Method for providing roaming service among private mobile switching centers

摘要

Disclosed is a method for providing a roaming service among private mobile switching centers (MSCs) interconnected to one another via a public switched telephone network (PSTN). The method comprises connecting the private mobile switching centers to a virtual private network (VPN) via the PSTN; if a mobile station sends a private mobile communication service registration request to a selected one of the private mobile switching centers, storing, by the selected private mobile switching center, information about the mobile station registered for the private mobile communication service and associated mobile station location information; transmitting the mobile station information and the mobile station location information to other private mobile switching centers via the virtual private network; and if the mobile station sends a private mobile communication service request to a selected one of the private mobile switching centers, providing, by the selected private mobile switching center, the private mobile communication service using the stored mobile station information and mobile station location information, and the virtual private network.