CN101646271A - Method, device and system for realizing multimedia services before answering - Google Patents

Method, device and system for realizing multimedia services before answering Download PDF

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Publication number
CN101646271A
CN101646271A CN 200810117860 CN200810117860A CN101646271A CN 101646271 A CN101646271 A CN 101646271A CN 200810117860 CN200810117860 CN 200810117860 CN 200810117860 A CN200810117860 A CN 200810117860A CN 101646271 A CN101646271 A CN 101646271A
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Prior art keywords
message
multimedia
calling terminal
calling
center
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CN101646271B (en
Inventor
方建成
桑涛
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN 200810117860 priority Critical patent/CN101646271B/en
Priority to PCT/CN2009/071520 priority patent/WO2010015157A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/42017—Customized ring-back tones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1069—Session establishment or de-establishment

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

The embodiment of the invention provides a method, a device and a system for realizing multimedia services before answering, and relates to the technical field of communication. The method, the deviceand the system are invented to improve the success rate of negotiation between a calling terminal and a multimedia center, and ensure that the multimedia center can provide a complicated multimedia service model. The method comprises the following steps: carrying out multimedia service operation according to a call request of a calling mobile exchanging center; sending a progress indicating message to the mobile exchanging center to ensure that the mobile exchanging center sends a connection message to the calling terminal according to the progress indicating message; receiving the negotiation request sent by the calling terminal, carrying out negotiation operation with the call originating terminal, wherein the negotiation request is sent after the calling terminal receives the connection message; and providing the multimedia services before answering to the call originating terminal. The embodiment of the invention is mainly applied in the technical field of the multimedia servicesbefore answering.

Description

Method, equipment and system for realizing multimedia service before response
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, a device, and a system for implementing a multimedia service before a response based on a VIG (Video interworking gateway).
Background
In order to provide rich call services to the terminal in the 2G network, some non-billable voice services are usually provided to the calling terminal before the calling terminal receives an Answer Message (ANM). We refer to these voice services as pre-answer voice services, a class of pre-answer voice services that includes: the color ring heard when the calling terminal dials the called terminal, the language selection and the seat number reporting when the calling terminal dials the call center, etc.
With the development of communication technology, communication networks are currently undergoing a change from 2G networks to 3G networks. The most significant advantage of 3G networks over 2G networks is that 3G networks can provide video call services to terminals. Therefore, with the continuous development, the voice service before response in the 2G network is changed into the multimedia service before response for the 3G network. The pre-answer multimedia services refer to some multimedia services provided by the communication network for the calling terminal before the calling terminal receives the answer message. The multimedia services before response comprise video color ring which is seen when the calling terminal dials the called terminal, video prompt and selection when the calling terminal dials the call center, and the like. Compared with the voice service before response under the 2G network environment, the multimedia service before response in the 3G network enables the experience of the terminal to be richer, and the information receiving mode to be more direct, clear and convenient.
Taking video color ring back tone service as an example, as shown in fig. 1, when a calling terminal calls a called terminal in a 3G network, the method for implementing multimedia service before response comprises the following steps:
step 11, initiating a call at a calling terminal, and sending a Setup message to a Mobile Switching Center (MSC);
step 12, the calling mobile switching center sends SRI (Sending routing information) message to HLR (Home Location Register) of the called terminal according to the Setup message, and inquires MSRN (mobile subscriber roaming Number) of the called terminal;
step 13, HLR of the called terminal sends SRI _ ACK (route message acknowledgement) message to the calling MSC, the message includes MSRN number of the called terminal;
step 14, after obtaining the MSRN (mobile Subscriber Roaming Number), the calling MSC sends a Call _ Proceeding message to the calling terminal;
step 15, the calling MSC sends an IAM Message (Initial Address Message) to an MMC (Multimedia Center);
step 16, the MMC sends an ACM (Address Complete Message) Message carrying a video call indication to the MSC of the calling terminal;
step 17, the MSC of the calling terminal sends Alerting message to the calling terminal;
step 18, at the same time as step 17, the MMC performs multimedia color ring service operation;
step 19, after step 17, the MSC of the calling terminal sends a Connect message to the calling terminal to inform the calling terminal to perform h.245 negotiation with the MMC;
step 20, the calling terminal sends a Connect _ Ack (connection acknowledgement) message to the MSC of the calling terminal;
step 21, the calling terminal and the MMC carry out H.245 negotiation;
step 22, after the negotiation is successful, the MMC provides multimedia service before response for the calling terminal.
