Patent ID: 8855282
Filing Date: 2014-10-07
Classification: H04M

Abstract:
1. A method for implementing a multimedia ring back tone service, comprising: receiving, by a caller tone application server, a call request originated by a calling terminal, and forwarding the call request to a callee tone application server; parsing, by the caller tone application server, a tone playing policy according to the call request, wherein the tone playing policy specifies whether to play a caller tone or a callee tone; determining, by the caller tone application server, whether to perform a caller tone media negotiation according to the parsing result; receiving, by the caller tone application server, a call response including an early media Session Description Protocol (SDP) of the callee tone from the callee tone application server; substituting, by the caller tone application server, an early media SDP of the caller tone for the early media SDP of the callee tone in the received call response when the caller tone media negotiation is determined to be performed; sending, by the caller tone application server, the received call response which comprises the early media SDP of the caller calling tone to the calling terminal; instructing, by the caller tone application server, a Media Resource Server (MRS) to play the caller tone to the calling terminal according to the caller tone media negotiation result upon reception of an alerting signal from a called terminal.