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IMS service calling method, IMS service realization method and device
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A business call and business technology, applied in the field of communication, can solve problems such as reducing the success rate of conversations
Active Publication Date: 2017-06-06
DATANG MOBILE COMM EQUIP CO LTD
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At the same time, the media encoding format is also evolving with the development of computer technology and communication technology. Many new encoding formats emerge in an endless stream. It is inevitable that many sessions will fail due to unsuccessful negotiation of the media encoding format, thereby reducing the success rate of the session.
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Embodiment 1
[0140] see image 3 , is a block diagram of an IMS service call flow provided by an embodiment of the present invention. As shown, the process can include:
[0141] Step 301: UE1, as the calling user, sends an IMS service call request message to the core network equipment to call the called user UE2.
[0142] Step 302: The core network equipment judges whether the received IMS service call request message carries the SDP information of UE1, and if so, proceeds to step 303; otherwise, refer to Figure 4 process shown.
[0143] Usually, the IMS service call request message sent by the calling user carries the SDP information of the calling user. The SDP information may include the media coding type supported by UE1.
[0144] Step 303: the core network device forwards the IMS service call request message to UE2. According to the SDP information of UE2 and the SDP information of UE1 carried in the IMS service call request message, UE2 determines that UE2 cannot support the me...
Embodiment 2
[0215] see Figure 7 , is a block diagram of an IMS service call flow provided by an embodiment of the present invention. As shown, the process can include:
[0216] Step 701: UE1, as the calling user, sends an IMS service call request message to the core network equipment to call the called user UE2.
[0217] Step 702: The core network device judges whether the received IMS service call request message carries the SDP information of UE1, and if so, proceeds to step 703; otherwise, proceeds to step 705.
[0218] Usually, the IMS service call request message sent by the calling user carries the SDP information of the calling user. The SDP information may include the media coding type supported by UE1.
[0219] Step 703: The core network device judges whether it is allowed to provide value-added services for UE1, if allowed, go to step 704, otherwise go to step 705. This value-added service means that when the called user does not support the media encoding format of the cal...
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Abstract
The embodiment of the invention discloses an IMS service call method and an IMS service achieving method and device. The IMS service call method comprises the steps that a core network device receives an IMS service call request message sent by a call subscriber, wherein if the IMS service call request message comprises SDP information of the call subscriber, the core network device sends the IMS service call request message to a called subscriber; if the core network device receives a first IMS service call response message returned by the called subscriber and confirms that the called subscriber does not support a media coded format of the call subscriber according to the response message, the SDP media negotiation process between an MRF entity and the call subscriber and the SDP media negotiation process between the MRF entity and the called subscriber are triggered through an application server, and the call subscriber and the called subscriber can carry out IMS service conversation by utilizing the media coded format converting function of the MRF entity. According to the IMS service call method, the success rate of the IMS service conversation can be improved.
Description
technical field [0001] The invention relates to the communication field, in particular to an IMS service calling method, an IMS service realization method and a device. Background technique [0002] The IMS (IP Multimedia Subsystem, IP Multimedia Subsystem) session establishment process defined by the current 3GPP protocol relies on the SDP (Session Description Protocol, Session Description Protocol) information carried by the SIP (Session Initiation Protocol, Session Initiation Protocol) message to perform SDP media negotiation. If different terminals support different media encoding formats, the session will fail. [0003] Figure 1A An IMS service call flow is shown. Such as Figure 1A As shown, UE1 (UE: User Equipment, user equipment, terminal) sends a call request (INVITE) message, which carries UE1's SDP information, and the SDP information includes the media encoding type and port information supported by UE1. The INVITE message is passed S-CSCF (Serving Call Sessio...
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Application Information
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