In the process of implementing the voice before answer service, the inventor finds that at least the following problems exist in the prior art: because the calling terminal needs to request the MMC for the capability information of providing the multimedia service during the h.245 negotiation between the calling terminal and the MMC, but when the calling terminal receives the Connect message of the calling mobile switching center to negotiate with the multimedia center, the MMC may not be performing multimedia service operation, so the MMC cannot provide the calling terminal with the capability information of the multimedia service, thereby causing the failure of the h.245 negotiation process between the calling terminal and the MMC; this also restricts the service capability of the MMC, so that the MMC cannot provide a complex multimedia service model.
Disclosure of Invention
Embodiments of the present invention provide a method, an apparatus, and a system for implementing a pre-answer multimedia service, so as to improve a success rate of negotiation between a calling terminal and a multimedia center, and enable the multimedia center to provide a complex multimedia service model.
The method for realizing the multimedia service before response of the embodiment of the invention adopts the following technical scheme:
a method for implementing a pre-answer multimedia service, comprising the steps of:
performing multimedia service operation according to the call request of the calling mobile switching center;
after the multimedia service operation is completed, sending a progress indication message to the calling mobile switching center, so that the calling mobile switching center sends a connection message to a calling terminal according to the progress indication message;
receiving a negotiation request sent by the calling terminal, and performing negotiation operation with the calling terminal, wherein the negotiation request is sent by the calling terminal after receiving the connection message;
and after the negotiation operation is completed, providing the multimedia service before response to the calling terminal.
The method for realizing the multimedia service before the response of the embodiment of the invention can also adopt the following technical scheme:
a method for implementing a pre-answer multimedia service, comprising the steps of:
receiving a progress indication message sent by a multimedia center;
and sending a connection message to a calling terminal according to the progress indication message, and indicating the calling terminal to initiate a negotiation process with the multimedia center.
The multimedia center of the embodiment of the invention adopts the following technical scheme:
a multimedia center comprising:
a receiving unit, configured to receive a call request from a calling mobile switching center and a negotiation request from a calling terminal;
the operation unit is used for carrying out multimedia service operation according to the call request received by the receiving unit;
a sending unit, configured to send a progress indication message to the calling mobile switching center after the operation unit completes a multimedia service operation, so that the calling mobile switching center sends a connection message to a calling terminal according to the progress indication message;
the negotiation unit is used for carrying out negotiation operation with the calling terminal according to the negotiation request received by the receiving unit;
and the multimedia service providing unit is used for providing the multimedia service before response to the calling terminal after the negotiation operation of the negotiation unit is completed.
The mobile switching center of the embodiment of the invention adopts the following technical scheme:
a mobile switching center comprising:
the message receiving unit is used for receiving a progress indication message sent by the multimedia center;
and the message sending unit is used for sending a connection message to the calling terminal according to the progress indication message, and indicating the calling terminal to initiate a negotiation process with the multimedia center.
The system for realizing the multimedia service before response of the embodiment of the invention adopts the following technical scheme:
a system for implementing a pre-answer multimedia service, comprising: a multimedia center and a calling mobile switching center; wherein,
the multimedia center is used for sending a progress indication message to the calling mobile switching center after multimedia service operation is carried out according to the call of the calling mobile switching center;
and the calling mobile switching center is used for sending a connection message to a calling terminal according to the progress indication message, and indicating the calling terminal to initiate a negotiation process with the multimedia center.
In the embodiment of the invention, after the multimedia center completes the multimedia service operation according to the call of the calling mobile switching center, the multimedia center sends a progress indication message to the calling mobile switching center to indicate that the multimedia center has completed the corresponding multimedia service operation. After receiving the progress indication message, the calling mobile switching center sends a connection request to the calling terminal according to the message to indicate that the calling terminal can initiate a negotiation operation process with the multimedia center. Because the multimedia center uses the progress indication message to indicate that the multimedia service operation is completed, the calling terminal can accurately obtain the capability information of the multimedia center for providing the multimedia service in the negotiation operation process, thereby improving the success rate of the negotiation operation with the multimedia center.
