System and method of detecting and preventing fraudulent telephone calls in a radio telecommunications network

A method of detecting a fraudulent call origination in a radio telecommunications network having a subscriber's home Home Location Register (HLR) for storing a stored location for a mobile station, and a plurality of Mobile Switching Centers (MSCs) including a serving (MSC) in which said call origination is initiated, and a MSC-Location (MSC-L) covering the location for the mobile station stored in said subscriber's home HLR, said method comprising the steps of:

• sending a reporting message from said serving MSC to said home HLR when a call is originated from said mobile station in said serving MSC, said reporting message indicating a reported location for said mobile station and including a called telephone number;
• comparing said stored location to said reported location;
• sending a paging request message from said home HLR to said MSC-L requesting said MSC-L to page said mobile station in said stored location when said stored location is different from said reported location;
• paging said mobile station in said stored location;
• sending a paging result from said MSC-L to said home HLR;
• sending a paging request message from said home HLR to said serving MSC requesting said serving MSC to page said mobile station in said reported location;
• paging said mobile station in said reported location;
• sending a paging result from said serving MSC to said home HLR;
• and
• analyzing said stored location and said reported location, and said paging results from said serving MSC and said MSC-L to determine whether said call origination is fraudulent.

A method of detecting a fraudulent call origination in a radio telecommunications network having a subscriber's home Home Location Register (HLR) for storing a stored location for a mobile station, and a serving Mobile Switching Center (MSC) in which said call origination is initiated, said method comprising the steps of:

• sending a reporting message from said serving MSC to said home HLR when a call is originated from said mobile station in said serving MSC, said reporting message indicating a reported location for said mobile station and including a called telephone number;
• comparing said stored location to said reported location;
• sending a paging request message from said home HLR to said serving MSC requesting said serving MSC to page said mobile station in said stored location when said stored location is identical to said reported location;
• paging said mobile station in said stored location;
• sending a paging result from said serving MSC to said home HLR;
• and
• analyzing said stored location and said reported location, and said paging result from said serving MSC to determine whether said call origination is fraudulent.

A system for detecting a fraudulent call origination in a radio telecommunications network having a subscriber's home Home Location Register (HLR) for storing an activity status indication for the subscriber's mobile station, and a serving Mobile Switching Center (MSC) in which said call origination is initiated, said system comprising:

• a reporting means for sending a reporting message from said serving MSC to said home HLR when a call is originated from said mobile station in said serving MSC;
• means within said home HLR for determining whether said stored activity status indication is busy;
• and
• means within said home HLR for determining that said call origination is fraudulent upon determining that said stored activity status indication is busy.

A system for detecting a fraudulent call origination from a mobile station in a radio telecommunications network having a plurality of Mobile Switching Centers (MSCs) and a subscriber's home Home Location Register (HLR) which stores a stored location for said mobile station, said system comprising:

• a serving Mobile Switching Center (MSC) in which said call origination is initiated, said serving MSC including:
• means for sending a reporting message from said serving MSC to said home HLR when a call is originated from said mobile station in said serving MSC, said reporting message indicating a reported location for said mobile station;
• and
• means for sending a paging result from said serving MSC to said home HLR;
• means within said home HLR for comparing said stored location to said reported location;
• a MSC-Location (MSC-L) providing radio coverage for the location for the mobile station stored in said home HLR, said MSC-L including:
• means for paging said mobile station in said stored location;
• and
• means for sending a paging result from said MSC-L to said home HLR;
• means within said home HLR for sending a paging request message to said MSC-L to page said mobile station in said stored location;
• means within said home HLR for sending a paging request message to said serving MSC to page said mobile station in said reported location;
• and
• means within said home HLR for analyzing said stored location and said reported location, and said paging results from said MSC-L and said serving MSC to determine whether said call origination is fraudulent.

A system for detecting a fraudulent call origination from a mobile station in a radio telecommunications network having a plurality of Mobile Switching Centers (MSCs) and a subscriber's home Home Location Register (HLR) which stores a stored location for said mobile station, said system comprising:

• a serving Mobile Switching Center (MSC) in which said call origination is initiated, said serving MSC including:
• means for sending a reporting message from said serving MSC to said home HLR when a call is originated from said mobile station in said serving MSC, said reporting message indicating a reported location for said mobile station;
• and
• means for sending a paging result from said serving MSC to said home HLR;
• means within said home HLR for comparing said stored location to said reported location;
• means within said home HLR for sending a paging request message to said serving MSC to page said mobile station in said reported location when said stored location is identical to said reported location;
• and
• means within said home HLR for analyzing said stored location and said reported location, and said paging result from said serving MSC to determine whether said call origination is fraudulent.