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

摘要

The system for playing coloring ring back tone(CRBT) based on the called user's state presence information in the invention includes: HLR, the calling user's MSC/VLR, the called user' s MSC/VLR, CRBT control server and state presence server. The method for playing CRBT based on the called user's state presence information in the invention includes: provides the state presence server in the communication system which including the CRBT control server; establishes physical connection channel and defines information interactive interface between the CRBT control server and the state presence server; the CRBT control server obtains the called user's current state information by exchanging the information through the information exchange interface; the CRBT control server plays the corresponding CRBT based on the obtained information and the related contracted information of the CRBT service when the user is called. Thus, the CRBT control server can play the CRBT based on the playing priority early defined by the called user.