Apparatus, method and system for matching subscriber states in network in which public land mobile network and wired/wireless private network are interworked

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 at least one 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 a public land mobile network and subscriber state information of a wired/wireless private network in a public and private mobile communication system interworked with the public land mobile network, by:
• a when a terminal located in the public and private cell area gives a response to a paging signal from the private network, allowing the public and private communication service apparatus to generate a message including a field in which state information of the terminal is recorded and transmitting the message to the public-network base station controller, the state information of the terminal indicating a busy 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.

A public and private communication service apparatus,

• the public private communication service apparatus being interworked with a public land mobile network including a plurality of mobile stations, at least one mobile switching center, 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 communication service apparatus being coupled to one or more private base station transceiver subsystems forming a public and private cell area, with the public and private communication service apparatus comprising:
• a network connection controller for 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 providing a network connection for private call services and generating a message including a field in which state information of a mobile station is recorded when a private call service request message has been received from the mobile station located in the public and private cell area and transmitting the message to the base station controller, the state information of the mobile station indicating that the mobile station is coupled to a private call;
• and
• a communication path former for forming a communication path corresponding to services requested in the received message in response to a control of the network connection controller.