Architecture of internet protocol-based cellular networks

A system for integrating cellular telephone and internet protocol networks, comprising:

• at least one router for routing voice calls and data on both an internet protocol network and a cellular telephone network, wherein the router converts the voice calls and data on the cellular telephone network into an internet protocol for transmission on the internet protocol network, and the router converts the voice calls and data on the internet protocol network into a cellular telephone protocol for transmission on the cellular telephone network;
• at least one base transceiver station, directly coupled to the router using the cellular telephone network, for communicating the voice calls and data with a mobile telephone using radio frequency signals within a transmission area associated with the base transceiver station and for transferring the voice calls and data between the mobile telephone and the router;
• and
• at least one home agent and foreign agent, both directly coupled to the router via the internet protocol network, for forwarding the voice calls and data to the mobile telephone based on an internet protocol address for the mobile telephone, wherein the home agent registers a mobile telephone with the foreign agent, the home agent tunnels the voice calls and data for the mobile telephone to the foreign agent through the router, and the foreign agent delivers the tunneled voice calls and data to the mobile telephone via the router using the internet protocol address for the mobile telephone.