Syniverse Technologies, LLC

Paul Peregolise

Rakesh Mehta

Prashant Datar

Sreenivasa Ganji

Denison Risso

A method of providing voice call, data, and SMS services to a user equipment roaming in a 2G/3G visited network and subscribed to an LTE home network. An Interworking Function communicates with both the visited network and the home network. The Interworking Function translates between Mobile Application Part (MAP) protocol used by the 2G/3G visited network and Session Initiation Protocol (SIP) used by the LTE home network. The Interworking Function establishes both a MAP Registration with the 2G/3G visited network and also a SIP Registration with the LTE home network, thereby enabling provision of voice call, data, and SMS services to the roaming UE.

Method of providing data, voice, and SMS services to LTE subscribers roaming in 2G/3G visited networks

Authentication of a mobile device by its subscription is automatically performed by extracting the IMSI value from the mobile device's operating system via a locally installed mobile app. The IMSI value is passed onto an authentication system that has the necessary authentication and authorization infrastructure to query a mobile operator's database for a MSISDN associated with the IMSI value. If a valid MSISDN is found, the MSISDN is returned from the mobile operator to the authentication system and finally to the mobile app on the mobile device.

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Lithia, FL, United States of America

Paul Peregolise