Meanwhile, because the multimedia service operation of the multimedia center has a time sequence precedence relationship with the connection message of the calling mobile switching center, that is, the calling mobile switching center can send the connection message to the calling terminal only after receiving the progress indication message, which can ensure that the multimedia center has enough time to complete various complex multimedia service operations, thereby providing a more complex multimedia service model.
Drawings
FIG. 1 is a flow chart of a prior art implementation of pre-answer multimedia services;
FIG. 2 is a diagram illustrating a system for implementing pre-answer multimedia services in accordance with an embodiment of the present invention;
FIG. 3 is a flow chart of a method for implementing a pre-answer multimedia service according to an embodiment of the present invention;
FIG. 4 is a flowchart of a method for implementing a pre-answer multimedia service according to an embodiment of the present invention;
FIG. 5 is a flowchart of a method for implementing a pre-answer multimedia service according to an embodiment of the present invention;
FIG. 6 is a flowchart of a method for implementing a pre-answer multimedia service according to an embodiment of the present invention;
FIG. 7 is a block diagram of a multimedia center according to an embodiment of the present invention;
FIG. 8 is a block diagram of a mobile switching center according to an embodiment of the present invention;
fig. 9 is a diagram of a mobile switching center according to an embodiment of the invention.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
In order to solve the problems that in the prior art, due to the fact that no time sequence relationship exists between the multimedia service operation of the multimedia center and the Connect message (connection message) of the calling mobile switching center indicating the negotiation operation of the calling terminal, the calling terminal cannot acquire the capability information of the multimedia center for providing the multimedia service, negotiation failure with the multimedia center is caused, and complex multimedia operation of the multimedia center is limited, the embodiment of the invention provides a system for realizing the multimedia service.
As shown in fig. 2, the system for implementing multimedia services according to the embodiment of the present invention includes: a multimedia center 21 and an originating mobile switching center 22. The multimedia center 21 is configured to send a progress indication message to a calling mobile switching center after performing a multimedia service operation according to a call of the calling mobile switching center; the calling mobile switching center 22 is configured to send a connection message to the calling terminal according to the progress indication message, and indicate the calling terminal to initiate a negotiation process with the multimedia center.
The Progress indication message may be a Call Progress message (CPG, Call Progress), or may be other types of messages capable of carrying the Progress indication message.
In the embodiment of the invention, after the multimedia center completes the multimedia service operation according to the call of the calling mobile switching center, the multimedia center sends a progress indication message to the calling mobile switching center to indicate that the multimedia center has completed the corresponding multimedia service operation. After receiving the progress indication message, the calling mobile switching center sends a connection request to the calling terminal according to the message to indicate that the calling terminal can initiate a negotiation operation process with the multimedia center. Because the multimedia center uses the progress indication message to indicate that the multimedia service operation is completed, the calling terminal can accurately obtain the capability information of the multimedia center for providing the multimedia service in the negotiation operation process, thereby improving the success rate of the negotiation operation with the multimedia center.
Meanwhile, because the multimedia service operation of the multimedia center has a time sequence precedence relationship with the connection message of the calling mobile switching center, that is, the calling mobile switching center can send the connection message to the calling terminal only after receiving the progress indication message, which can ensure that the multimedia center has enough time to complete various complex multimedia service operations, thereby providing a more complex multimedia service model.
The following describes, with reference to corresponding embodiments, an implementation process of a method for implementing a pre-response multimedia service according to an embodiment of the present invention.
As shown in fig. 3, the method for implementing the multimedia service before response in the embodiment of the present invention includes the following steps:
step 31, the multimedia center performs multimedia service operation according to the call of the calling mobile switching center;
taking the example that the calling terminal initiates a call to the called terminal, after the calling terminal initiates the call, the calling Mobile switching center will query the MSRN number and the MSISDN (Mobile Station Integrated Services digital number) number of the called terminal from the home location register of the called terminal according to the request of the calling terminal; and after the MSRN and the MSISDN returned by the home location register are obtained, sending a message of continuing calling to the calling terminal. Then, the calling mobile switching center sends an Initial Address Message (IAM) to the multimedia center, where the Initial Address Message includes the multimedia service number, and the MSRN number and the MSISDN number of the called terminal. After receiving the Address Completion Message (ACM) sent by the multimedia center, sending a ringing message to the calling terminal. And then, the multimedia center performs multimedia service operation.
