision on the call attempt by the roaming mobile phone.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for reducing roaming fraud in mobile phone systems includes the exchange of an RF signature of a roaming mobile phone between the foreign and home service areas. Thereafter, the analysis of the RF signature can be performed either at the foreign or home service area.
264 Citations
46 Claims
-
1. A method of preventing fraud in mobile telephone systems, comprising the steps of:
-
receiving a call attempt by a roaming mobile phone; generating a radio frequency (RF) signature for the roamning mobile phone; transmitting the RF signature for the roaming mobile phone to a fraud control system in a home service area for the roaming mobile phone; receiving a response from the fraud control system in the home service area for the roaming mobile phone; and processing the response to make an appropriate decision on the call attempt by the roaming mobile phone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method of preventing fraud in mobile telephone systems, comprising the steps of:
-
receiving a request for authentication at a home service area for a radio frequency (RF) signature of a roaming mobile phone from a fraud control system in a foreign service area; analyzing the RF signature for the roaming mobile phone using RF signatures stored in a data storage device; and returning a response to the request for authentication. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. A system for preventing fraud in mobile telephone systems, comprising:
-
a transceiver for receiving a call attempt by a roaming mobile phone; means for generating a radio frequency (RF) signature for the roaming mobile phone; means for transmitting the RF signature for the roaming mobile phone to a fraud control system in a home service area for the roaming mobile phone and for receiving a response from the fraud control system in the home service area for the roaming mobile phone; and a processor for processing the response to make an appropriate decision on the call attempt by the roaming mobile phone. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
-
-
36. A system for preventing fraud in mobile telephone systems, comprising the steps of:
-
a transceiver for receiving a request for authentication at a home service area for a radio frequency (RF) signature of a roaming mobile phone from a fraud control system in a foreign service area; an analyzer for analyzing the RF signature for the roaming mobile phone using RF signatures stored in a data storage device; and means for returning a response to the request for authentication. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
-
Specification