Mobile Radio Access Information Validation

A validation method for validating IP information headers in data packets received from user equipment that connect to a mobile telecommunications network and that access an IP network through a proxy, comprising:

• detecting an IP information header comprising access network information;
• extracting data contained in said IP information header and identifying said user equipment;
• requesting trusted location information of said user equipment from a trusted source of said mobile telecommunications network;
• comparing said trusted location information provided by said trusted source with location information detected in said IP information header;
• asserting said IP information header if the location information in said IP information header corresponds to said location information provided from said trusted source;
• and
• adding said trusted location information into an IP information header of a message to be sent to a location based function.

An IP information header validator for use in a telecommunications system, the IP information header validator configured to:

• detect data packets from user equipment that are connected to a mobile telecommunications network and that access an IP network, said data packets each including an IP information header;
• detect an IP information header comprising access network information;
• extract data contained in said IP information header and identify said user equipment from which the IP information header was received;
• request trusted location information of said user equipment from a trusted source of said mobile telecommunications network;
• compare said trusted location information provided by said trusted source with location information detected in said IP information header,
• assert said IP information header if the location information in said IP information header corresponds to said location information provided from said trusted source;
• and
• add said trusted location information data into said IP information header of a message to be sent to a location based function.

A mobile telecommunications network comprising a connection to an IP network and a proxy for allowing a user equipment to access said IP network, wherein said proxy includes a validator configured to:

• detect data packets from user equipment that are connected to the mobile telecommunications network and that access the IP network, said data packets each including an IP information header;
• detect an IP information header comprising access network information;
• extract data contained in said IP information header and identify said user equipment from which the IP information header was received;
• request trusted location information of said user equipment from a trusted source of said mobile telecommunications network;
• compare said trusted location information provided by said trusted source with location information detected in said IP information header,
• assert said IP information header if the location information in said IP information header corresponds to said location information provided from said trusted source;
• and
• add said trusted location information data into said IP information header of a message to be sent to a location based function.