Method and system for calling user of traditional circuit domain network through packet core network
A technology of traditional circuit domain and packet core network, applied in the field of packet core network calling traditional circuit domain network users and systems, it can solve the problems of long addressing process, inability to use directly, waste of resources, etc., to enhance user friendliness, avoid Waiting for wasted effect
Active Publication Date: 2014-03-12
NANJING ZHONGXING XIN SOFTWARE CO LTD
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Problems solved by technology
Although this method can solve the above-mentioned IMS problem, it brings a new problem: in the above-mentioned requirements, the calling user and the called user belong to different networks, and the two cannot be directly adopted.” "early media" method, the media negotiation is carried out between the calling user terminal and the media gateway control unit
[0013] (1) Due to the cross-network addressing, the addressing process is generally longer, and there is no status indication for the calling user during the addressing process, and the friendliness is poor;
[0014] (2) In the process of IAM addressing, if there is a problem with the circuit domain network or the called UE has left the service area, if you wait for the circuit domain network to feed back the message that the IAM addressing fails, a lot of time will be wasted time;
[0015] (3) The media negotiation process of Offer / Answer is carried out before IAM addressing. Once the address of the called user cannot be found, the media negotiation process of invalid Offer / Answer before is an additional waste of resources
Method used
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[0035] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0036] The present invention provides a communication system in which a packet core network calls a user of a traditional circuit domain network, and each entity included in the system is as follows:
[0037]1) The calling UE is a traditional fixed phone, ISDN (Integrated Services Digital Network, Integrated Services Digital Network) terminal, SIP terminal, H.323 terminal, softphone, GSM (Global System for mobile Communications, Global Mobile Communications) System) mobile phone, CDMA (Code Division Multiple Access, Code Division Multiple Access) mobile phone, 3G mobile phone, WLAN (Wireless Local Area Network, wireless local area network) terminal, PHS (Personal Handyphone System, personal hand-held phone system) and any other mobile phone that can be connected A communication terminal entering the packet core network;
[0038] ...
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A method and a system for calling a traditional circuit switched domain network user by a packet core network. The method includes: after receiving a request message from a call session control unit, a media gateway control unit sends the call session control unit a first call progress message carrying a preset prompt tone indicating please wait; the media gateway control unit sends an initial address message to the traditional circuit switched domain network and start a preset timer; if the timer expires and the traditional circuit switched domain network does not respond, the media gateway control unit sends the call session control unit a second call progress message carrying a preset prompt tone indicating that the other party is temporarily unaccessible, and the media gateway control unit proceeds according to a preset policy. Resource waste due to waiting is avoided and better user friendliness of a service is provided.
Description
technical field [0001] The present invention relates to the intercommunication technology between packet core network and traditional circuit domain network using session initiation protocol as call control signaling in mobile communication technology, in particular to a method and system for packet core network to call traditional circuit domain network users. Background technique [0002] IMS (IP Multimedia Subsystem, Internet Protocol Multimedia Subsystem) is an Internet Protocol multimedia subsystem in the 3GPP (3rd Generation Partnership Project) network, and will become LTE (Long Term Evolution, long-term evolution) in the future. ) to realize the target application network of packet voice and multimedia information services. [0003] IMS uses the IP (Internet Protocol, Internet Protocol) packet domain as the bearer channel for its control signaling and media transmission, and uses the SIP protocol (Session Initiation Protocol, Session Initiation Protocol) as the call ...
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IPC IPC(8): H04W4/12H04L29/06
CPCH04M7/1205
Inventor 高明刚
Owner NANJING ZHONGXING XIN SOFTWARE CO LTD