Providing a roaming service among private mobile switching centers (MSCs)
interconnected to one another via a public switched telephone network (PSTN) includes
connecting the private mobile switching centers to a virtual private network (VPN)
via the PSTN; storing information about a mobile station registered for a private
mobile communication service and associated mobile station location information
in a selected private mobile switching center upon a mobile station sending a private
mobile communication service registration request to the selected one of the private
mobile switching centers; transmitting the mobile station information and the mobile
station location information to other private mobile switching centers via the
virtual private network; and the selected private mobile switching center the private
mobile communication service using the stored mobile station information and mobile
station location information upon the mobile station sending a private mobile communication
service request to a selected one of the private mobile switching centers.