Step 32, after the multimedia service operation is completed, the multimedia center sends a progress indication message to the calling mobile switching center;
in the process, after the multimedia center performs the multimedia service operation according to the call of the calling terminal, the multimedia center sends a progress indication message to the calling mobile switching center to inform the calling mobile switching center that the multimedia service operation is completed. The calling mobile switching center sends a connection message (Connect) to a calling terminal according to the progress indication message; and after receiving the connection message, the calling terminal sends a connection response message (Connect _ Ack) to the calling mobile switching center.
Step 33, the multimedia center receives the negotiation request sent by the calling terminal according to the progress indication message, and performs negotiation operation with the calling terminal;
step 34, after the negotiation operation is completed, the multimedia center provides the multimedia service before response to the calling terminal.
In addition, when the called terminal answers the call of the calling terminal, that is, when the call is successfully established, the multimedia center sends an Answer Message (ANM) to the calling mobile switching center, and the calling mobile switching center charges the calling terminal after receiving the Answer Message.
In this embodiment, the Progress indication message may be a Call Progress message (CPG), or may be other types of messages capable of carrying the Progress indication message.
As shown in fig. 4, the method for implementing multimedia service before response of the embodiment of the present invention includes the following steps:
step 41, the calling mobile switching center receives a progress indication message sent by the multimedia center after the multimedia center performs the multimedia service operation;
after the calling terminal initiates a call, the calling mobile switching center queries the MSRN number of the called terminal from the called mobile switching center of the called terminal according to the request of the calling terminal; and after the MSRN is obtained, sending a message of call continuation to the calling terminal. And after receiving an Address Completion Message (ACM) sent by the multimedia center, sending a ringing message to the calling terminal.
And step 42, the calling mobile switching center sends a connection message to the calling terminal according to the progress indication message, indicates the calling terminal to initiate a negotiation process with the multimedia center, and charges the calling terminal after receiving a response message of the multimedia center.
In order to more clearly understand the technical solution of the embodiment of the present invention, the following describes an implementation process of the embodiment of the present invention with reference to two specific embodiments. In the following embodiments, the progress indication message is exemplified as a CPG message.
In the following embodiments, the multimedia service before the response is a video color ring service. In this embodiment, the network device implementing the Multimedia center function is an MRBT (Multimedia Ring Back Tone platform). The MRBT comprises an IP device with the capability of broadband video resources, and the IP device also has the capability of narrowband circuit switching.
As shown in fig. 5, the embodiment of the present invention includes the following steps:
step 501, the calling terminal sends a Setup message to the calling MSC, where the Information Transfer Capacity (ITC) in a BC _ IE (Bear Capacity _ identity Element) cell carried in the message is UDI ', ORA (other rate attachment, other rate identification) is h.223& h.245', and each parameter in the message needs to meet the specification of "general technical requirement for chinese mobile 3G circuit domain videophone";
step 502, after receiving the Setup message of the calling terminal, the calling MSC sends an SRI message to the called HLR, and inquires routing information;
step 503, the called HLR sends a PRN message to the called MSC where the called terminal is currently located, and queries the MSRN number of the called terminal;
step 504, called MSC distributes MSRN for the called terminal, and returns PRN _ ACK message to called HLR, the message includes the MSRN number;
step 505, the called HLR sends an SRI _ ACK message to the calling MSC, where the SRI _ ACK message includes the MSRN number of the called terminal and the multimedia coloring ring back tone supplementary service Code SS _ Code; the called HLR can also inquire the information of the called terminal stored on the called HLR to acquire the MSISDN number of the called terminal;
step 506, after obtaining the MSRN of the called terminal, the calling MSC sends a Call _ Proceeding message to the calling terminal;
step 507, the calling MSC determines that the called terminal is a terminal capable of supporting multimedia coloring ring back tone service according to the multimedia coloring ring back tone supplementary service code, and thus sends an IAM message to the MRBT call. The following information needs to be included in the IAM message: multimedia color ring back tone supplementary service code, MSRN of the called terminal and MSISDN of the called terminal;
