Communication System Using Heterogeneous Networks

摘要

Disclosed is a communication system and, more particularly, a communication system using heterogeneous networks to support voice calls by combining private mobile networks, Mobile Network Operators (MNOs), and Public Switched Telephone Networks (PSTNs) even when an application for voice talk has not been installed on the mobile terminal.

主权项

1. A communication system using heterogeneous networks characterized by:
implementing a mobile Voice over Internet Protocol (mVoIP) environment with an IP network including one of a Mobile Network Operator (MNO) and a private mobile network, and a Public Switched Telephone Network (PSTN), and making network access with a sender terminal and a receiver terminal, on which an application for supporting voice calls is installed based on the mVoIP environment, obtaining network state information about at least one of a network accessing the sender terminal, a condition of the network, and a voice call option through the application, if the application is installed on the sender terminal and the sender terminal sends a call access request to the receiver terminal, and setting up one of a lowest cost route and a best quality route between the sender terminal and the receiver terminal as a communication route, based on the network state information, wherein the communication route is formed in selective combination of the IP network and the PSTN network.