Call blind transfer method and call blind transfer system based on sip protocol

Abstract

The invention discloses a call blind transfer method based on the SIP protocol and a corresponding call blind transfer system. The process signaling of the blind transfer method is based on the SIP protocol, and a softswitch server is used to directly initiate a Refer message and an Invite message, thus abandoning the traditional dependence Based on the method of sending SIP messages on SIP terminal equipment, it is proposed to realize the call blind transfer function based on the SIP protocol without relying on the terminal equipment. The call transfer service party, call transferee, and transfer target party can be realized as long as they support the RFC3261SIP protocol , which avoids the forwarding failure caused by terminal incompatibility, simplifies the sending link, and has good scalability and implementability.

Description

technical field

[0001] The invention relates to a call blind transfer method in communication and a corresponding call blind transfer system, in particular to a call blind transfer method based on the SIP protocol and a corresponding call blind transfer system. Background technique

[0002] The technology of the communication industry is changing with each passing day, and the NGN network technology has become the leading technology in the communication field. Among them, the softswitch device is the core device for the evolution from the circuit switching network to the packet network, and also plays a pivotal role in the NGN network. It is independent of the underlying bearer protocol, and mainly completes the main functions such as call control, media gateway intervention control, resource allocation, protocol processing, routing, authentication, and billing. The transmission reliability of softswitch equipment is high, and the dependence on terminal equipment is small. ...

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