step 508, MRBT obtains MSRN number of called terminal through IAM message, then initiates IAM message to called MSC side;
step 509, the called MSC sends Paging to the called terminal to page the called terminal;
step 510, the called terminal responds to the Paging of the called MSC and sends a Page _ Ack message to the called MSC;
step 511, the called MSC sends a Setup message to the called terminal, where the ITC in the BC _ IE cell carried in the message is 'UDI', and ORA is 'h.223 & h.245';
step 512, the called terminal returns a Call Confirmed message, where the message does not carry a new BC _ IE, which indicates that the called terminal can support a VP (Video Phone) Call;
step 513, after the connection is successfully established with the called terminal, the called terminal rings, and simultaneously returns a ringing message Alerting to the called MSC;
step 514, the called MSC sends ACM message to MRBT, which indicates the state of the called terminal is idle;
step 515, the MRBT sends an ACM message to the calling MSC;
step 516, the calling MSC sends Alerting message to the calling mobile terminal;
517, MRBT carries out multimedia color ring operation;
step 518, the MRBT sends a CPG message carrying a multimedia coloring ring back tone playing indication to the calling MSC;
step 519, the calling MSC sends Connect message to the calling terminal, indicates the calling terminal, and can perform H.245 negotiation with MRBT;
step 520, the calling terminal sends a Connect _ ack message to the calling MSC;
step 521, the calling terminal and the MRBT carry out H.245 negotiation;
522, after the negotiation is successful, playing the multimedia coloring ring back tone to the calling terminal;
step 523, after the called terminal responds, the called terminal sends Connect message to the called MSC;
step 524, the called MSC sends an ANM response message to the MRBT;
step 525, the called MSC sends a Connect _ ack message to the called terminal;
step 526, the MRBT sends an ANM response message to the calling MSC; the calling MSC starts to charge the calling terminal;
and step 527, the called terminal and the MRBT establish H.245. Meanwhile, the MRBT stops playing the multimedia coloring ring back tone to the calling terminal and connects the calling and called audio and video channels;
step 528, the calling terminal and the called terminal start the video call.
In the following embodiments, the calling terminal calls the multimedia call center as an example. The multimedia call center for realizing the function of the multimedia center comprises an IP device with the broadband video resource capability.
As shown in fig. 6, the embodiment of the present invention includes the following steps:
601, the calling MSC receives a Setup message of the calling terminal, and the called number carried in the message is a multimedia call center number;
step 602, the calling MSC sends a Call _ Proceding message to the calling terminal;
step 603, the calling MSC judges that the called terminal is a multimedia call center according to the called number, and sends an IAM message to the multimedia call center; including in the IAM message: the number of the calling terminal and the multimedia service access code;
step 604, the multimedia call center sends an ACM message to the calling MSC;
step 605, the calling MSC sends Alerting message to the calling terminal;
step 606, the multimedia call center performs multimedia service operation;
step 607, the multimedia call center sends the CPG message carrying the video call indication to the calling MSC;
step 608, the calling MSC sends a Connect message to the calling terminal, indicating that the calling terminal can perform h.245 negotiation;
step 609, the calling terminal returns Connect _ ack to the calling MSC;
step 610, the calling terminal and the multimedia call center negotiate for H.245;
611, the calling terminal interacts with the multimedia service of the multimedia call center;
step 612, the multimedia call center sends an ANM answer signaling to the calling MSC; the calling MSC decides whether to start charging for the calling terminal according to the service requirement.
It can be seen from the above embodiments of the method for implementing a pre-answer multimedia service that, after the multimedia center completes a multimedia service operation according to a call of the calling mobile switching center, a progress indication message is sent to the calling mobile switching center to indicate that it has completed a corresponding multimedia service operation. After receiving the progress indication message, the calling mobile switching center sends a connection request to the calling terminal according to the message to indicate that the calling terminal can initiate a negotiation operation process with the multimedia center. Because the multimedia center uses the progress indication message to indicate that the multimedia service operation is completed, the calling terminal can accurately obtain the capability information of the multimedia center for providing the multimedia service in the negotiation operation process, thereby improving the success rate of the negotiation operation with the multimedia center.
