Systems and methods for internetworking data networks having mobility management functions

A method for allowing a CDPD MES to exchange data across the Internet, comprising the steps of:

• (a) providing said CDPD MES with an Internet program for forming a mobile connection to the Internet;
• and
• (b) providing a foreign agent with a program for monitoring a registration request from said CDPD MES and, in response thereto, generating a redirect request representative of an instruction for directing an MDIS associated with said CDPD MES to forward a data packet to said foreign agent.

Apparatus for allowing a CDPD MES to exchange data across the Internet, comprising:

• (a) a program for forming a mobile connection to the Internet;
• and
• (b) a foreign agent having a program for monitoring a registration request from said CDPD MES, and in response thereto, for generating a redirect request representative of an instruction for directing an MDIS associated with said CDPD MES to forward a data packet to said foreign agent.

A mobile data device, comprising:

• (a) a data communicator for connecting to a cellular network and having an identifier signal for identifying said mobile data device as a network entity of said cellular network;
• and
• (b) a registration processor for providing said identifier signal to a mobility service controller of a second data network for directing said mobility service controller to route data to said cellular network.

A mobility service controller, comprising:

• (a) a processor for routing data to a mobile data device of a first network;
• and
• (b) a processor for encapsulating data for transmission to a mobile service controller of a second network.

A computer program for interfacing to a data communicator for connecting to a cellular network and for collecting from said data communicator an identifier signal for identifying said mobile data device as a network entity of said cellular network, and for providing said identifier signal to a mobility service controller of a second data network for directing said mobility service controller to route data to said cellular network.