Communication method, communication system and apparatus for IMS network

Abstract

The invention discloses a communication method, a communication system and a device in an information management system (IMS ) network. The method includes: an I-CSCF (Interrogating Call Session Control Function) or IBCF (Internet Border Control Function) positioned in a called network receives session request information sent by a calling network, ensures the called number in the session request information to be uncompleted, and sends provisional response information for establishing early dialog to the calling network, the provisional response information is used for indicating network element of the calling network to send subsequently received called number or updated called number to the I-CSCF or IBCF of the called network by the information of the session, thereby realizing the processing of overlapping code sending of IMS network and leading the IMS network and other networks supporting overlapping code sending to be capable of realizing intercommunication.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a communication method, communication system and device in an IMS network. Background technique [0002] The IP Multimedia Subsystem (IP Multimedia subsystem, hereinafter referred to as: IMS) is a subsystem superimposed on the packet network of the 3rd Generation Partnership Project (3rd Generation Partnership Project, hereinafter referred to as: 3GPP), which uses the IP packet domain as its control signal For the bearer channel of order and media transmission, the Session Initiation Protocol (hereinafter referred to as: SIP) is introduced as the service control protocol, and the features of SIP are simple, easy to expand, and convenient for media combination to realize service management, session control and bearer access The separation of the three provides rich multimedia services. The main functional entities in IMS include: Call Session Control Function (Call...

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Problems solved by technology

[0003] In the current IMS system defined by 3GPP, when the calling user dials the called user, all the called numbers are dialed and then the invite message is sent to the IMS system. However, in the process of realizing the present invention, the inventor found that because the IMS network also needs to communicate with existing fixed networks and other networks, and the caller in the existing fixed network will perform overlapping sending during the dialing process. In this way, when the IMS network is used as the called network, the IMS network does not have a suitable mechanism for processing, which affects the intercommunication between the IMS network and other networks that support overlapping code sending.

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