The embodiment of the invention also provides a multimedia center. As shown in fig. 7, the embodiment of the multimedia center includes: a receiving unit 71, an operating unit 72, a transmitting unit 73, a negotiating unit 74 and a multimedia service providing unit 75; wherein,
a receiving unit 71, configured to receive a call request of a calling mobile switching center and a negotiation request of a calling terminal; an operation unit 72, configured to perform a multimedia service operation according to the call request received by the receiving unit; a sending unit 73, configured to send a connection message to the calling mobile switching center after the operating unit 72 completes a multimedia service operation; a negotiation unit 74, configured to perform a negotiation operation with the calling terminal according to the negotiation request received by the receiving unit 71; a multimedia service providing unit 75, configured to provide the pre-answer multimedia service to the calling terminal after the negotiation operation of the negotiation unit 74 is completed.
In addition, at the beginning of the process of establishing a call with the calling terminal, the receiving unit 71 is further configured to receive an initial address message of the calling mobile switching center; the sending unit 73 is further configured to send an address completion message to the calling mobile switching center; and when the call is successfully established, sending a response message to the calling mobile switching center.
In addition, the embodiment of the invention also provides a mobile switching center. As shown in fig. 8, the mobile switching center according to the embodiment of the present invention includes: a message receiving unit 81, and a message sending unit 82. The message receiving unit 81 is configured to receive a connection message sent by the multimedia center after performing a multimedia service operation; a message sending unit 82, configured to send a connection message to a calling terminal when the message receiving unit 81 receives the progress indication message, and instruct the calling terminal to initiate a negotiation process with the multimedia center.
The message receiving unit 81 is further configured to receive a setup message of a calling terminal; the message sending unit 82 is further configured to send a call continuation message to the calling terminal. As shown in fig. 9, the mobile switching center further includes: and a charging unit 83, configured to charge the calling terminal according to the response message sent by the multimedia center and received by the message receiving unit 81.
In summary, in the embodiment of the present invention, after the multimedia center completes the multimedia service operation according to the call of the calling mobile switching center, a progress indication message is sent to the calling mobile switching center to indicate that it has completed the corresponding multimedia service operation. After receiving the progress indication message, the calling mobile switching center sends a connection request to the calling terminal according to the message to indicate that the calling terminal can initiate a negotiation operation process with the multimedia center.
Because the multimedia center uses the progress indication message to indicate that the multimedia service operation is completed, the calling terminal can accurately obtain the capability information of the multimedia center for providing the multimedia service in the negotiation operation process, thereby improving the success rate of the negotiation operation with the multimedia center.
Meanwhile, because there is a time sequence precedence relationship between the multimedia service operation of the multimedia center and the connection message of the calling mobile switching center, that is, only after receiving the progress indication message, the calling mobile switching center will send the connection message to the calling terminal. Therefore, the multimedia center can be ensured to have enough time to complete various complex multimedia business operations, thereby paving the way for providing rich multimedia services before response for the 3G network.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (13)

1. A method for implementing a pre-answer multimedia service, the method comprising the steps of:
performing multimedia service operation according to the call request of the calling mobile switching center;
after the multimedia service operation is completed, sending a progress indication message to the calling mobile switching center, so that the calling mobile switching center sends a connection message to a calling terminal according to the progress indication message;
receiving a negotiation request sent by the calling terminal, and performing negotiation operation with the calling terminal, wherein the negotiation request is sent by the calling terminal after receiving the connection message;
and after the negotiation operation is completed, providing the multimedia service before response to the calling terminal.
2. The method of claim 1, wherein prior to performing a multimedia service operation, the method further comprises:
receiving an initial address message sent by the calling mobile switching center;
and sending an address completion message to the calling mobile switching center, so that the calling mobile switching center sends a ringing message to the calling terminal.
3. The method of claim 1, wherein the step of sending a progress indication message to the calling mobile switching center comprises:
after multimedia service operation, sending a progress indication message to the calling mobile switching center, so that the calling mobile switching center sends a connection message to a calling terminal according to the progress indication message and receives a connection response message sent by the calling terminal.
4. A method for implementing a pre-answer multimedia service, the method comprising the steps of:
receiving a progress indication message sent by a multimedia center;
and sending a connection message to a calling terminal according to the progress indication message, and indicating the calling terminal to initiate a negotiation process with the multimedia center.
