Portable wireless telephone system

摘要

The invention relates to the general field of a portable wireless communication system. In particular, the wireless communication system is designed to integrate with existing cellular communication systems and wireless local area network (LAN) systems. In one embodiment, the invention is a portable communication system that combines the advantages of the cellular wide area coverage with the low cost of WiFi Internet telephones. Advantages of the invention include the ability for portable devices to communicate with other users via both cellular and WiFi by the least expensive means possible. The result is a cost effective telecommunications network. Additional advantages include the ability to hand-over calls between cellular networks and WiFi networks. Additional advantages include true number portability since any telephone number can now be accessed via a number of different networks.