Method of processing incoming call of Citi2 system for public and private network

摘要

According to the present invention, a call of a Citi 2 system for a public network and a private network, which performs an incoming call procedure after tracking a location of a terminal in a Citi 2 (Codeless Telephone 2) system for a public network and a private network supporting incoming calls The present invention relates to a method for processing a location of a terminal by using a cell in a CIS (CT2 fixed part Information and Status) message, grouping a plurality of cells together, and performing an incoming call to the terminal from an exchange in an incoming call procedure. When the called exchange / base station controller informs the base stations belonging to the area where the called terminal is located and requests the unique identifier of the called terminal and confirms its location, each base station polls the terminal for ID OK for location tracking. The terminal monitoring the channel detects that polling is in progress and receives a response from the terminal. The base station reports the location confirmation of the terminal to the exchange / base station controller, and finally performs the incoming procedure defined in the CT2 specification only to the base station to which the exchange / base station controller reported the terminal location. By reducing the failure of incoming call due to the load of the image and the wrong location information, the system performance and wireless efficiency can be improved.