5. Method for implementing a pre-answer multimedia service according to claim 4, characterized in that before the step of receiving a progress indication message sent by a multimedia center, said method comprises:
receiving a setup message of a calling terminal;
and sending a call continuation message to the calling terminal.
6. Method for implementing a pre-answer multimedia service according to claim 4 or 5, characterized in that after the step of sending a connection message to the calling terminal according to said progress indication message, said method further comprises:
and receiving the response message sent by the multimedia center, and charging the calling terminal.
7. A multimedia center, comprising:
a receiving unit, configured to receive a call request from a calling mobile switching center and a negotiation request from a calling terminal, where the negotiation request is sent by the calling terminal after receiving a connection message;
the operation unit is used for carrying out multimedia service operation according to the call request received by the receiving unit;
a sending unit, configured to send a progress indication message to the calling mobile switching center after the operation unit completes a multimedia service operation, so that the calling mobile switching center sends the connection message to a calling terminal according to the progress indication message;
the negotiation unit is used for carrying out negotiation operation with the calling terminal according to the negotiation request received by the receiving unit;
and the multimedia service providing unit is used for providing the multimedia service before response to the calling terminal after the negotiation operation of the negotiation unit is completed.
8. The multimedia center of claim 7,
the receiving unit is further configured to receive an initial address message of the calling mobile switching center;
the sending unit is further configured to send an address completion message to the calling mobile switching center; and when the call is successfully established, sending a response message to the calling mobile switching center.
9. A mobile switching center, comprising:
the message receiving unit is used for receiving a progress indication message sent by the multimedia center;
and the message sending unit is used for sending a connection message to the calling terminal according to the progress indication message, and indicating the calling terminal to initiate a negotiation process with the multimedia center.
10. The mobile switching center of claim 9, wherein:
the message receiving unit is also used for receiving a setup message of a calling terminal and receiving a response message sent by the multimedia center;
the message sending unit is further configured to send a call continuation message to the calling terminal;
the mobile switching center further comprises: and the charging unit is used for charging the calling terminal according to the response message received by the message receiving unit.
11. A system for implementing a pre-answer multimedia service, the system comprising: a multimedia center and a calling mobile switching center; wherein,
the multimedia center is used for sending a progress indication message to the calling mobile switching center after multimedia service operation is carried out according to the call of the calling mobile switching center;
and the calling mobile switching center is used for sending a connection message to a calling terminal according to the progress indication message, and indicating the calling terminal to initiate a negotiation process with the multimedia center.
12. The system for implementing pre-answer multimedia services according to claim 11, wherein said multimedia center comprises:
a receiving unit, configured to receive a call request from a calling mobile switching center and a negotiation request from a calling terminal;
the operation unit is used for carrying out multimedia service operation according to the call request received by the receiving unit;
a sending unit, configured to send a progress indication message to the calling mobile switching center after the operation unit completes a multimedia service operation;
the negotiation unit is used for carrying out negotiation operation with the calling terminal according to the negotiation request received by the receiving unit;
and the multimedia service providing unit is used for providing the multimedia service before response to the calling terminal after the negotiation operation of the negotiation unit is completed.
13. The system for implementing pre-answer multimedia services according to claim 11, wherein said mobile switching center comprises:
the message receiving unit is used for receiving a progress indication message sent by the multimedia center;
and the message sending unit is used for sending a connection message to the calling terminal according to the progress indication message to indicate the calling terminal to initiate a negotiation process with the multimedia center.
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CN102316448A (en) * 2010-07-01 2012-01-11 中国移动通信集团公司 Route addressing method, system and device adopting virtual number

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KR100646345B1 (en) * 2005-08-17 2006-11-23 에스케이 텔레콤주식회사 Method and system for providing tone and announcement upon checking subscription for multimedia ring back tone service
CN1859496B (en) * 2006-03-10 2010-07-28 华为技术有限公司 System and method for realizing multimedia color ring service
CN100463471C (en) * 2006-05-17 2009-02-18 中国移动通信集团公司 Method for realizing video color ring broadcast

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* Cited by examiner, † Cited by third party
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CN102316448A (en) * 2010-07-01 2012-01-11 中国移动通信集团公司 Route addressing method, system and device adopting virtual number

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