A SYSTEM AND A METHOD FOR PLAYING COLORING RING BACK TONE BASED ON THE CALLED USER'S STATE PRESENCE INFORMATION

摘要

A system for playing coloring ring back tone (CRBT) based on a user's state presence information according to the present invention includes network element devices of: a HLR, a calling user's MSC/VLR, a called user's MSC/VLR, a CRBT control server and a state presence server. A method for playing CRBT based on a user's state presence information according to the present invention includes: providing a construction state presence server in a communication system which includes a CRBT control server; establishing a physical connection channel and defining an information interactive interface between the CRBT control server and the state presence server; the CRBT control server obtaining the called user's current state information by exchanging information through the information interactive interface; and the CRBT control server plays a corresponding CRBT based on the current state information of the called user and corresponding subscription information of the coloring ring back tone service when the user is called. Thus, the CRBT control server can play the CRBT based on a playing priority early defined by the called user.