Patent ID: 8204202

Claim:
A method for playing a Ring Back Tone (RBT) in an IP Multimedia Subsystem (IMS) network, comprising: storing an RBT playing policy of the subscriber that comprises a corresponding relationship among a called user ID, status information of the called user; an RBT ID and a priority ID; obtaining current status information of a called user; determining an RBT identifier (ID) corresponding to the current status information of the called user according to a corresponding relationship between the status information of subscriber and RBT IDs; and obtaining an RBT identified by the RBT ID and playing the RBT identified by the RBT ID to a calling user according to the RBT ID; selecting one RBT ID with a higher priority when determining more than one RBT ID according to the corresponding relationship between the status information of the called user and the RBT ID; and playing the RBT identified by the RBT ID with a higher priority to the calling user according to the RBT ID with a higher priority.