| 摘要 |
The present invention relates to a call identification method and device, the method comprising: receiving an invite message transmitted by the network element of an IP multimedia subsystem (IMS), the invite message carrying called party identifier information (201); when a called terminal identified by the called party identifier information is a circuit switched (CS) network user, generating a call reference (CR) parameter or a global call reference (GCR) parameter for carrying the CR parameter or the GCR parameter in an initial address message (IAM) transmitted to a CS network element (202); generating a CS call reference header field according to the CR parameter or the GCR parameter, and sending a response message to the IMS network element, the message carrying the CS call reference header field to identify a call corresponding to the invite message (203). The present invention realizes a cross-domain call association through a unified CR parameter identifier. |
