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United States Patent 7,640,038
Reddy December 29, 2009

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Mobile unit having internet protocol functionality


Abstract
A mobile unit includes a handset and a removable storage module having a unique storage module identity, for storing information specific to a user, including an Internet Protocol (IP) address. Additional information regarding a Public Land Mobile Network (PLMN) and International Mobile Subscriber Identity (IMSI) which uniquely identifies the subscriber is also stored in the removable storage module. Upon successfully camping on a cell of a mobile network, the IP address is forwarded to an IP-based network capable of communicating with the mobile unit. In an alternate embodiment, the mobile unit has multi-network capabilities which allow it to communicate with an IP-based network and a cellular network at the same time. In another embodiment, existing cellular network services for the mobile unit having multi-network capabilities are routed through the IP-based network.


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Inventors: Reddy; Gautam G. (King of Prussia, PA)
Assignee: InterDigital Technology Corporation (Wilmington, DE)

Appl. No.: 10/441,432
Filed: May 20, 2003

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Related U.S. Patent Documents

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Application Number Filing Date Patent Number Issue Date
60382361 May., 2002


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Current U.S. Class: 455/558 ; 455/432.1
Current International Class: H04M 1/00 (20060101)
Field of Search: 455/552.1,436-442,432.1,434,558 370/338,352,467,310