PRIVATE BRANCH MOBILE COMMUNICATION SYSTEM AND METHOD

摘要

The invention provides a private branch mobile communication apparatus and method which allows hand-over without interruption of communication and makes it possible to allow a service from a private branch exchange of a home node to be utilized as it is even if a radio terminal moves from the private branch exchange of the home node to another private branch exchange. A network common database, a local database and a memory section are stored in each of private branch exchanges. When a radio terminal forwards a position registration request to a radio base station belonging to a second private branch exchange other than the home node to the radio terminal, the second private branch exchange refers to the network common database to access the local database and the memory section of the private branch exchange of the home node, and then refers to the network common database to perform position registration into the private branch exchange of the home node and extract service data of an additional service to be performed by the private branch exchange which has received the position registration request other than the home node.