Patent ID: 7353024

Claim:
A method, comprising: in a public and private mobile communication system interworked with a public land mobile network including one or more mobile switching centers, a plurality of public-network base station controllers coupled to each mobile switching center, and a plurality of public-network base station transceiver subsystems forming a public cell area and being coupled to each base station controller, the public and private mobile communication system including a public and private communication service apparatus coupled to one of the base station controllers, and one or more private base station transceiver subsystems forming a public and private cell area and being coupled to the public and private communication service apparatus, matching subscriber state information of the public land mobile network and subscriber state information of a wired/wireless private network in the public and private mobile communication system interworked with the public land mobile network, by: when state information of a terminal located in the public and private cell area is changed, generating by the public and private communication service apparatus a message including a field in which the changed state information of the terminal is recorded and transmitting the message to the public-network base station controller, with the state information of the terminal indicating whether the terminal is in busy state or in idle state; and the public-network base station controller receiving and reading the field indicating the state information of the terminal included in the message and update state information of the terminal located in a visitor location register on the public side.